JP3607875B2 - Coaxial plug - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to an L-shaped coaxial plug attached to the tip of a coaxial cable.
[0002]
[Prior art]
Receiver devices such as televisions and satellite broadcast tuners are equipped with coaxial connectors as input and output terminals for high-frequency signals, and by attaching a coaxial plug attached to the end of the coaxial cable to this coaxial connector. The reception signal is input / output. In this case, a signal (IF signal) converted to an intermediate frequency by the satellite antenna is input to the satellite broadcast tuner. This IF signal is generally output from a coaxial connector provided in a series unit provided on a wall or the like, and this series unit and a satellite broadcast tuner are connected by a coaxial cable having coaxial plugs installed at both ends. Will come to be.
A configuration example of a conventional coaxial plug attached to the end of such a coaxial cable is shown in FIGS. 15 is an exploded view of a conventional coaxial plug, FIG. 16 is a view showing one step of the assembly process, and FIG. 17 is an external view of the assembled conventional coaxial plug. 18 is a sectional view of the assembled conventional coaxial plug.
[0003]
The conventional coaxial plug 100 shown in FIGS. 17 and 18 includes a mold part 111 and a plug outer conductor 112. In the coaxial plug 100, a plug pin 115 is disposed substantially on the central axis in the plug outer conductor 112, and an internal spring 116 is disposed along the inner peripheral surface of the plug outer conductor 112. Furthermore, an insulating ring portion 114 is disposed on the plug outer conductor 112. The coaxial plug 100 can be fixed to the coaxial connector by inserting the plug outer conductor 112 in the coaxial plug 100 configured as described above into the coaxial connector. At this time, the plug pin 115 is inserted into and electrically connected to the center contact in the coaxial connector, and the plug outer conductor 112 is electrically connected to the connector main body of the coaxial connector.
[0004]
Here, the plug outer conductor 112 includes a cylindrical portion 112a inserted into the coaxial connector and a cable crimping portion 112b extending substantially orthogonally from the upper end of the cylindrical portion 112a. The cable crimping portion 112b includes a pair of crimping pieces so that the coaxial cable 113 can be crimped. Further, the coaxial cable 113 to which the coaxial plug 100 is attached includes a core wire 113a, an internal insulator 113b in which the core wire 113a is disposed substantially along the central axis, and an aluminum tape wound around the internal insulator 113b. It is comprised from the comprised sheath part 113c, the braided wire 113d arrange | positioned so that the sheath part 113c may be covered, and the jacket currently shape | molded on the braided wire 113d. As described above, the coaxial cable 113 has a double sheath structure including the sheath portion 113c and the braided wire 113d so that the high frequency characteristics are improved.
[0005]
Next, the assembly process of the coaxial plug 100 will be described with reference to FIG.
First, as shown in FIG. 15, the jacket at the tip of the coaxial cable 113 is removed, and the exposed braided wire 113d is folded back onto the jacket. Next, the inner insulator 113b at the tip is removed to expose the core wire 113a having a predetermined length. A plug pin 115 serving as a central conductor of the coaxial plug 100 is attached to the exposed end of the core wire 113a, and the core wire 113a is bent into an L shape. On the other hand, inside the cylindrical portion 112 a of the plug outer conductor 112, the internal spring 116 bent so as to have a cylindrical shape and the insulating ring portion 114 including the ring body 114 a are accommodated on the internal spring 116. The internal spring 116 is formed by processing an elastic strip-like thin plate such as phosphor bronze, and a plurality of spring pieces 116b are formed by forming a plurality of notches 116a. A through hole 114b is formed in the ring main body 114a of the insulating ring portion 114.
[0006]
The core wire 113a to which the plug pin 115 of the coaxial cable 113 is attached is inserted from above the plug outer conductor 112 in this state. At this time, the core wire 113a on which the plug pin 115 is mounted is inserted into the through hole 114b, and the coaxial cable 113 in which the braided wire 113d is folded is placed on the cable crimping portion 112b. This state is the state shown in FIG. 16, and the cable caulking portion 112b includes a pair of caulking pieces facing each other. Therefore, as shown in FIG. 16, the coaxial cable 113 in which the braided wire 113 d is folded back on the jacket is fixed to the plug external conductor 112 by crimping a pair of crimping pieces in the illustrated direction. At this time, the position of the plug pin 115 is regulated by the through hole 114 b in the insulating ring portion 114, and is positioned on the substantially central axis of the cylindrical portion 112 a in the plug outer conductor 112. Next, the entire end portion of the coaxial cable 113 is molded while leaving about half of the cylindrical portion 112a. As a result, the coaxial plug 100 molded by the mold unit 111 is assembled as shown in FIG.
