JP2006222793A - Antenna system and radio terminal device with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts of an antenna system and to simplify the assembling process. <P>SOLUTION: A hole for insertion formed in a direction orthogonal to a thickness direction of a substrate of an antenna system 1 provided with a communication circuit, from one side end of the substrate so as to exist within the substrate, and a contact part for electric connection to the communication circuit is provided in the hole for insertion. An antenna element made of a flexible member is inserted to the hole for insertion of the substrate to not only electrically connect the antenna element and the communication circuit provided on the substrate through the contact part but also fix the antenna element to the substrate by clipping to connect the antenna element to the substrate physically, whereby a special connection component for connecting the single-layer substrate and the antenna element is unnecessary to considerably simplify the configuration and assembling process for connecting both of them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is an antenna device suitable for application to a wireless terminal device such as a mobile phone, a PHS phone (PHS: Personal Handyphone System), a PDA device (PDA: Personal Digital Assistant) having a communication function, and the antenna device. In particular, the present invention relates to an antenna device capable of stably connecting an antenna and a substrate without using connection parts that are required when connecting the antenna and the substrate, and the antenna device. The present invention relates to a wireless terminal device.

  Conventionally, as means for connecting an antenna and a substrate, when an external force of a predetermined value or more is applied to the antenna device in a state where the antenna device is deployed in Japanese Patent Application Laid-Open No. 2004-228790 (Patent Document 1). In addition, there is disclosed an antenna device provided with an antenna detachment means for detaching the antenna device from the casing to prevent damage.

  Specifically, in the case of this antenna device, a bearing portion that inserts and holds a rotating shaft protruding from the housing and rotatably supports the antenna device with respect to the housing, and one of the bearing portions. The antenna detachment means is constituted by an opening formed by notching the portion outward. When an excessive external force is applied to the antenna device, the opening of the antenna detaching means is widened by the external force, so that the gripping of the rotating shaft is released and the antenna device is detached. .

JP 2004-228790 A (Page 5: FIG. 5)

  Here, the board and the antenna on which the circuit or the like is mounted are electrically connected to each other by using special connection parts such as a spring member and a connector terminal provided on the board side and a spring member provided on the antenna side. Need to connect.

  In the case of the antenna device disclosed in Patent Document 1, more and more complicated connection parts and structures are required, and the connection for electrically connecting the rotating shaft protruding from the housing and the substrate is performed. A connecting part and configuration for electrically connecting the rotating part and the antenna detachment means of the antenna device are required.

  As described above, the antenna device disclosed in Patent Document 1 has a large number of parts for connecting the antenna on which a circuit board or the like is mounted, and the configuration is complicated, and a large installation space is required. There was a problem to do.

  In addition, in the case of the antenna device disclosed in Patent Document 1, since the rotation shaft protruding from the housing is rotatably held by the bearing portion, the amount of movement and the frequency of movement of the antenna itself are small. There has been a problem that it becomes difficult to obtain stable antenna characteristics.

  The present invention has been made in view of the above-described problems, and can connect a substrate on which a circuit or the like is mounted to an antenna without requiring special connection parts or installation space. Furthermore, it is an object of the present invention to provide an antenna device that can obtain stable antenna characteristics by connecting a substrate and an antenna in a fixed manner, and a wireless terminal device including the antenna device.

The antenna device according to the present invention is a means for solving the above-described problems.
An antenna element;
A substrate provided with a predetermined electronic circuit;
An insertion hole for the antenna element formed in a direction orthogonal to the thickness direction of the substrate from one side end of the substrate so as to exist inside the substrate;
And a contact portion provided in the insertion hole for electrical connection between the antenna element and a telegraph circuit provided in the substrate.

  Then, by inserting the antenna element into the insertion hole of the substrate, the antenna element and a telegraph circuit provided on the substrate are electrically connected through the contact portion.

