JP2004128982A - Insertable and extractable antenna device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insertable and extractable antenna device which uses an internal or external antenna depending on a radio wave status. <P>SOLUTION: This insertable and extractable antenna device is provided with the external antenna 11 which is freely insertable and extractable into/from electronic equipment 10 having a transmitting and/or receiving function and electrically connects an antenna main body to an antenna feeder circuit of the electronic equipment 10 through a connector device. The electronic equipment 10 has the external antenna 11 and the built-in internal antenna that is fixedly arranged. The connector device is provided with a change-over switch for switching the antenna feeder circuit from the internal antenna to the external antenna to be connected by connecting a plug 40 provided at the external antenna side to a receptacle 50 provided at the electronic equipment side. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a detachable antenna device mainly used for an electronic device using an antenna such as a PC card type portable communication device.
[0002]
[Prior art]
Generally, antennas for electronic devices equipped with a communication function include an internal antenna type that is fixedly arranged on the circuit board of the electronic device, and an antenna that projects outside the electronic device and can be expanded, contracted, and adjusted in angle. There is an external antenna type. The former is suitable for use in a place where the radio wave condition is good, and the latter is suitable for use in a place where the radio wave condition is not good.
[0003]
Conventionally, a communication device such as a PC card type mobile communication device or a mobile phone is provided with an antenna for transmitting and receiving radio waves (see Patent Document 1). As this antenna, an external antenna as shown in FIG. By using the antenna, it is possible to obtain an optimum antenna position for transmitting and receiving radio waves and storing the antenna (see Patent Document 2).
[0004]
The external antenna 1 includes a conductive longitudinal axis 3 supported by an antenna supporting member 2, a conductive intermediate bearing 4 which is rotatably mounted on the longitudinal axis 3 about the longitudinal axis 3, and an intermediate part. The bearing bracket 4 is provided with a universal joint composed of a vertical axis 3 and a horizontal axis 5 supported in an orthogonal arrangement. The antenna support member 2 is held by an electronic device such as a portable communication device. By attaching the antenna main body 6 so as to be rotatable about the shaft 5, the direction of the antenna main body 6 can be changed in accordance with transmission and reception of radio waves.
[0005]
However, the parts such as the intermediate bearing 4 constituting the universal joint are formed of a conductive metal member in consideration of the strength and the electrical connection with each part, and the connecting portion between the intermediate bearing 4 and the antenna body 6 is formed. The metal is exposed, and if static electricity is discharged from a human body or the like charged with static electricity there, there is a possibility that an electronic device circuit or the like that is conducted to the external antenna 1 may be destroyed.
[0006]
Therefore, for example, as shown in FIG. 14, the exposed metal portion of the antenna is covered with a covering material 7 made of an insulating material such as a bellows to take measures against static electricity.
[0007]
[Patent Document 1]
JP 2001-339211 A (FIG. 4)
[0008]
[Patent Document 2]
JP-A-08-265025 (paragraphs 0002 to 0009, FIGS. 10 and 11)
[0009]
[Problems to be solved by the invention]
In the case of the portable communication device such as the PC card type described above, the external antenna type has a large shape and is inconvenient to carry. However, the sensitivity of the internal antenna type alone is low depending on the place of use, and the external antenna type is often preferred.
[0010]
In addition, in the above-described conventional method for insulatingly covering an external antenna type antenna, since the metal portion exposed to the outside is covered with an insulating covering material such as a bellows, the entire antenna becomes bulky. There is a problem that the miniaturization of the electronic device to which the antenna is mounted is hindered, and that the appearance of the antenna and the electronic device to which the antenna is mounted deteriorates.
[0011]
The present invention has been made in view of such a situation of the related art, and provides a detachable antenna device that can use an internal or external antenna according to a radio wave condition, and can provide a complete countermeasure against static electricity to the antenna, and is compact. It is an object of the present invention to provide a detachable antenna device that can be formed and has a good appearance.
[0012]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the conventional problems as described above and achieve the intended object, the invention according to claim 1 is designed to be detachable from an electronic device having a transmission and / or reception function and to feed an antenna of the electronic device. A detachable antenna device having an external antenna for electrically connecting an antenna body to a circuit via a connector device is characterized.
[0013]
With this configuration, the external antenna can be attached and detached when necessary.
