KR102406553B1 - Coaxial Connector - Google Patents

Abstract

In order to provide a coaxial connector capable of improving matching of characteristic impedance, the receptacle 20 as a coaxial connector of the present invention can be connected with a plug 10 configured at the terminal of the coaxial cable Cb. The receptacle 20 has a metal shell 2 , a second dielectric cylinder 4 , and a second center contact 6 . The metal shell 2 has a cylindrical portion 2c connectable to the shell 1 of the plug connected to the external conductor Wb. The second dielectric cylinder 4 is supported inside the metal shell 2 . One end side of the second center contact 6 has a male terminal 6t connectable to a female terminal 5t. The other end side of the second center contact 6 is supported inside the second dielectric cylinder. The second center contact has, at the proximal end of the male terminal 6t, a shoulder portion 6s that is wider than the outer diameter of the male terminal 6t. In the state where the male terminal 6t is connected to the female terminal 5t of the plug, the shoulder portion 6s enters the inside of the support hole 3h of the first dielectric cylinder 3 of the plug.

Description

Coaxial Connector

The present invention relates to a coaxial connector. In particular, it relates to a structure of a coaxial connector having a center contact having a male terminal detachably connected with a female terminal of a mating coaxial connector as a coaxial connector configured at a terminal of a coaxial cable.

For example, with respect to a multicore coaxial connector (receptacle connector) that can be mounted on a printed circuit board, a coaxial connector assembly in which a multicore coaxial connector (plug connector) configured in terminals of a plurality of coaxial cables is detachable is disclosed. (For example, refer patent document 1).

It is described that the coaxial connector assembly according to Patent Document 1 can perform a releasable full lock while maintaining the characteristic impedance.

Patent Document 1: Japanese Patent Application Laid-Open No. 2019-3856

In the coaxial connector assembly according to Patent Document 1, a center contact portion 54 having a thick tip as a male terminal in a receptacle connector is inserted into a center terminal 21 as a female terminal surrounded by an outer terminal 22 of a plug connector. As a result, the female terminal and the male terminal are electrically connected. Since the outer diameter of the male terminal is small compared to the outer diameter of the female terminal, and the outer diameter of the base end of the male terminal is reduced compared to the front end, there is a situation that it is not easy to improve the signal transmission characteristics.

The present invention has been made in view of the above circumstances, and it is possible to further improve the matching of characteristic impedance, and to provide a coaxial connector having a center contact in which a male terminal for connection with a female terminal of a center contact on the opposite side is provided at the tip end. aim to

The present inventors paid attention to devising a structure of a male terminal to be connected with the female terminal of the mating center contact. The inventors of the present invention think that matching of characteristic impedance can be improved by forming a shoulder portion wider than the outer diameter of the male terminal, and configuring the tip side of the shoulder portion to enter the inside of the dielectric surrounding the female terminal. Based on this, a new coaxial connector as follows was invented.

(1) A coaxial connector according to the present invention is a coaxial connector configured in a terminal of a coaxial cable having a central conductor, a dielectric surrounding the central conductor, an outer conductor covering the dielectric, and an insulating sheath covering the outer conductor; A coaxial connector detachably connected, wherein the mating coaxial connector includes a cylindrical shell in which the coaxial connector can be introduced into an open one end and the other end is connected to the external conductor, and a central portion from one end to the other. A first dielectric passage having a support hole penetrating toward the end face, a first dielectric passage held inside the shell, supported inside a support hole of the first dielectric tube, has a female terminal on one end side, and the other end side is the center A first central contact having a cylindrical shape having a connection terminal connected to a conductor is provided, wherein the tip end of the female terminal in the first central contact is spaced apart from the first dielectric tube without contacting the first dielectric tube, and the coaxial connector includes: a metal shell provided with a cylindrical part connectable to the shell at an end of A second center contact capable of entering the inside of the , having a male terminal connectable to the female terminal on one end side, and having the other end side supported inside the second dielectric cylinder, wherein the second center contact is , which is inside the second dielectric cylinder at the base end of the male terminal and is wider than the outer diameter of the male terminal and protrudes from the end face of the second dielectric cylinder, the first dielectric cylinder of the mating coaxial connector and a shoulder portion having a width formed to be smaller than the inner diameter, and in a state in which the female terminal and the male terminal are connected, at least a part of the shoulder portion enters the inside of the support hole of the first dielectric cylinder, have.

