JP3826897B2 - Antenna device with sensor, door handle device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna device with a sensor and a door handle device.
[0002]
[Prior art]
Patent Document 1 discloses a door handle having a bar antenna portion. According to this, the antenna part is built in the handle body of the door handle. When the user carrying the electronic key approaches the door handle, the user enters a receiving state, and the bar antenna unit can receive the ID code from the electronic key.
[0003]
Patent Document 2 discloses a door handle having a transmission antenna portion. According to this, the transmitting antenna portion is built in the handle body of the door handle. This is transmitted from the transmitting antenna unit.
[0004]
Further, Patent Literature 3 and Patent Literature 4 disclose a door opening / closing device in which a transmission antenna portion and a capacitive sensor electrode are separately mounted on a door handle.
[0005]
[Patent Document 1]
JP 2001-355358 A
[Patent Document 2]
JP 2000-160897 A
[Patent Document 3]
JP 2002-295064 A
[Patent Document 4]
Japanese Patent Laid-Open No. 2003-13628
[0006]
[Problems to be solved by the invention]
According to Patent Document 3 and Patent Document 4, although the transmission antenna portion and the capacitance type sensor electrode are separately mounted on the door handle, and the added value is increased, the transmission antenna portion and the capacitance It is formed of a member separate from the mold type sensor electrode. Therefore, the antenna portion exhibits only the antenna function, and the sensor electrode exhibits only the capacitance type sensor function.
[0007]
The present invention is a further technical advance of the above-described prior art, and it is an object of the present invention to provide an antenna device with a sensor and a door handle device having a core part that can share an antenna function and a capacitive sensor function. To be.
[0008]
[Means for Solving the Problems]
  An antenna device with a sensor according to the present invention includes a core portion provided with a soft magnetic material having conductivity, a conductive wire portion wound around the outer surface of the soft magnetic material constituting the core portion and attached to the core portion. An antenna part consisting of
  At least a part of the conductive soft magnetic material constituting the core part is a capacitive sensor electrode, and the soft magnetic material is formed by laminating a plurality of core sheets.And
A control unit is provided that transmits or receives an electrical signal to or from the conductor portion of the antenna unit. The control unit transmits or receives an electrical signal to or from the conductor portion of the antenna unit, and supplies power to the sensor electrode. Set to deviate from sensor usage timeIs.
[0009]
  BookAccording to the invention, the antenna unit includes the core unit and the conductive wire unit attached to the core unit, and can transmit and / or receive. Furthermore, since at least a part of the soft magnetic material forming the core portion is a capacitive sensor electrode having conductivity, when the object approaches the sensor electrode, the capacitance changes. The presence of the object is detected. That is, the soft magnetic material constituting the core part of the antenna part is shared by the antenna function and the capacitive sensor function.
[0011]
  MaSince the soft magnetic material forming the core portion is formed by laminating a plurality of core sheets, the deformability of the core sheet is ensured even when an external force load is applied, and the core sheet is protected. Will improve.
[0012]
  BookA door handle device according to the present invention includes a core portion provided with a soft magnetic material having conductivity, and a conductive wire portion wound around the outer surface of the soft magnetic material constituting the core portion and attached to the core portion. An antenna part is provided,
  At least a part of the conductive soft magnetic material constituting the core part is a capacitive sensor electrode, and the soft magnetic material is formed by laminating a plurality of core sheets.And
A control unit is provided that transmits or receives an electrical signal to or from the conductor portion of the antenna unit. The control unit transmits or receives an electrical signal to or from the conductor portion of the antenna unit, and supplies power to the sensor electrode. Set to deviate from sensor usage timeAn antenna device with a sensor is provided.
