CN117395859A - Circuit board and intelligent door lock - Google Patents
Circuit board and intelligent door lock Download PDFInfo
- Publication number
- CN117395859A CN117395859A CN202311584733.XA CN202311584733A CN117395859A CN 117395859 A CN117395859 A CN 117395859A CN 202311584733 A CN202311584733 A CN 202311584733A CN 117395859 A CN117395859 A CN 117395859A
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- Prior art keywords
- circuit board
- power inductor
- signal line
- signal
- area
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- 238000002955 isolation Methods 0.000 claims abstract description 50
- 239000000758 substrate Substances 0.000 claims abstract description 10
- 239000006247 magnetic powder Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 210000003298 dental enamel Anatomy 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
- H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/181—Printed circuits structurally associated with non-printed electric components associated with surface mounted components
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
- H01F2027/065—Mounting on printed circuit boards
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of electronic circuits, and discloses a circuit board and an intelligent door lock, wherein the circuit board comprises: a substrate provided with a wiring layer; signal lines are arranged in the wiring layer; the power inductor is arranged on the substrate; the power inductor is electrically connected with the signal line; the isolation area is positioned on the wiring layer and is arranged below the power inductor; the signal line is not arranged in the isolation region. According to the embodiment of the invention, the isolation area is arranged on the wiring layer, and when the power inductor works, the signal line is not arranged in the isolation area, so that electromagnetic energy generated by the power inductor cannot interfere the signal line in the actual working process, the signal stability of the signal line in the circuit board can be ensured, and the phenomenon of restarting and crashing is further solved.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a circuit board and an intelligent door lock.
Background
A power inductor is an inductor with a large inductance and the ability to withstand high currents. The circuit is mainly used in circuits such as power supply conversion voltage stabilization and transformation, has the functions of filtering high-frequency noise, stabilizing voltage, limiting current and the like, and is an important and indispensable component for ensuring the normal operation of the circuit.
But since the power inductance is a wound coil, the electromagnetic energy generated is large. This higher electromagnetic energy can interfere with the signal lines in the wiring layers below the power inductor, which in turn can conduct to surrounding signal lines, resulting in instability of the overall signal in the circuit board, which can lead to a device crashing or restarting.
Disclosure of Invention
In view of the above, the present invention provides a circuit board and an intelligent door lock to solve the problem that electromagnetic energy generated by a power inductor interferes with a signal line.
In a first aspect, the present invention provides a circuit board comprising:
a substrate provided with a wiring layer; signal lines are arranged in the wiring layer;
the power inductor is arranged on the substrate; the power inductor is electrically connected with the signal line;
the isolation area is positioned on the wiring layer and is arranged below the power inductor; the signal line is not arranged in the isolation region.
The beneficial effects are that: according to the embodiment of the invention, the isolation area is arranged on the wiring layer, and when the power inductor works, the signal line is not arranged in the isolation area, so that electromagnetic energy generated by the power inductor cannot interfere the signal line in the actual working process, the signal stability of the signal line in the circuit board can be ensured, and the phenomenon of restarting and crashing is further solved.
In an alternative embodiment, the signal line includes a ground line, and the isolation region is not provided with the ground line.
The beneficial effects are that: in the actual wiring process of the circuit board, the grounding wire and other signal wires are usually arranged below the power inductor, but the signal interference caused by the grounding wire is far greater than the interference caused by other signal wires when the power inductor actually works. Therefore, the embodiment of the invention can ensure the signal stability of the signal wires in the circuit board and simultaneously reduce the degree of changing the layout of the signal wires by only not arranging the grounding wires in the isolation area, thereby reducing the manufacturing cost and improving the production benefit.
In an alternative embodiment, the area of the isolation region matches the footprint of the ground line.
The beneficial effects are that: because the isolation area is arranged in the wiring layer, when the grounding wire is not arranged in the isolation area, the grounding wire can be correspondingly moved to other positions of the wiring layer, so that the overall planning of the wiring layer needs to be changed. Therefore, the area of the isolation area is matched with the occupied area of the grounding wire as much as possible, so that the isolation area occupies a smaller area as much as possible, and the whole area utilization rate of the circuit board can be improved.
In an alternative embodiment, the area of the isolation region is greater than or equal to the occupied area of the ground line.