[0014]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the electronic device has an internal antenna built in a fixed arrangement with the electronic device, and the connector device is provided on the side of the electronic device. By connecting a plug provided on the external antenna side to the receptacle, the antenna feed circuit is provided with a changeover switch for switching from the internal antenna to the antenna main body of the external antenna, and the internal antenna is always connected to the antenna feed circuit In this state, the connection of the internal antenna to the antenna feed circuit is turned off and the connection of the external antenna is turned on by inserting the plug.
[0015]
With such a configuration, the external antenna and the internal antenna can be selectively used in accordance with the radio wave situation. In particular, the external antenna can be appropriately mounted in a place where the radio wave situation is poor, and the functionality is improved.
[0016]
According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the external antenna includes an antenna support member made of an insulating material at a base end thereof, and supports the plug of the connector device on the antenna support member. And the electronic device side has a fitting recess for fitting and supporting the antenna support member, and fitting the connector device and fitting the antenna support member to the fitting recess to form the external antenna. The electronic device is characterized by being supported.
[0017]
With such a configuration, the attachment of the external antenna to the electronic device is further strengthened. In particular, even in the case of a small electronic device, a detachable structure with high strength can be obtained without being bulky.
[0018]
According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, a locking projection for pressing a side surface of the antenna support member fitted in the fitting recess is provided on an inner surface of the fitting recess in a protruding direction. The antenna support member is provided with an engagement concave portion on the side surface of the antenna support member, in which the locking projection is fitted.
[0019]
With this configuration, the effect of preventing falling off is enhanced.
[0020]
According to a fifth aspect of the present invention, in addition to the configuration of the first to third or fourth aspects, a conductive longitudinal axis fixed to the antenna support member and in which the plug of the connector device is electrically connected, and A universal joint consisting of a conductive intermediate bearing mounted rotatably around the central axis and a horizontal axis supported on the intermediate bearing in a direction perpendicular to the longitudinal axis, the intermediate bearing comprising: On the other hand, the antenna main body is rotatably mounted around the horizontal axis as a center axis, and the vertical axis and the antenna main body are electrically connected via the universal joint. The rotating base portion is formed in a U-shaped cross section integrally having a pair of horizontal shaft supporting pieces having both edges rising on the same side, and the rotating base portion of the intermediate bearing is formed by the vertical axis. Rotatably supported at the tip In addition, the horizontal shaft is penetrated and supported by the two horizontal shaft support pieces, and an insulating piece for an intermediate bearing fitting made of an insulating material is inserted between the two horizontal shaft support pieces of the intermediate bearing fitting. An insulating piece covers the bottom surface of the intermediate bearing bracket and a portion excluding the rear surface of the opposing surfaces of the two horizontal shaft support pieces, and the antenna body integrally includes a pair of parallel bearing pieces at a base end side, The bearing piece is brought into contact with the rear side of the opposing surfaces of the two horizontal shaft supporting pieces of the intermediate bearing so as to be rotatably supported around the horizontal axis, and an insulating material is provided outside the antenna body. A cylindrical insulating sheath member having a bottom and an open end is provided, and a pair of insulating bearing pieces are provided on the open end side of the insulating sheath member. The antenna body is pivotally attached to a bearing, and the insulating bearing piece is used to face both bearing pieces of the antenna body bearing piece. Characterized in that was covered the back side of the back side and two facing surfaces of the intermediate bearing bracket horizontal shaft supporting piece.
[0021]
With this configuration, it is possible to appropriately take measures against static electricity without exposing a metal part to the outside, to reduce the size of the antenna, and to improve the appearance.
[0022]
According to a sixth aspect of the present invention, in addition to the configuration of the fifth aspect, the tip of the vertical axis is projected and fixed to the flat surface of the antenna support member, and a flange-shaped retaining head is provided at the tip of the vertical axis. And forming a U-shaped recess in the rotation base portion of the intermediate bearing from one side to a central portion thereof, fitting the recess below the head of the vertical axis, and The longitudinal axis fitted in the recessed portion is prevented from falling off by a piece.
[0023]
With this configuration, it is easy to attach the intermediate bearing to the vertical axis, and it is easy to assemble, and the number of parts that also serve as the insulating material is reduced.
