CN114784561A - Screw fastening type high-voltage connector capable of being opened in overturning manner - Google Patents
Screw fastening type high-voltage connector capable of being opened in overturning manner Download PDFInfo
- Publication number
- CN114784561A CN114784561A CN202210363319.5A CN202210363319A CN114784561A CN 114784561 A CN114784561 A CN 114784561A CN 202210363319 A CN202210363319 A CN 202210363319A CN 114784561 A CN114784561 A CN 114784561A
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- Prior art keywords
- voltage
- locking
- socket
- cover
- base
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/62—Means for facilitating engagement or disengagement of coupling parts or for holding them in engagement
- H01R13/629—Additional means for facilitating engagement or disengagement of coupling parts, e.g. aligning or guiding means, levers, gas pressure electrical locking indicators, manufacturing tolerances
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/701—Structural association with built-in electrical component with built-in switch the switch being actuated by an accessory, e.g. cover, locking member
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
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- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses a screw fastening type high-voltage connector with an overturned cover, which comprises a high-voltage plug and a high-voltage socket, wherein the high-voltage plug is inserted into the high-voltage socket and is electrically connected with the high-voltage socket; the high-voltage socket is also provided with a high-voltage interlocking loop, the high-voltage interlocking loop further comprises a base, a spring, a pressure lever, two contact pins and a connecting piece, the base is installed on the high-voltage socket, the pressure lever is arranged on the high-voltage socket in a sliding mode and is positioned above the base, the spring is connected with the base and the pressure lever, and the contact pins and the connecting piece are respectively arranged on the base and the pressure lever; when the high-voltage socket is connected with the high-voltage plug, the upper end of the pressure rod is in contact with the mounting opening cover, and the mounting opening cover is used for controlling the pressure rod to vertically move. The invention adopts a structure of overturning the cover to open and is matched with a secondary lock structure, so that the operation is convenient and the reliability is high. The high-voltage interlocking loop is provided with a spring, and under the action of elasticity, the high-voltage interlocking loop is automatically disconnected only by opening the mounting cover cap, so that the high-voltage power supply is disconnected.
Description
Technical Field
The invention relates to the field of connectors, in particular to a screw fastening type high-voltage connector with a turnover cover.
Background
In recent years, with the development of times, the living conditions of people are improved, the popularization of automobiles promotes the rapid development of human socioeconomic and modern civilization, severe energy and environmental problems are caused, and energy conservation and environmental protection become one of the subjects of automobile technical development. The automobile technology progress in the world is promoted, and the social construction and application of the electric automobile are accelerated. The development and popularization of the pure electric vehicle are more and more emphasized, the new energy bus or the logistics vehicle has obvious development advantages, and the new energy bus or the logistics vehicle is guided and supported vigorously and also promotes the technical development of the electric vehicle.
When a high-voltage wire of an electric vehicle is connected or disconnected, an electric arc is generated, and people and equipment around the electric vehicle may be injured. In the process of connecting, disconnecting or disconnecting the high-voltage lead, if the high-voltage lead or the plug is provided with high voltage electricity, an operator can be in danger of electric shock.
Disclosure of Invention
Aiming at overcoming the defects in the prior art, the invention mainly aims to overcome the defects in the prior art and discloses a screw fastening type high-voltage connector with an overturned cover, which comprises a high-voltage plug and a high-voltage socket, wherein the high-voltage plug is inserted into the high-voltage socket and is electrically connected with the high-voltage socket; the high-voltage socket is provided with a slot and a first connecting seat arranged in the slot, and the first connecting seat is connected with a high-voltage wire; the high-voltage plug comprises a plug body and an installation opening cover, the installation opening cover is rotatably arranged on the plug body, a connecting cavity is arranged in the plug body, a second connecting seat is arranged in the connecting cavity, and the second connecting seat is connected with a high-voltage lead; the high-voltage socket is inserted into the slot;
the high-voltage socket is also provided with a high-voltage interlocking loop, the high-voltage interlocking loop further comprises a base, a spring, a pressure lever, two contact pins and a connecting piece, the base is installed on the high-voltage socket, the pressure lever is arranged on the high-voltage socket in a sliding mode and is located above the base, the spring is connected with the base and the pressure lever, and the contact pins and the connecting piece are respectively arranged on the base and the pressure lever; when the high-voltage socket is connected with the high-voltage plug, the upper end of the pressing rod is in contact with the mounting opening cover, and the mounting opening cover is used for controlling the pressing rod to move vertically.