The beneficial effects are that: because other types of signal wires still exist around the isolation area, the embodiment of the invention can ensure that the power inductor cannot influence the signal wires in the range of the isolation area by making the area of the isolation area larger than or equal to the occupied area of the grounding wire, thereby ensuring the signal stability of other signal wires in the circuit board while occupying the smaller area as much as possible, and further solving the phenomenon of restarting and crashing.
In an alternative embodiment, the area of the isolation region is 0 to 50% more than the footprint of the ground line.
In an alternative embodiment, the isolation region has a rectangular configuration.
In an alternative embodiment, the power inductor includes:
a magnetic core;
a coil wound around the magnetic core;
a multi-layer shielding layer completely covering the magnetic core and the coil; the shielding layer is composed of magnetic powder for shielding electromagnetic energy generated by the coil.
The beneficial effects are that: according to the embodiment of the invention, the electromagnetic energy generated by the power inductor can be further effectively restrained by arranging the multi-layer shielding layers, so that the magnetic leakage shielding effect can be effectively improved, the reliability of the magnetic leakage shielding of the power inductor is enhanced, and the interference of the power inductor on an external signal line is reduced. And the shielding layer adopts magnetic powder to effectively shield electromagnetic energy near the coil, so that most of magnetic flux leakage is consumed in a heat form, and the interference of power inductance on signal lines in a magnetic field interference form can be effectively reduced.
In an alternative embodiment, the magnetic core is made of ferrite material and the coil is an insulated enameled wire.
The beneficial effects are that: according to the embodiment of the invention, the magnetic core is made of ferrite material, so that the magnetic permeability of the center of the coil can be increased, the magnetic induction intensity passing through the center is enhanced, the inductance of the inductor is increased, and the electromagnetic interference generated by the power inductor on the outside is reduced. The coil is an insulated enameled wire, and good insulating performance can be provided.
In an alternative embodiment, the shielding layer is a honeycomb structure.
The beneficial effects are that: the shielding layer is arranged in a honeycomb structure. The honeycomb structure can form a cut-off waveguide structure, resonates with electromagnetic waves and inhibits electromagnetic wave leakage, and can shield inductance leakage magnetic interference and enhance heat dissipation capacity, so that the leakage magnetic shielding efficiency of the power inductor is improved more effectively, the reliability of the leakage magnetic shielding of the power inductor is further enhanced, and the interference of the power inductor on a signal line is reduced.
In a second aspect, the present invention also provides an intelligent door lock, the intelligent door lock comprising: the circuit board according to any one of the above embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a circuit board according to an embodiment of the invention.
Reference numerals illustrate:
1. a substrate; 2. a power inductor; 3. a signal line; 4. isolation regions.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention can be understood in a specific case by a worker of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
A power inductor is an inductor with a large inductance and the ability to withstand high currents. The circuit is mainly used in circuits such as power supply conversion voltage stabilization and transformation, has the functions of filtering high-frequency noise, stabilizing voltage, limiting current and the like, and is an important and indispensable component for ensuring the normal operation of the circuit. But since the power inductance is a wound coil, the electromagnetic energy generated is large. This higher electromagnetic energy can interfere with the signal lines in the wiring layers below the power inductor, which in turn can conduct to surrounding signal lines, resulting in instability of the overall signal in the circuit board, which can lead to a device crashing or restarting.
In view of the above, the present invention provides a circuit board and an intelligent door lock to solve the problem that electromagnetic energy generated by a power inductor interferes with a signal line.
An embodiment of the present invention is described below with reference to fig. 1.
According to an embodiment of the present invention, in one aspect, there is provided a circuit board including a substrate 1, a power inductor 2, and an isolation region 4.
Specifically, in the embodiment of the present invention, the substrate 1 is provided with a wiring layer in which the signal lines 3 are provided. The signal line 3 may include a power positive line, a ground line, a negative voltage data line, and a positive voltage data line. Further, a power inductor 2 is disposed on the substrate 1, and the power inductor 2 is electrically connected to the signal line 3. The isolation region 4 is located in the wiring layer, and the isolation region 4 is disposed below the power inductor 2, and the signal line 3 is not disposed in the isolation region 4, that is, the signal line 3 directly below the power inductor 2 is hollowed out. Since the isolation region 4 is not provided with the signal line 3, the signal line 3 needs to bypass other positions than the isolation region 4 in the wiring layer.
By arranging the isolation area 4 on the wiring layer, when the power inductor 2 works, the signal wire 3 is not arranged in the isolation area 4, so that electromagnetic energy generated by the power inductor 2 cannot interfere the signal wire 3 in the actual working process, the signal stability of the signal wire 3 in the circuit board can be ensured, and the phenomenon of restarting and crashing is further solved.
