CN112864649A - Wiring board assembly, electrical box and electrical equipment - Google Patents
Wiring board assembly, electrical box and electrical equipment Download PDFInfo
- Publication number
- CN112864649A CN112864649A CN202110045068.1A CN202110045068A CN112864649A CN 112864649 A CN112864649 A CN 112864649A CN 202110045068 A CN202110045068 A CN 202110045068A CN 112864649 A CN112864649 A CN 112864649A
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- conductive
- wiring board
- piece
- normally
- terminal
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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
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/22—Bases, e.g. strip, block, panel
- H01R9/24—Terminal blocks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention provides a wiring board assembly, an electric appliance box and electric equipment. The guard plate is provided with a conductive core and a force receiving part, the conductive core and the normally-off conductive terminal are both positioned between the guard plate and the wiring board main body, the force receiving part is stressed to drive the conductive core to enter between the first conductive piece and the second conductive piece, and the first conductive piece and the second conductive piece are electrically connected through the conductive core. The restoring force of the elastic reset piece forces the conductive core to be separated from the normally-off conductive terminal. The wiring board assembly can prevent electric shock.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a wiring board assembly, an electrical box and electrical equipment.
Background
In the service cycle of the air conditioner, especially the air conditioner indoor unit, a filter screen needs to be cleaned regularly, and circuits and pipelines need to be maintained.
As shown in fig. 1, at present, two electrical apparatus box covers are usually required in an electrical apparatus box component, the two electrical apparatus box covers are an inner electrical apparatus box cover 101 and an outer electrical apparatus box cover 102, wherein the inner electrical apparatus box cover 101 and the outer electrical apparatus box cover 102 are both composed of an electrical apparatus box cover main body made of plastic parts and an electrical apparatus box shielding cover made of sheet metal parts, so as to play a role of fire prevention together with a panel 103. During assembly, the electrical box shielding cover is arranged on the electrical box cover main body through the buckle, the electrical box inner cover 101 and the electrical box outer cover 102 are sequentially covered on the box body 104 of the electrical box, the buckle is added to fix the screws, and finally the panel 103 is covered. The assembly mode has the advantages of high cost of more components, complex and inconvenient steps and low efficiency in actual production.
Disclosure of Invention
A first object of the present invention is to provide an electric shock resistant terminal board assembly.
A second object of the present invention is to provide an electrical box having the above-mentioned junction board assembly.
The third purpose of the invention is to provide an electric device with the electric box.
In order to achieve the first object, the invention provides a wiring board assembly, which comprises a wiring board main body, a guard plate and an elastic reset piece, wherein the wiring board main body is provided with normally-off conductive terminals, and the normally-off conductive terminals comprise a first conductive piece and a second conductive piece which are arranged at intervals. The guard plate is provided with a conductive core and a force receiving part, the conductive core and the normally-off conductive terminal are both positioned between the guard plate and the wiring board main body, the force receiving part is stressed to drive the conductive core to enter between the first conductive piece and the second conductive piece, and the first conductive piece and the second conductive piece are electrically connected through the conductive core. The restoring force of the elastic reset piece forces the conductive core to be separated from the normally-off conductive terminal.
According to the scheme, the wiring board assembly adopts a normally-off anti-electric shock design, and when the force receiving part of the protection plate is not subjected to external force, the protection plate enables the conductive core to be disconnected from the normally-off conductive terminal under the action of restoring force of the elastic reset piece, so that the wiring board assembly is in a power-off state. When the force of the guard plate is received and pressed by external force, the conductive core is in electric contact with the normally-off conductive terminal, and the circuit conduction is realized. Therefore, the problem of electric shock accidents caused by forgetting to turn off the power supply and the like when equipment is overhauled is solved. Simultaneously, because the setting of backplate, no matter the backplate is in the state of pushing down, still the backplate is by the state of spring jack-up, the backplate covers all the time and shields the top at the wiring board main part, plays isolated user contact binding post's effect, and contact to the interior machine power supply line terminal in avoiding the operation and cause the electric shock accident.
Preferably, the elastic restoring member is connected between the shield plate and the wiring board main body, and the conductive core and the force receiving portion are respectively provided on opposite side walls of the shield plate.
