CN1778015A - Antenna device, door handle device - Google Patents

Abstract

The present invention provides an antenna device (1) comprising an antenna unit (2) consisting of an antenna core unit (5) provided with a soft magnetic element (51) having a conductivity and a conductor wire unit (6) attached to the antenna core unit (5). At least part (e.g., core sheet (50A)) of the antenna core unit (5) is used as a sensor electrode capable of detecting an object. The sensor electrode can be used as an electrostatic capacity type sensor electrode or the like. Accordingly, an antenna device having an antenna unit provided with an antenna core unit commonly used by both an antenna function and a sensor function, and a door-knob device are provided.

Description

Antenna assembly, door handle device

Technical field

The present invention relates to antenna assembly and door handle device.

Background technology

Patent documentation 1 discloses the door handle that is equipped with stick antenna portion.According to this handle, antenna part can be built in the lever body interior of door handle.Like this, when the user who carries electron key when the door handle, be accepting state, the ID that stick antenna portion just can receive from electron key encodes.

Patent documentation 2 discloses the door handle that has the antenna part that transmits.According to this handle, emission (signal) antenna part can be installed in the lever body interior of door handle.Like this, can carry out the signal emission from transmitting antenna portion.

In addition, patent documentation 3 and patent documentation 4 disclose the door switch unit that is equipped with transmitting antenna portion and static capacity type sensor electrode on door handle respectively.According to patent documentation 3 and patent documentation 4, on door handle, carry and launch the sensor electrode of antenna part and electrostatic capacitive respectively, though become high value added product, the sensor electrode of its transmitting antenna portion and electrostatic capacitive is made up of independent member.Therefore, antenna part is only brought into play antenna function, and sensor electrode is only brought into play the sensor function of electrostatic capacitive.Therefore antenna assembly and sensor electrode are configured respectively, need to increase its internal capacity.For example, when using, will have influence on the design of door handle as door handle.

Patent documentation 5 discloses for motor vehicle door switch unit.This door switch unit is equipped with the vehicle door handle that can carry out car door opening and close usefulness.Vehicle door handle inside is provided with antenna and sensor electrode.Patent documentation 6 discloses the en plaque sensor electrode that can improve emission characteristics and have the U word shape.And patent documentation 6 also discloses a kind of employing by having the built-in antenna of soft magnetic ferrite as stick antenna magnetic core gate handle.Simultaneously, patent documentation 7 discloses the close detecting sensor of the automobile specified human body that is equipped with the cable electrodes that is arranged in parallel.

Patent documentation 6 discloses opening and closing apparatus for vehicle door, and patent documentation 7 discloses the automobile specified human body near detecting sensor.Its said antenna device and transducer are formed by independent member, and are configured respectively.Therefore, the electrode of antenna assembly and transducer only possesses independent separately function.Though become high value added product, antenna part is only brought into play antenna function, and sensor electrode is only brought into play the static capacity type sensor function.If antenna assembly and sensor electrode are configured respectively, need to increase its inner volume.For example, when using, will have influence on the design of door handle as door handle.

Disclosed as patent documentation 6, when the transducer that utilizes the variation of human body static capacity when proximity transducer to detect had been disposed near the antenna assembly, the electric wave emission of antenna assembly will be restricted.Therefore, in patent documentation 6, adopted the sensor electrode that slightly is the U word shape, like this, can reduce the shielding surface of sensor electrode, reduced obstruction, thereby problem is solved the electric wave emission to antenna assembly.Yet the static capacity that will increase on the sensor electrode changes, and just needs to increase the area of sensor electrode.And the area of increase sensor electrode will cause the maximization of product.

Patent documentation 1: the spy opens the 2001-355358 communique;

Patent documentation 2: the spy opens the 2000-160897 communique;

Patent documentation 3: the spy opens the 2002-295064 communique;

Patent documentation 4: the spy opens the 2003-13628 communique;

Patent documentation 5: the spy opens the 2002-30844 communique;

Patent documentation 6: the spy opens the 2001-345615 communique;

Patent documentation 7: the spy opens flat 10-308149 communique.

Summary of the invention

The present invention has done further improvement with above-mentioned prior art at technical elements, promptly the objective of the invention is to, a kind of antenna magnetic core that has antenna function and sensor function simultaneously is provided, and the antenna assembly of the belt sensor that helps installing in a conned space and door handle device.

The antenna assembly of the 1st kind of mode is, setting is by the antenna magnetic core portion of soft-magnetic body, and be attached to the antenna part that the wire portion in the antenna magnetic core portion is formed, it is characterized in that: possess the conductive layer that is provided with at least a portion of antenna magnetic core portion, this conductive layer is used as sensor electrode.

According to this device, its antenna part is provided with antenna magnetic core portion and is attached to wire portion in this antenna magnetic core portion, can carry out signal emission and/or signal and receive.And the antenna magnetic core has at least a part to have conductive layer, and conductive layer is used as the electrode of transducer.Therefore, when the detected object object exists or during near sensor electrode, can detect the existence of detected object object or close.That is to say, constitute the soft-magnetic body of the antenna magnetic core portion of antenna part, its antenna function and sensor function the two all can be shared.

For example, when sensor electrode uses as the electrostatic capacitance sensor electrode, when the detected object object near this sensor electrode, will change by the detected static capacity of sensor electrode, thereby detect the existence of detected object object or close.Perhaps, if when the object that has conductivity such as water droplet attached to sensor electrode on the time because physical quantitys such as resistance change by sensor electrode, can detect the existence of detected object object.Like this, it also can be considered as other transducers and use can be used as outside the electrostatic capacitance sensor use.

And antenna assembly is because the sensor electrode that will have the antenna part of antenna function and have a sensor function is designed to integrated apparatus, thereby saved the space.Like this, antenna assembly can be configured in the narrow space and use.

The door handle device of the 2nd kind of mode has: antenna assembly, and it is provided with by antenna part and is attached to the antenna part that the wire portion in the antenna magnetic core portion is formed; And the handle that supports said antenna device, it is characterized in that: be provided with conductive layer at least a portion on the above-mentioned antenna magnetic core of said antenna device, this conductive layer is used as the sensor electrode.According to this door handle device, its antenna part is provided with antenna magnetic core portion and is attached to wire portion in the antenna magnetic core portion, can carry out the signal emission and (or) signal receives.Simultaneously, the antenna magnetic core has at least a part to be equipped with conductive layer, and this conductive layer is used as sensor electrode.Therefore, when the detected object thing exists or during near the transducer of door handle device, physical quantitys such as static capacity promptly change, can detect the existence of detected object thing or close.In other words, constitute the antenna magnetic core soft-magnetic body of antenna part, have the shared effect of antenna function and sensor function.

As mentioned above, the antenna assembly of the 1st kind of mode, and the door handle device of the 2nd kind of mode, the antenna magnetic core portion of its antenna part has had both antenna function and sensor function.Therefore, no matter it uses as antenna or as electrode sensor, the present invention all can provide belt sensor antenna assembly and the door handle device that can bring into play both functions.And antenna assembly involved in the present invention is that the sensor electrode that will have the antenna assembly of antenna function and have a sensor function is designed to an integral body, thereby has greatly saved the space.Therefore also just it can be assembled in the narrow space.

Description of drawings

Fig. 1 is the stereogram that has the antenna assembly of transducer in first execution mode.

Fig. 2 is the stereogram that has the antenna assembly of transducer in second execution mode.

Fig. 3 is the stereogram that has the antenna assembly of transducer in the 3rd execution mode.

Fig. 4 is the performance diagram that antenna service time and transducer concerned between service time in the 4th execution mode.

Fig. 5 is the end view that has the antenna assembly door handle device of transducer in the 5th execution mode.

Fig. 6 is the cutaway view of door handle device key position in the 5th execution mode.

Fig. 7 is the cutaway view of door handle device key position different directions in the 5th execution mode.

Fig. 8 is the cutaway view of door handle device key position different directions in the 6th execution mode.

Fig. 9 is the stereogram that has the antenna magnetic core portion of conductive layer in the 7th execution mode.

Figure 10 is at the state cutaway view of conductive layer antenna magnetic core outside coiling wire portion in the 7th execution mode.

