JPH0684569A - Coaxial connector - Google Patents

Abstract

PURPOSE:To set the number of parts smaller than in conventional devices, achieve a simple structure and favorable assembling property, and achieve compactness. CONSTITUTION:A common terminal plate 34 and a normally closed terminal plate 35 are formed having a common contact part and a normally closed contact part which are normally in contact with each other by resiliency to get freely closer to/apart from each other. A plug 40 is provided with a center conductor 21 and a holding member 24. This holding member 24 is held at a position where the normally closed contact part is apart from the center conductor 21 when a receptacle is connected to the plug 40. The center conductor 21 is thus electrically connected to the common terminal plate 34 only.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable having a function of disconnecting an internal antenna when the external antenna is connected, when the portable radio having the internal antenna is connected to the external antenna. It is about connectors.

[0002]

2. Description of the Related Art Conventionally, as this type of coaxial connector, as shown in FIG. 7, a plug 20 in which a center conductor 21 and an outer conductor 22 are coaxially arranged, and a plug 20 are detachably coupled. And a receptacle 10 are provided. Center conductor 21 and outer conductor 2 of plug 20
A supporting member 2 made of an insulating material such as synthetic resin is provided between the supporting member 2 and
9 is installed.

The receptacle 10 is shown in FIGS. 8 (a) -8 (c).
As shown in FIG. 2, a contact 12 having a receiving portion 12b, which is movable in the inserting direction of the plug 20 and into which the center conductor 21 of the plug 20 is inserted, is provided in a housing 11 made of synthetic resin. Return spring 1 for urging to 20 side
Equipped with 3. The contactor 12 includes contact pieces 14a and 14b, and the contact pieces 14a and 14b are in sliding contact with the common terminal plate 15 and the normally closed terminal plate 16 fixed to the housing 11. When the plug 20 is connected to the receptacle 10, the contact 12
The pressing body 18 made of an insulating material fixed to the plug is attached to the plug 20.
The return spring 13 is pushed by the center conductor 21 and moves so as to compress the return spring 13. When the plug 20 is not connected,
The contact piece 14a contacts the common terminal board 15, and the contact piece 14b
By contacting the normally closed terminal plate 16, the common terminal plate 15 and the normally closed terminal plate 16 are connected via the contactor 12. On the other hand, when the plug 20 is connected, both contact pieces 14a and 14b contact the common terminal board 15. Therefore, if an antenna circuit such as a transmitter is connected to the common terminal board 15, an internal antenna is connected to the normally closed terminal board 16, and an external antenna is connected to the plug 20, the external antenna is not connected. In this state, the antenna circuit is connected to the internal antenna, and when the external antenna is connected via the coaxial connector, the internal antenna is disconnected and the external antenna is connected to the antenna circuit. Here, the outer conductor 22 of the plug 20 contacts the shield conductor 17 disposed on the outer peripheral surface of the housing 11.

[0004]

In order to perform the above operation, when the plug 20 is coupled to the receptacle 10, the force from the central conductor 21 of the plug 20 can be transmitted to the contact 12 and the return spring 13. The pressing member 18 made of synthetic resin is provided because it is necessary. However, since the contactor 12 and the pressing member 18, which are separate members, need to be coupled, the number of parts increases and the structure becomes complicated. There is a problem that the assemblability is poor, and since the pressing body 18 has a size that can be coupled to the contactor 12, it is a factor that hinders miniaturization.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a coaxial connector which has a smaller number of parts than the conventional one, has a simple structure, is excellent in assemblability, and can be miniaturized. It is a thing.

[0006]

The invention of claim 1 is a coaxial connector comprising a plug in which a central conductor and an outer conductor are coaxially arranged, and a receptacle to which the plug is detachably coupled. The receptacle includes a case provided with a shield conductor connected to the outer conductor, and a common terminal plate housed inside the case, at least a part of which is disposed so as to face each other and is elastically contacted at all times. And a normally-closed terminal plate, and holding the normally-closed terminal plate at a position separated from the central conductor in a state where the common terminal plate and the central conductor are electrically connected to either one of the receptacle and the plug. Means are provided.

