CN216251095U - Shielding assembly, electric tuning controller and electric tuning antenna - Google Patents
Shielding assembly, electric tuning controller and electric tuning antenna Download PDFInfo
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- CN216251095U CN216251095U CN202122679458.2U CN202122679458U CN216251095U CN 216251095 U CN216251095 U CN 216251095U CN 202122679458 U CN202122679458 U CN 202122679458U CN 216251095 U CN216251095 U CN 216251095U
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Abstract
The utility model belongs to the field of wireless communication, and particularly relates to a shielding assembly, an electric tuning controller and an electric tuning antenna, wherein the shielding assembly comprises an electromagnetic shielding box, a coaxial cable and an electromagnetic sealing element, an accommodating space is arranged inside the electromagnetic shielding box, and a cable hole for communicating the accommodating space with the outside is arranged on the electromagnetic shielding box; the coaxial cable is arranged in the cable hole in a penetrating way; the electromagnetic sealing element is arranged in the cable hole to seal a gap between the coaxial cable and the electromagnetic shielding box, and the electromagnetic shielding layer of the coaxial cable is electrically connected with the electromagnetic shielding box through the electromagnetic sealing element. This shielding assembly can realize comprehensive electromagnetic shield to the inner conductor at PCB control panel, driving motor and coaxial cable center, reduces the electromagnetic interference that the electric accent driver during operation produced the antenna, stabilizes the radiation performance of antenna.
Description
Technical Field
The utility model relates to the technical field of wireless communication, in particular to a shielding assembly, an electric tuning controller and an electric tuning antenna.
Background
With the development of communication systems, base station antennas are increasingly used. In a mobile base station communication system, two methods, manual adjustment and electric adjustment, are commonly used for adjusting the downward inclination angle of an antenna. The electrically tunable antenna is a mobile antenna that uses electrons to adjust a downtilt angle, and the application of the electrically tunable antenna in mobile communication is becoming more and more popular.
The existing electrically-controlled antenna is generally provided with an electrically-controlled controller, the electrical downtilt angle of the electrically-controlled antenna is adjusted by adjusting a phase shifter, and the electrically-controlled antenna is adjusted manually relatively. However, when components in the electrically tunable driver work, electromagnetic waves are generated, and the electromagnetic waves can generate electromagnetic interference on the antenna, so that the radiation performance of the antenna is affected.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a shielding assembly, an electric tuning controller and an electric tuning antenna, which are used for solving the problem that electromagnetic waves generated by components in an electric tuning driver during working can generate electromagnetic interference on the antenna and influence the radiation performance of the antenna.
To this end, according to one aspect of the present application, there is provided a shielding assembly comprising:
the electromagnetic shielding box is internally provided with an accommodating space, and is provided with a cable hole for communicating the accommodating space with the outside;
the coaxial cable is arranged in the cable hole in a penetrating mode; and
and the electromagnetic sealing element is arranged in the cable hole so as to seal a gap between the coaxial cable and the electromagnetic shielding box, and the electromagnetic shielding layer of the coaxial cable is electrically connected with the electromagnetic shielding box through the electromagnetic sealing element.
Optionally, the electromagnetic sealing element includes a conductive rubber sleeve, the conductive rubber sleeve is sleeved on the coaxial cable, and the conductive rubber sleeve and the coaxial cable and the conductive rubber sleeve and the cable hole are in interference fit.
Optionally, the outer layer rubber of the coaxial cable is stripped at a position corresponding to the conductive rubber sleeve to expose the electromagnetic shielding layer, and the conductive rubber sleeve is in interference fit with the electromagnetic shielding layer.
Optionally, the electromagnetic shielding box includes box body and lid, and the lid sets up on the opening of box body to enclose jointly with the box body and close and form the accommodation space.
Optionally, the electromagnetic shielding box further includes a conductive rubber ring, and the conductive rubber ring is disposed between the box cover and the box body to seal a gap between the box cover and the box body.
Optionally, the electromagnetic shielding box and the electromagnetic sealing member contain, are themselves, or are surface-coated with a metallic material.
According to another aspect of the present application, there is provided an electrical tilt controller including
In the shielding assembly, the electromagnetic shielding box is provided with the through hole;
the PCB control board is accommodated in the accommodating space and is electrically connected with the coaxial cable;
the driving motor is accommodated in the accommodating space and is electrically connected to the PCB control board, and a motor shaft of the driving motor extends out of the accommodating space through the through hole; and
and the linear motion mechanism is arranged on the outer side of the electromagnetic shielding box and is used for connecting the phase shifter so as to enable the driving motor to control the phase shifter to move through the linear motion mechanism.
