JP3153112B2 - Antenna support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotatable support device for an antenna used for a portable telephone or the like and called a PHS (Personal Handy Phone System) antenna.

[0002]

2. Description of the Related Art A PHS antenna is mounted on a housing of a portable telephone or the like so as to be rotatable, for example, by 180 degrees.
The structure is as shown in FIG. 11, for example, and the antenna A is covered with rubber, elastomer-2, or the like, and its base end is rotatably attached to the housing 3 such as a telephone around the axis O. . That is, a shaft 4 made of a conductor is fixed to the base end of the antenna A, and the shaft 4 is rotatably inserted into a hole of the housing 3. Further, an insulating tubular body 6 is inserted into the shaft portion 4, and the L-shaped bent base end of the antenna A is inserted into the tubular body 6, and the L-shaped bent base end is coaxial by soldering. It is connected to the center conductor 7a of the cable 7. The center conductor 7a is connected to one terminal of an antenna circuit (not shown). The other terminal of the antenna circuit passes through the outer conductor 7b of the coaxial cable 7 to the
Connection section 8. A washer 9 is fitted around the outer periphery of the shaft 4, and a male screw 4 is attached to the end of the shaft 4.
The shaft portion 4 is not detached from the housing 3 by a nut 10 screwed into the male screw.

[0003]

In the above-mentioned PHS antenna mounting apparatus, when the antenna A is rotated around the axis O, the nut 1 is formed together with the shaft 4 which is integral with the antenna A.
0 and the insulating cylinder 6 also rotate. As a result, the core wire forming the central conductor 7a of the coaxial cable 7 is twisted, and the soldered portion 11 which is a connection portion between the core wire and the antenna and the connection portion formed by soldering the outer conductor 7b and the housing 3 are formed. There is a problem that the base portion 8 is easily broken and detached. In addition, since the nut 10 rotates together with the shaft 4, there is a problem that the attachment of the shaft 4 to the housing 3 by tightening the nut 10 is loosened.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a rotating operation of an antenna which does not give a twist to a core wire or an outer conductor of a coaxial cable, and is therefore similar to soldering. An object of the present invention is to provide an antenna supporting device which is excellent in durability without damaging a connecting portion and which can smoothly rotate an antenna.

[0005]

According to the present invention, an object of the present invention is to provide an antenna support device for supporting an antenna on a housing so as to be rotatable around a rotation axis, wherein the housing has a coaxial axis with the rotation axis. Insulated hollow cylindrical support is fixed,
On the rotation supporting portion of the antenna, a conductive hollow rotating shaft that is guided around the outer peripheral surface of the hollow cylindrical support and is rotatable around the support is fixed, and the antenna is mounted on the hollow cylindrical support by the hollow shaft. A core contact constituted by a spring pin is fitted in the center of the insulating hollow cylindrical support in the axial direction thereof, and is configured to be rotatably guided via a rotation shaft. Of the core contact is connected to one terminal of the high-frequency circuit, and the tip of the conductive hollow rotary shaft is connected to the second terminal of the antenna circuit. And the base end of the conductive hollow rotary shaft is connected to the other terminal of the high-frequency circuit.

Another object of the present invention is to provide an antenna support device for supporting an antenna on a housing so as to be rotatable around a rotation axis, wherein the housing has an insulating hollow cylindrical shape coaxial with the rotation axis. A support is fixed, and a conductive hollow rotation shaft that is guided around the outer peripheral surface of the hollow columnar support and is rotatable around the support is fixed to a rotation support portion of the antenna, and the antenna is fixed to the hollow circular shape. It is configured to be rotatably guided to the columnar support via the hollow rotary shaft, and a center conductor is fixed to a central portion of the insulating hollow columnar support in an axial direction thereof. Is connected to a first terminal of the antenna circuit, and has an inner spring pin having a proximal end connected to one terminal of the high-frequency circuit, and an outer conductor having one end connected to the other terminal of the high-frequency circuit. Coaxial conductor member The top end of the spring pin is fixed to the housing, the other end of the center conductor is brought into contact with the other end of the center conductor in a conductive relationship, and the other end of the outer conductor is connected so as to be in sliding contact with the base end of the conductive hollow rotary shaft. Further, the present invention is also solved by an antenna support device wherein the tip of the conductive hollow rotary shaft is connected to the second terminal of the antenna circuit.

