JP6627299B2 - Coaxial plug - Google Patents

Description

  The present invention relates to a coaxial plug such as an antenna plug connected to a television antenna, a receptacle on a television receiver side, and a jack.

  Conventionally, this type of coaxial plug has a center conductor in which the core wire of the coaxial cable is connected to the base end, an insulator arranged on the outer periphery of the center conductor, and an outer conductor arranged on the outer periphery of the insulator. When the braided conductor of the cable has a cylindrical outer conductor connected to the base end side and is connected to the receptacle, the center conductor is inserted into the center hole of the external thread portion of the receptacle, and the cylindrical outer conductor is connected to the receptacle. There is provided one that is fitted to a male screw portion (for example, see Patent Document 1). However, such a coaxial plug has a problem that the coaxial cable is easily pulled out of the receptacle when the coaxial cable is pulled, since the cylindrical outer conductor is merely fitted into the male screw portion of the receptacle.

  On the other hand, a female screw portion to be screwed with the distal end portion of the male screw of the receptacle is provided on the inner surface of the cylindrical outer conductor, and the leaf is similarly provided on the inner surface of the outer conductor between the female screw portion and the opening. A coaxial plug having a structure in which a plurality of springs are arranged in a circumferential direction and a male screw portion of a receptacle is sandwiched by the leaf springs has also been proposed (see Patent Document 2). However, such a screw-in type is not easy to attach and detach, and is troublesome. Also, the movement of the cable may cause the screw to be loosened easily, and if the screw is loosened, the screw may come off, the electrical contact may become unstable, and the quality may be degraded.

JP 2000-299173 A JP 2004-259462 A

  In view of the above situation, the present invention seeks to solve the problem by easily attaching and detaching operations, maintaining a reliable joining state that is difficult to pull out, and maintaining a stable state of electrical contact. An object of the present invention is to provide a coaxial plug that can improve the performance and quality.

  In order to solve the above-described problems, the present invention provides a center conductor to which a core wire of a coaxial cable is connected on a base end side, an insulator arranged on an outer peripheral side of the center conductor, and an insulator arranged on an outer peripheral side of the insulator. A coaxial plug coupled to a receptacle or a jack, the outer conductor being connected to the braided conductor of the coaxial cable on the base end side, wherein the outer conductor is supported on an outer peripheral portion of the insulator. A main body, and a connection piece that is cantilevered from the tubular main body toward the distal end and that can be elastically bent and deformed in and out.The connection piece is provided outside the outer conductor. An operation cylinder having a pressing protrusion for pressing inward and elastically deforming is mounted on the inner peripheral surface, and a screw groove portion on the outer peripheral surface of the receptacle or jack on the inner surface side of the connection piece by elastic deformation of the connection piece. Characterized in that it is provided with an engagement projection that engages with To constitute a lag.

  Here, it is preferable that the engagement protrusion is a ridge that is long in a spiral direction corresponding to a screw groove of the screw groove portion.

  With the coaxial plug according to the present invention as described above, the engagement protrusion can be engaged / disengaged with the screw groove portion only by operating the operation cylinder while being pushed into the receptacle or jack. Therefore, the attachment / detachment operation is easy, and a reliable joining state that is difficult to be pulled out by the engagement between the engagement protrusion and the screw groove portion is maintained, and the electrical contact property can be maintained in a stable state, and the reliability and quality are improved. Improvement can be achieved.

  In addition, since the engaging projection is a ridge that is long in the helical direction corresponding to the thread groove of the thread groove portion, the connection strength is improved, a more reliable joining state that is harder to pull out can be maintained, and the electric contact area increases. There is also an effect, and the reliability and quality can be further improved.

FIG. 1 is a perspective view showing a coaxial plug according to a first embodiment of the present invention. FIG. FIG. (A)-(c) is explanatory drawing which shows one division member which comprises an outer conductor. (A)-(c) is explanatory drawing which shows the other division member which comprises an outer conductor. (A) is a longitudinal sectional view showing a main part of the same coaxial plug, and (b) is a transverse sectional view. (A) is a longitudinal sectional view showing a main part of the same coaxial plug, and (b) is a transverse sectional view. Explanatory drawing of the principal part which similarly shows the connection state of a coaxial plug and a receptacle. The perspective view showing the coaxial plug concerning a 2nd embodiment of the present invention. FIG. FIG. FIG. 10 is a perspective view showing a coaxial plug according to a third embodiment of the present invention. FIG. FIG. The perspective view showing the coaxial plug concerning a 4th embodiment of the present invention. FIG. The perspective view showing the coaxial plug concerning a 5th embodiment of the present invention. FIG. FIG. Explanatory drawing which shows the process of the 2nd cylindrical body of the same coaxial plug similarly. Explanatory drawing which similarly shows a 2nd cylinder. Explanatory drawing which similarly shows the operation cylinder of a coaxial plug. The perspective view which shows the principal part of the same coaxial plug. FIG. 14 is an exploded perspective view showing a coaxial plug according to a sixth embodiment of the present invention. FIG.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a coaxial plug 1 according to the present invention is a straight-type coaxial plug that is pushed into a receptacle or a jack along a cable axial direction and is coupled thereto. In the following, an F-type coaxial plug (connector) compatible with an F-type receptacle and a jack will be described as an example, but other than the F-type coaxial plug of a coaxial cable coupled to a receptacle or a jack having a thread groove on the outer peripheral surface. Widely applicable.