Optionally, there are two driving motors and two linear motion mechanisms, and the two driving motors are respectively connected to the two linear motion mechanisms in a one-to-one correspondence manner.
Optionally, linear motion mechanism includes drive assembly, threaded rod, guide bar and moving member, and the threaded rod sets up with guide bar parallel arrangement, and the moving member spiro union is in the threaded rod and the guide bar is located to the cover, and drive assembly sets up between motor shaft and threaded rod, and driving motor passes through drive assembly drive threaded rod and rotates to drive the moving member and remove along the guide bar.
According to another aspect of the application, an electric tilt antenna is provided, which comprises the electric tilt controller.
The application provides a shielding component, electricity transfer controller and electricity transfer antenna's beneficial effect lies in: compared with the prior art, when this application shielding component used, set up PCB control panel and driving motor in electromagnetic shield box's accommodation space, PCB control panel and driving motor pass through coaxial cable and are connected with external signal control mouth, seal through the electromagnetic seal spare to the clearance between coaxial cable and the electromagnetic shield box, and make coaxial cable's electromagnetic shield layer switch on through electromagnetic seal spare and electromagnetic shield box electrical property, and then to the PCB control panel, driving motor and coaxial cable center's inner conductor realize comprehensive electromagnetic shield, reduce the electromagnetic interference that the driver during operation produced the antenna of electricity accent, stabilize the radiation performance of antenna.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a cross-sectional structural view of a shield assembly shown in accordance with an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a connection among a coaxial cable, an electromagnetic shielding box and an electromagnetic sealing element in the shielding assembly according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an electrical tilt controller according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structural diagram of an electric tuning controller according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an internal structure of an electrical tilt controller according to an embodiment of the present invention.
Description of the main element symbols:
100. an electromagnetic shielding box;
110. a box body; 111. an opening; 112. connecting lugs; 120. a box cover; 130. a conductive rubber ring; 101. an accommodating space; 102. a cable hole;
200. a coaxial cable;
210. an inner conductor; 220. an insulating layer; 230. an electromagnetic shielding layer; 240. an outer layer rubber sheet;
300. an electromagnetic seal; 301. a card slot;
400. a PCB control board;
500. a drive motor;
510. a motor shaft;
600. a linear motion mechanism;
610. a transmission assembly; 611. a driving gear; 612. an idler pulley; 613. a driven gear; 620. a threaded rod; 630. a guide bar; 640. a moving member.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As described in the background art, when the conductive component in the electrically tunable driver works, electromagnetic waves are generated, and the electromagnetic waves generate electromagnetic interference on the antenna, which affects the radiation performance of the antenna.
In order to solve the above problem, according to an aspect of the present application, an embodiment of the present application provides a shielding assembly, which is intended to perform comprehensive electromagnetic shielding on a conductive component in an electrical tuning driver, so as to reduce electromagnetic interference generated by the electrical tuning driver to an antenna when the electrical tuning driver operates.
It should be noted that the shielding assembly is not limited to be applied to electromagnetically shielding a conductive component in an electrical tuning driver, but may also be applied to electromagnetically shielding components or devices that need to be electromagnetically shielded in the communication field or other fields.
In an embodiment of the present invention, as shown in fig. 1-2, the shielding assembly includes an electromagnetic shielding box 100, a coaxial cable 200, and an electromagnetic seal 300. The electromagnetic shielding box 100 is provided therein with an accommodating space 101, and the electromagnetic shielding box 100 is provided with a cable hole 102 for communicating the accommodating space 101 with the outside. The coaxial cable 200 is inserted into the cable hole 102. The electromagnetic sealing member 300 is disposed in the cable hole 102 to seal a gap between the coaxial cable 200 and the electromagnetic shielding box 100, and the electromagnetic shielding layer 230 of the coaxial cable 200 is electrically connected to the electromagnetic shielding box 100 through the electromagnetic sealing member 300.
When this shielding component uses, set up PCB control panel and driving motor in electromagnetic shield box 100's accommodation space 101, PCB control panel and driving motor pass through coaxial cable 200 and are connected with external signal control mouth, seal up the clearance between coaxial cable 200 and the electromagnetic shield box 100 through electromagnetic seal 300, and make coaxial cable 200's electromagnetic shield layer 230 switch on with electromagnetic shield box 100 electrical property through electromagnetic seal 300, and then to the PCB control panel, driving motor and coaxial cable 200 center inner conductor 210 realize comprehensive electromagnetic shield, reduce the electromagnetic interference that the driver during operation of electricity accent produced the antenna.