Figure 11 is the stereogram that has the antenna assembly of transducer in the 7th execution mode.

Figure 12 is the performance diagram that antenna service time and transducer concerned between service time in the 7th execution mode.

Figure 13 is the stereogram that has the antenna magnetic core of conductive layer in the 8th execution mode.

Figure 14 is having mutually the state cutaway view of conductive layer antenna magnetic core outside coiling wire portion dorsad in the 9th execution mode.

Figure 15 is the vertical view that has the antenna assembly of transducer in the tenth execution mode.

Figure 16 is assemblied in the 11 execution mode on the car body and the cutaway view of the door handle device of the built-in antenna assembly that has a transducer.

Figure 17 is the front view of door handle device in first application examples.

Figure 18 is the cutaway view of door handle device in first application examples, along the cutaway view of the direction of arrow of the W18-W18 line of Figure 17.

Figure 19 is the pie graph that the user opens and closes the state that is arranged on door building, that have door handle in second application examples.

Figure 20 is the pie graph that is installed in the door handle device on the building in second application examples.

Figure 21 is the pie graph that is installed in other door handle devices on the building in second application examples.

Figure 22 is the pie graph that is applicable to factory's defective products checkout gear in the 3rd application examples.

Figure 23 is the pie graph that is applicable to factory's article detection device in the 4th application examples.

Embodiment

As the electrode of transducer, can illustrative mode be preferably static capacity type sensor electrode mode.In this case, when the detected object thing when this sensor electrode, promptly cause the variation of electrostatic capacitance amount, detect the existence of object.And, as the electrode of transducer, but illustration plain edition sensor electrode mode.In this case, in case when conductive materials contact pickup electrodes such as the globule, connect sensor electrode by conductive materials, thus can detect whether there is conductive materials by the variation of physical quantitys such as resistance value.Like this, it is except that can be used as the electrostatic capacitance sensor use, also applicable to otherwise transducer.

According to the present invention, antenna part is equipped with the antenna magnetic core portion of band soft-magnetic body and is attached to wire portion in the antenna magnetic core portion.Constitute the soft magnetic material of soft-magnetic body, can enumerate the good steel plate of magnetic permeability, silicon steel plate, amorphous soft magnetic material, soft magnetism Nanocrystalline materials etc.Therefore, as magnetic chip, can use steel plate, silicon steel plate, amorphous soft magnetic material and soft magnetism Nanocrystalline materials to make.Especially amorphous soft magnetic material or soft magnetism Nanocrystalline materials had both possessed conductivity, possessed high magnetic permeability and higher high frequency characteristics again.

As the amorphous soft magnetic material, can enumerate iron series and cobalt series material.As the soft magnetism Nanocrystalline materials, at least a such as can from iron (Fe), cobalt (Co), nickel (Ni), selecting, and from titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), molybdenum (Mo), chromium (Cr), tungsten (W), tantalum (Ta) and manganese (Mn), select at least a, simultaneously, form at the ultramicro-crystal grain below 2000 dusts, below 1000 dusts, below 500 dusts based on particle diameter.According to circumstances, the soft-magnetic body of formation antenna magnetic core portion also can form an integral body by sintered soft magnetic powder.And, antenna magnetic core portion can the illustration diaphragm seal mode of encapsulation.In this situation, to be corroded easily even constitute the material of antenna magnetic core portion, antenna magnetic core portion also can be protected further improves durability simultaneously.

According to the present invention, antenna magnetic core portion can adopt between adjacent magnetic chip to be situated between deformable aspect, and the mode of being made up of a plurality of magnetic chip laminations.In this case, form by the mode that deformable aspect is set between adjacent magnetic chip owing to antenna magnetic core portion.Therefore,, also can guarantee the deformation performance of magnetic chip, thereby improve the protectiveness of magnetic chip even do the time spent at the external force load.Deformable aspect can exemplify soft material layer and air layer.The soft material layer can exemplify elastomeric parts (rubber or soft resin etc.).In addition, the soft material layer can be the material that possesses high-insulativity or non-conductive property.

According to the present invention, opposed parts can take to be arranged on the opposite of conductive layer, enter the space so that form one between opposed parts and conductive layer for what the detected object thing entered.Certainly, conductive layer and opposed parts can be directly opposed across entering the space.Perhaps between conductive layer and opposed parts, dispose under the state of miscellaneous part, carry out conductive layer and opposed parts opposed.

Opposed parts can be made up of the material that possesses conductivity.Opposed parts preferably can ground connection (ground).Opposed parts itself also can be equipped with the antenna assembly of belt sensor.When being used for structures such as vehicle or building,, can adopt structures itself (comprising a body) such as car body or building as matrix.When adopting car body, need ground connection generally speaking as structure.

Preferably have the mode of control part, this control part sends or receives the signal of telecommunication for the lead of antenna part.At control part, illustration can take the emission of the guiding line portion signal of telecommunication or service time of antenna part when receiving, and to the transducer service time of sensor electrode power supply, the setting means that successively staggers in time.Do like this and help reducing noise.The service time of so-called antenna part and transducer service time staggering in time is meant that in time the time that the service time of antenna and transducer use not is in full accord, although the two partially overlaps, as long as both satisfy, and part is separated.

Antenna part is equipped with the wire portion that is attached in the antenna magnetic core portion.Can exemplify coil as wire portion.For the performance antenna function, can take in the wire portion of coiled type, the make of antenna magnetic core portion insertion.By wire portion power supply to coiled type, at inner generation of antenna magnetic core portion and the corresponding magnetic flux of this electric current, thereby form a magnetic field in the space, become the antenna of signal emission usefulness.Perhaps, when receiving electric wave signal, on the wire portion of coiled type, the corresponding electric current of formed magnetic flux in generation and the antenna magnetic core portion, thus become the antenna that signal receives usefulness.

The shape of antenna magnetic core portion does not have particular restriction.Can be the rhabdions such as plate body, square rod or pole of gusset shape.It is the mode of base material that antenna magnetic core portion can adopt with ferriferous oxides such as ferrites.The soft-magnetic body of the band conductivity that antenna magnetic core portion is provided with can exemplify that at least a portion is the mode of conductive layer in soft-magnetic body.In this case, conductive layer can be by material such as the steel plate that possesses good magnetic permeability, silicon steel plate, amorphous soft magnetic material and soft magnetism nanocrystals.

And it is base material that antenna magnetic core portion can adopt ferrite, and antenna magnetic core portion surface at least a portion is provided with conductive layer.The conductive layer material can adopt the material that possesses conductivity.As conductive, can adopt a kind of such as in nickel, nickel alloy, chromium, evanohm, aluminium, aluminium alloy, copper, copper alloy, titanium, the titanium alloy etc. at least.

If consider (1 formula) that the back will be narrated, for reducing the antenna part loss, the material that constitutes conductive layer preferably adopts the material that conductivity is low and magnetic permeability is low.Therefore, can adopt nonmagnetic metal.Simultaneously, according to the environment for use situation, can adopt the good material of corrosion resisting property.

Conductive layer can adopt band conductive membrane or paillon foil mode.When adopting the film mode, can utilize film-forming process such as evaporation, sputter, ion plating and plating method, on the surface of antenna magnetic core portion, make film.When adopting the paillon foil mode, can paillon foil be sticked on antenna magnetic core portion surface by bonding agent; Under the paillon foil mode,,, thereby need be provided with in order to the fixing parts of paillon foil because paillon foil will carry out bending or distortion if when forming with antenna magnetic core portion non-integral.And, can suppress the distortion and the bending of paillon foil, thereby improve the stability of paillon foil if with whole integrated the sticking in the antenna magnetic core portion of paillon foil.Help the thin-walled property of paillon foil like this, and help reducing aerial loss.

The thickness of conductive layer can suitably be selected according to the magnetic permeability, conductivity and the used factors such as wave frequency that constitute conductive layer, and for example, its thickness can adopt 0.1-500 μ m, 0.1-100 μ m, 1-50 μ m.The lower limit of conductive layer thickness can exemplify 0.2 μ m, 0.5 μ m, 1 μ m, 2 μ m, and the higher limit of conductive layer thickness can exemplify 100 μ m, 500 μ m, 1000 μ m, but need not to be defined in this.Also can adopt, be provided with the mode of conductive layer on the surface of antenna magnetic core portion.

