JP6992978B2 - Coaxial connector - Google Patents

Description

The present invention relates to a coaxial connector. In particular, a terminal assembly such as a cylindrical jack connected to a coaxial cable terminal, an external housing into which the terminal assembly can be introduced, and a coaxial cable terminal having the terminal assembly with the insulating sheath peeled off. It relates to the structure of a coaxial connector with a metal sleeve introduced inside and crimped with an outer conductor.

By connecting one terminal assembly (for example, a jack) fixed to the terminal of one coaxial cable and the other terminal assembly (for example, a plug) fixed to the terminal of the other coaxial cable, a high frequency signal can be transmitted to one side. It can be transmitted from one coaxial cable to the other coaxial cable. Alternatively, a high frequency signal can be transmitted from the other coaxial cable to one coaxial cable.

Generally, a coaxial cable is composed of a circular center conductor, a dielectric such as a fluororesin that surrounds the center conductor, an outer conductor such as a braided wire that surrounds the dielectric, and an insulating sheath that covers and protects the outer conductor. is doing.

For example, terminal assemblies such as conventional plugs have a cylindrical external contact and a central contact. An insulator is interposed between the external contact and the central contact. The external contact has a crimping portion on one end side thereof. Further, as for the external contact, the central contact is coaxially arranged on the other end side via the insulator.

With the outer conductor such as the braided wire surrounding the dielectric wrapped around the insulating sheath, that is, with the coaxial cable terminally processed, the outer conductor is crimped from the outside of the insulating sheath to the crimping part of the external contact. As a result, the external contact and the external conductor can be electrically connected, and the terminal assembly can be fixed to the terminal of the coaxial cable.

The above-mentioned coaxial cable terminal processing consists of an "insulation sheath peeling step" that peels the insulating sheath from the end face of the coaxial cable to a predetermined length, and a "metal sleeve crimping" that crimps a metal sleeve opened in a U shape to an outer conductor. "Process" and.

Furthermore, the terminal processing of the coaxial cable includes a "braided folding step" in which the outer conductor is folded back into a metal sleeve, and a "dielectric peeling step" in which the dielectric is peeled off from the end face of the folded outer conductor to a predetermined length. It includes a "center conductor peeling step" of peeling the center conductor from the end face of the above to a predetermined length.

A terminal assembly such as a plug is fixed to the end of the coaxial cable by connecting the center contact to the center conductor of the coaxial cable treated in this way and crimping the base end of the external contact to the metal sleeve. You can connect with.

However, if there is a variation (deviation) in the length of the dielectric in the "dielectric peeling step", the variation (deviation) occurs in the air layer between the end face of the folded outer conductor and the facing wall of the external contact, and the stability is stable. There was a problem that it became difficult to obtain high frequency characteristics (VSWR).

Since the terminal assembly such as a conventional plug has such a defect, a coaxial connector capable of exhibiting stable high frequency characteristics (VSWR) even when there is a deviation in the peeling length of the dielectric is disclosed. (See, for example, Patent Document 1).

Further, a coaxial connector capable of improving the tensile strength of the coaxial cable and suppressing a decrease in the impedance of the coaxial cable is disclosed (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2018-6253 Japanese Unexamined Patent Publication No. 2017-9802

FIG. 7 is a perspective view showing the configuration of the coaxial connector according to the first conventional technique, and is shown as a vertical cross-sectional view passing through the center of the coaxial connector. Note that FIG. 7 of the present application corresponds to FIG. 1 of Patent Document 1.

Referring to FIG. 7, the first prior art coaxial connector (hereinafter referred to as a plug) 8 includes a conductive tubular outer contact 81 and a central contact 82. Further, the plug 8 includes a cylindrical insulator (insulator) 83 and a conductive tubular inner sleeve 84.

Referring to FIG. 7, the coaxial cable Cb includes a circular center conductor Wc made of a single wire or a stranded wire, a dielectric Di such as a fluororesin surrounding the center conductor Wc, a braided wire surrounding the dielectric Di, and the like. It is composed of an outer conductor Wb and an insulating sheath Wi that covers and protects the outer conductor Wb. With reference to FIG. 7, in the coaxial cable Cb, each component is pre-peeled from their terminals with a predetermined peeling length. That is, the coaxial cable Cb is terminally processed.