According to a second aspect of the present invention, the holding means comprises a holding piece projecting from a supporting member supporting the central conductor of the plug toward the receptacle side, and the holding piece comprises a common terminal plate and a central conductor. The normally-closed terminal plate is held at a position separated from the central conductor in a state where and are electrically connected. According to a third aspect of the present invention, the holding means comprises a fixing piece provided inside the case of the receptacle for fixing the normally closed terminal plate at a position separated from the entry path of the central conductor, and the common terminal plate is the receptacle and the plug. In the coupled state, the central conductor is moved away from the normally closed terminal plate.

[0008]

According to the structure of the first aspect, the receptacle has a common terminal plate and a normally-closed terminal plate, which are at least partially opposed to each other and are in elastic contact with each other, and which are normally closeable. Since the holding means for holding the normally closed terminal plate at a position separated from the central conductor in a state where the common terminal plate and the central conductor are electrically connected is provided on either one, The common terminal board can be easily and reliably switched to either the normally closed terminal board or the central conductor. As a result, the two terminal plates, the return spring, and the pressing body other than the contacts, which are conventionally required, are no longer required, the number of parts can be significantly reduced, and the structure of the coaxial connector can be simplified.

According to the second aspect of the invention, the common terminal plate and the central conductor are electrically connected by the holding piece protruding from the supporting member supporting the central conductor of the plug toward the receptacle. Since the normally-closed terminal plate can be held at a position away from the center conductor, the gap between the normally-closed terminal plate and the center conductor should be large even when the coaxial connector is downsized. You can

According to the third aspect of the present invention, a fixing piece for fixing the normally closed terminal plate to a position separated from the entrance path of the central conductor is provided inside the case of the receptacle, and the common terminal plate is composed of the receptacle and the plug. Since it is configured to separate from the normally closed terminal plate when the central conductor enters in the coupled state, displacement of the normally closed terminal plate toward the central conductor side can be prevented, and the gap between the normally closed terminal plate and the central conductor can be prevented. Can be larger.

[0011]

【Example】

(Embodiment 1) The receptacle 30 of this embodiment is shown in FIG.
It has a structure of (d). The housing 31 is formed of a cylindrical case 32 and a support member 33 that closes an opening on the back side of the case 32. A shield conductor 17 is provided on the outer peripheral surface of the housing 31 so as to cover substantially the entire surface.

A common terminal plate 34 and a normally closed terminal plate 35 made of an elastic material are housed inside the case 32.
The common terminal plate 34 includes the spring piece 3 supported by the support member 33.
4a, a common contact portion 34c formed at the tip of this spring piece 34a, and a receiving portion 34b extending obliquely downward from the tip side of each common contact portion 34c. The spring piece 34a
Is bent obliquely upward from the mounting position of the support member 33 toward the approach path S, and the common contact portions 34c are arranged on both sides of the approach path S of the central conductor 21. The normally-closed terminal plate 35 includes a substantially L-shaped spring piece 35a supported by the support member 33, a normally-closed contact portion 35c formed at the tip of the spring piece 35a, and tip ends of the respective contact portions 35c. And a receiving portion 35b that extends obliquely upward from. The spring piece 35a is bent upward from the mounting position of the support member 33 and further bent obliquely downward.
5c is in elastic contact with the common contact portion 34c. The space between the normally closed contact portion 35b and the common contact portion 34b is the center conductor 21.
Is the approach route S of. Further, the receiving portion 35b of the normally closed terminal plate 35 is longer than the receiving portion 34b of the common terminal plate 34, and can come into contact with a holding piece 24 of a plug 40 described later. The common terminal plate 34, the normally closed terminal plate 35, and the shield conductor 17 have terminal pieces 34d, 35d, 17 protruding from the rear surface of the housing 31, respectively.
a is provided.