If, can reduce the loss of antenna when conductive layer thickness carries out signal emission than this antenna or the epidermal area thickness δ of the frequency electric wave that receives when also thin.Therefore, in order to reduce the loss of antenna, epidermal area thickness δ is preferably thin.Epidermal area thickness δ is meant the distance the when electromagnetic field decay that incides on certain material arrives 1/e (e ≈ 2.718).Here, when magnetic permeability is that μ, conductivity are that σ (σ=1/ ρ), angular oscillation frequency are ω (ω=f/ π, f is frequency), then epidermal area thickness δ can represent with following (1) formula.

δ=(2/ μ σ ω) 1/2 ... ... (1 formula)

So magnetic permeability μ, conductivity, frequency f are low more, epidermal area thickness δ is just thick more.Otherwise magnetic permeability μ, conductivity, frequency f are high more, and its epidermal area δ is just thin more.Therefore, under same thickness, if will reduce the loss of antenna, the mode that conductive layer can adopt the low nonmagnetic metal of conductivity and help increasing resistance value forms.

With ferriferous oxides such as ferrites is base material, and the press-powder body after its powder is reinforced carries out sintering, when making antenna magnetic core portion, as antenna magnetic core portion surface not being ground, tends to occur small concavo-convex phenomenon.Like this, small concavo-convex if the surface of antenna magnetic core portion exists, influenced by this, the conductive layer of stack in antenna magnetic core portion also is easy to form small concavo-convex.Help increasing the surface area of conductive layer, and then increased the electrode area of sensor electrode, the sensitivity that improves transducer.Therefore, the surface of antenna magnetic core portion can be ground as required.

And when conductive layer becomes one when whole with antenna magnetic core portion stack, even antenna magnetic core portion is sustaining damage, the existence of conductive layer also can obtain the effect that prevents to occur a large amount of cracks in antenna magnetic core portion.

Simultaneously, can for example opposed parts be arranged on the opposite of conductive layer, enter the space for what the detected object thing entered so that between opposed parts and conductive layer, form one.Conductive layer and opposed parts can be directly opposed across entering the space.Perhaps, when disposing miscellaneous part between conductive layer and opposed parts, conductive layer and opposed parts also can be opposed across entering the space.Opposed parts can adopt conductive material to make.Opposed parts preferably can ground connection.Opposed parts also can use the antenna assembly matrix itself that is equipped with belt sensor.When being applied on the structures such as vehicle or building,, can adopt structures itself (comprising a body) such as car body or building as matrix.Ordinary circumstance, car body itself needs ground connection.Simultaneously, control part emission or reception are for the signal of telecommunication of the wire portion of antenna magnetic core portion.The mode that control part adopted is will carry out signal of telecommunication emission or antenna service time of receiving, the two successively staggered service time with the transducer that conductive layer is used as sensor electrode to wire portion on time set.Like this, the service time of antenna and the service time of transducer are successively staggered, will help reducing noise.What is called staggers antenna service time and transducer service time, is meant in time, is in the service time of antenna and the service time of transducer the time period inequality.As long as exist part to separate, both also can partially overlap.

Handle apparatus is to be handled by the arm of human body or robot.Typical handle apparatus can exemplify door handle device (comprise door handle, door turn round).As handle, can be the mode of drawing, the mode that pushes away or the mode of rotation.During as handle apparatus, opposed parts can be installed on the structure main bodys such as vehicle of being furnished with handle apparatus, also can be installed on other positions outside the main body.

Especially according to judging that static capacity changes when having detected not near the detected object thing, have static capacity, can will constitute by ferrite and be disposed at the lip-deep conducting film of antenna magnetic core portion or conductive foil uses as conductive layer for making electrode.At this moment, conductive layer becomes the electrode of transducer.When sensor electrode and detected object thing had more greatly over against area, static capacity increased, and is easy to detect.Therefore, sensor electrode can be arranged on the antenna magnetic core portion right opposite relative with the detected object thing all.

About door handle device, owing to be equipped with the antenna assembly that possesses above-mentioned electrostatic capacity type sensor electrode, applicable to carrying out handshaking between portable machine that carries the user and the door, confirm the locking of opposite house after my identity and the control system of unblanking to control by portable machine.Under this situation, can realize the user as long as hand is put on the door handle, can carry out automatic perception, open door lock; When hand leaves door handle, promptly lock the so-called keyless entry device of door lock.Door handle is the key position of design, and the device that is assemblied in its inside wishes to accomplish as far as possible miniaturization.For this reason, the antenna assembly of belt sensor electrode being made integrated, is very necessary; Simultaneously must guarantee that also midget plant possesses the higher detection sensitivity and the performance of antenna.

Embodiment

(first embodiment)

Following according to Fig. 1, the first embodiment of the present invention is described.The antenna assembly that has transducer 1 in the present embodiment is equipped with the antenna part 2 for emission usefulness.As shown in Figure 1, antenna part 2 is by being provided with the antenna magnetic core portion 5 that possesses magnetic conductivity, and the wire portion 6 that is attached in the antenna magnetic core portion 5 is formed.And, on the antenna assembly that has transducer 1 in the present embodiment, be equipped with 5 opposed opposed parts 3, and of forming enters space 4 for what detected object thing 7 entered between opposed parts 3 and antenna magnetic core portion 5 with antenna magnetic core portion.Opposed parts 3 are made tabular by the material that possesses electric conductivity (for example: iron series, cobalt series, nickel series, aluminium series etc.).Opposed parts 3 are across entering space 4, and portion 5 is mutually opposed with the antenna magnetic core, again through earth connection 30 ground connection.Opposed parts 3 have required regulation area, and are configured along antenna magnetic core portion 5 directions.Opposed parts 3 are made of the matrix (being door body during vehicle) of the antenna assembly 1 that is used for the support belt transducer.

As shown in Figure 1, antenna magnetic core portion 5 has good magnetic permeability, and possesses conductivity.Antenna magnetic core portion 5 is made of the soft-magnetic body 51 that possesses laminated construction.51 of soft-magnetic bodies are by a plurality of magnetic chips 50 that will have conductivity and high magnetic conductivity, along its thickness direction, keep a determining deviation stack to form.Every magnetic chip 50 is all very thin, constitutes the soft-magnetic body 51 of laminated construction behind the stack, thereby forms the face shaping of the magnetic core of antenna part 2.And, if soft-magnetic body 51 has the laminated construction of magnetic chip 50, then when on magnetic chip 50, producing vortex flow,, the eddy current loop is dwindled along the stack direction of magnetic chip 50, this will help reducing the loss of eddy current.Though the thickness of magnetic chip 50 can suitably be selected, but if will consider under high frequency, to reduce eddy current loss, then magnetic chip thickness can remain on below the 1000 μ m, can exemplify particularly that 500 μ m are following, 100 μ m following, below the 50 μ m, and the lower limit of thickness selects can be 0.01 μ m.

On the surface of entire antenna magnetic core portion 5 or each magnetic chip 50, can cover a diaphragm seal that resistance is big and sealing is high as required.Like this, even under adverse circumstances, use, also can guarantee the durability of entire antenna magnetic core portion 5 or magnetic chip 50.Especially extraneous foreign matter (water, iron powder, carbon dust etc.) is being arranged when existing, can play the effect of protection antenna magnetic core portion 5, helping improving the endurance quality of electrostatic capacitance sensor.

The material of magnetic chip 50 can adopt the lower soft magnetic material of coercive force.Soft magnetic material can exemplify amorphous soft magnetic material or soft magnetism Nanocrystalline materials.These materials possess electric conductivity, and magnetic permeability and high frequency characteristics are good, and are very favourable to high performance and miniaturization.The amorphous soft magnetic material can exemplify iron series, cobalt series etc.The soft magnetism Nanocrystalline materials can be by at least a kind from iron, cobalt, nickel, and with from titanium, zirconium, hafnium, vanadium, niobium, molybdenum, chromium, tungsten, tantalum, manganese at least a kind, and the following ultramicro-crystal grain of 500 dusts constitutes.