Furthermore, the first connecting seat and the second connecting seat are fixed through screws.
Furthermore, a guide hole is formed in the high-voltage socket, a limiting portion is arranged at the upper end of the guide hole, the base is arranged at the lower end of the guide hole, the spring and the pressing rod are arranged in the guide hole, and a clamping edge matched with the limiting portion is arranged on the pressing rod.
Further, set up the guide arm on the base, the lower extreme of depression bar be concave establish with guide arm complex guide slot, the contact pin sets up on the guide arm, the connection piece sets up in the guide slot.
Further, the guide rod is always positioned in the guide groove.
Further, the installation opening cover and the plug body are fixed through a secondary locking structure.
Furthermore, the secondary locking structure comprises a lock catch arranged on the plug body and a locking structure arranged on the mounting opening cover, the locking structure comprises a mounting cavity, a hook arranged in the mounting cavity and a locking block arranged in the mounting cavity in a sliding manner, a hooking part, a first locking part and a unlocking part are arranged on the hook, and the hooking part is hooked on the lock catch during primary locking; when the locking is locked for the second time, the second locking part of the locking block is positioned between the inner wall of the mounting cavity and the first locking part; when the secondary lock is unlocked, the second locking part is positioned between the inner wall of the mounting cavity and the unlocking part.
Further, the lower extreme of couple sets up pulls the portion, just pull the portion and extend to outside the installation cavity.
Furthermore, the locking piece is provided with sliding blocks at intervals, and the mounting port cover is provided with sliding grooves matched with the sliding blocks at corresponding positions.
Furthermore, a first stop block is arranged in the installation cavity, a second stop block is arranged on the locking block, and when the secondary locking is carried out, the first stop block stops the second stop block from moving upwards.
The invention has the following beneficial effects:
the invention adopts a structure of turning over the cover and matching with a secondary lock structure, has convenient operation, can complete locking only by pressing one button, and has high reliability after locking. The high-voltage interlocking loop is provided with a spring, and under the action of elasticity, the high-voltage interlocking loop is automatically disconnected only by opening the mounting cover cap, so that the high-voltage power supply is disconnected. So as to prevent the high-voltage wire harness from generating electric arc to cause damage when being connected. And the hot-line work of an operator can be prevented in the connection process, the disconnection process or after the disconnection of the high-voltage wire harness.