Still another object of the present invention is to provide an antenna support device for supporting an antenna on a housing so as to be rotatable around a rotation axis, wherein the antenna support device is pressed by a first terminal and a tip of an antenna circuit in a rotation axis direction. A core contact formed by a spring pin that is in contact with and connected to a high-frequency circuit at a base end, an insulating hollow cylindrical support surrounding the core contact, and guided by the outer peripheral surface of the hollow cylindrical support. A conductive hollow rotating shaft rotatably supported around the support, connected to the second terminal of the antenna circuit at the distal end and connected to the high-frequency circuit at the proximal end, and the insulating hollow cylindrical support. A fixed core contact fixing plate,
An antenna support device, which is provided between the core contact fixing plate and the antenna and has a fixing member for fixing the antenna support device to the housing, and a pressing means for pressing the fixing member toward the antenna. Achieved.

According to the present invention, the conductive hollow rotary shaft fixed to the rotary support portion of the antenna is guided by the outer peripheral surface of the insulating hollow cylindrical support supported by the housing so that it can rotate around the support. Therefore, the rotation of the antenna is stably performed, and the connecting means for connecting the terminal and the antenna circuit is a core constituted by a spring pin which is not rotated by the antenna even if it is rotated. Since the connection means is connected to the contact, no twisting of the connection means occurs.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention. In FIG. 1, reference numeral 3 denotes a housing made of an insulating material such as a portable telephone, and a fixing bracket 13 is attached to the outside (left side in the figure) of the recessed mounting portion 3a of the housing 3;
Supports the base of the antenna A. Antenna A is covered with rubber, elastomer 2 or the like,
It can be rotated around the rotation axis OO. As shown in FIG. 2, the fixing bracket 13 has mounting holes 14, 14 to the housing 3 at both ends. A support hole 15 is formed in the center of the fixing bracket 13.

As shown in FIG. 3, which is an enlarged view of a main part of FIG. 1, a conductive hollow rotary shaft 16 is fixed to the base of the antenna A so as to be located on the axis OO. The hollow rotary shaft 16 is fixed to the base of the antenna A via a reinforcing plate 18, and is rotatably inserted into the support hole 15 of the fixing bracket 13. A spring washer 19 is fitted on the outer periphery of the hollow rotary shaft 16 inside the fixing bracket 13 (right side in FIG. 3), and a fixing ring 20 is further fitted. The fixing ring 20 is fixed by a caulking portion 22 at the inner end of the hollow rotary shaft 16 so as to press the spring washer 19. Thus, the hollow rotary shaft 16 is rotatably supported in the support hole 15 of the fixture 13.

A hollow cylindrical support 24 is fixed so as to be in contact with the outer surface of the recessed mounting portion 3a of the housing 3. The hollow cylindrical support 24 is made of an electrically insulating material and is inserted into the hollow rotary shaft 16. Therefore, the hollow rotary shaft 16 is rotatably supported around the hollow cylindrical support 24. Hollow cylindrical support 24
A conductive tube 25 is interposed between the shaft and the hollow rotary shaft 16. The conductive tube 25 can be split in the axial direction, for example, at six locations so as to be elastically deformable. A terminal 26 is inserted into and fixed to the recessed mounting portion 3a of the housing 3 so as to be located around the axis OO. A compression spring 27 is interposed between the terminal 26 and the conductive tube 25, The conductive tube 25 is kept in contact with the base surface of the antenna A. The terminal 26 has a shape divided in the circumferential direction.

A spring pin 28 is press-fitted and fixed to the center of the hollow cylindrical support 24. Spring pin 2
8, a cylindrical portion 29 of a conductive material, as shown in FIG.
It has a conductive contact pin 30 which is slidably inserted into the cylindrical portion 29 and has a tip portion 31 protruding. The contact pin 30 is elastically pressed outward by a spring 32 and is prevented from coming off by a caulking portion 33. I have. The base end of the cylindrical portion 29 is formed as a terminal 34. The tip 31 of the contact pin 30 is normally connected to the first antenna circuit exposed on the surface of the antenna A.
(See below) in a conductive relationship. In addition, the terminal 34 protrudes inside the mounting portion 3a of the housing. The spring pin 28 constitutes a core contact.

A coaxial cable 36 has a central conductor 36.
a is connected to the center terminal 34 by soldering or the like, and the outer conductor 36b is connected to the outer terminal 26 by soldering or the like. The coaxial cable 36 is connected to a high-frequency electric circuit such as a cellular phone (not shown).

