Coaxial connector

Abstract

The present application provides a coaxial connector capable of reducing harness processing procedures. The coaxial plug (10) has: a contact (1) based on three-point contact, a housing (3) having a first connection base portion (31) and a second connection base portion (32); and a shell (5) having a cylindrical portion accommodating the first connection base portion and an extension portion accommodating the second connection base portion and covering one side of the opening of the cylindrical portion with a bottom plate. In addition, the coaxial plug includes a crimping housing having a groove cut to be able to press the outer periphery of the center conductor, which can be inserted towards a specified portion of the second connection base portion. The contact has a setting surface that can be in contact with the center conductor, and the base end portion of the metal plate is exposed on the specified surface of the second connection base portion. The extension portion has a pair of first cylinders that can press the crimping housing against the second connection base portion. In addition, the extension portion has a pair of second cylinders that can crimp the outer conductor.

Description

TECHNICAL FIELD

[0001] The present application relates to a coaxial connector. In particular, it relates to a configuration of a coaxial connector which is a small coaxial connector configured at a terminal of a coaxial cable, and which has a shell which is electrically connected to an outer conductor of the coaxial cable at one end portion side and which is formed in a cylindrical shape at the other end portion side. BACKGROUND

[0002] By connecting the coaxial connector fixed to the terminal of the coaxial cable to the socket mounted to the printed board, it is possible to transmit a high frequency signal from the coaxial cable to the printed board. Alternatively, it is possible to transmit a high frequency signal from the printed board to the coaxial cable.

[0003] Generally, the coaxial cable is composed of a circular center conductor, a dielectric which surrounds the periphery of the center conductor, an outer conductor such as a braided wire which surrounds the periphery of the dielectric, and an insulating sheath which covers the outer conductor.

[0004] For example, the prior art coaxial connector goes through the processes of "coaxial cable dimension cutting" → "coaxial cable terminal processing (cable harness)" → "(shell bending) + (shell cover closing) + (center conductor crimping)" → "outer conductor crimping", until the completion of the cable harness (for example, refer to Patent Document 1).

[0005] The following describes the series of assembly processes of "(shell bending) + (shell cover closing) + (center conductor crimping)" of Patent Document 1. The cover shell is housed in the cylindrical portion of the shell which is linked to the cable clamp. The cable clamp has a pair of crimping cylinders, a pair of conductor cylinders, and a pair of insulating cylinders which extend in a direction perpendicular to the long side direction thereof. The cover shell has a contact housed in the inside thereof, and has a configuration for housing and fixing the terminal portion of the coaxial cable which has been subjected to the terminal processing. The contact includes a crimping blade which can be crimped and connected to the center conductor of the terminal portion of the coaxial cable. The cover shell includes a cover which can be bent. The cover can be bent together with the bending of the cable clamp of the shell which is disposed behind in the assembly process. When the terminal portion of the coaxial cable is housed in the cover shell, the cover of the cover shell is bent along with the bending of the cable clamp of the shell, and can press the terminal portion of the coaxial cable (the dielectric which covers the center conductor). Thus, the center conductor is crimped and connected to the crimping blade of the contact.

[0006] The cable clamp of the shell further sandwiches and fastens the cover shell by the pair of crimping cylinders. Thus, the crimped state of the center conductor and the contact is maintained. The cable clamp of the shell further crimps the outer conductor by the pair of conductor cylinders. Thus, the outer conductor is electrically connected to the shell. The cable clamp of the shell further crimps the pair of insulating cylinders to the insulating sheath. Thus, the coaxial connector is fixed at the terminal of the coaxial cable.

[0007] PRIOR ART DOCUMENTS

[0008] Patent Literature 1: Japanese Patent Application Laid-Open No. 2019-220253 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] According to Patent Literature 1, a pair of press-fit cylinders is fastened to the cap housing by a process of bending the cable clamp together with the cap of the cap housing, and thus, a state in which the center conductor is connected is achieved. Therefore, the harness processing process is still many, and there is room for further simplification. In addition, the harness that has passed through such a processing process has a problem in that it is difficult to reduce the manufacturing cost.

[0011] The present application was completed in view of such circumstances, and an object thereof is to provide a coaxial connector capable of reducing a harness processing process.

[0012] MEANS FOR SOLVING THE PROBLEMS

[0013] The present application uses a press-fit housing having a form in which a center conductor of a cable is placed on a setting surface of a contact provided at a prescribed portion of a housing, and having a groove cut so as to be able to press the outer periphery of the center conductor. The press-fit housing is held by a pair of press-fit cylinders (first cylinders) formed in the housing and is fastened. Thus, the center conductor can be reliably press-fit to the setting surface of the contact. Furthermore, according to such a structure, the harness processing process can be reduced compared to the past.