Moreover, the wireless terminal device according to the present invention is a wireless terminal device having a wireless communication circuit that performs wireless communication with a wireless base station, and as means for solving the above-described problems,
An antenna element that transmits and receives signals to and from the wireless base station;
A substrate provided with the wireless communication circuit;
An insertion hole for the antenna element formed in a direction orthogonal to the thickness direction of the substrate from one side end of the substrate so as to exist inside the substrate;
An antenna device provided with a contact portion provided in the insertion hole for electrical connection between the antenna element and a wireless communication circuit provided in the substrate;

  Then, by inserting the antenna element into the insertion hole of the substrate, the antenna element and the wireless communication circuit provided on the substrate are electrically connected via the contact portion.

  In the present invention, an antenna element insertion hole is provided inside the substrate, and the antenna element is inserted into the insertion hole to electrically and physically connect both, so that the substrate and the antenna element are connected. For this reason, it is possible to eliminate the need for a special connecting component, and to greatly simplify the configuration and process for connecting the two.

  In addition, it is possible to eliminate the need for special connection parts for connecting the substrate and the antenna element, so that the conventional mounting space for both connecting members can be effectively used as a space for mounting other members. It is possible to make it possible to reduce the size of the device or the wireless terminal device provided with the antenna device by an amount corresponding to the mounting space of the connection members of both.

  In addition, since the antenna element can be physically fixed and connected to the substrate, it is possible to prevent frequency fluctuations caused by the movement of the electrical contact between the substrate and the antenna element, and to stabilize the antenna element. Antenna characteristics can be obtained.

  The present invention can be applied to a mobile phone.

[First Embodiment]
[Overall configuration of mobile phone]
FIG. 1 shows a block diagram of a mobile phone according to the first embodiment of the present invention. As shown in FIG. 1, the mobile phone according to the first embodiment includes an antenna device 1 and a communication circuit 2 that transmit and receive data to and from a base station connected to a mobile operator's communication network. Speaker unit 3 for obtaining sound output such as ringtone, received sound, moving image file sound, music data sound, microphone unit 4 for collecting transmitted sound, etc., outgoing / incoming telephone number, transmission source, transmission It has a display unit 5 for displaying the name of the user, phone / mobile mail outgoing / incoming history, telephone book, address book, schedule book, sent / received mobile mail text, and the like.

  In addition, the mobile phone includes an operation unit 6 provided with a plurality of keys for inputting a desired telephone number and characters, a camera unit 7 for capturing a still image and a moving image of a desired subject, In addition to the communication processing program (communication program), the ROM 8 storing various application programs for information processing such as the mobile mail and the schedule book, the outgoing and incoming histories of the telephone and mobile mail, and the incoming and outgoing mobile mail It has a RAM 9 in which a body, a phone book, an address book, a schedule book, and the like are stored, and a control unit 10 that controls the operation of the mobile phone based on the communication processing program and various application programs.

[Configuration of antenna device]
As shown in FIG. 2, the antenna device 1 includes a single-layer substrate 21 provided with a communication circuit 2, an antenna element 22 having a predetermined resonance frequency characteristic, and a mold member 23 to which the antenna element 22 is fixed. is doing.

  The single-layer substrate 21 is provided with an insertion hole 25 for electrically and physically connecting the antenna element 22. Specifically, the insertion hole 25 is formed in a direction perpendicular to the thickness direction of the single-layer substrate 21 from the one side end portion 21a of the single-layer substrate 21. Is provided to exist.

  The size of the insertion hole 25 is such that the horizontal width is substantially the same as the horizontal width of the antenna element 22 or slightly longer than the horizontal width of the antenna element 22, and the vertical width is equal to the thickness of the antenna element 22. The lengths are substantially the same or slightly longer than the thickness of the antenna element 22. That is, the size of the insertion hole 25 is approximately the same as the antenna element 22 or slightly larger than the antenna element 22 so that the antenna element 22 can be inserted.

  In this insertion hole 25, a contact portion formed of an electrically conductive member such as a copper plate member for electrical connection between the antenna element 22 and the communication circuit 2 provided on the single-layer substrate 21. 26 is provided. In the case of this example, the contact portion 26 is a contact portion that is electrically connected to a feeding point of the antenna element 22 (indicated by reference numeral 27 in FIG. 4).

