CN109623336B - Battery cover rolling device - Google Patents
Battery cover rolling device Download PDFInfo
- Publication number
- CN109623336B CN109623336B CN201910012216.2A CN201910012216A CN109623336B CN 109623336 B CN109623336 B CN 109623336B CN 201910012216 A CN201910012216 A CN 201910012216A CN 109623336 B CN109623336 B CN 109623336B
- Authority
- CN
- China
- Prior art keywords
- plate
- pressing
- fixedly connected
- battery cover
- placing
- 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.)
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Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 12
- 238000003825 pressing Methods 0.000 claims abstract description 73
- 239000000758 substrate Substances 0.000 claims description 4
- 238000010030 laminating Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Battery Mounting, Suspending (AREA)
- Telephone Set Structure (AREA)
Abstract
The invention relates to the field of mobile phone assembly equipment and discloses a battery cover rolling device which comprises a base and a mounting frame fixedly connected to the base, wherein a placing plate is connected to the base in a sliding mode, a placing seat for placing a mobile phone is arranged on the placing plate, and a pressing plate and a pressing wheel are arranged on the mounting frame in a lifting mode. The invention has the effect of improving the installation efficiency of the battery cover.
Description
Technical Field
The invention relates to the technical field of mobile phone assembly equipment, in particular to a battery cover rolling device.
Background
At present, the battery cover of the mobile phone is fixed through a buckle and glue, so that the mobile phone is changed from an original detachable battery cover into a battery cover which can be detached through a tool.
The existing battery cover mounting method is that the battery cover is pressed manually by a worker, and pressure is applied to the battery cover by the worker, so that the buckles can be mutually buckled, and the battery cover plate can be bonded by glue.
The prior art solutions described above have the following drawbacks: when the workman presses the battery apron, the application of force that the workman can't be comparatively stable, and the application of force is comparatively concentrated moreover to cause the buckle on the battery cover to be difficult to once only all lock, the workman needs to continue the effect of application of force to the place that does not have the lock, leads to the installation effectiveness of battery cover lower.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a battery cover rolling device which has the effect of improving the installation efficiency of a battery cover.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a battery cover rolling press device, includes base and fixed connection's mounting bracket on the base, sliding connection has the board of placing on the base, place to be provided with on the board and supply the cell-phone to place the seat of placing, the mounting bracket goes up and down to be provided with pressing plate and pressing wheel.
Through adopting above-mentioned technical scheme, the workman places the cell-phone that will install the battery lid on placing the seat, places the battery lid on the cell-phone, then drives the press wheel and descends, makes press wheel and battery lid contact, and the board is placed in the drive and slides afterwards, places the board and slides and drive and place the seat and remove to make the press wheel roll extrusion to the battery lid, thereby make battery lid block on the cell-phone, then workman drives the press board and descends, carries out the secondary to press to the battery lid, thereby is that the battery lid is firm to be fixed on the cell-phone, thereby improves battery lid installation rate.
The invention is further provided with: the pressing plate is arranged on the mounting frame in a lifting manner through a first lifting assembly, the first lifting assembly comprises a first driving cylinder fixedly connected to the mounting frame and a mounting plate fixedly connected to a pushing rod of the first driving cylinder, and the pressing plate is connected to the mounting plate.
Through adopting above-mentioned technical scheme, the catch bar of first actuating cylinder stretches out, drives the mounting panel and moves the mounting panel and move the back and drive the clamp plate and contact with the battery cover to accomplish the pressing of battery cover.
The invention is further provided with: the pressing plate is connected with the mounting plate through a first buffer component, the first buffer component comprises a first through hole formed in the mounting plate, a first collision ring fixedly connected to the first through hole, a first sliding rod fixedly connected to the pressing plate, a first supporting piece fixedly connected to the pressing plate, a first elastic piece sleeved on the first sliding rod and two ends of the first elastic piece in collision with the mounting plate and the pressing plate, and the first sliding rod penetrates through the first through hole and the first collision ring and is in collision with the first collision ring.
Through adopting above-mentioned technical scheme, when pressing the board and battery cover contact, the board is pressed and is driven first slide bar and remove along first through hole and first conflict ring for first butt piece and first conflict ring separation, first elastic component is compressed this moment, thereby makes the pressure that the battery cover received be difficult for too big, also can play better installation simultaneously.