[0013]
  BookAccording to the door handle device according to the invention, the antenna unit includes the core unit and the conductive wire unit attached to the core unit, and can transmit and / or receive. Furthermore, since at least a part of the soft magnetic material forming the core portion is a capacitive sensor electrode having conductivity, when the object approaches the sensor electrode of the door handle device, the capacitance Change occurs and the presence of the object is detected. That is, the soft magnetic material constituting the core part of the antenna part is shared by the antenna function and the capacitive sensor function.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, the antenna unit includes a core unit including a soft magnetic material having conductivity, and a conductive wire unit attached to the core unit. Examples of the soft magnetic material forming the soft magnetic material include a steel plate, a silicon steel plate, an amorphous soft magnetic material, and a soft magnetic nanocrystal material that are excellent in magnetic permeability. Accordingly, the core sheet can be formed of a steel plate, a silicon steel plate, an amorphous soft magnetic material, a soft magnetic nanocrystal material, or the like. In particular, amorphous soft magnetic materials or soft magnetic nanocrystalline materials have high permeability and high frequency characteristics while having conductivity.
[0015]
Examples of the amorphous soft magnetic material include iron-based and cobalt-based materials. The soft magnetic nanocrystalline material includes at least one selected from iron, cobalt, and nickel, and at least one selected from titanium, zirconium, hafnium, vanadium, niobium, molybdenum, chromium, tungsten, tantalum, and manganese, Examples thereof include those mainly composed of ultrafine crystal grains having a particle size of 2000 angstroms or less, 1000 angstroms or less, or 500 angstroms or less.
[0017]
In addition, the core part can illustrate the form covered with the sealing film. In this case, even when the core part is easily corroded, the protection and durability of the core part can be further enhanced.
[0018]
According to the present invention, the soft magnetic material forming the core portion can be exemplified by a configuration in which a plurality of core sheets are laminated with a deformable layer interposed between adjacent core sheets. In this case, since the soft magnetic body forming the core portion is formed with the deformable layer interposed between the adjacent core sheets, the deformation of the core sheet can be achieved even when an external force load is applied. Property is secured, and the protection of the core sheet is improved. Examples of the deformable layer include a soft material layer or an air layer. Examples of the soft material layer include rubber-like members (rubber or soft resin). Examples of the soft material layer include materials having poor conductivity or non-conductivity.
[0019]
According to the present invention, a mode in which an opposing member provided to face the soft magnetic body so as to form an entry space into which an object can enter can be exemplified between the soft magnetic body and the soft magnetic body. Here, the soft magnetic body and the facing member may be directly opposed to each other through the entry space, or the soft magnetic body is in a state where another member is disposed between the soft magnetic body and the facing member. And the opposed member may be opposed to each other.
[0020]
The opposing member can be formed of a conductive material. It is preferable that the opposing member can be grounded. As the counter member, the base body on which the antenna device with the sensor is mounted may be used. When applied to a structure such as a vehicle or a building, a body (including a door body) of a structure such as a vehicle body or a building can be adopted as the base. The body of the vehicle body is generally grounded.
[0021]
  According to the present invention,It has a control unit that transmits or receives an electrical signal to the conductor part of the antenna unit, and the control unit feeds the sensor electrode with an antenna unit usage time for transmitting or receiving an electrical signal to the conductor part of the antenna unit. Set to deviate from the sensor usage time.TheIn this case, it is advantageous for noise reduction. Shifting the antenna unit usage time from the sensor usage time means that the antenna unit usage time and the sensor usage time do not completely coincide with each other. It only needs to be separated.
[0022]
The handle device is operated by a human body or a robot arm. A typical handle device includes a door handle device (including a door handle and a door knob). The handle may be a pulling method, a pushing method, or a rotating method. When applied to a handle device, the opposing member may be formed of a body of a structure such as a vehicle equipped with the handle device, or may be separately provided in addition to the body.
[0023]
【Example】
(First embodiment)
The first embodiment of the present invention will be described below. The sensor-equipped antenna device 1 according to the present embodiment includes a transmitting antenna unit 2. As shown in FIG. 1, the antenna part 2 includes a core part 5 having magnetic permeability and a conductor part 6 attached to the core part 5.
[0024]
Furthermore, the antenna device 1 with the sensor according to the present embodiment is provided with a facing member 3 provided to face the core part 5 so as to form an entry space 4 into which the object 7 can enter between the core part 5. And have. The opposing member 3 is formed in a plate shape with a conductive material (for example, iron-based, cobalt-based, nickel-based, aluminum-based, etc.). The facing member 3 faces the core portion 5 via the entry space 4 and is grounded (grounded) via the ground wire 30. The facing member 3 has a required area and is disposed along the core portion 5. The opposing member 3 can also be formed of a base (a body such as a door body in the case of a vehicle) that holds the antenna device 1 with a sensor.
