CN216291052U - Combined mobile phone protective sleeve with support - Google Patents

Combined mobile phone protective sleeve with support Download PDF

Info

Publication number
CN216291052U
CN216291052U CN202122641019.2U CN202122641019U CN216291052U CN 216291052 U CN216291052 U CN 216291052U CN 202122641019 U CN202122641019 U CN 202122641019U CN 216291052 U CN216291052 U CN 216291052U
Authority
CN
China
Prior art keywords
support
frame
mobile phone
plane
protective sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202122641019.2U
Other languages
Chinese (zh)
Inventor
张义强
肖伟
张弼淦
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.)
Guangzhou Eastmate Plastic Products Co ltd
Original Assignee
Guangzhou Eastmate Plastic Products 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 Guangzhou Eastmate Plastic Products Co ltd filed Critical Guangzhou Eastmate Plastic Products Co ltd
Priority to CN202122641019.2U priority Critical patent/CN216291052U/en
Application granted granted Critical
Publication of CN216291052U publication Critical patent/CN216291052U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The utility model discloses a combined mobile phone protective sleeve with a support, which comprises a protective sleeve and a support assembly arranged on the protective sleeve, wherein the protective sleeve comprises a front frame, a middle frame and a rear frame, a convex edge used for coating the edge of a mobile phone is arranged on the front frame, the front frame and the middle frame are spliced to form a cavity used for placing the mobile phone, the side edge of the rear frame detachably coats the side edge of the cavity to form the protective sleeve in a combined mode, the support assembly comprises a support frame arranged on the protective sleeve and a support body, one end of the support body is hinged to the support frame, the length of the support body is not less than 0.5 time of the width of the protective sleeve, and the support body is connected with the support frame through a clamping block and clamping groove structure. This application can pack up the stake body through T type fixture block and draw-in groove as the support of cell-phone through opening articulated stake body when not using, need not to use external cell phone stand or cell-phone to press from both sides, combines the protective sheath structure of multilayer, has strengthened the stability of protective properties and support, has convenient to use, advantage that the suitability is strong.