It should be noted that the coaxial cable 200 is a wire and signal transmission line, and is used for electrically connecting a component disposed in the accommodating space 101 with an external control component, the coaxial cable 200 is generally composed of four layers of coaxially disposed media, which are, in order from inside to outside, an inner conductor 210, an insulating layer 220, an electromagnetic shielding layer 230, and an outer layer rubber 240, in general, the inner conductor 210 is a conductive copper wire, and the electromagnetic shielding layer 230 is a thin mesh conductor (generally, copper or alloy).
It can be understood that the electromagnetic shielding box 100 can electromagnetically shield the PCB control board and the driving motor disposed in the accommodating space 101, the electromagnetic shielding layer 230 of the coaxial cable 200 can electromagnetically shield the inner conductor 210 in the center of the coaxial cable 200, but electromagnetic leakage occurs in the gap between the coaxial cable 200 and the electromagnetic shielding box 100 disposed in the cable hole 102, the electromagnetic sealing element 300 is used to electromagnetically shield the gap between the coaxial cable 200 and the electromagnetic shielding box 100, and the electromagnetic shielding layer 230 of the coaxial cable 200 is electrically connected to the electromagnetic shielding box 100, so that the electromagnetic shielding box 100, the electromagnetic shielding layer 230 of the coaxial cable 200, and the electromagnetic sealing element 300 form a comprehensive barrier, which can comprehensively shield the PCB control board and the driving motor disposed in the accommodating space 101 and the inner conductor 210 in the center of the coaxial cable 200, electromagnetic leakage is reduced, and the electromagnetic shielding effect is improved.
In one embodiment, as shown in fig. 1-2, the electromagnetic sealing element 300 includes a conductive rubber sleeve, which is disposed on the coaxial cable 200, and the conductive rubber sleeve and the coaxial cable 200 and the conductive rubber sleeve and the cable hole 102 are in interference fit.
It can be understood that the conductive rubber sleeve can conduct electricity, and has elasticity, and the conductive rubber sleeve is sleeved on the coaxial cable 200, so that the gap between the coaxial cable 200 and the electromagnetic shielding box 100 can be well sealed, and a good shielding effect is achieved at the outlet of the electromagnetic shielding box 100.
Specifically, the conductive rubber sleeve may be conductive rubber or conductive silicone.
In a specific embodiment, as shown in fig. 1-2, the outer layer 240 of the coaxial cable 200 is stripped off corresponding to the position of the conductive rubber sleeve to expose the electromagnetic shielding layer 230, and the conductive rubber sleeve is in interference fit with the electromagnetic shielding layer 230.
The conductive rubber sleeve sleeved on the coaxial cable 200 is electrically connected to the electromagnetic shielding layer 230 by stripping the outer rubber 240 of the coaxial cable 200, so that the operation is simple and convenient.
Further, in order to improve the connection stability between the conductive rubber sleeve and the electromagnetic shielding box 100, an annular clamping groove 301 is formed in the outer wall of the conductive rubber sleeve along the circumferential direction, and the portion, located around the cable hole 102, of the electromagnetic shielding box 100 is clamped into the clamping groove 301.
In one embodiment, as shown in fig. 1, the electromagnetic shielding box 100 includes a box body 110 and a box cover 120, wherein the box cover 120 is disposed on the opening 111 of the box body 110 to form an accommodating space 101 together with the box body 110.
The electromagnetic shielding box 100 is formed by combining a box body 110 and a box cover 120, so that components can be conveniently arranged in the accommodating space 101 and connected with the coaxial cable 200.
Specifically, the box body 110 and the box cover 120 can be connected by screws, for example, a connecting column is arranged in the box body 110, a threaded hole is arranged on the connecting column, a countersunk through hole corresponding to the threaded hole is arranged on the box cover 120, and the box body 110 and the box cover 120 are connected together by screws penetrating through the countersunk through hole and the threaded hole. The design makes the assembly of the box body 110 and the box cover 120 convenient and the connection reliable.
Of course, the box body 110 and the box cover 120 can be connected by a snap, for example, a groove is provided on the box body 110, and a buckle head corresponding to the groove is provided on the box cover 120.
In other implementations, the box body 110 and the box cover 120 may be connected by welding or other conventional connection methods, which are not limited herein.
