JP3144243U - Coaxial cable connector - Google Patents

Abstract

Provided is a coaxial cable connector that can be easily attached to a coaxial cable and can prevent parts from being lost during assembly.
A core contact 22 joined to a central conductor 14 at an end of a coaxial cable, an insulating spacer 28 press-fitted into an intermediate portion of the core contact 22, and a backup ring that presses the tip of the core contact 22. 30, a multi-stage cylindrical reinforcing sleeve 34, a shell 48 that integrally covers and holds the backup ring 30 and the reinforcing sleeve 34, a cylindrical clamp 40 that presses the outer peripheral surface of the end portion of the coaxial cable, and a shell 48 And a connection nut 58 rotatably connected to the end.
[Selection] Figure 1

Description

  The present invention relates to a coaxial cable connector that is attached to an end of a coaxial cable in order to electrically connect the coaxial cable to a counterpart coaxial cable or device.

In order to electrically connect a coaxial cable to a counterpart coaxial cable, equipment, or the like, it is necessary to electrically and mechanically connect the central conductor and the outer conductor of the coaxial cable at the same time. For this purpose, conventionally, a core contact that is connected to the central conductor of the coaxial cable, a shell that holds this on the shaft via an insulating spacer or backup ring, and a clamp that fixes the shell to the end of the coaxial cable. It is known to use a connector provided with the above (see Patent Document 1 and Patent Document 2).
JP-A-6-29062 Japanese Patent Application Laid-Open No. 11-345657

  By the way, the conventional techniques as described above have the following problems to be solved. In laying of coaxial cables and equipment, terminal installation work of coaxial cables is often performed outdoors. In such a case, it is desired that the work is simple and can be performed in a short time, and that a reliable seal is provided between the coaxial cable and the connector.

  This type of conventional coaxial cable connector has a structure in which a large number of parts are used for the outer conductor and the center conductor of the coaxial cable and are tightened and fixed by a complicated mechanism. In addition, since a fastening bracket is used as a part for fixing a cylindrical clamp, a shell, or the like, the following work is performed when the terminal of the coaxial cable is mounted.

  That is, when the coaxial cable terminal is installed, the fastening bracket is separated from the connector body in advance and inserted into the coaxial cable, and after joining the coaxial cable end and the connector body, the fastening bracket is pulled back to the connector. Connect to the main unit. For this reason, there has been a problem that the terminal installation work of the coaxial cable is complicated, or parts are lost during the work and extra work is required.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a coaxial cable connector that can be easily attached to a coaxial cable and can prevent parts from being lost during assembly.

The following configurations are means for solving the above-described problems.
<Configuration 1>
An intermediate core contact having an insertion hole for inserting the central conductor at the end of the stripped coaxial cable at one end, and a slit provided on the peripheral wall forming the insertion hole, and an intermediate portion of the intermediate contact An insulating spacer to be press-fitted, and a backup ring that has a tapered surface surrounding the opening of the insertion hole of the core contact, and presses one end of the core contact in the radial direction with the taper surface to reduce the diameter; A reinforcing sleeve having a large-diameter portion covering the outer peripheral surface of the backup ring, a small-diameter portion inserted between the outer conductor of the coaxial cable end and the insulator, and one end portion of the insulating ring being engaged with the insulating spacer; A shell that covers and holds the backup ring and the reinforcing sleeve integrally disposed on the inner peripheral surface of the intermediate portion, and is locked to a concave portion or a convex portion provided on the inner peripheral surface of the shell on the outer peripheral surface. Is A cylindrical clamp that has a convex portion or a concave portion and presses the outer peripheral surface of the end portion of the coaxial cable located on the small diameter portion of the reinforcing sleeve when fitted along the inner peripheral surface of the shell; and the shell A coaxial cable connector comprising a connection nut rotatably coupled to an end of the cable.

  Since there is no fastening bracket that has been used as a part to fix a cylindrical clamp, shell, etc. during installation to the coaxial cable, the fastening bracket is separated from the connector body in advance and inserted into the end of the coaxial cable. Since the coaxial cable can be connected simply by pushing the cylindrical clamp into the shell, the installation work is simplified and smoother. In addition, since each component is mounted on the shell and integrated, it is possible to prevent the component from falling during the mounting operation to the coaxial cable. This is particularly convenient during installation work at high places. Furthermore, since the above-mentioned fastening metal fitting is not used, the number of parts is small and the cost can be reduced.