Therefore, the stability of the electric connection between the conductive core and the conductive terminal is ensured.
The wiring board main part is provided with a positioning column, the elastic reset piece is sleeved outside the positioning column, the protective plate is provided with a guide hole, and the free end of the positioning column extends into the guide hole.
Therefore, the positioning columns can simultaneously play a role in supporting the springs and guiding the guard plates.
Preferably, the wiring board main body is provided with a guide member, and the guard plate is fitted over the guide member and is reciprocally movable along an extending direction of the guide member.
Therefore, the guide piece is used for guiding the movement of the guard plate, and the conductive core can be accurately inserted between the first conductive piece and the second conductive piece.
Preferably, the wiring board main body is further provided with a limit screw, the limit screw is mounted at an end portion of the guide member, and a head portion of the limit screw protrudes in a radial direction from a peripheral wall of the guide member.
It follows that the limit screw achieves a limit of the displacement of the guard.
The wiring board body is provided with a first terminal mounting groove and a second terminal mounting groove which are oppositely arranged; the first conductive piece comprises a first wiring fixing part and a first electric connection part which are connected, the first wiring fixing part is installed in the first terminal installation groove, and the first electric connection part extends into the second terminal installation groove and extends towards one side of the protection plate; the second conductive piece comprises a second wiring fixing portion and a second electric connection portion which are connected, the second wiring fixing portion and the second electric connection portion are both located in the second terminal installation groove, the first electric connection portion extends towards one side of the protection plate, an accommodating gap is formed between the first electric connection portion and the second electric connection portion, and the conductive core is inserted into the accommodating gap.
The free end of the first electric connection part and the free end of the second electric connection part are provided with an insertion opening communicated with the accommodating gap, and the insertion opening is expanded outwards.
Therefore, the insertion opening is expanded outwards, the conductive core is guided, and the conductive core is conveniently inserted into the accommodating gap.
One preferred scheme is that the number of the normally-open conductive terminals is more than two, and the number of the conductive cores is the same as that of the normally-open conductive terminals; a plurality of normally-open conductive terminals arranged along the length of the terminal block body; the first conductive member and the second conductive member are arranged along a width direction of the wiring board body.
Therefore, the number of the normally-off conductive terminals can be changed as required.
Preferably, the first conductive member and the second conductive member are both in the shape of a sheet.
Preferably, the wiring board main body is further provided with a fastener penetrating through the wiring board main body in the thickness direction, and the guard plate is provided with an operation through hole at a position corresponding to the fastener.
Therefore, the arrangement of the operation through holes is convenient for a user to detach the fastener for fixing the wiring board assembly, and the screwdriver can rapidly detach the fastener through the operation through holes so as to detach the wiring board assembly.
In a preferred embodiment, the wiring board main body is further provided with normally-on conductive terminals, the normally-on conductive terminals are located between the guard plate and the wiring board main body, and the normally-on conductive terminals and the normally-off conductive terminals are arranged along the length direction of the wiring board main body.
In order to achieve the second object, the invention provides an electrical box, which comprises the wiring board assembly.
In order to achieve the third object, the invention provides an electrical apparatus, which includes the electrical box.
One preferred scheme is that electrical equipment includes casing and panel, and the casing is equipped with the casing opening, and the panel articulates at the casing opening part, and the electrical apparatus box is installed in the casing, and the panel is provided with the briquetting, and the briquetting is with power receiving unit butt.
It follows that the press block is used to apply pressure to the force receiving portion when the panels are snapped together, thereby bringing the conductive core into electrical contact with the normally-off conductive terminals.
The electrical box further comprises a box body and a box cover, wherein an end wall is arranged on one side, facing the opening of the shell, of the box body, and the wiring board assembly is installed in a containing cavity defined by the end wall and the box cover. Be provided with the electrical apparatus box installation cavity in the casing, the electrical apparatus box is installed in the electrical apparatus box installation cavity, and the electrical apparatus box installation cavity is provided with casing operation mouth at the casing opening part. The panel is provided with the sealing, and the sealing is cyclic annular and protrudes from the internal surface of panel, and the briquetting is located the inboard of sealing, and the panel covers casing operation mouth, sealing and casing operation mouth interference fit.
Therefore, the sealing part on the panel is in sealing fit with the sealing port on the shell to form a closed structure, so that the traditional outer cover of the electrical box is omitted, the number of parts of the whole machine is reduced, the assembly efficiency is improved, and the cost is reduced.
The sealing part and the guard plate are both made of fireproof and insulating materials through injection molding.
Therefore, the protective plate and the sealing part are both made of fireproof materials in an injection molding mode, fire inside the electric appliance box is prevented from spreading to the outside, and the fireproof performance is improved.
Drawings
Fig. 1 is an exploded view of an embodiment of a conventional air conditioner.
Fig. 2 is a perspective view of an embodiment of an air conditioner of the present invention.
Fig. 3 is an exploded view of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a partial sectional view of an embodiment of an air conditioner of the present invention.
Fig. 5 is a structural view of a panel in an embodiment of an air conditioner according to the present invention.
Fig. 6 is an exploded view showing a terminal plate assembly in an embodiment of an air conditioner according to the present invention.
Fig. 7 is a sectional view showing a closed state of a panel in an embodiment of an air conditioner according to the present invention.
Fig. 8 is a partial enlarged view at a in fig. 7.
Fig. 9 is a sectional view showing an opened state of a panel in an embodiment of an air conditioner according to the present invention.
Fig. 10 is a partial enlarged view at B in fig. 9.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Referring to fig. 2 and 3, the electric device of the present embodiment is an air conditioner. The air conditioner includes a case, a panel 13, and an appliance box 14. The casing includes bottom shell 11 and panel body 12, and panel body 12 is equipped with casing opening 121, and panel 13 is installed in casing opening 121 department, and the top of panel 13 is articulated through hinge 133 with panel body 12, and the bottom of panel 13 passes through buckle 134 block with panel body 12, and the loose-leaf can rotate with certain angle on panel body 12 when making panel 13 open or close, convenient dismantlement and installation.
Referring to fig. 4 to 7, an electrical box installation cavity 122 is provided in the panel body 12, the electrical box 14 is installed in the electrical box installation cavity 122, and a housing operation opening 123 is provided in the housing opening 121 of the electrical box installation cavity 122. The panel 13 is provided with a sealing portion 131, the sealing portion 131 is annular and protrudes from the inner surface of the panel 13, the panel 13 covers the shell operation opening 123, and the sealing portion 131 is in interference fit with the shell operation opening 123 to seal the shell operation opening 123 on the panel body 12, so that the electrical box 14 is located in a closed space to ensure good sealing and fire-proof performance.
Referring to fig. 3 and 7, the electrical box 14 includes a box body 2, a box cover 3, and a terminal block assembly 4, wherein the box body 2 is provided with an end wall 21 on a side facing the housing opening 121, and the terminal block assembly 4 is installed in a receiving chamber 31 defined by the end wall 21 and the box cover 3.
Referring to fig. 6 to 10, the junction block assembly 4 includes a junction block main body 41, a protector plate 42, and an elastic restoring member 43. The sealing portion 131 and the protector plate 42 are each formed by injection molding of a material such as BMC that is fireproof and insulating.
The terminal block body 41 is provided with three normally-off conductive terminals 44, one normally-on conductive terminal 45, a guide 46, a limit screw 47, a fastener 48, and a positioning post 49. The fastening members 48 are screws, the fastening members 48 are connected to the end wall 21 of the box body 2 after passing through the terminal block main body 41 in the thickness direction T, so that the terminal board assembly 4 is fixed to the box body 2, and the guard plate 42 is provided with operation through holes 421 at positions corresponding to the fastening members 48.
The guide 46 extends in the thickness direction T of the wiring board main body 41. The guard plate 42 is fitted over the guide member 46 and is reciprocally movable along the extending direction of the guide member 46, and a stopper screw 47 is mounted on the end of the guide member 46, and the head of the stopper screw 47 is projected in the radial direction from the peripheral wall of the guide member 46 to restrict the displacement of the guard plate 42. The back of the guard plate 42 is provided with three conductive cores 422, the normally-off conductive terminals 44 and the normally-on conductive terminals 45 are all located between the guard plate 42 and the wiring board main body 41, the three normally-off conductive terminals 44 and the normally-on conductive terminals 45 are arranged along the length direction L of the wiring board main body 41, and one conductive core 422 and one normally-off conductive terminal 44 are arranged oppositely.
The normally-open conductive terminal 44 includes first and second conductive members 441, 442 each having a plate shape and arranged at an interval in the width direction W of the terminal block body 41, and the first and second conductive members 441, 442 each having a substantially L-shape and are fixed to the terminal block body 41 with screws 440.
The wiring board main body 41 is provided with four sets of terminal mounting groove sets including a first terminal mounting groove 411 and a second terminal mounting groove 412 which are oppositely arranged along the width direction W of the wiring board main body 41, the four sets of terminal mounting groove sets are arranged along the length direction L, three normally-off conductive terminals 44 and normally-on conductive terminals 45 are respectively arranged in the four sets of terminal mounting groove sets,
the first conductive member 441 includes a first wiring fixing portion 4411 and a first electrical connection portion 4412 connected, the first wiring fixing portion 4411 is fixed in the first terminal mounting groove 411, the first electrical connection portion 4412 extends into the second terminal mounting groove 412 and extends toward the protector plate 42 side along the thickness direction T of the terminal block main body 41, the second conductive member includes a second wiring fixing portion 4421 and a second electrical connection portion 4422 connected, both the second wiring fixing portion 4421 and the second electrical connection portion 4422 are located in the second terminal mounting groove 412, and the second electrical connection portion 4422 extends toward the protector plate 42 side along the thickness direction T of the terminal block main body 41. An accommodating gap 443 is formed between the first electric connecting portion 4412 and the second electric connecting portion 4422, the minimum distance between the first electric connecting portion 4412 and the second electric connecting portion 4422 is greater than the creepage distance of the overall power supply voltage so as to ensure that the first conductive piece 441 and the second conductive piece 442 are in a disconnected state, an insertion opening 444 communicated with the accommodating gap 443 is arranged between the free end of the first electric connecting portion 4412 and the free end of the second electric connecting portion 4422, the insertion opening 444 is in an outward expansion shape, and the conductive core 422 can be inserted into the accommodating gap 443 from the insertion opening 444 so as to realize the electric connection of the first conductive piece 441 and the second conductive piece 442. As shown in fig. 6, a live line mark L is engraved near each normally-open conductive terminal 44 on the surface of the terminal block body 41, marks L1, L2, and L3 are sequentially engraved along the length direction of the terminal block body 41, and a neutral line mark N is engraved near the normally-open conductive terminal 45 on the surface of the terminal block body 41.
The shield plate 42 is L-shaped, and includes a main body portion 420 and a bent portion 425, the bent portion 425 is bent from a side edge of the main body portion 420 toward a direction away from the panel 13, and the main body portion 420 and the bent portion 425 completely shield the terminal block main body 41 and each of the conductive terminals thereon on the side of the housing operation opening 123. Further, the force receiving portion 423 is provided on the front surface of the main body portion 420, the pressing piece 132 is provided on the panel 13, the pressing piece 132 is located inside the sealing portion 131, and when the panel 13 is closed, the pressing piece 132 abuts against the force receiving portion 423 to apply pressure to the force receiving portion 423. The elastic restoring member 43 is disposed between the body portion 420 of the protector plate 42 and the terminal block body 41, and the restoring force of the elastic restoring member 43 forces the protector plate 42 away from the terminal block body 41 to separate the conductive core 422 from the normally-off conductive terminals 44. Elastic reset piece 43 is a spring, positioning column 49 is arranged in parallel with guiding piece 46, spring 43 is sleeved outside positioning column 49, guard plate 42 is provided with guiding hole 424, and free end 491 of positioning column 49 extends into guiding hole 424.