[0007]
[Problems to be solved by the invention]
Such a conventional coaxial plug 100 is attached to the end of a coaxial cable that connects a satellite broadcast tuner and a coaxial connector in a series unit provided on a wall surface or the like. By the way, recent BS (Broadcasting Satellite) broadcasting and CS (Communications Satellite) broadcasting are shifting from analog broadcasting to digital broadcasting, and digital broadcasting is gradually becoming mainstream. By the way, the frequency band of the CS-IF signal and the BS-IF signal is 1000 to 1895 MHz band in analog broadcasting, but the higher 2150 MHz band is standard in digital broadcasting. In the future, it is considered that use in the higher 2600 MHz band is required. As described above, since it is necessary to guide a high frequency IF signal to the satellite broadcast tuner, the coaxial plug needs to satisfy the requirement. Therefore, FIG. 19 shows the frequency characteristics of the insertion loss of the coaxial cable 113 to which the conventional coaxial plug 100 is attached, and FIG. 20 shows the frequency characteristics of the reflection loss.
[0008]
Referring to FIG. 19, it can be seen that the insertion loss increases from around 1000 MHz indicated by the mark 1 and that the insertion loss exceeds 1 dB at 1500 MHz or higher. It can also be seen that the reflection loss is reduced from around 1000 MHz indicated by the mark 1 and only a reflection loss of 10 dB or less is obtained above 1500 MHz. Because of such frequency characteristics, the conventional coaxial plug 100 cannot be used in the 2150 MHz band or the 2600 MHz band. The cause is considered as follows. Referring to FIG. 18, there is no ground conductor composed of the sheath portion 113c, the braided wire 113d, and the plug external conductor 112 in the portion A surrounded by the broken line around the core wire 113a, and the impedance in this portion A is a coaxial cable. The impedance is different from the characteristic impedance of 113. Then, since the impedances are different, it is considered that impedance mismatch occurs in this portion and the characteristics of insertion loss and reflection loss are deteriorated.
[0009]
In order to solve this problem, a coaxial plug 200 shown in FIG. 22 has been proposed. A coaxial plug 200 shown in FIG. 22 has a portion A shown in FIG. 18 covered with a metal shield box 117. That is, as shown in FIG. 21, a shield box 117 including a rectangular box-shaped main body 117a and a small box-shaped protrusion 117b protruding from the main body 117a covers the cable caulking portion 112b to the plug external conductor 112. I have to. The lower end of the shield box 117 is connected to the plug outer conductor 112.
The frequency characteristics of the insertion loss of the conventional coaxial plug 200 configured as described above are shown in FIG. 23, and the frequency characteristics of the reflection loss are shown in FIG. Referring to FIG. 23, it can be seen that the insertion loss is increased from around 1000 MHz indicated by the mark 1 and that the insertion loss exceeds 1 dB at 1500 MHz or higher, and the insertion loss characteristic is not improved. Further, the reflection loss is reduced to 10 dB in the vicinity of 1000 MHz indicated by the mark 1, and only a reflection loss of 10 dB or less is obtained at 1500 MHz or more, and it is understood that the reflection loss is not improved.
[0010]
Because of such frequency characteristics, the conventional coaxial plug 200 cannot be used in the 2150 MHz band or the 2600 MHz band. The cause is that even if the shield box 117 is covered, the distance between the shield box 117 and the core wire 113a is not uniform as shown by the arrow in FIG. This is because the impedance is different from the characteristic impedance of the coaxial cable 113.
