Intelligent door lock communication antenna assembly and intelligent door lock

Abstract

The utility model provides an intelligent door lock communication antenna assembly and an intelligent door lock, the intelligent door lock communication antenna assembly comprises an antenna substrate, the antenna substrate is provided with a first antenna, a second antenna and a third antenna, the first antenna and the third antenna are arranged on one side of the antenna substrate, the second antenna is arranged on the other side of the antenna substrate, and the third antenna is arranged on the other side of the antenna substrate. The third antenna is an IFA antenna, and the minimum distance between the third antenna and the first antenna is 8.67 mm. The intelligent door lock communication antenna assembly has the advantages that the intelligent door lock communication antenna assembly is reasonable in structure and compact in layout, three antennas are integrated in a limited space, the antenna windowing number and the windowing area of an intelligent door lock are reduced under the condition that the antenna performance is guaranteed, the structural strength of the intelligent door lock is guaranteed, and the service life of the intelligent door lock is prolonged. The assembly difficulty is reduced, and the production and development cost is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of smart door locks, in particular to a smart door lock communication antenna component and a smart door lock. Background Art

[0002] With the rise of the Internet of Things (IoT), a wide variety of IoT products have emerged, including an increasing number of built-in antennas. Furthermore, most smart door locks have all-metal frames, posing a significant challenge to antenna design. Traditional antenna design involves designing multiple antennas in multiple locations.

[0003] The traditional antenna design requires reserving antenna radiation windows in multiple locations on the metal lock. For three or more antennas, the more windows the metal shell has, the greater the impact on the structural strength of the shell. This is not allowed in many scenarios and increases the difficulty and cost of assembly.

[0004] Improvements to the existing technology are needed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a smart door lock communication antenna assembly and a smart door lock with a reasonable structure and the ability to effectively improve the antenna space utilization.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a smart door lock communication antenna assembly, including an antenna substrate, on which a first antenna, a second antenna and a third antenna are provided, the first antenna and the third antenna are arranged on one side of the antenna substrate, the second antenna is arranged on the other side of the antenna substrate, the third antenna is an IFA antenna, and the minimum distance between the third antenna and the first antenna is 8.67 mm.

[0007] Furthermore, the first antenna includes a first signal radiating arm and a first ground radiating arm, the first signal radiating arm is provided with a first antenna signal feed, and the first ground radiating arm is provided with a first antenna ground feed; the second antenna includes a second signal radiating arm and a second ground radiating arm, the second signal radiating arm is provided with a second antenna signal feed, and the second ground radiating arm is provided with a first antenna ground feed, and the first signal radiating arm, the first ground radiating arm, the second signal radiating arm and the second ground radiating arm are arranged in an X-shaped cross-distribution.

[0008] Furthermore, the first signal radiation arm is in a first irregular hexagonal shape; and the first ground radiation arm is in a second irregular hexagonal shape.

[0009] Furthermore, the first signal radiating arm is provided with a circular hole and a first slot, the first slot extends toward the interior of the first signal radiating arm and is connected to the circular hole; the first ground radiating arm is provided with a second slot, the second slot extends toward the interior of the first ground radiating arm.

[0010] Furthermore, the circular hole is provided with a third slot on one side away from the first slot.

[0011] Furthermore, the second signal radiation arm is consistent with the first signal radiation arm in shape and size; the second ground radiation arm is consistent with the first ground radiation arm in shape and size.

[0012] Furthermore, the third antenna includes a third signal radiation arm and a third ground radiation arm, the third signal radiation arm is sequentially connected to the first signal radiation part, the second signal radiation part, the third signal radiation part and the fourth signal radiation part; the third ground radiation arm is sequentially connected to the first ground radiation part and the second ground radiation part; the third signal radiation arm and the third ground radiation arm are connected through a bending part.

[0013] Furthermore, the third signal radiating arm is provided with a third antenna signal feed; and the third ground radiating arm is provided with a third antenna ground feed.

[0014] Furthermore, the length of the antenna substrate is 60.8 mm, and the width of the antenna substrate is 32 mm.

[0015] The utility model also relates to a smart door lock, comprising the smart door lock communication antenna assembly as described in any one of the above items.