<Configuration 2>
In the coaxial cable connector according to Configuration 1, the insulating spacer presses the core contact toward the backup ring and presses one end portion of the core contact in a radial direction with the taper surface of the backup ring. A coaxial cable connector characterized by having a diameter.

<Configuration 3>
In the coaxial cable connector according to Configuration 1 or 2, the cylindrical clamp is made of resin, and an uneven portion is provided on an inner peripheral surface that contacts the outer peripheral surface of the end portion of the coaxial cable. Coaxial cable connector.

  During installation to the coaxial cable at the site, the coaxial cable can be firmly held to prevent it from coming off.

<Configuration 4>
4. The coaxial cable connector according to any one of configurations 1 to 3, wherein the small-diameter portion of the reinforcing sleeve has a conductor foil and a conductor of the same outer conductor when the outer conductor at the end of the coaxial cable is composed of a conductor foil and a conductor braid. A coaxial cable connector which is inserted between a braid.

  The outer conductor at the end of the coaxial cable is separated into the conductor foil and the conductor braid by the reinforcing sleeve, but since the diameter of the flexible conductor braid is larger than that of the conductor foil, the separation work by the reinforcing sleeve is smooth.

<Configuration 5>
The coaxial cable connector according to any one of configurations 1 to 4, wherein the connection nut surrounds and crimps a protruding portion provided on an end portion of the shell with an extended cylindrical portion on a side surface, thereby tightening the end portion of the shell. A coaxial cable connector that is rotatably connected to the cable.

  The connecting nut is connected to the shell with the same function as the universal joint.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

FIG. 1A is a one-side sectional view showing a coaxial cable connector (hereinafter simply referred to as a connector) 10 of Example 1, and FIG. 1B is a one-side sectional view showing an end portion of a terminal-processed coaxial cable. . 2 to 8 are explanatory views showing the respective components of the connector 10, FIG. 9 is a half sectional view showing a state in which the connector 10 is mounted on the coaxial cable 12, and FIG. 10 shows an example of a receptacle connected to the connector 10. It is a half sectional view.
As shown in FIG. 1A, the connector 10 includes a core contact 22 joined to the central conductor 14 at the end of the coaxial cable, an insulating spacer 28 press-fitted into the middle portion of the core contact 22, and a core. A backup ring 30 that presses the tip of the contact 22, a multi-stage cylindrical reinforcing sleeve 34, a shell 48 that integrally covers and holds the backup ring 30 and the reinforcing sleeve 34, and an outer peripheral surface of the coaxial cable end. And a connecting nut 58 rotatably connected to the end of the shell 48.

  The connector 10 is configured to receive the end portion of the coaxial cable 12 that has been stripped as shown in FIG. The coaxial cable 12 has, for example, an outer conductor 18 composed of a foamed polyethylene insulator 16, a conductor foil 18a such as an aluminum foil and a conductor braid 18b such as an annealed copper wire, and a PVC sheath 20 on the outer periphery of a center conductor 14 of a single copper wire. It is a well-known structure which is sequentially coated.

  The coaxial cable 12 is accurately measured in advance, and the center conductor 14 and the outer conductor 18 are stripped by a predetermined length, and the conductor braid 18b at the end of the outer conductor is folded back onto the sheath 20 so that the insulator 16 is stripped. Terminal processing.

  As shown in FIG. 2, the center core contact 22 has a large diameter from one end to the intermediate first step portion 23 a, and an insertion hole 24 and the insertion hole 24 are formed at the end of the large diameter. It has a slot 26 provided on the peripheral wall. A second step portion 23 b that protrudes with a tapered surface is provided at an intermediate portion of the core contact 22. The center conductor 14 at the end of the stepped coaxial cable 12 is inserted into the insertion hole 24. An insulating spacer 28 is fitted in the middle portion of the core contact 22.

