JP4690927B2 - Coaxial plug - Google Patents

Description

The present invention relates to a coaxial plug mainly used in a television reception system, and more specifically, a coaxial plug that can be easily connected to an F-type receptacle to be connected, and that is difficult to pull out against force in the pulling direction. Related to the structure.

Conventionally, in a coaxial plug that is attached to the end of a coaxial cable and has a contact pin arranged at the center of a cylindrical member, it is screwed with the tip of a male screw formed on the outer peripheral surface of an F-type receptacle to be connected. A plurality of female screw portions are provided inside the cylindrical member, and in addition, a plurality of female screw portions are arranged on the inner surface of the cylindrical member between the female screw portion and the opening of the cylindrical member in the circumferential direction of the cylindrical member. The one provided with a leaf spring has been proposed. The coaxial plug is connected by engaging the tip opening of the cylindrical member with the F-type receptacle and pushing the male screw until the tip of the male screw comes into contact with the female screw formed on the inner surface of the cylindrical member. Then, the female screw portion is screwed into the male screw of the F-type receptacle. Further, serrations are formed as operation means on the outer surface of the cylindrical member, facilitating the rotation of the cylindrical member when connected to the F-type receptacle.
(For example, see Patent Document 1)

JP 2004-259462 A

However, in order to connect the cylindrical member to the F-type receptacle, it is necessary to grasp and push the operating means with a fingertip. At this time, for example, if the operating means is formed integrally with the cylindrical member, the cylindrical member is formed of a metal material, so that it is possible that the fingertip is burdened by this connection work and the fingertip becomes painful. . In particular, when the F-type receptacle to be connected is a wall-embedded non-projecting type provided in a cylindrical space, the front portion of the cylindrical member is inserted into the space when the coaxial plug is pushed in. Therefore, even if the operating means is extended in the axial direction and its area is increased, it is difficult to apply force because only the rear part of the operating means can be gripped, and the burden on the fingertip is increased. was there.
In addition, if the operation means formed in the shape of a narrow bowl radially outward is provided behind the cylindrical member, if it is strongly picked, it will bite into the fingertip, increasing the burden on the fingertip. Therefore, it is conceivable to extend the operating means by extending the operating means rearward. However, in this case, there is a problem that the dimension in the axial direction of the plug increases. Therefore, it is conceivable to increase the moment of force applied to the cylindrical member by increasing the peripheral diameter of the operating means. In either case, however, the weight of the product becomes heavier due to the larger outer shape of the plug. It may be necessary to review the packaging material, such as increasing the size or changing the material, and there is a problem that the product cost increases.

On the other hand, a method is conceivable in which the operating means is formed of a synthetic resin material and is fixed to the cylindrical member. In this case, if a soft synthetic resin material having elasticity is used as the operating means, the operating means will be easier to handle and the peripheral diameter will be larger than that of the cylindrical member. In order not to increase the dimensions, the operating means cannot be widened, so it is difficult to tighten it tightly. Further, if you try to strengthen the connection, the fingertips are burdensome and the fingertips become painful. There wasn't. Also, if a cylindrical member is extended to the rear of the operating means and the outer periphery of this extended part is made into a polygon such as a hexagon, for example, to form a contact allowance for the tool, the tool can be used for tightening. In this case, the axial dimension of the coaxial plug becomes longer, which causes the same problem as described above.

By the way, while digital terrestrial broadcasting has advanced rapidly, terrestrial analog broadcast tuners and digital terrestrial broadcast tuners have been built into personal computers, and the use of televisions on personal computer monitors has increased. In addition, small and lightweight LCD TVs have become widespread, and personal computers and LCD TVs can be freely carried and watched at the necessary place when necessary. Therefore, it is desirable that the cable for connecting the TV or notebook computer and the TV terminal can be easily and reliably connected. On the other hand, LCD TVs with a large screen size are also popular. In this case, large LCD TVs cannot be carried freely, so they are installed on a TV stand in the vicinity of the wall where TV terminals are installed. Will be. In other words, it is difficult to install and remove the cable connecting the TV and the TV terminal without moving the TV stand or the like. Therefore, once the cable is connected, it is desirable to maintain the connection without loosening for many years.
In other words, in recent years, coaxial cables with plugs are a product that combines ease of use and ease of handling that can be easily and easily connected so that users can flexibly handle the reception environment. In addition to being important, it is also required to be a product that can handle usage conditions that require high reliability and durability. In addition, when used for digital broadcast reception, symptoms peculiar to digital broadcasting, such as block noise occurring in the video, freezing of the video, or loss of video in severe cases, can occur due to external interference. Needless to say, the product must have good high-frequency characteristics, and it must be configured to support a wide range of applications.
Therefore, in this application, it was made to solve these problems.
The purpose is to provide a coaxial plug that can be easily connected.
Another object is to provide a coaxial plug that is easy to connect even if it is small.
Another object is to provide a low cost coaxial plug.
Another object is to provide a coaxial plug having excellent adhesion to the F-type receptacle to be connected.
Another object is to provide a coaxial plug that is difficult to pull out even when the coaxial cable is pulled.
Another object is to provide a coaxial plug with excellent high frequency characteristics.
Another object is to provide a coaxial plug with excellent immunity even if the connection is simple.
Another object is to provide a coaxial plug that can be easily and firmly attached to a general connector seat.
Another object is to provide a cable with a coaxial plug having the above characteristics.

In order to solve the above-described problems, the invention of claim 1 includes at least a connector main body to which a coaxial cable is attached, and a contact pin of a coaxial plug disposed in the connector main body and connected to a central conductor of the coaxial cable. A holding body that is electrically insulated and held at the center position of the inner periphery of the connector body, a connection means for connecting to a connection object provided in front of the connector body, and fitted on the outer periphery of the connection means And a coaxial plug for mounting on the end of the coaxial cable, comprising: a cylindrical operating means for rotating the connecting means;
The connecting means comprises a cylindrical base for pivotally attaching to the front outer periphery of the connector body, and a cylindrical receptacle for connecting a connection object,
The cylindrical base portion of the connecting means is formed with a two-plane width composed of a pair of plane portions arranged in parallel to the opposing positions on the outer periphery,
It said operating means, and configured to so that to have a person with hole in which the flat portion is penetrated to expose.

