JPH0334867Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a coaxial connector that electrically connects cable core wires of general electronic equipment, test equipment, etc. The present invention relates to a coaxial connector that is suitable as a connector for various sensors that require the following.

[Conventional technology]

The 25th conventional coaxial connector for sensors.
The one shown in the figure is generally known.

That is, this conventional connector includes a tightening nut 1, an insulator 2, a center contact 3, an insulator 4, a shell 5, a connecting ring 6, and a gasket 7, and the connection of the cable 8 to the nut is made by cutting out a circle in the cable sheath 8a. After pulling out the shield wire 8b,
Insert the cable 8 through the tightening nut 1, fold the edge of the shielded wire 8b back into the tightening nut 1, cut the insulator 8c to expose the center conductor 9, insert the insulator 2, After inserting the center contact 3 and fixing it by soldering (in the case shown) or crimping, insert the insulator 4 therein, then fix the shell 5 and the connecting ring 6 with an assembly tool, and insert the shell 5. The tightening nut 1 was fully screwed in to connect the wires, and the gasket 7 of the connecting ring 6 was inserted into the center contact 3 from the opening side.

Although not particularly shown, the center conductor is held by sandwiching the dielectric material between its conical flange and disc-shaped flange in a sandwich shape, and the crimped crimped part on the outer periphery of the main connector is crimped and crimped into a square shape. There is a known technology for mechanically connecting and electrically connecting cable shield wires and cord tubes that are electrically connected to the main body of the connecting device and the center conductor.
(See Publication No. 41007).

[Problem that the invention attempts to solve]

By the way, in the coaxial connector shown in FIG. 25 among those described in the prior art, the cable center conductor 9 is electrically connected to the center contact 3.
is simply inserted into the insulators 2, 4, and the insulators 2, 4
is simply inserted into the shell 5, and the cable is connected by screwing in the tightening nut 1, and no fixing means are provided for the center contact 3, so that the center contact 3 is not attached to the insulators 2 and 4. If the cable rotates in a direction perpendicular to the relative axial direction, or rotates relative to the shell 5, the cable, especially the center conductor 9, is likely to break, resulting in poor reliability, and the tightening nut 1 Because of the screw-in structure, small connectors for sensors have poor workability when connecting cables, and if the screw is not screwed in properly, the center contact 3 may move in the axial direction, causing wire breakage and sheath displacement. had.

Furthermore, not only are there a large number of insulators 2 and 4 and other component parts, but there is also the problem that cost reductions cannot necessarily be achieved sufficiently due to the machining of the tightening nut 1, the machining of screws in the shell 5, etc.

In addition, in the case described in Japanese Utility Model Publication No. 50-41007, the part that is crimped into a square shape is the part between the cable insulator and the cable center conductor, and the part where the cable center conductor is connected is the part where the cable center conductor is connected. The conductor portion is not crimped and swaged into a square shape, and the center conductor is simply held in place by sandwiching the dielectric material between its conical and disk-shaped flange.

Therefore, although movement of the center conductor in the axial direction is prevented, and rotation in a direction perpendicular to the axial direction is also prevented to some extent by the contact resistance between the two ribs and the dielectric material, crimping of the square shape Since the pressing force due to caulking does not reach the dielectric material, the bond between the dielectric material and the center conductor is weak, and the center conductor is not completely fixed to the dielectric material. This had problems such as rotation of the center conductor in a direction perpendicular to the axial direction, causing problems such as disconnection of the center conductor, resulting in poor reliability.

In addition, since the center conductor has a dielectric material sandwiched between a conical brim and a disc-shaped brim in a sandwich-like shape, rotation of the center conductor is prevented by the contact resistance between the center conductor brim and the dielectric material. Both members are required to be machined with high precision in order to maximize the contact resistance between the collar and the dielectric, which poses the problem of not being easy to manufacture or assembling.

The present invention was developed in view of these conventional problems, and its purpose is to prevent the center contact from moving in the axial direction and at the same time reliably preventing rotation in the direction perpendicular to the axial direction. In addition, relative movement of the shell and insulator in the axial direction is prevented, and at the same time, rotation in the direction perpendicular to the axial direction is reliably prevented, eliminating cable breakage and sheath displacement.
It is an object of the present invention to provide a small coaxial connector that can always provide good electrical connection, has excellent reliability, and is suitable mainly for use in various sensors.

[Means for solving problems]

For this purpose, the present invention provides a cylindrical shell which is crimped almost entirely to have a square cross-section, and a part of the shell which is crimped integrally with the shell to have a square cross-section. fixed,
In addition, in the central axis direction, an insulator having a through hole for inserting a center contact consisting of a concentric slightly larger diameter part and a smaller diameter part, and at least one square collar part or at least one collar having a knurled part in the outer circumferential direction. and in the through hole of the insulator,
a center contact that is inserted with its flange positioned at a slightly larger diameter portion, and whose flange bites into the insulator and is fixed to the insulator by crimping and caulking an insulator integral with the shell; A configuration in which the center conductor of the cable is electrically connected to the center contact, and the connecting portion of the coaxial cable in the shell is fixed via a clamp and by crimp caulking having a rectangular cross section of the shell. It is characterized by:

〔Example〕

Hereinafter, embodiments will be described along with their functions based on the drawings.

FIG. 1 is a half-sectional view of an example of a coaxial connector according to the present invention, in which reference numeral 10 indicates a cylindrical shell, which has a locking step 11 on its front inner periphery;
0 is connected to a connecting ring 12. Reference numeral 13 designates a cylindrical clamp that includes a portion 14 having an outer diameter that substantially matches the inner diameter of the shell 10, a portion 16 having an outer diameter slightly smaller than the inner diameter of the shell, and an inner circumferential step 17 via an outer circumferential step 15. It integrally has a portion 18 which has the same outer diameter as the outer diameter of the portion 16 and whose inner diameter is slightly smaller than the inner diameter of the portion 16, and whose total length in the axial direction is shorter than half the length of the shell 10. .

Reference numeral 19 denotes a cylindrical insulator, which has a locking step 20 on the outer periphery of its front end that engages with the locking step 11 of the shell 10, and a concentric slightly larger diameter portion 23 and a smaller diameter portion in the central axis direction. It has a center contact insertion through hole 22 consisting of a portion 24, and a center contact positioning step portion 21 formed of a slightly larger diameter portion 23 and a smaller diameter portion 24 slightly rearward of the locking step portion 20. The total length of the center contact insertion through hole 22 is longer than half the length of the shell 10, and the insulator 1
The total length of the clamp 9 and the clamp 13 is made to match the total length of the shell 10.

Reference numeral 25 denotes a center contact that is inserted into the center contact insertion through hole 22 of the insulator 19, and the center contact 25 has at least one rectangular flange portion or an outer periphery in the axial direction, as shown in FIGS. 2 to 13. It has at least one collar having a knurl.

In FIGS. 2 and 3, the center contact 25 has the inner diameter and outer diameter of the small diameter portion 24 in the center contact insertion through hole 22 of the insulator 19 substantially matching, and its length in the axial direction extends from the stepped portion 21. A contact portion 26 having a circular cross section extending over the opening edge of the connecting ring 12, and a rectangular block-shaped collar whose height almost matches the inner diameter of the slightly larger diameter portion 23 are integrally connected to the rear end of the contact portion 26. part 27 and the collar part 2
7 and a flange portion 29 equivalent to the flange portion 27 integrally connected to the rear end via a base portion 28 having a circular cross section and coaxially connected to the contact portion 26; A blind hole 30 extending from the base 28 to the base 28 and drilled in the direction of its center axis into which the center conductor of the connected coaxial cable is inserted, and a soldering hole 30 for the center conductor drilled in the base 28 in communication with the hole 30. Hole 3
1.

The center contact 25 shown in FIGS. 4 and 5 (the same reference numerals as in FIGS. 2 and 3 indicate the same parts; the same applies hereinafter) has one square block-shaped flange, and the contact portion A front base 32 having the same diameter as the base 28 integrally connected to the rear end of 26
A flange portion 34 having the same shape as the flange portions 27 and 29 is provided between this and a coaxial rear base portion 32.

Note that the brim portion is not limited to a rectangular shape, and may have any number of corners, such as a hexagonal shape, as long as it is a rectangular shape.

Center contact 25 shown in FIGS. 6 and 7
The two collar portions 27 and 29 of the center contact shown in FIG. 2 and FIG. It is modified into two circular collar parts 35 and 37 having knurled parts 36 and 38 in the direction of the outer circumferential axis.

Center contact 25 shown in FIGS. 8 and 9
is for one circular brim with knurled part,
The rectangular block-shaped flange portion 34 of the center contact shown in FIGS. 4 and 5 has an outer diameter that almost matches the inner diameter of the slightly larger diameter portion 23 of the center contact insertion through hole 22, and is knurled in the outer circumferential axial direction. It is modified into a circular collar part 39 having a section 40.

The center contact 25 shown in FIGS. 10 and 11 has two flange portions 27 and 29 in the center contact shown in FIGS. 2 and 3 whose outer diameters are slightly larger than the center contact insertion through hole 22. It is transformed into two approximately elliptical brim portions 41 and 43 that approximately match the inner diameter of the diameter portion 23 and have flat chamfers 42 and 44 on both axial side surfaces,
In addition, when the center contact 25 shown in FIGS. 12 and 13 has one flange portion with chamfered sides, the flange portion 34 in the center contact shown in FIGS. The inner diameter of the slightly larger diameter portion 23 of the insertion through hole 22 is approximately equal to the inner diameter, and both sides in the axial direction are chamfered 46 to be flat.
It is modified into a roughly oval shaped collar part 45,
Both are modified versions of the square brim.

Note that the illustrated center contacts 25 are all of the soldering type in which the center conductor of the coaxial cable is connected by soldering. It is possible to form a rectangular flange portion or the like on the center contact at the same time as crimping the center conductor and the contact using a crimping tool.

In FIG. 1, 47 indicates a gasket.

In order to connect the coaxial cable 100 in the above configuration, first the jacket 100 of the coaxial cable 100 is
Cut out the shielded wire 102, insert the coaxial cable 100 through the clamp 13, and connect the shielded wire 102 so that the clamp 13 does not move in the axial direction.
Fold back all the way up to the stepped portion 15, then cut out the insulator 103 to expose the center conductor 104,
After the center conductor 104 is inserted into the hole 30 and electrically connected to the center contact 25 by soldering, the center conductor 104 is inserted into the center contact insertion through hole 22, and the stepped portion 2 is inserted into the center contact insertion through hole 22.
1 to position and hold the center contact 25 in the insulator 19. Then, the insulator 19 holding the center contact 25 is inserted and held together with the clamp 13 into the shell 10 to which the connection ring 12 is connected. Together with the whole, the insulator 19 is crimped and caulked into a square cross section using a die (not shown).
The insulator 19 is bitten into the flange of the center contact 25 and crimped, and the shell 10 and the insulator 1 are
9. Coaxial cable 100 and center contact 2
5 are fixed together, and the gasket 47 is inserted into the contact portion 26 of the center contact 25 to complete the connection of the coaxial cable.

Although both the shell 10 and the insulator 19 are crimped into a hexagonal shape, the shape is not limited to this, and the number of corners can be arbitrary as long as the shell 10 and the insulator 19 are rectangular.

When the shell 10 is crimped and caulked into a rectangular cross-section in this way, the insulator 19 is crimped and caulked integrally with the shell 10 and plastically deformed into a rectangular cross-section, so that the shell 1
0 and at the same time center contact 2.
The rectangular block-shaped collars 27 and 29 of No. 5 bite into the insulator 19, and the center contact 25 is integrally fixed to the insulator 19. Furthermore, since the insulator 19 and the shell 10 are crimped and fixed in an integral square shape, the relative movement of the insulator 19 and the shell 10 in the axial direction is prevented at the same time. Rotation in the axial and perpendicular directions is prevented.

In addition, by crimping shell 10 into a square shape, shell 1
0, the insulator 19 and the center contact 25 are integrally crimped, and as shown in FIGS. 1 and 15, the shield wire 1 of the coaxial cable 100 is
The folded portion of 02 is clamped integrally with the shell 10 in a square shape between the clamp 13 and the shield wire 102, the insulator 103 and the center conductor 1.
04 is attached to the shell 1 by the part 18 of the clamp 13.
1 and 16, the connection base of the coaxial cable 100 including the jacket 101 is integrally crimped with the shell 10, and the connection base of the coaxial cable 100 is integrally crimped with the shell 10 in a rectangular shape. Since the shell 10 is integrally crimped and fixed with the
Insulator 19, center contact 25, and coaxial cable 100 are simultaneously crimped and fixed.

In the above explanation of cable connection, the center contact 25 has two rectangular block-shaped ribs as shown in FIGS. 2 and 3. The same applies to the case where there is only one block-shaped flange, as shown in FIGS. 17 to 20, and the explanation thereof will be omitted.

Further, the same applies to other modifications of the illustrated center contact, and the cable connection and explanation thereof will be omitted.

The coaxial connector described in detail above uses a plug as an example, but the present invention includes a receptacle in addition to the plug, which is shown in FIGS. 21 to 24.

In the figure, 50 is a shell provided with circumferential grooves 51 at two locations on the outer periphery for crimping and caulking using dies;
52 is an insulator, 53 is a center contact, and the center contact 53 has at least one rectangular flange or at least one flange having a knurled portion in the direction of the outer circumferential axis, similar to the center contact 25 in the plug. There is.

The receptacle shown in FIG. 21 includes a center contact 53 having two substantially elliptical collars 54 with chamfered sides 55, 57 similar to the two substantially elliptical collars 42, 44 in the center contact 25;
56 is provided in one piece, and its assembly involves inserting the center contact 53 into the center contact insertion through hole and holding the center contact 53 within the insulator 52, and then removing the insulator 52 holding the center contact 53. After being inserted and held in the shell 50, the grooves 51 and 5 in the shell 50 are cut using a die (not shown).
The center contact 53, the insulator 52, and the shell 50 are integrally fixed by crimping and caulking the portion between the center contact 53 and the insulator 52 into a rectangular (hexagonal) cross section.

In this way, the insulator bites into and presses against the center contact including the flange, preventing the center contact from moving in the axial direction and at the same time preventing rotation in the direction perpendicular to the axial direction. As shown in FIG. 22, the insulator 52 and the shell 50 are crimped and fixed into an integral rectangular shape. rotation is prevented, and movement and rotation of the center contact 53 is reliably prevented.

The receptacles shown in Figures 23 and 24 are
This is a case where the center contact 53 is integrally provided with one approximately oval collar portion 58 with chamfered sides 59 on both sides as shown in FIG. This is the same as the case shown in the figure, and its explanation will be omitted.

[Effect of idea]

According to the present invention, when almost the entire shell is crimped and caulked into a square cross-section, the insulator is crimp-crimped integrally with the shell, plastically deformed into a square cross-section, and integrally fixed to the shell. At the same time,
The rectangular flange of the center contact that electrically connects the center conductor of the coaxial cable bites into the insulator, and the center contact is integrally fixed to the insulator, preventing the center contact from moving in the axial direction and at the same time preventing the center contact from moving in the axial direction. Rotation in the direction perpendicular to the direction is reliably prevented,
Furthermore, relative movement and rotation in the axial direction between the insulator and the shell is reliably prevented because the insulator and the shell are strongly crimped and caulked into an integral square shape.

In addition, since the coaxial cable connection part is fixed via the clamp and by the square-shaped crimp crimping, there is no cable breakage or sheath displacement, and a good electrical connection is always obtained, ensuring reliability. It can significantly increase the

Furthermore, according to the present invention, only one insulator is required;
In addition, the shell, insulator, and center contact that connects the coaxial cable are fixed integrally using a crimp method, which reduces the number of parts and facilitates manufacturing and assembly compared to conventional products. This makes it possible to reduce costs and is highly economical.

In summary, the present invention solves all the problems of the conventional connectors, is optimal as a coaxial connector for various sensors for which ultra-miniaturization is strongly desired, and has great industrial effects.

[Brief explanation of the drawing]

Fig. 1 is a half-sectional view of an example of the coaxial connector according to the present invention, Figs. 2 to 13 show the center contact, and Fig. 2 is a perspective view of the coaxial connector with two rectangular block-shaped ribs. Figure 3 is a plan view of the same as above;
Fig. 4 is a perspective view when one rectangular block-shaped brim is provided, Fig. 5 is a plan view of the same as above, Fig. 6 is a perspective view when two circular brim parts with knurled parts are provided, and Fig. 7 The figure is a plan view of the same as above, FIG. 8 is a perspective view of the case where one circular collar with knurled portion is provided, FIG. 9 is a plan view of the same as above, and FIG. 11 is a plan view of the same as above, FIG. 12 is a perspective view of the case where one approximately oval collar portion is provided, FIG. 13 is a plan view of same as above, and FIG. 15 is a sectional view taken along line B-B' in FIG. 1, FIG. 16 is a sectional view taken along line C-C' in FIG. A half-sectional view showing another example of the device, FIG. 18 is a sectional view taken along the line D-D' of the same as above, FIG. 19 is a sectional view taken along the line E-E' of FIG. 17, and FIG. 17 is a sectional view taken along line F-F', FIG. 21 is a half-sectional view showing another example of the present invention, FIG. 22 is a sectional view taken along line G-G' of the same as above, and FIG. 23 is another example. A partially omitted half-sectional view showing an example,
Figure 24 is a cross-sectional view along line H-H' of the same as above;
FIG. 5 is a half sectional view showing a conventional example. 10,50...Ciel, 13...Clamp, 1
9,52...Insulator, 22...Through hole for center contact insertion, 25,53...Center contact, 2
7, 29, 34... Square block-shaped brim, 3
5, 37, 39...Brim part with knurled part, 4
1, 43, 45, 56, 58...approximately oval brim portion, 100...coaxial cable.

Claims (1)

[Claims for Utility Model Registration] A cylindrical shell that is crimped almost entirely into a square cross-section, and a part of the shell that is integrally crimped with a square cross-section and fixed to the shell. and an insulator having a through hole for inserting a center contact consisting of a concentric slightly larger diameter part and a smaller diameter part in the direction of the central axis, and at least one square flange part or at least one knurled part in the outer circumferential direction. The collar is inserted into the through hole of the insulator with the collar positioned at a slightly larger diameter part, and the collar is inserted into the insulator by crimping and caulking the insulator integral with the shell. a center contact that bites into an object and is fixed to an insulating material, the center conductor of the coaxial cable is electrically connected to the center contact, and the connecting portion of the coaxial cable in the shell is connected via a clamp, and A coaxial connector fixed by crimp caulking with a rectangular cross section.