[0024]
According to a seventh aspect of the present invention, in addition to the configuration of the fifth or sixth aspect, a conductive spring material is used for the two bearing pieces integrally provided on the base end side of the antenna main body, and the two bearing pieces are used. According to another aspect of the present invention, a conductive contact pressure and a rotational friction resistance are provided by elastically sandwiching the outer surfaces of both the horizontal shaft support pieces of the intermediate bearing.
With this configuration, when the antenna main body is rotated with respect to the intermediate bearing, the rotation of the antenna main body can be stopped at an arbitrary position. It can be electrically connected.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of an external antenna according to the present invention will be described with reference to the drawings.
[0026]
FIG. 1 shows an example of a use state of a detachable antenna device. Reference numeral 10 denotes an electronic device embodying the present invention, and more specifically, a PC card type portable communication device. Reference numeral 11 denotes a movable external antenna which can be attached to and detached from the electronic device 10.
[0027]
The external antenna 11 is supported by an antenna support member 12 made of an insulating material in the shape of a rectangular parallelepiped. A plug 40 that constitutes a connector device for making an electrical connection with the electronic device 10 is fixed to the antenna support member 12 on the side opposite to the external antenna support surface. The plug 40 has a grounding outer cylinder 41 made of a conductive material and a cylindrical holding spring 42 having a shape in which a vertical slot is formed in a cylinder provided inside the outer cylinder 41, and a plug pin 43 projects from the center of the spring. Is established.
[0028]
The plug pin 43 is formed integrally with a longitudinal axis 13 of an external antenna described later.
[0029]
The electronic device 10 includes a receptacle 50 constituting a connector device. The receptacle 50 is fixed to a circuit board 51 as shown in FIGS. 2 and 3, and a ground sleeve 53 fitted inside the cylindrical holding spring 42 protrudes from the front end of a molded case 52. . A pin insertion hole 54 into which the plug pin 43 is inserted is opened at the center thereof, and a spring contact piece (not shown) that comes into contact with the plug pin 43 to be inserted is provided therein. And a switch mechanism operated by insertion of a plug.
[0030]
This switch mechanism is configured to switch and connect the internal antenna 55 and the external antenna 11 provided on the circuit board to the antenna feed circuit 56, as shown in the switch circuit diagram of FIG. There is a spring contact piece b conducted to the terminal a, and a switch piece d conducted to the normally closed terminal c connected to the internal antenna 55 is always in contact with the contact piece b. Are operated so as to be separated from the switch piece d, whereby the connection to the common terminal a is switched. In addition, the code | symbol e in a figure is a ground terminal.
[0031]
The electronic device 10 also has a fitting recess 60 into which the above-described antenna support member 12 is fitted and supports the antenna supporting member 12, and an engagement protrusion 61 is provided on the inner surface of the fitting recess in the protruding direction. It is provided with force. As shown in FIGS. 1 and 2, the engaging projection 61 is formed integrally with the tip of a molded spring piece 62.
[0032]
On the other hand, an engagement recess 63 in which the engagement protrusion 61 is engaged is formed on a side surface of the antenna support member 12, and the connector device described above is inserted by inserting the antenna support member 12 into the engagement recess 60 of the electronic device 10. Are fitted to each other at the same time as the engagement protrusions 61 are fitted into the engagement recesses 63, so that a resistance force against the force of the antenna support member 12 in the exit direction is applied. In this way, the external antenna 11 is supported by the electronic device 10 by the fitting of the antenna support member 12 to the fitting recess 60 and the fitting of the connector device.
[0033]
The external antenna 11 is integrally formed with the plug pin 43 described above, and is attached to the conductive vertical axis 13 that is supported by being penetrated by the antenna support member 12. The external vertical axis 13 is rotatably attached to the vertical axis 13. A universal joint comprising a conductive intermediate bearing 14 and a horizontal axis 15 supported on the intermediate bearing 14 in a direction perpendicular to the longitudinal axis 13, and the antenna supporting member 12 is attached to the electronic device 10 such as a portable communication device. By holding the antenna body 16 so as to be rotatable about the horizontal axis 15 as a center axis with respect to the intermediate bearing 14, it is possible to obtain an optimum antenna position for transmitting and receiving radio waves, storing the antenna, and the like. Has become.