Drawings
Fig. 1 is a schematic perspective view of a screw-fastened high-voltage connector with a flip-open cover according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
FIG. 5 is an enlarged view of C in FIG. 4;
FIG. 6 is a schematic view of the connection structure of the high voltage connector when the secondary lock of the secondary lock structure is unlocked;
fig. 7 and 8 are schematic views of the internal structure of the mounting port cover of the screw-fastened high-voltage connector with a flip-open cover according to the present invention when opened;
FIG. 9 is an enlarged view of D in FIG. 8;
fig. 10 is a schematic perspective view of an installation port cover of a screw-fastened high-voltage connector with a flip-open cover according to the present invention when opened;
FIG. 11 is a schematic view of the locking block;
FIG. 12 is a schematic view of the structure of the installation flap;
the reference numbers are as follows:
1. the high-voltage plug comprises a high-voltage plug body, 2, a high-voltage socket body, 11, a plug body, 12, an installation opening cover, 13, a second connection seat, 21, a slot, 22, a first connection seat, 23, a guide hole, 24, a limiting part, 31, a base, 32, a spring, 33, a pressure lever, 34, a contact pin, 35, a connection sheet, 41, a lock catch, 42, an installation cavity, 43, a hook, 44, a locking block, 121, a sliding groove, 311, a guide rod, 331, a clamping edge, 332, a guide groove, 351, a connection body, 352, a connection part, 421, a first stopper, 431, a hooking part, 432, a first locking part, 433, an unlocking part, 434, a moving part, 441, a second locking part, 442, a sliding block, 443, a second stopper, 444 and a handle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A screw thread fastening type high-voltage connector with a turnover cover is disclosed, as shown in figures 1-12, and comprises a high-voltage plug 1 and a high-voltage socket 2, wherein the high-voltage plug 1 and the high-voltage socket 2 are respectively connected with high-voltage wires, and after the high-voltage plug 1 is inserted into the high-voltage socket 2, the connection of the high-voltage wires at two ends is completed. In particular, the method comprises the following steps of,
the high-voltage socket 2 is provided with a slot 21 and a first connecting seat 22 arranged in the slot 21, and the first connecting seat 22 is connected with a high-voltage wire; high voltage plug 1 includes plug body 11 and installation flap 12, and installation flap 12 rotates and sets up on plug body 11, sets up the connection chamber in the plug body 11, connects the intracavity and sets up second connecting seat 13, and high voltage conductor is connected to second connecting seat 13, and when high voltage conductor connects, high voltage plug 1 inserts in high voltage socket 2's slot 21, and first connecting seat 22 is connected with second connecting seat 13, accomplishes the connection of high voltage conductor. Wherein, the first connecting seat 22 and the second connecting seat 13 are fixed by screws.
In order to prevent electric arc generation and live working of workers during connection or disconnection, a high-voltage interlocking loop is further arranged on the high-voltage socket 2 and further comprises a base 31, a spring 32, a pressure lever 33, two contact pins 34 and a connecting piece 35, the base 31 is installed on the high-voltage socket 2, the pressure lever 33 is arranged on the high-voltage socket 2 in a sliding mode, the pressure lever 33 is located above the base 31, the spring 32 is connected with the base 31 and the pressure lever 33, and the contact pins 34 and the connecting piece 35 are arranged on the base 31 and the pressure lever 33 respectively; the two contact pins 34 are connected through the connecting sheet 35 by driving the pressure lever 33 to move downwards, so that the conduction of the high-voltage interlocking loop is completed; when the pressing rod 33 loses the external force, the pressing rod 33 is moved upwards by the restoring force of the spring 32, and the connecting piece 35 is disconnected with the contact pin 34. In this embodiment, the pressing lever 33 is controlled to be pressed down by the mounting flap 12. Specifically, after the high-voltage plug 1 is inserted into the slot 21 of the high-voltage socket 2, the pressure lever 33 passes through and protrudes out of the mounting cavity; when the mounting port cover 12 is turned over, the pressing rod 33 is pushed to move downwards; when the mounting port cover 12 reaches the closed position, the pressing lever 33 is always pressed against the mounting port cover 12 by the restoring force of the spring 32.
In the above embodiment, as shown in fig. 1 to 12, the high voltage socket 2 is provided with the guide hole 23 for guiding the up and down movement of the pressing rod 33 while guiding the compression of the spring 32. Specifically, the base 31 is disposed at the lower end of the guide hole 23, the upper end of the guide hole 23 is provided with the limiting portion 24, the spring 32 and the pressing rod 33 are disposed in the guide hole 23, the pressing rod 33 is provided with a clamping edge 331 engaged with the limiting portion 24, and the upper limit position of the pressing rod 33 moving upwards is limited by the engagement of the limiting portion 24 and the clamping edge 331. Preferably, the locking edge 331 is matched with the inner diameter of the guide hole 23, the inner diameter of the limiting portion 24 is matched with the pressing rod 33, and the pressing rod 33 is guided to stably move vertically through the mutual matching of the above structures.