According to a second aspect of the present invention, in the coaxial plug according to the first aspect, the cylindrical receptacle portion of the connection means has an expansibility for inserting an F-type receptacle to be connected into the inner periphery, and A female screw portion that is screwed with a male screw formed at the tip of the F-type receptacle is formed.

According to a third aspect of the present invention, in the coaxial plug according to any one of the first or second aspects, the cylindrical operation means has a non-slip unevenness on an outer peripheral surface.

According to a fourth aspect of the present invention, in the coaxial plug according to any one of the first to third aspects, a pressing finger hook projecting radially outward is formed at a front end portion of the cylindrical operating means. It is comprised so that it may have.

According to a fifth aspect of the present invention, in the coaxial plug according to any one of the first to fourth aspects, a step is provided at an outer peripheral edge portion at a front end of the connector body, and the step includes a connector body. Is formed in a ring shape concentrically with the central axis, and the circumference is a size held in an annular recess formed between the inner circumference of the cylindrical base and the step, and the dimension in the direction of the central axis is A contact ring made of a conductive elastic material is formed to be slightly larger than the step and protrude from the tip of the connector body.

According to the first aspect of the present invention, at least the connector main body for mounting the coaxial cable and the contact pin of the coaxial plug disposed in the connector main body and connected to the central conductor of the coaxial cable are electrically insulated. A holding body held at the center of the inner periphery of the connector body, connection means for connecting to a connection object provided in front of the connector body, and rotating the connection means fitted on the outer periphery of the connection means In the coaxial plug to be attached to the end of the coaxial cable, comprising a cylindrical operation means for operation,
The connecting means comprises a cylindrical base for pivotally attaching to the front outer periphery of the connector body, and a cylindrical receptacle for connecting a connection object,
The cylindrical base portion of the connecting means is formed with a two-plane width composed of a pair of plane portions arranged in parallel to the opposing positions on the outer periphery,
The operating means has an abutting hole penetrating in a shape corresponding to the planar portion at a position facing the planar portion, and an outer periphery in a planar direction perpendicular to at least the axis of the cylindrical operating means. Since the opening end surface formed in is substantially coplanar with the plane portion or slightly on the axis side,
A tool can be applied directly to the flat part of the connection means via the contact hole of the cylindrical operation means, and tightening is possible because even if a cylindrical operation means is provided, the tightening performance of the connection means is not impaired. can do. In addition, the cylindrical operating means as the rotary operating section provided in the connecting means and the two-surface width position are configured so that they overlap the substantially same position behind the cylindrical receiving portion, so that the tool allowance can be operated. There is no need to make it rearward of the means, and the plug can be reduced in size without increasing the length in the front-rear direction. In other words, for example, even if the F-type receptacle to be connected is a non-projecting type that is often found on TV terminals, the connection work can be easily performed by any method, whether it is a fingertip or a tool. It can be held firmly so that it does not fall out. In addition, because of the small size, the projecting dimension from the wall surface to which the TV terminal is attached can be shortened.

According to a second aspect of the present invention, in the coaxial plug according to the first aspect, the cylindrical receptacle portion of the connection means has an expandability for inserting an F-type receptacle to be connected into the inner periphery. In addition, since the female screw portion that is screwed with the male screw formed at the tip portion of the F-type receptacle is formed,
The F-type receptacle to be connected is inserted by sliding until it abuts on the female thread, and after the abutment, the connection is completed by screwing the female thread on the tip of the F-type receptacle. Work is easy and time saving is possible. Moreover, it is difficult to pull out and has high reliability.

According to the invention of claim 3, in the coaxial plug according to claim 1 or 2, the cylindrical operation means is configured to have a non-slip unevenness on the outer peripheral surface.
The anti-slip action facilitates the rotation operation at the fingertip.

According to a fourth aspect of the present invention, in the coaxial plug according to any one of the first to third aspects, the front end portion of the cylindrical operation means projects radially outwardly. Since it is configured to have
It becomes easy to apply a pressing force by the fingertip to the connection means, and the connection work to the F-type receptacle to be connected becomes easier and smoother. When this F-type receptacle is connected to a non-protruding type embedded in a cylindrical space often found in TV terminals, the finger hook is placed close to the panel closing the TV terminal. Because it is less likely to protrude from the panel, the finger hook does not get in the way after connection.

According to a fifth aspect of the present invention, in the coaxial plug according to any one of the first to fourth aspects, a step is provided at the outer peripheral edge of the front end of the connector body. It is formed in a ring shape that forms a concentric circle with the central axis of the connector body, and the circumference is a size that is held in an annular recess formed between the inner circumference of the cylindrical base and the step, Since the dimensions are configured to include a contact ring made of a conductive elastic material that is slightly larger than the step and protrudes forward from the tip of the connector body,
When the F-type receptacle to be connected is connected to the coaxial plug, the electrical connection between the front end of the connector body and the front end of the connector main body, which varies depending on the processing or manufacturing method of the outer conductor of the F-type receptacle, is stabilized. High frequency characteristics and immunity characteristics can be maintained well.
Also, when the coaxial plug is configured to be connected to the F-type receptacle by screwing, the contact ring is formed so as to slightly protrude in the central axis direction, so that the front end of the F-type receptacle is contacted first. The contact ring is elastically deformed and crushed by abutting the ring and further screwing. However, since the end of the F-type receptacle is then brought into contact with the front end of the connector body, the screwing is completed, so that the contact ring is not crushed more than necessary. That is, since the load in the rotational direction due to screwing is not applied to the contact ring more than necessary, the contact ring will not be cut by friction, and high reliability that can be repeated even when the coaxial plug is repeatedly attached and detached. In addition, good electrical characteristics can be maintained even after repeated mounting and dismounting.