The invention is further provided with: the pressing plate comprises a base plate and a base plate fixedly connected to the base plate, the first sliding rod is fixedly connected to the base plate, a pressing groove is formed in one side, away from the base plate, of the base plate, and a pressing inclined surface is formed in the inner wall of the pressing groove.
Through adopting above-mentioned technical scheme, press the groove and carry out spacingly to the battery lid, press the inclined plane and exert the compressive force to the side of battery lid to make the part that the battery lid did not lock fix on the cell-phone, thereby improved the installation quality of battery lid.
The invention is further provided with: the pressing wheel is arranged on the mounting frame in a lifting manner through a second lifting assembly, the second lifting assembly comprises a second driving cylinder fixedly connected to the mounting frame, a fixed plate fixedly connected to a pushing rod of the second driving cylinder and the mounting frame connected to the fixed plate, and the pressing wheel is rotatably connected to the mounting frame.
Through adopting above-mentioned technical scheme, the catch bar of second drive cylinder stretches out, drives the fixed plate and takes place to remove, drives the installation after the fixed plate removes and removes, and the mounting bracket removes and drives the pressing wheel and be close to the battery cover to realize pressing the pressing wheel to the pressing of battery cover.
The invention is further provided with: the mounting bracket pass through the second buffer assembly with the fixed plate is connected, the second buffer assembly is including seting up second through-hole on the fixed plate, fixed connection be in second conflict ring on the second through-hole, fixed connection are in second sliding rod on the mounting bracket, fixed connection are in second butt piece, the cover on the second sliding rod are established on the second sliding rod and both ends with the second elastic component that fixed plate and mounting bracket contradict, the second sliding rod wears to establish the second through-hole with in the second conflict ring, the second butt piece with the second is contradicted and is held.
Through adopting above-mentioned technical scheme, when pressing wheel and battery cover contact, the mounting bracket drives the second slide bar and removes along second through hole and second conflict ring for second butt piece and the separation of second conflict ring, the second elastic component is compressed this moment, thereby makes the pressure that the battery cover received be difficult for too big, also can play better installation effect simultaneously.
The invention is further provided with: the pressing wheel comprises an abutting wheel which is rotationally connected to the inner walls of the two sides of the mounting frame, and contact wheels with the two ends fixedly connected with the abutting wheel respectively, wherein pressing inclined planes are formed in one ends, facing each other, of the abutting wheels.
Through adopting above-mentioned technical scheme, when the butt wheel takes place to contact with the battery cover, the pressfitting inclined plane exerts the compressive force to the side of battery cover to make the part that the battery cover did not lock fix on the cell-phone, thereby improved the installation quality of battery cover.
The invention is further provided with: the side pressure assembly comprises a side pressure cylinder fixedly connected to the placing plate, and a side pressure head fixedly connected to a pushing rod of the side pressure cylinder and used for applying pressure to the battery cover.
Through adopting above-mentioned technical scheme, the side pressure cylinder drives the side pressure head and removes, presses the lateral wall of battery case after the side pressure head removes to make the part that the battery cover did not lock fix on the cell-phone, thereby improved the installation quality of battery cover.
The invention is further provided with: the mobile phone placing device is characterized in that a placing groove for placing the mobile phone is formed in the placing seat, a sliding groove is formed in the placing seat, the sliding groove is communicated with the placing groove, and the side pressing head is located in the sliding groove.
Through adopting above-mentioned technical scheme, the setting of standing groove makes the cell-phone can be comparatively stable be located and place the seat to make the cell-phone shell be difficult for leaving under the roll extrusion of pressing the wheel and place the seat.
In summary, the invention has the following beneficial effects:
1. through setting up press wheel and pressing plate, press wheel and pressing plate all press the battery cover to make the battery cover can comparatively fast and comparatively stable install on the cell-phone, thereby improved battery cover installation effectiveness;
2. through setting up the side pressure subassembly, the side pressure subassembly further presses the battery cover that pressing wheel and pressing plate pressed to make the fixing between battery cover and the cell-phone more inseparable, thereby improved battery cover installation effectiveness.