[0016] The beneficial effects of the present utility model are: providing a smart door lock communication antenna assembly with a reasonable structure and compact layout, which integrates three antennas in a limited space. While ensuring antenna performance, it reduces the number and area of ​​antenna windows of the smart door lock, ensures the structural strength of the smart door lock, reduces the difficulty of assembly, and optimizes production and development costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific structure of the utility model is described in detail below with reference to the accompanying drawings:

[0018] Figure 1 This is a perspective view of the overall structure of the intelligent door lock communication antenna assembly of the present invention;

[0019] Figure 2 This is a front structural diagram of the intelligent door lock communication antenna assembly of the present utility model;

[0020] Figure 3 This is a schematic diagram of the back structure of the smart door lock communication antenna assembly of the present utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the first antenna of the present invention;

[0022] Figure 5 This is a schematic diagram of the overall structure of the third antenna of the present invention;

[0023] Figure 6 This is a test index diagram of the first antenna RL (S11) and the second antenna RL (S33) and isolation of the present invention;

[0024] Figure 7 This is a test index diagram of the first antenna RL (S33) and the third antenna RL (S11) and isolation of the present invention;

[0025] Figure 8 The second antenna RL (S33) and the third antenna RL (S11) of the present invention are connected to the Isolation

[0026] Figure 9 This is a schematic diagram of the structure of the smart door lock of the present utility model;

[0027] 1-antenna substrate;

[0028] 2- First antenna;

[0029] 21-first signal radiation arm; 211-first antenna signal feed; 212-first slot; 213-circular hole; 214-third slot;

[0030] 22-first ground radiation arm; 221-first antenna ground feed; 222-second slot;

[0031] 3-second antenna; 31-second signal radiation arm; 32-second ground radiation arm;

[0032] 4- Third antenna;

[0033] 41 - third signal radiating arm; 411 - third antenna signal feeder; 412 - first signal radiating portion; 413 - second signal radiating portion; 414 - third signal radiating portion; 415 - fourth signal radiating portion;

[0034] 42 - third ground radiation arm; 421 - third antenna ground feed; 422 - first ground radiation portion; 423 - second ground radiation portion; 424 - bending portion;

[0035] 100-main structure; 101-antenna window. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0042] Example

[0043] See also Figures 1 to 8 This embodiment provides a smart door lock communication antenna assembly, including an antenna substrate 1, on which a first antenna 2, a second antenna 3, and a third antenna 4 are provided. The first antenna 2 and the third antenna 4 are arranged on one side of the antenna substrate 1, and the second antenna 3 is arranged on the other side of the antenna substrate 1. The third antenna 4 is an IFA antenna, and the minimum spacing between the third antenna 4 and the first antenna 2 is 8.67 mm.

[0044] In this embodiment, the antenna assembly operates at a frequency of 2.4 GHz. The first antenna 2, second antenna 3, and third antenna 4 are integrated onto an antenna substrate 1. The first antenna 2 and third antenna 4 are located on the same surface of the antenna substrate 1, while the second antenna 3 is located on the other surface. To prevent interference between the first antenna 2 and third antenna 4, the minimum spacing between the third antenna 4 and the first antenna 2 is 8.67 mm. The optimized layout of the three antennas reduces the total footprint of the three antennas to 60.8 x 32 mm, ensuring good RF performance despite the compact size of the antenna assembly.

[0045] Furthermore, the first antenna 2 includes a first signal radiating arm 21 and a first ground radiating arm 22, the first signal radiating arm 21 is provided with a first antenna signal feed 211, and the first ground radiating arm 22 is provided with a first antenna ground feed 221; the second antenna 3 includes a second signal radiating arm 31 and a second ground radiating arm 32, the second signal radiating arm 31 is provided with a second antenna signal feed, and the second ground radiating arm 32 is provided with a first antenna ground feed, and the first signal radiating arm 21, the first ground radiating arm 22, the second signal radiating arm 31 and the second ground radiating arm 32 are arranged in an X-shaped cross arrangement.

[0046] In this embodiment, the first signal radiating arm 21 and the first ground radiating arm 22 of the first antenna 2 are diagonally arranged in a rectangular area, and the second signal radiating arm 31 and the second ground radiating arm 32 of the second antenna 3 are diagonally arranged in a corresponding rectangular area on the back. The first signal radiating arm 21, the first ground radiating arm 22, the second signal radiating arm 31 and the second ground radiating arm 32 are cross-distributed in an X shape in space, forming a cross-polarized approximate dipole antenna, which saves the antenna space while ensuring that the RF performance indicators remain unchanged.

