JP2012234726A - Coaxial connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coaxial connector capable of preventing possibility of detachment after attachment while satisfying easiness in attaching.SOLUTION: A coaxial connector 20 includes a shell 110 which holds a core wire 11 that protrudes from the end part of a coaxial cable 10 and holds the coaxial cable at a center position under such condition that a braid 13 is folded back on a covering 14 of the coaxial cable, and a cover 300 which secures a shell in the axial direction of the coaxial cable. It includes an external contact 210 in which a threaded groove which engages with the threaded groove of a connector sheet 30 is provided on the inner peripheral surface, with a tapered part 212 formed at the end part of an outer peripheral surface, and with a plurality of slit 211 extending axially from a tip end side toward a base end side being provided, which is capped over the shell so that an open end can contract in radial direction. It further includes a lock nut 220 which contains a rib 223 that is inserted in the slit of the external contact, on the inner peripheral surface, and is capped over the external contact to slide on the outer periphery of the external contact in axial direction, so as to pressurize, inward along radial direction, the tapered part of the external contact to allow contraction in radial direction.

Description

  The present invention relates to a coaxial connector, and more particularly to a coaxial connector that can be inserted and removed with a simple operation.

  Many coaxial connectors, such as F-type connectors, are basically mounted and fixed to a spigot seat by screwing operation. With this type of connector, it is impossible to install one connector with a single touch or a simple operation. For this reason, when many coaxial connectors are connected or disconnected, the amount of work is enormous, and improvement measures have been demanded.

  Therefore, conventionally, for example, coaxial connectors as shown in Patent Document 1 and Patent Document 2 are provided.

Utility Model Registration No. 3101258 JP 2010-257936 JP

  However, although those described in any of the above-mentioned patent documents satisfy the simplicity of work when mounted on the spigot seat, they tend to come off easily after connection, and lack reliability. It is often the case that a tensile force acts on the coaxial cable without interruption, which causes a serious problem because the connection is broken.

  The present invention has been made in consideration of the above-described points, and an object of the present invention is to provide a coaxial connector that can prevent the risk of disconnection after mounting while satisfying the ease of mounting.

In order to achieve the above object, in the present invention,
A shell that holds the core wire protruding from the end of the coaxial cable and holds the coaxial cable in a central position in a state where the braid is folded back on the coating of the coaxial cable, and a cover that fixes the shell in the axial direction of the coaxial cable A coaxial connector having
A plurality of slits provided in the inner peripheral surface with a thread groove to be screwed with the screw groove of the plug seat, a tapered portion formed at the end portion of the outer peripheral surface, and extending in the axial direction from the distal end side to the proximal end side An external contact fitted on the outer periphery of the shell so that the open end can shrink in the radial direction;
The outer contact has a rib fitted into the slit of the external contact, is fitted on the outer periphery of the external contact, and slides in the axial direction on the outer periphery of the external contact, thereby forming a tapered portion of the external contact. A lock nut that can be pressed radially inward to shrink radially,
Coaxial connector, characterized by having
I will provide a.

  As described above, according to the present invention, the outer contact that is screwed into the plug seat by being contracted is fitted on the outer circumference of the shell holding the coaxial cable, and the lock nut is fitted on the outer circumference. Since the external contacts are contracted in the axial direction and rotated integrally with each other so that the screws of the plug seat and the coaxial connector are tightened with each other, they can be easily inserted into the plug seat and easily and securely connected. Can be tightened into the stopper seat.

The perspective view which shows the external appearance of one Example of this invention. FIG. 2 is a partially broken perspective view of the embodiment shown in FIG. 1. The element exploded perspective view of the Example shown in FIG. FIG. 2 is an end view of the embodiment shown in FIG. 1. 5 (a) and 5 (b) are partial cross-sectional views showing a state when the embodiment shown in FIG. 1 is inserted into and removed from the spigot and connected to the spigot. FIGS. 6 (a) and 6 (b) are partial cross-sectional views showing a state of the embodiment targeting a large-diameter cable when inserted into and removed from the plug seat and connected to the plug seat.

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

  FIG. 1 is a perspective view showing an appearance of an embodiment of the present invention, and this structure itself has a shape substantially similar to that of a general coaxial connector.

  That is, in this case, a 1.9C cable is used, but the coaxial connector 20 is attached to the end of the coaxial cable 10, and the central conductor 102 of the coaxial connector 20 is visible at the left end of the figure, and surrounds it. A cover 300 preferably made of resin is provided on the screw groove of the coaxial connector 20 and on the proximal end side of the coaxial connector 20.

  An external contact 210 and a lock nut 220 according to the present invention are fitted on the outer periphery of the left end of the coaxial connector 20 in the figure. Both of these are preferably made of metal, and the external contact 210 is an element for connecting the coaxial connector 20 to a plug seat (not shown), and has a thread groove with a slit on the inner periphery and an outer peripheral surface on the left side in the drawing. It has a tapered portion, is rotatably supported by the coaxial connector 20 and can be screwed into the spigot seat, and can contract in the radial direction using the width of the slit.

  On the other hand, the lock nut 220 is supported so as to be movable in the axial direction of the coaxial connector 20, and is pushed out in the left direction in the figure to push the tapered portion on the outer peripheral surface of the left end in the figure of the external contact 210 to contract radially inward. At the same time, it rotates together with the external contact 210 to tighten and connect the external contact 210 to a stopper seat (not shown).

  FIG. 2 shows the embodiment of which only the appearance is shown in FIG.

  In the coaxial cable 10, the end portion of the core wire 11 is exposed from the insulator 12 to solder the contact pin 102, and the braid 13 is folded on the cover 14.

  The coaxial cable 10 is inserted into the shell 110. The shell 110 holds a pin holder 101 made of an insulating material at the center on the left side of the figure, and holds the contact pin 102 at the center position of the pin holder 101. A braid 13 of the coaxial cable 10 is inserted on the right side of the shell 110 in the drawing, and is fixed and held at the center position.

  An outer contact 210 is fitted on the outer periphery of the shell 110 so as to be rotatable around the axis of the coaxial connector 20. The external contact 210 has a tapered portion 212 that is divided by four slits 211 in the circumferential direction on the left side in the figure, and the right side part in the figure can rotate around the axis of the coaxial connector 20 on the outer periphery of the shell 210. It is fitted.

  Further, a lock nut 220 is fitted on the outer periphery of the external contact 210. The left end of the external contact 210 and the lock nut 220 in the figure is fixed in the axial direction by a cover 300 engaged with the outer periphery of the shell 110 so as not to move in the axial direction.

  The lock nut 220 can be rotated around the axis of the coaxial connector 20 together with the external contact 210 as described later, and is supported so as to be movable in the axial direction with respect to the external contact 210. That is, when the flange 221 of the lock nut 220 is pushed toward the left side in the figure, the tapered portion 212 of the external contact 210 is pushed inward in the radial direction on the inner peripheral surface, and the thread groove provided on the inner peripheral surface of the external contact 210 Mate deeply with the screw groove on the spigot.

  Next, when the lock nut 220 and the external contact 210 are rotated around the axis of the coaxial connector 20 using the concave and convex portion 222 of the lock nut 220, the external contact 210 is also rotated together to form a plug seat (not shown). Screwed connection.

  FIG. 3 shows a shell 110, an external contact 210, a lock nut 220, and a cover 300 assembled at the end of the coaxial cable 10 as a partial cross-sectional view.

  Here, the following two points (a) and (b) are specifically shown.

  (a) The outer contact 210 is disposed on the outer periphery of the shell 110 and the lock nut 220 is disposed on the outer periphery of the external contact 210.

  (b) The ribs 223 provided on the inner periphery of the lock nut 220 are fitted into the slits 211 of the external contact 210 so that the lock nut 220 and the external contact 210 can rotate integrally and move in the axial direction. about.

  FIG. 4 is a left end view when the external contact 210 and the lock nut 220 of the embodiment shown in FIGS. 1 to 3 are combined, and the shell 110 is not shown. As shown in the figure, a rib 223 provided on the inner peripheral surface of the lock nut 220 is fitted into the slit 211 of the external contact 210. As a result, when the lock nut 220 is rotated in the circumferential direction of the coaxial connector, The external contact 210 also rotates integrally.