  As shown in FIGS. 2 and 3, the coaxial plug 1 includes a center conductor 2 to which a core wire 11 of a coaxial cable 10 is connected on a base end side, and an insulator 3 arranged on an outer peripheral side of the center conductor 2. An outer conductor 4 disposed on the outer peripheral side of the insulator 3 and having the braided conductor 12 of the coaxial cable 10 connected to the proximal end side, the outer conductor 4 being supported on the outer peripheral portion of the insulator 3 It comprises a cylindrical main body 40 and a connecting piece 41 which is cantilevered from the cylindrical main body 40 toward the distal end and is elastically deformable inward and outward.

  The insulator 3 is made of a synthetic resin such as a polyethylene resin or a polytetrafluoroethylene resin, and the other center conductor 2 and the outer conductor 4 are preferably made of a metal such as brass or another copper alloy.

  On the outer side of the outer conductor 4, an operating cylinder 5 made of a synthetic resin or metal, which is provided with a pressing convex portion 51 for pressing the connecting piece 41 inward and elastically deforming the inner peripheral surface, is provided around the shaft. The connection piece 41 is provided rotatably, and an engagement projection 42 is provided on the inner surface side of the connection piece 41 to be engaged with the thread groove 15 on the outer peripheral surface of the receptacle or jack due to elastic deformation of the connection piece 41. Then, by simply rotating the operation tube 5 while the coaxial plug 1 is pushed into the receptacle 13, the connection piece 41 is pushed by the pushing protrusion 51 and elastically deformed as shown in FIGS. As a result, the engagement protrusion 42 is engaged with the screw groove portion 15, and the connection is completed.

  The center conductor 2 includes an insertion portion 20 into which the core wire 11 of the coaxial cable 10 is inserted at a base portion. The core wire 11 is inserted into the insertion portion 20, and the center conductor 2 and the core wire 11 are electrically connected by welding or the like. You. The center conductor 2 is held in a holding groove 30 formed in the center of the insulator 3. Such a center conductor 2 may have various known structures.

  The insulator 3 is a member that is interposed between the center conductor 2 and the outer conductor 4 and electrically insulates both from each other. The insulator 3 is housed inside the cylindrical main body 40 of the outer conductor 4 and is located at the center. The center conductor 2 is inserted into the holding groove 30 provided, whereby the center conductor 2 is held at the axial center position of the outer conductor 4. The insulator 3 is composed of split members 3A and 3B that are half-split in this example and are assembled to each other. The insulator 3 is held in the holding groove 30 formed in the joint surface, and the center conductor 2 is Hold in a stable position so that it cannot move in the direction.

  A plurality of connection pieces 41 of the outer conductor 4 project from the cylindrical main body 40 at predetermined intervals in the circumferential direction. The number of connecting pieces 41 is not particularly limited. The cylindrical main body 40 is formed of a pair of divided members 4A and 4B that are half-split and are assembled to each other in the same manner as the insulator 3. Each of the divided members 4A and 4B has a connecting piece 41 protruding in a cantilever shape toward the distal end side. 4 and 5 show the configuration of each of the division members 4A and 4B.

  The portion of each of the divided members 4A and 4B that constitutes the cylindrical main body 40 is a curved plate piece whose inner and outer surfaces are substantially arc-shaped around the axis and covers the insulator 3 in a sectional view as viewed from the axial direction. Reference numerals 47 and 48 in the figure denote engagement grooves and engagement claws for engaging and assembling with each other to form the cylindrical main body 40. In the present embodiment, it is composed of two divided members, but may be composed of three or more divided members.

  On the inner surface side of the connection piece 41, an engagement protrusion 42 is provided so as to be engaged with the thread groove portion 15 on the outer peripheral surface of the receptacle or jack due to elastic deformation of the connection piece 41. The engagement protrusion 42 is a long ridge in the spiral direction corresponding to the screw groove of the screw groove portion 15, that is, a long protrusion along the screw groove, and is provided at a position facing each other on the inner surface side of each connection piece 41. I have.