Further, in an alternative embodiment, the signal line 3 includes a ground line, and the isolation area 4 is not provided with the ground line, that is, the ground line directly below the power inductor 2 is hollowed out, and other types of signal lines 3 are still normally arranged.
In this way, in the actual wiring process of the circuit board, the ground wire and other signal wires 3 are usually arranged below the power inductor 2, but the signal interference caused by the ground wire is far greater than the interference caused by other signal wires 3 when the power inductor 2 actually works. Therefore, in the embodiment of the invention, the ground wire is not arranged in the isolation area 4, so that the signal stability of the signal wire 3 in the circuit board is ensured, the degree of changing the layout of the signal wire 3 is reduced, the manufacturing cost is reduced, and the production benefit is improved.
Further, in an alternative embodiment, the area of the isolation region 4 matches the footprint of the ground line.
So configured, since the isolation region 4 is disposed in the wiring layer, when there is no ground line in the isolation region 4, the ground line is correspondingly moved to other positions of the wiring layer, so that the overall layout of the wiring layer needs to be changed. Therefore, the area of the isolation area 4 is matched with the occupied area of the grounding wire as much as possible, so that the isolation area 4 occupies a smaller area as much as possible, and the whole area utilization rate of the circuit board can be improved.
Further, in an alternative embodiment, the area of the isolation area 4 is greater than or equal to the occupied area of the ground line.
By arranging the above arrangement, as other types of signal wires 3 still exist around the isolation region 4, the embodiment of the invention can ensure that the power inductor 2 cannot influence the signal wires 3 in the range of the isolation region 4 by making the area of the isolation region 4 larger than or equal to the occupied area of the ground wire, so that the signal stability of other signal wires 3 in the circuit board can be ensured while the isolation region 4 occupies a smaller area as much as possible, and the phenomenon of restarting and crashing is further solved.
Further, in an alternative embodiment, the area of the isolation region 4 is 0 to 50% more than the occupied area of the ground line. For example, 10%, 20%, 30%, 40% may be used. Of course, the present embodiment is merely to illustrate the ratio of the occupied area of the isolation region 4 to the occupied area of the ground line, but is not limited thereto, and those skilled in the art may change according to actual situations, and may have the same technical effects.
Further, in an alternative embodiment, the isolation region 4 has a rectangular structure. Of course, the present embodiment is merely to illustrate the shape of the isolation region 4, but is not limited thereto, and those skilled in the art may change the shape according to actual circumstances, and may achieve the same technical effects.
Further, in an alternative embodiment, the power inductor 2 includes a magnetic core, a coil, and a shielding layer. Specifically, the coil is wound on the magnetic core, and the multi-layer shielding layer is completely coated on the magnetic core and the coil. The shielding layer is composed of magnetic powder for shielding electromagnetic energy generated by the coil.
By arranging the plurality of shielding layers, the electromagnetic energy generated by the power inductor 2 can be further effectively restrained, so that the magnetic leakage shielding efficiency can be effectively improved, the reliability of the magnetic leakage shielding of the power inductor 2 is enhanced, and the interference of the power inductor 2 on the external signal line 3 is reduced. And the shielding layer adopts magnetic powder to effectively shield electromagnetic energy near the coil, so that most of magnetic flux leakage is consumed in a heat form, and the interference of the power inductor 2 on the signal line 3 in a magnetic field interference form can be effectively reduced.
Further, in an alternative embodiment, the magnetic core is made of ferrite material, and the coil is an insulated enameled wire.
By arranging the magnetic core as ferrite material, the embodiment of the invention can increase the magnetic permeability of the center of the coil, thereby enhancing the magnetic induction intensity passing through the center, improving the inductance of the inductor and reducing the electromagnetic interference generated outside the power inductor 2. The coil is an insulated enameled wire, and good insulating performance can be provided.
Further, in an alternative embodiment, the shielding layer is a honeycomb structure.
So configured, embodiments of the present invention provide for the shielding layer to be configured as a honeycomb structure. The honeycomb structure can form a cut-off waveguide structure, resonates with electromagnetic waves and inhibits electromagnetic wave leakage, and can shield inductance magnetic leakage interference and enhance heat dissipation capacity, so that the magnetic leakage shielding efficiency of the power inductor 2 is improved more effectively, the reliability of the magnetic leakage shielding of the power inductor 2 is further enhanced, and the interference of the power inductor 2 to the signal wire 3 is reduced.