As shown in fig. 7 and 8, in the after-sale installation process of the whole machine, power supply lines are connected to two sides of the wiring board assembly 4, then the panel 13 is installed in place and fastened and closed, the pressing block 132 on the panel 13 applies pressure to the protection plate 42, the protection plate 42 moves and drives the conductive core 422 to be inserted into the corresponding normally-off conductive terminal 44 on the wiring board assembly 4, so that the whole wiring board assembly 4 is conducted, the power supply circuit of the whole machine is conducted, and the whole machine which runs normally is achieved. Because the panel 13 keeps the installation state and is connected by the hinge shaft 133 and the buckle 134 to ensure the reliability of closing, the whole machine can normally operate by supplying power to the inside as long as the panel 13 is in the installation and closing state.
When after-sale maintenance is needed, the panel 13 is necessarily disassembled or opened, as shown in fig. 9 and 10, once the panel 13 is opened, the pressing block 132 of the panel 13 does not press the protection plate 42 any more, the protection plate 42 is jacked up by the spring 43 and moves to the side far away from the wiring board main body 41, the protection plate 42 moves to further drive the conductive core 422 to move and keep away from the normally-off conductive terminal 44, and finally the conductive core 422 is pulled out from the normally-off conductive terminal 44, so that all the live wire conduction paths of the wiring board assembly 4 are disconnected, the power supply inside the whole machine is disconnected, even if an operator forgets to disconnect the power supply of the whole indoor air conditioner, the safety accident that a human body gets an electric shock due to contacting internal components does not occur, and the electric shock injury is caused.
In addition, no matter the guard plate 42 is in a state of being pressed down by the pressing block 132 when being covered by the panel 13, or the guard plate 42 is opened by the panel 13 and is jacked up by the spring 43, the screw 440 for fixing each conductive piece and all conductive terminals for supplying power to the wiring in the wiring board assembly 4 can be effectively covered, and when an operator carries out cleaning maintenance or looks over components in the electrical box 14, the operator cannot touch a strong-current wiring terminal for supplying power to the whole machine, so that the safety of the operator is further ensured, and electric shock accidents are avoided during daily cleaning maintenance and inspection. When the wiring is required to be connected to each conductive terminal of the wiring board assembly 4, the limiting screw 47 on the protective plate 42 is detached, so that the power connection operation can be quickly realized.
The air conditioner of the embodiment is an air conditioner complete machine powered by three-phase electricity, so that the live wire has three pairs of normally-off conductive terminals which correspond to each other one by one and are matched with three conductive cores for conducting the live wire. That is, the number of the normally-open conductive terminals can also be one or more than two. In addition, the wiring board assembly can also be provided with no normally-on conductive terminals, and all the conductive terminals are set to be normally-off conductive terminals. The elastic resetting pieces can also be made of elastic materials such as rubber, and the number of the elastic resetting pieces can be changed according to requirements. The limiting screw can also be replaced by a buckle to limit the guard plate. Other complex structures may be used to effect reciprocation of the shield. The patch panel assembly may also be used on other electrical devices. The above-described modifications also achieve the object of the present invention.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, not limitations, and various changes and modifications may be made by those skilled in the art, without departing from the spirit and scope of the invention, and any changes, equivalents, improvements, etc. made within the spirit and scope of the present invention are intended to be embraced therein.
Claims (16)
1. A terminal plate assembly, comprising:
the wiring board comprises a wiring board body, wherein normally-off conductive terminals are arranged on the wiring board body and comprise first conductive pieces and second conductive pieces which are arranged at intervals;
the protection plate is provided with a conductive core and a force receiving part, the conductive core and the normally-off conductive terminal are both positioned between the protection plate and the wiring board main body, the force receiving part is stressed to drive the conductive core to enter between the first conductive piece and the second conductive piece, and the first conductive piece and the second conductive piece are electrically connected through the conductive core;
the elastic resetting piece is used for forcing the conductive core to be separated from the normally-off conductive terminal by the restoring force of the elastic resetting piece.
2. The patch panel assembly of claim 1, wherein:
the elastic reset piece is connected between the guard plate and the wiring board main body, and the conductive core and the force receiving part are respectively arranged on two opposite side walls of the guard plate.
3. The patch panel assembly of claim 2, wherein:
the wiring board main part still is provided with the reference column, elasticity resets and establishes outside the reference column, the guiding hole has been seted up to the backplate, the free end of reference column stretches into in the guiding hole.