[0011]
Accordingly, an object of the present invention is to provide a coaxial plug exhibiting good frequency characteristics.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, a coaxial plug according to the present invention is an L-shaped coaxial plug attached to the tip of a coaxial cable, and communicates with the cylindrical lower conductor having one end opened and the lower conductor. A plug outer conductor comprising a central conductor in which an insertion hole is formed, and an upper conductor in which a U-shaped groove communicating with the insertion hole of the central conductor is formed on the upper surface; and the lower portion of the plug outer conductor An insulating ring portion disposed at an upper portion in the conductor, and an inner spring disposed below the insulating ring portion and in contact with an inner peripheral surface of the lower conductor in the plug outer conductor, and the braided wire is exposed. The coaxial cable is placed in the U-shaped groove and is bent into an L shape with the sheath portion disposed inside the braided wire exposed, and the tip of the U-shaped groove is From the groove to the communication hole By being input, the internal insulating body located inside the sheath portion is inserted into the communicating hole Coaxial cable core wire Is disposed substantially on the central axis of the plug outer conductor, and Center Extending from the conductor into the lower conductor Above A plug pin attached to the tip of the core wire is disposed substantially on the central axis of the lower conductor, and the braided wire is drawn from the U-shaped groove and connected to the outer peripheral surface of the plug external conductor.
[0013]
In the coaxial plug according to the present invention, in the state where the coaxial cable is fixed to the plug outer conductor, the end portion of the coaxial cable and the outer conductor are molded except for the front portion of the lower conductor. It may be.
Furthermore, in the coaxial plug according to the present invention, a braided wire is formed by extending a pair of sandwiching pieces from the edge of the U-shaped groove so as to face each other, and is placed in the U-shaped groove. The exposed coaxial cable may be held and fixed by bending the pair of holding pieces.
[0014]
According to the present invention, the coaxial cable from which the braided wire is exposed is placed in the U-shaped groove formed in the upper portion of the plug outer conductor, and the L-shape is formed with the sheath portion exposed. Since it is bent and inserted into the insertion hole from the U-shaped groove of the plug outer conductor, the portion of the coaxial cable covered with the braided wire or the sheath portion can be lengthened and is not covered. Since the portion is coaxial with the plug outer conductor, the impedance in the coaxial plug and the impedance of the coaxial cable do not differ so much. As a result, it is possible to improve the frequency characteristics of the insertion loss in the coaxial cable with the coaxial plug attached to the tip, and to obtain a sufficient loss amount for the reflection loss.
Further, when the pair of sandwiching pieces are formed so as to face each other from the edge of the U-shaped groove, the coaxial cable can be securely fixed to the plug external conductor by the sandwiching pieces.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
An appearance of a first configuration example of the embodiment of the coaxial plug according to the present invention is shown in FIG. 1, and a sectional view showing the configuration is shown in FIG.
A coaxial plug 1 according to the present invention shown in FIG. 1 and FIG. 2 includes a molded part 11 made of resin and a metal plug outer conductor 12, and a coaxial cable 13 is drawn from the molded part 11. In the coaxial plug 1, a plug pin 15 is disposed substantially on the central axis in the plug external conductor 12 to have a coaxial configuration, and an internal spring 16 is disposed along the inner peripheral surface of the plug external conductor 12. The internal spring 16 is a spring for elastically holding the plug outer conductor 12 on the coaxial connector when the plug outer conductor 12 is inserted into the coaxial connector. Further, an insulating ring portion 14 is disposed on the inner upper portion of the plug outer conductor 12.
[0016]
Here, the detailed configuration of the plug outer conductor 12 is shown in FIG. 3, wherein FIG. 3 (a) is a front view of the plug outer conductor according to the present invention, FIG. 3 (b) is a plan view thereof, and FIG. ) Is a bottom view thereof, FIG. 3 (d) is a top view thereof, and FIG. 3 (e) is a sectional view thereof.
As shown in these figures, the metallic plug outer conductor 12 is inserted on the upper conductor 12a having a U-shaped groove 12d formed on the upper surface and the lower conductor of the upper conductor 12a and substantially on the central axis thereof. A center conductor 12b in which a hole 12e is formed, and a cylindrical lower conductor that is positioned below the center conductor 12b, has an insertion space 12f formed therein, and has a lower end surface as an opening 12h. Has been. Further, a ring-shaped locking portion 12g for preventing the internal spring 16 from falling off is formed at the periphery of the opening portion 12h so as to protrude inward. Further, the U-shaped groove 12d and the insertion space 12f communicate with each other through the insertion hole 12e.