Referring to FIG. 7, the external contact 81 has a main body portion 81b and a crimping portion 81c. The crimping portion 81c is continuously formed at the base end portion of the main body portion 81b. Further, the crimping portion 81c continuously forms a conductor barrel 811 opened in a U shape before crimping and an insulation barrel 812 opened in a U shape before crimping.

Referring to FIG. 7, the coaxial cable Cb has a metal sleeve Sv crimped to an outer conductor Wb surrounding the dielectric Di. Further, the metal sleeve Sv is covered with the folded outer conductor Wb. The conductor barrel 811 crimps the metal sleeve Sv and the outer conductor Wb via the dielectric Di. The insulation barrel 812 is crimped with an insulating sheath Wi. As a result, the external contact 81 can be electrically connected to the external conductor Wb, and the coaxial cable Cb can fix the plug 8 to the terminal thereof.

Referring to FIG. 7, the central contact 82 has a crimping portion 821 at the proximal end. By crimping the crimping portion 821 to the center conductor Wc, the base end portion of the center contact 82 can be fixed to the center conductor Wc. The central contact 82 can be fitted inside the insulator 83. Further, the center contact 82 has a pin contact 822 at the tip thereof that can be fitted to the mating center contact (not shown).

Referring to FIG. 7, the insulator 83 is fitted inside the main body portion 81b of the external contact 81. The insulator 83 electrically insulates the external contact 81 and the central contact 82.

Referring to FIG. 7, the inner sleeve 84 has its main body exteriorized by the insulator 83 and is arranged so as to be conductive with the external contact 81. Further, the inner sleeve 84 is formed with a plurality of stretchable contact pieces 84b in contact with the end surface of the folded outer conductor Wb at the base end portion.

Referring to FIG. 7, the dielectric Di is inserted into a stepped hole opened at the base end of the insulator 83. In the "dielectric peeling step", if there is a deviation in the length of the dielectric Di, a deviation occurs in the air layer between the end face of the folded outer conductor Wb and the facing wall of the outer contact 81, but the contact piece 84b is folded back. Since it is in contact with the end face of the outer conductor Wb, the plug 8 according to the first conventional technique is said to be able to exhibit stable high frequency characteristics (VSWR).

Referring to FIG. 7, the external contact 81 projects substantially rectangular first wheel band B1, second wheel band B2, and third wheel band B3 in the outer peripheral direction. According to the description of Patent Document 1, the first wheel band B1 is for preventing the plug 8 from being displaced with respect to the outer housing when the plug 8 is inserted into an outer housing (not shown). The functions of the second wheel band B2 and the third wheel band B3 are not disclosed in Patent Document 1, but it is presumed to reinforce the rigidity of the external contact 81.

However, referring to FIG. 7, since the inside of the first wheel band B1, the second wheel band B2, and the third wheel band B3 has a cavity, the transmission from the outer conductor Wb to the inner sleeve 84 is performed. Since the air layer having a small relative permittivity is intermittently arranged on the path, there is a concern that the transmission characteristics may be adversely affected. Further, by forming a large number of ring bands on the external contact 81, it is not easy to form the external contact 81, which is a factor that raises the manufacturing cost of the external contact 81.

There is a demand for a coaxial connector that does not affect the transmission characteristics by reducing the number of annular bands protruding from the outer periphery of the external contact 81.

Further, referring to FIG. 7, the plug 8 according to the first conventional technique can be detachably connected to a mating connector (for example, a jack) (not shown), but it is difficult to maintain the connected state with the mating connector. There is a problem. There is a demand for a coaxial connector having an external housing with a locking mechanism that holds a terminal assembly such as a plug and maintains a connection state with the connector on the other side.

