JP3132123B2 - Coaxial connector mating structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting structure for a coaxial connector comprising a coaxial plug and a coaxial receptacle.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are cross-sectional views showing a conventional coaxial connector fitting structure. FIG. 4 is a diagram illustrating a state in which the L-shaped coaxial plug is being fitted to the coaxial receptacle, and FIG. 5 is a diagram illustrating a state in which the L-shaped coaxial plug is fitted to the coaxial receptacle.

[0003] The housing 30 of the L-shaped coaxial plug has a fitting portion 31 for fitting into the coaxial receptacle, and the inner conductor 51 of the coaxial cable 5 is placed on the center axis of the fitting portion 31 via a bushing 32. Is connected to the center socket 33
Has been fixed.

The fitting portion 31 has a hollow cylindrical shape, and has a projection 34 protruding outward on a peripheral surface of a tip portion thereof, and has, for example, three slits 35 formed at regular intervals on a side surface. Have been.

On the other hand, the coaxial receptacle is connected to the fitting portion 3.
1 having a fitted portion 36 having an inner diameter substantially the same as the outer diameter of
At the center of the bottom surface of the fitted portion 36, an internal terminal 37 fitted to the center socket 33 is fixed so as to protrude upward. An external terminal 38 is provided on a part of the inner peripheral surface of the fitted portion 36, and a concave portion 39 with which the convex portion 34 of the fitting portion 31 engages is formed near the bottom surface of the external terminal 38. ing.

The fitting between the L-shaped coaxial plug and the coaxial receptacle is performed as follows. The fitting part 31 of the L-shaped coaxial plug is replaced with the fitting part 3 of the coaxial receptacle.
6, the fitting portion 31 is deformed inward by receiving a force from the fitted portion 36 due to a dimensional difference between its outer diameter and the inner diameter of the fitted portion 36, and The convex portion 34 of the fitting portion 31 is pressed against the inner wall of the fitted portion 36 by the elastic force in the direction (see FIG. 4).

Then, when the fitting portion 31 is inserted against the frictional force generated between the convex portion 34 and the inner wall of the fitted portion 36 and the tip reaches the bottom surface of the fitted portion 36, The convex portion 34 of the fitting portion 31 is engaged with the concave portion 39 of the fitted portion 36 by the elastic force, and the L-shaped coaxial plug and the coaxial receptacle are connected so as not to be easily separated (see FIG. 5).

[0008]

The conventional coaxial connector fitting structure utilizes the outward restoring force P generated in the fitting portion 31 by the elastic force of the material of the housing 30. The restoring force P is represented by the number h of the slits 35, the Young's modulus of the material E, the second moment of area Iz,
The displacement amount y, and the length of the slit 35 is L, generally represented by P = (3h · E · Iz · y) / L 3.

As can be seen from the above equation, the restoring force P is inversely proportional to the cube of the slit length L, and has a property of being very large when the slit length L is slightly reduced. Therefore, in the conventional coaxial connector fitting structure, it is necessary to provide a slit 35 having a predetermined length in the fitting portion 31 of the L-type coaxial plug in consideration of the workability of the fitting of the coaxial connector. It is difficult to reduce the height.

The present invention has been made in view of the above problems, and has as its object to provide a fitting structure for a coaxial connector in which the length of the fitting portion of the coaxial plug can be reduced and the height can be reduced. Things.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for fitting a coaxial connector comprising a coaxial plug having a thin cylindrical fitting portion and a coaxial receptacle to which the coaxial plug is connected. Wherein the two fitting portions have a cross section formed by forming a thin metal plate into a hollow cylindrical shape.
It is made of a cylindrical body that can be deformed in a circular shape. At least one convex portion is formed on one cylindrical side surface, and a concave portion with which the convex portion can be engaged is formed on the other cylindrical side surface. is there.

[0012]

According to the present invention, the fitting portion of the coaxial plug is inserted into the fitting portion of the coaxial receptacle, and the protrusion formed on the cylindrical side surface of one fitting portion is formed on the cylindrical side surface of the other fitting portion. Upon contact, one fitting portion receives a force from the other fitting portion, and its cross-sectional shape is deformed into an elliptical shape. As a result, the area of the contact portion between the two fitting portions increases, and an appropriate resistance force at the time of fitting occurs. Then, when the fitting portion of the coaxial plug is inserted against this resistance, the convex portion engages with the concave portion, and the coaxial plug is connected to the coaxial receptacle so as not to be easily detached.

As described above, the resistance at the time of fitting is generated by deforming the cross-sectional shape of the fitting portion of the coaxial plug or the coaxial receptacle into an elliptical shape and increasing the contact area between the fitting portions. The size is less affected by the height of the fitting portion. Therefore, the height of the fitting portion can be reduced, and the height of the coaxial connector can be reduced.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A fitting structure of a coaxial connector according to the present invention will be described with reference to FIGS. FIG. 2 is a sectional view showing a structure of an L-shaped coaxial plug to which a coaxial cable is connected, and FIG. 3 is a sectional view showing a structure of a coaxial receptacle to which the L-shaped coaxial plug is coupled. FIG. 1 is a sectional view showing a state where the L-shaped coaxial plug is connected to a coaxial receptacle.

In FIG. 2, an L-shaped coaxial plug 1 includes a housing 2 as an outer conductor, a center socket 4 as a center conductor, and the center socket 4 connected to the housing 2.
And a bushing (insulator) 3 which is supported in an insulated state on a central axis in the fitting portion 21. A coaxial cable 5 having a diameter of, for example, 2 mm is attached.

The housing 2 is provided with the coaxial cable 5
And a fitting part 21 for fitting and connecting to a fitting part of a coaxial receptacle described later. The fitting portion 21 is formed in a hollow cylindrical shape by, for example, drawing a thin metal plate having elasticity, and has a concave portion 212 to be engaged in a circumferential direction at a tip portion thereof. .

In this embodiment, the concave portion 212 is formed on the entire periphery of the fitting portion 21, but may be formed on a part of the circumferential direction.

The mounting portion 22 is formed by, for example, a caulking member provided at a base end of the fitting portion 21 in a direction perpendicular to the fitting portion 21. The electrical connection and the fixing of the coaxial cable 5 are performed by clamping and crimping the portions.

A center socket 4 is fixed at a predetermined position on the central axis in the fitting portion 21 via a bushing 3, and the coaxial cable 5 is inserted into a slit 41 formed at a base end of the center socket. Of inner conductors 51 are mated and connected. The center socket 4 is made of a thin metal plate on a cylinder having an elastic force, and its front end has several slits 42.
And is divided into a plurality of contact pieces 43 so that a center pin 9 of a coaxial receptacle 6 described later fits therein.

The coaxial receptacle 6 shown in FIG. 3 is of a surface mounting type which can be mounted on a substrate. For example, a fitting portion of the L-type coaxial plug 1 is provided at the center of the surface of a rectangular disk-shaped insulator 7 made of resin or the like. A fitting portion 71 having an inner diameter substantially the same as or slightly larger than 21 is bored, and an outer conductor 8 and a center pin (center conductor) 9 are provided at predetermined positions of the insulator 7.

The outer conductor 8 is disposed on the inner peripheral surface 711 of the fitted portion 71 with a small gap so that the cross-sectional shape can be deformed into an elliptical shape. Is
A convex section 81 having a circular cross section, for example, which engages with the concave section 212 of the fitting section 21 is provided so as to protrude inward. The outer conductor 8 is also formed into a hollow cylindrical shape by, for example, drawing a thin metal plate having elasticity, like the fitting portion 21.

Incidentally, the convex portion 81 can be provided at an arbitrary position of the external conductor 8 so as to be able to engage with the concave portion 212 of the fitting portion 21. Further, two or more protrusions 81 may be provided, and the shape is not limited to a circle.

External terminals 10 and 10 'are provided at appropriate positions on the upper end of the external conductor 8 and opposite to each other. These external terminals 10 and 10 ′ are attached along the surface and the side surface of the insulator 7, respectively, and the leading ends 10 a and 10 a ′ are wrapped around the bottom surface 72.

The center pin 9 is connected to the fitted portion 71
The bottom plate 72 of the insulator 7 is provided at the center position of the bottom surface 72. The base 91 of the center pin 9 is connected to a circuit on the board side on which the center pin 9 is mounted.
2 are formed in the same plane, and the upper end of the center pin 9 is
The fitting portion 71 protrudes upward from the bottom surface 72 by a predetermined length.

The fitting of the L-shaped coaxial plug 1 and the coaxial receptacle 6 having the above structure is performed in the following process. L
When the fitting portion 21 of the mold coaxial plug 1 is inserted into the fitted portion 71 of the coaxial receptacle 6, and the outer peripheral surface 211 a of the distal end thereof comes into contact with the convex portion 81 of the external conductor 8 of the fitted portion 71, The convex portion 81 receives an external force by the outer peripheral surface 211 a of the fitting portion 21, and a side surface of the external conductor 8 near the convex portion 81 is deformed outward, while a side surface in a direction perpendicular to the convex portion 81. Deforms inward.

That is, the outer conductor 8 is deformed into an elliptical shape as a whole, and the side surface near the short axis direction is the side surface 2 of the fitting portion 21.
11, the contact area between the fitting portion 21 and the external conductor 8 is increased, and an appropriate resistance force at the time of fitting due to friction is generated.

Then, the L-shaped coaxial plug 1 is inserted into the fitted portion 71 of the coaxial receptacle 6 against the resistance,
When the convex portion 81 of the external conductor 8 reaches the concave portion 212 of the fitting portion 21, the elliptically deformed external conductor 8 returns to the original circular shape by its elastic force, and the convex portion 81 of the external conductor 8 is fitted. The fitting operation is completed by engaging with the concave portion 212 of the joint portion 21.

As described above, the fitting portion 21 of the L-shaped coaxial plug 1 has a cylindrical shape having a concave portion 212 to be engaged at the tip, while the external conductor 8 of the coaxial receptacle 6 is formed.
Is a structure in which an inner peripheral surface is formed into an elliptically deformable cylindrical shape having a convex portion 81 engaged with the concave portion 212, and the outer conductor 8 is deformed to generate an appropriate resistance force at the time of fitting. Therefore, the height dimension of the fitting portion 21 has little effect on the magnitude of the resistance force, and the height of the fitting portion 21 can be shortened to reduce the height of the coaxial connector. it can.

Incidentally, the fitting structure may be reverse to that of the above embodiment. That is, the fitting portion 21 of the L-shaped coaxial plug 1 is formed into a cylindrical body having a convex portion for engagement formed on a side surface and a cross-sectional shape that can be deformed into an elliptical shape. A cylindrical body having a circumferential concave portion formed on the peripheral surface may be used.

In this configuration, when the fitting portion 21 of the L-shaped coaxial plug 1 is inserted into the fitted portion 71 of the coaxial receptacle 6, the projection of the fitting portion 21 becomes the outer conductor 8 of the coaxial receptacle 6. The fitting portion 21 is in contact with the inner peripheral surface and the outer conductor 8
The cross-sectional shape is deformed into an elliptical shape by receiving a force inward from the substrate.

As a result, the contact area between the fitting portion 21 and the external conductor 8 is increased, and an appropriate resistance force at the time of fitting due to friction is generated. When the fitting portion 21 is inserted against this frictional force, the convex portion of the fitting portion 21 engages with the concave portion of the outer conductor 8, and the L-shaped coaxial plug is easily inserted into the coaxial receptacle 6. Combined so as not to leave.

In the above embodiment, an L-shaped coaxial plug has been described. However, the present invention can be applied to a straight type or another type of coaxial plug.

Also, various shapes of the housing and the insulator can be adopted without departing from the spirit of the present invention.

[0034]

As described above, according to the present invention,
Both consists of a coaxial receptacle coaxial plug and the coaxial plug having a mating portion of the thin cylinder is connected, both the fitting portion
Is an elliptical cross section formed by forming a thin metal plate into a hollow cylindrical shape.
It is made of a cylindrical body that can be deformed in a circular shape, and at least one convex portion is formed on the cylindrical side surface of one fitting portion, while the convex portion can be engaged with the cylindrical side surface of the other fitting portion. When the fitting part of the coaxial plug is inserted into the fitting part of the coaxial receptacle, the cross-sectional shape of the fitting part with the convex part is changed to an elliptical shape, and the contact between the two fitting parts is formed. Since the area is increased so that an appropriate resistance force at the time of fitting is generated, the magnitude of this resistance is hardly changed by the height dimension of the fitting part, and the height dimension of the fitting part is small. , The height of the coaxial connector can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which an L-shaped coaxial plug is connected to a coaxial receptacle.

FIG. 2 is a sectional view showing a structure of an L-shaped coaxial plug to which a coaxial cable is connected.

FIG. 3 is a sectional view showing a structure of a coaxial receptacle to which an L-shaped coaxial plug is coupled.

FIG. 4 is a cross-sectional view showing a state where a conventional coaxial plug is being fitted into a coaxial receptacle.

FIG. 5 is a cross-sectional view showing a state where a conventional coaxial plug is fitted into a coaxial receptacle.

[Description of Signs] 1 L-type coaxial plug 2 housing 3 bushing 4 center socket 5 coaxial cable 6 coaxial receptacle 7 insulator 8 external conductor 9 center pin 10, 10 'external terminal 21 fitting part 22 mounting part 41, 42 slit 43 Contact piece 71 Fitted portion 72 Bottom surface 81 Convex portion 91 Base portion

Continuation of the front page (56) References Japanese Utility Model 58-120579 (JP, U) Japanese Utility Model 61-109082 (JP, U) Japanese Utility Model 3-3-67878 (JP, U) Japanese Utility Model 3-50807 (JP, U) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 24/02

Claims (1)

(57) [Claims] 1. A fitting structure for a coaxial connector comprising a coaxial plug having a thin cylindrical fitting portion and a coaxial receptacle to which the coaxial plug is connected, wherein the two fitting portions are formed by hollow metal thin plates. The cross-sectional shape formed in a cylindrical shape is elliptical
It is made of a cylindrical body that can be deformed in a circular shape, and at least one convex portion is formed on one cylindrical side surface, and a concave portion with which the convex portion can be engaged is formed on the other cylindrical side surface. Characteristic coaxial connector fitting structure.