In one embodiment, as shown in fig. 1 to 12, a guide rod 311 is disposed on the base 31, a guide groove 332 engaged with the guide rod 311 is recessed at a lower end of the pressing rod 33, the pin 34 is disposed on the guide rod 311, and the connecting piece 35 is disposed in the guide groove 332, and the connecting piece 35 is guided to move downward by engaging with the guide rod 311 through the guide groove 332, so as to ensure a relative position between the connecting piece 35 and the pin 34, and ensure that the connecting piece 35 can be smoothly connected with the pin 34. Preferably, the guide rod 311 is always located in the guide groove 332.
In one embodiment, as shown in fig. 7-9, the connecting piece 35 includes a connecting body 351 and connecting portions 352 respectively disposed at two sides of the connecting body 351, wherein the connecting portions 352 are formed by two contact pieces disposed opposite to each other and contacting each other, and the lower ends of the two contact pieces are opened in an inverted "V" shape. The "V" shaped opening serves to increase the entrance of pin 34 to facilitate insertion of the pin between the two contact pads and thereby complete the connection of pin 34 to contact pad 35.
In one embodiment, as shown in fig. 1-12, the mounting flap 12 is secured to the plug body 11 by a secondary locking structure 4.
The secondary locking structure comprises a lock catch 41 arranged on the plug body 11 and a locking structure arranged on the installation opening cover 12, the locking structure comprises an installation cavity 42, a hook 43 arranged in the installation cavity 42 and a locking block 44 arranged in the installation cavity 42 in a sliding mode, a hooking part 431, a first locking part 432 and a unlocking part 433 are arranged on the hook 43, and the hooking part 431 is hooked on the lock catch 41 when the secondary locking structure is locked once. When locking is performed for the second time, the second locking part 441 of the locking block 44 is located between the inner wall of the mounting cavity 42 and the first locking part 432; when the secondary lock is unlocked, the second locking portion 441 is located between the inner wall of the mounting cavity 42 and the unlocking portion 433. Specifically, the gap between the first locking portion 432 of the hook 43 and the inner wall of the mounting cavity 42 is smaller than the gap between the unlocking portion 433 of the hook 43 and the inner wall of the mounting cavity 42, the thickness of the second locking portion 441 is matched with the gap between the first locking portion 432 of the hook 43 and the inner wall of the mounting cavity 42, and when the second locking portion 441 is inserted between the first locking portion 432 of the hook 43 and the inner wall of the mounting cavity 42, the hook 43 cannot be deformed outwards, so that the hook 43 is ensured to be hooked on the latch 41 all the time. When the secondary lock is unlocked, the locking block 44 only needs to be moved upwards, so that the second unlocking part 441 is moved to a position between the unlocking part 433 and the inner wall of the mounting cavity 42, and the hook 43 has enough space to deform outwards and unhook from the lock catch 41.
In the above embodiment, as shown in fig. 1 to 12, the lower end of the hook 43 is provided with the pulling portion 434, and the pulling portion 434 extends out of the mounting cavity 42. The operator can control the outward deformation of the hook 43 and the separation of the latch 41 by the pulling part 434.
In one embodiment, as shown in fig. 1-12, the locking block 44 is provided with sliding blocks 442 at intervals, and the mounting cover 12 is provided with sliding grooves 121 at corresponding positions for cooperating with the sliding blocks 442. Through the cooperation of the sliding grooves 121 and the sliding blocks 442, and the guidance of the locking blocks 44 by the mounting cavities 42, the stable vertical movement of the locking blocks 44 is guided at the same time.
