JPH1022003A - High frequency contact plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable connection of conductors with various diameters. SOLUTION: A first central contact 2 has a pair of extended parts of V-shaped cross section, and a core conductor is inserted into the extended parts and connected. The first central contact 2 is enclosed in a first spacer 4 made of a resin and is fixed inside a shell 1, while a second central contact 3 having a slit in which the flat part of the first central contact 1 is held is fixed inside the shell 1 by means of a second spacer 5 made of a resin. The diameter of the second central contact 3 can be selected freely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency plug used as an input / output terminal for transmitting and receiving a high frequency signal.

[0002]

2. Description of the Related Art A high frequency signal in a CATV or the like is generally transmitted by a coaxial cable, but a distributor, a duplexer or other devices are inserted in the middle of a transmission line. In this type of equipment, a high-frequency plug is used as an input / output terminal for connecting to a coaxial cable. FIG. 9 shows an example of the configuration of a conventional high-frequency plug. As shown in FIG. 9, the high frequency plug has a shell 101 having a screw and a flange 105 formed on the outer periphery, a center contact 102 in the shell 101, and the center contact 102 held substantially at the center of the shell 101. And a first spacer 103 and a second spacer 104.

The detailed structure of the center contact 102 is shown in FIG.
As shown in FIG. 2, the center contact 102 has a rod-like shape, and has a leading end portion formed with a slot portion 110 into which the core of the coaxial cable is inserted and held, and a core insertion hole 111. A flange 112 is formed in the middle of the center contact 102. And the center contact 10
2 to the flange 112 are inserted into the first spacer 103. The first spacer 103 is made of an insulating material and has a substantially cylindrical shape. The remaining part of the center contact 102 is inserted into the second spacer 104 up to the middle. The second spacer 104 is made of an insulating material, and has a substantially cylindrical shape. Note that the flange 112 formed on the center contact 102 is
This is to prevent the center contact 102 held by the third and second spacers 104 from moving in the axial direction.

[0004]

In the above-mentioned plug for high frequency, the core wire insertion hole 1 formed in the center contact 102 is provided.
Since the core wire of the coaxial cable is inserted and connected to 11, only the core wire of the coaxial cable having a diameter corresponding to the diameter can be connected to the core wire insertion hole 111. The high frequency plug was sometimes destroyed. That is, as is well known, the diameter of the coaxial cable increases as the propagation loss per unit distance decreases, and as the outer diameter of the shield increases, the diameter of the core wire also increases. Also, the diameter of the core wire varies depending on the characteristic impedance of the coaxial cable. As described above, despite the fact that coaxial cables having core wires of various diameters exist, the conventional high-frequency plug can only connect a coaxial cable of a specific diameter core wire. There was a point.

To solve this problem, it is conceivable to convert the outer diameter of the core wire of the coaxial cable into a constant diameter. That is, the other end of the connection pin having a pin of a specific diameter at one end is crimped or soldered to the core wire of the coaxial cable to obtain an apparent core wire having a constant diameter. Then, by inserting this pin into the core wire insertion hole 111 and connecting it, it becomes possible to connect coaxial cables of various diameters to the high frequency plug as shown in FIG. However, this method has a problem in that it takes time and effort to connect the connection pins for changing the diameter.

Further, by providing a high-frequency connector on the lid and providing a circuit board on the main body, the lid is fitted on and fixed to the main body, so that the output portion of the high-frequency connector is connected to the circuit. Devices that are connected to a substrate are known. In such a device, the output portion of the high-frequency plug has a rod-like shape, and when the lid is fitted, the rod-like body is clamped by a clamping piece provided on the circuit board. . The output part of the high-frequency plug used in such equipment includes:
Since a large stress is applied when being clamped, the rod-shaped body needs to have a somewhat large diameter. However, the diameter of the center contact of the conventional high-frequency plug has a diameter corresponding to the diameter of the core wire inserted into the center contact, so that it may not be possible to increase the diameter in some cases.

Therefore, in order to solve such a problem, the present invention can connect coaxial cables having core wires of various diameters, and make the signal output portion a rod-like body having an arbitrary diameter. It is an object of the present invention to provide a high-frequency plug that can be used.