[0047] Furthermore, the first signal radiation arm 21 is in the shape of a first irregular hexagon; and the first ground radiation arm 22 is in the shape of a second irregular hexagon.

[0048] In this embodiment, the first signal radiating arm 21 includes a first side of the signal radiating arm, a second side of the signal radiating arm, a third side of the signal radiating arm, a fourth side of the signal radiating arm, a fifth side of the signal radiating arm, and a sixth side of the signal radiating arm, which are sequentially connected in a clockwise direction. The included angle between the first side of the signal radiating arm and the second side of the signal radiating arm is 119°, the included angle between the second side of the signal radiating arm and the third side of the signal radiating arm is 151°, the included angle between the third side of the signal radiating arm and the fourth side of the signal radiating arm is 130°, the included angle between the fourth side of the signal radiating arm and the fifth side of the signal radiating arm is 90°, the included angle between the fifth side of the signal radiating arm and the sixth side of the signal radiating arm is 105°, and the included angle between the sixth side of the signal radiating arm and the first side of the signal radiating arm is 125°.

[0049] The first ground radiation arm 22 includes a first side of the ground radiation arm, a second side of the ground radiation arm, a third side of the ground radiation arm, a fourth side of the ground radiation arm, a fifth side of the ground radiation arm and a sixth side of the ground radiation arm, which are connected in sequence in a clockwise direction, wherein the angle between the first side of the ground radiation arm and the second side of the ground radiation arm is 115°, the angle between the second side of the ground radiation arm and the third side of the ground radiation arm is 155°, the angle between the third side of the ground radiation arm and the fourth side of the ground radiation arm is 130°, the angle between the fourth side of the ground radiation arm and the fifth side of the ground radiation arm is 90°, the angle between the fifth side of the ground radiation arm and the sixth side of the ground radiation arm is 103°, and the angle between the sixth side of the ground radiation arm and the first side of the ground radiation arm is 127°.

[0050] The first side of the signal radiation arm is located on a side of the first signal radiation arm 21 close to the first ground radiation arm 22, the first side of the ground radiation arm is located on a side of the first ground radiation arm 22 close to the first signal radiation arm 21, the first side of the signal radiation arm and the first side of the ground radiation arm are parallel to each other, and the distance between the first side of the signal radiation arm and the first side of the ground radiation arm is at least 1 mm.

[0051] The first antenna ground feed 211 is aligned with the first side of the signal radiation arm; the first antenna ground feed 221 is aligned with the first side of the ground radiation arm.

[0052] Furthermore, the first signal radiating arm 21 is provided with a circular hole 213 and a first slot 212, the circular hole 213 is arranged inside the first signal radiating arm 21, and the first slot 212 extends into the interior of the first signal radiating arm 21 and is connected to the circular hole 213; the first ground radiating arm 22 is provided with a second slot 222, and the second slot 222 extends into the interior of the first ground radiating arm 22.

[0053] In this embodiment, the opening of the first slot 212 is set at the sixth side of the signal radiation arm, the width of the first slot 212 is 3 mm, the angle between the first slot 212 and the fifth side of the signal radiation arm is 6°, and the first slot 212 extends into the interior of the first signal radiation arm 21 and is connected to the circular hole 213.

[0054] The radius of circular hole 213 is 2.15mm. The distance from the center of circular hole 213 to the fifth side of the signal radiating arm is 4.05mm, and the distance from the center of circular hole 213 to the sixth side of the signal radiating arm is 4.62mm. The provision of first slot 212 and circular hole 213 improves the antenna's frequency deviation, ensuring that the antenna's RF performance meets design requirements.

[0055] The first ground radiating arm 22 has a second slot 222 extending inwardly of the first ground radiating arm 22. The second slot 222 has a width of 0.6 mm and is parallel to the fifth side of the ground radiating arm. The provision of the second slot 222 ensures that the antenna's RF performance meets design requirements.

[0056] Furthermore, a third slot 214 is formed on one side of the circular hole 213 away from the first slot 212 .

[0057] In this embodiment, the angle between the extending direction of the third slot 214 and the fifth side of the signal radiating arm is 8°, and the width of the third slot 214 is 0.6 mm. By providing the third slot 214, the RF performance of the antenna can be guaranteed to meet the design requirements.