FIG. 8 is a perspective view showing the configuration of the coaxial connector according to the second conventional technique. FIG. 9 is a cross-sectional view taken along the line AA of FIG. 8 and 9 of the present application correspond to FIGS. 1A and 1B of Patent Document 2. Further, since the components having the same reference numerals as those given in the first prior art technique have the same action, the description thereof may be omitted.

Referring to FIGS. 8 and 9, the second conventional coaxial connector (hereinafter referred to as a plug) 9 includes a conductive tubular outer contact 91 and a tubular center contact 92. Further, the plug 9 includes a cylindrical insulator (insulator) 93 and a conductive tubular metal sleeve 94.

Referring to FIG. 9, the central contact 92 has a tail portion 92t on the proximal end side. Further, the central contact 92 has an open entry type connecting portion 92s on the tip end side. The tail portion 92t is electrically connected to the center conductor Wc of the coaxial cable Cb. The connection portion 92s can be detachably connected to a contact on the other side (not shown).

Referring to FIG. 9, the insulator 93 holds the central contact 92 inside. The insulator 93 holds the intermediate portion of the central contact 92 so as to be able to prevent it from coming off. The insulator 93 forms a cylindrical header 93h on the tip end side. Further, the insulator 93 has a holding 93r holding the tail portion 92t inside on the base end side.

Referring to FIG. 9, the external contact 91 holds the insulator 93 inside. The insulator 93 electrically insulates the external contact 91 and the central contact 92.

Referring to FIGS. 8 and 9, the metal sleeve 94 has a first flange portion 941 formed on the tip end side. An external contact 91 is fitted inside the first flange portion 941. Further, the metal sleeve 94 holds the terminal-processed coaxial cable Cb inside the base end portion side thereof (see FIG. 9).

Referring to FIGS. 8 and 9, the metal sleeve 94 has a second flange portion 942 formed at a base end portion. The metal sleeve 94 has a first crimping portion 94a, a second crimping portion 94b, and a non-crimping portion 94c between the first flange portion 941 and the second flange portion 942.

Referring to FIG. 9, the first crimping portion 94a crimps the periphery of the outer conductor Wb via the dielectric Di. As a result, the outer conductor Wb and the metal sleeve 94 are electrically connected. The second crimping portion 94b crimps the periphery of the insulating sheath Wi. As a result, the plug 9 can be fixed to the terminal of the coaxial cable Cb.

Referring to FIG. 9, the non-crimping portion 94c is formed between the first crimping portion 94a and the second crimping portion 94b. The coaxial cable Cb is inserted through the non-crimping portion 94c, but the coaxial cable Cb is not crimped.

Referring to FIGS. 8 and 9, the second conventional plug 9 crimps the coaxial cable Cb at two locations, the first crimping portion 94a and the second crimping portion 94b, so that the tensile strength of the coaxial cable can be increased. It is said that it can be improved. Further, in the plug 9 according to the second conventional technique, since the non-crimping portion 94c does not crimp the coaxial cable Cb from the outer peripheral direction, it is possible to suppress a decrease in the impedance of the coaxial cable Cb.

However, referring to FIGS. 8 and 9, the plug 9 according to the second conventional technique crimps the coaxial cable Cb at two locations, the first crimping portion 94a and the second crimping portion 94b, so that there are many assembly steps. There is a problem. There is a demand for a coaxial connector with a simple structure that reduces the crimping process.

Further, referring to FIGS. 8 and 9, the plug 9 according to the second conventional technique can be detachably connected to a mating connector (for example, a jack) (not shown), but the connection state with the mating connector is maintained. There is a problem that it is difficult. There is a demand for a coaxial connector having an external housing with a locking mechanism that securely holds a terminal assembly such as a plug and maintains a connection state with the mating connector. The above can be said to be the subject of the present invention.

The present invention has been made in view of such a problem, and is a coaxial connector provided with an external housing having a locking mechanism for holding a terminal assembly and maintaining a connection state with a mating connector. It is an object of the present invention to provide a coaxial connector having a simple configuration.