  In addition, it is good also as supplying electric power with another line with respect to the antenna element 22, and the said contact part 26 is good also as a contact part connected to the terminal for grounds of the antenna element 22, or providing the said two contact parts 26, and one side is provided. The contact portion connected to the ground terminal of the antenna element 22 may be used, and the other contact portion connected to the feeding point of the antenna element 22 may be used.

  Further, the contact portion 26 is notched into a taper shape so that the distal end portion 26a on the insertion port 25a side of the contact portion 26 approaches from the bottom surface portion 26b side to the upper surface portion 26c side.

  Next, the antenna element 22 is formed of a flexible member as shown in FIGS. 3 (a) and 3 (b), or a sheet metal member as shown in FIGS. 3 (c) and 3 (d). As shown in FIG. 2, the tip end portion 22a is formed into a taper shape so as to rise from the bottom surface portion 22b side to the top surface portion 22c side of the antenna element 22.

  That is, the tip end portion 26a of the contact portion 26 and the tip end portion 22a of the antenna element 22 have a small resistance when the tip end portion 22a of the antenna element 22 contacts the tip end portion 26a of the contact portion 26. The aforementioned notch processing is performed so that 22 can be inserted into the insertion hole 25.

[Assembling process of antenna device]
In such an antenna device 1, the single-layer substrate 21 and the antenna element 22 are connected as shown in FIG. 4 simply by inserting the tip 22 a of the antenna element 22 into the insertion hole 25 of the single-layer substrate 21. The assembly is complete.

  Specifically, when the insertion of the distal end portion 22 a of the antenna element 22 into the insertion hole 25 of the single-layer substrate 21 is started, first, the distal end portion 22 a of the antenna element 22 and the contact portion provided in the insertion hole 25. 26 is in contact with the tip 26a. As shown in FIG. 2, the contact portion 26 is provided so as to protrude from the bottom surface portion 25b of the insertion hole 25. However, the tip portion 22a of the antenna element 22 and the tip portion 26a of the contact portion 26 are provided. As described above, each is cut into a tapered shape.

  For this reason, when a force in the depth direction of the insertion hole 25 is applied to the antenna element 22 in a state where the distal end portion 22a of the antenna element 22 is in contact with the distal end portion 26a of the contact point portion 26, the antenna element has almost no resistance. The element 22 rides on the contact portion 26, and the antenna element 22 is guided to the back of the insertion hole 25 while riding on the contact portion 26, and the connection between the single-layer substrate 21 and the antenna element 22 is completed.

  FIG. 5 shows an enlarged cross-sectional view of a connection portion of the antenna element 22 connected to the single-layer substrate 21. As shown in FIG. 5, the contact portion 26 is electrically connected to the electronic circuit 2 provided on the surface portion of the single-layer substrate 21, and the antenna element 22 is inserted into the insertion hole 25. In addition, the contact portion 26 contacts a feeding point 27 of the antenna element 22, and the antenna element 22 and the electronic circuit 2 are electrically connected via the contact portion 26.

  As described above, the size of the portion of the antenna element 22 inserted into the insertion hole 25 is substantially the same as the insertion hole 25 (the same width and the same thickness, or slightly larger). For this reason, the antenna element 22 inserted into the insertion hole 25 is physically connected to the single-layer substrate 21 so as to be sandwiched entirely by the insertion hole 25.

  Moreover, the antenna element 22 is inserted into the insertion hole 25 in a state where it rides on the contact part 26 provided so as to protrude from the bottom surface part 25 b of the insertion hole 25. As a result, as shown in FIG. 5, the antenna element 22 inserted into the insertion hole 25 is pushed up to the upper surface portion 25c side of the insertion hole 25 by the thickness of the contact portion 26, and the antenna element 22 becomes a single-layer substrate. 21 is more physically physically connected to 21.