In one embodiment, as shown in FIGS. 1-12, a first stop 421 is provided in cavity 42 and a second stop 443 is provided on lock block 44; the first stopper 421 and the second stopper 443 function in that, when the secondary lock is locked, the first stopper 421 blocks the second stopper 443 from moving upward, so as to ensure the reliability of the secondary lock; at this time, the first stopper 421 is positioned below the second stopper 443. When the first stopper 421 is located above the second stopper 443, the locking piece 44 is prevented from moving downward from the unlocked position to the locked position. Wherein, a handle 444 is arranged above the locking block 44, and the locking block 44 is controlled by the handle to move up and down; at the same time, the handle 44 also serves as a limit to determine the lower limit position of the downward movement of the locking block 44. In this embodiment, in order to facilitate unlocking and locking of the locking block 44, a slope is provided on each of the first stopper 421 and the second stopper 443.
When the invention is used: as shown in the figures 1-12 of the drawings,
during installation, the high-voltage plug 1 is inserted into the high-voltage socket 2, the secondary lock structure is unlocked, the installation opening cover 12 is turned over, the connection cavity is opened, the first connection seat 22 and the second connection seat 13 are screwed and fixed through screws, and connection of two sections of high-voltage wires is completed; at the moment, the high-voltage interlocking loop is not switched on temporarily, and a high-voltage power supply is not switched on the high-voltage wire; then the installation cover cap 12 is turned over, the connecting cavity is closed, and the installation cover cap 12 and the plug body 11 are locked through a secondary locking structure. Due to the closing of the mounting opening cover 12, the pressure lever 33 drives the connecting sheet 35 to move downwards, the contact pin 34 is inserted into the connecting sheet 35 and then conducted through the connecting sheet 35, so that the high-voltage interlocking loop is conducted, and a signal is sent to the controller to control the opening of the high-voltage power supply.
During disassembly, the secondary lock structure is unlocked, the mounting opening cover 12 is opened, the screw is screwed off, and then the high-voltage plug 1 is pulled off to complete disassembly. In the process, the installation opening cover 12 is opened, the pressure rod 33 moves upwards under the restoring force of the spring 32, the connecting sheet 35 is separated from the contact pin 34, the high-voltage interlocking loop is disconnected, the controller disconnects the high-voltage power supply, and at the moment, the first connecting seat 22 and the second connecting seat 13 are free of high-voltage electricity, so that the safety of operators is guaranteed.
The locking and unlocking of the secondary lock structure is explained below:
when locking, the mounting opening cover 12 is turned over to a closed position, and the hook 43 is hooked on the lock catch 41 to complete one-time locking; the locking piece 44 is then pushed to move downward so that the second locking portion 441 is located between the first locking portion 432 and the inner wall of the mounting cavity 42, and the first stopper 421 is located below the second stopper 443, thereby completing the secondary locking.
During unlocking, the handle 444 drives the locking block 44 to move upwards, so that the second locking part 441 moves to a position between the unlocking part 433 and the inner wall of the mounting cavity 42, and at the moment, the first stop 421 is positioned above the second stop 443, and the unlocking of the secondary lock is completed; the pulling portion 434 is then driven outward to unlock the hooking portion 431 from the lock 41, completing a lock unlocking. So far, the secondary lock structure is completely unlocked, and only the installation opening cover 12 needs to be turned over and opened.
The above are merely preferred embodiments of the present invention, and are not intended to limit the scope of the invention; it is intended that the following claims be interpreted as including all such alterations, modifications, and equivalents as fall within the true spirit and scope of the invention.