Description

Combined mobile phone protective sleeve with support
Technical Field
The utility model relates to the technical field of mobile phone protective sleeves, in particular to a combined mobile phone protective sleeve with a support.
Background
The mobile phone has become increasingly popular as a communication tool, and with the development of science and technology, the functions of the mobile phone are more and more, and the mobile phone has been integrated into the lives of people. At present, most mobile phones have a video playing function, and the existing mobile phones have large screens, high resolution and good video watching effect, and more people like watching videos by using mobile phones. However, most mobile phones do not have a part for supporting the mobile phone, so people can use an external mobile phone support or a mobile phone clip when watching videos by using the mobile phone, but when going out, people cannot conveniently carry the mobile phone support or the mobile phone clip, and therefore, people who want to use the mobile phone to watch videos are very inconvenient.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides a combined mobile phone protective sleeve with a support. The mobile phone can be stably supported by opening the mobile phone support when a user needs to watch videos or other occasions where the user needs to support the mobile phone, and the mobile phone support or the mobile phone clip does not need to be additionally carried.
According to one aspect of the application, a combined mobile phone protective sleeve with a support is provided, which comprises a protective sleeve and a support component arranged on the protective sleeve, wherein the protective sleeve comprises a front frame, a middle frame and a rear frame,
the front frame is provided with a convex edge for coating the edge of the mobile phone, the front frame and the middle frame are spliced to form a cavity for placing the mobile phone, the side edge of the rear frame detachably coats the side edge of the cavity to form a protective sleeve,
the bracket component articulates the stake body on the stake frame including setting up stake frame and one end on the protective sheath, and the wide length of the protective sheath that the length of stake body is not less than 0.5 times is equipped with T type fixture block on the side of stake body, is equipped with the draw-in groove that corresponds with T type fixture block on the stake frame, and two lateral walls of draw-in groove all extend to the middle part of draw-in groove and have the lug.
The utility model provides a combination formula area support cell-phone protective sheath is through being equipped with the bracket component on the protective sheath, thereby can be through opening the support of articulated stake body as the cell-phone, can pack up the stake body through T type fixture block and draw-in groove when not using, need not to use external cell phone stand or cell-phone to press from both sides, the chimb structure of preceding frame can protect the positive edge of cell-phone well on the protective sheath simultaneously, and the protective sheath forms the cavity that covers the cell-phone through combined preceding frame and center, the side cladding of rethread back frame with preceding frame and center combination, can guarantee the combination stability of preceding frame and center, with all-round protection cell-phone, can also strengthen the stability of protective properties and support, and the mobile phone protection device is convenient to use, and has the advantage that the suitability is strong.
In some embodiments, the contact portion of the T-shaped fixture block and the protrusion is configured as an arc surface or an inclined surface, and the contact portion of the protrusion and the T-shaped fixture block is configured as an arc surface or an inclined surface.
From this, can set up to arc surface or inclined plane through the face with on T type fixture block and the lug both inconsistent for the stake body can be easier when packing up or opening, can keep certain lock performance simultaneously, avoids the stake body to open at will.
In some embodiments, the two sides of the slot are provided with empty slots, so that the side walls of the slot and the bumps are combined to form a snap structure.
From this, can set up the dead slot through the both sides at the draw-in groove for the lateral wall of draw-in groove forms thin wall structure, increases its performance of deformation, makes the stake body can block into in the recess or break away from the recess more easily when packing up or opening T type fixture block.
In some embodiments, a ladder groove is provided on a side of the other end of the stand body facing the stand frame.
From this, can be through setting up the ladder groove for when the stake body is opened to needs, can be more convenient for dial the stake body from this end.
In some embodiments, the bracket frame is provided with a rib for limiting the opening angle of the bracket body.
Therefore, the maximum opening angle of the support body can be limited through the retaining side, so that the support body can be supported by the retaining side when being opened to the maximum opening angle, and the mobile phone can be better supported.
In some embodiments, one end of the bracket body hinged with the bracket frame is provided with a circular shaft concentric with the hinged rotating shaft, the circular shaft is provided with a first plane and a second plane, one sides of the first plane and the second plane are connected, the bracket frame is provided with an inclined plane,
when the bracket body is completely opened, the first plane is attached to the inclined plane,
when the bracket body is not completely opened, the second plane is attached to the inclined plane.
Therefore, the support body can be arranged through the first plane and the second plane, when the support body is opened to a certain angle, the inclined plane is abutted against the second plane, the support body is continuously opened outwards through applying external force again, the inclined plane can stride over the side edges connected with the first plane and the second plane to be abutted against the first plane and is matched with the blocking edges to jointly provide supporting force for the support body, and the support body is kept at the position of the maximum opening angle to better support the mobile phone.
In some embodiments, the connecting position of the first plane and the second plane is provided as a circular arc surface.
Thereby, it is easier when the inclined surface crosses the side where the first plane and the second plane are connected.
In some embodiments, the bracket assembly is disposed at a position near the bottom of the protective sleeve, and the turning direction of the bracket body is from the bottom to the top of the protective sleeve.
From this, can be through setting up the position with the bracket component for the cell-phone can be supported to the combination formula area support cell-phone protective sheath of this application vertically, also can support the cell-phone transversely.
In some embodiments, the other end of the stent body is rounded.