[0017]
Returning to FIG. 1 and FIG. 2, the coaxial cable 13 with the coaxial plug 1 attached to one end includes a core wire 13 a, an internal insulator 13 b that holds the core wire 13 a along the substantially central axis of the coaxial cable 13, and A sheath portion 13c formed by winding an aluminum tape on the internal insulator 13b, a braided wire 13d disposed on the sheath 13c so as to cover the sheath portion 13c, and a jacket molded on the braided wire 13d It is composed of. As described above, the coaxial cable 13 has a double sheath structure including the sheath portion 13c and the braided wire 13d so that the high frequency characteristics are improved. The outer jacket at the tip of the coaxial cable 13 is removed, and this portion is placed in the U-shaped groove 12d. The exposed braided wire 13d is drawn from the opposite side through the U-shaped groove 12d and soldered to the outer peripheral surface of the plug outer conductor 12.
[0018]
The internal insulator 13b provided with the sheath portion 13c located inside the braided wire 13d is bent in an L shape and its tip is inserted into the insertion hole 12e from the U-shaped groove portion 12d. . The inner insulator 13b is removed at the tip of the coaxial cable 13 to expose the core wire 13a, and the plug pin 15 is fixed to the tip of the core wire 13a. In this case, since the internal insulator 13b is inserted into the insertion hole 12e and the position thereof is regulated, the plug pin 15 fixed to the tip of the core wire 13a is disposed on the substantially central axis of the plug external conductor 12. It becomes like this. The molded portion 11 is configured by molding except for the front portion of the lower conductor 12c in the plug external conductor 12.
[0019]
By inserting the plug outer conductor 12 in the coaxial plug 1 configured as described above into the coaxial connector from the opening 12h, the coaxial plug 1 can be fixed to the coaxial connector. At this time, the plug pin 15 is inserted into the central contact in the coaxial connector and electrically connected, and the plug outer conductor 12 is electrically connected to the connector main body of the coaxial connector via the internal spring 16. Become. In this coaxial plug 1, an internal insulator 13b bent in an L shape is inserted into the insertion hole 12e, and the core wire 13a in the coaxial cable 13 is surrounded by the sheath portion 13c via the internal insulator 13b. Or the metal plug outer conductor 12 is surrounded by the inner peripheral surface of the lower conductor 12c. Furthermore, as shown in FIG. 14, in the portion of the coaxial cable 13 bent into an L shape, the distance between the sheath portion 13c and the core wire 13a is substantially uniform. Thereby, even if the coaxial plug 1 is attached to the tip of the coaxial cable 13, the impedance in the coaxial plug 1 becomes substantially the same as that of the coaxial cable 13. Furthermore, by shortening the exposed portion L (see FIG. 14) of the core wire 13a of the coaxial cable 13, impedance mismatching is suppressed as much as possible.
[0020]
Therefore, FIG. 4 shows frequency characteristics of insertion loss of the coaxial plug 1 according to the present invention, and FIG. 5 shows frequency characteristics of reflection loss. Referring to FIG. 4, the insertion loss at 1000 MHz indicated by mark 1 and the insertion loss at 2150 MHz indicated by mark 4 are almost the same amount of insertion loss, and the maximum insertion loss in the frequency band up to 3000 MHz is It can be seen that it is only about 0.3 dB. In addition, the reflection loss at 1000 MHz indicated by the mark 1 is about 18 dB, and the reflection loss at 2150 MHz indicated by the mark 4 is also about 18 dB. It can be seen that a sufficient amount of reflection loss of about 17 dB is obtained as the minimum insertion loss in the frequency band up to 3000 MHz. Since the coaxial plug 1 according to the present invention has good frequency characteristics with good insertion loss and reflection loss, it can be used in the 2150 MHz band and the 2600 MHz band.
[0021]
Next, the assembly process of the coaxial plug 1 according to the present invention will be described with reference to FIGS. However, FIG. 6 is a figure which shows the manufacturing process of the coaxial cable 13 in the coaxial plug 1 concerning this invention, FIG. 7 is an exploded perspective view of the coaxial plug 1 concerning this invention, and FIG. 8 thru | or FIG. It is a figure which shows the assembly | attachment of the plug outer conductor 12 and the coaxial cable 13 in the coaxial plug 1 concerning.