According to present embodiment, can be as required, bag is carried out the bigger film of one deck resistance value on the surface of entire antenna magnetic core portion 5 or each magnetic chip 50.As the film of Bao Lvda resistance on the surface of each magnetic chip 50, can make that along on the thickness direction of magnetic chip 50, the generation in eddy current loop is restricted, thereby the loss of eddy current is reduced.The film that resistance value is bigger can adopt the film of organic series or the film of inorganic series.For example, can adopt the diaphragm of phosphoric acid series, ferrous acid iron diaphragm etc.

According to present embodiment, can be with deformable layer 56 between constituting antenna magnetic core portion 5 and constituting between the magnetic chip 50 of laminated construction soft-magnetic body 51.Like this, can improve the deformation resistance and the protectiveness of magnetic chip 50.Deformable layer 56 can exemplify soft material layer and air layer.The soft material layer can exemplify rubber-like parts (as rubber or soft resin etc.).

Wire portion 6 on the antenna part 2 is assemblied on the laminated construction soft-magnetic body 51 of antenna magnetic core portion 5.Specifically, as shown in Figure 1, in wire portion 6, the outside that constitutes the laminated construction soft magnetic bodies 51 of antenna magnetic core portion 5 be equipped with by the winding 60 of capable one-tenths of coil winding and be communicated with it and conduct electricity extend part 62.Winding 60 is reeled the bag shoe on magnetic chip 50A described later from the outside.The part 62 that extends on the wire portion 6 is electrically connected with power supply 64 and control part 65.Power supply 64 preferably uses AC power.

As shown in Figure 1, in a plurality of magnetic chips 50 of forming laminated construction soft-magnetic body 51, with the magnetic chip 50A of opposed parts 3 opposed formation conductive layers except that possessing soft magnetism, also possess conductivity.Magnetic chip 50A can play the function of static capacity type sensor electrode, and is electrically connected with the test section 52 of detecting electrostatic capacitance on circuit.Test section 52 can apply voltage simultaneously between magnetic chip 50A and opposed parts 3, and as the static capacity type sensor electrode, possesses the function of the static capacity that detects magnetic chip 50A.The transducer of test section 52 and electrostatic capacitive is made according to capacitance principle, and can the dielectric of broad scope such as metallic object or human body be detected.

Because the area of magnetic chip 50A and opposed parts 3 is bigger, this is highly beneficial to guaranteeing static capacity.Simultaneously, as long as can constitute the transducer of electrostatic capacitive, the area of magnetic chip 50A and opposed parts 3 can be identical, also can be different.

In antenna magnetic core portion 5, as the close transducer magnetic chip 50A of detected object thing, that is: enter between the magnetic chip 50A of antenna magnetic core portion 5 and the opposed parts 3 formed when entering space 4 when detected object thing 7, because of being subjected to the influence of the ratio dielectric constant of detected object thing 7, test section 52 will detect the variation that static capacity produces.Therefore, can judge whether the existence of detected object thing 7 or detected object thing 7 be good according to the variation of static capacity.Detected object thing 7 can be objects such as human or animal's live body or manipulator that operation is used or parts, card, or liquid such as rainwater.

According to present embodiment, opposed parts 3 are arranged near the antenna magnetic core portion 5 after earth connection 30 carries out ground connection.And the formed spatial volume amplitude that enters space 4 satisfies the size of regulation between the magnetic chip 50A of antenna magnetic core portion 5 and the opposed parts 3.Since with enter detected object thing 7 that space 4 has differing dielectric constant and be configured in and enter in the space 4, thereby enter the 7 occupied volumes of detected object thing in the space 4 and become big, thereby be beneficial to the variation of guaranteeing conductivity, and then improve sensitivities as static capacity type sensor.

Control part 65 possesses the function of outwards launching electric wave from antenna part 2.

During use, provide alternating current to the wire portion 6 of the antenna part 2 of launching electric wave, rely on the electric field and the action of a magnetic field that are produced, form electromagnetic wave, from antenna part 2 emission electric wave signals by power supply 64.Under the state of antenna part 2 emission electric waves, when the detected object object 7 that carries electron key (human body or object) was close, electron key etc. promptly received electric wave.Because the receiving system that omits among the figure has received the electric wave that electronic lock is launched, therefore detect the approaching of detected object thing 7.Like this, according to the electric wave that electronic lock is launched, (for example: the authentication of user's authentication, the detected object things such as authentication of parts), detect detected object object 7 and whether register in advance just can carry out ID identification authentication.

And as the magnetic chip 50A of detected object thing 7 near antenna magnetic core portion 5, that is, when detected object thing 7 entered space 4, static capacity changed, and therefore can judge the existence of above-mentioned detected object thing 7 or not good.By possessing the soft-magnetic body 51 of electric conductivity and soft magnet performance in the antenna magnetic core portion 5 that effectively utilizes antenna part 2, can make the transducer of the electrostatic capacitive that human body or inspected object use.

For example, be assemblied on the door handle device in the present embodiment and be equipped with the antenna assembly 1 of transducer to be illustrated relating to.At this moment, owing to wire portion 6 power supplies of power supply 64, and make antenna part 2 launch electric wave to antenna part 2.Under the state of antenna part 2 emission electric waves, when the user who carries electron key is close, but the electric wave that electron key reception antenna portion 2 emits.Because the electron key receiving system receives the electric wave of emission, therefore, when detecting the user, can carry out ID identification authentication to this user near door handle device.So-called ID identification authentication (user's identification authentication) is meant and judges whether the user registers in advance.

When ID identification authentication determination went out to be registered accredited personnel, door can descend the switch motion of example.That is, user's finger is near the antenna magnetic core portion 5 that is used for door handle operation, that is to say that the finger as the user extend into when entering space 4, enters space 4 interior static capacities and changes immediately, detects the intention that the user has the switch door.Therefore, make the door lock assembly action of omitting among the figure, open the lock of door gear.If when going out not to be the registration personnel through ID identification authentication determination, even the antenna magnetic core portion 5 of the close actuating doors handle of user's finger, this door gear still keeps the state of locking not open.As mentioned above, antenna part 2 is carrying out ID authentication by electric wave signal, and after being satisfied according to 2 conditions that the static capacity change-detection goes out user's the intention of opening the door, door handle device just can be unblanked.

According to present embodiment, in a plurality of magnetic chips 50 of the laminated construction soft-magnetic body 51 that constitutes antenna magnetic core portion 5,,, be not limited to this though be electrically connected with the test section 52 of detecting static capacity in the face of the magnetic chip 50A of opposed parts 3.Except that the magnetic chip 50A that constitutes laminated construction soft-magnetic body 51, also can be electrically connected with other magnetic chips 50 of detection.In this case, other magnetic chips 50 that are electrically connected with test section 52 also can become the electrode of transducer.

And, according to present embodiment,, be not limited to this though be provided with opposed parts 3 through earth connection 30 ground connection, also can adopt the earth (earth) ground connection itself, to substitute opposed parts 3.

(second embodiment)

Fig. 2 has represented second embodiment.Second embodiment and first embodiment constitute upward basic identical.To possessing the common functions parts, pay shared symbol.Below, only different piece is stressed.The antenna assembly that has transducer 1 in the present embodiment is equipped with for the antenna part 2 that receives usefulness.As shown in Figure 2, antenna part 2 is made up of antenna magnetic core portion 5 and the wire portion 6 that is attached in the antenna magnetic core portion 5.Wire portion 6 on the antenna part 2 is attached on the soft-magnetic body 51 of antenna magnetic core portion 5 laminated construction.Specifically as shown in Figure 2, be equipped with winding 60 on the wire portion 6 and extend part 62.Winding 60 is wound in the antenna magnetic core portion 5, extends part 62 and is electrically connected with winding 60.Extending on the part 62 of wire portion 6, be connected with demodulator probe 68 and control part 65.

During use, the electric wave that antenna part 2 receives from the outside.Therefore, when the detected object things such as electron key (for example human body or object) that carry the emission electric wave are close, antenna part 2 receives electric wave, thereby detect the close of detected object thing 7, then, as the magnetic chip 50A of detected object thing 7 near antenna magnetic core portion 5, promptly, when detected object thing 7 enters into when entering space 4, the static capacities that enter in the space 4 promptly change, thereby can judge whether the existence of above-mentioned detected object thing 7 or its be good.