On the other hand, the plug 40 shown in FIG. 1 has a cylindrical outer conductor 22, a central conductor 21 extending along the central axis of the outer conductor 22, a support member 29 for holding the central conductor 21, and a supporting member 29 for holding the central conductor 21. A cylindrical holding piece 24 protruding in the axial direction is formed integrally with the inner end portion of the support member 29. When the plug 40 is connected to the receptacle 30, the holding piece 24 has a function of pressing the receiving portion 35b of the normally closed terminal plate 35 upward to separate the normally closed terminal plate 35 from the common terminal plate 34. Have.

Here, the receptacle 30 and the plug 4
In the uncoupled state with 0, as shown in FIG. 2B, the contact portions 34c, 35c of the common terminal plate 34 and the normally closed terminal plate 35, respectively.
Are elastically point-contacted with each other, and the common terminal plate 34 and the normally closed terminal plate 35 are held in an electrically connected state. Further, in the coupled state of the receptacle 30 and the plug 40,
As shown in FIG. 1, the center conductor 21 is inserted between the receiving portions 34b, 35b of the common terminal plate 34 and the normally closed terminal plate 35, and the outer conductor 22 contacts the outer peripheral surface of the shield conductor 17. At this time, the holding piece 24 of the plug 40 pushes up the receiving portion 35b of the normally closed terminal plate 35, and the normally closed contact portion 3
5c is forcibly separated from the common contact portion 34b, and at the same time, the central surface 34e (see FIG. 3) of the common contact portion 34b elastically comes into surface contact with the central conductor 21. As a result, the common terminal plate 34 and the normally closed terminal plate 35 are electrically cut off and the common terminal plate 34 and the central conductor 21 are electrically connected. Further, when the plug 40 is removed from the receptacle 30, the normally closed terminal plate 35 is restored by its spring force and is electrically connected to the common terminal plate 34.

As described above, when the plug 40 is inserted and removed, the common terminal plate 34 becomes the normally closed terminal plate 35 or the center conductor 2.
Since it is possible to selectively switch to either one of the above, the two terminal plates other than the contactors, the return spring, and the pressing body, which have been conventionally required, are no longer required, and the number of parts can be greatly reduced. Therefore, the assembling of the coaxial connector can be facilitated, the structure can be simplified, and the miniaturization thereof can be achieved.

Further, in this embodiment, when the plug 40 is fitted, both the common terminal plate 34 and the normally closed terminal plate 35 are elastically deformed, so that the normally closed terminal plate 35 and the common terminal plate 35 are elastically deformed. A large contact gap with 34 can be taken and an excellent switching function can be obtained. Moreover, FIG.
The central portion 34e of the common contact portion 34b shown in FIG.
Since the contact with is surface contact, it has excellent high frequency characteristics. Further, each receiving portion 3 of both the terminal plates 34, 35
Since 4b and 35b are respectively expanded in the vertical direction, there is an advantage that the center conductor 21 can be smoothly inserted and the plug 40 can be easily inserted.

(Second Embodiment) A receptacle 30 of the present embodiment.
4A to 4D, as shown in FIGS.
The arrangement state of the normally closed terminal plate 35 is set to be opposite to that of the first embodiment, and the tip end portion 35b 'of the normally closed terminal plate 35 is located at the center conductor 21.
It is fixed at a position away from the approach path S of. That is, the tip portion 35 is formed in the groove 50 between the fixed piece 51 and the case 32 formed at the same height as the opening 32a of the case 32.
b'is fitted. The common contact portion 34c of the common terminal plate 34 is elastically contacted with the normally closed contact portion 35c,
In the coupled state of the plug 40 and the receptacle 30 shown in FIG. 5, the spring piece 34a of the common terminal plate 34 is pushed up by the intrusion of the central conductor 21, and as shown in FIG. The center conductor 21 elastically makes surface contact. As described above, the tip portion 35 of the normally closed terminal plate 35 is
By fixing b ′ to the case 32 side, there is no fear that the normally closed terminal plate 35 will bend toward the center conductor 21 side. Therefore, it is easy to make a large gap between the normally closed terminal plate 35 and the center conductor 21. In addition to the reduction of, it is possible to secure a better switching function.