As shown in FIG. 5, on the base end surface of the antenna A, a printed circuit is used to connect a center conductive portion 40 with which the contact pin 31 contacts, and a grounding outer surface with which the tip of the conductive tube 25 contacts. A conductive portion is formed, and an insulating portion 41 is interposed between the conductive portions 40 and. The center conductive portion 40 forms a first terminal of the antenna A.
Further, the outer conductive portion 42 is grounded. The outer conductive portion 42 forms a second terminal of the antenna A. As shown in FIG. 3, the cover 2 of the antenna A can be provided with an engagement ball 44 for click stop when the antenna is rotated by elastically pressing with a spring.

Next, the operation of the above-described antenna support device will be described. In particular, in FIG. 3, the antenna A can be freely rotated around the rotation axis OO. When the antenna A rotates, the conductive hollow rotary shaft 16 fixed to the antenna A also rotates around the axis OO. At this time,
The hollow columnar support 24 is fixed to the housing 3 and does not rotate, but supports the hollow rotary shaft 16 and assists its rotation. On the other hand, the conductive tube 25 is in sliding contact with the inner surface of the hollow rotary shaft 16 and maintains a contact relationship with the hollow rotary shaft 16. Also, while the antenna A is being rotated, its rotation axis O
The tip 31 of the contact pin 30 of the spring pin 28 on −O continues to contact the conductor 40 on the rotation center of the antenna, and the spring pin 28 itself does not rotate with the columnar support 24.

Therefore, the terminal 3 of the spring pin 28
4 and the terminal 26 on the outer periphery thereof maintain a stable connection between the center conductor 36a and the outer conductor 36b of the coaxial cable 36 without being rotationally displaced with the rotation of the antenna A. Note that the hollow rotary shaft 16 functions as the ground side when receiving and transmitting the antenna A.

As described above, in this embodiment of the present invention, only the hollow rotary shaft rotates with the rotation operation of the antenna, and the other members are stationary without being affected by the rotation. Unlike the conventional example, there is no problem that the soldered portion to the rotating cable is damaged or the mounting portion of the antenna is loosened. Since the hollow rotation shaft rotates while being supported by the columnar support, the rotation of the antenna can be performed smoothly.

Further, in the conventional example, since the rotation of the antenna affects the coaxial cable, a certain length (for example, 10 mm) of the connecting portion of the central conductor and the external conductor exposed from the coaxial cable is required. However, in the above embodiment, the length required for soldering (for example, 2 m
m), the exposed core wire can be shortened, and the high-frequency characteristics are improved accordingly.

FIGS. 6 and 7 show a modification of the embodiment described above. In this modified embodiment, the same parts as those in the previous embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different points will be described. In this modified embodiment, the base end of the hollow cylindrical support 24 is Is attached to the core contact fixing plate 43 which is a separate member from the housing 3 instead of being directly attached to the attaching portion 3a. Core contact fixing plate 43
Has a U-shaped cross section as shown in FIG. 7, and the bottom of the U-shape is fixed to the fixing bracket 13. Therefore, the core contact fixing plate 43 is indirectly fixed to the housing 3 via the fixing bracket 13. The fixing metal 13 is pressed against the antenna A by the fixing ring 20 via the spring washer 19. The operation of this modified embodiment is the same as the operation described above.

FIG. 8 shows still another modification of the embodiment shown in FIGS. 1 to 5 are denoted by the same reference numerals and the description thereof will be omitted. Only different portions will be described. In this modified example, a portion between the fixing bracket 13 and the antenna coating 2 is provided. A washer 51 is interposed, and a plate-shaped spring washer 52 is interposed between the fixing bracket 13 and the fixing ring 20. further,
A tubular recess is provided on the outer peripheral surface of the hollow cylindrical member 24 on the side close to the antenna, and a step 54 is formed at the end thereof.
A coil spring 53 is housed in the tubular recess so as to be located between the conductive tube 56 and the conductive tube 56, and the conductive tube 56 is resiliently pressed leftward in FIG. Contact. Hollow cylindrical member 24
A cylindrical terminal 26 is fixed to the outer periphery of the terminal so as to cover a part of the coil spring 53 and the conductive tube 56. The terminal 26 is circumferentially divided on the side close to the coaxial cable 36. The structure of the spring pin 28 is the same as that described above. It is clear that the same operation and effect as those of the embodiment shown in FIGS. In this modified example, the ground is the terminal 26, the conductive hollow rotary shaft 16, or the conductive tube 5.
Taken through 6.