[0014] (1) A coaxial connector according to an embodiment of the present application is constituted at a terminal of a coaxial cable having a center conductor, a dielectric surrounding the center conductor, an outer conductor covering the dielectric, and an insulating jacket covering the outer conductor, and

[0015] The coaxial connector has:

[0016] a contact capable of being connected to a counterpart contact of a cylindrical shape, and having a pair of fixed terminals rising from a terminal portion side of a metal plate of a band shape and capable of being in contact with the counterpart contact by three-point contact, and a movable terminal capable of being elastically deformed;

[0017] a housing including a first connection base portion having a receiving chamber opened at one face side and capable of allowing the counterpart contact to be inserted, and a pair of the fixed terminals and the movable terminal being arranged inside, and a second connection base portion of which a part protrudes from the first connection base portion;

[0018] a conductive shell having a cylindrical portion provided to open at the one face side and surround the first connecting base portion, and a gutter-shaped extension portion connected to the cylindrical portion and capable of internally housing the second connecting base portion; and

[0019] a press-fit shell having a groove cut to press the outer periphery of the center conductor, capable of being inserted from the opening side of the housing chamber toward a prescribed portion of the second connecting base portion,

[0020] the contact has a setting surface capable of contacting the center conductor, and the base end portion side of the metal plate is exposed on a prescribed surface of the second connecting base portion to form

[0021] the extension portion of the shell includes:

[0022] a pair of first cylinders capable of pressing the press-fit shell against the second connecting base portion; and

[0023] a pair of second cylinders capable of press-fitting the outer conductor.

[0024] (2) Preferably, a pair of lance-shaped members configured across the groove is provided at one end portion of the press-fit shell, and a step capable of being caught by the pair of lance-shaped members is formed at the prescribed portion of the second connecting base portion.

[0025] (3) Preferably, one of a pair of the fixed terminals is located at one set of vertices of an imaginary equilateral triangle inscribed in the opposite-side contact, and the movable terminal is located at the other vertex of the imaginary equilateral triangle and is configured in a state in which the vertex and the intermediate portions of the pair of fixed terminals are opposed.

[0026] (4) Preferably, the contact is integrally formed with the shell, and the contact has at least: the setting surface that exposes the base end portion side of the metal plate on the prescribed surface of the second connecting base portion to form; and a contact rim that is exposed to the housing chamber in the pair of fixed terminals and is capable of contacting the opposite-side contact.

[0027] Inventive Effects

[0028] The coaxial connector of the present application includes a press-fit shell having a groove cut to press the outer periphery of the center conductor. The press-fit shell is capable of being held to the shell (second connecting base portion) via a lance-shaped member. A pair of first cylinders formed in the shell press the press-fit shell by bending processing, and are capable of press-fitting the center conductor to the setting surface of the contact. Thus, the harness processing procedure can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1The structure of the coaxial connector of the embodiment of the present application is an appearance view of the coaxial connector configured at the terminal end of the coaxial cable as viewed from the upper surface side, with the opposite-side coaxial connector being arranged in opposition.

[0030] Figure 2 The structure of the coaxial connector of the embodiment is an appearance view of the coaxial connector configured at the terminal end of the coaxial cable as viewed from the lower surface side.

[0031] Figure 3A 、 Figure 3B are each a view showing the structure of the coaxial connector of the embodiment, Figure 3A is a bottom view showing the coaxial connector configured at the terminal end of the coaxial cable, Figure 3B is Figure 3A a right side view of

[0032] Figure 4 is a sectional view of Figure 3A in the X-X direction.

[0033] Figure 5 The structure of the coaxial connector of the embodiment is an appearance view corresponding to Figure 2 showing a state before the terminal end of the crimped coaxial cable.

[0034] Figure 6 is an exploded assembly view showing the structure of the coaxial connector of the embodiment.

[0035] Figure 7 The structure of the housing provided in the coaxial connector of the embodiment is an appearance view separately showing the contact and the housing that are integrally formed.

[0036] Figure 8A 、 Figure 8B are each a view showing the structure of the housing provided in the coaxial connector of the embodiment, Figure 8A is a plan view showing the upper surface of the housing, Figure 8B is a plan view showing the lower surface of the housing.

[0037] Figure 9 is a sectional view of Figure 4 in the A-A direction.

[0038] Figure 10 is an appearance view showing the structure of the crimping housing provided in the coaxial connector of the embodiment.

[0039] Figure 11A 、 Figure 11Bis each front view showing the structure of the press-fit housing provided in the coaxial connector of the embodiment, Figure 11A shows a state before the press-fit housing is completely mounted to the housing, Figure 11B shows a state where the press-fit housing is completely mounted to the housing.

[0040] Figure 12 is an appearance view showing the assembly process of the coaxial connector of the above embodiment.

