JPH0113344Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a coaxial cable connector.
The present invention relates to a structure in which a cover, in which contacts are fitted via an insulating bushing, is attached to a base.

[Conventional technology]

Conventional coaxial cable connectors of this type
As shown in the figure, 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 made of metal. The insulating bushing 5 inserted into the cover 4 is held by caulking the cover 4, the cover 4 is inserted into the mounting hole of the board, and the mounting collar 4a of the cover 4 and the threaded part 4b of the cover 4 are connected. A structure was adopted in which the cover 4 was attached to the base by sandwiching the upper and lower peripheries of the mounting hole of the base with screwed nuts 6. And the ground contact 7 is a cover 4 inserted into the base.
The nut 6 is used to hold the nut 6 in place.

[Problem that the invention attempts to solve]

In the conventional coaxial cable connector described above, the conductive cover 4 holding the contacts 1 via the insulating bushes 2 and 5 is fitted into the mounting hole of the board, the ground contact 7 is fitted into the cover 4, and then the cover 4 is fitted into the mounting hole of the board. Since the nut 6 is screwed into the threaded portion 4b of the screw, the number of parts is large, the number of assembly steps is large, the productivity is poor, and the cost is high.

The present invention was developed in view of the above-mentioned drawbacks, and the cover can be attached by fitting the cover with the contacts fitted through the insulating bushings onto the base, and engaging the ground contact with the cover, thereby reducing the number of parts. The present invention provides a coaxial cable connector with improved assembly and productivity.

[Means for solving problems]

The coaxial cable connector of the present invention includes a contact having a plug contact piece on one end and a connecting piece on the other end, an insulating bushing into which the contact is inserted and held, and a conductive bushing into which the insulating bushing is inserted and held. It consists of a cylindrical cover, an earth contact attached to this cover, and a base in which a mounting hole is formed to attach the cover, and a mounting flange is provided protruding from the middle part of the outer periphery of the cover, and is spaced apart from the mounting flange. A locking groove is formed below the mounting collar, a forked engagement piece portion is formed in the ground contact to be locked in the locking groove of the cover, and the cover is fitted into the mounting hole of the base. Attach the mounting flange to the top surface of the periphery of the mounting hole, engage the engagement piece of the ground contact with the locking groove of the cover that is inserted into the mounting hole of the base on the bottom side of the base, and then connect the mounting flange with the The feature is that the cover is attached to the base by sandwiching the base with the ground contact.

[Effect]

In the coaxial cable connector of the present invention, the contact is inserted into the engagement groove of the insulating bushing, the insulating bushing is fitted into the conductive cover, the cover is fitted into the mounting hole of the board, and the connector is mounted on the top surface of the periphery of the mounting collar. Engage the flange, and engage the engagement piece of the ground contact with the locking groove of the cover that is inserted into the mounting hole of the base on the lower side of the base, and sandwich the base between the mounting flange and the earth contact. The cover is attached to the base.

〔Example〕

The configuration of the 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 includes a plug contact piece 12 on one end side.
A plug pin engaging groove 13 which is open at the tip thereof is formed, 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 this 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 penetrates 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, which communicate with each other via a reduced diameter step part 20. Further, an engagement groove 21 is formed diametrically across the insertion holes 18 and 19, and the lower end of the engagement groove 21 is open to communicate from the inner circumference to the outer circumference to form a divided cylinder 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. At the middle part of the outer periphery, there is an engagement step 2 located toward the top.
5 is formed.

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 surfaces 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 earth contact locking grooves 32 are formed on both sides of the guide protrusion 31.
An annular mounting flange 33 is formed above the flange.

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. Furthermore, the mounting hole 35 of the base 34 is formed with a modified engagement portion 39 that matches the modified outer peripheral 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, the insulating bush 17 into which the contact 11 has been inserted is inserted 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 1
The tapered surface 24 of 7 is crimped into the fitting hole 28 of the cover 27, and the divided cylinder portions 22, 2 of the insulating bushing 17
2 are tightened together, and the contact 11 held in the engagement groove 23 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.
The cover 27 is prevented from rotating by the means for preventing rotation of the cover 27 by the engagement with the irregularly shaped engaging portion 39. Further, the rotation preventing means for the cover 27 is not limited to this structure.

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, an insulating bushing for inserting and holding the contact, and a conductive cylindrical cover for inserting and holding the insulating bushing. A locking groove is formed below the mounting flange apart from the flange, and a forked engagement piece portion that is latched to the locking groove of the cover is formed on the ground contact. Insert the earth contact into the mounting hole of the board, engage the mounting collar on the upper surface of the periphery of the mounting hole, and engage the engagement piece of the ground contact in the locking groove of the cover that is inserted into the mounting hole of the board on the bottom side of the board. It can be easily assembled by attaching the cover to the base by sandwiching the base between the mounting flange and the earth contact, the number of parts is small, ease of assembly is improved, quality is good, and it can be obtained at low cost. It is something.

[Brief explanation of drawings]

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,
27... Cover, 33... Mounting collar, 32... Locking groove, 34... Base, 35... Mounting hole, 40...
...Earth contact, 41...Engagement piece part.

Claims (1)

[Scope of utility model registration request] a contact having a plug contact piece on one end and a connecting piece on the other end; an insulating bush into which the contact is inserted and held; a conductive cylindrical cover into which the insulating bush is inserted and held; It consists of an attached ground contact and a base in which a mounting hole is formed to attach the cover, and a mounting collar is provided protruding from the middle part of the outer periphery of the cover, and is fixed below the mounting collar at a distance from the mounting collar. a groove is formed in the earth contact, a fork-shaped engagement piece portion is formed in the ground contact to be engaged with the engagement groove of the cover, and the cover is inserted into the mounting hole of the base plate and the upper surface of the periphery of the mounting hole is formed. Engage the mounting flange, and engage the engagement piece of the ground contact with the locking groove of the cover that is inserted into the mounting hole of the base on the bottom side of the base, and sandwich the base between the mounting flange and the earth contact. A coaxial cable connector characterized by a cover attached to the base.