To assemble the coaxial plug 1 according to the present invention, first, as shown in FIG. 6 (a), the jacket at the tip of the coaxial cable 13 is removed, and the exposed braided wire 13d is removed from the internal insulator 13b. To summarize. Next, the tip of the internal insulator 13b is removed to expose the core wire 13a having a predetermined length. Then, as shown in FIG. 6B, a plug pin 15 serving as the central conductor of the coaxial plug 1 is attached to the exposed end of the core wire 13a to obtain the state shown in FIG. 6C.
[0022]
On the other hand, the insulating ring portion 14 made of the ring body 14a is housed in the insertion space 12f of the lower conductor 12c in the plug outer conductor 12, and the inner spring 16 is bent below the insulating ring portion 14 so as to be cylindrical. Storing. The internal spring 16 is formed by processing a thin strip of elastic material such as phosphor bronze, and a plurality of spring pieces 16b are formed by forming a plurality of notches 16a. A through hole 14b is formed in the ring main body 14a of the insulating ring portion 14. Thus, the core wire 13a of the coaxial cable 13 is inserted into the insertion hole 12e communicating with the U-shaped groove 12d formed on the upper surface of the plug outer conductor 12 in which the insulating ring portion 14 and the internal spring 16 are accommodated. Insertion is started from the plug pin 15 attached.
[0023]
In this case, the internal insulator 13b provided with the sheath portion 13c of the coaxial cable 13 is inserted into the insertion hole 12e. Thereby, the core wire 13a is inserted into the through hole 14b in the insulating ring portion 14, and the position of the plug pin 15 attached to the tip of the core wire 13a is regulated by the through hole 14b. As a result, the plug pin 15 is disposed substantially on the central axis of the lower conductor 12c. This state is the state shown in the upper part of FIG. 8, and the coaxial cable 13 is bent in the extending direction of the U-shaped groove part 12d in the direction of the arrow shown in FIG. 8, and the U-shaped groove part 12d is shown in the lower part. It is assumed that the end of the coaxial cable 13 is housed inside. Thereby, the front-end | tip part of the gathered braided wire 13d comes to protrude from the U-shaped groove part 12d as shown in FIG.
[0024]
Next, the protruding end of the braided wire 13 d is bent downward and soldered to the outer peripheral surface of the plug outer conductor 12. Accordingly, the braided wire 13d is connected to the outer peripheral surface of the plug external conductor 12 by the soldering portion 13e as shown in FIGS. 10 (b), 10 (c), and 10 (d). Next, the end portion of the coaxial cable 13 is molded with the front portion of the lower conductor 12c in the plug outer conductor 12 being left. Thereby, as shown in FIG. 1 and FIG. 2, the coaxial plug 1 molded by the mold part 11 can be assembled.
[0025]
Next, a second configuration example of the embodiment of the coaxial plug according to the present invention will be described. In the configuration of the second coaxial plug according to the present invention, the configuration of the plug outer conductor is different, so the plug outer conductor will be mainly described.
FIG. 11 is a perspective view showing the configuration of the plug outer conductor 22 in the second coaxial plug according to the present invention. As shown in FIG. 11, the plug outer conductor 22 has an upper conductor 22a formed with a U-shaped groove 22d on the upper surface, an insertion hole (not shown) located on the lower portion of the upper conductor 22a and substantially on the central axis. The center conductor 22b is formed, and a cylindrical lower conductor having an insertion space (not shown) formed in the lower portion of the center conductor 22b and having an opening at the lower end surface. . Moreover, you may form in the periphery of an opening part so that the ring-shaped latching | locking part for preventing the internal spring 16 accommodated may fall off may protrude inside. Further, the U-shaped groove 22d and the insertion space communicate with each other through the insertion hole. A characteristic configuration of the plug outer conductor 22 is a configuration in which a pair of opposing sandwiching pieces 22e are formed from the upper edge of the U-shaped groove 22d.