[0034]
The horizontal shaft 15 constituting the universal joint is formed of an insulating material, and as shown in FIG. 7, has a flange-shaped head 17 at one end and a tapered portion 18 having a tapered end at the other end. A step portion 19 for retaining is formed on the base end side of the base plate.
[0035]
As shown in FIG. 8, the intermediate bearing 14 has a flat rotating base 20 formed of a conductive metal member, and a horizontal axis that rises to the same side from both side edges of the rotating base 20. It is formed in a U-shaped cross section having the support pieces 21 and 21 integrally.
[0036]
An insulating piece 22 is inserted between the two horizontal shaft support pieces 21 and 21 of the intermediate bearing 14, whereby the bottom surface of the rotating base 20 and the outer surfaces of the two horizontal shaft support pieces 21 and 21 ( Except for the opposite side surfaces of the two horizontal shaft support pieces, the portions are covered.
[0037]
The turning base portion 20 is provided with a concave portion 23 formed by extending a center circular hole toward one side edge, that is, a U-shaped portion extending from one side edge to the center portion. The rotating base portion 20 is rotatably and irremovably supported by the antenna support member 12 by fitting the conductive longitudinal axis 13 protruding from the antenna support member 12 into the antenna.
[0038]
Each of the horizontal shaft support pieces 21 and 21 has a horizontal shaft insertion hole 24 through which the horizontal shaft 15 constituting the universal joint is inserted.
[0039]
The insulating piece 22 is formed of an insulating material, and has a shape in which a part of the outer peripheral surface of the disk is cut out to form a bottom surface.
[0040]
An insertion hole 26 through which the horizontal shaft 15 is inserted is opened through the center part of the disk.
[0041]
On both sides of the insulating piece 22, concave portions 25, 25 for fitting the supporting piece portions 21 and 21 of the intermediate bearing metal fitting 14 are formed, and on the bottom surface of the insulating piece 22, A retaining hole 22a into which the tip of the vertical axis 13 is inserted is formed.
[0042]
As shown in FIG. 9, when the insulating piece 22 is inserted between the two horizontal shaft support pieces 21 and 21 of the intermediate bearing metal 14, the two intermediate shaft support pieces 21 and 21 , 25, and a portion excluding the lower surface of the rotating base 20 and the outer surfaces (the back surfaces of the opposing surfaces) of the horizontal shaft support pieces 21, 21 are covered by the insulating piece 22.
[0043]
When the insulating piece 22 is inserted between the two horizontal shaft support pieces 21 and 21 of the intermediate bearing 14, the edge of the rotating base is covered and the tip of the vertical axis 13 is inserted into the retaining hole 22 a. Then, the movement of the rotating base portion 20 in the direction of the rotating radius with respect to the longitudinal axis 13 is restricted, so that the rotating base portion 20 is prevented from coming off.
[0044]
In a state where the insulating piece 22 is inserted between the two horizontal shaft supporting pieces 21 and 21 of the intermediate bearing 14, the horizontal shaft 15 is connected to the horizontal shaft supporting piece 21, the insulating piece 22 and the horizontal shaft supporting piece 21. By penetrating and penetrating, the intermediate bearing fitting 14 is prevented from coming off in the direction of the longitudinal axis.
[0045]
As shown in FIG. 11, the antenna main body 16 includes a thin and long plate-shaped main body 27, and a pair of mutually opposed parallel bearing pieces 28 protruding from both side edges of the end of the main body 27. The two bearing pieces 28, 28 are integrally formed of a conductive spring material, and the distance between the protruding ends of the bearing pieces 28, 28 is narrowed. The outer surfaces of the members 21 and 21 can be elastically clamped. The bearing piece 28 has an insertion hole 29 through which the horizontal shaft 15 is inserted.
[0046]
Further, the antenna main body 16 holds the horizontal shaft 15 on the intermediate bearing member 14 in a state where the outer surfaces of both the horizontal shaft support pieces 21 and 21 of the intermediate bearing member 14 are elastically held between the two bearing pieces 28 and 28. By being rotatably supported about the center of rotation, it is electrically connected to the intermediate bearing fitting 14, and the bearing piece 28 has a suitable conductive contact pressure against the outer surface of the horizontal shaft support piece 21. , A rotational frictional resistance is obtained, so that the shaft is electrically connected to the longitudinal axis 13 via a universal joint.