It should be noted that, in other embodiments, the electromagnetic shielding box 100 may also be integrally injection-molded through a mold, for example, the PCB control board and the driving motor connected to the coaxial cable 200 are placed in the mold, and after the electromagnetic shielding box 100 is molded, the PCB control board and the driving motor are located in the accommodating space 101 of the electromagnetic shielding box 100.
In one embodiment, as shown in fig. 1, the electromagnetic shielding box 100 further includes a conductive rubber ring 130, and the conductive rubber ring 130 is disposed between the box cover 120 and the box body 110 to seal a gap between the box cover 120 and the box body 110.
By arranging the conductive rubber ring 130 between the box cover 120 and the box body 110, the sealing performance of the electromagnetic shielding box 100 is further improved, so as to achieve a better electromagnetic shielding effect.
Specifically, the conductive rubber ring 130 may be conductive rubber or conductive silicone. The conductive rubber ring 130 may be fixed on the opening 111 of the box body 110, and after the box cover 120 is connected to the box body 110, the conductive rubber ring 130 is pressed and deformed by the box cover 120 and the box body 110 to fill the gap between the box cover 120 and the box body 110, of course, the conductive rubber ring 130 may also be fixed on the side of the box cover 120 facing the box body 110, as long as the gap between the box cover 120 and the box body 110 can be sealed.
In some embodiments, the electromagnetic shielding box 100 and the electromagnetic seal 300 are comprised by, or are themselves, or are surface coated with a metallic material.
According to another aspect of the present application, an embodiment of the present application further provides an electrical tilt controller, as shown in fig. 3 to 5, including the above-mentioned shielding assembly, PCB control board 400, driving motor 500, and linear motion mechanism 600. The electromagnetic shielding box 100 of the shielding assembly is provided with a through hole (not shown in the figure); the PCB control board 400 is accommodated in the accommodating space 101, and the PCB control board 400 is electrically connected to the coaxial cable 200; the driving motor 500 is accommodated in the accommodating space 101, the driving motor 500 is electrically connected to the PCB control board 400, and a motor shaft 510 of the driving motor 500 extends out of the accommodating space 101 through the through hole; the linear motion mechanism 600 is disposed outside the electromagnetic shielding box 100, and the linear motion mechanism 600 is used to connect the phase shifter, so that the driving motor 500 controls the phase shifter to move through the linear motion mechanism 600.
In the embodiment of the present invention, the PCB control board 400 and the driving motor 500 are disposed in the accommodating space 101 of the electromagnetic shielding box 100, so that the shielding assembly is utilized to improve the shielding performance of the whole electrically tunable controller, reduce the electromagnetic interference generated by the electrically tunable driver to the antenna during operation, and stabilize the radiation performance of the antenna.
Further, in order to facilitate the installation and arrangement of the electrically tunable controller on the antenna, a plurality of connection lugs 112 are disposed on the outer side of the electromagnetic shielding box 100, and installation holes are disposed on the connection lugs 112, so that the electrically tunable controller can be fixed on the antenna by passing screws through the installation holes on the connection lugs 112.
In one embodiment, as shown in fig. 3 to 5, there are two driving motors 500 and two linear motion mechanisms 600, and the two driving motors 500 are respectively connected to the two linear motion mechanisms 600 in a one-to-one correspondence.
Through setting up two driving motor 500 and two linear motion mechanism 600, can independently adjust two sets of looks wares simultaneously, overall structure is compact, and low cost has solved other electricity and has transferred antenna controller and only can carry out the problem of independent adjustment to a set of looks ware, has solved other electricity simultaneously and has transferred antenna controller and need use the problem that two controllers brought when needing independent adjustment two sets of looks wares are expensive, be difficult to arrange.
In a specific embodiment, as shown in fig. 3 and 5, the linear motion mechanism 600 includes a transmission assembly 610, a threaded rod 620, a guide rod 630 and a moving member 640, the threaded rod 620 is parallel to the guide rod 630, the moving member 640 is screwed to the threaded rod 620 and sleeved on the guide rod 630, the transmission assembly 610 is disposed between the motor shaft 510 and the threaded rod 620, and the driving motor 500 drives the threaded rod 620 to rotate through the transmission assembly 610, so as to drive the moving member 640 to move along the guide rod 630.