[Effect of the first embodiment]
As apparent from the above description, the cellular phone according to the first embodiment is provided with the insertion hole 25 for the antenna element 22 in the single-layer substrate 21, and the antenna element 22 is inserted into the insertion hole 25. Thus, since the single-layer substrate 21 and the antenna element 22 are electrically and physically connected, the single-layer substrate 21 and the antenna element 22 are connected without requiring a special connection component for connection. In addition, the configuration and process for connecting the two can be greatly simplified.

  In addition, since a special connection component for connecting the single-layer substrate 21 and the antenna element 22 can be eliminated, the mounting space for both connection members, which has conventionally been required, is mounted with other members. The mobile phone can be effectively used as a space, or the mobile phone can be reduced in size by the mounting space for the connection members.

In addition, since the connection portion between the single-layer substrate 21 and the antenna element 22 is physically fixed, it is possible to prevent frequency fluctuations that occur due to movement of electrical contacts between the single-layer substrate 21 and the antenna element 22. And stable antenna characteristics can be obtained.

[Second Embodiment]
Next, a mobile phone according to a second embodiment to which the present invention is applied will be described. In the mobile phone of the first embodiment described above, the substrate to which the antenna element 22 is connected is the “single-layer substrate 21”. However, the mobile phone of the second embodiment has the antenna element 22 Are connected to a “multilayer substrate”.

  The first embodiment described above and the second embodiment differ only in whether the substrate to which the antenna element 22 is connected is “single layer” or “multilayer”. For this reason, in the following description of the second embodiment, only the difference portion will be described, and redundant description will be omitted.

[Configuration of Antenna Device for Mobile Phone of Second Embodiment]
FIGS. 6A and 6B show the configuration of the multilayer substrate 30 of the antenna device provided in the mobile phone according to the second embodiment. The multilayer substrate 30 is formed by laminating plate-like first to third substrate pieces 31 to 33 shown in FIG. 6A and bonding them together with corner portions as shown in FIG. 6B. Is formed.

  All or some of the substrate pieces 31 to 33 are provided with electronic circuits according to the design. In this example, the electronic circuit 2 is provided on the third substrate piece 33 as an example. It has been. Further, the third board piece 33 is provided with a contact point 41 for feeding point and a contact point 42 for ground which are electrically connected to the electronic circuit 2. Each of the contact portions 41 and 42 has a front end cut out into a tapered shape like the contact portion 26 described above.

  On the other hand, the second substrate piece 32 is partially cut into a substantially “U” shape on one end side. The position of this notch processing is the contact provided on the third substrate piece 33 over the second substrate piece 32 when the second substrate piece 32 and the third substrate piece 33 are bonded together. It is the position where the parts 41 and 42 can be exposed.

  When the first to third substrate pieces 31 to 33 are stacked and bonded together at the time of assembly, the upper and lower portions of the notched portion of the second substrate piece 32 are respectively the first substrate. The part 31 and the third substrate piece 33 are covered with each other, and the cut-out portion becomes an antenna element insertion hole 45 as shown in FIG. 6B.

  That is, in the case of the multilayer substrate 30, the insertion hole 45 is provided in the second substrate piece 32 serving as an intermediate layer among the first to third substrate pieces 31 to 33. In this example, since the multilayer substrate 30 has a three-layer structure, the insertion hole 45 is provided in the second substrate piece 32 serving as an intermediate layer. For example, the multilayer substrate 30 has a structure of four or more layers. In some cases, the insertion hole 45 may be provided in any of the substrate pieces serving as intermediate layers. Further, when the multilayer substrate 30 has a two-layer structure, the insertion hole 45 may be provided by scraping the bonded portion of each substrate piece.

[Assembling process of antenna device]
Similar to the antenna device 1 described in the first embodiment, such an antenna device can be obtained by simply inserting the tip end portion of the antenna element into the insertion hole 45 of the multilayer substrate 30 as shown in FIG. ) And (b), the multilayer substrate 30 and the antenna element 50 are connected to complete the assembly.