4. A terminal block assembly according to any one of claims 1 to 3, wherein:
the wiring board main part is provided with the guide piece, the backplate cover is established on the guide piece and can be along the extending direction reciprocating motion of guide piece.
5. The patch panel assembly of claim 4, wherein:
the wiring board main body is further provided with a limiting screw, the limiting screw is installed at the end part of the guide piece, and the head of the limiting screw protrudes from the peripheral wall of the guide piece in the radial direction.
6. A terminal block assembly according to any one of claims 1 to 3, wherein:
the wiring board main body is provided with a first terminal mounting groove and a second terminal mounting groove which are oppositely arranged;
the first conductive piece comprises a first wiring fixing part and a first electric connection part which are connected, the first wiring fixing part is installed in the first terminal installation groove, and the first electric connection part extends into the second terminal installation groove and extends towards one side of the protection plate;
the second is electrically conductive including the second wiring fixed part and the second electric connection portion that are connected, the second wiring fixed part with the second electric connection portion all is located second terminal mounting groove, first electric connection portion orientation backplate one side is extended, first electric connection portion with form between the second electric connection portion and hold the clearance, electrically conductive core inserts in holding the clearance.
7. The patch panel assembly of claim 6, wherein:
an insertion opening communicated with the accommodating gap is formed between the free end of the first electric connection part and the free end of the second electric connection part, and the insertion opening is expanded outwards.
8. A terminal block assembly according to any one of claims 1 to 3, wherein:
the number of the normally-open conductive terminals is more than two, and the number of the conductive cores is the same as that of the normally-open conductive terminals;
a plurality of normally-open conductive terminals disposed along a length of the terminal block body;
the first conductive member and the second conductive member are arranged along a width direction of the wiring board body.
9. A terminal block assembly according to any one of claims 1 to 3, wherein:
the first conductive piece and the second conductive piece are both in a sheet shape.
10. A terminal block assembly according to any one of claims 1 to 3, wherein:
the wiring board main body is further provided with a fastening piece, the fastening piece penetrates through the wiring board main body in the thickness direction, and an operation through hole is formed in the position, corresponding to the fastening piece, on the protection plate.
11. A terminal block assembly according to any one of claims 1 to 3, wherein:
the wiring board main part is further provided with normally-on conductive terminals, the normally-on conductive terminals are located between the protective plate and the wiring board main part, and the normally-on conductive terminals and the normally-off conductive terminals are arranged along the length direction of the wiring board main part.
12. An electrical box comprising the terminal block assembly of any one of claims 1 to 11.
13. Electrical apparatus, characterized in that it comprises an electrical box according to claim 12.
14. The electrical device of claim 13, wherein:
the electrical equipment comprises a shell and a panel, wherein the shell is provided with a shell opening, the panel is hinged to the shell opening, the electrical box is installed in the shell, and a pressing block is arranged on the panel and abutted to the force receiving part.
15. The electrical device of claim 14, wherein:
the electric appliance box also comprises a box body and a box cover, wherein one side of the box body, which faces the opening of the shell, is provided with an end wall, and the wiring board assembly is arranged in an accommodating cavity which is defined by the end wall and the box cover;
an electrical box installation cavity is arranged in the shell, the electrical box is installed in the electrical box installation cavity, and a shell operation opening is formed in the shell opening of the electrical box installation cavity;
the panel is provided with the sealing, the sealing is cyclic annular and certainly the internal surface protrusion of panel, the briquetting is located the inboard of sealing, the panel covers casing operation mouth, the sealing with casing operation mouth interference fit.
16. The electrical device of claim 15, wherein:
the sealing part and the guard plate are both formed by injection molding of fireproof and insulating materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045068.1A CN112864649B (en) | 2021-01-13 | 2021-01-13 | Wiring board assembly, electrical box and electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110045068.1A CN112864649B (en) | 2021-01-13 | 2021-01-13 | Wiring board assembly, electrical box and electrical equipment |
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| CN112864649A true CN112864649A (en) | 2021-05-28 |
| CN112864649B CN112864649B (en) | 2022-01-21 |
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| CN112072605A (en) * | 2020-09-14 | 2020-12-11 | 武汉铁路职业技术学院 | Novel communication cable junction box |
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