It is understood that the screw rod 620 and the guide rod 630 may be provided on the electromagnetic shielding box 100 through a bracket formed at the outside of the electromagnetic shielding box 100. The transmission mode of the transmission assembly 610 may be gear transmission, or chain transmission, or belt transmission, in this embodiment, the transmission assembly 610 is gear transmission, specifically, the transmission assembly 610 includes a driving gear 611, an idle gear 612, and a driven gear 613, the driving gear 611 is fixed at one end of the motor shaft 510 extending out of the accommodating space 101, the driven gear 613 is fixed at one end of the threaded rod 620, and the idle gear 612 is rotatably disposed outside the electromagnetic shielding box 100 and is engaged with the driving gear 611 and the driven gear 613.
It should be noted that the motor shaft 510 and the through hole of the electromagnetic shielding box 100 are sealed by a conventional rotary sealing structure to reduce the leakage of electromagnetic waves from between the motor shaft 510 and the through hole.
According to still another aspect of the present application, an embodiment of the present application further provides an electrical tilt antenna, including the electrical tilt controller described above.
In the embodiment of the utility model, the electrically-adjustable antenna adopts the electrically-adjustable controller, so that the electromagnetic interference of the electrically-adjustable controller to the antenna is reduced, and the radiation performance of the antenna is improved and stabilized.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A shield assembly, comprising:
the electromagnetic shielding box is internally provided with an accommodating space, and a cable hole for communicating the accommodating space with the outside is formed in the electromagnetic shielding box;
the coaxial cable is arranged in the cable hole in a penetrating mode; and
and the electromagnetic sealing element is arranged in the cable hole so as to seal a gap between the coaxial cable and the electromagnetic shielding box, and an electromagnetic shielding layer of the coaxial cable is electrically connected with the electromagnetic shielding box through the electromagnetic sealing element.
2. The shielding assembly of claim 1, wherein the electromagnetic seal comprises a conductive rubber sleeve, the conductive rubber sleeve is sleeved on the coaxial cable, and the conductive rubber sleeve and the coaxial cable and the conductive rubber sleeve and the cable hole are in interference fit.
3. The shielding assembly of claim 2, wherein the coaxial cable is stripped of an outer rubber layer at a position corresponding to the conductive rubber sleeve to expose the electromagnetic shielding layer, and the conductive rubber sleeve is in interference fit with the electromagnetic shielding layer.
4. The shielding assembly of claim 1, wherein the electromagnetic shielding box comprises a box body and a box cover, and the box cover is disposed on the opening of the box body to form the accommodating space together with the box body.
5. The shielding assembly of claim 4, wherein the electromagnetic shielding box further comprises a conductive rubber ring disposed between the box cover and the box body to seal a gap between the box cover and the box body.
6. The shielding assembly of any of claims 1-5, wherein the electromagnetic shielding cage and the electromagnetic seal are internally, or themselves, or surface coated with a metallic material.
7. An electrical tuning controller, comprising:
the shielding assembly of any one of claims 1-6, wherein the electromagnetic shielding box is provided with a through hole;
the PCB control board is accommodated in the accommodating space and is electrically connected to the coaxial cable;
the driving motor is accommodated in the accommodating space and is electrically connected to the PCB control board, and a motor shaft of the driving motor extends out of the accommodating space through the through hole; and
and the linear motion mechanism is arranged on the outer side of the electromagnetic shielding box and is used for connecting the phase shifter so as to enable the driving motor to control the phase shifter to move through the linear motion mechanism.
8. The electrical tilt controller according to claim 7, wherein there are two driving motors and two linear motion mechanisms, and the two driving motors are respectively connected to the two linear motion mechanisms in a one-to-one correspondence.
9. The electric tilt controller according to claim 7, wherein the linear motion mechanism comprises a transmission assembly, a threaded rod, a guide rod and a moving member, the threaded rod is parallel to the guide rod, the moving member is screwed to the threaded rod and sleeved on the guide rod, the transmission assembly is arranged between the motor shaft and the threaded rod, and the driving motor drives the threaded rod to rotate through the transmission assembly so as to drive the moving member to move along the guide rod.
10. An electrically tunable antenna, characterized by comprising an electrically tunable controller according to any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122679458.2U CN216251095U (en) | 2021-11-02 | 2021-11-02 | Shielding assembly, electric tuning controller and electric tuning antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122679458.2U CN216251095U (en) | 2021-11-02 | 2021-11-02 | Shielding assembly, electric tuning controller and electric tuning antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216251095U true CN216251095U (en) | 2022-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122679458.2U Active CN216251095U (en) | 2021-11-02 | 2021-11-02 | Shielding assembly, electric tuning controller and electric tuning antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216251095U (en) |
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2021
- 2021-11-02 CN CN202122679458.2U patent/CN216251095U/en active Active
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