(the 3rd embodiment)

Fig. 3 has demonstrated the 3rd embodiment.The 3rd embodiment and first embodiment constitute upward basic identical.Possessing on the common functions position, paying shared symbol.Below, only different piece is stressed.On the antenna assembly 1 of the belt sensor in the present embodiment, be provided with emission and the antenna part 2 that receives dual-purpose.As shown in Figure 3, it is provided with antenna magnetic core portion 5 and the wire portion 6 in the antenna magnetic core portion 5.The wire portion 6 of antenna part 2 is assemblied in the antenna magnetic core portion 5.Specifically as shown in Figure 3, wire portion is provided with the winding 60 that is wound in the antenna magnetic core portion 5, and be electrically connected with winding 60 extend part 62.Extend and connecting control part 65 on the part 62, and by the switching function of switch 67, demodulator probe 68 and power supply 64 can switch connection.When switch 67 and the 1st contact 68a, 68b connection, wire portion 6 promptly is electrically connected with power supply 64, and therefore, antenna part 2 can be for the emission electric wave.If when switch 67 and the 2nd contact 69a, 69b connected, wire portion 6 was electrically connected with demodulator probe 68, therefore, antenna part 2 can be for receiving electric wave.

(the 4th embodiment)

Fig. 4 has represented the 4th embodiment.The 4th embodiment and first embodiment constitute upward basic identical.Possessing on the common functions position, paying shared symbol.Below, only different piece is stressed.According to the various embodiments described above, as shown in Figure 4, control part 65 on time set, antenna TA service time that the wire portion 6 of antenna part 2 is carried out signal of telecommunication emission or receives, and transducer TC service time that uses as electrostatic transducer, the two successively staggers.That is to say that as shown in Figure 4, the wire portion 6 of antenna part 2 is carried out signal of telecommunication emission or TA service time of the antenna part that receives, transducer TC service time with using as electrostatic transducer does not overlap in time, and respectively in different time services.Therefore, when antenna part 2 performance antenna functions, static capacity type sensor is an off-state.Otherwise when antenna part 2 was brought into play function as static capacity type sensor, antenna function was in off-state.Do like this and help controlling generating noise.Antenna TA service time that also wire portion 6 to antenna part 2 can be carried out signal of telecommunication emission or receive, and transducer TC service time that also opposed parts 3 can be used as electrostatic transducer, separate fully, according to circumstances, when guaranteeing in time to exist part to separate, also can make the time of the two have coincidence.

(the 5th embodiment)

Fig. 5～Fig. 7 has represented the 5th embodiment.The 5th embodiment and first embodiment constitute upward basic identical.Possessing on the common functions position, paying shared symbol.Below, only different piece is stressed.Present embodiment is applicable to that the car door of installing on to car body opens and closes the door handle device 100 of usefulness.Door handle device 100 is provided with the door handle 101 of available finger manipulation, and door handle 101 is installed on the Assembly rail 102x on the car body.Interregional being formed with of stretching into for finger between door handle 101 and door body enters space 4.Internal configurations at door handle 101 has antenna part 2.As mentioned above, during use, the electric wave of ID identification authentication usefulness is carried out in antenna part 2 emissions or reception for the user.Therefore, be under the user ID identification authentication state, when detected user's finger stretches into when entering space 4, the static capacity that enters in the space 4 promptly changes, can determine the existence of finger and detect the user intention of opening car door is arranged, like this, the door lock assembly of not indicating in the drawings is activated, thereby opens motor vehicle door arrangement.

As Fig. 6, shown in Figure 7, antenna magnetic core portion 5 be by a plurality of magnetic chips 50 along its thickness direction, keep at interval stack to form.The integral body of antenna magnetic core portion 5 is embedded in the module portion 8 with winding 60 integral body.Do humidity resistance, impact resistance and the flexility that can improve magnetic chip 50 like this.There is deformable air layer 80 each other in magnetic chip 50.Can guarantee the deformation resistance of magnetic chip 50 like this,, also can guarantee protectiveness antenna magnetic core portion 5 even be subjected to the effect of external force load.The thickness of air layer 80 will approach as far as possible, and in fact magnetic chip 50 also can contact each other.Fig. 6 is a cutaway view.In fact the sheet number of magnetic chip 50 is a lot.

(the 6th embodiment)

Fig. 8 has represented the 6th embodiment.The 6th embodiment and first embodiment constitute upward basic identical.Possessing on the common functions position, paying shared symbol.Below, only different piece is stressed.As shown in Figure 8, entire antenna magnetic core portion 5 is with winding 60, and integral body is embedded in the module portion 8.Simultaneously, between magnetic chip 50, be equipped with deformable soft material layer 83.Soft material layer 83 is as a whole with 8 one-tenth in module portion, is connected on the magnetic chip 50.Therefore, can guarantee the deformation resistance of magnetic chip 50,, also can guarantee protectiveness antenna magnetic core portion 5 even be subjected to the effect of external force load.Soft material layer 83 can adopt rubber or soft resin to make, for example polyurethane series, epoxy resin series, silicon series etc.Fig. 8 is a cutaway view, and in fact the sheet number of magnetic chip 50 is a lot.

(the 7th embodiment)

Followingly the seventh embodiment of the present invention is described with reference to Fig. 9～Figure 12.Fig. 9 has represented antenna magnetic core portion 5.Antenna magnetic core portion 5 is that the soft magnetic material by oxide series is constituted, be exactly specifically ferrite with ferriferous oxide as base material, sintering after with powder compact the press-powder body and make.Because ferrite is made up of ferriferous oxide, therefore, cost of material is cheap, can make various shapes after being shaped.As ferrite, can use Cu-EN ferrite, Ni-Zn ferrite, Cu-Zn-Mg ferrite, Mn-Zn ferrite etc.Wherein except that the Mn-Zn ferrite, other ferritic electricalresistivitys are general all more than 104 Ω cm, and resistance value is big, and electric conductivity is low.The ferritic electricalresistivity of Mn-Zn is generally 1～103 Ω cm, and resistance is relatively low.

Utilize film-forming process such as sputter, vacuum evaporation or plating, can be on the surperficial 5a of the antenna magnetic core portion 5 that constitutes the gusset shape with the metal film stack, and this metal film used as conductive layer 50E (sensor electrode).The thickness of conductive layer 50E is 0.1～0.4 μ m.Conductive layer 50E also can make of metals such as Ni-Cr or Ni-Cr-Si.For example, conductive layer 50E can make of metals such as Ni-80at.%Cr or Ni-50at.%Cr-5at.%Si.It constitutes as shown in Figure 9, and in the antenna magnetic core portion 5 that forms with ferrite, conductive layer 50E forms on its integral surface 5a.Surface 5a is a rectangle.

By the film formed conductive layer 50E of metal, it is identical with the epidermal area thickness δ that calculates by above-mentioned (1 formula) that its thickness can be made as, and perhaps slightly thin than it, aerial loss will reduce like this.In the present embodiment, not only can be on the surperficial 5a of antenna magnetic core portion 5 with the conductive layer 50E direct forming of film like, and, also can use bonding agent that metal forming is directly pasted on the surperficial 5a of antenna magnetic core portion 5,50E uses as conductive layer.

Close along with the detected object thing, when when being used as the sensor electrode that detects the static capacity variation and using by metal film or by the conductive layer 50E that metal forming forms, the static capacity of this sensor electrode is directly proportional with the electrode area of sensor electrode and the dielectric constant of detected object thing basically, and the distance between the detected object thing is inversely proportional to.Therefore, utilize the variation of this static capacity, in the interval of certain scope, have or not the static capacity type sensor of detected object thing to use as detection.Like this, when using as static capacity type sensor, the surface area of the sensor electrode of being formed by conductive layer 50E, the end detection sensitivity that its surface area is big is higher.Therefore, preferably will be arranged on the surperficial 5a of antenna magnetic core portion 5 by the conductive layer 50E covering that metal film or metal forming are formed.