Drawings
FIG. 1 is a schematic view of the external structure of the present invention;
FIG. 2 is a schematic diagram showing the connection structure of a placement plate and a rodless cylinder;
FIG. 3 is an enlarged view at A of FIG. 1 showing the connection structure of the side pressure cylinder and the side pressure head;
FIG. 4 is a schematic diagram showing the connection structure of the first drive cylinder and the mounting plate;
FIG. 5 is an enlarged view of portion B of FIG. 4, showing the connection of the base plate and the backing plate;
fig. 6 is a schematic diagram showing a connection structure of the second driving cylinder and the fixing plate;
FIG. 7 is an enlarged view of FIG. 6 at C, showing the connection of the abutment wheel to the contact wheel;
fig. 8 is a schematic cross-sectional view showing a connection structure of the fixing plate and the second through hole.
Reference numerals: 1. a base; 11. a mounting frame; 12. placing a plate; 13. a rodless cylinder; 2. a placement seat; 21. a placement groove; 22. a sliding groove; 3. a side pressure assembly; 31. a side pressure cylinder; 32. a side pressure head; 4. a first lifting assembly; 41. a first driving cylinder; 42. a mounting plate; 5. pressing the plate; 51. a substrate; 52. a backing plate; 521. a pressing groove; 522. pressing the inclined plane; 6. a first cushioning assembly; 61. a first through hole; 62. a first interference ring; 63. a first slide bar; 64. a first contact piece; 65. a first elastic member; 7. a second lifting assembly; 71. a second driving cylinder; 72. a fixing plate; 73. a second cushioning assembly; 731. a second via hole; 732. a second interference ring; 733. a second slide bar; 734. a second contact piece; 735. a second elastic member; 74. pressing the wheel; 741. an abutment wheel; 742. a contact wheel; 743. pressing the inclined plane; 75. and a rotating frame.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the battery cover rolling device disclosed by the invention comprises a base 1, wherein a mounting frame 11 is fixedly connected to the base 1, and two ends of the mounting frame 11 are fixedly connected with the base 1. The base 1 is slidably connected with a placement plate 12, the placement plate 12 is slidably connected to the base 1 through two rodless cylinders 13, and the two rodless cylinders 13 are fixedly connected to the base 1. The placing plate 12 is fixedly connected with a placing seat 2, the placing seat 2 is made of polyurethane, and a placing groove 21 is formed in one side, far away from the placing plate 12, of the placing seat 2. Referring to fig. 1 and 3, a side pressure assembly 3 is disposed on a placement plate 12, the side pressure assembly 3 includes a plurality of side pressure cylinders 31 and side pressure heads 32, the plurality of side pressure cylinders 31 are fixedly connected to the placement plate 12 and uniformly distributed on the circumferential side of the placement base 2, and the side pressure heads 32 are fixedly connected to push rods of the side pressure cylinders 31. A plurality of sliding grooves 22 are formed in one side, far away from the placing plate 12, of the placing seat 2, the sliding grooves 22 are communicated with the placing grooves 21, the sliding grooves 22 are located at the edge of the placing seat 2 and distributed along the peripheral side of the placing seat 2, and the lateral pressure heads 32 are slidably connected in the sliding grooves 22.
Referring to fig. 4 and 5, a pressing plate 5 is provided on a mounting frame 11 through lifting of a first lifting assembly 4, the first lifting assembly 4 comprises a first driving cylinder 41 and a mounting plate 42, the first driving cylinder 41 is fixedly connected to the mounting frame 11, the mounting plate 42 is fixedly connected to a pushing rod of the first driving cylinder 41, the mounting plate 42 is connected with the pressing plate 5 through a first buffer assembly 6, the pressing plate 5 comprises a base plate 51 and a base plate 52, the base plate 52 made of polyurethane is fixedly connected to the base plate 51, a pressing groove 521 is formed in one side, far from the base plate 51, of the base plate 52, and a pressing inclined surface 522 is formed in the edge of the pressing groove 521. The first buffer assembly 6 includes a first through hole 61, a first abutting ring 62, a first sliding rod 63, a first abutting piece 64 and a first elastic member 65, the four first through holes 61 are formed in four corners of the mounting plate 42, the first abutting ring 62 is fixedly connected to the first through hole 61, the first sliding rod 63 is fixedly connected to the four corners of the base plate 51, the first sliding rod 63 is arranged in the first through hole 61 and the first abutting ring 62 in a penetrating manner, the first abutting piece 64 is fixedly connected to one end of the first sliding rod 63 far away from the base plate 51, the first abutting piece 64 abuts against one end of the first abutting ring 62 far away from the mounting plate 42, the first elastic member 65 is sleeved on the first sliding rod 63, the first elastic member 65 is a spring, and two ends of the first elastic member 65 abut against the base plate 51 and the mounting plate 42 respectively.