[0025]
As shown in FIG. 1, the core portion 5 has good magnetic permeability and conductivity. The core part 5 is composed of a soft magnetic body 51 having a laminated structure formed by laminating a plurality of core sheets 50 having conductivity and high magnetic permeability at intervals in the thickness direction thereof. Although the thickness of the core sheet 50 per sheet is thin, the core sheets 50 are laminated to form the laminated structure of the soft magnetic body 51, so that an apparent volume that functions as the magnetic core of the antenna unit 2 can be secured. it can.
[0026]
Further, if the soft magnetic body 51 having a laminated structure in which the core sheets 50 are laminated, when an eddy current is generated in the core sheet 50, the eddy current loop can be reduced in the lamination direction of the core sheets 50, and the eddy current can be reduced. It is advantageous for reducing the loss. Although the thickness of one core sheet 50 is appropriately selected, considering the reduction of eddy current loss in a high frequency region, it can be exemplified by 1000 μm or less, particularly 500 μm or less, 100 μm or less, 50 μm or less, and the lower limit of the thickness As an example, 0.01 μm can be exemplified.
[0027]
In addition, the whole core part 5 or the surface of each core sheet | seat 50 can be coat | covered with the sealing film with high electrical resistance and high sealing performance as needed. Thereby, even when the usage environment is severe, the durability of the entire core portion 5 or each core sheet 50 can be improved. In particular, the core part 5 is protected from foreign matters (water, iron powder, carbon, etc.) from the outside world, and is useful for improving the durability of the capacitance sensor function.
[0028]
An example of the material of the core sheet 50 is a soft magnetic material having a low coercive force. Examples of the soft magnetic material include an amorphous soft magnetic material and a soft magnetic nanocrystal material. These materials have conductivity, and are excellent in magnetic permeability and high frequency characteristics, which is advantageous for high performance and miniaturization.
[0029]
Examples of the amorphous soft magnetic material include iron-based and cobalt-based materials. The soft magnetic nanocrystalline material includes at least one selected from iron, cobalt, and nickel, and at least one selected from titanium, zirconium, hafnium, vanadium, niobium, molybdenum, chromium, tungsten, tantalum, and manganese, Examples thereof include those composed of ultrafine crystal grains having a particle size of 500 angstroms or less.
[0030]
According to the present embodiment, the entire core portion 5 or the surface of each core sheet 50 can be coated with a film having a large electric resistance as necessary. If a film having a large electric resistance is coated on the surface of each core sheet 50, generation of eddy current loops in the thickness direction of the core sheet 50 is restricted, and eddy current loss can be reduced. As the film having a large electric resistance, an organic or inorganic film can be employed, and for example, a phosphoric acid film or a ferrite iron oxide film can be employed.
[0031]
According to the present embodiment, the deformable layer 56 is interposed between the core sheets 50 constituting the soft magnetic body 51 having a laminated structure constituting the core portion 5. When the deformable layer 56 is interposed between the core sheets 50, the deformation tolerance and protection of the core sheet 50 can be improved. Examples of the deformable layer 56 include a soft material layer or an air layer. Examples of the soft material layer include rubber-like members (rubber or soft resin).
[0032]
The conductor portion 6 of the antenna portion 2 is attached to a soft magnetic body 51 having a laminated structure of the core portion 5. Specifically, as shown in FIG. 1, the conductive wire portion 6 includes a coil portion 60 wound around the outer surface of a soft magnetic body 51 having a laminated structure constituting the core portion 5 in a coil shape, and a coil portion 60. And an extending portion 62 which is electrically connected. The coil part 60 winds the core sheet 50A mentioned later from the outer side. A power supply 64 and a control unit 65 are connected to the extending part 62 of the conducting wire part 6. The power source 64 is preferably an AC power source.