Hereinafter, an example of an embodiment embodying the present invention will be described in detail with reference to the drawings.
FIG. 1 is an explanatory view of a cable using the coaxial plug (hereinafter referred to as a coaxial cable with a plug) as a first embodiment of the coaxial plug according to the present invention, and is a sectional view with a part broken away. . FIG. 2 is an explanatory view of a connector main body and a holding body constituting a coaxial cable with a plug, and shows a partial cross section. FIG. 3 is an explanatory view showing a coaxial cable cover constituting the coaxial cable with a plug. 4A and 4B are explanatory views showing a partial cross section of the connecting means constituting the coaxial cable with a plug, wherein FIG. 4A is a top view and FIG. 4B is a side view. FIGS. 5A and 5B are explanatory views showing a partial cross section of the cylindrical operation means provided in the connection means constituting the coaxial cable with a plug, wherein FIG. 5A is a top view and FIG. 5B is a side view. 6 is an explanatory view showing a state in which the cylindrical operation means shown in FIG. 5 is attached to the connection means shown in FIG. 4, wherein (a) is a top view and (b) is a side view. FIG. 7 is an explanatory view of connection means provided with different embodiments of the cylindrical operation means, wherein (a) is a top view and (b) is a side view. 8A and 8B are explanatory diagrams when the plug shown in FIG. 7 is connected to the television terminal. FIG. 8A shows a state before connection, and FIG. 8B shows a state after connection. FIG. 9 is an explanatory view of another embodiment of a connector main body constituting a coaxial cable with a plug, and (a) shows a partial cross section. (B) The front view and side view of a contact ring are shown. (C) is a partial cross-sectional view in which a contact ring is mounted on the connector body. FIG. 10 is an explanatory view of a coaxial plug of a different embodiment, and shows a partial cross section. FIG. 11 is an explanatory view of a cross section in which a part of the coaxial cable with a plug according to the second embodiment of the present invention is broken. 10 will be described with reference to the arrangement state in FIG. 1 when the left and right and vertical directions are shown in the following description. Further, when described as front, it indicates the right direction in the state of FIG. 1, and when described as rear, it indicates the left direction in the state of FIG.

First, a first embodiment using the coaxial plug of the present invention will be described with reference to FIGS. 1 shown in the figure is a coaxial cable with a plug, which is composed of a coaxial cable 3 and a coaxial plug 2 connected to one end of the coaxial cable 3. It should be noted that the other end of the coaxial cable not shown in the figure may be provided with the coaxial plug 2 similarly to the one end side, and is not limited to the embodiment.
The coaxial cable 3 used in the embodiment of the present invention includes a center conductor 31, an inner insulator 32 provided so as to be held around the center conductor 31, and a braid and protection as an outer conductor 33. The coating 34 is configured to be arranged concentrically.

One end of the coaxial cable 3 is subjected to predetermined processing, and the center conductor 31 is exposed by a predetermined length, and the contact pin 8 is fixed to the end of the center conductor 31 by a fixing method such as soldering or caulking. When the assembly is thus completed, the connector main body 20 constituting the coaxial plug 2 is attached to the coaxial cable 3.

Here, details of the connector main body 20 in the first embodiment of the present invention will be described. As well shown in FIG. 2, in the embodiment of the present invention, the connector body 20 is formed by processing a conductive material such as a metal material, and is inserted between the inner insulator 32 and the braid 33 of the coaxial cable 3 at the rear. A cylindrical insertion portion 21 for electrically connecting the connector body 20 and the braid 33, and a cylindrical portion 25 having a larger diameter than the cylindrical insertion portion provided in front of the cylindrical insertion portion 21. It is composed of The cylindrical portion 25 is formed integrally with the cylindrical insertion portion 21 via a step portion 22 and is formed separately from the cylindrical connection body 23, and the cylindrical connection body 23 is formed of a cylindrical fixing body 24 fixed to the front side of 23.
The cylindrical connecting body 23 includes protrusions 23 a and 23 b on the outer periphery thereof, and a cylindrical space 223 having an opening at the front is formed on the inner surface thereof. The space 223 and the inside of the cylindrical insertion portion 21 are formed. The insertion hole 201 for inserting the inner insulator 32 of the coaxial cable 3 formed in the above is continuously provided on the same axis.
The cylindrical fastening body 24 is formed in an outer shape in which the rear side is fixed to the internal space 223 of the cylindrical connecting body 23 by press-fitting and fixing, and the front end is slightly more than the press-fitted portion. A flange 24a having a large diameter is formed. A holding body insertion hole 202 for inserting the holding body 26 for holding the contact pin 8 from the rear side to the front side of the cylindrical fixing body 24 is cylindrical inside the cylindrical fixing body 24. It is formed so as to be concentric with the fastening body 24. At the right end of the holding body insertion hole 202, a holding body fastening piece 203 is formed at the central portion to form an insertion hole having a slightly smaller diameter than the holding body insertion hole 202 on the same axis as the holding body insertion hole 202. The holding body 26 inserted through the holding body insertion hole 202 is prevented from protruding forward.

The holding body 26 is formed of an insulating material such as a synthetic resin, for example, and the contact pin 8 and the cylindrical portion 25 of the connector main body 20 are arranged in a concentric position and insulated between them. For example, as described above, it is formed in an integral structure in which contact pin insertion holes are formed in a cylindrical synthetic resin material.
That is, the connector main body 20 in the embodiment of the present invention is assembled as follows. First, the contact pin holder 26 is mounted from the rear opening end of the holder insertion hole 202 formed in the cylindrical fixing body 24. At this time, the connecting means 50 described later in detail is inserted into the cylindrical fixing body 24 in advance. Next, the rear side of the cylindrical fixing body 24 is press-fitted and fixed to the cylindrical connecting body 23 to complete the assembly.
In this state, an annular groove 23c is formed between the right end of the cylindrical connecting body 23 and the rear side surface of the flange 24a formed on the cylindrical fastening body 24, and the connecting means 50 is connected to the annular groove 23c. It is configured to be pivotally attached.

