A kind of smartwatch tuner
Technical field
The utility model relates to smartwatch manufacturing technology field, in particular to a kind of smartwatch tuner.
Background technique
With the development of intelligent mobile terminal technology, the performance that mobile terminal is compatible with is enriched constantly.Wearable device is made
For new human-computer interaction entrance, there are good market prospects.With the universal and update of wearable device, it is compatible with
Function is also more and more abundant.Existing wearable product using smartwatch as mainstream, since initial only Bluetooth function to 2G,
3G, 4G the whole network talks about all, data connection function, while the integrated development of the functions such as compatible with GPS, wifi/ bluetooth and NFC.With
This is limited by product appearance simultaneously, the deficiency of Antenna Design area, leads to aerial radiation with particular reference to ground area deficiency
Efficiency decline, it is especially particularly evident to such as 824-960MHz call and the influence of data connection low-frequency range.Academic circles at present
In eigen mode theory, guarantee refers to enough areas and by the excitation to reference ground mode, can be realized the height of antenna
Radiation efficiency, so miniature antenna designs, the size of reference ground product becomes the key of design.
In existing smartwatch design, solving the insufficient scheme of reference ground product mainly has: respective antenna is designed in gold
Belong to watchband or is connect pcb board reference with metal watchband by coaxial line apparatus.Both modes are all to pass through connector device
Set wrist-watch pcb board and metal watchband physical connection, but the disadvantage is that with watchband rotation, connection coaxial line be easy to lose
Product service life is influenced, or the comfort level that user wears the product can be seriously affected by way of fixation table band.
Utility model content
The utility model embodiment provides a kind of smartwatch tuner, to solve current smartwatch due to volume
The product deficiency of reference ground caused by smaller causes antenna radiation efficiency difference and watchband to be directly electrically connected with table body by coaxial line etc.
Caused by connector service life short problem.In order to which some aspects of the embodiment to disclosure have a basic understanding, give below
Simple summary is gone out.The summarized section is not extensive overview, nor to determine key/critical component or describe these
The protection scope of embodiment.Its sole purpose is that some concepts are presented with simple form, in this, as following detailed description
Preamble.
To achieve the above object, the utility model provides a kind of smartwatch tuner, comprising: metal chassis and gold
Belong to table axis;The metal chassis is connect with metal watch axis both ends, and the metal watch axis is by nonmetal medium by metal watchband packet
It wraps up in, the pcb board in the metal chassis is electrically connected by the first matching device and connector with the metal chassis.
By adopting the above technical scheme, metal watch axis is wrapped up by nonmetal medium by metal watchband, is formed stable equivalent
Capacitor, make it is non-contact between metal watchband and metal shaft be electrically connected, realize to extend between watchband and table body in structure design and connect
Connect the service life of device;Pcb board is electrically connected by the first matching device and connector with metal chassis, with realizing antenna reference
Extension, meanwhile, the metal watchband can be used as antenna branch, to improve the radiation efficiency of antenna.
Preferably, the first matching device is using inductively or capacitively.
Preferably, the first matching device uses variable capacitance.
By adopting the above technical scheme, equivalent capacity pair is formed to tune metal watchband and metal watch axis by matching device
The enhancing of special frequency channel signal.
Further, it is additionally provided with first switch between the first matching device and connector, pcb board passes through described
First matching device connects the non-moving end of the first switch, and the moved end of the first switch connects one end of the connector,
The other end of the connector connects the metal chassis.
By adopting the above technical scheme, matched form is selected by first switch, reduced under manpower wear condition to reference
The influence of ground prolongation or antenna, thus the enhancing under compatible manpower wear condition with performance under free space scene.
Preferably, the connector uses spring probe.
Preferably, the connector uses metal clips.
Preferably, the signal source on the mainboard pcb board is connect by tuning circuit with antenna.
Preferably, the tuning circuit includes second switch and the second matching device, the signal output end of the signal source
The second matching device is connected by the second switch, the second matching device connects the antenna.
Preferably, the second matching device is using inductively or capacitively.
The beneficial effects of the utility model are: the utility model can pass through metal watch axis and metal watchband equivalent capacity
Electric connection mode realizes the service life for extending connector between watchband and table body in structure design, and passes through metal watch axis
Electrical connection to pcb board, realizes the extension on antenna reference ground, to improve the radiation efficiency of antenna.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The utility model can be limited.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one specific embodiment of the utility model.