[0008]

In order to achieve the above object, a high-frequency plug according to the present invention comprises a set of contacts having a V-shape in cross section extending from a base having a core guide portion formed at the tip. A first center contact including a portion, a flat portion formed on the opposite side to the contact portion from the base portion, and the first center contact is inserted and held, and is inserted into a tip corresponding to the core wire guide portion. A first insulating cylindrical body having a guide portion formed thereon
A spacer, a rod-shaped second center contact in which a slit for holding the flat plate portion of the first center contact is formed at the distal end, and an insertion hole through which the second center contact is inserted are formed substantially in the center. An insulating cylindrical second spacer, the first center contact, the first spacer,
A cylindrical storage portion that is inserted and held in a state where the second center contact and the second spacer are mutually coupled;
And a metal shell having a screw portion on the outer peripheral surface.

Further, in the high frequency plug, a conical guide portion is formed at a tip of the second center contact, and when the flat plate portion is inserted into the slit, the guide portion is used to form the second central contact. The flat portion is guided to the center of the center contact. Further, in the high-frequency plug, a head having a large diameter is formed at a tip of the second center contact, and a fitting portion into which the head is fitted is formed at a tip of the second spacer. The width of the slit is regulated by fitting the head to the fitting portion.

According to the present invention, since the set of contact portions extending from the base in a V-shape in cross section is a portion to which the core wire of the coaxial cable is inserted and connected, a contact portion having elasticity is provided. Expands according to the diameter of the inserted core wire. Therefore, the high-frequency connector of the present invention can connect coaxial cables of various diameters. In addition, since the first center contact, into which the core wire of the coaxial cable is inserted and connected, is held between the slits of the second center contact of the rod, any diameter that requires the diameter of the rod of the output unit can be used. Will be able to

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view of a configuration of an embodiment of a high-frequency connector according to the present invention. In FIG. 1, reference numeral 1 denotes a shell of a high-frequency plug. Each component constituting the high-frequency plug is stored in the shell 1. Reference numeral 2 denotes a first center contact into which the core wire of the coaxial cable is inserted and connected. Reference numeral 3 denotes a rod-shaped second center contact having a slit connected to the first center contact 2. Reference numeral 4 stores and holds the first center contact 2. A cylindrical first spacer made of a resin having a low dielectric constant;
Reference numeral 5 denotes a cylindrical second spacer made of a resin having a low dielectric constant and holding the inserted second center contact 3.

The components constituting the high frequency plug of the present invention are configured as shown in FIG. 1. First, the first center contact 2 is housed in the first spacer 4, and then the first spacer 4 The flat portion of the first center contact 2 projecting rearward is inserted into a slit formed at the tip of the second center contact 3 and sandwiched. Next, the second spacer 5 is inserted from the rear of the second center contact 3, and the first center contact 2, the second center contact 3, the first spacer 4, and the second spacer 5 joined in this manner are connected to the shell 1. Insert from behind. By crimping the rear end of the shell 1, a high-frequency plug can be assembled. FIG. 2 shows a half sectional view of the high frequency plug thus assembled.

As shown in FIG. 2, the high-frequency plug according to the present invention comprises a first center contact 2 and a second
The central contact 3 is located. In addition, the first spacer 4 in which the first center contact 2 is housed has its cylindrical outer periphery not entirely in contact with the inner surface of the shell 1, but only a part thereof. this is,
This is because the thickness of the first spacer 4 is set to the minimum necessary thickness to improve the high frequency characteristics of the high frequency plug. A hexagonal flange portion 6 is formed on the outer periphery of the shell 1, and a first screw portion 1-1 is formed on the distal end side from the flange portion 6 and a second screw portion 1-2 is formed on the rear end side. Have been. 1st screw part 1-1
, A male coaxial plug connected to the end of the coaxial cable is screwed, and the second screw portion 1-2 is screwed into a screw portion formed on a housing of a device to which the high-frequency plug is attached. .

The O-ring 7 is connected to the flange 6 and the second screw 1.
-2 for waterproofing when the high-frequency plug is attached to the housing. Further, the rear end of the shell 1 is caulked as shown, so that the second spacer 5 and the first spacer 4 in contact with the second spacer 5 do not fall out of the inside of the shell 1. Is fixed inside. As shown in FIG. 3, a head 3-3 having a large diameter is formed at the tip of the second center contact 3, and this head 3-3 is fitted to the fitting portion of the second spacer 5. Thereby, the second center contact 3 and the first center contact 2 coupled to the second center contact 3
Is fixed to substantially the center of the shell 1.

As shown in FIG. 3, a guide portion 3-2 which is notched in a conical shape is formed on a head portion 3-3 formed at the tip of the second center contact. 2
Communicates with a slit 3-1 formed at the tip.
Thereby, when the flat plate portion 2-1 formed at the rear end of the first center contact 2 shown in detail in FIG. Then, the flat portion 2-1 is guided by the guide portion 3-2 substantially at the center of the second center contact 3.