The right end of the coaxial cable 3 to which the contact pin 8 is fixed is attached to the connector body 20 configured in this way. First, the connector body 20 is inserted so that the contact pins 8 are inserted into the contact pin insertion holes 204 formed in the axial direction of the center of the holding body 26 provided in the connector body 20. When the insertion is further continued, the cylindrical insertion portion 21 provided at the rear of the connector body 20 is inserted between the inner insulator 32 and the braid 33 of the coaxial cable 3, and the connector body 20 and the braid 33 are electrically connected. It will be in the state connected to. At the time of this connection, the right end in the figure of the outer sheath 34 and the braid 33 of the coaxial cable 3 is formed between the cylindrical insertion portion 21 and the cylindrical connection portion 23 located in front of the cylindrical insertion portion 21. It is inserted and mounted until it abuts on the rear side surface 22a of the stepped portion 22. Therefore, when processing the coaxial cable, when the right end in the figure of the outer covering 34 and the braid 33 of the coaxial cable 3 is in contact with the rear side surface 22a of the step portion 22, the right end of the internal insulator 32 is moved to the step portion. The exposed dimension of the center conductor 31 may be determined so that it is at the same position as the plane formed by the front side surface 22b of 22 (the inner rear end of the space 223) or slightly behind the plane.

The contact pin 8 is configured to have a slightly larger diameter on the rear side with respect to the front side, and the right end side of the contact pin insertion hole 204 through which the contact pin 8 is inserted is connected to the front side of the contact pin 8. If the insertion hole 205 has a diameter enough to be inserted, when the connection between the coaxial cable 3 and the connector main body 20 is completed, a step portion generated by the difference in the diameter of the contact pin 8 and the connector pin insertion hole 205 are formed. The step portion is fitted, and the movement can be restricted against the force in the pulling direction of the connector pin 8.
Although not shown in the figure, the diameter of the internal insulator 32 is slightly smaller than the diameter of the internal insulator 32 on the front side of the insertion hole 201, and the contact pin 8 can be easily inserted. By providing a fastening portion having an insertion hole formed so as to have a separation, the right end of the internal insulator 32 comes into contact with the fastening portion when the connector body 20 is inserted into the coaxial cable. It may be configured.

If the connection between the connector main body 20 and the coaxial cable 3 can be made in this way, the fixing ring 5 through which the coaxial cable 3 has been inserted in advance is connected to the outer periphery of the coaxial cable 3 where the cylindrical insertion portion 21 is located. It is mechanically and firmly connected by caulking and fixing. This fixing ring is a caulking tool formed in a ring shape made of a metal material, and can be fixed using a caulking jig having a simple structure.
In addition, the processing method of the coaxial cable in the embodiment of the present invention is not limited to this example, and the processing method is not limited as long as the braid 33 may be folded and connected. Moreover, in addition to the braid 33 as an external conductor, a coaxial cable provided with an aluminum foil may be used, or a coaxial cable having a double braid may be used.
Further, in order to make it easy to insert the outer periphery of the cylindrical insertion portion 21 between the inner insulator 32 and the braid 33 of the coaxial cable 3 and to prevent the coaxial cable 3 from being pulled out with respect to the force in the pull-out direction. By providing the protruding portion 21a, the reliability can be increased in the pulling direction of the coaxial cable. The protrusions 21a need only be at least at the tip of the cylindrical insertion portion 21, and may be provided at a plurality of locations on the outer peripheral surface of the cylindrical insertion portion with appropriate intervals.
In addition, although the configuration example in which the contact pin 8 is connected to the tip of the central conductor 31 of the coaxial cable 3 is shown, the exposed dimension of the central conductor 31 may be increased instead of the connector pin 8. In this case, the holding body 26 may be used, but the internal insulator 32 may be used instead of the holding body 26.

In the above assembly example, the holding body 26 has an integral structure. However, the holding body 26 may have a structure in which a vertically divided body (having an opening in the longitudinal direction) is combined. That is, a flange portion (not shown) is formed in the middle portion of the connector pin 8 and the holder is divided and assembled so as to sandwich the flange portion, so that the flange portion is attached to the inside of the holder 26. Accordingly, the movement of the connector pin 8 in the front-rear direction is limited, and high durability that is strong against the force in the pull-out direction and the pressing force can be achieved. In this case, the connector main body 20 and the coaxial cable 3 are assembled by assembling the coaxial cable 3 to which the contact pins 8 are fixed to the cylindrical insertion portion 21 and the cylindrical connecting body 23 and then to the front of the cylindrical connecting body 23. Assemble from the side so that the contact pin 8 is sandwiched between the upper holder and the lower holder. When the assembly of the holding body is completed, the cylindrical fastening body 24 is completed by press-fitting and fixing to the cylindrical connecting body 23.

When the assembly of the connector main body 20 and the coaxial cable 3 is completed in this way, the coaxial cable cover 10 is attached so as to cover this connecting portion. In the embodiment of the present invention, the coaxial cable cover 10 is configured to cover the right end portion of the coaxial cable 3, the cylindrical insertion portion 21, and the protrusions 23 formed on the outer peripheral surface of the cylindrical connection portion 23. This part is the connection part.
As shown well in FIG. 3, the coaxial cable cover 10 is formed by molding a synthetic resin material whose overall shape is substantially circular. And in the front, it is a fixed shape and the engaging groove part 13a and the level | step-difference part 13b in the inside are fitting with the said protrusions 23a and 23b formed in the outer periphery of the cylindrical connection part 23, respectively. That is, in the pulling-out direction (leftward force) due to the fitting between the protruding body 23a and the locking groove 13a, in the pushing direction (rightward force) due to the fitting between the protruding body 23b and the step 13b. On the other hand, the coaxial cable cover is securely fixed by restricting the movement.
Further, a bellows-like bent portion 11 having flexibility is formed behind the coaxial cable cover 10, and the connecting portion is protected by absorbing the bending force of the coaxial cable 3. In the coaxial cable cover according to the embodiment of the present invention, a synthetic resin material is fixed to the connecting portion by molding or fitting.