  By forming the engagement protrusion 42 as such a long protrusion, the connection strength is improved, and at the same time, the contact area with the screw groove portion 15 is increased, and the electrical connection effect can be improved. However, the shape is not limited to such a protrusion along the thread groove, and any other shape may be used as long as it engages with the thread groove portion 15 and does not come off in the axial direction. Further, in this example, the engaging projection 42 is easily and inexpensively configured by a cut-and-raised piece obtained by cutting and raising the portion of the connection piece 41 toward the inner surface side, but may be of another form.

  On the outer surface side of the outer conductor 4, a protrusion 43 for engaging with a guide groove 50, which will be described later, of the operation tube 5 and supporting the operation tube 5 to be rotatable within a predetermined angle range with respect to the outer conductor 4. Is provided. In the present example, the connecting piece 41 is provided on the outer surface side of the connecting piece 41, so that the operation tube 5 can be easily attached. Specifically, similarly to the above-described engagement projection 42, the connection piece 41 is formed by cutting and raising a predetermined portion of the connection piece 41 toward the outer surface side, but may be formed in another form.

  At least a region of the connection piece 41 having the engagement protrusion 42 is a curved plate piece whose inner and outer surfaces are substantially arc-shaped with the center of the axis as viewed in the axial direction and which covers the screw groove portion 15. The radius of curvature is set smaller than the radius of curvature of the outer peripheral surface of the thread groove portion 15. In addition, contacts 46 for electrical connection that contact the screw groove 15 are provided at both ends in the circumferential direction of the inner peripheral surface of the connection piece 41.

  The connection piece 41 is pressed by the pressing projection 51 of the operation cylinder 5 and elastically deforms so as to increase the radius of curvature, and the elastic restoring force causes the contact 46 to be pressed against the thread groove 15 with a strong force. The engagement protrusion 42 is provided at the center position of the connection piece 41, and when the connection piece 41 is released from connection with the receptacle 13, if the radius of curvature of the connection piece 41 becomes small, the engagement protrusion 42 moves in a direction in which the connection piece 41 is securely separated from the thread groove portion 15. The structure is such that the inconvenience that the protrusion 42 is hardly removed from the receptacle 13 by being caught by the screw groove of the screw groove portion 15 can be more reliably avoided.

  At the base end side of the connection piece 41 from the position pressed by the pressing protrusion 51, a neck portion 44 narrower than the width of the pressed position is provided. Therefore, elastic deformation to the inside of the connection piece 41 becomes easy, and the operability of the operation cylinder 5 can be lightly operated. In the present example, the neck 44 is connected to the cylindrical main body 40, but the present invention is not limited to this. The portion that is continuous with the neck may have a large width, and only the middle portion may have a narrow neck.

  Further, from the cylindrical main body portion 40 toward the base end side in the axial direction, the connection portion 45a to which the braided conductor 12 of the coaxial cable 10 is connected, and the aluminum laminate foil layer 14 below the braided conductor of the coaxial cable 10 or the lower portion thereof. A support piece 45 having a caulked portion 45b to be caulked is provided on the surface of the insulating layer. In this example, a support piece 45 is provided on one of the divided members 4A.

  The connecting portion 45a is formed of a U-shaped crimp terminal, and the braided conductors 12 pulled out from the end of the coaxial cable are bundled and arranged and connected by a pressing tool. However, other known connecting means such as soldering is used. Can be appropriately adopted. Outside the support piece 45, a cylindrical shielding material 6 whose base end is crimped to the outer surface of the coaxial cable 10 is arranged to improve electromagnetic shielding properties and noise reduction.

  An engagement groove 60 is provided on the distal end side of the shield member 6 so as to engage with a locking projection 49 formed on the outer peripheral surface of the outer conductor 4. Assembled in a stable position that is positioned with respect to each other. Reference numeral 8 denotes an end cover, which is provided over the outer surface of the coaxial cable, the outer peripheral surface of the shield member 6, and the outer peripheral surface of the tubular main body 40. The material is not particularly limited, such as synthetic resin, synthetic rubber, and metal.

  A total of two pressing projections 51 on the inner peripheral surface of the operation cylinder 5 are provided at positions corresponding to the connection pieces 41. A guide groove 50 extending in the circumferential direction for receiving the protrusion 43 is provided at an axial position corresponding to the protrusion 43 of the outer conductor 4 in the operation cylinder 5. In this example, guide grooves 50 having a predetermined length are formed at positions corresponding to the respective projecting portions 43. The range of guide angle of the projection 43 by each guide groove 50, that is, the range of rotation of the operation cylinder 5 determined by the range of movement of the projection 43 in the guide groove 50 in the circumferential direction is determined by the pressing protrusion 51. The range includes a position where the connecting piece 41 is elastically deformed by pressing the connecting piece 41 inward and a position where the connecting piece 41 is not pressed inward.