  Specifically, when the tip of the antenna element 50 is inserted into the insertion hole 45 of the multilayer substrate 30, first, the tip of the antenna element 50 and the contact portions 41, 42 provided in the insertion hole 45 are firstly connected. Each tip abuts. The contact portions 41 and 42 are provided so as to protrude from the bottom surface portion of the insertion hole 45, but the tip of the antenna element 50 and the tip of the contact portions 41 and 42 are respectively tapered. Shaped notch processing is applied.

  For this reason, when a force in the depth direction of the insertion hole 45 is applied to the antenna element 50 in a state where the distal end portion of the antenna element 50 is in contact with the distal end portions of the contact portions 41 and 42, there is almost no resistance. The antenna element 50 rides on the contact portions 41, 42, and the antenna element 50 is guided to the depth of the insertion hole 45 while riding on the contact portions 41, 42, so that the multilayer substrate 30 and the antenna element 50 are connected to each other. Connection is complete.

  FIG. 8 is an enlarged cross-sectional view of a connection portion of the antenna element 50 connected to the multilayer substrate 30. As shown in FIG. 8, the antenna element 50 inserted into the insertion hole 45 is electrically connected to the contact portions 41 and 42.

  The size of the portion of the antenna element 50 that is inserted into the insertion hole 45 is substantially the same as the insertion hole 45 (the same lateral width and the same thickness, or slightly larger). For this reason, the antenna element 50 inserted into the insertion hole 45 is physically connected to the single-layer substrate 30 so as to be sandwiched entirely by the insertion hole 45.

  In addition, the antenna element 50 is inserted into the insertion hole 45 in a state of riding on the contact portions 41 and 42 provided so as to protrude from the bottom surface portion 25 b of the insertion hole 45. As a result, the antenna element 50 inserted into the insertion hole 45 is pushed up to the upper surface side of the insertion hole 45 by the thickness of each contact portion 41, 42, and the antenna element 50 is physically moved relative to the multilayer substrate 30. More firmly connected.

[Effects of Second Embodiment]
As is apparent from the above description, in the cellular phone according to the second embodiment, the insertion hole 45 for the antenna element 50 is provided in the intermediate layer of the multilayer substrate 30, and the antenna element 50 is inserted into the insertion hole 45. In addition, since the multilayer substrate 30 and the antenna element 50 are configured to be electrically and physically connected, the multilayer substrate 30 and the antenna element 50 are connected without requiring a special connection component for connection. In addition to being able to greatly simplify the configuration and process for connecting the two, it is possible to obtain the same effects as the cellular phone of the first embodiment described above.

[Modification]
In the description of the above-described embodiment, the present invention is applied to a mobile phone, but this may be a PHS phone (PHS: Personal Handyphone System), a PDA device (PDA: Personal Digital Assistant) having a communication function, or You may apply to other radio | wireless terminal apparatuses, such as a notebook-type personal computer apparatus which has a communication function.

  Finally, the above-described embodiment is merely disclosed as an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and according to the design or the like, as long as the technical idea according to the present invention is not deviated from other embodiments. Of course, various modifications are possible.