Next, the connection means 50 will be described in detail. As shown in FIG. 4, the connecting means 50 according to the present invention includes a cylindrical base 51 attached to the outer periphery of the cylindrical portion 25 of the connector body 20 so as to be pivotable in the circumferential direction. Processing a conductive material such as a metal material that extends to the front side of the cylindrical base 51 and has a cylindrical receiving portion 55 having an expandability for inserting an F-type receptacle to be connected to the inner periphery. It is a thing.
A convex portion 53 projecting in the axial direction is formed on the inner surface of the cylindrical base portion 51, and the convex portion 53 press-fits the rear side of the cylindrical fastening body 24 into the cylindrical connecting body 23. The cylindrical base portion 51 (that is, the connecting means 50) is pivotally attached to the cylindrical portion 25 so as to be fitted into the annular groove portion 23c formed when it is fixed. That is, the assembly is completed by inserting the cylindrical fastening body 24 from the cylindrical receptacle 55 side of the connecting means 50 and then press-fitting the cylindrical fastening body 24 into the cylindrical connection body 23. It will not fall out.
Incidentally, 52 formed on the outer periphery of the cylindrical base 51 is a knurling, which is formed for preventing slipping of the cylindrical operating means described later. Is not necessary. Further, 51a and 51b are a pair of plane portions having a predetermined size formed on the outer periphery of the cylindrical base portion 51 and facing each other. The plane portions 51a and 51b are connected to the cylindrical base portion 51 by two. A surface width is formed.

The cylindrical receptacle 55 has a shaft extending from the front end to the rear of the cylindrical receptacle 55 in order to facilitate the reception of the F-type receptacle to be connected and to improve the connection with the outer conductor of the F-type receptacle. At least one slot 55a extending in the direction is formed. Further, a ring spring 56 is provided on the outer periphery of the distal end portion of the cylindrical receiving portion 55, and the inner periphery of the cylindrical receiving portion 55 and the outer periphery of the F-type receptacle are more reliably connected by the tightening action of the ring spring 56. It is comprised so that.
The cylindrical receptacle 55 may be provided with a ring-shaped spring made of an elastic material having conductivity on the inner periphery of the cylindrical receptacle 55 instead of the slot 55a. However, the present invention is not particularly limited to the embodiments.

Furthermore, a female screw portion 57 that is screwed with a male screw formed at the tip of the F-type receptacle to be connected is formed at the rear portion of the inner surface of the cylindrical receptacle portion 55. For example, the female screw portion 57 in the embodiment of the present application is formed. The threaded portion 57 may be formed in such a number of threads as to be screwed approximately three times between the front end portion of the male thread of the F-type receptacle. In the embodiment of the present invention, since the target is set so that the strength in the pull-out direction is not less than a predetermined value when the cylindrical receptacle is screwed into the F-type receptacle, the screw is engaged approximately three times. Although the number of threads is such that it is not particularly limited to the embodiment, it may be more than 3 rotations or less than 3 rotations.

The cylindrical receptacle 55 is not only configured to be connected to the F-type receptacle to be connected by a combination of sliding and screwing as in the above embodiment, but also electrically connected in a slidingly fixed state. Further, it may be determined that two types of connection methods are possible such that the female screw portion 57 can be used by being screwed into the male screw of the F-type receptacle to be connected. The connection procedure may be any, for example, a female screw may be formed on the substantially front surface of the circumference and used only for screw connection (so-called screw-in type).
Further, the depth of the cylindrical receiving portion 55 is such that the cylindrical portion 25 (in other words, the cylindrical portion 25 in a state where it is screwed to a receptacle whose axial dimension of the F-type receptacle to be connected is the smallest in the standard value). The right end 27 of the fixing body 24) comes into contact with the end face of the F-type receptacle (that is, when the plug is tightened, the front end of the cylindrical receptacle 55 is a pedestal to which the F-type receptacle is attached, for example, If the depth of the cylindrical receptacle 55 is determined so that it does not abut against the wall surface of the housing or the shield case, the high frequency characteristics and the immunity can be improved.
Further, the slit 55a formed in the cylindrical receiving portion 55 is received in the cylindrical receiving portion 55 in consideration of, for example, the case where the plug is used in a state where the plug is slidably fixed to the F-type receptacle to be connected. If it is formed slightly shorter than the size of the F-type receptacle, the gap caused by the slitting is not blocked by the F-type receptacle, so that a high-frequency signal is not leaked or affected by external interference.
That is, according to the embodiment of the present invention, the F-type receptacle to be connected is inserted by sliding until the F-type receptacle comes into contact with the female screw portion 57, and after the contact, the female screw portion is attached to the distal end portion of the F-type receptacle. Since the connection is completed by screwing 57, the connection work can be simplified and the time can be shortened, and it can be fixed so as not to come off. Moreover, even with such a simple connection work, the immunity characteristics and high-frequency characteristics with respect to external interference waves are excellent.