  In this example, the pressing operation is performed by rotating the operation cylinder 5 from the position shown in FIG. 6 where the protrusion 43 contacts one end of the guide groove 50 to the position shown in FIG. 7 where the protrusion 43 contacts the other end. The protruding portion 51 largely elastically deforms the connection piece 41 inward. As a result, the engagement protrusion 42 is engaged with the thread groove 15. Further, by rotating the operating cylinder 5 from this position to the position shown in FIG. 6 where the protrusion 43 abuts one end of the guide groove 50, the elastic deformation of the connection piece 41 due to the pressing protrusion 51 is restored. The engagement state of the engagement protrusion 42 is released. By setting the positions of both ends of the guide groove 50 to the lock / release position in this manner, the operability of the operation cylinder 5 is improved.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  The coaxial plug 1A of the present embodiment is configured as an L-type coaxial plug that is pushed into a receptacle or the like in a direction perpendicular to the cable axis and coupled to a receptacle or the like, in contrast to the straight type of the first embodiment. . The support piece 45 supported by the coaxial cable 10 of the divided member 4 </ b> A of the outer conductor 4 is configured to be bent about 90 degrees outward from the base end side of the tubular main body 40. Other configurations such as the connection portion 45a and the swaged portion 45b of the support piece 45, the connection piece 41 of the outer conductor 4, the engagement protrusion 42, and the like are the same as those in the above-described first embodiment.

  In the center conductor 2 to which the core wire 11 of the coaxial cable 10 is connected, the insertion portion 20 on the base end side is also opened in a direction of about 90 degrees. The shield member 6 includes a main body 61 that is provided outside the cylindrical main body 40 of the outer conductor 4, and a fixing part 62 that extends from a side of the main body and is fixed to the outer cover of the coaxial cable 10.

  The end cover 8 is fixed to a base end side cover portion 81 fixed to the outside of the fixing portion 62 of the coaxial cable 10 and the shield member 6, and is fixed to the outside of the cylindrical main body portion 40 and the main body portion 61 of the shield member 6. It is configured in a substantially L-shape with the distal end side cover portion 82. The base-side cover portion 81 and the distal-side cover portion 82 are formed of independent members assembled to each other, and the distal-side cover portion 82 is further formed of two half-shaped mutually assembled members.

  Other configurations and modifications are basically the same as those of the first embodiment, and the same structures are denoted by the same reference numerals and description thereof will be omitted.

  Next, a third embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 13, the coaxial plug 1 </ b> B of the present embodiment includes a center conductor 2 to which the core wire 11 of the coaxial cable 10 is connected to the base end and an outer periphery of the center conductor 2, as in the first embodiment. The insulator 3 to be arranged, the outer conductor 4 which is arranged on the outer peripheral side of the insulator 3 and the braided conductor 12 of the coaxial cable 10 is connected to the base end side, and the connection piece 41 of the outer conductor 4 are moved inward. The operating cylinder 5 is provided with a pressing convex portion 51 for pressing and elastically deforming the operating cylinder 5 protruding from the inner peripheral surface.

  The insulator 3 is made of a synthetic resin such as a polyethylene resin or a polytetrafluoroethylene resin, and the other center conductor 2 and the outer conductor 4 are preferably made of a metal such as brass or another copper alloy. The material of the operation cylinder 5 is not particularly limited, and is made of synthetic resin, metal, or the like.

  The outer conductor 4 has a cylindrical main body portion 40 supported on the outer peripheral portion of the insulator 3 and a cantilever-like connection protruding from the cylindrical main body portion 40 toward the distal end, and is elastically deformable inward and outward. And a piece 41. In the present embodiment, the operation tube 5 is provided so as to be slidable in the axial direction with respect to the outer conductor 4. Thus, the connection is completed with one touch only by inserting the coaxial plug 1B into the receptacle and moving the operation tube 5 to the distal end side.

  As shown in FIG. 14, the connection piece 41 has an outwardly expanding shape that is located farther away from the central axis of the tubular main body 40 as it moves toward the distal end. Causes the connection piece 41 to elastically deform inward and engage with a thread groove such as a receptacle (not shown), thereby being locked. A plurality of connection pieces 41 are protruded from the cylindrical main body 40 at predetermined intervals in the circumferential direction.