Referring to fig. 6 and 8, a pressing wheel 74 is provided on the mounting frame 11 through the second lifting assembly 7, the second lifting assembly 7 includes a second driving cylinder 71, a fixing plate 72 and a rotating frame 75, the second driving cylinder 71 is fixedly connected to the mounting frame 11, the fixing plate 72 is fixedly connected to a pushing rod of the second driving cylinder 71, and the rotating frame 75 is connected to the fixing plate 72 through a second buffering assembly 73. The second buffer assembly 73 includes a second through hole 731, a second abutting ring 732, a second sliding rod 733, a second abutting piece 734 and a second elastic member 735, the two second through holes 731 are formed at two ends of the fixed plate 72, the second abutting ring 732 is fixedly connected to the second through hole 731, the second sliding rod 733 is fixedly connected to two ends of the rotating frame 75, the second sliding rod 733 is arranged in the second through hole 731 and the second abutting ring 732 in a penetrating manner, the second abutting piece 734 is fixedly connected to one end of the second sliding rod 733 far away from the rotating frame 75, the second abutting piece 734 abuts against one end of the second abutting ring 732 far away from the fixed plate 72, the second elastic member 735 is sleeved on the second sliding rod 733, the second elastic member 735 is a spring, and two ends of the second elastic member 735 respectively abut against the fixed plate 72 and the rotating frame 75.
Referring to fig. 7, the pressing wheel 74 is rotatably connected in the rotating frame 75, the pressing wheel 74 includes an abutment wheel 741 and a contact wheel 742, the abutment wheel 741 is rotatably connected on inner walls of both sides of the rotating frame 75, a pressing inclined surface 743 is provided on one end of the abutment wheel 741 facing each other, both ends of the contact wheel 742 are fixedly connected with the abutment wheel 741, and a radius of the contact wheel 742 is equal to a radius of one end of the abutment wheel 741 facing the contact wheel 742.
The implementation principle of the embodiment is as follows: the worker firstly places the mobile phone in the placement groove 21, then places the battery cover on the mobile phone, then the second driving air cylinder 71 drives the fixing plate 72 to move, the fixing plate 72 moves to drive the rotating frame 75 to move, the rotating frame 75 drives the pressing wheel 74 to move, the pressing inclined surface 743 is abutted with the side edge of the battery cover, and the pressing wheel 74 is abutted with the upper side of the battery cover. Then, the rodless cylinder 13 drives the placing plate 12 to reciprocate once, the placing plate 12 moves to drive the placing seat 2 to move, so that the pressing wheel 74 presses the battery cover, when the pressing wheel 74 presses the battery cover, the rotating frame 75 drives the second sliding rod 733 to move along the second through hole 731 and the second abutting ring 732, so that the second abutting piece 734 is separated from the second abutting ring 732, at the moment, the second elastic piece 735 is compressed, so that the pressure applied to the battery cover is not easy to be too large, and when the pressing of the battery cover is finished, the second driving cylinder 71 drives the pressing wheel 74 to leave the battery cover. Then, the first driving cylinder 41 drives the pressing plate 5 to move towards the battery cover, so that the backing plate 52 is in contact with the battery cover, the pressing inclined surface 522 applies pressure to the side surface of the battery cover, and meanwhile, the side pressing cylinder 31 drives the side pressing head 32 to apply pressure to the side surface of the battery cover, so that the battery cover is quickly fixed on a mobile phone, and the battery cover effect is good.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. The utility model provides a battery cover rolling press device which characterized in that: comprises a base (1) and a mounting frame (11) fixedly connected to the base (1), a placing plate (12) is slidably connected to the base (1), a placing seat (2) for placing a mobile phone is arranged on the placing plate (12), a pressing plate (5) and a pressing wheel (74) are arranged on the mounting frame (11) in a lifting manner, the pressing plate (5) is arranged on the mounting frame (11) in a lifting manner through a first lifting assembly (4), the first lifting assembly (4) comprises a first driving cylinder (41) fixedly connected to the mounting frame (11), a mounting plate (42) fixedly connected to a pushing rod of the first driving cylinder (41), the pressing plate (5) is connected to the mounting plate (42) through a first buffer assembly (6), the pressing wheel (74) is arranged on the mounting frame (11) in a lifting manner through a second lifting assembly (7), the moving direction of the pressing plate (5) and the moving direction of the pressing wheel (74) are parallel to the moving direction of the pressing wheel (74), the pressing plate (5) is connected to the substrate (51) in a moving path perpendicular to the substrate (51) which is arranged on the substrate (51), the utility model provides a battery cover, including base plate (51) is connected to first buffer module (6), backing plate (52) are kept away from offer on one side of base plate (51) and press groove (521), press inclined plane (522) have been offered on the inner wall of pressing groove (521) press round (74) including rotating connect abutting wheel (741) on mounting bracket (11) both sides inner wall, both ends respectively with abutting wheel (741) fixed connection's contact wheel (742), laminating inclined plane (743) have been offered on abutting wheel (741) one end towards each other be provided with side pressure subassembly (3) on placing board (12), side pressure subassembly (3) are including fixed connection side pressure cylinder (31) on placing board (12), fixed connection be in on the push rod of side pressure cylinder (31) and be used for applying pressure's side pressure head (32) to the battery cover.