Here, different embodiments of the coaxial plug of the present invention will be described with reference to FIGS. In this embodiment, as shown in FIG. 9, a step 27a is provided on the outer peripheral edge of the front end 27 of the connector body 20 (that is, the end of the cylindrical fastening body 24). The connector body 20 is formed in a ring shape concentrically with the central axis of the connector body 20, and the peripheral diameter is such that it is held in an annular recess formed between the inner periphery of the connecting means 50 and the step 27 a. The direction dimension is slightly larger than the step, and includes a contact ring 61 made of a conductive elastic material formed so as to protrude from the tip 27 of the connector body 20.
That is, when the above-described coaxial plug is configured to be connected to the F-type receptacle by screwing, the contact ring 61 is formed so as to slightly protrude forward in the central axis direction. The tip of the mold receptacle comes into contact with the contact ring 61, and the contact ring 61 is elastically deformed and crushed by further screwing. However, since the end of the F-type receptacle is then brought into contact with the front end 27 of the connector body 20, the contact ring 61 is not crushed more than necessary. That is, since the load in the rotational direction due to screwing is not applied to the contact ring 61 more than necessary, the contact ring 61 is not twisted or cut by friction or the like, and the coaxial plug can be repeatedly attached and detached. In addition to being able to withstand high reliability, good electrical characteristics can be maintained even after repeated mounting and dismounting.

Reference numeral 151 shown in FIG. 5 is a cylindrical operation means made of a synthetic resin material formed so as to cover all or a part of the outer peripheral surface of the cylindrical base 51, and is used for connecting the connection means 50. Is.
In the embodiment of the present invention, the cylindrical operating means 151 is formed of a synthetic resin material having a substantially circular cylindrical shape as a whole, and is attached to the cylindrical base 51 by being fitted or molded. Further, irregularities 153 are appropriately formed on the outer peripheral surface of the cylindrical operation means 151, and the connection work can be made easy by its anti-slip effect. Further, if the cylindrical operation means 151 is formed of an elastic soft material, the burden applied to the fingertip in the connection operation is reduced.
FIG. 6 shows a state in which the cylindrical operating means 151 is attached to the cylindrical base 51. At this time, the contact hole formed in the shape corresponding to each of the plane portions 51a and 51b and penetrating at a position facing the plane portions 51a and 51b having two widths formed in the cylindrical portion 51 of the operating means. 151a, 151b are formed, and open end faces 152a, 152b formed on the peripheries of the corresponding holes 151a, 151b at least in the plane direction perpendicular to the axis of the cylindrical operation means 151 are substantially the same as the plane portions 51a, 51b. By being configured to be on the plane or slightly on the axis side, even if the cylindrical operation means 151 is provided, mechanical connection can be made by directly sandwiching the plane portion 51a with a tool such as a wrench or spanner. The connection with the fingertip is also possible, and the cylindrical operation means 151 does not impair the tightening performance of the connection means 50.

In the embodiment of the present invention, the cylindrical operation means 151 shows an example in which the front side and the rear side are formed with substantially the same peripheral diameter. However, as shown in FIG. The outer peripheral diameter of the front opening end may be made larger, and a pressing finger hook 155 may be provided on the outer peripheral surface of the front opening end of the cylindrical operation means 151. That is, an object of the present invention includes reducing the complexity of plug connection and making it possible to make a connection that is still difficult to pull out. Until the contact with the portion 57, it is inserted by sliding, and after the contact, the female screw portion 57 is screwed into the tip of the F-type receptacle to complete the connection. Therefore, if a force is applied so that the plug is pressed against the F-type receptacle at the time of connection, the connection work can be performed smoothly and reliably. That is, the finger hook 155 protrudes radially outward from the front opening end of the cylindrical operation means 151 so that the fingertip can be easily applied to the finger hook 155 and applies a pressing force to the connection means. Thus, the female screw portion 57 can be smoothly screwed into the F-type receptacle. For example, when the plug is connected to a non-projecting type embedded in a cylindrical space 83 often seen in the television terminal 80 as shown in FIG. The connection can be simplified by the anti-slipping effect and the action of receiving the pressing force of the finger hook 155. When the connection is completed, the finger hook 155 comes close to the panel 82 that closes the TV terminal and does not protrude from the panel 82. Therefore, the finger hook 155 does not get in the way. . Further, in order to pull out the plug 2 from the receptacle, the cylindrical operation means 151 (that is, the connection means) may be first rotated, and the finger hook 155 is not particularly required, but the screwing to the F-type receptacle is released. As a result, the gap between the panel 82 and the finger hook 155 is increased and the finger hook 155 can be easily hooked. Therefore, the finger hook 155 also serves to facilitate the extraction of the plug 2.

As described above, according to the present invention, the positions of the two surface widths formed in the cylindrical operation means 151 and the cylindrical base 51 which are the rotation operation parts of the connection means 50 are sequentially arranged behind the cylindrical receptacle 55. Since it is configured so that it overlaps at substantially the same position, it is possible to reduce the size without increasing the length in the front-rear direction of the plug more than a predetermined length while having a variety of plug connection means. is there. In other words, for example, even if the F-type receptacle 83 to be connected is a non-projecting type often seen in the TV terminal 80, the connection work can be easily performed by any method, whether it is a fingertip or a tool. It can be held firmly so that it will not fall out. In addition, because of the small size, the projecting dimension from the wall surface to which the TV terminal is attached can be shortened.
If the cylindrical operating means 151 is formed of a rigid synthetic resin material, it is sufficient to form a width of two surfaces on the outer periphery of the cylindrical operating means 151. In this case, it is necessary to provide the through holes 151a and 151b. There is no. Therefore, it is not necessary to form a two-surface width in the cylindrical base 51, and the cost can be reduced.
Further, when the cylindrical operating portion 151 is provided in the cylindrical base 51 as described above, the knurling formed on the cylindrical base 51 may not be provided. However, if the knurling is formed, the inner surface of the cylindrical operating means 151 may be provided. The cylindrical operating means 151 can be prevented from idling by being fitted with a groove (not shown in the figure) formed in the, and the force applied to the cylindrical operating means 151 can be transmitted without loss. Furthermore, if the anti-slip effect of the unevenness 153 formed on the outer peripheral surface of the cylindrical operation means 151 is added, the connection to the F-type receptacle that is the connection target of the connection means 50 is simple and strong even if it is a fingertip. Can be tightened to.
If the width of the two surfaces is 11 mm, which is the same as that of a conventional screw type F-type connector, the conventional tool can be used as it is for the plug of the present invention, and the convenience is not impaired.