[0047]
As shown in FIG. 10, a bottomed cylindrical insulating sheath member 30 made of an insulating material and having an open end is placed on the outside of the antenna body 16 so that the antenna body 16 is not exposed to the outside.
[0048]
A pair of insulating bearing pieces 31, 31 facing each other are formed at the base end of the insulating sheath member 30, and the horizontal axis is pivotally supported at the center of the insulating bearing pieces 31, 31. Through holes 32, 32 are formed, and in the horizontal shaft through hole 32, an enlarged diameter portion 33 in which the head 17 of the horizontal shaft 15 fits with each other and a step portion 34 for retaining are formed, respectively.
[0049]
When the insulating sheath member 30 is put on the antenna body 16, the bearing pieces 28, 28 of the antenna body 16 are arranged on the opposing surfaces of the insulating bearing pieces 31, 31 along the opposing surface of the insulating bearing piece 31. It is supposed to be.
[0050]
The longitudinal axis 13 has a flange-shaped retaining head 36 formed at the tip, and the retaining head 36 is provided at the base of the protruding portion of the longitudinal axis 13 from the antenna support member, at the rotation base 20. Are formed by forming an annular concave groove 37 whose diameter is substantially the same as the width of the concave portion 23 (that is, the diameter of the central circular hole).
[0051]
By fitting the concave portion 23 into this annular concave groove 37, the periphery of the concave portion 23 of the rotating base portion abuts below the retaining head 36, and the rotating base portion 20 is rotatable with respect to the longitudinal axis 13. In addition, it cannot be prevented from falling off in the axial direction, and is electrically connected.
[0052]
The retaining head 36 is inserted into a retaining hole 22 a formed on the bottom surface of the insulating piece 22 when the vertical axis 13, the intermediate bearing 14 and the insulating piece 22 are assembled. The rotation base portion 20 is prevented from coming off in the direction of the radius of rotation of the vertical axis.
[0053]
Reference numeral 38 in the figure denotes an O-ring made of an elastic material. The O-ring 38 allows the intermediate bearing 14 to rotate with respect to the antenna supporting member 12 so as to stop the rotation at an arbitrary position. It has become.
[0054]
In the external antenna 11, the bottom surface of the rotating base is configured to be covered by the flat surface 12 a of the antenna support member 12 having the longitudinal axis 13 protruding therefrom. Due to the insulated bearing pieces 31, 31, both outer surfaces of the antenna main body bearing pieces 28, 28 (the back side of the opposed faces of both bearing pieces) and both outer faces of the intermediate bearing horizontal shaft support pieces 21, 21 (both opposed faces) Back side).
[0055]
That is, the antenna main body bearing piece 28 and the intermediate bearing horizontal shaft support piece 21 which are overlapped and electrically connected to each other are covered by the insulating bearing piece 31 of the insulating sheath member 30 so that the metal part is not exposed to the outside. ing.
[0056]
Therefore, in the external antenna 11, there is no metal part exposed to the outside, and an antistatic measure is taken.
[0057]
In the above-described embodiment, the example in which the external antenna is adapted to the PC card type portable communication device has been described. However, the present invention is applicable to all electronic devices using the antenna, including the portable communication device such as a mobile phone. Can be done.
[0058]
【The invention's effect】
As described above, the detachable antenna device according to the present invention is configured such that the external antenna is detachable via the connector device. Since it is detachable, the electronic device using the electronic device does not require a space for an external antenna, and the electronic device can be downsized.
[0059]
In addition, by using a connector device with a changeover switch mechanism, the power supply circuit is switched from the internal antenna to the external antenna by mounting the external antenna, so that the internal antenna and the external antenna can be switched as necessary As a result, transmission and reception corresponding to a wide range of radio wave conditions become possible.
[0060]
Further, the thickness of the electronic device is about 5 mm or less by supporting the electronic device by fitting the antenna support member and the fitting concave portion on the electronic device side in addition to the connection by the connector device for power supply. It can be safely attached to and detached from the thin electronic device without damaging the device.
[0061]
Further, the external antenna has an insulating sheath member in which the bottom surface of the rotating base is covered with a flat surface of the antenna support member, and the outer surface of the horizontal shaft support piece and the bearing piece of the antenna body are in contact with each other. , The metal part is not exposed to the outside, the appearance is good, complete electrostatic measures are taken, and the antenna can be miniaturized.