[0026]
In the second coaxial plug according to the present invention, similarly to the first coaxial plug, the coaxial cable 13 processed as shown in FIG. 6 (c) is inserted into the insertion hole in the plug external conductor 22, FIG. 12 shows a state where the coaxial cable 13 is bent about 90 degrees in the extending direction of the U-shaped groove 22d. In this case, the front ends of the braided wires 13d that have been collected protrude from the U-shaped groove 22d. In this state, the pair of sandwiching pieces 22e are bent in the direction of the arrow shown in FIG. Thereby, the coaxial cable 13 in which the assembled braided wire 13d is located at the upper portion can be fixed in the U-shaped groove 22d by the pair of crimped clamping pieces 22e. Then, the braided wire 13d is connected to the plug external conductor 22 by bending the tip of the protruding braided wire 13d (not shown) downward and soldering to the outer peripheral surface of the plug external conductor 22. Next, the end portion of the coaxial cable 13 is molded while leaving the front portion of the lower conductor 22 c in the plug outer conductor 22. Thereby, the coaxial plug of the 2nd structure concerning this invention molded by the mold part can be assembled now. The appearance of the second configuration of the coaxial plug according to the present invention is as shown in FIG.
[0027]
Also in the coaxial plug of the second configuration according to the present invention, the inner insulator 13b bent in an L shape is inserted into the insertion hole, and the core wire 13a in the coaxial cable 13 is internally connected by the sheath portion 13c. It is surrounded by an insulator 13b or is surrounded by the inner peripheral surface of the lower conductor 22c of the metallic plug outer conductor 22. Furthermore, as shown in FIG. 14, in the portion of the coaxial cable 13 bent into an L shape, the distance between the sheath portion 13c and the core wire 13a is substantially uniform. As a result, even when the coaxial plug having the second configuration is attached to the tip of the coaxial cable 13, the impedance in the coaxial plug becomes substantially the same as the impedance of the coaxial cable 13. Furthermore, by shortening the exposed portion L of the core wire 13a of the coaxial cable 13, impedance mismatching is suppressed as much as possible. Therefore, the frequency characteristic of the insertion loss of the coaxial plug having the second configuration according to the present invention is the same as the characteristic shown in FIG. 4, and the frequency characteristic of the reflection loss is the same as the characteristic shown in FIG. Therefore, the coaxial plug having the second configuration according to the present invention can be used in the 2150 MHz band and the 2600 MHz band.
[0028]
【The invention's effect】
In the present invention, as described above, the coaxial cable with the braided wire exposed is placed in the U-shaped groove formed in the upper part of the plug outer conductor and bent into the L shape with the sheath portion exposed. Since the plug outer conductor is inserted into the insertion hole from the U-shaped groove, the portion covered with the braided wire or the sheath portion in the coaxial cable can be lengthened and the portion not covered Is made coaxial with the plug outer conductor, so that the impedance in the coaxial plug and the impedance of the coaxial cable are not so different. Furthermore, the impedance mismatch is suppressed as much as possible by shortening the exposed portion of the core wire in the coaxial cable. As a result, it is possible to improve the frequency characteristics of the insertion loss in the coaxial cable with the coaxial plug attached to the tip, and to obtain a sufficient loss amount for the reflection loss.
Further, when the pair of sandwiching pieces are formed so as to face each other from the edge of the U-shaped groove, the coaxial cable can be securely fixed to the plug external conductor by the sandwiching pieces.
[Brief description of the drawings]
FIG. 1 is a diagram showing an external appearance of a first configuration example of an embodiment of a coaxial plug according to the present invention.
FIG. 2 is a cross-sectional view of the coaxial plug according to the first embodiment of the present invention.
FIG. 3 is a diagram showing a detailed configuration of a plug outer conductor in the coaxial plug according to the first embodiment of the present invention.
FIG. 4 is a diagram illustrating frequency characteristics of insertion loss in the coaxial plug according to the first embodiment of the present invention.
FIG. 5 is a diagram showing frequency characteristics of reflection loss in the coaxial plug according to the first embodiment of the present invention.
FIG. 6 is a diagram illustrating a process of processing a coaxial cable in the coaxial plug according to the first embodiment of the present invention.
FIG. 7 is an exploded perspective view of the coaxial plug according to the first embodiment of the present invention.
FIG. 8 is a diagram showing the assembly of the coaxial cable and the plug outer conductor in the coaxial plug according to the first embodiment of the present invention.
FIG. 9 is a top view showing the assembly of the coaxial cable and the plug outer conductor in the coaxial plug according to the first embodiment of the present invention.
FIG. 10 is a diagram showing assembly of the coaxial cable and the plug outer conductor in the coaxial plug according to the first embodiment of the present invention.