The detailed structure of the first center contact 2 is shown in FIG.
(A), (b), (c) and (d). FIG. 4 (a)
FIG. 3B is a front view of the first center contact 2, and FIG.
FIG. 3C is a top view, FIG. 3C is a cross-sectional view of the extending portion 2-4, and FIG. 3D is a left side view. The first center contact 2 is a set of extending portions 2- extending from the base 2-3 toward the distal end.
4 and a flat plate part 2-1 formed on the rear end side from the base part 2-3. The cross section of the extending portion 2-4 is bent in a U-shape as shown in FIG. 4C, and an expanded core wire guide portion 2-2 is formed at the tip thereof. I have. Since the cross section of the extending portion 2-4 is formed in a U-shape, this portion is less likely to be bent, and the holding force for sufficiently holding the core of the coaxial cable can be increased even when the plate thickness is reduced. The core wire guide portion 2-2 is a guide portion for facilitating insertion of the core wire of the coaxial cable.

As described above, since the extending portion 2-4 of the first center contact 2 is formed, the extending portion 2-4 is broken even if core wires having various diameters are inserted into the extending portion 2-4. The degree of opening of the extending portion 2-4 changes according to the diameter without being performed. Therefore, the high-frequency plug of the present invention,
Coaxial cables of various diameters can be connected. Next, the detailed configuration of the second spacer 5 is shown in FIG. 5. The second spacer 5 is formed with an insertion hole 5-2 through which the second center contact 3 is inserted so as to pass through the center. Further, a fitting portion 5-1 having a large diameter is formed at the tip of the insertion hole 5-2. The head portion 3-3 of the second center contact 3 shown in FIG. 3 is fitted into the fitting portion 5-1. When the slit 3-1 becomes too wide due to the fitting, the slit width is reduced. Can be regulated. Therefore,
The slit 3-1 of the second center contact 3 can keep the flat plate portion 2-1 of the first center contact 2 with a sufficiently strong holding force. In order to easily fit the head part 3-3 and the fitting part 5-1, it is preferable to perform chamfering on any one. (FIG. 5 shows an example of chamfering.)

Next, FIGS. 6A and 6B show the detailed structure of the first spacer 4 in a state where the first center contact 2 is housed. FIG. 6A is a front view of the first center contact 2, and FIG. 6B is a left side view. As shown in these figures, an accommodation hole 4-2 for accommodating the first center contact 2 is formed at the center of the first spacer 4, and furthermore,
At the tip of the first spacer 4, an insertion guide part 4-1 for guiding the core wire of the coaxial cable easily is formed. Furthermore, the extension 2-4 of the first center contact 2
The cylindrical wall in the opening direction is partially notched. The rear end of the first spacer 4 is formed with a plurality of slits so as to have elasticity, and a contact piece 4-3 for contacting the inner surface of the shell 1 is formed on the outer periphery thereof. As described above, the first spacer 4 is designed so as to have a minimum necessary thickness, so that the influence of the first spacer 4 on the high-frequency characteristics can be minimized.

FIG. 7 shows a detailed structure of the shell 1. A hexagonal flange 6 is formed on the outer periphery of the shell 1, and a first screw 1- 1 has a second threaded portion 1-2 formed on the rear end side. A male coaxial plug connected to the end of the coaxial cable is screwed into the first screw portion 1-1, and a second screw portion 1-2 is formed on the housing of the device to which the high-frequency plug is attached. And the high frequency plug is attached to the housing. The shell 1 is formed in a cylindrical shape, and the inside thereof has a first center contact 2, a second center contact 3, a first spacer 4,
The storage section 1-3 stores the second spacer 5.

The high frequency plug thus configured is attached to each side of the lid 12 of the case shown in FIG. 8A, for example. This attachment is performed by screwing the second screw portion 1-2 of the shell 1 to the lid portion 1-2. The second center contact 3, which is the output portion of the high frequency plug 10, is connected to the case body 1 as shown in the figure.
1 is held by a core holding piece 14 provided on a substrate 13 in which an electronic circuit built in is incorporated. This second
The center contact 3 is held between the core wire holding pieces 14 by the lid 1.
2 is fitted to the case body 11. That is, the electrical connection between the high-frequency plug 10 and the substrate 13 is performed by fitting the lid 12 to the case body 11. One of the high-frequency plugs 10 provided on both sides of the case is an input terminal, and the other is an output terminal.