[0062]
In addition, a flange-shaped retaining head is formed at the tip of the longitudinal axis, and a U-shaped concave portion is formed on the rotation base portion of the intermediate bearing from one side to a central portion thereof, and the concave portion is formed as the concave portion. By fitting below the head of the vertical axis and preventing the vertical axis fitted in the concave portion by the insulating piece from falling off, attachment of the intermediate bearing bracket to the vertical axis becomes easy, and assembly is facilitated. And the number of components that also serve as the insulating material is reduced.
[0063]
Furthermore, by providing the head at the tip of the vertical axis by forming an annular groove at the base of the protruding portion from the antenna support member, the rotating base can be suitably supported on the vertical axis, Since no other parts are required for retaining the base portion, the size can be reduced.
[0064]
A conductive spring material is used for both bearing pieces integrally provided on the base end side of the antenna main body, and the outer surfaces of the two horizontal shaft support pieces of the intermediate bearing bracket are elastically held between the two bearing pieces. Thereby, when the antenna main body is rotated with respect to the intermediate bearing, the rotation of the antenna main body can be stopped at an arbitrary position, and the antenna main body can be suitably electrically connected to the intermediate bearing. Can be.
[0065]
The horizontal axis is formed of an insulating material, has a flange-shaped head on one end side, and forms a tapered portion having a thinner distal end side on the other end side and a retaining step on the base end side of the tapered portion, Exposing the metal part to the outside by providing the enlarged diameter part and the retaining step part for retaining the head of the horizontal axis in the horizontal axis through hole of each insulating bearing piece part of the insulating sheath member. Therefore, the antenna main body can be favorably pivoted to the intermediate bearing.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a portable communication device using an external antenna according to the present invention.
FIG. 2A is a partial vertical cross-sectional view showing an external antenna mounting portion on the electronic device side of the electronic device, and FIG. 2B is a partial horizontal cross-sectional view of the same.
FIG. 3A is a front view of a receptacle part of the same, and FIG. 3B is a side view of the same.
FIG. 4 is a circuit diagram of the same.
5 (a) is a plan view showing the external antenna in FIG. 1, and FIG. 5 (b) is a side view thereof.
FIG. 6 is a sectional view taken along line AA in FIG.
FIG. 7 is a plan view showing a horizontal axis in FIG.
FIG. 8 is an exploded perspective view showing the universal joint in FIG.
FIG. 9A is a side view showing a state where an insulating piece is inserted into an intermediate bearing, and FIG. 9B is a longitudinal sectional view of the same.
FIG. 10 is a transverse sectional view showing a covering state of the antenna body in FIG. 1;
FIG. 11A is a plan view showing the antenna main body of the above, and FIG. 11B is a side view of the same.
FIG. 12 is a front view showing the antenna support member in FIG. 1;
FIG. 13A is a side view showing an example of a conventional external antenna, and FIG. 13B is a front view thereof.
FIG. 14 is a perspective view showing a state where countermeasures against static electricity are given to the external antenna according to the third embodiment.