In a second aspect, the present invention also provides an intelligent door lock, the intelligent door lock comprising: the circuit board according to any one of the above embodiments.
Further, the circuit board and the intelligent door lock can be fixedly connected or detachably connected. For the fixed connection, welding, bonding or the like may be adopted. For detachable connection, the fixing can be performed by adopting a screw hole mode, a clamping groove mode and a magnetic sheet attraction mode.
The manner of detachable connection is exemplified below. For example, the fixing plates can be additionally arranged around the inside of the intelligent door lock, the number of the fixing plates can be changed according to actual conditions by a person skilled in the art, 1, 2, 3, 4 and the like, screw holes are formed in the fixing plates, then another screw hole is formed in the circuit board at the position corresponding to the screw hole, and then screws sequentially penetrate through the screw holes in the fixing plates and the screw holes in the circuit board to connect the intelligent door lock with the circuit board. Further, when adopting buckle and draw-in groove's mode to fix, can additionally set up the buckle around intelligent lock's edge, the quantity of buckle can be changed according to actual conditions to the skilled artisan, 1, 2, 3, 4 etc. are offered again on the circuit board and can be with the draw-in groove of buckle cooperation work in the position that corresponds this buckle, then in the direct draw-in groove on the circuit board of buckle on the intelligent door lock to be connected intelligent door lock and circuit board. When the intelligent door lock is fixed in a magnetic attraction mode, magnetic sheets can be additionally arranged around the edge of the intelligent door lock, the number of the magnetic sheets can be changed according to actual conditions by a person skilled in the art, 1, 2, 3, 4 and the like, opposite magnetic sheets which can be attracted with the magnetic sheets are arranged at positions corresponding to the magnetic sheets on the circuit board, and then the magnetic sheets on the intelligent door lock are directly aligned with the opposite magnetic sheets embedded into the circuit board, so that the intelligent door lock is magnetically connected with the circuit board.
Of course, the present embodiment is merely illustrative of the manner of fixing connection and the manner of detachable connection, but is not limited thereto, and those skilled in the art can vary according to actual circumstances, and can achieve the same technical effects.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. A circuit board, comprising:
a substrate (1) provided with a wiring layer; a signal line (3) is arranged in the wiring layer;
a power inductor (2) disposed on the substrate (1); the power inductor (2) is electrically connected with the signal wire (3);
an isolation region (4) located on the wiring layer, wherein the isolation region (4) is arranged below the power inductor (2); the signal line (3) is not arranged in the isolation region (4).
2. Circuit board according to claim 1, characterized in that the signal line (3) comprises a ground line, which is not provided in the isolation region (4).
3. Circuit board according to claim 2, characterized in that the area of the insulating region (4) matches the footprint of the ground line.
4. Circuit board according to claim 2, characterized in that the area of the insulating region (4) is equal to or larger than the footprint of the ground line.
5. The circuit board according to claim 4, characterized in that the area of the insulating region (4) is 0 to 50% more than the footprint of the ground line.
6. Circuit board according to any of claims 1 to 5, characterized in that the insulating region (4) has a rectangular structure.
7. Circuit board according to any of claims 1 to 5, characterized in that the power inductance (2) comprises:
a magnetic core;
a coil wound around the magnetic core;
a multi-layer shielding layer completely covering the magnetic core and the coil; the shielding layer is composed of magnetic powder for shielding electromagnetic energy generated by the coil.
8. The circuit board of claim 7, wherein the magnetic core is made of ferrite material and the coil is an insulated wire enamel.
9. The circuit board of claim 8, wherein the shielding layer is a honeycomb structure.
10. An intelligent door lock, characterized by comprising: the circuit board of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311584733.XA CN117395859A (en) | 2023-11-24 | 2023-11-24 | Circuit board and intelligent door lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311584733.XA CN117395859A (en) | 2023-11-24 | 2023-11-24 | Circuit board and intelligent door lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117395859A true CN117395859A (en) | 2024-01-12 |
Family
ID=89463187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311584733.XA Pending CN117395859A (en) | 2023-11-24 | 2023-11-24 | Circuit board and intelligent door lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117395859A (en) |
-
2023
- 2023-11-24 CN CN202311584733.XA patent/CN117395859A/en active Pending
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