(2) Preferably, the male terminal consists of a pin contact formed in a cylindrical shape, and the shoulder portion is formed in a rectangular plate shape and is wider than an outer diameter of the pin contact.

(3) The shoulder portion may have a width formed so as to be substantially equal to the outer diameter of the first central contact.

(4) The shoulder portion is larger than an outer diameter of the first center contact, and the female terminal and the male terminal are connected to each other. It is not necessary to abut against the first dielectric cylinder in the support hole.

In the coaxial connector according to the present invention, the second center contact connectable to the first center contact on the other side has a shoulder portion wider than the outer diameter of the male terminal at the base end of the male terminal. When the female terminal and the male terminal are connected, the shoulder portion enters the inside of the support hole of the first dielectric cylinder on the opposite side, so that matching of the characteristic impedance can be improved.

Fig. 1 is a perspective view showing the configuration of a coaxial connector according to an embodiment of the present invention, and Fig. 1 (A) shows a state in which the coaxial connector according to the embodiment is connected to the mating coaxial connector, Fig. 1 (B) ) shows a state before the coaxial connector according to the embodiment is connected to the mating coaxial connector.
Fig. 2 is a perspective view showing the configuration of the coaxial connector according to the embodiment, in which Fig. 2 (A) shows a state in which the coaxial connector according to the embodiment is connected to the counterpart coaxial connector, and Fig. 2 (B) is the implementation A state diagram before the coaxial connector according to the shape is connected to the mating coaxial connector is shown.
Fig. 3 is an exploded perspective view showing the configuration of the coaxial connector according to the embodiment.
Fig. 4 shows the configuration of the mating coaxial connector according to the embodiment, in which Fig. 4(A) is a perspective view, and Fig. 4(B) is an exploded perspective view of assembly.
Fig. 5 shows a state in which the coaxial connector according to the above embodiment is connected to the mating coaxial connector, and Fig. 5 (A) is a view in the coaxial direction from the terminal (cut surface) side of the coaxial cable of the mating coaxial connector, Fig. Fig. 5(B) is a cross-sectional view taken in the direction of the CC arrow of Fig. 5(A), Fig. 5(C) is a cross-sectional view taken in the direction of the DD arrow of Fig. 5(A), and Fig. 5(D) is Fig. 5 It is an enlarged view of the connection part in (B).
Fig. 6 shows the configuration of the coaxial connector according to the embodiment, Fig. 6 (A) is a front view, Fig. 6 (B) is a cross-sectional view taken in the direction of the LL arrow in Fig. 6 (A), Fig. 6 (C) is a cross-sectional view seen in the direction of arrow JJ in Fig. 6 (A), Fig. 6 (D) is a perspective view.
Fig. 7 is a view showing the configuration of the mating coaxial connector according to the embodiment, Fig. 7 (A) is a front view, Fig. 7 (B) is a cross-sectional view taken in the direction of the GG arrow in Fig. 7 (A), Fig. Fig. 7(C) is a cross-sectional view taken in the direction of arrow HH in Fig. 7(A), and Fig. 7(D) is a perspective view.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention with reference to drawings is demonstrated.

(Configuration of the coaxial connector on the opposite side)

Before describing the configuration of the coaxial connector according to the embodiment of the present invention, the configuration of the mating coaxial connector will be described.

(full configuration)

Referring to Fig. 1 (A), Fig. 1 (B) or Fig. 2 (A), Fig. 2 (B) and Fig. 4 (A), Fig. 4 (B), the opposite side coaxial connector (hereinafter , 'plug') (10) is configured at the terminal of the coaxial cable (Cb). The coaxial cable (Cb) has a center conductor (Wc), a dielectric (Di) surrounding the center conductor (Wc), an outer conductor (Wb) covering the dielectric (Di), and an insulating sheath (Wi) covering the outer conductor (Wb) ) has

The plug 10 can be detachably connected to the coaxial connector (hereinafter, referred to as a 'receptacle') 20 according to an embodiment of the present invention. The receptacle 20 may be mounted on a printed circuit board (not shown), for example.