[0033]
As shown in FIG. 1, among the plurality of core sheets 50 constituting the soft magnetic body 51 having a laminated structure, the core sheet 50 </ b> A facing the facing member 3 has conductivity in addition to soft magnetism. It can function as a capacitance-type sensor electrode and is electrically connected to a detection unit 52 that detects capacitance. The detection unit 52 has a function of applying a voltage between the core sheet 50A and the facing member 3 when detecting the capacitance, and detecting the capacitance of the core sheet 50A as a capacitance type sensor electrode. Have The detection unit 52 is an electrostatic capacitance type sensor that applies the principle of a capacitor, and can measure a wide range of dielectrics such as a metal body and a human body.
[0034]
Since the core sheet 50A and the facing member 3 have a large area, it is advantageous for securing the capacitance. Note that the core sheet 50A and the facing member 3 may have the same area or different areas as long as a capacitive sensor can be configured.
[0035]
When the object approaches the core sheet 50A that is the sensor electrode in the core part 5, that is, when the object 7 enters the entry space 4 formed between the core sheet 50A of the core part 5 and the facing member 3, The capacitance changes under the influence of the relative dielectric constant of the object 7, and this is detected by the detection unit 52. For this reason, the presence of the change object 7 or the quality of the object 7 is determined based on the change in capacitance. Examples of the object 7 include living bodies such as human bodies and animals, working robots, objects such as parts and cards, and liquid substances such as rainwater.
[0036]
According to the present embodiment, the facing member 3 that is grounded via the ground wire 30 is provided near the core portion 5, and is formed between the core sheet 50 </ b> A of the core portion 5 and the facing member 3. The space volume width of the entry space 4 is defined within a predetermined size. Since the object 7 having a relative dielectric constant different from that of the entry space 4 is arranged in the entry space 4, the volume of the object 7 occupying the entry space 4 is increased, and therefore a change in the dielectric constant is easily secured. Thus, the sensing performance as a capacitive sensor is improved.
[0037]
The control unit 65 has a function of transmitting radio waves from the antenna unit 2.
[0038]
In use, since an alternating current is fed from the power source 64 to the conductive wire portion 6 of the antenna portion 2, an electromagnetic wave is constituted by the generated electric field and magnetic field and is transmitted from the antenna portion 2 as a radio wave. When an object 7 equipped with an electronic key or the like approaches in a state where a radio wave is transmitted from the antenna unit 2, the electronic key or the like receives the radio wave. Further, since the receiving device (not shown) receives radio waves transmitted from the electronic key or the like, the approach of the object 7 is detected. Based on the radio wave transmitted from the electronic key or the like, it is possible to perform ID authentication (object authentication such as user authentication and parts authentication) as to whether or not the object 7 is registered in advance.
[0039]
Furthermore, when the object 7 approaches the core sheet 50 </ b> A of the core portion 5, that is, when the object 7 enters the entry space 4, the capacitance changes, so the presence of the object 7 or the object 7 described above is present. Pass / fail is determined. Therefore, by effectively using the soft magnetic material 51 having the conductivity and soft magnetism of the core portion 5 of the antenna portion 2, a capacitive sensor for human body detection or object detection can be configured.
[0040]
For example, the case where the antenna apparatus 1 with a sensor which concerns on a present Example is equipped in the door handle apparatus is added. In this case, since power is supplied from the power source 64 to the conductive wire portion 6 of the antenna portion 2, radio waves are transmitted from the antenna portion 2. In this way, when a radio wave is transmitted from the antenna unit 2 and a user equipped with an electronic key or the like approaches, the electronic key or the like receives the radio wave transmitted from the antenna unit 2. Further, since the receiving device receives radio waves transmitted from an electronic key or the like, the approach of the user to the door handle device is detected, and the user's ID authentication is performed. ID authentication (user authentication) refers to determining whether or not the user is registered in advance.
[0041]
When the person is registered by ID authentication, the door can be opened and closed as follows. That is, when the user's fingertip approaches the core portion 5 to operate the door handle, that is, when the user's fingertip enters the entry space 4, the capacitance in the entry space 4 changes. An intention to open and close the door is detected. For this reason, the door device is unlocked by operating a door lock device (not shown). If it is not authenticated that the person is registered by ID authentication, the door device remains locked even if the user's fingertip approaches the core unit 5 to operate the door handle. .