1 is a block diagram of a mobile phone according to a first embodiment to which the present invention is applied. It is a figure which shows the structure of the antenna apparatus of the single layer board | substrate provided in the mobile telephone of 1st Embodiment. It is a figure for demonstrating the antenna element provided in the antenna apparatus of the mobile telephone of 1st Embodiment. It is sectional drawing to which the connection part of the antenna element of the antenna apparatus of the mobile telephone of 1st Embodiment and a single layer board | substrate was expanded. It is the figure which mounted | wore the antenna element to the single layer board | substrate of the antenna apparatus provided in the mobile telephone of 1st Embodiment. It is a figure which shows the structure of the antenna apparatus of the multilayer substrate provided in the mobile telephone of 2nd Embodiment to which this invention is applied. It is sectional drawing to which the connection part of the antenna element and multilayer substrate of the antenna apparatus of the mobile telephone of 2nd Embodiment was expanded. It is the figure which attached the antenna element to the multilayer substrate of the antenna apparatus provided in the mobile telephone of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Antenna apparatus, 2 Communication circuit, 3 Speaker part, 4 Microphone part, 5 Display part, 6 Operation part, 7 Camera part, 8 ROM, 9 RAM, 10 Control part, 21 Single layer board, 21a One side of single layer board End, 22 Antenna element, 22a Antenna element tip, 22b Antenna element bottom surface, 22c Antenna element top surface, 23 Antenna element mold, 25 Insert hole, 25a Insert hole insert, 25b Insert Hole bottom surface part, 26 contact part, 26a contact part tip part, 26b contact part bottom part, 26c contact part top part, 27 antenna element feeding point, 30 multilayer substrate, 31 first substrate piece of multilayer substrate 32, a second substrate piece of the multilayer substrate, 33, a third substrate piece of the multilayer substrate, 41, a contact portion for feeding point connection, 42 Contact portion of the land connection, 45 multilayer board insertion hole of 50 antenna elements

Claims (8)

An antenna element;
A substrate provided with a predetermined electronic circuit;
An insertion hole for the antenna element formed in a direction orthogonal to the thickness direction of the substrate from one side end of the substrate so as to exist inside the substrate;
A contact portion for providing an electrical connection between the antenna element provided in the insertion hole and a telegraph circuit provided in the substrate;
An antenna device, wherein the antenna element is inserted into the insertion hole of the substrate, thereby electrically connecting the antenna element and a telegraph circuit provided on the substrate via the contact portion. The antenna device according to claim 1,
The contact point is
A contact point for feeding to connect to the feeding point of the antenna element;
Or a contact portion for ground for connection to the ground connection point of the antenna element,
Alternatively, an antenna device comprising: a feeding contact portion and a ground contact portion for connecting to a feeding point and a ground connection point of the antenna element, respectively. The antenna device according to claim 1 or 2, wherein
At least the insertion end portion of the antenna element inserted into the insertion hole of the substrate rides on the contact portion provided in the insertion hole, and is further easily inserted in the depth direction of the insertion hole. As described above, the antenna device is cut into a taper shape. The antenna device according to any one of claims 1 to 3,
The substrate is a multilayer substrate,
The antenna device according to claim 1, wherein the insertion hole is formed by cutting out a predetermined intermediate layer forming the multilayer substrate. In a wireless terminal device having a wireless communication circuit that performs wireless communication with a wireless base station,
An antenna element that transmits and receives signals to and from the wireless base station;
A substrate provided with the wireless communication circuit;
An insertion hole for the antenna element formed in a direction orthogonal to the thickness direction of the substrate from one side end of the substrate so as to exist inside the substrate;
An antenna device provided with a contact portion provided in the insertion hole, for electrical connection between the antenna element and a wireless communication circuit provided on the substrate;
In the antenna device, the antenna element is inserted into the insertion hole of the substrate, so that the antenna element and the wireless communication circuit provided on the substrate are electrically connected via the contact portion. A wireless terminal device. The wireless terminal device according to claim 5,
The contact portion of the antenna device is
A contact point for feeding to connect to the feeding point of the antenna element;
Or a contact portion for ground for connection to the ground connection point of the antenna element,
Alternatively, the wireless terminal device is a power supply contact point and a ground contact point for connecting to the power supply point and the ground connection point of the antenna element, respectively. The wireless terminal device according to claim 5 or 6,
An insertion end portion of the antenna element to be inserted into at least the insertion hole of the substrate of the antenna device rides on the contact portion provided in the insertion hole, and further the depth of the insertion hole. A wireless terminal device that is notched into a tapered shape so as to be easily inserted in a direction. The wireless terminal device according to any one of claims 5 to 7,
The substrate of the antenna device is a multilayer substrate,
The wireless terminal device, wherein the insertion hole of the antenna device is formed by cutting out a predetermined intermediate layer forming the multilayer substrate.

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