The details of the core wire holding piece 14 are shown in FIGS.
Shown in FIG. 8B is a front view of the core wire holding piece 14, and FIG. 8C is a right side view. As shown in these figures, the core wire holding piece 14 is made of a pair of elastic plate members such as phosphor bronze extended from the base 14-3, and has a core wire guide portion 14-1 for guiding the second center contact 3 thereon. Is formed, and a core wire fitting portion 14-2 sandwiching the second center contact 3 is formed thereunder. On the opposite side from the base 14-3, an attachment portion 14-4 for attaching the core wire holding piece 14 to the substrate 13 is formed by extension.

The slit 3 of the second center contact 3
The slit width of -1 is, for example, about 0.2 mm,
The thickness of the flat portion 2-1 of the first center contact 2 is about 0.2
5 mm. The diameter of the second center contact 3 is
The diameter is about 1.8 mm, but is not limited to this, and can be any diameter. Further, the first center contact 3
Is about 16 mm, the outer diameter of a set of extending portions 2-4 is about 2 mm, and the plate thickness is about 0.25 mm, the diameter of the core wire of the coaxial cable that can be inserted is 0.8 mm to
It can be about 1.5 mm, and it becomes possible to insert core wires of various diameters.

[0023]

As described above, according to the present invention, a pair of contact portions extending in a V-shape in cross section extending from the base portion is a portion to which the core wire of the coaxial cable is inserted and connected. The portion expands according to the diameter of the inserted core wire. Therefore, the high-frequency connector of the present invention can connect coaxial cables of various diameters. Further, the first contact, into which the core wire of the coaxial cable is inserted and connected, is held between the slits of the second center contact of the rod, so that the diameter of the rod of the output portion is set to an arbitrary required diameter. Will be able to do it.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a configuration of an embodiment of a high-frequency plug according to the present invention.

FIG. 2 is a half sectional view showing one configuration of an embodiment of the high frequency plug of the present invention.

FIG. 3 is a diagram showing a detailed configuration of a second center contact in the high frequency plug of the present invention.

FIG. 4 is a view showing a detailed configuration of a first center contact in the high frequency plug of the present invention.

FIG. 5 is a view showing a detailed configuration of a second spacer in the high-frequency plug of the present invention.

FIG. 6 is a diagram showing a detailed configuration of a first spacer in the high-frequency plug of the present invention.

FIG. 7 is a diagram showing a detailed configuration of a shell in the high-frequency plug of the present invention.

FIG. 8 is a view showing a state in which the high-frequency plug of the present invention is attached to a case.

FIG. 9 is a view showing a configuration of a conventional high-frequency plug.

FIG. 10 is a view showing a configuration of a center contact of a conventional high frequency plug.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shell 1-1 1st thread part 1-2 2nd thread part 2 1st center contact 2-1 Flat plate part 2-2 Core wire guide part 2-3 Base part 2-4 Extension part 3 2nd center contact 3-1 Slit 3-2 Guide part 3-3 Head 4 First spacer 4-1 Insert guide part 4-2 Storage hole 4-3 Contact piece 5 Second spacer 5-1 Fitting part 5-2 Insertion hole 6 Flange part 7 O Ring 10 High frequency plug 11 Case body 12 Lid 13 Substrate 14 Core wire holding piece

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[Procedure amendment]

[Submission date] May 7, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

Claims (3)

[Claims] A contact portion extending from a base having a core wire guide portion formed at a tip thereof, and a flat portion formed on the opposite side of the contact portion from the base. A first center contact; an insulating tubular first spacer having an insertion guide portion formed at an end corresponding to the core wire guide portion while the first center contact is inserted and held; and the first center contact. A rod-shaped second center contact having a slit formed at the tip end thereof for holding the flat plate portion, and an insulating cylindrical second spacer formed substantially at the center of an insertion hole through which the second center contact is inserted. A cylindrical storage portion that is inserted and held in a state where the first center contact, the first spacer, the second center contact, and the second spacer are connected to each other; Made of metal with High-frequency plug connector, characterized in that it consists of a shell. 2. A conical guide portion is formed at a tip of the second center contact, and when the flat plate portion is inserted into the slit, the guide portion causes the flat plate to be centered on the second center contact. A high-frequency connector characterized by being guided. 3. A head having a large diameter is formed at a tip of the second center contact, and a fitting portion to which the head is fitted is formed at a tip of the second spacer. 2. The high-frequency plug according to claim 1, wherein the width of the slit is regulated by fitting into the fitting portion.