Therefore, different supporting points and supporting modes in different directions can be adapted to the end part of the arc-shaped support body.
In some embodiments, the bracket assembly is disposed on a center frame, and the rear frame is provided with an opening for exposing the bracket assembly.
Therefore, the support body can not form a convex structure when being folded by the arrangement, and the normal flat placement of the protective sleeve when in use is influenced.
Drawings
Fig. 1 is a schematic structural view of a combined mobile phone protective case with a support in a retracted state according to an embodiment of the present invention;
FIG. 2 is an exploded view of the protective casing portion of the embodiment of FIG. 1;
FIG. 3 is a schematic structural view of the embodiment of FIG. 1 with the stent body in an open state;
FIG. 4 is an enlarged schematic view of portion A of FIG. 3;
FIG. 5 is a schematic cross-sectional view of the embodiment of FIG. 1 with the stent body in a stowed position;
FIG. 6 is an enlarged schematic view of portion B of FIG. 5;
FIG. 7 is a cross-sectional structural view of the embodiment of FIG. 1 with the stent body in an open state;
FIG. 8 is an enlarged view of the portion C of FIG. 7;
description of reference numerals: 1. a protective sleeve; 11. a front frame; 111. a convex edge; 12. a middle frame; 13. a rear frame; 14. a mobile phone; 2. a bracket assembly; 21. a stent body; 22. a support frame; 23. a T-shaped fixture block; 24. a card slot; 241. a bump; 3. an empty groove; 4. a circular shaft; 41. a first plane; 42. a second plane; 5. a ladder groove; 6. blocking edges; 7. an inclined surface.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 to 8 schematically show the structure of the combined mobile phone protective case with a support according to the novel embodiment of the present invention.
According to an aspect of the application, a combined mobile phone protective case with a support is provided, refer to fig. 1 and fig. 2, the combined mobile phone protective case with a support comprises a protective case 1 and a support component 2 arranged on the protective case 1, the protective case 1 comprises a front frame 11, a middle frame 12 and a rear frame 13, a convex edge 111 used for covering the edge of the upper surface of a mobile phone 14 is arranged on the front frame 11, side protection surfaces used for covering the side surface of the mobile phone 14 are formed by splicing and matching the side edges of the front frame 11 and the middle frame 12, a back protection surface used for covering the back surface of the mobile phone 14 is arranged on the middle frame 12, so that a cavity used for placing the mobile phone 14 is formed by splicing and matching the front frame 11 and the middle frame 12, and the splicing and matching between the front frame 11 and the middle frame 12 can be realized by a clamping block clamping manner. The rear frame 13 includes the outside of establishing in front frame 11 and center 12 through the cover ground cover, with the cladding side mask, make front frame 11 and center 12 difficult emergence break away from, the three makes up and forms protective sheath 1, the material of concrete front frame 11 and center 12 can adopt rigid material, the material of rear frame 13 can adopt flexible material, thereby can strengthen the protection to cell-phone 14 through rigid front frame 11 and center 12, and combine flexible rear frame 13 to coat front frame 11 and center 12, improve holistic protective properties, carry out the omnidirectional protection to cell-phone 14.
Referring to fig. 3, the bracket assembly 2 includes a bracket frame 22 disposed on the rear side of the protective cover 1 and a bracket body 21 having one end hinged on the bracket frame 22, the length of the bracket body 21 is not less than 0.5 times of the width of the protective cover 1, the bracket body 21 can be a sheet structure to reduce the occupied volume, the bracket frame 22 can be disposed on the rear side of the rear frame 13 and also on the rear side of the middle frame 12, specifically, in this embodiment, the bracket frame 22 is disposed on the rear side of the middle frame 12, correspondingly, an opening for exposing the bracket assembly 2 is disposed on the rear side of the rear frame 13, so that the bracket assembly 2 can be disposed on the protective cover 1 without protruding the protective cover 1, so as not to affect the normal horizontal placement of the protective cover 1 when in use.
Referring to fig. 2 and 3, the setting position of the bracket assembly 2 only needs to be set on the rear side of the protective cover 1, in some embodiments, the setting position of the bracket assembly 2 may be set at a position near the bottom of the rear side of the protective cover 1, specifically, may be set on the right side near the bottom, and the opening direction of the bracket body 21 may be a direction turning from the bottom of the protective cover 1 toward the top, i.e., the S direction in fig. 3, and the bracket body 21 is folded only by turning the bracket body 21 against the S direction in fig. 3, and meanwhile, the end of the other end of the bracket body 21 may be set to be a circular arc shape. By setting the setting position of the support component 2 and the arc-shaped structural style of the end part, the combined mobile phone protective case with the support can vertically support the mobile phone 14 and can also horizontally support the mobile phone 14, when the mobile phone 14 needs to be vertically supported, the support component 2 only needs to be normally opened, and after the support body 21 is opened, the support body 21 can also effectively support the horizontal mobile phone 14 due to the setting of the length of the support body 21, meanwhile, the structure of the end part of the arc-shaped support body 21 can also enable the support body 21 to adapt to the vertical supporting mode and the horizontal supporting mode, and can better adapt to various types of placing surfaces for placing the mobile phone 14.
Referring to fig. 4 to 8, specifically, in the structure of the support body 21 and the support frame 22, a T-shaped fixture block 23 is disposed on a side surface of the support body 21 close to the support frame 22 when the support body is retracted, correspondingly, a clamping groove 24 matched with the T-shaped fixture block 23 is disposed on the support frame 22, and a protrusion 241 extends from each of two inner side walls of the clamping groove 24 to the middle of the clamping groove 24, so that when the support body 21 is retracted, the T-shaped fixture block 23 can be clamped into the clamping groove 24 to be limited by the protrusion 241, and the support body 21 cannot be opened at will.
Referring to fig. 4 and 6, in some embodiments, a portion of a surface of the T-shaped fixture block 23 contacting the protrusion 241 may be configured as an arc surface or an inclined surface, specifically, referring to fig. 6, both sides of a lower surface of the T-shaped fixture block 23 in fig. 6 are configured as arc surfaces, an upper surface of the T-shaped fixture block 23 is configured as an inclined surface, and an upper surface and a lower surface of the protrusion 241 are both configured as inclined surfaces, so that the T-shaped fixture block 23 can be easily clamped into the clamping groove 24, and meanwhile, a certain buckling performance can be maintained, and the bracket body 21 is prevented from being opened at will.