  Each connection piece 41 is formed of a plate material having an arc shape in cross section. The engagement projection 42 is a ridge having a length extending in the spiral direction and over the entire width of the connection piece 41, and is formed on the inner peripheral surface of the connection piece 41 along the axial direction at the same interval as the interval between the thread grooves of the thread groove portion 15. A plurality of them are protruded. Thereby, the coaxial plug 1B and the receptacle 13 are connected more firmly and reliably. Such a connection piece 41 can be easily manufactured by cutting. The pressing convex portion 51 of the operation cylinder 5 is formed of an annular ridge that covers the entire inner peripheral surface of the operation cylinder 5. Thereby, the plurality of connection pieces 41 can be elastically deformed inward at the same time.

  On the outer peripheral surface of the distal end portion of the connection piece 41 and the outer peripheral surface of the base end portion or the cylindrical main body portion, there are provided stepped portions 4a and 4b which bulge outward, respectively. The outer peripheral surface of the connection piece 41 can be moved in the axial direction while being fitted between the step portions 4a and 4b. The operation cylinder 5 is provided so as to be movable in the axial direction on the outer peripheral surface of the connection piece 41 within the range of movement of the pressing projection 51.

  Further, a connection tube 70 inserted between the braided conductor 12 of the coaxial cable 10 and the insulating layer 16 or the laminated foil layer inside the braided conductor 12 protrudes from the cylindrical main body 40 toward the base end side in the axial direction. I have. The braided conductor 12 is connected to the outer peripheral side of the connection tube 70 in a crimped state. Thereby, the braided conductor 12 can be easily connected without performing soldering or caulking.

  In the present embodiment, the cylindrical main body 40 is configured by two internal and external double layers. Specifically, the connection piece 41 is first formed integrally, and the inner cylinder 4C that is provided on the insulator 3 and the connection cylinder 70 that is integrally formed on the base end side. And an outer cylindrical body 4D that is externally provided. Although the cylindrical main body 40 can be integrally formed by one member, the inner conductor 2 and the insulator 3 can be assembled by combining the inner and outer double cylinders 4C and 4D as in this example. It becomes an easy structure.

  A bulging portion 71 bulging outward is provided at a distal end portion of the outer cylindrical body 4D, and the bulging portion 71 constitutes the step portion 4a. The tip of the outer cylinder 4D attached to the outer surface of the inner cylinder 4C constitutes a step 4b. The operation cylinder 5 is provided so that the inner peripheral surface except for the pressing convex portion 51 is slidable on the outer surface of the outer cylindrical body 4D in the axial direction. Outside the outer cylindrical body 4D, a cylindrical metal end cover 8 whose base end portion 80 is fixed by caulking to the outer peripheral surface of the coaxial cable 10 is provided.

  Next, a fourth embodiment of the present invention will be described with reference to FIGS.

  The coaxial plug 1C of the present embodiment is configured as an L-shaped coaxial plug that is pushed into a receptacle or the like in a direction perpendicular to the cable axis and coupled to the receptacle or the like, in contrast to the straight type in the third embodiment. . The outer cylindrical body 4D of the outer conductor 4 has a distal end side mounted on the outer side of the base end of the inner cylindrical body 4C similarly to the third embodiment, and a cylindrical main body 72 that forms the cylindrical main body 40 together. A cylindrical connecting portion 73 which is mounted so that an internal space communicates with an opening formed in a side wall portion on the base end side of the cylindrical main body 72 and has a connecting tube 70 extending laterally at an end portion; Further, a cover 74 for closing the base end of the cylindrical main body 72 is provided.

  The end cover 8 is attached while being supported on the outer surface of the large-diameter portion 73a on the connection portion side of the tubular connection portion 73 with the tubular main body 72. The center conductor 2 to which the core wire of the coaxial cable is connected is formed in a substantially L-shape in which the insertion portion 20 on the base end side is opened to the side so that the axis coincides with the cylindrical connection portion 73. Other configurations and modifications are basically the same as those of the third embodiment, and the same structures are denoted by the same reference numerals and description thereof will be omitted.

  Next, a fifth embodiment of the present invention will be described with reference to FIGS.

  As shown in FIGS. 17 to 19, the coaxial plug 1 </ b> D of the present embodiment includes a center conductor 2 to which the core wire 11 of the coaxial cable 10 is connected to the base end, as in the first embodiment and the third embodiment. An insulator 3 disposed on the outer peripheral side of the center conductor 2, an outer conductor 4 disposed on the outer peripheral side of the insulator 3, and a braided conductor 12 of a coaxial cable connected to a base end side; The operating cylinder 5 is provided with a pressing convex portion 51 that presses the connecting piece 41 inward and elastically deforms the connecting piece 41 so as to protrude from the inner peripheral surface.