Figure 10 has represented solenoid coil is wound on around the antenna part 5 that is provided with conductive layer 50E, the cutaway view of the state when constituting the wire portion 6 of coiled type.Figure 10 has expressed the pattern in a kind of antenna assembly 1 that above-mentioned antenna magnetic core portion 5 is applied to belt sensor.As shown in figure 11, the antenna assembly 1 of belt sensor is equipped with antenna part 2.Antenna part 2 is by the formed whole shape antenna magnetic core of the ferrite that possesses magnetic conductivity portion 5, and the wire portion 6 that is attached to the coiled type in the antenna magnetic core portion 5 is formed.

The wire portion 6 of antenna part 2 is attached in the antenna magnetic core portion 5.Specifically, wire portion 6 is provided with winding 60 and extends part 62.Winding 60 is located at the outside of antenna magnetic core portion 5, through repeatedly turning to coil shape, and extends part 62 and is electrically connected with coiler part 60.Be connected to control part 65 on the part 62 extending of wire portion 6.As shown in figure 11, in the present embodiment, the antenna assembly 1 of belt sensor is equipped with opposed parts 3.Opposed parts 3 are mutually opposed with the conductive layer 50E of antenna magnetic core portion 5 so that its and antenna magnetic core portion 5 between form and can enter space 4 for what the detected object thing entered.Opposed parts 3 are made into tabular by the material that possesses conductivity (for example iron series, cobalt series, nickel series, aluminium series etc.).Opposed parts 3 are across entering space 4, and are mutually opposed with the conductive layer 50E of antenna magnetic core portion 5, again by earth connection 30 ground connection.Opposed parts 3 possess the area of defined, and are configured along antenna magnetic core portion 5.Opposed parts 3 also can be made of the matrix (can be a body during vehicle) of the antenna assembly 1 of supporting strap transducer.

As shown in figure 11, the conductive layer 50E of stack in antenna magnetic core portion 5 possesses conductivity, can be used as the static capacity type sensor electrode and plays effectiveness, and simultaneously, it is electrically connected with the test section 52 of detecting static capacity.When test section 52 when detecting electrostatic capacitance, between conductive layer 50E and opposed parts 3, apply voltage in, also can play the effectiveness of the static capacity that detects conductive layer 50E as the electrostatic capacitive electrode.Test section 52 and static capacity type sensor have been used the capacitor principle exactly, with the dielectric of broad scope such as metallic object or human body as the detected object thing.Because the area of conductive layer 50E and opposed parts 3 is bigger, therefore help guaranteeing electrostatic capacitance.In addition, conductive layer 50E and opposed parts 3 areas can be identical, also can be inequality, as long as key is to constitute static capacity type sensor.

In the antenna magnetic core portion 5, as the detected object thing near as the conductive layer 50E of sensor electrode the time, promptly, in antenna magnetic core portion 5, what conductive layer 50E and opposed parts 3 were constituted enters in the space 4, when detected object thing 7 enters, be subjected to the influence of the dielectric constant of detected object thing 7, test section 52 detects the variation that the electrostatic capacitance amount takes place.Therefore, according to the variation of static capacity, can judge whether the existence of detected object thing 7 or its be good.Detected object thing 7 can be the human body of human body or animal body, or is made for liquids such as the mechanical hand of industry usefulness, object such as parts or card and rainwater.

According to present embodiment, through the opposed parts 3 of earth connection 30 ground connection be set at antenna magnetic core portion 5 near, in the antenna magnetic core portion 5 between conductive layer 50E and the opposed parts 3 the formed spatial volume amplitude that enters space 4 be defined in institute's sizing.With enter detected object thing that space 4 has dielectric constant inequality and be present in and be configured in when entering in the space 4, enter the 7 occupied volumes of detected object thing in the space 4 and become big, thereby be beneficial to the variation of guaranteeing conductivity, and then improve sensitivities as static capacity type sensor.

In use, owing to supply in the wire portion b of antenna part 2 that electric current is arranged, the electric field of generation and magnetic field promptly form electromagnetic wave, outwards launch electric waves from antenna part 2.Be under the state of antenna part 2 emission electric waves, when the detected object thing 7 that carries electron key near the time, electron key receives electric wave.When receiving the electric wave of electron key emission, can detect the approaching of detected object thing 7 by the receiving system of not indicating in the drawings.Like this, according to the electric wave that electronic lock is launched, (for example: the authentication of user's authentication, the detected object things such as authentication of parts), judge whether detected object object 7 registers in advance just can carry out ID identification authentication.So-called ID identification authentication (user's identification authentication) is meant and judges whether the user registers in advance.

In addition, when detected object thing 7 during near the conductive layer 50E of antenna magnetic core portions 5, that is, the detected object thing enters into when entering space 4, because static capacity changes, thereby is whether the existence of the above-mentioned object 7 of decidable or its be good.Effectively utilize the conductive layer 50E of stack in the antenna magnetic core portion 5 of antenna part 2, can constitute the static capacity type sensor of using for human body or object.

For example: when being equipped with the antenna assembly 1 of belt sensor on the door handle device, be explained as follows.In this case, owing to supply that electric current is arranged in the wire portion 6 of antenna part 2, thereby can outwards launch electric wave signal from antenna part 2.Being under the state of antenna part 2 emission electric waves, when the user who carries electron key is close, but the electric wave that electron key reception antenna portion 2 is launched.After receiving system receives the electric wave of electron key emission, detecting the user, this user is being carried out ID identification authentication near in the door handle device.When by ID identification authentication, be judged to be when being the personnel of registered registration, door just can carry out following on-off action.That is to say, when user's finger when being used for the antenna magnetic core portion 5 of actuating doors handle, promptly, user's finger extend into when entering space 4, because the static capacity that enters in the space 4 changes, thereby detect the intention that the user has shutter door, therefore, the door lock assembly of not indicating in the drawings starts and is opened.If by ID identification authentication, judge when not being the personnel of registered registration that even user's finger is when being used for the antenna magnetic core portion 5 of actuating doors handle apparatus, this door gear still keeps lock-out state.As mentioned above, antenna part 2 is carrying out ID authentication by electric wave signal, and goes out the user according to the static capacity change-detection and open the door after 2 conditions of intention are satisfied, and door handle device just can be unblanked.

According to above embodiment, as shown in figure 12, control part 65 carries out the wire portion 6 of antenna part 2 antenna TA service time of signal of telecommunication emission or reception on time set, and with the transducer service time TC of opposed parts 3 as the electrostatic transducer use, the two successively staggers.In other words, as shown in figure 12, in the different time, make the wire portion 6 of antenna part 2 carry out antenna TA service time that the signal of telecommunication is launched or received, and overlapping does not appear in transducer TC service time of opposed parts 3 power supplies.Therefore, antenna part 2 is when the performance antenna function, and static capacity type sensor is in off-state, otherwise when antenna part 2 performance static capacity type sensor functions, its antenna function is in off-state.To help controlling generating noise like this.The wire portion 6 of antenna part 2 is carried out antenna TA service time that the signal of telecommunication is launched or received, and, carry out after separating fully transducer TC service time that opposed parts 3 use as electrostatic transducer.According to different situations, time set is as long as there is the time period that does not overlap in time.According to present embodiment, though be provided with opposed parts 3, be not limited to this through earth connection 30 ground connection, also can adopt the earth (earth) ground connection itself, to substitute opposed parts 3.

(experimental example)

According to aforesaid first embodiment, following experimental example 1 and experimental example 2 have been carried out.

(experimental example 1)

Constitute the ferrite of block antenna magnetic core portion 5, adopted the Ni-Zn Ferrite Material.This ferrite is ground after sintering, and it is of a size of: high 3mm, wide 5mm, long 60mm.In this antenna magnetic core portion 5, will be configured to by the film formed conductive layer 50E of metal: the oblong-shaped of wide 5mm, long 60mm size.At this moment, adopt sputter, use by Ni-50at.%Cr-5at.%Si formed to electrode (target) film forming, during film forming near the antenna magnetic core portion 5 and the thickness of film forming on glass substrate measure, calculate the thickness of conductive layer 50E.The thickness of conductive layer 50E is 0.40 μ m, and the resistivity of conductive layer 50E is 80 μ Ω cm.Though have concavo-convex more than the 0.40 μ m on the surface of the antenna magnetic core portion 5 that ferrite forms, the function of electrostatic capacitance sensor can not be affected.And, when using as antenna, pass through under the situation of coiled type wire portion 6 at the electric current that 134KHz is arranged, the electric field strength that produces in the end of the distance antenna magnetic core 5 about 3m of portion is 87dB μ V/m, situation with use not the antenna assembly that constitutes with conductive layer and by ferrite as sensor electrode acts on identical.