[0058] Furthermore, the second signal radiation arm 31 is consistent in shape and size with the first signal radiation arm 21 ; the second ground radiation arm 32 is consistent in shape and size with the first ground radiation arm 22 .

[0059] In this embodiment, the second antenna 3 composed of the second signal radiating arm 31 and the second ground radiating arm 32 is equivalent to the first antenna 2 flipped 180° along the length direction of the antenna substrate 1 and arranged on the back side of the antenna substrate 1. Therefore, the structure of the second antenna 3 is completely consistent with that of the first antenna 2, and the advantages brought by its structure are consistent with those of the first antenna 2, which will not be repeated here.

[0060] Furthermore, the third antenna 4 includes a third signal radiation arm 41 and a third ground radiation arm 42, and the third signal radiation arm 41 is sequentially connected to the first signal radiation part 412, the second signal radiation part 413, the third signal radiation part 414 and the fourth signal radiation part 415; the third ground radiation arm 42 is sequentially connected to the first ground radiation part 422 and the second ground radiation part 423; the third signal radiation arm 41 and the third ground radiation arm 42 are connected by a bending part 424.

[0061] In this embodiment, the length direction of the antenna substrate 1 is defined as the left-right direction, and the width direction of the antenna substrate 1 is defined as the up-down direction, so as to describe various parts of the third antenna 4 .

[0062] The third ground radiation arm 42 is arranged on the right side of the third signal radiation arm 41, and the distance between the third signal radiation arm 41 and the third ground radiation arm 42 is 0.5 mm. The first signal radiation part 412 is connected to the lower end of the third signal radiation arm 41 and is located at the lower end of the third ground radiation arm 42. The distance between the first signal radiation part 412 and the third ground radiation arm 42 is 1 mm. The second signal radiation part 413 is connected to the lower side of the right end of the first signal radiation part 412, the third signal radiation part 414 is connected to the lower end of the second signal radiation part 413, and the fourth signal radiation part 415 is connected to the upper side of the left end of the third signal radiation part 414.

[0063] The third signal radiation arm 41 is arranged at 90° to the first signal radiation portion 412 , the first signal radiation portion 412 is arranged at 90° to the second signal radiation portion 413 , the second signal radiation portion 413 is arranged at 90° to the third signal radiation portion 414 , and the third signal radiation portion 414 is arranged at 90° to the fourth signal radiation portion 415 .

[0064] Among them, the length of the first signal radiation part 412 is 11.2mm, the width is 4.2mm, the lower left corner of the first signal radiation part 412 is provided with an obtuse cut corner, and the upper right corner of the first signal radiation part 412 is provided with a cut corner; the length of the second signal radiation part 413 is 3.2mm, and the width is 1.35mm; the length of the third signal radiation part 414 is 11.2mm, and the width is 1.65mm; the length of the fourth signal radiation part 415 is 1.7mm, and the width is 1.65mm.

[0065] The first ground radiating portion 422 is connected to the upper side of the right end of the third ground radiating arm 42, and the second ground radiating portion 423 is connected to the left side of the upper end of the first ground radiating portion 422. The third ground radiating arm 42 is arranged at a 90° angle to the first ground radiating portion 422, and the second ground radiating portion 423 is arranged at a 90° angle to the first ground radiating portion 422. The lower right end of the third ground radiating arm 42 is provided with a chamfer.

[0066] The first ground radiation portion 422 has a length of 7.48 mm and a width of 1.35 mm; the second ground radiation portion 423 has a length of 11.2 mm and a width of 1.67 mm.

[0067] The bent portion 424 is N-shaped, with a chamfered corner on the left side. The left end of the bent portion 424 is connected to the upper end of the third signal radiating arm 41, and the right end of the bent portion 424 is connected to the upper end of the third ground radiating arm 42. The third signal radiating arm 41 is provided with a third antenna signal feed 411, and the third ground radiating arm 42 is provided with a third antenna ground feed 421.

[0068] By welding the core of the coaxial cable to the third antenna signal feeder 411 and welding the conductive skin of the coaxial cable to the third ground radiation arm 421 , the signal of the third antenna 4 can be brought out.