2. The battery cover rolling device of claim 1, wherein: the first buffer assembly (6) comprises a first through hole (61) formed in the mounting plate (42), a first collision ring (62) fixedly connected to the first through hole (61), a first sliding rod (63) fixedly connected to the pressing plate (5), a first contact piece (64) fixedly connected to the first sliding rod (63), and a first elastic piece (65) sleeved on the first sliding rod (63) and having two ends abutting against the mounting plate (42) and the pressing plate (5), wherein the first sliding rod (63) penetrates through the first through hole (61) and the first collision ring (62), and the first contact piece (64) abuts against the first collision ring (62).
3. The battery cover rolling device of claim 1, wherein: the second lifting assembly (7) comprises a second driving air cylinder (71) fixedly connected to the mounting frame (11), a fixed plate (72) fixedly connected to a pushing rod of the second driving air cylinder (71), and the mounting frame (11) connected to the fixed plate (72), and the pressing wheel (74) is rotatably connected to the mounting frame (11).
4. A battery cover rolling apparatus as claimed in claim 3, wherein: the mounting frame (11) is connected with the fixed plate (72) through a second buffer component (73), the second buffer component (73) comprises a second through hole (731) formed in the fixed plate (72), a second collision ring (732) fixedly connected with the second through hole (731), a second sliding rod (733) fixedly connected with the mounting frame (11), a second contact piece (734) fixedly connected with the second sliding rod (733), and a second elastic piece (735) sleeved on the second sliding rod (733) and provided with two ends abutting against the fixed plate (72) and the mounting frame (11), wherein the second sliding rod (733) penetrates through the second through hole (731) and the second collision ring (732), and the second contact piece (734) abuts against the second collision ring (732).
5. The battery cover rolling device of claim 1, wherein: the mobile phone placing device is characterized in that a placing groove (21) for placing a mobile phone is formed in the placing seat (2), a sliding groove (22) is formed in the placing seat (2), the sliding groove (22) is communicated with the placing groove (21), and the side pressing head (32) is located in the sliding groove (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910012216.2A CN109623336B (en) | 2019-01-07 | 2019-01-07 | Battery cover rolling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910012216.2A CN109623336B (en) | 2019-01-07 | 2019-01-07 | Battery cover rolling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109623336A CN109623336A (en) | 2019-04-16 |
| CN109623336B true CN109623336B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910012216.2A Active CN109623336B (en) | 2019-01-07 | 2019-01-07 | Battery cover rolling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109623336B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110566555B (en) * | 2019-09-10 | 2024-04-02 | 适新科技（苏州）有限公司 | Optimized structure of rolling tool |
| CN110939638B (en) * | 2019-12-03 | 2022-07-29 | Tcl王牌电器(惠州)有限公司 | Pressure maintaining module and screen pressure maintaining machine |
| CN112548528A (en) * | 2020-12-09 | 2021-03-26 | 深圳佰维存储科技股份有限公司 | Shell pressing device |
| CN113685405B (en) * | 2021-08-24 | 2022-11-22 | 歌尔股份有限公司 | Rolling equipment |
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