Referring to fig. 4 and 6, further, empty slots 3 may be further disposed on two sides of the card slot 24, so that the side wall of the card slot 24 and the protrusion 241 form a snap structure in combination. Specifically, the two empty slots 3 are arranged close to the slot 24, so that the side wall of the slot 24 forms a thin-walled structure, and the deformation performance of the slot is improved, so that when the slot is extruded by the T-shaped fixture block 23, the side wall of the slot 24 can deform, the projection 241 moves to the outer side of the slot 24, and the T-shaped fixture block 23 can be smoothly clamped into the slot 24 or separated from the slot 24.
Referring to fig. 4, in some embodiments, a step groove 5 is formed on a side surface of the bracket frame 22 close to the other end of the bracket body 21 when the bracket body 21 is retracted, so that the bracket body 21 can be lifted up through the step groove 5 when the bracket body 21 is retracted, and the T-shaped latch 23 of the bracket body 21 is disengaged from the latch groove 24. Further, the position department that is provided with the one end of ladder groove 5 when support body 21 is packed up on support frame 22 can be for sinking to the below of ladder groove 5 to it is more convenient when support body 21 is pulled up from ladder groove 5 to make the user.
Referring to fig. 7 and 8, in some embodiments, the holder frame 22 is provided with a rib 6 for limiting an opening angle of the holder body 21, thereby limiting a maximum opening angle of the holder body 21. The limitation of the maximum angle of the support body 21 can effectively improve the stability of the support assembly 2 when in use, and the maximum angle can be specifically set according to the length, the setting position, and the like of the support body 21, and in this embodiment, the maximum angle is exemplarily 120 ° as an example for description. After the retaining edge 6 is arranged, when the support body 21 is opened to the position of the maximum angle, the retaining edge 6 can block the support body, so that a supporting force is formed, and the mobile phone 14 can be better supported by the support body.
Further, the support can better support the mobile phone 14 through the structure of the hinge part between the support frame 22 and the support body 21. Specifically, referring to fig. 8, one end of the support body 21, which is hinged to the support frame 22, is provided with a circular shaft 4 concentric with the hinge shaft, the hinge shaft penetrates through the center of the circular shaft 4, two ends of the hinge shaft are connected and fixed to the support frame 22 to realize the hinge of the support body 21 and the support frame 22, the circular shaft 4 is provided with a first plane 41 and a second plane 42, one sides of the first plane 41 and the second plane 42 are connected, the first plane 41 and the second plane 42 are both tangent to the outer side surface of the circular shaft 4, the support frame 22 is further provided with an inclined plane 7 tangent to the circular shaft 4, the first plane 41 is also provided to be attached to the inclined plane 7 when the support body 21 is opened to the maximum angle, and the second plane 42 is provided to be attached to the inclined plane 7 when the second plane 42 is not opened to the maximum angle when the support body 21 is attached to the inclined plane 7. Due to the arrangement, the first plane 41 and the second plane 42 are both tangent to the outer side surface of the circular shaft 4, the radius corresponding to the adjacent position of the first plane 41 and the second plane 42 is inevitably larger than the radius of the circular shaft 4, so that a convex structure can be formed, and the inclined plane 7 arranged on the support frame 22 is tangent to the circular shaft 4, and the position of the first plane 41 and the second plane 42 is arranged, so that the support body 21 can firstly rotate to the state that the second plane 42 is attached to the inclined plane 7 in the process of rotating to the maximum angle, and then the support body 21 rotates by applying external force again, so that the side edge connected with the first plane 41 and the second plane 42 crosses the inclined plane 7, and the first plane 41 is attached to the inclined plane 7, and then the support body 21 rotates to the position of the maximum angle.
In order to make the side where the first plane 41 and the second plane 42 are connected to each other more easily cross the inclined plane 7 when rotating, the side wall where the first plane 41 and the second plane 42 are connected may be provided as a circular arc surface. After the arrangement in the mode, when the support body 21 rotates to the position with the largest angle, the support force of the flange 6 to the support body 21 and the support force of the inclined surface 7 to the support body 21 are simultaneously received, and the support effect of the support assembly 2 can be effectively improved through the combined action of the two support forces.
Specifically, the combined mobile phone protective sleeve with the support provided by the application is used, only the mobile phone 14 needs to be put into the protective sleeve 1, when the support component 2 needs to be used, the support body 21 is stirred, the T-shaped clamping block 23 on the support body 21 is separated from the clamping groove 24, the support body 21 is opened to a proper angle or is directly opened to a maximum angle, the support body 21 is enabled to be supported by the retaining edge 6 and the inclined surface 7, and then the mobile phone 14 is placed on a placing surface such as a desktop to support the mobile phone 14. When the bracket assembly 2 is used up or the bracket assembly 2 is not needed, only the bracket body 21 needs to be retracted, and the T-shaped clamping block 23 on the bracket body 21 is clamped into the clamping groove 24, so that the use process is simple and convenient.
The utility model provides a modular take support cell-phone protective sheath is through being equipped with bracket component 2 on protective sheath 1, thereby can be through opening articulated stake body 21 as the support of cell-phone 14, can pack up stake body 21 through T type fixture block 23 and draw-in groove 24 when not using, need not to use external cell-phone 14 support or cell-phone 14 to press from both sides, still add combined preceding frame 11 and center 12 formation cladding cell-phone 14's cavity simultaneously, the side cladding of rethread back frame 13 with preceding frame 11 and center 12 combination, the combination stability of frame 11 and center 12 before guaranteeing, the stability of protective properties and support has still been strengthened, and the utility model has the advantages of convenient to use, and the suitability is strong.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims (10)