[0069] Furthermore, the length of the antenna substrate 1 is 60.8 mm, and the width of the antenna substrate 1 is 32 mm.

[0070] In this embodiment, the window size of the smart door lock is 60.8*32mm. In order to ensure the performance indicators of the radio frequency signal, the minimum size of the antenna substrate 1 is also 60.8*32mm, where the minimum spacing between the first antenna 2 and the third antenna 4 is 8.67mm, which can meet the antenna distribution limit state of the smart door lock with few windows and small size, and meet the performance requirements of the radio frequency signal.

[0071] Table 1 shows the efficiency and gain of the three antennas in the 2.4 GHz operating frequency band:

[0072]

[0073] Table 1

[0074] From the above description, it can be seen that the beneficial effects of the present invention are: providing a smart door lock communication antenna assembly with a reasonable structure and compact layout, which integrates 3 antennas in a limited space. While ensuring the antenna performance, it reduces the number and area of ​​antenna windows of the smart door lock, ensures the structural strength of the smart door lock, reduces the difficulty of assembly, and optimizes the production and development costs.

[0075] See also Figure 9 The present invention also relates to a smart door lock, including the smart door lock communication antenna assembly described above. The smart door lock includes a main structure 100, in which the smart door lock communication antenna assembly is disposed. The main structure is provided with an antenna window 101 corresponding to the smart door lock communication antenna assembly. The advantages of the smart door lock over the prior art are the same as those of the smart door lock communication antenna assembly described above, and are not further described.

[0076] It is easy for those skilled in the art to understand that the above embodiments can be freely combined and superimposed without conflict.

[0077] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A smart door lock communication antenna assembly, characterized by: It includes an antenna substrate, on which a first antenna, a second antenna and a third antenna are provided. The first antenna and the third antenna are arranged on one side of the antenna substrate, and the second antenna is arranged on the other side of the antenna substrate. The third antenna is an IFA antenna, and the minimum distance between the third antenna and the first antenna is 8.67 mm.

2. The smart door lock communication antenna assembly according to claim 1, characterized in that: The first antenna includes a first signal radiating arm and a first ground radiating arm, the first signal radiating arm is provided with a first antenna signal feed, and the first ground radiating arm is provided with a first antenna ground feed; the second antenna includes a second signal radiating arm and a second ground radiating arm, the second signal radiating arm is provided with a second antenna signal feed, and the second ground radiating arm is provided with a first antenna ground feed, and the first signal radiating arm, the first ground radiating arm, the second signal radiating arm and the second ground radiating arm are arranged in an X-shaped cross pattern.

3. The smart door lock communication antenna assembly according to claim 2, characterized in that: The first signal radiation arm is in a first irregular hexagonal shape; the first ground radiation arm is in a second irregular hexagonal shape.

4. The smart door lock communication antenna assembly according to claim 3, characterized in that: The first signal radiating arm is provided with a circular hole and a first slot, wherein the first slot extends toward the interior of the first signal radiating arm and is connected to the circular hole; the first ground radiating arm is provided with a second slot, wherein the second slot extends toward the interior of the first ground radiating arm.

5. The smart door lock communication antenna assembly according to claim 4, characterized in that: The circular hole is provided with a third slot on one side away from the first slot.

6. The smart door lock communication antenna assembly according to claim 2, characterized in that: The second signal radiation arm is consistent with the first signal radiation arm in shape and size; the second ground radiation arm is consistent with the first ground radiation arm in shape and size.

7. The smart door lock communication antenna assembly according to claim 1, characterized in that: The third antenna includes a third signal radiation arm and a third ground radiation arm, the third signal radiation arm is sequentially connected to the first signal radiation part, the second signal radiation part, the third signal radiation part and the fourth signal radiation part; the third ground radiation arm is sequentially connected to the first ground radiation part and the second ground radiation part; the third signal radiation arm and the third ground radiation arm are connected by a bending part.

8. The smart door lock communication antenna assembly according to claim 7, characterized in that: The third signal radiating arm is provided with a third antenna signal feed; the third ground radiating arm is provided with a third antenna ground feed.

9. The smart door lock communication antenna assembly according to claim 1, characterized in that: The length of the antenna substrate is 60.8 mm, and the width of the antenna substrate is 32 mm.

10. A smart door lock, characterized by: It comprises the smart door lock communication antenna assembly as described in any one of claims 1-9.

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