[0042]
As described above, when the conditions of ID authentication based on radio waves by the antenna unit 2 and detection of the user's intention to open the door based on the change in capacitance are satisfied, the door handle device is unlocked.
[0043]
According to the present embodiment, the core sheet 50 </ b> A facing the facing member 3 among the plurality of core sheets 50 constituting the soft magnetic body 51 having the laminated structure of the core portion 5 is the detection unit 52 that detects the capacitance. However, the present invention is not limited to this, and another core sheet 50 other than the core sheet 50A constituting the soft magnetic body 51 having a laminated structure may be electrically connected to the detection unit 52. In this case, the other core sheet 50 electrically connected to the detection unit 52 serves as a sensor electrode.
[0044]
Further, according to the present embodiment, the opposing member 3 that is grounded via the ground wire 30 is provided. However, the present invention is not limited thereto, and the ground itself may be used instead of the opposing member 3.
[0045]
(Second embodiment)
FIG. 2 shows a second embodiment. The second embodiment has basically the same configuration as the first embodiment. Parts having common functions are denoted by common reference numerals. In the following, different parts will be mainly described. The sensor-equipped antenna device 1 according to the present embodiment includes an antenna unit 2 for reception. As shown in FIG. 2, the antenna unit 2 includes a core unit 5 and a conductive wire unit 6 attached to the core unit 5. The conductor portion 6 of the antenna portion 2 is attached to a soft magnetic body 51 having a laminated structure of the core portion 5. Specifically, as shown in FIG. 2, the conducting wire portion 6 includes a coil portion 60 wound around the core portion 5 and an extending portion 62 that is electrically connected to the coil portion 60. A detection unit 68 and a control unit 65 are connected to the extending portion 62 of the conducting wire portion 6.
[0046]
In use, the antenna unit 2 receives radio waves from the outside. Accordingly, when the object 7 (for example, a human body or an object) equipped with an electronic key or the like for transmitting radio waves approaches, the antenna unit 2 receives the radio waves, and thus the approach of the object 7 is detected. Further, when the object 7 approaches the core sheet 50A of the core portion 5, that is, when the object 7 enters the entry space 4, the electrostatic capacity in the entry space 4 changes. The quality of the object 7 is determined.
[0047]
(Third embodiment)
FIG. 3 shows a third embodiment. The third embodiment has basically the same configuration as the first embodiment. Parts having common functions are denoted by common reference numerals. In the following, different parts will be mainly described. The sensor-equipped antenna device 1 according to this embodiment includes an antenna unit 2 for both transmission and reception. As shown in FIG. 3, it has the core part 5 and the conducting wire part 6 attached to the core part 5. As shown in FIG. The conductor portion 6 of the antenna portion 2 is attached to the core portion 5. Specifically, as shown in FIG. 3, the conducting wire portion 6 includes a coil portion 60 wound around the core portion 5 and an extending portion 62 that is electrically connected to the coil portion 60. A control unit 65 is connected to the extending unit 62, and a detection unit 68 and a power source 64 can be switched and connected by a switch 67. When the switch 67 is brought into conduction with the first contacts 68a and 68b, the conductor portion 6 is electrically connected to the power source 64, so that the antenna portion 2 transmits radio waves. When the switch 67 is electrically connected to the second contacts 69a and 69b, the conductor 6 is electrically connected to the detector 68, so that the antenna 2 can receive radio waves.
[0048]
(Control unit 65)
According to each of the embodiments described above, as shown in FIG. 4, the control unit 65 electrostatically transmits the antenna unit usage time TA for transmitting or receiving an electrical signal to the conductor 6 of the antenna unit 2 and the opposing member 3. The sensor usage time TC used as a sensor is set to be shifted. That is, as shown in FIG. 4, the antenna unit usage time TA for transmitting or receiving an electrical signal to the conductor portion 6 of the antenna unit 2 and the sensor usage time TC for feeding power to the opposing member 3 are temporally It is done at different times so as not to overlap. Therefore, when the antenna unit 2 is exhibiting the antenna function, the capacitive sensor is turned off. Conversely, when the antenna unit 2 functions as a capacitive sensor, the antenna function is turned off. This is advantageous for suppressing the generation of noise.