1. Modular area support cell-phone protective sheath, its characterized in that: comprises a protective sleeve and a bracket component arranged on the protective sleeve, the protective sleeve comprises a front frame, a middle frame and a rear frame,
the front frame is provided with a convex edge for coating the edge of the mobile phone, the front frame and the middle frame are spliced to form a cavity for placing the mobile phone, the side edge of the rear frame detachably coats the side edge of the cavity to form a protective sleeve,
the bracket component comprises a bracket frame arranged on the protective sleeve and a bracket body with one end hinged on the bracket frame, wherein the length of the bracket body is not less than 0.5 times of the width of the protective sleeve, a T-shaped clamping block is arranged on one side face of the bracket body, a clamping groove corresponding to the T-shaped clamping block is arranged on the bracket frame, and two side walls of the clamping groove extend to the middle of the clamping groove to form a convex block.
2. The combined mobile phone protective case with support of claim 1, wherein: the part of the T-shaped fixture block, which is in contact with the projection, is set to be an arc surface or an inclined surface, and the part of the projection, which is in contact with the T-shaped fixture block, is set to be an arc surface or an inclined surface.
3. The combined mobile phone protective case with support of claim 1, wherein: the two sides of the clamping groove are provided with empty grooves, so that the side wall of the clamping groove and the convex block are combined to form a spring buckle structure.
4. The combined mobile phone protective case with support of claim 1, wherein: and a ladder groove is formed in one side face, facing the support frame, of the other end of the support body.
5. The combined mobile phone protective case with support of claim 1, wherein: and the bracket frame is provided with a flange for limiting the opening angle of the bracket body.
6. The combined handset protective case with a support according to claim 5, wherein: one end of the support body, which is hinged with the support frame, is provided with a circular shaft which is concentric with the hinged rotating shaft, the circular shaft is provided with a first plane and a second plane, one sides of the first plane and the second plane are connected, the support frame is provided with an inclined plane,
when the bracket body is completely opened, the first plane is attached to the inclined plane,
when the bracket body is not completely opened, the second plane is attached to the inclined plane.
7. The combination handset protective case with a stand of claim 6, wherein: the connecting position of the first plane and the second plane is set to be an arc surface.
8. The combined mobile phone protective case with support of claim 1, wherein: the bracket component is arranged at the position, close to the bottom, of the protective sleeve, and the turning direction of the bracket body is from the bottom to the top of the protective sleeve.
9. The combination handset protective case with a stand of claim 8, wherein: the other end of the bracket body is arc-shaped.
10. The combination handset protective case with holder according to any one of claims 1 to 9, wherein: the bracket component sets up on the center, be equipped with the trompil that is used for exposing the bracket component on the back frame.
CN202122641019.2U 2021-10-29 2021-10-29 Combined mobile phone protective sleeve with support Active CN216291052U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122641019.2U CN216291052U (en) 2021-10-29 2021-10-29 Combined mobile phone protective sleeve with support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122641019.2U CN216291052U (en) 2021-10-29 2021-10-29 Combined mobile phone protective sleeve with support