Next, a second embodiment of the present invention will be described with reference to FIG. In the following description, the same components as those in the coaxial cable with a plug according to the above embodiment are given the same reference numerals, and detailed description thereof is omitted. In this different embodiment, the connector main body 20 is disposed so that the axis of the cylindrical insertion portion 121 is substantially orthogonal to the axis of the cylindrical portion 25 constituting the connector main body 20, and the plug is It is configured to be substantially L-shaped.

Here, details of the connector main body 20 in different embodiments of the present invention will be described. As well shown in FIG. 8, the connector main body 20 includes a cylindrical connecting body 23 and a cylindrical fastening body 24 disposed on the front side of the cylindrical connecting body 23, as in the above embodiment. A cylindrical portion 25 and a cylindrical insertion portion 121 which is provided at a rear position of the cylindrical connecting body 23 and protrudes toward the outer peripheral direction of the cylindrical connecting body 23 are configured.
The cylindrical connecting body 23 in this embodiment is formed with a space 28 that is opened by extending the outer peripheral wall rearward, and this space 28 has a space 223 that press-fits the cylindrical fastening body 24 that opens forward. Partitioned by a partition 222. An insertion hole 206 for inserting the contact pin 8 is formed at the center position of the partition wall 222, and the rear 8 a of the contact pin 8 attached to the holding body 26 projects from the space 28.
Moreover, the cylindrical insertion part 121 in this embodiment is comprised separately from the said cylindrical connection part 23, and shape | molds the metal material which has electroconductivity. The cylindrical insertion portion 121 has one end 122 attached to a mounting hole formed on the peripheral surface of the cylindrical connecting portion 23 by caulking or press fitting.

One end of the coaxial cable 3 processed to a predetermined length is attached to the connector main body 20 thus configured. First, the cylindrical insertion portion 121 is inserted between the inner insulator 32 of the coaxial cable 3 and the braid 33, and the connector body 20 and the braid 33 are in an electrically connected state. At the time of this connection, the outer covering 34 of the coaxial cable 3 and the end of the braid 33 in the figure are inserted and attached until they abut against the side wall of the cylindrical connecting portion 23. That is, the processing of the coaxial cable is performed when the end portion of the outer sheath 34 of the coaxial cable 3 or the braid 33 in the drawing contacts the side wall of the cylindrical connection portion 23, and the tip end portion of the center conductor 31 becomes the contact pin. The exposed dimension of the center conductor 31 may be determined so that the center conductor 31 is disposed at a position intersecting with the rear end portion 8a. When the coaxial cable is completely inserted in this way, the rear end portion 8a of the contact pin 8 and the center conductor 31 are fixed inside the space 28 by means such as soldering or caulking. When the connection between the contact pin 8 and the center conductor 31 is completed, a lid 29 for closing the opening end is attached to the opening end of the space 28. The lid 29 is made of a metal material, so that a high-frequency signal does not leak from the connection part, or a signal passing through the coaxial cable is not affected by an interference wave from the outside. It is.

If the connection between the connector main body 20 and the coaxial cable 3 can be ensured in this way, the fixing ring 5 through which the coaxial cable 3 has been inserted in advance is fixed by caulking from the outer periphery of the coaxial cable 3 where the cylindrical insertion portion 121 is located. By doing so, it is mechanically and firmly connected. This fixing ring is a caulking tool formed in a ring shape made of a metal material, and can be fixed using a caulking jig having a simple structure.
When the assembly of the connector main body 20 and the coaxial cable 3 is completed, the coaxial cable cover 100 is attached so as to cover this connecting portion. In a different embodiment of the present invention, the coaxial cable cover 100 includes an end portion of the coaxial cable 3, a cylindrical insertion portion 121, and a rear side of the ridge body 23 formed on the outer peripheral surface of the cylindrical connection portion 23. It is comprised so that it may cover, and this part is a connection part as described in a claim hole.
In the different embodiments of the present invention, the coaxial cable cover 100 is formed with a synthetic resin shell, and is fixed to the connecting portion by molding.

As described above, according to the coaxial plug of the present invention, the F-type receptacle to be connected is inserted by sliding until the F-type receptacle comes into contact with the female screw portion, and after the contact, the female screw portion is attached to the tip of the F-type receptacle. Since the connection is completed by screwing, the connection work time can be shortened. Further, by setting the number of times of screwing to about 3 rotations, it is possible to have a strength greater than a predetermined value with respect to the pulling force in the pulling-out direction. In addition, the connecting means is provided with a cylindrical operating means provided with uneven means and a finger hook, so that it can be easily and firmly applied only by the force of the fingertip by the anti-slip action of the uneven face and the receiving action of the pressing force of the finger hook. Can be clamped to the mold receptacle. Therefore, even when using a portable terminal-side device such as a personal computer or a small LCD TV to enjoy the TV in the required place when necessary, it is easy to connect and disconnect. It is excellent in ease of use, with goodness and handling that does not put a burden on the fingertip.
In addition, even if connection work can be done in this way, it has excellent immunity characteristics against external interference. If this coaxial cable connector with plug is used, it is used by general users who do not have special technology. However, optimal wiring for digital broadcast reception, such as connection between a TV terminal and a TV with a built-in tuner for receiving digital broadcast or a personal computer, becomes possible.
In addition, the cylindrical base portion constituting the main body portion of the connecting means has a two-surface width, and from the abutment hole formed in the cylindrical operating means, the two-surface width formed in the cylindrical base portion is Tightening work can be done with direct tool contact. In other words, since the cylindrical operation means and the two-surface width are arranged so as to overlap substantially the same position behind the cylindrical receptacle, the length of the coaxial plug in the front-rear direction can be reduced. For example, even if the F-type receptacle to be connected is a non-protruding TV terminal embedded in a cylindrical space, the connection work is easy even if it is a fingertip. A permanent connection that does not remove once connected, such as when the type receptacle is a TV terminal installed on the wall on the back of a TV stand or the like, can be connected with a tool Therefore, a strong connection can be made without applying a load to the fingertip. In addition, since the width of the two surfaces is 11 mm, which is the same as that of a conventional screw type F-type connector, it is possible to use a commercially available tool or a tool that is commonly used at home, and is excellent in convenience. And since the dimension in the axial direction is short, even if it is a limited space behind the TV or connected to the TV terminal, it can be neatly wired.
In addition, this coaxial plug can shorten the connection time to the F-type receptacle to be connected and can be firmly connected, so not only the connection between the TV terminal and the TV receiver, but also a distributor, series unit, etc. It is possible to provide a high-performance, high-reliability coaxial plug suitable for digital broadcast-compatible TV reception in-home wiring systems, which means that the construction work can be shortened by using the coaxial cable to connect the cable.