  The coaxial plug 1D is a further modification of the coaxial plug 1B of the third embodiment. The operation of the coaxial plug 1B of the third embodiment is basically the same as that of the first embodiment, only by inserting the coaxial plug 1B into the receptacle or jack and operating the operation cylinder 5, and the connection piece 41 is moved inward. The connection is completed with a single touch by being pressed by the engaging projections 42 on the inner peripheral surface into the thread grooves on the outer peripheral surface of the receptacle or jack, but the outer conductor 4 and the end cover 8 are further held by hand. By tightening the connection piece to the root of the screw groove portion, a stronger connection state can be obtained.

  However, at this time, the coaxial cable is loosened due to a restoring force that tends to return to its original state, and in the case of an L-shaped cable, the direction of the coaxial cable after being tightened is not determined, and the usability is deteriorated. Therefore, in the present embodiment, the connection piece 41 and the operation tube 5 are positioned relative to the center conductor 2, the insulator 3, and the connection tube 70 at least on the base end side of the outer conductor 4. It is configured to be rotatable.

  With this configuration, the operating cylinder 5 is moved in the axial direction to press the connecting piece 41 inward, and the engaging protrusion 42 of the connecting piece 41 is engaged with the screw groove portion. By rotating the shaft 5 around the axis, the connection piece 41 rotates integrally therewith, and can be tightened to the root of the thread groove. At this time, since the coaxial cable does not rotate, twisting of the cable is prevented, and the direction in which the cable extends can be determined in advance even in the case of the L-shaped cable.

  As shown in FIGS. 18 and 19, the outer conductor 4 that constitutes the coaxial plug 1 </ b> D of the present embodiment includes a cylindrical main body 40 supported on the outer peripheral portion of the insulator 3, and a distal end extending from the cylindrical main body 40. A connection piece 41 is provided protruding in a cantilever shape toward the side and elastically deformable inward and outward. The cylindrical main body 40 includes a first cylindrical body 4E fixed to the outer peripheral portion of the insulator 3 and a distal end of the first cylindrical body 4E, which is relatively rotatable around the axis and relatively moved in the axial direction. The second cylindrical body 4F is integrally formed with the connecting piece 41 at the distal end side of the second cylindrical body 4F.

  In this example, a notch groove 47 that is opened to the tip opening is provided on the inner peripheral surface of the tip of the first cylinder 4E, and the second cylinder is formed inside the notch groove 47 with a minute gap therebetween. The cylindrical body 48F on the base end side of the 4F is inserted, and the circumferential grooves 47c, 48c facing each other are formed on the inner circumferential surface of the cutout groove 47 and the outer circumferential surface of the cylindrical body 48F of the second cylindrical body 4F. Are respectively provided, and are engaged with each other so as to be relatively rotatable about the axial center and relatively immovable in the axial direction through a locking ring 91 mounted in a space between the peripheral grooves 47c and 48c. In this example, the locking ring 91 has a C shape with a rectangular cross section, but is not limited thereto.

  The first cylindrical body 4E includes a cylindrical main body 48E on the distal end side fixed to the outer peripheral portion of the insulator 3, and a connecting cylinder 70 integrally extended to the base end side of the cylindrical main body 48E. A notch groove 47 having the peripheral groove 47c is formed on the inner peripheral surface of the distal end of the cylindrical main body 48E. The cylindrical main body 48F of the second cylindrical body 4F is rotatable relative to the cylindrical main body 48E of the first cylindrical body 4E via the locking ring 91 as described above, and is relatively immovable in the axial direction. Have been combined. The outer conductor 4 is constituted by the first cylinder 4E and the second cylinder 4F.

  The cylindrical main body 48F of the second cylindrical body 4F is loosely fitted in an annular cutout groove 31 formed on the outer peripheral surface of the distal end portion of the insulator 3, thereby being configured to be able to perform the relative rotation in a stable posture. ing. As shown in FIGS. 20 and 21, the connection piece 41 formed on the second cylindrical body 4F is provided with a slit-shaped equally-spaced gap s1 in the circumferential direction from the distal end of the cylindrical main body 48F. A plurality of them extend toward the tip side in the axial direction.

  The operating cylinder 5 slides on the outer surface of the first cylindrical body 4E and the outer peripheral surface of the end cover 8 which is substantially flush with the outer surface of the first cylindrical body 4E except for the pressing convex portion 51 provided on the distal end side. Thus, the outer casing is slidable in the axial direction with respect to the first cylinder 4E and rotatable about the axis. As shown in FIG. 22, an annular bulge 53 is formed on the outer peripheral surface on the base end side so as to be easily gripped.

  Further, the operation cylinder 5 is provided with a projection 52 that engages with the slit-shaped gap s1 between the plurality of connection pieces 41 of the second cylinder 4F. As the protrusion 52 is guided in the gap s1 in the axial direction, as can be seen from FIG. 23, the operating cylinder 5 is slidable in the axial direction with respect to the second cylindrical body 4F, and the axial center is Is mounted so that relative rotation is impossible.