The plug 10 has a cylindrical shell 1 , a first dielectric cylinder 3 , and a first cylindrical contact 5 . The opened end of the shell 1 can be introduced into the receptacle 20 . Further, the other end of the shell 1 is connected to the external conductor Wb through the crimping of the crimping sleeve 7 .

A first dielectric cylinder 3 is held inside the shell 1 . The first dielectric cylinder 3 has a support hole 3h in its central portion. The support hole 3h penetrates from one end face of the first dielectric cylinder 3 toward the other end face. The first dielectric cylinder 3 may be inserted from one end of the shell 1 .

Referring to Fig. 4 (A), Fig. 4 (B) or Fig. 5 (A) to Fig. 5 (D) and Fig. 7 (A) to Fig. 7 (D), the first center contact ( 5) is supported inside the support hole 3h of the first dielectric cylinder 3 . In the first center contact 5, one end side is a female terminal 5t, and the other end side is a connection terminal 5c. The connection terminal 5c is comprised by the crimping|compression-bonding terminal, and is connected to the center conductor Wc. The female terminal 5t of the first center contact 5 can be connected to the male terminal 6t of the receptacle 20 (see Fig. 5C or Fig. 5D).

Referring to FIG. 4B or FIG. 7C , the female terminal 5t of the first center contact 5 has a contact spring Eo divided by a slit 5s. The inner wall of the insertion port of the female terminal 5t is bulged by the contact spring Eo (refer FIG.5(D)). Here, the tip of the divided contact spring Eo is bent inward, and an insertion hole having a bulging inner wall is formed.

Referring to Fig. 3 or Fig. 4 (A), Fig. 4 (B) and Fig. 5 (C), the first center contact 5 is configured to suppress the fluctuation of the outer diameter D in the axial direction. have Even at the time of contact with the male terminal 6t of the receptacle 20, the first center contact 5 is formed to have substantially the same outer diameter D including the female terminal 5t except for the connection terminal 5c. has been Thereby, the 1st center contact 5 suppresses the fluctuation|variation of the outer diameter D of the axial direction.

[Configuration of coaxial connector]

Next, with reference to FIGS. 1 to 3 and 5 (A) to 5 (D) or FIGS. 6 (A) to 6 (D), a coaxial connector according to an embodiment of the present invention The configuration of (hereinafter, referred to as a 'receptacle') 20 will be described. The receptacle 20 has a metal shell 2 , a second dielectric cylinder 4 , and a second center contact 6 .

The metal shell 2 is composed of a rectangular parallelepiped body 2b and a cylindrical portion 2c. A support hole 2h is provided in the central portion of the metal shell 2 and penetrates from the front end surface of the cylindrical portion 2c toward the bottom surface of the main body 2b.

The second dielectric cylinder 4 is supported inside the support hole 2h of the metal shell 2 . A second center contact 6 is held at the center of the second dielectric cylinder 4 . A male terminal 6t is configured on one end side of the second center contact 6 . The other end side of the second center contact 6 is press-fitted into the center of the second dielectric cylinder 4 , for example. The male terminal 6t is disposed so as to protrude from one end face of the second dielectric cylinder 4 .

In the second center contact 6, a shoulder portion 6s is formed at the proximal end of the male terminal 6t. The shoulder portion 6s has an outer shape wider than the outer diameter of the male terminal 6t. The second center contact 6 is fixed to the second dielectric cylinder 4 in a state in which the male terminal 6t and the proximal ends of the shoulder 6s protrude from the end face of the second dielectric cylinder 4 . has been

The second dielectric cylinder 4 to which the second center contact 6 is attached can be inserted from the bottom face side of the main body 2b. And in the state where the 2nd dielectric cylinder 4 is hold|maintained inside the metal shell 2, the male terminal 6t is arrange|positioned in the middle part inside the cylindrical part 2c (FIG. 6(B) ), see Fig. 6 (C)).