FIG. 11 is a diagram showing a configuration of a plug external conductor in a coaxial plug according to a second embodiment of the present invention.
FIG. 12 is a diagram showing the assembly of the coaxial cable and the plug outer conductor in the coaxial plug according to the second embodiment of the present invention.
FIG. 13 is a diagram illustrating the assembly of the coaxial cable and the plug outer conductor in the coaxial plug according to the second embodiment of the present invention.
FIG. 14 is a diagram illustrating a bent state of the coaxial cable in the coaxial plug according to the embodiment of the present invention.
FIG. 15 is an exploded perspective view of a conventional coaxial plug.
FIG. 16 is a view showing a part of a conventional coaxial plug assembly process;
FIG. 17 is a view showing the appearance of a conventional coaxial plug.
FIG. 18 is a view showing a cross section of a conventional coaxial plug.
FIG. 19 is a diagram showing frequency characteristics of insertion loss of a conventional coaxial plug.
FIG. 20 is a diagram showing frequency characteristics of reflection loss of a conventional coaxial plug.
FIG. 21 is a diagram showing a configuration of another conventional coaxial plug.
FIG. 22 is a view showing a cross section of another conventional coaxial plug.
FIG. 23 is a diagram showing frequency characteristics of insertion loss of another conventional coaxial plug.
FIG. 24 is a diagram showing frequency characteristics of reflection loss of another conventional coaxial plug.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coaxial plug, 11 Mold part, 12 Plug outer conductor, 12a Upper conductor, 12b Center conductor, 12c Lower conductor, 12d U-shaped groove part, 12e Insertion hole, 12f Insertion space, 12g Locking part, 12h Opening part, 13 Coaxial Cable, 13a Core wire, 13b Internal insulator, 13c Sheath part, 13d Braided wire, 13e Soldered part, 14 Insulating ring part, 14a Ring body, 14b Through hole, 15 Plug pin, 16 Internal spring, 16a Notch, 16b Spring piece, 22 plug outer conductor, 22a upper conductor, 22b center conductor, 22c lower conductor, 22d U-shaped groove, 22e clamping piece, 100 coaxial plug, 111 mold part, 112 plug outer conductor, 112a cylindrical part, 112b cable caulking part, 113 Coaxial cable, 113a Core wire, 113b Internal insulator, 113 Sheath, 113d braided wire, 114 insulating ring portion, 114a ring body, 114b through hole 115 plug pins, 116 inside the spring, 116a cutout, 116 b spring pieces, 117 shield box, 117a body portion, 117b protrusion 200 coaxial plug

Claims (3)

There is an L-shaped coaxial plug attached to the tip of the coaxial cable,
A cylindrical lower conductor having one end opened, a central conductor formed with an insertion hole communicating with the lower conductor, and a U-shaped groove communicating with the insertion hole of the central conductor are formed on the upper surface. A plug outer conductor comprising an upper conductor,
An insulating ring portion disposed at an upper portion in the lower conductor of the plug outer conductor;
An inner spring that is in contact with the inner peripheral surface of the lower conductor in the plug outer conductor and is disposed under the insulating ring portion;
The coaxial cable with the braided wire exposed is placed in the U-shaped groove, and the sheath portion arranged inside the braided wire is bent into an L shape, Since the tip is inserted into the communication hole from the U-shaped groove, an internal insulator located inside the sheath portion is inserted into the communication hole, and the core wire of the coaxial cable is connected to the plug external conductor. causes arranged almost on the central axis, the plug pins from a central conductor is mounted to the distal end of the core wire that extends into the lower conductor is arranged substantially on the central axis of the lower conductor, the braided wire is the U A coaxial plug, wherein the coaxial plug is drawn out of a letter-shaped groove and connected to the outer peripheral surface of the plug outer conductor. The end portion of the coaxial cable and the outer conductor are molded with the front portion of the lower conductor remaining in a state where the coaxial cable is fixed to the plug outer conductor. Coaxial plug. A coaxial cable is formed by extending a pair of sandwiching pieces so as to face each other from the edge of the U-shaped groove, and exposing the braided wire placed in the U-shaped groove. The coaxial plug according to claim 1, wherein the clamping piece is clamped and fixed by bending.

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