Publications (1)

Publication Number Publication Date
CN216291052U true CN216291052U (en) 2022-04-12

Family

ID=81004062

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122641019.2U Active CN216291052U (en) 2021-10-29 2021-10-29 Combined mobile phone protective sleeve with support

Country Status (1)

Country Link
CN (1) CN216291052U (en)

Similar Documents

Publication Publication Date Title
US7773957B2 (en) Mobile communication terminal with rotational display unit
US20100072334A1 (en) Holder for Electronic Device with Support
KR20040079134A (en) Desk top charger for bar type portable wireless terminal
CN101005523A (en) Communication portable device
KR101892546B1 (en) Mobile phone cover
KR100663486B1 (en) Interface connector cover opening and shutting apparatus for mobile phone
CN216291052U (en) Combined mobile phone protective sleeve with support
CA2494163A1 (en) Hingeless mobile station
CN212696050U (en) Foldable protective shell
CN111866217A (en) Screen protection structure of folding mobile phone
KR100747458B1 (en) Mobile communication terminal using both fold type and slide type
EP1281242A2 (en) Portable mobile terminal
KR100528548B1 (en) Foldertype cellular phone which equips the display device for horizontal rotation
KR100560921B1 (en) Mobile phone with mounting means
KR20010065800A (en) Camera lens mounting device of folder type mobile phone
CN212463285U (en) Mobile phone shell with turnover type support
CN216700071U (en) Novel cell-phone shell
CN220186450U (en) Portable bracket
CN215186898U (en) Sliding type protective shell
CN215871521U (en) Mobile phone shell capable of supporting mobile phone
KR200218526Y1 (en) Display installation structure of portable phone
CN215934915U (en) Protective shell suitable for folding screen mobile phone
KR100641325B1 (en) Dual Direction Hinge and Portable Terminal having the Same
KR102291149B1 (en) Charging Cable For Mobile Device
KR200225110Y1 (en) Cover opening structure for folder type celluar phone

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant