JPH0212703Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to a coaxial cable connector, and relates to a holding structure for an insulating bushing that holds contacts in a connector used for a receiver/transmitter, etc. .

(Prior art) This type of conventional coaxial cable connector has a first
As shown in Fig. 1, the contact 1 is inserted into and engaged with the engagement groove 3a formed in the axial insertion hole 3 of the cylindrical insulating bushing 2 for holding the contact, and the insulating bushing 2 into which the contact 1 is inserted is inserted into the engagement groove 3a. cover 4
A structure was adopted in which the insulating bush 2 inserted into the cover 4 was held by caulking. In this conventional structure, the insertion hole 3 of the insulating bushing 2 is opened only at one end, and the plug pin insertion hole 5 is opened at the other end, and the tip of the contact 1 inserted into the insertion hole 3 is inserted into the insertion hole 3. Although it is held at the end, the insertion hole 3
In order to hold the contact 1 from the open end so that it does not come off, another insulating bushing 6 is required to prevent it from coming off, and this insulating bushing 6 has an insertion hole 7 through which only the conductor connection portion 1a of the contact 1 can be inserted. However, this insulating bushing 6 is used to prevent the contact 1 from coming off.

Note that a thread groove 4a is formed on the outer periphery of the cover 4, into which a flange 8 and a nut 9 are screwed together to attach the cover 4 to a base.

Furthermore, as described in Japanese Utility Model Application Publication No. 57-67383, a structure is known in which an insulating bushing divided into two parts is fitted into a cylindrical cover, and a contact is fitted into both of the insulating bushings.

(Problems to be solved by the invention) In the above-mentioned conventional coaxial cable connector, the contact 1 is held between two insulating bushings 2 and 6, which requires a large number of parts and a large number of assembly steps. This has the problem of poor performance and high cost.

Furthermore, in the connector described in the above-mentioned Japanese Utility Model Publication No. 57-67383, the insulating bushing is composed of two parts, so there are a large number of parts and assembly is time-consuming, and there is no means for preventing rotation of the insulating bushing and cover. ,
There is a problem that alignment cannot be performed.

The present invention was developed in view of the above-mentioned problems, and allows the contact to be held in a single insulating bushing. Also, the cover, insulating bushing, and contact can be reliably prevented from rotating, making positioning easy, and reducing the number of parts. It is an object of the present invention to provide a coaxial cable connector that can be reduced in size, has improved assembly efficiency, and has good productivity.

[Structure of the idea]

(Means for Solving the Problems) The coaxial cable connector of the present invention consists of a contact 11, an insulating bush 17, a cylindrical cover 27, and a base 34, and the contact 11 has a plug contact piece 12 on one end side. The insulating bushing 17 is formed into a substantially cylindrical shape, and has a tapered surface 24 that expands downward at the lower end of the outer periphery, and a connecting piece 15 at the other end. A diametrical engagement groove that forms an engagement step 25 and has insertion holes 18 and 19 passing through in the axial direction, and that inserts and holds the contact 11 from the lower end to the middle part with the insertion holes 18 and 19 in between. 21, the lower end of the engagement groove 21 communicates from the inner circumference to the outer circumference of the insertion holes 18, 19, and a deformed surface 26 parallel to the engagement groove 21 is formed at the lower end of the outer circumference, The cylindrical cover 27 is electrically conductive and has a fitting hole 28 for inserting and holding the insulating bushing 17 extending therethrough in the axial direction. A projecting edge 29 is provided on the inner peripheral surface of the cover 27 to form a matching irregularly shaped engagement surface 30 and to engage the engagement step 25 of the insulating bushing 17 inserted from below. A mounting hole 35 is formed through the upper and lower surfaces for attaching the insulating bushing 17, and the mounting hole 35 forms an irregularly shaped engaging surface 39 that matches the irregularly shaped outer peripheral engaging surface 30 of the cover 27. The contact 1 from below
1 from the plug contact piece 12 side, and press-fit this insulating bushing 17 into the fitting hole 28 from below by aligning the irregularly shaped surface 26 with the irregularly shaped engaging surface 30 of the cover 27. The engaging stepped portion 25 of the insulating bushing 17 is engaged with the protruding edge 29 of the cover 27, and the tapered surface 24 of the insulating bushing 17 is inserted into the fitting hole 2 of the cover 27.
8 and tighten this cover 27 to the mounting hole 35 of the base 34 with the irregularly shaped engagement surface 30 of the cover 27.
This feature is characterized in that the and irregularly shaped engaging portions 39 are inserted together.

(Function) In the coaxial cable connector of the present invention, the contact 11 is inserted from below into the engagement groove 21 of the insulating bushing 17 from the plug contact piece 12 side, and the insulating bushing 17 is inserted into the engagement groove 21 of the insulating bushing 17 so that the irregularly shaped surface 26 is engaged with the irregularly shaped surface 26 of the cover 27. Press fit into the fitting hole 28 from below in alignment with the surface 30,
This insulating bushing 17 is covered with a cover 2.
7, the tapered surface 24 of this insulating bushing 17 is tightened in the fitting hole 28 of the cover 27, and the contact 11 engaged in the engagement groove 21 of this insulating bushing 17 is tightened. This cover 27 is inserted into the mounting hole 35 of the base 34 with the irregularly shaped engaging surface 30 and irregularly shaped engaging portion 39 of the cover 27 aligned, and the insulating bushing 17 and the cover 27 are held in place so as not to rotate.

(Embodiment) The configuration of an embodiment of the present invention is shown in drawings 1 to 10.
The diagram will be explained.

11 is a contact, which is molded from a conductive plate material as shown in FIG. 8, and has a plug contact piece 12 on one end side.
A plug pin engaging groove 13 is formed which is open at the tip, and contact portions 14 having a reduced width are formed protruding from the tip ends of both edges of the plug pin engaging groove 13. Further, on the other end side of this contact 11, a connecting piece 15 of a conducting wire extends linearly. Furthermore, stopper protrusions 16 are formed protrudingly on both sides of the intermediate portion of the contact 11.

Further, 17 is an insulating bushing, as shown in FIGS. 5 to 7, which is molded into a substantially cylindrical shape from an insulating material such as synthetic resin. This insulating bushing 17 has an upper insertion hole 18 that passes through the center in the axial direction and has a smaller diameter on the upper end side, and an upper insertion hole 19 that has a larger diameter on the lower side and communicate with each other via a reduced diameter step part 20. , and an engagement groove 21 in the diametrical direction across the insertion holes 18 and 19.
A lower end portion of the engaging groove 21 is open for communication from the inner periphery to the outer periphery to form a divided cylindrical portion 22. Further, a stopper stepped portion 23 whose upper side is reduced in width is formed in the middle portion of the engagement groove 21 . Furthermore, the lower part of the outer periphery of the insulating bushing 17 is formed with a tapered surface 24 that expands downward, and the lower end of the outer periphery is formed with a deformed surface 26 that is parallel to the engagement groove 21.
An engaging stepped portion 25 is formed at an intermediate portion of the outer periphery of the engaging step portion 25 located toward the upper portion.

Next, reference numeral 27 denotes a cover, which is molded into a substantially cylindrical shape from a conductive metal material, and has a fitting hole 28 formed therethrough in the axial direction into which the insulating bushing 17 is fitted, as shown in FIGS. 3 and 4. An annular protrusion 29 is formed in the middle of the fitting hole 28 to engage the engagement step 25 of the insulating bushing 17. The lower inner and outer surfaces of the fitting hole 28 of this cover 27 have irregularly shaped engagement surfaces 30 that match the irregularly shaped surface 26 of the insulating bushing 17.
is formed. Further, a guide protrusion 31 is protruded from the lower outer circumference of the cover 27, and an earth contact locking groove 32 is formed on both sides of the guide protrusion 31. An annular mounting collar 33 is located above the locking groove 32. is formed.

Next, reference numeral 34 denotes a mounting base, which is molded into a plate shape from an insulating material as shown in FIGS. A positioning recess 36 is cut out on one side of the mounting hole 35. Further, an annular projection 37 into which the mounting collar 33 fits is formed around the mounting hole 35 on the upper surface of the base 34, and an annular projection 38 is formed on the lower surface from the periphery of the mounting hole 35. There is. Further, the mounting hole 35 of the base plate 34 is formed with an irregularly shaped engagement portion 39 that matches the outer peripheral irregularly shaped engagement surface 30 of the cover 27 .

Reference numeral 40 denotes a ground contact, and this ground contact 40 is formed in a substantially L-shape as shown in FIGS. 9 and 10, and has an engaging piece 41 formed in two concave arc shapes on one side. However, this engaging piece portion 41 is adapted to be engaged with the locking groove 32 of the cover 27. Further, a notch 42 is formed in the middle portion of this engaging piece portion 41 in which the guide protrusion 31 of the cover 27 is positioned.

Further, the other side of this ground contact 40 serves as a connection portion 44 .

A caulking step portion 45 having a reduced diameter is formed at the lower end of the insulating bushing 17.

Next, a method of assembling this embodiment will be explained.

First, the contact 11 is inserted from below into the engagement groove 21 of the insulating bushing 17 from the plug contact piece 12 side, and the stopper protrusion 16 of the contact 11 is engaged with the stopper stepped part 23 of the insulating bushing 17. Next, this contact 11 is inserted, and the insulating bushing 17 is inserted and fitted into the fitting hole 28 of the cover 27 from below. At this time, the irregularly shaped surface 26 of the insulating bush 17 and the irregularly shaped engaging surface 30 of the cover 27 are aligned and fitted. Then, when the insulating bushing 17 is press-fitted until the engaging stepped portion 25 of the insulating bushing 17 engages with the protrusion 29 of the cover 27, the insulating bushing 17
The tapered surface 24 of the insulating bushing 17 is crimped into the fitting hole 28 of the cover 27, and the divided cylindrical parts 22, 22 of the insulating bushing 17 are connected to each other.
are tightened together, and the contact 11 held in the engagement groove 21 is firmly clamped. Then, the lower end of the cover 27 is caulked to the caulking step 45 of the insulating bushing 17 to prevent it from coming off.

Next, the cover 27 fitted with the insulating bush 17
When the guide protrusion 31 is inserted into the mounting hole 35 of the base plate 34 from the upper surface side by aligning it with the positioning recess 36, the irregularly shaped engaging surface 30 of the cover 27 and the irregularly shaped engaging part 39 match, and the mounting collar 33 of the cover 27 becomes a projection. 37. The cover 27 engages the guide protrusion 31 with the positioning recess 36 and the irregularly shaped engagement surface 30.
Rotation is prevented by engagement with the irregularly shaped engaging portion 39.

Next, when the engagement piece 41 of the ground contact 40 is engaged with the locking groove 32 of the cover 27 from the bottom side of the base 34, the cover 27 clamps the base 34 between the mounting collar 33 and the ground contact 40, and the base 34 is closed.
mounted on. Note that at this time, the guide protrusion 31 is positioned in the notch 42 of the earth contact 40.

Note that this coaxial cable connector is not limited to the BNC type that does not have a screw formed on the outer upper part of the cover 17 as shown in the above embodiment, but is also applicable to an F type connector that has a screw formed on the outer upper part of the cover 17. It is possible.