The present inventors construct a terminal assembly connected to a terminal of a coaxial cable, an external housing with a lock arm having a terminal accommodating chamber inside into which the terminal assembly can be introduced, and the terminal assembly, and peel off the insulating sheath. The end of the coaxial cable is introduced inside, and the coaxial connector is composed of a metal sleeve with the outer conductor crimped. The metal sleeve has a cylindrical shaft with the outer conductor of the coaxial cable crimped and the end of the shaft. It is thought that it is possible to provide a coaxial connector that can suppress the number of parts and suppress the runout of the metal sleeve toward the outer circumference for the outer housing by forming the coaxial connector so that it can be fitted in the terminal accommodation chamber and providing a flange portion. Based on the above, we have invented the following new coaxial connectors.

(1) A central conductor, a dielectric surrounding the central conductor, an outer conductor covering the dielectric, and a cylindrical terminal assembly connected to the end of a coaxial cable having an insulating sheath covering the outer conductor. An external housing having a terminal accommodating chamber into which the terminal assembly can be introduced and having a lock arm that can be locked to a mating external housing is provided, and the terminal assembly is a coaxial cable from which the insulating sheath is peeled off. A metal sleeve with the outer conductor crimped to the inside, a central contact connecting the central conductor to the base end, a cylindrical insulator holding the central contact in the center, and the insulator. It has a cylindrical external contact held inside, the external contact is formed on the proximal end side, has an external conductor connecting portion that is freely connectable to the external conductor, and the metal sleeve is the external. It has a cylindrical shaft portion in which the outer conductor of the coaxial cable is crimped via a conductor connecting portion, and a flange portion formed at the end portion of the shaft portion and can be fitted into the terminal accommodating chamber. , Coaxial connector.

(2) The coaxial connector according to 1), wherein the external contact is a coaxial connector in which the external conductor connecting portion is inserted between the external conductor and the dielectric.

(3) The external contact is formed on the tip end side and has a contact connection portion that can be freely connected to the other side external contact, and the contact connection portion is from an open entry in which one or more notches are cut out on the outer periphery. The coaxial connector according to (1) or (2).

The coaxial connector according to the present invention comprises a terminal assembly connected to the terminal of a coaxial cable, an external housing with a lock arm having a terminal accommodating chamber inside into which the terminal assembly can be introduced, and a terminal assembly, and has an insulating sheath. The end of the detached coaxial cable is introduced inside, and the coaxial connector is composed of a metal sleeve with the outer conductor crimped. The metal sleeve has a cylindrical shaft with the outer conductor of the coaxial cable crimped and the end of the shaft. By forming the portion and providing a flange portion that can be fitted in the terminal accommodating chamber, the number of parts can be suppressed and the deflection of the metal sleeve toward the outer periphery can be suppressed with respect to the outer housing.

1A and 1B are perspective views of the coaxial connector, FIG. 1B is a front view of the coaxial connector, and FIG. 1C is a diagram showing a configuration of a coaxial connector according to an embodiment of the present invention. 1 (B) is a cross-sectional view taken along the line BB, and FIG. 1 (D) is a cross-sectional view taken along the line CC of FIG. 1 (B). It is a perspective exploded assembly drawing which shows the structure of the coaxial connector by the said embodiment. It is a figure which shows the structure of the terminal assembly provided in the coaxial connector by the said embodiment, FIG. 3A is a plan view of the terminal assembly, and FIG. 3B is a left side view of the terminal assembly, FIG. (C) is a cross-sectional view taken along the line AA of FIG. 3 (B), and FIG. 3 (D) is a perspective view of the terminal assembly. 4A and 4B are front views of the external housing, FIG. 4B is a plan view of the external housing, and FIG. 4C is a diagram showing a configuration of an external housing provided in the coaxial connector according to the above embodiment. , Right side view of the outer housing, FIG. 4D is a left side view of the outer housing. It is a perspective view which shows the structure of the terminal assembly provided in the coaxial connector by the said embodiment, FIG. 5A is a state diagram before assembling an insulator to an external contact, and FIG. It is an assembled state diagram. It is a perspective view which shows the assembly process of the terminal assembly provided in the coaxial connector by the said embodiment, FIG. 6A is a state figure which terminal-processed a coaxial cable, and FIG. The inserted state diagram, FIG. 6 (C) is a state diagram in which the center contact is crimped to the center conductor of the coaxial cable, and FIG. 6 (D) is a state diagram in which the center contact is incorporated inside the insulator, FIG. 6 (E). Is a state diagram in which the metal sleeve is moved toward the external contact, and FIG. 6 (F) is a state diagram in which the shaft portion of the metal sleeve is crimped to the outer conductor of the coaxial cable. It is a perspective view which shows the structure of the coaxial connector by 1st prior art, and is shown in the vertical sectional view which passes through the center of a coaxial connector. It is a perspective view which shows the structure of the coaxial connector by the 2nd prior art. FIG. 8 is a cross-sectional view taken along the line AA of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Coaxial connector configuration]
First, the configuration of the coaxial connector according to the embodiment of the present invention will be described.

