CN116946947A - Cable well lid hoisting accessory - Google Patents
Cable well lid hoisting accessory Download PDFInfo
- Publication number
- CN116946947A CN116946947A CN202310906204.0A CN202310906204A CN116946947A CN 116946947 A CN116946947 A CN 116946947A CN 202310906204 A CN202310906204 A CN 202310906204A CN 116946947 A CN116946947 A CN 116946947A
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- China
- Prior art keywords
- cross beam
- bracket
- limiting
- handle
- lifting device
- 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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- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
- B66F19/005—Lifting devices for manhole covers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Abstract
The invention relates to the technical field of well lid lifting, in particular to a cable well lid lifting device, which comprises a bracket and a lifting device; the hoisting device comprises a handle rod, a cross beam, a hook, a bearing wheel, a brake device and a connecting component; one end of the bracket is provided with a groove, the handle rod is inserted in the groove, and one end of the handle rod, which is far away from the bracket, is provided with a handle; the cross beam is horizontally and fixedly arranged at one end of the bracket far away from the handle rod, and the cross beam has a circular cross section; the bearing wheel is arranged below one side of the bracket, which is far away from the handle rod, and the distance from the cross beam to the bearing wheel is smaller than the distance from the handle to the bearing wheel; the hook is arranged on the cross beam and used for hanging the cable well cover; the brake device is arranged on one side of the bearing force and is used for preventing the bearing wheel from rolling; the connecting component is arranged between the support and the handle rod, and the support is connected with the handle rod through the connecting component, so that the device is convenient to transport and can be used for easily taking out the cable manhole cover.
Description
Technical Field
The invention relates to the technical field of well lid lifting, in particular to a cable well lid lifting device.
Background
When the cable line is inspected and overhauled, as no special cable well lid opening tool is needed, a plurality of people are required to move the cable well lid away, serious potential safety hazards exist when the well lid is opened, the safety of operators is seriously threatened, and meanwhile, the labor and financial resources are wasted; the operation time is long, and the working efficiency is low; when the cable well cover is pried open by the crow bar, the cable well cover is easily pried out.
Chinese patent CN204251291U discloses a cable well lid hoisting accessory, including portal, two guide rails that are parallel to each other and the fore-and-aft direction set up, four wheels that set up respectively on four angles of portal and set up in two guide rails, the lever of switching on the portal, install in lever one end and be used for hooking the couple of cable well lid.
Above-mentioned scheme is although can take out cable well lid, but inconvenient transportation, and the structure is complicated, still needs to assemble the device before taking out the well lid, because the time of the complicated equipment of structure also can be longer, and is inconvenient for remove when using, just hardly carries out daily work in the less space of environment.
Disclosure of Invention
To above-mentioned problem, provide a cable well lid hoisting accessory, in the transportation, handle and support are in split structure and are convenient for transport, insert the recess of support with the one end of handle pole in the use, and with handle pole and leg joint through coupling assembling, because the bottom of support is provided with the bearing wheel, when needing thrust unit to remove, will hold the handle and promote the support can, later lift the one end that the handle pole was provided with the handle, the handle pole drives the support and starts to rotate with the bearing wheel as the centre of a circle, the crossbeam that sets up in support one end drives the couple and stretches into in the cable well lid, later activate brake equipment, the bearing wheel can't rotate, and press down the handle along vertical direction, the couple that sets up on the crossbeam lifts up the cable well lid, the hoist and mount to the cable well lid has been realized, make the device both convenient transportation can also take out the cable well lid easily.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a cable manhole cover lifting device comprises a bracket and a lifting device; the hoisting device comprises a handle rod, a cross beam, a hook, a bearing wheel, a brake device and a connecting component; one end of the bracket is provided with a groove, the handle rod is inserted in the groove, and one end of the handle rod, which is far away from the bracket, is provided with a handle; the cross beam is horizontally and fixedly arranged at one end of the bracket far away from the handle rod, and the cross beam has a circular cross section; the bearing wheel is arranged below one side of the bracket, which is far away from the handle rod, and the distance from the cross beam to the bearing wheel is smaller than the distance from the handle to the bearing wheel; the hook is arranged on the cross beam and used for hanging the cable well cover; the brake device is arranged on one side of the bearing force and is used for preventing the bearing wheel from rolling; the connecting component is arranged between the bracket and the handle rod, and the bracket is connected with the handle rod through the connecting component.
Preferably, the hoisting device further comprises a connecting component, wherein the connecting component is used for connecting the rotating rod, the clamping piece and the hanging piece; one end of the rotating rod is hinged with the upper part of the bracket; the clamping piece is fixedly arranged on one side of the handle rod, which is close to the bracket; the hanging piece is arranged on one side of the hinged part of the rotating rod and the bracket, and the hanging piece can be matched with the clamping piece in a clamping way.