[0049]
It should be noted that the antenna unit usage time TA for transmitting or receiving an electrical signal to the conductor 6 of the antenna unit 2 and the sensor usage time TC for using the opposing member 3 as an electrostatic sensor may be completely separated. In some cases, as long as there is a region that does not overlap in time, it may be partially overlapped in time.
[0050]
(Application example)
5 and 6 show a first application example of each of the above-described embodiments. This application example is a case where the present invention is applied to a door handle device 100 that opens and closes a door equipped on a vehicle body. As shown in FIGS. 5 and 6, the door handle device 100 includes a base 101, a handle 102 provided on the base 101 so as to be rotatable in the directions of arrows B <b> 1 and B <b> 2, and a handle 102 operated by a user's fingertip. And a biasing element 103 that biases the lens in the closing direction (arrow B2 direction). The biasing element 103 is formed of a torsion coil spring, but is not limited to this. The handle 102 forms an entry space 4 into which a fingertip enters.
[0051]
The antenna portion 2 described above is provided in the portion 102a of the handle 102. In use, the antenna unit 2 transmits or receives radio waves for performing user ID authentication. The other member 102b of the handle 102 that faces the portion 102a via the entry space 4 is equipped with the above-described facing member 3.
[0052]
An entry space 4 into which a fingertip can enter is formed between the antenna unit 2 and the facing member 3. Therefore, when the user's fingertip that is the object enters the entry space 4, the capacitance in the entry space 4 changes. For this reason, when the presence of the fingertip in the entry space 4 is determined by a change in capacitance in the ID-authenticated state, the user's intention to open the door is detected. For this reason, the door device is unlocked by operating a door lock device (not shown).
[0053]
As described above, when the conditions of ID authentication based on radio waves transmitted and / or received by the antenna unit 2 and detection of the user's intention to open the door based on the change in capacitance are satisfied, the door handle device is unlocked. Is done.
[0054]
In addition, when the door body itself has conductivity, the provision of the opposing member 3 on the portion 102b of the handle 102 may be abolished, and the opposing body may be formed by the door body itself.
[0055]
7 to 9 show a second application example of each of the above-described embodiments. This application example is a case where the present invention is applied to a door handle device 100 that opens and closes a door mounted on a vehicle body. The door handle device 100 includes a handle 101 operated with a fingertip, and an attachment arm 102 for attaching the handle 101 to a vehicle door body. The handle 101 forms an entry space 4 into which a fingertip is entered between the door body and the handle 101.
[0056]
As shown in FIGS. 7 to 9, the antenna unit 2 is disposed inside the handle 101. The antenna unit 2 includes a core unit 5 and a conductive wire unit 6 wound around the core unit 5. In use, the antenna unit 2 transmits or receives a radio wave for performing user ID authentication as described above. Accordingly, when the user's fingertip that is the target object enters the entry space 4 in the state where the user's ID authentication is performed, the capacitance in the entry space 4 changes, so the presence of the fingertip is determined. The user's intention to open the door is detected. For this reason, the door device is unlocked by operating a door lock device (not shown).
[0057]
As shown in FIGS. 8 and 9, the core portion 5 is configured by laminating a plurality of core sheets 50 at intervals in the thickness direction thereof. The entire core portion 5 is integrally embedded in the mold portion 8 together with the coil portion 60. Thereby, the moisture resistance, impact resistance, and flexibility of the core sheet 50 can be improved. The space between the core sheets 50 is an air layer 80 as a deformable layer. Therefore, the deformation tolerance of the core sheet 50 is ensured, and the protection is ensured even when an external force load is applied. The thickness width of the air layer 80 can be reduced, and the core sheets 50 may actually be in contact with each other.
[0058]
Further, according to the embodiment shown in FIG. 10, the entire core portion 5 is integrally embedded in the mold portion 8 together with the coil portion 60, and the soft material layer 83 as a deformable layer exists between the core sheets 50. ing. The soft material layer 83 is integral with the mold part 8 and joins the core sheet 50. Therefore, the deformation tolerance of the core sheet 50 is ensured, and the protection of the core portion 5 is ensured even when an external force load is applied. The soft material layer 83 can be formed of rubber or soft resin, and examples thereof include urethane, epoxy, and silicon.