  The insulating spacer 28 is a plastic molded product, and as shown in FIG. 3, a step portion 29a is provided on the outer peripheral surface. When the metal core contact 22 is press-fitted into the inner peripheral surface of the insulating spacer 28, the insulating spacer 28 is made of plastic and is more flexible than metal, and therefore the second step portion 23 b of the core contact 22 is formed by the insulating spacer 28. A recess 29b that bites into the inner peripheral surface is inevitably formed and cannot be removed, and the core contact 22 and the insulating spacer 28 are fixed. A backup ring 30 is disposed at a position in contact with the peripheral wall forming the insertion hole 24 of the core contact 22.

As shown in FIG. 4, the backup ring 30 is a plastic molded product, and as shown in FIG. 4, a tapered surface that surrounds the insertion hole 35 through which the central conductor 14 of the coaxial cable 12 is inserted and the opening of the insertion hole 24 of the center contact 22. 32. The backup ring 30 has a tapered surface 32 that presses one end of the core contact 22 in the radial direction to reduce the diameter. The backup ring 30 has a structure in which the outer diameter of a part 31a of the outer peripheral surface is reduced in order to obtain an appropriate capacitance so as to match the characteristic impedance while having a predetermined strength. For this reason, the part 31b whose outer diameter is not reduced has a shape in which four protrusions are provided at equal intervals.
A reinforcing sleeve 34 is disposed adjacent to the backup ring 30.

  The reinforcing sleeve 34 is made of metal, and as shown in FIG. 5, a large diameter portion 36 is provided on the side adjacent to the backup ring 30, and a small diameter portion 38 is provided on the opposite side. The large diameter portion 36 has a structure that covers the outer peripheral surface of the backup ring. The small diameter portion 38 is inserted between the conductor foil 18a and the conductor braid 18b of the outer conductor 18 at the end of the coaxial cable, and is a thin cylindrical body. An uneven surface 39 for maintaining the tensile strength when the coaxial cable is mounted is provided on the outer peripheral surface of the small diameter portion 38.

  The insulating spacer 28, the core contact 22, the backup ring 30, and the reinforcing sleeve 34 are integrally covered and held by a shell 48. As shown in FIG. 6, the shell 48 is provided with a protruding portion 50 that is engaged with the step portion 29 a of the insulating spacer 28 on the inner periphery of one end portion. A connection nut 58 is rotatably connected to the end of the shell 48. A circumferential groove 52 for holding the connection nut 58 is provided near the end of the shell 48. A concave portion 54 that is recessed with a tapered surface is provided on the inner peripheral surface of the shell 48.

  As shown in FIG. 7, the connection nut 58 is provided with a hexagonal plane portion on the outer peripheral surface of the intermediate portion, an extension tube portion 59 on the side surface, and a screw surface 60 on the inner peripheral surface. The connection nut 58 surrounds the shell end portion by the extension tube portion 59 and crimps the end of the extension tube portion along the outer surface of the circumferential groove portion 52 of the shell 48 as shown in FIG. Is rotatably connected to.

  When the thread surface 60 of the connection nut 58 is connected to a receptacle described later, the annular gasket 47 is sandwiched therebetween to maintain water tightness. The connection nut 58 is connected to the shell 48 with the same function as the universal joint.

  A resin-made cylindrical clamp 40 is disposed between the small diameter portion 38 of the reinforcing sleeve 34 and the shell 48. The cylindrical clamp 40 is a cylindrical shape that can be fitted along the inner peripheral surface of the shell, and a protrusion 41 is provided on the outer periphery of one end. The outer diameter of the projection 41 and the outer diameter of the shell 48 are substantially the same. An annular gasket 46 is disposed between the protrusion 41 of the cylindrical clamp 40 and the tip of the shell 48.

  As shown in FIG. 8, the cylindrical clamp 40 has a convex portion 42 that is engaged with a concave portion 54 on the inner peripheral surface of the shell on the outer peripheral surface. The concave portion 54 on the inner peripheral surface of the shell and the convex portion 42 on the outer peripheral surface of the cylindrical clamp may be fitted to each other.

  An uneven portion 43 such as a screw surface is provided on the inner peripheral surface of the intermediate portion of the cylindrical clamp 40. The concave / convex portion 43 abuts on the outer peripheral surface of the end portion of the coaxial cable when the coaxial cable 12 is attached, and firmly holds the coaxial cable to prevent the coaxial cable 12 from being pulled out and also maintains water tightness.

FIG. 9 is a half sectional view showing a state where the connector 10 is attached to the coaxial cable 12.
When the connector 10 of the present invention is connected to the coaxial cable 12, the connector 10 is in the state shown in FIG. 1A, that is, the cylindrical clamp 40 is protruded from the end of the shell 48. At this time, the convex portion 42 on the outer peripheral surface of the cylindrical clamp is engaged with the concave portion 54 on the inner peripheral surface of the shell so that the cylindrical clamp 40 does not come out of the shell 48. Then, as shown in FIG. 1B, the end portion of the coaxial cable 12 subjected to the terminal treatment is inserted into the shell 48, and the center conductor 14 is inserted into the insertion hole 24 of the core contact 22. At this time, the small diameter portion 38 of the reinforcing sleeve 34 is inserted between the conductor foil 18a of the outer conductor at the end of the coaxial cable and the conductor braid 18b, as shown in FIG.

  Next, the cylindrical clamp 40 is press-fitted into the shell 48 using a dedicated tool (not shown). Thus, the sheath 20 of the coaxial cable 12 is clamped and fixed between the small diameter portion 38 of the reinforcing sleeve 34 and the cylindrical clamp 40. Further, the central conductor 14 of the coaxial cable 12 is fixed by pressing one end portion of the core contact 22 in the radial direction and reducing the diameter by the tapered surface 32 of the backup ring 30.

In addition, the annular gasket 46 is reduced in diameter and is pressure-bonded to the cylindrical clamp 40 and the shell 48 to ensure watertightness between them. The outer conductor 18 of the coaxial cable 12 is electrically connected to the shell 48 via the reinforcing sleeve 34. This completes the mounting of the connector 10 and the coaxial cable 12.
In the present invention, the connector mounting operation is completed with almost one touch only by pressing the cylindrical clamp 40 into the shell 48.

  For example, a receptacle 64 as shown in FIG. 10 is connected to the connector 10 thus configured. The receptacle 64 has a well-known structure, and holds two receiving spring-like conductors 66 arranged opposite to each other by two insulators 68 and 70 and a shell 72. The receptacle 64 is connected by fitting the receiving spring-like conductor 66 to the core contact 22 and screwing the screw outer peripheral surface 72 a of the shell 72 into the screw surface 60 of the connection nut 58. The seal between the receptacle 64 and the connection nut 58 is obtained by pressing the annular gasket 47 against both.

  Further, by screwing the receptacle 64 into the connection nut 58, the core contact 22 is moved to the backup ring 30 side together with the insulating spacer 28 pressed in the arrow direction by the receptacle 64. For this reason, the tip of the center contact 22 having the slit 26 is pressed by the tapered surface 32 of the backup ring 30 to reduce the diameter. Thus, the central conductor 14 of the coaxial cable 12 is fixed to the connector 10 and good electrical contact with the core contact 22 can be maintained.

  Note that the receptacle 64 connected to the connector of the present invention is not limited to that shown in FIG. That is, when the receptacle 64 is screwed into the threaded surface 60 of the connection nut 58 at the time of connection with the connector of the present invention, the insulating spacer 28 is pressed by the receptacle 64, and the insulating spacer 28 moves the center contact 22 toward the backup ring 30. What is necessary is just to perform a series of operations in which the taper surface 32 of the backup ring is pressed and the distal end portion of the core contact 22 is radially pressed to reduce the diameter.

  In the connector according to the present invention, since the components are integrated via the shell 48, the components can be prevented from dropping during the mounting operation. This is particularly convenient when working at high altitudes. Furthermore, the coaxial cable 12 can be steadily attached by simply press-fitting the cylindrical clamp 40 into the shell 48.

  In addition, there is no fastening bracket that has been used as a component to fix a cylindrical clamp, shell, etc. during installation to the coaxial cable, so the end of the coaxial cable is separated from the connector body in advance. Since the coaxial cable can be connected simply by pushing the cylindrical clamp into the shell, the installation work is simplified and smoother. In addition, since each component is mounted on the shell and integrated, it is possible to prevent the component from falling during the mounting operation to the coaxial cable. This is particularly convenient during installation work at high places. Furthermore, since the above-mentioned fastening metal fitting is not used, the number of parts is small and the cost can be reduced.

(A) is the one side sectional view which shows the connector of Example 1, (b) is the one side sectional view which shows the edge part of the coaxial cable by which the terminal process was carried out. It is a figure which shows the core contact of the connector, (a) is a half sectional view, (b) is a left side view. It is a half sectional view which shows the insulating spacer of the connector. It is a figure which shows the backup ring of the connector, (a) is a half sectional view, (b) is a left side view, (c) is a right side view. It is a half sectional view which shows the reinforcement sleeve of the connector. It is a half sectional view which shows the shell of the connector. It is a figure which shows the connection nut of the connector, (a) is one-side sectional drawing, (b) is a right view. It is a half sectional view which shows the cylindrical clamp of the connector. It is a half sectional view which shows the state which mounted | wore the coaxial cable with the same connector. 2 is a half sectional view showing an example of a receptacle connected to a connector 10. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coaxial cable connector 12 Coaxial cable 14 Center conductor 16 Insulator 18 Outer conductor 18a Conductor foil 18b Conductor braid 20 Sheath 22 Center contact 23a First step part 23b Second step part 24 Insertion hole 26 Slot 28 Insulation spacer 30 Backup ring 32 Tapered surface 34 Reinforcement sleeve 35 Insertion hole 36 Large diameter portion 38 Small diameter portion 40 Cylindrical clamp 41 Protrusion portion 42 Convex portion 43 Concavity and convexity 46 Annular gasket 47 Annular gasket 48 Shell 50 Protrusion portion 52 Circumferential groove portion 54 Concavity 58 Connection nut 59 Extension cylinder 60 Thread surface

Claims (5)

A core contact having an insertion hole for inserting the central conductor at the end of the stripped coaxial cable at one end, and a slit provided on a peripheral wall forming the insertion hole;
An insulating spacer press-fitted into an intermediate portion of the core contact;
A backup ring having a tapered surface surrounding the opening of the insertion hole of the core contact, and pressing the one end of the core contact in the radial direction with the taper surface;
A reinforcing sleeve having a large-diameter portion covering the outer peripheral surface of the backup ring, and a small-diameter portion inserted between the outer conductor of the coaxial cable end and the insulator;
A shell whose one end is locked to the insulating spacer and integrally covers and holds the backup ring and the reinforcing sleeve disposed on the inner peripheral surface of the intermediate portion;
A small diameter of the reinforcing sleeve when the outer peripheral surface has a convex portion or a concave portion locked to the concave portion or the convex portion provided on the inner peripheral surface of the shell and is fitted along the inner peripheral surface of the shell. A cylindrical clamp that presses the outer peripheral surface of the end of the coaxial cable located on the part;
A coaxial cable connector comprising a connection nut rotatably connected to an end of the shell. The coaxial cable connector according to claim 1, wherein
The insulating spacer presses the core contact toward the backup ring and presses one end of the core contact in the radial direction with the tapered surface of the backup ring to reduce the diameter. Coaxial cable connector. The coaxial cable connector according to claim 1 or 2,
The said cylindrical clamp is resin, The coaxial cable connector characterized by the uneven | corrugated | grooved part being provided in the internal peripheral surface contact | abutted to the outer peripheral surface of the said coaxial cable edge part. In the coaxial cable connector according to any one of claims 1 to 3,
The small diameter portion of the reinforcing sleeve is inserted between the conductor foil and the conductor braid of the outer conductor when the outer conductor of the end portion of the coaxial cable is composed of a conductor foil and a conductor braid. To coaxial cable connector. In the coaxial cable connector according to any one of claims 1 to 4,
The coaxial cable is characterized in that the connection nut is rotatably connected to the end portion of the shell by surrounding and crimping a protruding portion provided at the end portion of the shell with an extended cylindrical portion on a side surface. connector.

Images