[Effect of idea]

The present invention consists of a contact 11, an insulating bush 17 for inserting and holding the contact 11, and a conductive cylindrical cover 27 for inserting and holding the insulating bush 17. The lower end of the insulating bushing 1 is connected from the inner circumference to the outer circumference of the insertion holes 18 and 19.
The lower end of the outer periphery of 7 has a tapered surface 24 that expands downward, and an engaging stepped portion 2 is provided at the middle of the outer periphery.
5, and the cover 27 has a projecting edge 29 on its inner peripheral surface that engages the engagement step 25 of the insulating bushing 17 inserted into the cover 27 from below. Cover surface 26 2
This insulating bushing 1
7 is tightened in the fitting hole 28 of the cover 27, the contact 11 engaged in the engagement groove 21 of this insulating bushing 17 is tightened, and this cover 27 is fitted into the mounting hole 35 of the base 34. The insulating bushing 17 and the cover 27 inserted by combining the irregularly shaped engaging surface 30 and the irregularly shaped engaging part 39 of 27 can be prevented from rotating, and can be easily assembled with one insulating bushing, reducing the number of parts. less,
It is easy to assemble, has good quality, and can be obtained at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a coaxial cable connector showing an embodiment of the present invention, Fig. 2 is a top and bottom view of the same, Fig. 3 is a partially cutaway front view of the same cover, and Fig. 4 Figure 5 is a partially cutaway bottom view of the above cover, Figure 5 is a partially cutaway front view of the same insulating bushing, Figure 6 is a partially cutaway side view of the same insulating bushing, and Figure 7 is the same as the above insulator. A bottom view of the bushing, FIG. 8 is a front view of the above contact, FIG. 9 is a plan view of the above ground contact, FIG. 10 is a rear view of the above ground contact, and FIG. 11 is an exploded perspective view of a conventional coaxial cable connector. It is. 11... Contact, 12... Plug contact piece part, 15... Connection piece part, 17... Insulating bushing,
18, 19...insertion hole, 21...engaging groove, 25...
...Engaging step portion, 24... Tapered surface, 26... Irregularly shaped surface, 27... Cover, 29... Projection, 30... Irregularly shaped engaging surface, 39... Irregularly shaped engaging portion.

Claims (1)

[Claims for Utility Model Registration] Consisting of a contact 11, an insulating bush 17, a cylindrical cover 27, and a base 34, the contact 11 has a plug contact piece 12 formed at one end and a connecting piece at the other end. the insulating bushing 17 is formed in a substantially cylindrical shape;
The lower end of the outer periphery is made into a tapered surface 24 that expands downward, and an engagement step 25 is formed at the middle part of the outer periphery, and insertion holes 18 and 19 are formed which penetrate in the axial direction. A diametrical engagement groove 21 is formed in which the contact 11 is inserted and held from the lower end to the middle part with the contact 19 in between, and the lower end of the engagement groove 21 is communicated from the inner circumference to the outer circumference of the insertion holes 18 and 19. , this engagement groove 2 is provided at the lower end of the outer periphery.
The cylindrical cover 27 is electrically conductive and has a fitting hole 28 for inserting and holding the insulating bushing 17 extending therethrough in the axial direction. An irregularly shaped engagement surface 30 that matches the irregularly shaped surface 26 of the insulating bushing 17 is formed at the lower part of the inner and outer surfaces, and a protrusion 29 that engages the engaging step part 25 of the insulating bushing 17 inserted from below is formed on the inner periphery. The base plate 34 has a mounting hole 35 formed through the upper and lower surfaces thereof to which the cover 27 is attached.
5 forms an irregularly shaped engagement surface 39 that matches the outer peripheral irregularly shaped engagement surface 30 of the cover 27, and inserts the contact 11 into the engagement groove 21 of the insulating bushing 17 from below from the plug contact piece 12 side; This insulating bushing 17 is fitted into the fitting hole 2 by aligning the irregularly shaped surface 26 with the irregularly shaped engaging surface 30 of the cover 27.
8, the engaging stepped portion 25 of this insulating bushing 17 is engaged with the protrusion 29 of the cover 27, and the tapered surface 24 of this insulating bushing 17 is tightened with the fitting hole 28 of the cover 27, and this cover is 27 is inserted into the mounting hole 35 of the base plate 34 with the irregularly shaped engaging surface 30 and irregularly shaped engaging portion 39 of the cover 27 aligned.