Fig. 1 (A), Fig. 1 (B) or Fig. 2 (A), Fig. 2 (B), Fig. 3 or 6 (A) to Fig. 6 (D) and Fig. 5 (A) ) to 5D , when the plug 10 is moved toward the receptacle 20 , the tip side of the plug 10 may be introduced into the cylindrical portion 2c. And, the male terminal 6t can enter the inside of the female terminal 5t with the contact spring Eo interposed therebetween, and can be electrically connected to the female terminal 5t. In addition, when one end of the shell 1 enters the cylindrical portion 2c, the metal shell 2 and the shell 1 may be electrically connected.

Referring to FIG. 5D , in a state in which the female terminal 5t and the male terminal 6t are connected, the shoulder portion 6s is disposed inside the support hole 3h of the first dielectric cylinder 3 . has been entered. Thereby, matching of characteristic impedance can be improved.

1 (A), 1 (B), or 2 (A), 2 (B) and 4 (A), 4 (B), 3 or 6 of FIG. The configuration of the plug 10 will be described with reference to FIGS. 6A to 6D and FIGS. 5A to 5D. The plug 10 further includes a compression sleeve 7 . The other end of the shell 1 is inserted between the dielectric Di and the external conductor Wb. When the compression sleeve 7 is compressed to the terminal of the coaxial cable Cb through the insulating sheath Wi, the other end of the shell 1 may be electrically connected to the external conductor Wb. In addition, the plug 10 is fixed to the terminal of the coaxial cable Cb by the crimping sleeve 7 being crimped to the terminal of the coaxial cable Cb via the insulating sheath Wi.

(Configuration of the first central contact)

Next, with reference to Fig. 4 (A), Fig. 4 (B) or Fig. 5 (A) to Fig. 5 (D) and Fig. 7 (A) to Fig. 7 (D) in the embodiment The configuration of the related first central contact 5 will be described. The first center contact 5 can obtain a cylindrical contact by forming a conductive metal plate.

The contact spring Eo of the insertion port in the female terminal 5t of the first center contact 5 is folded back from the outer periphery to the inner periphery. Thereby, upon contact with the male terminal 6t of the opposite side, the outer diameter D of the female terminal 5t can approximately converge to the outer diameter D of the first center contact 5 . Although the first center contact 5 according to the embodiment discloses a cylindrical contact formed by molding a metal plate into a cylindrical shape, the screw machine contact ( Contacts cut from metal rods) can also be configured.

In addition, although the female terminal 5t according to the embodiment discloses a contact spring Eo divided in half, the contact spring Eo may be divided more than half as long as the outer diameter D is not exceeded. , for example, may be divided into three or a cross-shaped slit, and may be divided into four.

(Configuration of the second central contact)

Next, with reference to Figs. 3 or 5 (A) to 5 (D) and Figs. 6 (A) to 6 (D), the configuration of the second center contact 6 according to the embodiment is described. Explain. The 2nd center contact 6 consists of a metal plate which has electroconductivity, and the plate-shaped 2nd center contact 6 can be obtained by punching the metal plate which has electroconductivity.

In the embodiment, the male terminal 6t is constituted by a pin contact formed in a cylindrical shape. On the other hand, the shoulder portion 6s of the proximal end of the pin contact is formed in a rectangular plate shape and is wider than the outer diameter of the pin contact. The thickness of the rectangular plate of the shoulder portion 6s is equal to the diameter of the pin contact of the male terminal 6t, or is larger than the diameter of the pin contact due to the influence of processing of the pin contact or the like. The other end side of the second center contact 6 including the male terminal 6t and the shoulder portion 6s may be integrally formed. In the embodiment, the male terminal 6t is formed in a columnar shape, but the male terminal 6t may be formed in a square columnar shape.

Further, referring to FIG. 5D , the shoulder portion 6s has a width formed in the same size (approximately the same size) as the outer diameter of the first center contact 5 . Alternatively, the shoulder portion 6s has a width formed in a size larger than the outer diameter of the first center contact 5 and smaller than the inner diameter of the first dielectric cylinder 3 .

[Operation of coaxial connector]

Next, the action and effect of the receptacle 20 according to the embodiment will be described with reference to FIGS. 1A and 1B to 7A to 7D. The receptacle 20 includes a metal shell 2 having a cylindrical portion 2c connectable to the shell 1 on the opposite side, a second dielectric cylinder 4 supported inside the metal shell 2, and the opposite side. A second center contact 6 having a male terminal 6t connectable to a female terminal 5t of the shell 1 on one end side is provided. Further, the second center contact 6 has a shoulder portion 6s that is wider than the outer diameter of the female terminal 5t at the base end of the male terminal 6t. Thereby, in the state in which the female terminal 5t and the male terminal 6t are connected, the shoulder part 6s is in a state in which it entered the inside of the support hole 3h of the 1st dielectric cylinder 3 on the opposite side. Therefore, matching of characteristic impedance can be improved.

Further, in the receptacle 20 according to the embodiment, the second center contact 6 has, at the base end of the male terminal 6t, a shoulder portion 6s wider than the outer diameter of the male terminal 6t, In a state in which the female terminal 5t and the male terminal 6t are connected, the shoulder portion 6s is configured to be able to enter the support hole 3h of the first dielectric cylinder 3 on the opposite side, so that the voltage It is possible to improve the standing wave ratio (VSWR: Voltage　Standing　Waｖe　Ratio).

Although this invention disclosed the coaxial connector for printed circuit boards detachable to the coaxial connector for single-wire coaxial cables (opposite side coaxial connector), this invention is also applicable to a multicore coaxial connector.

1: shell 2: metal shell
2c: cylindrical part 2h: support hole
3: first dielectric cylinder 3h: support hole
4 : 2nd dielectric cylinder 5 : 1st center contact
5c: connection terminal 5t: female terminal
6: second center contact 6t: male terminal
6s: Shoulder part 10: Plug (coaxial connector on the opposite side)
20: receptacle (coaxial connector) Cb: coaxial cable
D : outer diameter Di : dielectric
Wb : outer conductor Wc : center conductor
Wi: Insulation sheath

Claims (4)

A coaxial connector removably connected to a mating coaxial connector configured at a terminal of a coaxial cable having a central conductor, a dielectric surrounding the central conductor, an outer conductor covering the dielectric, and an insulating sheath covering the outer conductor, the coaxial connector comprising:
The coaxial connector on the opposite side,
A cylindrical shell capable of introducing the coaxial connector to one end of the open end and connected to the outer conductor at the other end;
A first dielectric passing through which has a support hole penetrating from one end to the other end in the central portion, and held inside the shell;
and a first cylindrical center contact supported inside the support hole of the first dielectric cylinder, having a female terminal on one end side and a connection terminal connecting the other end side to the central conductor,
The distal end of the female terminal in the first center contact is spaced apart from the first dielectric tube,
The coaxial connector is
A metal shell provided with a cylindrical portion connectable to the shell at one end thereof;
a second dielectric passage supported inside the metal shell, and one end surface of which is disposed adjacent to one end surface of the first dielectric tube;
a second center contact capable of entering the inside of the female terminal, having a male terminal connectable to the female terminal on one end side, and having the other end side supported inside the second dielectric cylinder;
The second center contact is inside the second dielectric cylinder at the base end of the male terminal and is wider than the outer diameter of the male terminal and protrudes from the end face of the second dielectric cylinder, and the mating coaxial connector Including a shoulder portion having a width formed in a size smaller than the inner diameter of the first dielectric cylinder,
In a state in which the female terminal and the male terminal are connected, at least a part of the shoulder portion enters the support hole of the first dielectric cylinder. The method according to claim 1,
The male terminal consists of a pin contact formed in a cylindrical shape,
The shoulder portion is formed in a rectangular plate shape and is wider than an outer diameter of the pin contact coaxial connector. The method according to claim 1 or 2,
The shoulder portion is a coaxial connector having a width formed to be the same as an outer diameter of the first central contact. The method according to claim 1 or 2,
The shoulder portion is larger than the outer diameter of the first center contact, and in a state in which the female terminal and the male terminal are connected, the coaxial connector does not abut against the first dielectric cylinder in the support hole.

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