(overall structure)
Referring to FIGS. 1 and 2, the coaxial connector 10 according to the embodiment of the present invention includes a cylindrical terminal assembly (hereinafter referred to as a jack) 1, a rectangular parallelepiped outer housing 2, and an insulating retainer 3. It is equipped with. Jack 1 is connected to the terminal of the coaxial cable Cb (see FIG. 2 or FIG. 3).

Referring to FIGS. 1 (C) or 1 (D) and FIG. 4, the outer housing 2 has a terminal accommodating chamber 2r into which the jack 1 can be introduced. Further, the outer housing 2 has a lock arm 2a at an upper portion that can be locked to a mating side outer housing (not shown). The retainer 3 can lock the jack 1 inside the terminal accommodating chamber 2r.

Referring to FIGS. 1 to 3, the jack 1 comprises a metal sleeve 11 and a central contact 12. Further, the jack 1 includes a cylindrical insulator 13 and a cylindrical external contact 14. In the metal sleeve 11, the terminal of the coaxial cable Cb from which the insulating sheath Wi has been peeled off can be introduced inside, and the outer conductor Wb can be crimped. The central contact 12 has its base end connected to the central conductor Wc.

Referring to FIGS. 1 to 3, the insulator 13 holds the central contact 12 in the center. The external contact 14 holds the insulator 13 inside. The external contact 14 continuously forms an external conductor connecting portion 141, a contact connecting portion 142, and a rectangular ring band 143.

Referring to FIGS. 1 to 3, the external conductor connecting portion 141 is formed on the proximal end side of the external contact 14. The outer conductor connecting portion 141 is inserted between the outer conductor Wb and the dielectric Di. Then, by crimping the shaft portion 11s of the metal sleeve 11, the jack 1 can be fixed to the terminal of the coaxial cable Cb, and the external conductor Wb and the external contact 14 can be electrically connected.

Referring to FIGS. 1 to 3, the contact connecting portion 142 is formed on the tip end side of the external contact 14. The contact connection unit 142 can be connected to an external contact on the other side (not shown). The contact connection portion 142 is composed of an open entry in which one or more notches are cut out on the outer periphery, but the contact connection portion 142 may be configured without a notch as shown in FIG. The ring band 143 is formed in the middle portion of the external contact 14. The annular band 143 projects in the outer peripheral direction of the external contact 14.

On the other hand, referring to FIG. 1C, the outer housing 2 has a housing lance 21 at the bottom. With reference to FIG. 1 (C) or FIG. 1 (D), when the jack 1 is inserted into the terminal accommodating chamber 2r with the contact connection portion 142 at the head, the annular band 143 pushes down the locking claw of the housing lance 21. can. In a state where the ring band 143 is in contact with the back wall of the terminal accommodating chamber 2r, the locking claw of the housing lance 21 is elastically restored, and the ring band 143 can be prevented from coming off.

Further, referring to FIG. 4B, the outer housing 2 has a pair of locking holes 2h and 2h. The pair of locking holes 2h and 2h communicate with the terminal accommodating chamber 2r and penetrate from one surface of the outer housing 2 toward the other surface.

On the other hand, referring to FIG. 2, the retainer 3 has a pair of locking claw pieces 3d and 3d that are bifurcated. The pair of locking claw pieces 3d / 3d can be inserted into the locking holes 2h / 2h of the outer housing 2. With reference to FIG. 1 (D) or FIG. 2, the locking claw piece 3d abuts on the other surface of the annular band 143 with the retainer 3 mounted on the outer housing 2 to prevent the annular band 143 from coming off. It has a partially arcuate locking piece 31d.

Referring to FIGS. 1 to 4, the coaxial connector 10 according to the embodiment has a jack 1 connected to the terminal of the coaxial cable Cb and an external housing 2 with a lock arm 2a having a terminal accommodating chamber 2r into which the jack 1 can be introduced. A coaxial connector is formed by a retainer 3 that locks the jack 1 inside the terminal accommodating chamber 2r, and a square ring band 143 projecting in the outer peripheral direction is provided in the middle portion of the external contact 14 so that the terminal accommodating chamber 2r Is provided with a housing lance 21 for preventing the annular band 143 from coming off, and the retainer 3 is provided with a locking piece 31d for preventing the annular band 143 from coming off, whereby the number of parts can be suppressed and the transmission characteristics can be improved.

(Composition of metal sleeve)
Next, the configuration of the metal sleeve 11 according to the embodiment will be described. Referring to FIGS. 1 to 3, the metal sleeve 11 is preferably made of a conductive cylindrical metal member, and includes a crimpable shaft portion 11s and a disk-shaped flange portion 11f. By compressing the shaft portion 11s from the outer peripheral direction thereof, the outer conductor Wb of the coaxial cable Cb can be crimped via the outer conductor connecting portion 141.

Referring to FIGS. 1 to 3, the flange portion 11f is formed at the end portion of the shaft portion 11s. The flange portion 11f can be fitted into the terminal accommodating chamber 2r (see FIG. 1C or FIG. 1D). With reference to FIG. 3, when the flange portion 11f is fixed to the base end portion of the external contact 14 and the flange portion 11f is introduced into the terminal housing chamber 2r (see FIGS. 1C or 1D). ), It is possible to suppress the deflection of the metal sleeve 11 toward the outer periphery with respect to the outer housing 2.

(Structure of central contact)
Next, the configuration of the central contact 12 according to the embodiment will be described. Referring to FIG. 3 (C) or FIG. 6 (C), the central contact 12 is preferably made of a conductive metal cylinder, and has a crimping portion 12c at the base end portion. By crimping the crimping portion 12c to the center conductor Wc of the coaxial cable Cb, the center contact 12 and the center conductor Wc can be electrically connected.

Referring to FIG. 3C or FIG. 6C, the central contact 12 according to the embodiment is composed of a so-called female contact having a cylindrical shape, whereas the central contact 12 is composed of a so-called male contact having a pin shape. You can also do it.

(Assembly method of terminal assembly)
Next, a method of assembling the jack 1 according to the embodiment will be described. First, referring to FIG. 6A, the insulating sheath Wi is peeled off from the end face of the coaxial cable Cb to a predetermined length, and the outer conductor Wb is peeled off from the end face of the dielectric Di by a predetermined length. The center conductor Wc is cut so as to project the center conductor Wc from the end face of the dielectric Di with a predetermined length (first step).

Next, with reference to FIG. 6 (B), as shown in FIG. 6 (A), the metal sleeve 11 is inserted into the terminal-processed coaxial cable Cb. In this case, the metal sleeve 11 is preferably moved to the insulating sheath Wi side of the coaxial cable Cb, and is arranged so that the flange portion 11f of the metal sleeve 11 faces the center conductor Wc side (second step). ..

Next, referring to FIG. 6C, the crimping portion 12c is crimped to the central conductor Wc of the coaxial cable Cb, and the central contact 12 is fixed to the central conductor Wc (third step). Next, with reference to FIG. 5 (A), with the insulator 13 incorporated inside the external contact 14 (see FIG. 5 (B)), with reference to FIG. 6 (D), behind the external contact 14. The center contact 12 is inserted into the inside of the insulator 13 (fourth step).

From the state shown in FIG. 6D, the central contact 12 is further inserted inside the insulator 13, and the outer conductor connecting portion 141 is inserted between the outer conductor Wb and the insulating sheath Wi (step 5). .. Next, the metal sleeve 11 is moved toward the external contact 14, and as shown in FIG. 6E, the flange portion 11f is abutted against the step between the external contact 14 and the external conductor connecting portion 141 (sixth step).

Next, from the state shown in FIG. 6 (E), as shown in FIG. 6 (F), the shaft portion 11s of the metal sleeve 11 is compressed from the outer peripheral direction (7th step). Then, a series of assembly processes are completed. In the state shown in FIG. 6 (F), the outer conductor Wb of the coaxial cable Cb is crimped via the outer conductor connecting portion 141 (see FIG. 3 (C)).

[Action of coaxial connector]
Next, the operation and effect of the coaxial connector 10 according to the embodiment will be described.

Referring to FIG. 1 or 2, since the coaxial connector 10 according to the embodiment includes an external housing 2 with a lock arm 2a that maintains a connection state with the mating connector, a jack 1 and a terminal such as a plug (not shown) are provided. The connection state with the assembly can be reliably maintained.

Further, referring to FIGS. 1 to 6, the external contact 14 is provided with a rectangular ring band 143 projecting in the outer peripheral direction in the intermediate portion, and the terminal accommodating chamber 2r is provided with a housing lance 21 for preventing the ring band 143 from coming off. By providing the retainer 3 with a locking piece 31d for preventing the annular band 143 from coming off, the coaxial connector 10 according to the embodiment suppresses the number of terminal assembly parts and the annular band, as compared with the prior art. Transmission characteristics can be improved by reducing the number.

Further, referring to FIGS. 1 to 3, the coaxial connector 10 according to the embodiment has an advantage that the external contact 14 can be easily manufactured by reducing the number of annular bands formed on the outer periphery of the external contact 14. There is.

Referring to FIGS. 1 to 3, since the metal sleeve 11 can be fitted to the terminal accommodating chamber 2r and has a flange portion 11f, the external housing 2 suppresses the deflection of the metal sleeve 11 toward the outer periphery. can.

1 Jack (terminal assembly)
2 External housing 2a Lock arm 2r Terminal storage chamber 10 Coaxial connector 11 Metal sleeve 11f Flange part 11s Shaft part 12 Center contact 13 Insulator 14 External contact 141 External conductor connection part Cb Coaxial cable Di dielectric Wb External conductor Wc Center conductor Wi Insulation sheath

Claims (3)

A central conductor, a dielectric surrounding the central conductor, an outer conductor covering the dielectric, and a cylindrical terminal assembly connected to the end of a coaxial cable having an insulating sheath covering the outer conductor.
An external housing having a terminal accommodating chamber into which the terminal assembly can be introduced and having a lock arm that can be locked to a mating external housing is provided.
The terminal assembly is
A metal sleeve in which the terminal of the coaxial cable from which the insulating sheath has been peeled off is introduced inside and the outer conductor is crimped,
With the center contact connecting the center conductor to the base end,
A cylindrical insulator that holds the center contact in the center,
With a cylindrical external contact that holds the insulator inside,
The external contact is formed on the proximal end side and has an external conductor connecting portion that can be freely connected to the external conductor.
The metal sleeve is
A cylindrical shaft portion to which the outer conductor of the coaxial cable is crimped via the outer conductor connecting portion, and a cylindrical shaft portion.
A coaxial connector formed at the end of the shaft portion and having a flange portion that can be fitted into the terminal accommodating chamber. The coaxial connector according to claim 1, wherein the external contact is a coaxial connector in which the external conductor connecting portion is inserted between the external conductor and the dielectric. The external contact is formed on the tip end side and has a contact connection portion that can be freely connected to the other side external contact.
The coaxial connector according to claim 1 or 2, wherein the contact connection portion is composed of an open entry having one or more notches cut out on the outer periphery.

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