Fig. 2 is that structural schematic diagram is cutd open in the side of the utility model wrist-watch metal chassis, table axis and watchband.
Fig. 3 is the equivalent circuit diagram of one specific embodiment of the utility model.
Fig. 4 is the reference ground schematic diagram of the utility model antenna.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples:
As shown in Figure 1, a kind of smartwatch tuner, comprising: metal chassis 1 and metal watch axis 3;The metal chassis
1 connect conducting with 3 both ends of metal watch axis, and the metal watch axis 3 is wrapped up by nonmetal medium 11 by metal watchband 4, is formed steady
Fixed equivalent capacity, the pcb board 2 in the metal chassis 1 pass through the first matching device 8 and connector 9 and the metal chassis 1
Electrical connection.The connection of metal chassis and metal watch axis is routine techniques, and details are not described herein.
The first matching device 8 is using inductively or capacitively.
In the present embodiment, the first matching device 8 includes first capacitor 81 and the second capacitor 82.In other embodiments,
One matching device can also use variable capacitance.
In the present embodiment, first switch 10, pcb board 2 are additionally provided between the first matching device 8 and connector 9
It is connect by via hole 13 with first capacitor 81 and the second capacitor 82, the first capacitor 81 and the second capacitor 82 are separately connected described
The non-moving end of first switch 10, the moved end of the first switch 10 connect one end of the connector 9, the connector 9 it is another
One end connects the metal chassis 1, and in the present embodiment, first switch 10 uses single-pole double-throw switch (SPDT).
In the present embodiment, the switching of first switch identifies usage scenario by sensor or signal strength detection device, and
Switch preset state is switched in such a way that chip logic exports.
The connector 9 uses spring probe or metal clips.
In the present embodiment, the connector 9 uses spring probe.
Signal source 5 on the mainboard pcb board 2 is connect by tuning circuit 6 with antenna 7.
The tuning circuit 6 includes second switch 12 and the second matching device, the second matching device using capacitor or
Inductance.
In the present embodiment, the second matching device includes third capacitor 131 and the 4th capacitor 132.
The signal output end of the signal source 5 connects the moved end of the second switch 12, the second switch 12 it is motionless
End is separately connected third capacitor 131 and the 4th capacitor 132, and third capacitor 131 and the 4th capacitor 132 connect the antenna 7, this reality
It applies in example, second switch uses single-pole double-throw switch (SPDT).
Metal watchband had both been used as the prolongation on antenna reference ground, has the prolongation as antenna radiator, can be
One metal watchband wraps up a metal watch axis by nonmetal medium interval, be also possible to two metal watchbands pass through respectively it is non-
Wrap up two metal watch axis in metal medium interval.And antenna reference the ground size of prolongation and the size of metal watchband and metal
Nonmetal medium thickness, material are then determined according to the effect formed to antenna special frequency channel between table axis and metal watchband.
As shown in Fig. 2, structural schematic diagram is cutd open in the side for wrist-watch metal chassis, table axis and watchband.Metal watchband 4 wraps up metal
Table axis 3, wherein separated by nonmetal medium 11, in a ring, when metal watchband 4 rotates, metal watchband 4 and metal watch axis 3
Spacing is constant, and equivalent capacity is also constant.
As shown in figure 3, being equivalent circuit diagram, antenna 7 is sequentially connected in series pcb board 2, first switch 10, first matches device 8,
The equivalent capacity 14 and metal watchband 4 that metal chassis 1, metal watchband package metal watch axis are formed.Being formed has tuning with reference to ground
The extension of effect.
As shown in figure 4, for the reference ground schematic diagram of antenna 7, as shown in dash area in figure, successively are as follows: pcb board 2, first
Switch 10, first matches device 8, connector 9, metal chassis 1, metal watch axis 3 and the gold with metal watch axis 3 with equivalent capacity
Belong to watchband 4.
The preferred embodiments of the present invention have been described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality according to the design of the utility model on the basis of existing technology in domain
Available technical solution is tested, it all should be within the scope of protection determined by the claims.