[Explanation of symbols]
a Common terminal b Spring contact piece c Normally closed terminal d Switch piece e Ground terminal 10 Electronic device (portable communication device)
DESCRIPTION OF SYMBOLS 11 External antenna 12 Antenna support member 13 Vertical axis 14 Intermediate bearing bracket 15 Horizontal axis 16 Antenna body 17 Head 18 Tapered part 19 Step part 20 Rotation base part 21 Horizontal axis support piece part 22 Insulation piece 22a Retaining hole 23 Depression Portion 24 Horizontal shaft insertion hole 25 Recess 26 Insertion hole 27 Main body 28 Bearing piece 29 Insertion hole 30 Insulating sheath member 31 Insulated bearing piece 32 Horizontal shaft through hole 33 Large diameter portion 34 Step 35 Connection member 36 Retaining head Part 37 Annular concave groove 38 O-ring 40 Plug 41 Grounding outer cylinder 42 Cylindrical holding spring 43 Plug pin 50 Receptacle 51 Circuit board 52 Mold case 53 Earthing sleeve 54 Pin insertion hole 55 Internal antenna 56 Antenna feeding circuit 60 Fitting recess 61 Mating projection 62 spring piece 63 engaging recess

Claims (7)

A detachable antenna device that is detachable from an electronic device having a transmission and / or reception function and includes an external antenna that electrically connects an antenna body to an antenna feed circuit of the electronic device via a connector device. . The electronic device has an internal antenna built in a fixed arrangement with the electronic device, and the connector device has a plug provided on the external antenna side coupled to a receptacle provided on the electronic device side, An antenna feed circuit is provided with a changeover switch for switching from the internal antenna to the antenna main body of the external antenna. The internal antenna is always connected to the antenna feed circuit, and the internal antenna is connected to the antenna feed circuit by inserting the plug. The detachable antenna device according to claim 1, wherein the connection is turned off and the connection of the external antenna is turned on. The external antenna is provided with an antenna support member made of an insulating material at a base end thereof, the plug of the connector device is supported by the antenna support member, and the antenna support member is fitted and supported on the electronic device side. 3. The electronic device according to claim 1, further comprising a fitting concave portion, wherein the external antenna is supported by the electronic device by fitting the connector device and fitting an antenna support member to the fitting concave portion. 4. Detachable antenna device. On the inner surface of the fitting recess, a locking projection for pressing a side surface of the antenna support member fitted into the fitting recess is provided urged in a protruding direction, and the locking projection is provided on a side surface of the antenna support member. 4. The detachable antenna device according to claim 3, further comprising an engagement recess into which the projection is fitted. A conductive vertical axis fixed to the antenna support member, and a plug of the connector device is electrically connected, and a conductive intermediate bearing fitting rotatably mounted on the vertical axis with respect to the vertical axis, The intermediate bearing is provided with a universal joint composed of a horizontal axis supported in an orthogonal arrangement with the longitudinal axis, and an antenna body is attached to the intermediate bearing so as to be rotatable about the horizontal axis as a center axis. Conducting the shaft and the antenna body through the universal joint,
The intermediate bearing is formed in a U-shaped cross-section integrally having a flat-plate-shaped pivot base portion and a pair of horizontal shaft support pieces each having both edges of the pivot base portion raised on the same side,
Along with the rotation base portion of the intermediate bearing metal being rotatably supported at the tip of the vertical axis, the horizontal axis is passed through and supported by the two horizontal axis support pieces,
An insulating piece for an intermediate bearing fitting made of an insulating material is inserted between the two horizontal shaft supporting pieces of the intermediate bearing fitting, and the insulating piece is used to insert a rear face of the bottom surface of the intermediate bearing fitting and the opposite surfaces of the two horizontal shaft supporting pieces. Cover the parts except
The antenna body is integrally provided with a pair of parallel bearing pieces on the base end side, and the bearing pieces are brought into contact with the back surfaces of the opposing surfaces of the two horizontal shaft support pieces of the intermediate bearing fitting, thereby obtaining the horizontal bearing piece. To be rotatable around the axis,
On the outside of the antenna body, a cylindrical insulating sheath member having a bottom and formed with an insulating material and having one open end is covered, and a pair of insulating bearing pieces are provided on the open end side of the insulating sheath member. The bearing piece is pivotally attached to the intermediate bearing with the horizontal axis, and the insulating bearing piece is used to oppose the opposite side of the bearing piece facing portion of the antenna main body and the intermediate bearing horizontal shaft support piece. The detachable antenna device according to claim 1, wherein a back surface of the surface is covered. The tip of the vertical axis is projected and fixed to the flat surface of the antenna support member, and a flange-like retaining head is formed at the tip of the vertical axis, and the rotation base portion of the intermediate bearing is provided with the same. A U-shaped concave portion is formed from one side to the central portion, the concave portion is fitted below the head of the vertical axis, and the vertical axis fitted to the concave portion by the insulating piece is prevented from falling off. The detachable antenna device according to claim 5, wherein An electrically conductive spring material is used for both bearing pieces integrally provided on the base end side of the antenna body, and the outer surfaces of the two horizontal shaft support pieces of the intermediate bearing bracket are elastically held between the two bearing pieces. 7. The detachable antenna device according to claim 5, wherein the detachable antenna device has a conductive contact pressure and a rotational friction resistance.

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