Preferably, the braking device comprises a disc brake and a grip; the grip is arranged on the handle; the disc brake is arranged on one side of the bearing wheel, and the handle can control the disc brake to brake the bearing wheel.
Preferably, the hoisting device further comprises a limiting assembly, wherein the limiting assembly comprises a limiting ring, a limiting block and a locking assembly; the two limiting rings are symmetrically arranged on two sides of the cross beam respectively, and are in threaded fit with the cross beam; the limiting block is fixedly arranged on one side, close to the end part of the cross beam, of the limiting ring; the locking subassembly sets up in the stopper one side of keeping away from the spacing ring, and the locking subassembly can restrict spacing ring rotation.
Preferably, the locking assembly comprises a locking rod and a concave block; the limiting block is provided with a through groove along the axis of the cross beam, and one end of the locking rod is hinged with one side, far away from the limiting ring, of the limiting block; the concave block is fixedly arranged at the end part of the cross beam, and the locking rod is matched with the concave block in a clamping way.
Preferably, the locking assembly further comprises a magnet; the magnet sets up in the stopper one side of keeping away from the spacing ring, and the dead pole of lock is kept away from dead pole of lock and stopper articulated one end can adsorb with the magnet.
Preferably, the limiting component further comprises a fixed block, an extending lug and an elastic rope; the fixed block is arranged in the middle of the cross beam; the two extending lugs are symmetrically and fixedly arranged on two sides of the fixed block relative to the axis of the cross beam; the two ends of the elastic rope are respectively and fixedly connected with the extension lug and the limiting block.
Preferably, the limiting assembly further comprises a screw; the screw penetrates through the fixing block and is in threaded fit with the cross beam.
Preferably, the hook is of a bent structure.
Preferably, the hooks are T-shaped.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the handle, the cross beam, the hooks, the bearing wheels, the brake device and the connecting assembly are arranged, when in transportation, the handle and the support are in a split structure, when in use, one end of the handle is inserted into the groove of the support, the handle is connected with the support through the connecting assembly, as the bearing wheels are arranged at the bottom of the support, when the pushing device is required to move, the handle is held by hand and the support is pushed, then one end of the handle is lifted, the handle drives the support to start rotating by taking the bearing wheels as the circle centers, the cross beam arranged at one end of the support drives the hooks to be inserted into the cable manhole cover, then the brake device is activated, the bearing wheels cannot rotate, the handles are pressed downwards along the vertical direction, and the cable manhole cover is lifted by the hooks arranged on the cross beam, so that the cable manhole cover is lifted, and the cable manhole cover is convenient to transport and can be taken out easily.
Drawings
FIG. 1 is a schematic perspective view of a cable manhole cover lifting device;
FIG. 2 is an enlarged schematic view of a portion of the cable manhole cover lifting apparatus of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of a portion of the cable manhole cover lifting apparatus at B in FIG. 1;
FIG. 4 is an enlarged schematic view of a portion of the cable manhole cover lifting apparatus at C in FIG. 1;
fig. 5 is a schematic perspective view of a cable manhole cover lifting device;
FIG. 6 is a partially enlarged schematic illustration of the cable manhole cover lifting apparatus at D in FIG. 5;
fig. 7 is an enlarged partial schematic view of the cable manhole cover lifting apparatus at E in fig. 5.
The reference numerals in the figures are:
1-a bracket;
2-a hoisting device;
21-a handle bar;
22-a cross beam;
23-hooking;
24-bearing wheels;
25-a brake device; 251-disc brake; 252-grip;
a 26-connection assembly; 261-turning a lever; 262-clamping piece; 263-a hitch;
27-a limiting assembly; 271-stop collar; 272-limiting blocks; 273-locking component; 2731-locking the rod; 2732-concave block; 274-a fixed block; 2741-screws; 275-extending ears; 276-elastic cord.
Detailed Description
The invention will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the invention and the specific objects and functions achieved.
Referring to fig. 1, 2, 5 and 7: a cable manhole cover lifting device comprises a bracket 1 and a lifting device 2; the hoisting device 2 comprises a handle rod 21, a cross beam 22, a hook 23, a bearing wheel 24, a brake device 25 and a connecting component 26; one end of the bracket 1 is provided with a groove, the handle rod 21 is inserted into the groove, and one end of the handle rod 21 far away from the bracket 1 is provided with a handle; the cross beam 22 is horizontally and fixedly arranged at one end of the bracket 1 far away from the handle rod 21, and the cross beam 22 has a circular cross section; the bearing wheel 24 is arranged below one side of the bracket 1 far away from the handle bar 21, and the distance from the cross beam 22 to the bearing wheel 24 is smaller than the distance from the handle to the bearing wheel 24; the hook 23 is arranged on the cross beam 22, and the hook 23 is used for hanging the cable manhole cover; the brake device 25 is arranged on one side of the bearing force, and the brake device 25 is used for preventing the bearing wheel 24 from rolling; the connection assembly 26 is provided between the bracket 1 and the handle bar 21, and the bracket 1 and the handle bar 21 are connected by the connection assembly 26.
The bracket 1 and the handle bar 21 are separated in the initial state, so that the bracket 1 and the handle bar 21 are convenient to transport, when the bracket 1 and the handle bar 21 are transported to the vicinity of a construction site, the bracket 1 and the handle bar 21 can be removed, then the handle bar 21 is inserted into a groove of the bracket 1 and connected through a connecting component 26 arranged between the handle bar 21 and the bracket 1, the handle bar 21 can be installed on the bracket 1, a bearing wheel 24 is arranged below the bracket 1, a user can hold a handle arranged on the handle bar 21 to push the bracket 1, at the moment, the bearing wheel 24 arranged below the bracket 1 rolls, when the user pushes the bracket 1 to one side of a cable cover, a brake device 25 is activated, the bearing wheel 24 is locked, the bearing wheel 24 cannot rotate, then one end of the handle bar 21 provided with the handle is lifted, the handle rod 21 drives the bracket 1 to rotate around the hinge joint of the bracket 1 and the bearing wheel 24, at the moment, one end of the handle rod 21 provided with the handle is lifted, one end of the bracket 1 provided with the cross beam 22 falls down, the cross beam 22 is provided with a hook 23, the hook 23 penetrates through a through hole in the cable shaft cover, then one end of the handle rod 21 provided with the handle is pressed downwards, one end of the handle rod 21 provided with the handle is gradually lowered, the cross beam 22 provided with one end of the bracket 1 is gradually lifted, meanwhile, the hook 23 arranged on the cross beam is lifted along with the cross beam 22, the hook 23 is contacted with the lower part of the cable shaft cover in the lifting process and drives the cable shaft cover to lift together, so that the requirement of lifting the cable shaft cover is realized, if after construction is finished, the lifted cable shaft cover is put down in the same way, then the connecting component 26 is unlocked, the handle rod 21 and the bracket 1 are detached, the device is convenient to transport and can be used for easily taking out the cable manhole cover.
Referring to fig. 1 and 4: the hoisting device 2 further comprises a connecting assembly 26, wherein the connecting assembly 26 is used for connecting the rotating rod 261, the clamping piece 262 and the hanging piece 263; one end of the rotating rod 261 is hinged with the upper part of the bracket 1; the clamping piece 262 is fixedly arranged on one side of the handle rod 21, which is close to the bracket 1; the hanging piece 263 is arranged on one side of the hinge joint of the rotating rod 261 and the bracket 1, and the hanging piece 263 can be in clamping fit with the clamping piece 262.
When the handle bar 21 and the bracket 1 are installed, one end of the handle bar 21 needs to be inserted into the groove of the bracket 1, then the hanging piece 263 is pulled, so that the hanging piece 263 is hung on the clamping piece 262, then the rotating bar 261 is rotated, the hanging piece 263 on one side of the rotating bar 261, which is far away from the hinge position of the rotating bar 261 and the bracket 1, can be driven to move by the rotating bar 261, when the length direction of the rotating bar 261 is parallel to the length direction of the handle bar 21, the clamping piece 262 is completely clamped with the hanging piece 263, and at the moment, the handle bar 21 cannot be separated from the bracket 1.
Referring to fig. 1, 6 and 7: the brake device 25 comprises a disc brake 251 and a grip 252; grip 252 is provided on the handle; the disc brake 251 is disposed on one side of the load-bearing wheel 24, and the grip 252 can control the disc brake 251 to brake the load-bearing wheel 24.
After the support 1 moves to one side of the cable well cover, a user holds the grip 252, and at the moment, the disc brake 251 can brake the bearing wheel 24, so that the bearing wheel 24 does not rotate any more, and the hook 23 is guaranteed to drive the well cover to lift more stably.
Referring to fig. 1 and 2: the lifting device 2 further comprises a limiting assembly 27, wherein the limiting assembly 27 comprises a limiting ring 271, a limiting block 272 and a locking assembly 273; the two limiting rings 271 are symmetrically arranged on two sides of the cross beam 22 respectively, and the limiting rings 271 are in threaded fit with the cross beam 22; the limiting block 272 is fixedly arranged on one side of the limiting ring 271 near the end of the cross beam 22; the locking component 273 is disposed on one side of the limiting block 272 away from the limiting ring 271, and the locking component 273 can limit the rotation of the limiting ring 271.
If no limiting component 27 is arranged, the situation that the hook 23 slides from the cross beam 22 can occur in the using process, and in the transportation process, if the hook 23 is not limited, the situation that the hook 23 slides from the cross beam 22 can still occur after jolting for a long time, after the limiting ring 271 is arranged, the hook 23 can be blocked by the limiting ring 271, so that the hook 23 cannot slide from two ends of the cross beam 22, and because the limiting ring 271 and the cross beam 22 are in threaded fit, the limiting block 272 is locked by the locking component 273 through the arrangement of the limiting block 272 and the locking component 273, so that the limiting block 272 cannot rotate, and the fact that the limiting ring 271 cannot loose in the long-time using process is ensured.
Referring to fig. 1 and 2: the lock assembly 273 includes a lock rod 2731 and a female block 2732; the limiting block 272 is provided with a through groove along the axis of the cross beam 22, and one end of the locking rod 2731 is hinged with one side of the limiting block 272 away from the limiting ring 271; the concave block 2732 is fixedly arranged at the end part of the cross beam 22, and the locking rod 2731 is in clamping fit with the concave block 2732.
Because the limiting ring 271 is in threaded fit with the cross beam 22, after long-time use, the limiting ring 271 can rotate relative to the cross beam 22, so that looseness occurs between the limiting ring 271 and the cross beam 22, and after the locking rod 2731 and the concave block 2732 are arranged, the limiting ring 271 is firstly required to be screwed into one end of the cross beam 22, and then the locking rod 2731 arranged on the limiting block 272 is rotated, so that the locking rod is matched with the concave block 2732 in a clamping way, and the clamping of the limiting block 272 is completed.
Referring to fig. 2: the locking assembly 273 also includes a magnet; the magnet is arranged on one side of the limiting block 272 away from the limiting ring 271, and one end of the locking rod 2731, which is far away from the locking rod 2731 and hinged with the limiting block 272, can be adsorbed with the magnet.
One end of the locking rod 2731 can be adsorbed through the magnet, so that the locking rod 2731 is prevented from loosening after being clamped with the concave block 2732.
Referring to fig. 1 and 3: the spacing assembly 27 further includes a fixed block 274, an extension lug 275 and an elastic cord 276; the fixed block 274 is provided in the middle of the cross beam 22; the number of the extending lugs 275 is two, and the extending lugs 275 are fixedly arranged on two sides of the fixing block 274 symmetrically with respect to the axis of the cross beam 22; both ends of the elastic rope 276 are fixedly connected with the extending lug 275 and the limiting block 272 respectively.
By providing the elastic cord 276 such that the threads on the retainer ring 271 can be closely attached to the threads on the cross beam 22, the abrasion phenomenon that the threads on the retainer ring 271 and the threads on the cross beam 22 collide with each other during transportation is prevented.
Referring to fig. 1 and 3: the spacing assembly 27 also includes a screw 2741; screws 2741 extend through the fixed block 274 and threadably engage the cross beam 22.
The fixing block 274 is provided with a through hole, and when the fixing block 274 is installed, a screw 2741 is inserted through the through hole in the fixing block 274, and the screw 2741 is screwed, so that the screw 2741 is in threaded fit with the cross beam 22.
Referring to fig. 1 and 2: the hook 23 is of a bent structure.
The first embodiment of the hook 23 is provided, the hook 23 is of a bent structure, and the bent hook 23 can hook and drive the cable manhole cover to lift together in the lifting process of the cross beam 22.
Referring to fig. 1 and 2: the hook 23 has a T-shaped structure.
The second embodiment of the hook 23 is provided, the hook 23 is of a bending structure, and in the ascending process of the cross beam 22, the hook 23 can clamp the cable well cover and drive the well cover to ascend together.
The foregoing examples merely illustrate one or more embodiments of the invention, which are described in greater detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A cable well lid lifting device comprises a bracket (1) and a lifting device (2);
the lifting device is characterized in that the lifting device (2) comprises a handle rod (21), a cross beam (22), a hook (23), a bearing wheel (24), a brake device (25) and a connecting component (26);
one end of the bracket (1) is provided with a groove, a handle rod (21) is inserted into the groove, and one end of the handle rod (21) far away from the bracket (1) is provided with a handle;
the cross beam (22) is horizontally and fixedly arranged at one end of the bracket (1) far away from the handle rod (21), and the cross section of the cross beam (22) is of a circular structure;
the bearing wheel (24) is arranged below one side of the bracket (1) far away from the handle rod (21), and the distance from the cross beam (22) to the bearing wheel (24) is smaller than the distance from the handle to the bearing wheel (24);
the hook (23) is arranged on the cross beam (22), and the hook (23) is used for hanging the cable well cover;
the brake device (25) is arranged on one side of the bearing force, and the brake device (25) is used for preventing the bearing wheel (24) from rolling;
the connecting component (26) is arranged between the bracket (1) and the handle rod (21), and the bracket (1) is connected with the handle rod (21) through the connecting component (26).
2. The cable manhole cover lifting device according to claim 1, wherein the lifting device (2) further comprises a connecting assembly (26), and the connecting assembly (26) is used for connecting the rotating rod (261), the clamping piece (262) and the hanging piece (263);
one end of the rotating rod (261) is hinged with the upper part of the bracket (1);
the clamping piece (262) is fixedly arranged on one side of the handle rod (21) close to the bracket (1);
the hanging piece (263) is arranged on one side of the hinge joint of the rotating rod (261) and the bracket (1), and the hanging piece (263) can be in clamping fit with the clamping piece (262).
3. A cable manhole cover lifting device according to claim 1, characterized in that the brake means (25) comprises a disc brake (251) and a grip (252);
the grip (252) is arranged on the handle;
the disc brake (251) is arranged on one side of the bearing wheel (24), and the grip (252) can control the disc brake (251) to brake the bearing wheel (24).
4. The cable manhole cover lifting device according to claim 1, wherein the lifting device (2) further comprises a limiting component (27), and the limiting component (27) comprises a limiting ring (271), a limiting block (272) and a locking component (273);
the two limiting rings (271) are symmetrically arranged on two sides of the cross beam (22), and the limiting rings (271) are in threaded fit with the cross beam (22);
the limiting block (272) is fixedly arranged on one side of the limiting ring (271) close to the end part of the cross beam (22);
the locking assembly (273) is arranged on one side, far away from the limiting ring (271), of the limiting block (272), and the locking assembly (273) can limit the limiting ring (271) to rotate.
5. The cable manhole cover lifting device according to claim 4, wherein the locking assembly (273) comprises a locking rod (2731) and a concave block (2732);
a through groove is formed in the limiting block (272) along the axis of the cross beam (22), and one end of the locking rod (2731) is hinged with one side, far away from the limiting ring (271), of the limiting block (272);
the concave block (2732) is fixedly arranged at the end part of the cross beam (22), and the locking rod (2731) is in clamping fit with the concave block (2732).
6. The cable manhole cover lifting apparatus of claim 5, wherein the locking assembly (273) further comprises a magnet;
the magnet is arranged on one side of the limiting block (272) far away from the limiting ring (271), and one end of the locking rod (2731) far away from the locking rod (2731) and hinged with the limiting block (272) can be adsorbed with the magnet.
7. The cable manhole cover lifting device of claim 6, wherein the limiting assembly (27) further comprises a fixed block (274), an extension lug (275) and an elastic rope (276);
the fixed block (274) is arranged in the middle of the beam (22);
two extending lugs (275) are arranged, and the extending lugs (275) are symmetrically and fixedly arranged at two sides of the fixing block (274) around the axis of the cross beam (22);
both ends of the elastic rope (276) are respectively and fixedly connected with the extending lug (275) and the limiting block (272).
8. The cable manhole cover lifting device according to claim 7, wherein the limiting assembly (27) further comprises a screw (2741);
a screw (2741) penetrates through the fixed block (274) and is in threaded fit with the cross beam (22).
9. A cable manhole cover lifting device according to claim 1, characterized in that the hooks (23) are of a bent structure.
10. A cable manhole cover lifting device according to claim 1, characterized in that the hooks (23) are of a t-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310906204.0A CN116946947A (en) | 2023-07-24 | 2023-07-24 | Cable well lid hoisting accessory |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310906204.0A CN116946947A (en) | 2023-07-24 | 2023-07-24 | Cable well lid hoisting accessory |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116946947A true CN116946947A (en) | 2023-10-27 |
Family
ID=88457844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310906204.0A Pending CN116946947A (en) | 2023-07-24 | 2023-07-24 | Cable well lid hoisting accessory |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116946947A (en) |
-
2023
- 2023-07-24 CN CN202310906204.0A patent/CN116946947A/en active Pending
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