  FIGS. 5 (a) and 5 (b) show partial longitudinal cross sections when the connector seat 30 is inserted into and removed from the embodiment shown in FIGS. Here, it is shown that the lock nut 220 moves in the axial direction and how the left end of the external contact 210 is contracted accordingly.

  In FIG. 5A, the lock nut 220 is not separated from the cover 300, and the inner periphery on the left end of the lock nut 220 is in contact with the outer peripheral surface of the tapered portion 212 of the external contact 210. The left end of the external contact 210 protrudes from the left end of FIG.

  Accordingly, the slit 211 of the external contact 210 is not fully contracted, and the width direction of the contact pin 102 is drawn in the slit 211 so as to be seen as a whole.

  In FIG. 5B, the end face of the lock nut 220 and the external contact 210 are in the same position, and there is a gap between the right end of the lock nut 220 in the figure and the cover 300, and the inner peripheral face of the lock nut 220 Is in contact with the illustrated left end of the tapered portion 212 of the external contact 210.

  At this time, the screw groove on the inner peripheral surface of the external contact 210 is screwed with the screw groove on the outer peripheral surface of the stopper seat 30. The slit 211 of the external contact 210 is narrowed so as to hide many portions of the contact pin 102.

  FIGS. 6A and 6B show the same state as FIGS. 5A and 5B, except that the coaxial connector 20 is configured for a 5C cable thicker than a 1.9C cable. It is different in point. As a result, the lock nut 220 is formed in a hexagonal nut shape so that a tool can be used on the outer peripheral surface, and the cover 300 has a short axial length. Others have the same configuration as the above-described embodiment for the 1.9C cable.

Other examples

  The flange 221 and the concavo-convex portion 222 provided on the outer peripheral surface of the lock nut 220 are not clearly separated, and can be operated in both axial and circumferential directions, such as a tapered shape or a trumpet shape, which have a shape that can be easily hooked with a finger. It can be appropriately modified, for example, formed into a suitable shape.

  In addition, by making the inner diameter of the external contact 210 smaller than the outer diameter of the spigot seat, when the coaxial connector is attached to the spigot seat, it is possible to perform secure attachment using the fitting of the screw grooves. .

  In the case of a coaxial connector used for a large-diameter cable as shown in FIG. 6, it may be fixed by a caulking member from the radially outer side of the coating 14 of the coaxial cable 10 that covers the outer periphery of the shell 110.

10 coaxial cable, 11 core wire, 12 insulator, 13 braid, 14 sheath, 20 coaxial connector, 30 socket, 101 pin holder,
102 contact pin, 110 shell, 210 external contact,
211 slit, 212 tapered portion, 220 lock nut, 221 collar, 222 uneven portion, 223 rib, 300 cover.

Claims (4)

A shell that holds the core wire protruding from the end of the coaxial cable and holds the coaxial cable in a central position in a state where the braid is folded back on the coating of the coaxial cable, and a cover that fixes the shell in the axial direction of the coaxial cable A coaxial connector having
A plurality of slits provided in the inner peripheral surface with a thread groove to be screwed with the screw groove of the plug seat, a tapered portion formed at the end portion of the outer peripheral surface, and extending in the axial direction from the distal end side to the proximal end side An external contact fitted on the outer periphery of the shell so that the open end can shrink in the radial direction;
The outer contact has a rib fitted into the slit of the external contact, is fitted on the outer periphery of the external contact, and slides in the axial direction on the outer periphery of the external contact, thereby forming a tapered portion of the external contact. A lock nut that can be pressed radially inward to shrink radially,
A coaxial connector characterized by having In the coaxial connector according to claim 1,
The said lock nut has a collar for giving the acting force of an axial direction to an outer peripheral surface, The coaxial connector characterized by the above-mentioned. The coaxial connector according to claim 1, wherein
2. The coaxial connector according to claim 1, wherein the lock nut is provided with a concavo-convex portion for applying an acting force in the rotational direction on the outer peripheral surface. The coaxial connector according to claim 1, wherein
A coaxial connector characterized in that an inner diameter of the external contact is smaller than an outer diameter of the plug seat.

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