FIG. 9 shows a slightly modified version of the modification shown in FIG. In this modification, in the configuration of FIG. 8, the coil spring 53 and the conductive tube 56 are omitted, and the end 26a of the terminal 26 near the antenna A is bent inward in the radial direction. As in the case of FIG. 8, an annular concave portion 60 is provided on the outer peripheral surface of the hollow cylindrical member 24 on the side near the antenna. The portion of the terminal 26 near the antenna A is divided in the axial direction and is divided in the circumferential direction. At the time of assembling the antenna support device, the hollow cylindrical support 2 is inserted into the conductive hollow rotary shaft 16.
When inserting the terminal 4 and the terminal 26, the end 26a of the terminal 26 near the antenna A is bent inward in the radial direction to facilitate insertion. After the insertion, the conductive contact between the hollow rotary shaft 16 and the terminal 26 is ensured by the elastic deformation of the terminal 26. In the state shown in FIG. 9, the end 26a of the terminal 26 near the antenna A enters the annular concave portion 60.
The operation and effect of this modification are the same as those of the embodiment shown in FIGS.

FIG. 10 shows a second embodiment of the present invention. In this embodiment, the spring pin 28 is not inserted into the center of the hollow cylindrical support 24a fitted inside the conductive hollow rotary shaft 16 in FIG. , A simple rod-shaped center conductor 61 is inserted. This center conductor 6
One end of 1 is connected to the first terminal of the antenna circuit of the antenna A. On the other hand, an insulating hollow columnar support 24b having a configuration similar to that of the hollow columnar support 24a is coaxially mounted on the outer surface of the concave mounting portion 3a of the housing 3, and this hollow columnar support is provided. A spring pin 28 is fixed to the center of the body 24b by press fitting. The spring pin 28 has the same configuration as the above-described spring pin, and the contact pin 31 at the distal end thereof is pressed against the other end, that is, the proximal end of the rod-shaped center conductor 61. Therefore, the center conductor 61 and the spring pin 28 are coaxially and electrically connected. A terminal 26 similar to the terminal described above is provided at one end of the outer periphery of the hollow cylindrical support 24b.
A conductive tube 62 is fitted to the other end so as to be movable in the axial direction, and a coil spring 63 is interposed between the conductive tube 62 and the terminal 26. .
The conductive tube 62 is in contact with the conductive hollow rotary shaft 16 by a coil spring 63, and the electrical contact between the two is maintained. The hollow rotary shaft 16 is grounded via a second terminal of the antenna circuit. The connection between the terminals 26 and 34 and the coaxial cable 36 is the same as in the above embodiment.

In this embodiment, when the antenna A is rotated, the hollow rotary shaft 16 is guided around the hollow cylindrical support 24a and smoothly rotates. On the other hand, since the hollow cylindrical support 24b is supported by the mounting portion 3a of the housing 3 and does not rotate, the distal end 31 of the spring pin 28 is not rotated.
Are in sliding contact with the end face of the rotating central conductor 61, and the conductive tube 62 is in sliding contact with the end face of the rotating hollow rotary shaft 16 to maintain the conductive relationship. Therefore, antenna A
Does not exert any force on the terminal 34 or the outer terminal 26 of the spring pin 28, and does not affect the coaxial cable 36. Other points are the same as in the above-described embodiment.

[0025]

As described above, according to the present invention, the antenna has an integral hollow rotary shaft, and the hollow rotary shaft rotates while being guided by the cylindrical support fixed to the housing. , The rotation of the antenna is performed smoothly. Since the coaxial cable connected to the antenna circuit is connected to a terminal which is not mechanically affected by the rotation of the antenna, it is possible to completely prevent the rotation of the antenna from causing damage at the terminal. . In addition, since the electrical connection between the rotating part on the antenna side and the fixed part on the housing side is made coaxially, the center part is made by contact via a spring pin, and the outer part is made by sliding contact. A conduction state is obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of an antenna support device of the present invention.

FIG. 2 is a left side view of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 1;

FIG. 4 is an enlarged sectional view of a spring pin.

FIG. 5 is a diagram showing a printed circuit on an antenna surface.

FIG. 6 is a view showing a modification of the embodiment of FIG. 1;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a view showing another modification of the embodiment of FIG. 1;

FIG. 9 is a view showing still another modification of the embodiment of FIG. 1;

FIG. 10 is a sectional view of another embodiment of the antenna support device of the present invention.

FIG. 11 is a sectional view showing a conventional antenna support device.