It should be noted that the present invention is not limited to the above-described embodiment, and the configuration of each part can be changed as appropriate without departing from the spirit of the present invention.

It is explanatory drawing of the cross section which fractured | ruptured a part of coaxial cable with a plug of 1st Embodiment using the coaxial plug which concerns on this invention. It is explanatory drawing which shows the partial cross section of the connector main body and holding body which comprise the coaxial cable with a plug. It is explanatory drawing which shows the coaxial cable cover which comprises the coaxial cable with a plug. It is explanatory drawing which shows the partial cross section of the connection means which comprises the coaxial cable with a plug, (a) is a top view, (b) is a side view. It is explanatory drawing which shows the partial cross section of the cylindrical operation means with which the connection means which comprises the coaxial cable with a plug is shown, (a) is a top view, (b) is a side view. 5 is an explanatory view showing a state in which the cylindrical operation means of FIG. 5 is attached to the connection means of FIG. 4, (a) is a top view, and (b) is a side view. It is explanatory drawing of the state which attached the Example from which the cylindrical operation means differs to the connection means of FIG. 5, (a) is a top view, (b) is a side view. It is explanatory drawing when connecting the plug shown in FIG. 7 to a television terminal, (a) shows the state before a connection, (b) shows the state after a connection. It is explanatory drawing of the Example from which the connector main body which comprises the coaxial cable with a plug differs, (a) shows a partial cross section. (B) The front view and side view of a contact ring are shown. (C) is a partial cross-sectional view in which a contact ring is mounted on the connector body. It is explanatory drawing of the coaxial plug of a different Example, and shows a partial cross section. It is explanatory drawing of the cross section which fractured | ruptured a part of coaxial cable with a plug of 2nd Embodiment which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Coaxial cable with a plug, 2 ... Plug, 3 ... Coaxial cable, 5 ... Fixing ring, 10.100 ... Coaxial cable cover, 8 ... Contact pin, 8a ... Rear end part, 11 ... Bending part, 13a ... Locking groove part , 13b ... Step part, 20 ... Connector body, 21/121 ... Cylindrical insertion part, 21a ... Protrusion part, 22 ... Step part, 22a ... Back side of step part, 23 ... Cylindrical connector, 23a / 23b ... Projection Body, 23c ... annular groove, 24 ... cylindrical fastening body, 24a ... collar, 25 ... cylindrical part, 26 ... holding body, 27 ... tip, 27a ... step, 28 ... space, 29 ... lid, 31 ... Center conductor 32 ... Insulator 33 ... External conductor 34 ... Protective coating 50 ... Connecting means 51 ... Cylindrical base 51a / 51b Planar part 52 ... Knurling 53 ... Convex part 55 ... Cylindrical shape Receiving part, 55a ... slot, 56 ... re Gspringe, 57 ... Female thread part, 61 ... Contact ring, 80 ... TV terminal, 82 ... Panel, 83 ... Space, 85 ... F-type receptacle, 151 ... Cylindrical cylindrical operating means, 151a / 151b ... Through-hole, 152a / 152b ... Open end face, 153 ... Concavity / convexity, 155 ... Finger hook, 201 ... Insertion hole, 202 ... Holding body insertion hole, 203 ... Holding body fastening piece, 204 ... Contact pin insertion hole, 205 ... Insertion hole, 206 ... Insertion hole, 222: partition wall, 223: space

Claims (5)

At least the connector main body to which the coaxial cable is mounted, and the inner peripheral center position of the connector main body, which is disposed in the connector main body and is electrically insulated from the contact pin of the coaxial plug connected to the central conductor of the coaxial cable. A holding body, a connection means for connecting to a connection object provided in front of the connector body, and a cylindrical operation for rotating the connection means fitted on the outer periphery of the connection means A coaxial plug to be attached to the end of the coaxial cable,
The connecting means comprises a cylindrical base for pivotally attaching to the front outer periphery of the connector body, and a cylindrical receptacle for connecting a connection object,
The cylindrical base portion of the connecting means is formed with a two-plane width composed of a pair of plane portions arranged in parallel to the opposing positions on the outer periphery,
It said operating means, the flat portion has been configured to have a person with hole penetrating to expose,
Coaxial plug characterized by that. The cylindrical receiving portion of the connecting means has an expansibility for inserting an F-type receptacle to be connected to the inner periphery, and is a female screw that engages with a male screw formed at the tip of the F-type receptacle. The coaxial plug according to claim 1, wherein a screw portion is formed. The coaxial plug according to any one of claims 1 and 2, wherein the cylindrical operation means has a non-slip unevenness on an outer peripheral surface. The coaxial plug according to any one of claims 1 to 3, wherein a pressing finger hook projecting radially outward is provided at a front end portion of the cylindrical operation means. . A step is provided at the outer peripheral edge of the front end of the connector body, and the step is formed in a ring shape that is concentric with the central axis of the connector body. A contact made of a conductive elastic material formed so as to be held in an annular recess formed between the step and having a dimension in the central axis direction slightly larger than the step and protruding from the tip of the connector body. The coaxial plug according to any one of claims 1 to 4, further comprising a ring.

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