[0059]
9 and 10 are conceptual diagrams, and the number of core sheets 50 is actually large.
[0060]
11 to 13 show a third application example of each of the above-described embodiments. This application example is applied to a door handle device 100 that opens and closes a door 200 of a building. In the example illustrated in FIG. 12, the door handle device 100 includes a handle 101 that is operated by a user's fingertip, and a facing member 3 that is provided in the vicinity of the handle 101. Between the handle 101 and the opposing member 3, an entry space 4 into which a user's fingertip is entered is formed. The handle 101 incorporates the antenna unit 2. The conductive opposing member 3 is grounded via a ground wire (not shown).
[0061]
In the example illustrated in FIG. 13, the door handle device 100 includes a rotary handle 101 that is operated by a user's fingertip, and an opposing member 3 provided in the vicinity of the handle 101. Between the handle 101 and the opposing member 3, an entry space 4 into which a user's fingertip is entered is formed. The handle 101 incorporates the antenna unit 2.
[0062]
Therefore, when the user's fingertip, which is the object, enters the entry space 4, the capacitance in the entry space 4 changes, so the presence of the fingertip is determined, and the user's intention to open the door is detected. . For this reason, also in this application example, when conditions for ID authentication based on transmission or reception of the antenna unit 2 and detection of a user's intention to open the door based on a change in capacitance are satisfied, a door lock device (not shown) Is activated and unlocked. Reference numeral 202 denotes a keyhole into which a normal key is inserted. When the door 200 has conductivity, the plate-like facing member 3 can be eliminated and the door 200 itself can be used as the facing member.
[0063]
FIG. 14 shows a fourth application example of each embodiment described above. This application example is applied to a defective product detection apparatus that determines the quality of parts in a manufacturing factory. As shown in FIG. 14, the sensor-equipped antenna device 1 includes an antenna portion 2 that faces each other and an opposing member 3 that is grounded via a ground wire (not shown). The antenna unit 2 and the facing member 3 form an entry space 4 through which an inspection object 70 that is an object can pass. When the inspection object 70 is a non-defective product, the capacitance when the inspection object 70 enters the entry space 4 is measured in advance. Further, when the inspection object 70 is a defective product, the capacitance when the inspection object 70 enters the entry space 4 is predicted in advance. Therefore, when the inspection object 70 enters the entry space 4, the capacitance of the inspection object 70 is detected by the antenna unit 2 and the facing member 3. The quality of the inspection object 70 is determined according to the capacitance of the inspection object 70 in the approach space 4. When the inspection object 70 is defective, the exit of the entry space 4 is blocked by the blocking portion 79 to block the passage of the inspection object 70 to the subsequent process. Further, radio waves are transmitted from the antenna unit 2 to notify the receiving side that the inspection object 70 is defective.
[0064]
FIG. 15 shows a fifth application example of each of the above-described embodiments. This application example is applied to an object contact detection apparatus. As shown in FIG. 15, the sensor-equipped antenna device 1 includes an antenna unit 2 facing each other and a counter member 3 that is grounded. The antenna unit 2 and the facing member 3 form an entry space 4 through which an object 72 as a target can pass. When the object 72 enters the entry space 4, the capacitance of the entry space 4 changes, so that the entry of the object 72 is detected. When the object 72 is detected, a radio wave is transmitted from the antenna unit 2 to notify the reception side of the entry of the object 72 into the entry space 4.
[0065]
In addition, the number of objects that have entered the entry space 4 is counted based on the electrostatic capacity, and when the number of objects reaches a predetermined number, a radio wave is transmitted from the antenna unit 2 to notify that the predetermined number has been reached. You may apply to the counter apparatus of a system.
[0066]
In addition, the present invention is not limited only to the above-described embodiments. For example, the opposing member 3 is grounded via a ground wire, but it may be a non-grounded method. It can be implemented with appropriate modifications. The following technical idea can also be grasped from the above description.