Claims (10)
1. A screw fastening type high-voltage connector with an overturned cover comprises a high-voltage plug and a high-voltage socket, wherein the high-voltage plug is inserted into the high-voltage socket and is electrically connected with the high-voltage socket; the high-voltage socket is characterized in that a slot and a first connecting seat arranged in the slot are arranged on the high-voltage socket, and the first connecting seat is connected with a high-voltage wire; the high-voltage plug comprises a plug body and an installation opening cover, the installation opening cover is rotatably arranged on the plug body, a connecting cavity is arranged in the plug body, a second connecting seat is arranged in the connecting cavity, and the second connecting seat is connected with a high-voltage lead; the high-voltage socket is inserted into the slot;
the high-voltage socket is also provided with a high-voltage interlocking loop, the high-voltage interlocking loop further comprises a base, a spring, a pressure lever, two contact pins and a connecting piece, the base is installed on the high-voltage socket, the pressure lever is arranged on the high-voltage socket in a sliding mode and is positioned above the base, the spring is connected with the base and the pressure lever, and the contact pins and the connecting piece are respectively arranged on the base and the pressure lever; when the high-voltage socket is connected with the high-voltage plug, the upper end of the pressing rod is in contact with the mounting opening cover, and the mounting opening cover is used for controlling the pressing rod to move vertically.
2. The screw-fastened high-voltage connector for a flip-open lid according to claim 1, wherein said first connecting seat and said second connecting seat are fixed by screws.
3. The screw-fastened high-voltage connector with an inverted cover as claimed in claim 1, wherein a guide hole is provided on the high-voltage socket, a stopper is provided at an upper end of the guide hole, the base is provided at a lower end of the guide hole, the spring and the press lever are provided in the guide hole, and a locking edge engaged with the stopper is provided on the press lever.
4. The screw-fastening type high-voltage connector with an overturned cover according to claim 1, wherein a guide rod is arranged on the base, a guide groove matched with the guide rod is concavely arranged at the lower end of the pressure lever, the contact pin is arranged on the guide rod, and the connecting piece is arranged in the guide groove.
5. The screw-fastened high-voltage connector for flip-top lids as claimed in claim 4, wherein the guide bar is always located in the guide groove.
6. The flip-open screw-fastened high-voltage connector according to claim 1, wherein the mounting port cover is fixed to the plug body by a secondary lock structure.
7. The screw-fastening type high-voltage connector with an overturned cover according to claim 6, wherein the secondary locking structure comprises a lock catch arranged on the plug body and a locking structure arranged on the mounting opening cover, the locking structure comprises a mounting cavity, a hook arranged in the mounting cavity and a locking block arranged in the mounting cavity in a sliding manner, a hooking part, a first locking part and an unlocking part are arranged on the hook, and the hooking part is hooked on the lock catch during primary locking; when the locking is locked for the second time, the second locking part of the locking block is positioned between the inner wall of the mounting cavity and the first locking part; when the secondary lock is unlocked, the second locking part is positioned between the inner wall of the mounting cavity and the unlocking part.
8. A screw-fastened high-voltage connector with a flip-open lid according to claim 7, wherein a pulling portion is provided at a lower end of the hook, and the pulling portion extends out of the mounting cavity.
9. The screw fastening type high-voltage connector with an overturned cover as claimed in claim 7, wherein the locking block is provided with sliding blocks at intervals, and the mounting port cover is provided with sliding grooves matched with the sliding blocks at corresponding positions.
10. A flip-open screw-on high-voltage connector as claimed in claim 7, wherein a first stopper is provided in said mounting cavity and a second stopper is provided on said locking piece, said first stopper blocking said second stopper from moving upward when locked for a second time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210363319.5A CN114784561A (en) | 2022-04-07 | 2022-04-07 | Screw fastening type high-voltage connector capable of being opened in overturning manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210363319.5A CN114784561A (en) | 2022-04-07 | 2022-04-07 | Screw fastening type high-voltage connector capable of being opened in overturning manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114784561A true CN114784561A (en) | 2022-07-22 |
Family
ID=82428032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210363319.5A Pending CN114784561A (en) | 2022-04-07 | 2022-04-07 | Screw fastening type high-voltage connector capable of being opened in overturning manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114784561A (en) |
-
2022
- 2022-04-07 CN CN202210363319.5A patent/CN114784561A/en active Pending
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