  As shown in FIG. 18, a bulging portion 71 bulging outward is provided at the tip of the second cylindrical body 4F, that is, at the tip of the connecting piece 41. The stepped portion 4a is configured to stop the pressing convex portion 51 of the cylinder 5 to stop the operation cylinder 5 from moving toward the distal end. The opening end of the notch groove 47 at the tip of the cylindrical main body 48E of the first cylindrical body 4E also abuts the pressing convex portion 51 of the operating cylinder 5 to move the operating cylinder 5 toward the base end. The regulating step 4b is formed. By sliding the operation tube 5 in the axial direction in this manner, the pressing convex portion 51 moves in the axial direction on the outer peripheral surface of the connecting piece 41 between the step portions 4a and 4b.

  Each connection piece 41 is made of a plate material having an arc shape in cross section as in the third embodiment. As can be seen from FIG. 20, the outer peripheral surface of each connecting piece 41 has a shape that bulges outward toward the distal end, and is pressed inward by the pressing convex portion 51 moving toward the distal end, so that it is elastically deformed. Is configured. In this example, such a swelling shape is realized by forming the outer peripheral surface into a thick-walled shape that bulges outward toward the distal end side. For example, the connection piece 41 is plastically deformed into a curved shape by press working. It is also possible to realize the combination of such a thick shape and press working.

  Further, in this example, the entire connection piece 41 is configured to have the above-mentioned swelling shape, but is not limited to this. The connecting piece 41 may be elastically deformed in and out by moving the pressing protrusion 51 of the operating cylinder 5 while abutting on the tip of the protrusion.

  As described above, the operation tube 5 is slid in the axial direction with respect to the first cylinder 4E and the second cylinder 4F, thereby elastically deforming the connection piece 41 of the second cylinder 4F inward and outward. In this state, the operating cylinder 5 can be engaged with the second cylindrical body 4F together with the second cylindrical body 4F in a state where the operating cylinder 5 is moved to the distal end. By rotating about the center, the connection piece 41 in which the engagement protrusion 42 is engaged with the thread groove can be tightened / loosened to the root of the thread groove of the receptacle or jack without rotating the coaxial cable. Have been. However, in the case of loosening, the engagement with the thread groove can be released by moving the operation cylinder 5 to the proximal end without rotating the operation cylinder 5 in this way.

  The engaging projection 42 is not provided with a ridge having the same pitch as the thread groove of the receptacle or jack on each connection piece 41 continuously as in the third embodiment. When the ridges having the same pitch are formed continuously as in the third embodiment, if the axis of the coaxial plug and the axis of the receptacle or jack are slightly displaced, the threads may interfere with each other somewhere in the circumferential direction, and smooth. When the coaxial cable is shaken in an incompletely engaged state, the cable may gradually come off.

  On the other hand, in the present embodiment, as shown in FIG. 20, at the same axial position of each connecting piece 41, the circumferential width of the connecting groove 41 is approximately one pitch of the thread groove and perpendicular to the axial direction. A ridge 90 extending in the direction is provided, and a screw to be screwed into the screw groove is formed on the ridge 90. According to this, only a part of the connection piece 41 forms a complete thread on the ridge portion 90, and a thread or valley partly missing on the other connection piece 41 is formed. Therefore, even when the axis of the coaxial plug and the axis of the receptacle or jack are slightly displaced during connection, the threads can be smoothly engaged without interference.

  Further, in this example, such connecting strips 41 are provided with such ridges 90 at the same axial position at two positions at 1.5 pitch intervals, and screwed into the screw grooves with the two ridges 90. The engaging protrusion 42 is formed by engraving a screw to be formed. According to this, the connection pieces 41 in which substantially complete threads are formed by the ridges 90 at the respective axial positions become connection pieces 41 at positions symmetrical to each other with respect to the axis, and the screw groove of the receptacle or jack is formed. , A stable engagement state can be obtained.

  In this example, the interval along the axial direction of the ridges 90, 90 formed on each connection piece 41 is set to 1.5 pitches, but it is also possible to use 2.5 or 3.5 pitches apart. Good. If the interval is 1 + 0.5 × n (n is an integer of 1 or more) pitch, a similar configuration can be obtained theoretically. Further, in this example, the ridge portions 90 are provided at two places (two places), but it is also possible to provide three or more places. However, when almost complete threads are formed in all the connection pieces 41, the possibility of the above-described interference increases.