[Additional Item 1] An antenna unit including a core unit including a soft magnetic material having conductivity and a conductor unit attached to the core unit is provided.
An object detection device comprising: an antenna device with a sensor, wherein at least a part of a soft magnetic material is a capacitive sensor electrode. The object can be detected. In addition, detection of an object can be started by a radio wave received by the antenna unit, or information on the object can be notified by a radio wave transmitted from the antenna unit.
[0067]
【The invention's effect】
As described above, according to the present invention, the soft magnetic material having conductivity and soft magnetism of the core portion of the antenna portion has both an antenna function and a capacitance type sensor function. Therefore, it is possible to provide an antenna device with a sensor and a door handle device that can function as both an antenna and a capacitive electrode sensor.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a concept of an antenna device with a sensor according to a first embodiment.
FIG. 2 is a perspective view showing a concept of a sensor-equipped antenna device according to a second embodiment.
FIG. 3 is a perspective view showing a concept of an antenna device with a sensor according to a third embodiment.
FIG. 4 is a graph showing a relationship between usage time of an antenna and a sensor.
FIG. 5 is a front view of a door handle device according to a first application example.
6 is a cross-sectional view of the door handle device according to the first application example, and is a cross-sectional view taken along line W7-W7 shown in FIG.
FIG. 7 is a plan view of a door handle device according to a second application example.
FIG. 8 is a cross-sectional view of a main part of a door handle device according to a second application example.
FIG. 9 is a sectional view of a main part of the door handle device in a different direction according to the second application example.
FIG. 10 is a cross-sectional view of the main part of the door handle device in different directions according to a different form of the second application example.
FIG. 11 is a configuration diagram of a door handle device according to a third application example.
FIG. 12 is a configuration diagram of a door handle device according to a third application example.
FIG. 13 is a configuration diagram of a door handle device according to a different form according to a third application example.
FIG. 14 is a configuration diagram according to a fourth application example and applied to a defective product detection apparatus in a factory.
FIG. 15 is a configuration diagram applied to an object contact detection device in a factory according to a fifth application example.
[Explanation of symbols]
In the figure, 1 is an antenna device with a sensor, 2 is an antenna portion, 3 is a facing member, 4 is an entry space, 5 is a core portion, 50A is a core sheet, 51 is a soft magnetic material, 6 is a conductor portion, and 60 is a coil portion. , 62 is an extension part, 68 is a detection part, 7 is an object, and 8 is a mold part.

Claims (5)

There is provided an antenna part comprising a core part provided with a soft magnetic body having conductivity and a conductive wire part wound around the outer surface of the soft magnetic body constituting the core part and attached to the core part,
At least a part of the soft magnetic body having conductivity that constitutes the core portion is a capacitive sensor electrode, and the soft magnetic body is formed by laminating a plurality of core sheets. And
A control unit that transmits or receives an electrical signal to the conductor part of the antenna unit, and the control unit transmits and receives an electrical signal to the conductor part of the antenna unit; A sensor-equipped antenna device , wherein the sensor use time for supplying power to the sensor electrode is shifted . 2. The antenna device with a sensor according to claim 1, wherein the soft magnetic material forming the soft magnetic body is at least one of an amorphous soft magnetic material and a soft magnetic nanocrystal material. 3. The apparatus according to claim 1, further comprising a facing member provided to face the soft magnetic body so as to form an entry space into which an object can enter, between the soft magnetic body. An antenna device with a sensor. 4. The sensor-equipped antenna device according to claim 3, wherein the facing member is groundable. There is provided an antenna part comprising a core part provided with a soft magnetic body having conductivity and a conductive wire part wound around the outer surface of the soft magnetic body constituting the core part and attached to the core part,
At least a part of the soft magnetic body having conductivity that constitutes the core portion is a capacitive sensor electrode, and the soft magnetic body is formed by laminating a plurality of core sheets. And a control unit that transmits or receives an electrical signal to the conductor portion of the antenna unit,
The control unit is a sensor-equipped antenna device that is set so as to shift an antenna unit usage time for transmitting or receiving an electrical signal to the conductor portion of the antenna unit and a sensor usage time for supplying power to the sensor electrode. A door handle device characterized by comprising.

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