[Explanation of symbols]

 Reference Signs List A antenna 3 housing 3a housing mounting part 13 fixing bracket 14 mounting hole 16 conductive hollow rotary shaft 18 reinforcing plate 19 spring washer 20 fixing ring 24 hollow cylindrical support 24a hollow cylindrical support 24b hollow cylindrical support Reference Signs List 25 conductive tube 26 terminal 28 spring pin 31 contact pin 32 spring 34 terminal 36 coaxial cable 36a center conductor 36b outer conductor 40 center conductor 41 insulating part 42 outer conductor 43 core contact fixing plate 51 washer 52 spring washer 53 coil spring 56 Conductive tube 60 tubular recess 61 rod-shaped center conductor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-263772 (JP, A) JP-A-5-275914 (JP, A) JP-A-9-18215 (JP, A) 182074 (JP, A) JP-A-60-158357 (JP, A) JP-A-9-251422 (JP, A) JP-A-7-29772 (JP, U) JP-A-4-94289 (JP, U) Japanese Utility Model 3-30375 (JP, U) Japanese Utility Model 4-102591 (JP, U) Japanese Utility Model 2-95911 (JP, U) Japanese Utility Model 62-56262 (JP, U) Japanese Utility Model 5-63049 (JP, U) JP-A 62-123666 (JP, U) JP 2-18569 (JP, Y2) JP 7-37263 (JP, Y2) JP 2-33362 (JP, Y2) 5-1915 (JP, Y2) 7-9346 (JP, Y2) 7-37262 (JP, Y2) -49449 (JP, Y2) (58 ) investigated the field (Int.Cl. ^7, DB name) H01Q 1/12 H01Q 1/24

Claims (4)

(57) [Claims] An antenna support device for supporting an antenna on a housing so as to be rotatable around a rotation axis, wherein the housing includes:
An insulative hollow cylindrical support is fixed coaxially with the rotation axis, and a conductive hollow rotatable around the support guided by the outer peripheral surface of the hollow cylindrical support is provided on the rotation support portion of the antenna. The rotating shaft is fixed, the antenna is configured to be rotatably guided to the hollow cylindrical support via the hollow rotating shaft, and the center of the insulating hollow cylindrical support is A core contact constituted by a spring pin is fitted in the axial direction, and the tip of the core contact is brought into contact with the first terminal of the antenna circuit in a conductive relationship, and the base end of the core contact is connected to one terminal of the high-frequency circuit. Connected, a tip of the conductive hollow rotary shaft is connected to a second terminal of the antenna circuit, and a base end of the conductive hollow rotary shaft is connected to the other terminal of the high-frequency circuit. Antenna support device that. 2. An elastic conductor connected to said other terminal of a high-frequency circuit is inserted between said conductive hollow rotary shaft and said insulating hollow cylindrical support. The antenna support device according to claim 1. 3. An antenna supporting device for supporting an antenna on a housing so as to be rotatable around a rotation axis, wherein the housing includes:
An insulative hollow cylindrical support is fixed coaxially with the rotation axis, and a conductive hollow rotatable around the support guided by the outer peripheral surface of the hollow cylindrical support is provided on the rotation support portion of the antenna. The rotating shaft is fixed, the antenna is configured to be rotatably guided to the hollow cylindrical support via the hollow rotating shaft, and the center of the insulating hollow cylindrical support is A central conductor is fixed in the axial direction, and one end of the central conductor is connected to a first terminal of the antenna circuit, while an inner spring pin having a proximal end connected to one terminal of the high-frequency circuit, and another end of the high-frequency circuit. A coaxial conductor member having an outer conductor having one end connected to the terminal is fixed to the housing, the tip of the spring pin is brought into contact with the other end of the center conductor in a conductive relationship, and the other end of the outer conductor is Said guide Are connected to sliding contact with the proximal end of sexual hollow rotary shaft, the distal end of the conductive hollow rotary shaft antenna supporting apparatus characterized by being connected to the second terminal of the antenna circuit. 4. An antenna support device for supporting an antenna on a housing so as to be rotatable about a rotation axis, wherein said antenna support device presses and contacts a first terminal of an antenna circuit in a direction of the rotation axis at a distal end and a high-frequency circuit at a base end. A core contact constituted by a spring pin connected to the core contact; an insulating hollow cylindrical support surrounding the core contact; and a rotatably supported around the support guided by the outer peripheral surface of the hollow cylindrical support. A conductive hollow rotary shaft connected to the second terminal of the antenna circuit at the distal end and connected to the high-frequency circuit at the proximal end, and a core contact fixing plate fixed to the insulating hollow cylindrical support. A fixing member provided between the core contact fixing plate and the antenna, the fixing member fixing the antenna support device to the housing; and a pressing means for pressing the fixing member toward the antenna. Antenna support and wherein the.