[0018]

According to the first aspect of the present invention, the receptacle has a common terminal plate and a normally-closed terminal plate which are at least partially opposed to each other and which are normally elastically contacted with each other. Since either one is provided with a holding means for holding the normally closed terminal plate at a position separated from the central conductor in a state where the common terminal plate and the central conductor are electrically connected to each other, the number of components is smaller than that of the conventional one. However, the common terminal board can be easily and surely switched to either the normally closed terminal board or the central conductor. As a result, the structure of the coaxial connector is simplified, the assemblability is improved, and the size can be reduced.

According to the second aspect of the invention, the common terminal plate and the center conductor are always electrically connected by the holding piece protruding from the supporting member supporting the center conductor of the plug toward the receptacle. Since the closed terminal plate is held at a position separated from the center conductor, even if the coaxial connector is downsized, it is possible to make a large gap between the normally closed terminal plate and the center conductor in the coupled state of the plug and the receptacle. The effect is that you can do it.

According to the third aspect of the present invention, a fixing piece for fixing the normally closed terminal plate at a position separated from the entrance path of the central conductor is provided inside the case of the receptacle, and the common terminal plate is
Since it is configured to be separated from the normally closed terminal plate by the entrance of the center conductor in the state where the receptacle and the plug are coupled,
There is an effect that the gap between the normally closed terminal plate fixed inside the case and the center conductor can be made larger, and further miniaturization can be realized.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a combined state of a receptacle and a plug according to a first embodiment.

2A and 2B show a receptacle of Example 1, where FIG. 2A is a plan sectional view, FIG. 2B is a side sectional view, FIG. 2C is a rear view, and FIG.
Is a front view.

FIG. 3 is a front cross-sectional view showing a connection state between the common terminal plate and the center conductor of the first embodiment.

4A and 4B show a receptacle of Example 2, where FIG. 4A is a plan sectional view, FIG. 4B is a side sectional view, FIG. 4C is a rear view, and FIG.
Is a front view.

FIG. 5 is a cross-sectional view showing a coupled state of the receptacle and the plug of the second embodiment.

FIG. 6 is a front cross-sectional view showing a connection state between a common terminal plate and a central conductor of Example 2.

FIG. 7 is a cross-sectional view showing a coupled state of a receptacle and a plug of a conventional example.

FIG. 8 shows a receptacle of a conventional example, (a) is a side sectional view, (b) is a rear view, and (c) is a front view.

[Explanation of symbols]

 17 shield conductor 21 center conductor 22 outer conductor 24 holding piece 29 support member 30 receptacle 32 case 34 common terminal plate 34b common contact portion 35 normally closed terminal plate 35b normally closed contact portion 40 plug 51 fixed piece S entry path

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[Procedure amendment]

[Submission date] September 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

Figure 4 shows a receptacle of Example 2, (a) is a plan sectional view, (b) is a side sectional view, (c) is a rear view, (d)
Is a front view.

Claims (3)

[Claims] 1. A coaxial connector comprising a plug in which a center conductor and an outer conductor are coaxially arranged, and a receptacle to which the plug is detachably coupled, wherein the receptacle is connected to the outer conductor. A receptacle provided with a shield conductor, a common terminal plate and a normally-closed terminal plate that are housed inside the case, at least a part of which are arranged so as to face each other and are normally elastically contacted, and a normally closed terminal plate. A coaxial connector, wherein a holding means for holding the normally closed terminal plate at a position separated from the central conductor in a state where the common terminal plate and the central conductor are electrically connected is provided on either one of the plug and the plug. . 2. The holding means is provided so as to project toward a receptacle from a supporting member that supports the center conductor of the plug, and the normally-closed terminal plate is provided in a state where the common terminal plate and the center conductor are electrically connected. The coaxial connector according to claim 1, comprising a holding piece which is held at a position apart from the central conductor. 3. The holding means is provided inside the case of the receptacle, and comprises a fixing piece for fixing the normally closed terminal plate at a position separated from the entry path of the center conductor, and the common terminal plate is a combination of the receptacle and the plug. The coaxial connector according to claim 1, wherein the coaxial connector is configured to be separated from the normally closed terminal plate when the central conductor enters in the state.