  It is preferable that the ridge portion 90 be provided in a region closer to the front end than the center of the connection piece 41. If it is closer to the base end than the center, it is difficult to disengage and disengage due to elastic deformation. If the interval between the ridges 90, 90 increases, the ridge on the base end side will be disposed at a position closer to the base end, so it is preferable to keep the interval at 3.5 pitches or less. . Other configurations and modifications are basically the same as those of the third embodiment, and the same structures are denoted by the same reference numerals and description thereof will be omitted.

  Next, a sixth embodiment of the present invention will be described with reference to FIGS.

  The coaxial plug 1E of the present embodiment is configured as an L-type coaxial plug that is pushed into a receptacle or the like in a direction perpendicular to the cable axis and coupled to the receptacle or the like, in contrast to the straight type of the fifth embodiment. . The first cylindrical body 4E and the second cylindrical body 4F constituting the outer conductor 4 are configured to be relatively rotatable via a locking ring 91, as in the fifth embodiment.

  The first cylindrical body 4E is mounted so that an internal space communicates with a cylindrical main body 72E constituting the cylindrical main body 40 and an opening formed in a side wall on the base end side of the cylindrical main body 72E. A cylindrical connecting portion 73E having a connecting tube 70 extending laterally at an end thereof is provided, and a cover 74E for closing a base end of the cylindrical main body 72E is provided.

  The end cover 8 is attached while being supported on the outer surface of the large-diameter portion 73a on the connection portion side of the cylindrical connection portion 73E with the cylindrical main body 72E. The center conductor 2 to which the core wire of the coaxial cable is connected has a concave groove which is opened laterally as the insertion portion 20 on the base end side so that the axis is aligned with the cylindrical connection portion 73. Other configurations and modifications are basically the same as those of the fifth embodiment, and the same structures are denoted by the same reference numerals and description thereof will be omitted.

  As described above, the embodiments of the present invention have been described. However, the present invention is not limited to the embodiments, and it is needless to say that the present invention can be implemented in various forms without departing from the gist of the present invention.

1, 1A, 1B, 1C Coaxial plug 1D, 1E Coaxial plug 2 Center conductor 3 Insulator 3A, 3B Dividing member 4 Outer conductor 4A, 4B Dividing member 4C Inner tube 4D Outer tube 4E, 4F Tube 4a, 4b Step Part 5 Operating cylinder 6 Shielding material 8 End cover 10 Coaxial cable 11 Core wire 12 Braided conductor 13 Receptacle 14 Aluminum laminated foil layer 15 Screw groove 16 Insulation layer 20 Insertion part 30 Holding groove 31 Notch groove 40 Cylindrical body part 41 Connection piece 42 Engagement projection 43 Projection part 44 Neck part 45 Support piece 45a Connection part 45b Caulking part 46 Contact 47 Notch groove 47c, 48c Peripheral groove 48E, 48F Cylindrical body 49 Locking convex part 50 Guide groove 51 Pressing convex part 52 Projection 53 Swelling part 60 Engagement groove 61 Body part 62 Fixing part 70 Connection tube 71 Swelling part 72 Cylindrical body 72E Cylindrical body 73 Cylindrical connecting portion 73E Cylindrical connecting portion 73a Large diameter portion 74 Cover 74E cover 80 Base end portion 81 Base end side cover portion 82 Front end side cover portion 90 Protrusion portion 91 Locking ring s1 Gap

Claims (1)

A center conductor to which the core wire of the coaxial cable is connected to the base end, an insulator disposed on the outer periphery of the center conductor, and an outer conductor disposed on the outer periphery of the insulator, and the braided conductor of the coaxial cable is disposed on the base end; An outer conductor to be connected, and a coaxial plug coupled to the receptacle or jack,
Said outer conductor,
A tubular main body supported on the outer periphery of the insulator;
The tubular main body portion is provided with a cantilever protruding toward the distal end side, and comprises a connection piece that can be elastically bent and deformed in and out.
The cylindrical main body portion is engaged with a first cylindrical body fixed to an outer peripheral portion of the insulator and a distal end portion of the first cylindrical body so as to be relatively rotatable about the axis and relatively immovable in the axial direction. A second cylindrical body, wherein the connecting piece is integrally formed on the distal end side of the second cylindrical body,
On the outer side of the outer conductor, a pressing projection that presses the connection piece inward and elastically deforms is mounted with an operation cylinder protruding from an inner peripheral surface,
The operation cylinder is provided so as to be axially slidable with respect to the first cylinder and rotatable about an axis, and is also slidable with respect to the second cylinder in the axial direction. It is mounted on the center so that it can not rotate relatively,
A coaxial plug, wherein an engagement projection is provided on an inner surface side of the connection piece so as to be engaged with a thread groove on an outer peripheral surface of a receptacle or a jack by elastic deformation of the connection piece.

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