(experimental example 2)

Constitute the ferrite of block antenna magnetic core portion 5, adopt the Ni-Zn Ferrite Material.Through attrition process, it was of a size of: high 3mm, wide: 5mm, long 60mm after this was ferrite sintered.On the two sides of this antenna magnetic core portion 5, will be formulated as wide 5mm, long 60mm oblong-shaped by the film formed conductive layer 50E of metal.Electrode is made up of Ni-50at.%Cr-5at.%Si, and is used spatter film forming.During film forming near the thickness that is in the antenna magnetic core portion 5 and be formed on the glass substrate is measured, to calculate the thickness of conductive layer 50E.The thickness of the conductive layer 50E that forms on the two sides of antenna magnetic core portion 5 is 0.40 μ m, and resistivity is 80 μ Ω cm.Though, on the ferrite surface that constitutes antenna magnetic core portion 5, existing concavo-convex more than the 0.40 μ m, when using as electrostatic capacitance sensor, all can normally play effectiveness in its two sides.In addition, when using as antenna, pass through under the situation of coiled type wire portion 6 at the electric current that 134KHz is arranged, the electric field strength that produces at distance antenna magnetic core portion 5 about 3m places is 87dB μ V/m, situation with use not the antenna assembly that constitutes with conductive layer and by ferrite as sensor electrode acts on identical.

(the 8th embodiment)

Figure 13 shows and has showed the 8th embodiment.Basic identical on the formation of the 8th embodiment and first embodiment, possessing on the common functions position, pay shared symbol.Below, only different piece is stressed.Block antenna magnetic core portion 5, when being shaped as the lower soft magnetic material of Mn-Zn ferrite constant resistance coefficient, as shown in figure 13, can after forming the insulating barrier 5r that forms by insulant on the surperficial 5a of antenna magnetic core portion 5, conductive layer 50E be formed on the insulating barrier 5r.At this moment, because conductive layer 50E relies on insulating barrier 5r to obtain insulation effect, thus, can guarantee the good efficacy of the sensor electrode that constituted by conductive layer 50E.

(the 9th embodiment)

Figure 14 has represented the 9th embodiment.The 9th embodiment and first embodiment constitute upward basic identical, are possessing on the common functions position, pay shared symbol.Below only to stressing with first embodiment part inequality.According to present embodiment, as shown in figure 14, conductive layer 50E by the surperficial 5a of antenna magnetic core portion 5 and with surperficial 5a surperficial 5b dorsad on integrated stack form.Like this, conductive layer 50E and 50B are opposing, are wound with the wire portion 6 of coiled type around conductive layer 50E and 50B.Two conductive layer 50E and 50B can be used as sensor electrode and use.Here, conductive layer 50E and 50B also can independently separately constitute static capacity type sensor, perhaps, by both connect with conductive layer 50E, 50B, can constitute shared static capacity type sensor.

(the tenth embodiment)

Figure 15 has represented the tenth embodiment.The tenth embodiment has identical formation and identical action effect basically with first embodiment.Below only to stressing with first embodiment part inequality.As shown in figure 15, in the set antenna assembly 1, whole stack has conductive layer 50E on the surperficial 5a of antenna magnetic core portion 5.As shown in figure 15, by the antenna magnetic core portion 5 that ferrite constitutes, only on its surperficial 1a, dispose the conductive layer 50E that metallic film constitutes.The surface of this conductive layer 50E is pasted with terminal 80f, the conductive layer 50E of transducer use and the terminal 80f that transducer is used, so says, and can be the aluminum steel of 100 μ m directly by line, adopt so-called wire bonding to connect.Certainly also be not limited to adopt wire bonding,, also can use conductive adhesive that terminal 80f is assemblied in connected mode in the antenna magnetic core portion 5 according to environment for use.For the wire portion 6 with coiled type is wound on the outside of antenna magnetic core portion 5, the coil bobbin 82f that is formed from a resin can be assemblied in the antenna magnetic core portion 5, the lead 6 of coiled type is wound on this bobbin 82f finishes again.Simultaneously, be provided with the terminal 83f that is used for fixing winding wire portion 6 in resin system bobbin 82f both sides.Constitute the wiring 84f that the conductive layer 50E of sensor electrode uses with terminal 80f and transducer by transducer, can detect the variation of electrostatic capacitance.And, when antenna carries out the signal reception,, promptly produced induced current on the coiled type wire portion 6 because antenna magnetic core portion 5 receives signal wave.The terminal 83f that this induced current is used through coil is amplified by signal amplifier.In signal when emission,, the terminal 83f that transmits and use through coil is sent on the wire portion 6 of coiled type, relies on the antenna magnetic core portion 5 inner magnetic densities that produce and sends electric wave to the external world.

(the 11 embodiment)

Figure 16 has represented the 11 embodiment, and the 11 embodiment has identical formation and identical action effect basically with first embodiment.Below only to stressing with first embodiment part inequality.As shown in figure 16, handle main body 10 is provided with standing part 10h, standing part 10h is fixed on the car body 11 of vehicle such as automobile, handle main body 10 also is fixed on the car body 11 simultaneously, handle main body 10 is made of as base material the resin that does not influence the electric wave emission.As shown in figure 16, the antenna assembly 1 of above-mentioned belt sensor is installed to the inside of the handle main body 10 of door handle for vehicle.Car body 11 is made of the metal that possesses conductivity, and ground connection.The conductive layer 50E of the antenna assembly 1 of belt sensor is arranged on the opposite of the car body face 11c of car body 11, forms with it and enters space 4.Like this, when user's finger was held door handle main body 10, promptly finger extend into when entering in the space 4, and the average dielectric constant that enters in the space 4 between conductive layer 50E and ground connection car body 11 will change.Its result both can, according to the variation of static capacity, detect the approaching of user finger.

Application examples as this device, when user's finger is held handle main body 10, detect according to electrostatic capacitance change, according to this detection signal, the antenna assembly 1 of the belt sensor that is provided with in the handle main body 10 is launched the specific signal electric wave with specific wavelength (134KHz).The portable machine that receives this signal will be launched the electric wave that contains identification user signal again once more, receive above-mentioned signal by the antenna part that is installed on handle or other car body positions.At this moment, if when identifying the person of being to use, car door lock is promptly opened.Except that this situation, when car door is in the lock state, except that original key, door lock can't be opened.Therefore, this device has improved convenience and the fail safe of using.

(first application examples)

Represent the first above-mentioned application examples as Figure 17 and Figure 18.Should be applicable to the door handle device 100 that is assemblied on the car body by use-case.As Figure 17 and shown in Figure 180, door handle device 100 is provided with matrix part 101, handle 102 and spring attachment 103.Handle 102 is arranged on the matrix part 101, can carry out rotating operation along arrow B 1, B2 direction, and the user can operate with finger.Spring attachment 103 is gone up stress application in the direction of closing handle 102 along arrow (arrow B2 direction).Spring attachment 103 is made of helical spring, but is not limited to this.Form one by handle 102 and can enter space 4 for what finger stretched into.

On handle 102 position 102a, be equipped with above-mentioned antenna part 2.During use, discern the electric wave that authenticates for carrying out user ID from antenna part 2 emissions or reception.In addition, the position 102b place relative with position 102a is equipped with above-mentioned opposed parts 3 across entering space 4 in the handle 102.

Between antenna part 2 and the opposed parts 3, formed one and can enter space 4 for what finger stretched into.Therefore, when extending into as the user of object finger when entering space 4, the electrostatic capacitances that enter in the space 4 promptly change.Therefore, under the state through the ID authentication, judge the existence that enters finger in the space 4 according to the variation of electrostatic capacitance, both can detect the user has the intention of opening the door.Thus, after being started, the door lock assembly do not indicated in the drawings unblanks.As mentioned above, only satisfying according to electrostatic capacitance change, and carrying out ID identification authentication according to antenna part 2 emissions or the electric wave that receives and detect the user when these two conditions of intention of opening the door are arranged, the handle apparatus of door just can be unblanked.In addition, if door body itself possesses conductivity, then can opposed parts 3 be installed at 102b place, the position of handle 102, opposed parts can itself be made of the door body.

(second application examples)

Figure 19～Figure 21 has represented to be applied to open and close second application examples of the door handle device 100 of building door 200.Door handle device 100 is equipped with handle 101c and opposed parts 3.Handle 101c is operated by user's finger.Opposed parts 3 be arranged on handle 101c near.Between handle 101c and opposed parts 3, surround be available for users to point stretch into enter space 4, handle 101c is built-in with the antenna assembly 1 that possesses the belt sensor that antenna part 2 is arranged.The opposed parts 3 that possess conductivity carry out ground connection by figure earth connection slightly.

And in example shown in Figure 21, door handle device 100 is equipped with rotary type handle 101c and opposed parts 3.Rotary type handle 101c can be operated by user's finger, and opposed parts 3 be arranged on handle 101c near.Between handle 101c and opposed parts 3, surrounded one be available for users to point stretch into enter space 4, handle 101c is built-in with the antenna assembly 1 of the belt sensor that possesses antenna part 2.Therefore, when the user of detected object finger extend into when entering space 4, because the electrostatic capacitances that enter in the space 4 change, decidable goes out the existence of finger, and detects the user intention of opening the door is arranged.Therefore, in the present embodiment, only satisfying, and detecting the user when these two conditions of intention of opening the door are arranged according to carry out ID identification authentication from antenna part 2 emissions or the electric wave that receives according to electrostatic capacitance change, figure door lock assembly slightly just begins action, unblanks.In addition, 202 keyholes that can insert for normal key.When door 200 possesses conductivity, tabular opposed parts 3 can be installed, opposed parts 3 can itself be made of door 200.

(the 3rd application examples)

Figure 22 has represented to use the 3rd application examples of the various embodiments described above.It is applicable to judges the whether good defective products checkout gear of manufacturing works' part.As shown in figure 22, be equipped with antenna part 2 and opposed parts 3 on the antenna assembly 1 of belt sensor.Antenna part 2 is provided with by conductive layer 50E and carries out the antenna magnetic core portion 5 that stack forms, and the earth connection of opposed parts 3 through not indicating in the drawings carries out ground connection.What form between antenna part 2 and opposed parts 3 that a detected object thing 70 can pass through enters space 4.When detected object thing 70 is non-defective unit, in advance the electrostatic capacitance of this detected object thing 70 when entering space 4 measured.When the detected object thing was defective products, the electrostatic capacitance of detected object thing 70 when entering space 4 had been beforehand with imagination.So, when detected object thing 70 enters space 4, detect the electrostatic capacitance amount of detected object thing 70 according to antenna part 2 and opposed parts 3.Whether according to the electrostatic capacitance of detected object thing 70 when entering space 4, it is good to determine detected object thing 70.When detected object thing 70 is defective products, breaking part 79 will enter the outlet in space 4 and cut off, and block detected object thing 70 and enter next operation.Then, this detected object thing 70 information of belonging to defective products reports to receiving terminal by antenna part 2 emission electric waves.

(the 4th application examples)

Figure 23 has represented the various embodiments described above ground the 4th application examples.It is applicable to article detection device.As shown in figure 23, on the antenna assembly 1 of belt sensor, be equipped with antenna part 2 and opposed parts 3.Antenna part 2 is provided with the antenna magnetic core portion 5 that is formed by conductive layer 50E stack, and opposed parts 3 are in ground state.Between antenna part 2 and opposed parts 3, surrounded and to have entered space 4 for what object to be detected 72 passed through.When object to be detected 72 enters space 4, change owing to enter the electrostatic capacitance in space 4, and then detect entering of object to be detected 72.Antenna part 2 is launched electric wave immediately, reports the information that object to be detected 72 enters space 4 to receiving terminal.Simultaneously, according to electrostatic capacitance change, the object quantity that enters in the space 4 is counted, when object quantity reached regulation numerical value, antenna part 2 can send electric wave signal and inform this information.Like this, it is promptly applicable to counting device.

(other)

The present invention only is defined in the foregoing description and above-mentioned mode.For example: opposed parts 3 can carry out ground connection by earth connection, also can adopt the earth-free mode of opposed parts.In the scope that does not break away from main points of the present invention, can suitably change execution mode.From above-mentioned record, can be familiar with and realize following technological thought.

(note 1) a kind of defective products checkout gear, the antenna assembly that contains belt sensor during it constitutes, this antenna assembly is then by antenna magnetic core portion, and the conductive layer that is provided with at least a portion on above-mentioned antenna magnetic core portion surface forms, and this conductive layer can play the effect of transducer.

(note 2) a kind of article detection device, the antenna assembly that contains belt sensor during it constitutes, this antenna assembly is then by antenna magnetic core portion, and the conductive layer that is provided with at least a portion on above-mentioned antenna magnetic core portion surface forms, and this conductive layer can play the effect of transducer.

Industrial application prospect

The present invention can be used for antenna assembly, the door handle device of belt sensor. For example, the present invention can fit The gate that is used for automobile or building, and defective products checkout gear, article detection device etc.

Claims (13)

1, a kind of antenna assembly, its antenna part is by the antenna magnetic core portion with soft-magnetic body, and the wire portion that is attached to above-mentioned antenna magnetic core portion forms, and it is characterized in that: possess the conductive layer that is provided with at least a portion of above-mentioned antenna magnetic core portion, and this conductive layer plays the effect of sensor electrode.

2, antenna assembly according to claim 1 is characterized in that: the sensor electrode is the static capacity type sensor electrode.

3, antenna assembly according to claim 1 and 2 is characterized in that: the soft-magnetic body that above-mentioned antenna magnetic core portion has conductivity, and above-mentioned soft-magnetic body has at least a part to be above-mentioned conductive layer.

4, antenna assembly according to claim 3 is characterized in that: above-mentioned soft-magnetic body is by plural magnetic chip stack is formed.

5, according to claim 3 or 4 described antenna assemblies, it is characterized in that: the material that constitutes above-mentioned soft-magnetic body is the amorphous soft magnetic material, or the soft magnetism Nanocrystalline materials.

6, antenna assembly according to claim 1 and 2 is characterized in that: above-mentioned antenna magnetic core portion is base material with the ferrite, disposes above-mentioned conductive layer at least a portion on above-mentioned antenna magnetic core portion surface.

7, antenna assembly according to claim 6 is characterized in that: above-mentioned conductive layer is film or the paillon foil that possesses conductivity.

8, as each the described antenna assembly in the claim 1～7, it is characterized in that: above-mentioned conductive layer relatively is provided with opposed parts, its can and above-mentioned conductive layer between form the enterable space that enters of object.

9, antenna assembly according to claim 8 is characterized in that: above-mentioned opposed parts are the body of car body or building.

10, as each the described antenna assembly in the claim 1～9, it is characterized in that: the above-mentioned wire portion that is provided with above-mentioned antenna part carries out the control part that the signal of telecommunication is launched and received, and above-mentioned control part is set at: successively stagger in time with at least a portion of transducer in service time of powering to above-mentioned sensor electrode service time at the antenna that carries out signal of telecommunication emission to above-mentioned wire portion and receive.

11, a kind of door handle device comprises:

Possess by antenna magnetic core portion and be attached to the antenna assembly that antenna part constituted that the wire portion in the above-mentioned antenna magnetic core portion is formed;

And the handle that supports said antenna device,

Wherein, at least a portion of the above-mentioned antenna magnetic core portion of said antenna device, be provided with conductive layer, and this conductive layer is used as sensor electrode.

12, door handle device according to claim 11 is characterized in that: the soft-magnetic body that above-mentioned antenna magnetic core portion has conductivity, and above-mentioned soft-magnetic body has at least a part to be above-mentioned conductive layer.

13, door handle device according to claim 11 is characterized in that: above-mentioned antenna magnetic core portion is base material with the ferrite, the above-mentioned conductive layer of configuration at least a portion on above-mentioned antenna magnetic core portion surface.

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