[0041] Explanation of Reference Numerals

[0042] 1: contact;

[0043] 3: housing;

[0044] 5: shell;

[0045] 7: press-fit housing;

[0046] 7s: slot;

[0047] 10: coaxial plug (coaxial connector);

[0048] 11s, 11s: pair of fixed terminals;

[0049] 11t: metal plate;

[0050] 12s: movable terminal;

[0051] 31: first connection base portion;

[0052] 31r: accommodation chamber;

[0053] 32: second connection base portion;

[0054] 51: cylindrical portion;

[0055] 52: extension portion;

[0056] 321: setting surface;

[0057] 521, 521: pair of first cylinders;

[0058] 522, 522: pair of second cylinders;

[0059] Cb: coaxial cable;

[0060] Di: dielectric;

[0061] Wb: outer conductor;

[0062] Wc: center conductor;

[0063] Wi: insulating sheath. DETAILED DESCRIPTION

[0064] The following describes a mode for carrying out the present application with reference to the drawings.

[0065] [Structure of coaxial connector]

[0066] First, the structure of a coaxial connector of an embodiment of the present application will be described.

[0067] (Overall structure)

[0068] With reference to Figures 1 to 6 , a coaxial connector (hereinafter referred to as a coaxial plug) 10 of an embodiment of the present application is provided at the terminal of a coaxial cable Cb. The coaxial cable Cb has a center conductor Wc, a dielectric Di surrounding the center conductor Wc, an external conductor Wb such as a braided wire covering the dielectric Di, and an insulating sheath Wi covering the external conductor Wb.

[0069] The coaxial plug 10 is provided with a contact 1 based on three-point contact, a housing 3 including first and second connection base portions, and a conductive shell 5. In addition, the housing 3 has a block-shaped press-fit housing 7. Further, the shell 5 has a pair of first barrels 521, 521 and a pair of second barrels 522, 522.

[0070] The contact 1 is capable of electrically connecting a cylindrical center contact 2 that is a counterpart contact and the center conductor Wc of the coaxial cable Cb (see Figure 1 ).

[0071] With reference to Figure 7 , the contact 1 has a band-shaped metal plate 11t having a setting surface 321 at the base end portion, and a pair of fixed terminals 11s, 11s and a movable terminal 12s located at the tip end portion side of the metal plate 11t. The pair of fixed terminals 11s, 11s and the movable terminal 12s stand from the tip end portion side of the metal plate 11t. In other words, the pair of fixed terminals 11s, 11s and the movable terminal 12s are respectively formed by portions of the metal plate bent in a substantially perpendicular direction from the plane of the metal plate 11t. The center contact 2 is capable of being inserted into a space surrounded by the pair of fixed terminals 11s, 11s and the movable terminal 12s (see Figure 1 ).

[0072] The pair of fixed terminals 11s, 11s are disposed in opposition in a direction substantially perpendicular to the length direction in which the metal plate 11t extends. The movable terminal 12s is disposed in a state of being in opposition to the intermediate portions of the pair of fixed terminals 11s, 11s. When the center contact 2 is inserted into the space surrounded by the pair of fixed terminals 11s, 11s and the movable terminal 12s, the pair of fixed terminals 11s, 11s and the movable terminal 12s are capable of externally contacting the outer periphery of the center contact 2 by three-point contact.

[0073] With reference to Figures 2 to 6, the contact 1 is integrally formed with the housing 3. The setting surface 321 of the contact 1 is exposed to a prescribed surface of the second connection base portion 32 described later. Here, the setting surface 321 is exposed to a connection surface 32c of which the upper surface of the second connection base portion 32 is lowered by one level, and can be in contact with the center conductor Wc. The center conductor Wc is placed on the setting surface 321, and by the press-fit housing 7 being pressed toward the housing 3, the center conductor Wc can be reliably electrically connected to the contact 1.

[0074] Referring to Figures 6 to 8A , 8B, the housing 3 includes a first connection base portion 31 having a circular disc portion and a second connection base portion 32 having a composite rectangular portion. The second connection base portion 32 is in a form that partially protrudes from the circular disc portion of the first connection base portion 31. The first connection base portion 31 has a receiving chamber 31r (refer to Figure 2 or Fig. 3) in the center portion of the circular disc portion.

[0075] Referring to Figure 2 or Fig. 3 and Figure 5 , the receiving chamber 31r is in a form that one surface of the housing 3 is open to enable the center contact 2 to be inserted. The receiving chamber 31r is formed in a substantially rectangular shape, and a pair of fixed terminals 11s, 11s and a movable terminal 12s are disposed inside thereof. The receiving chamber 31r has a pair of gaps 31g, 31g (refer to Figure 9 ) that expand outwardly from the bottom area of the rectangle. Thus, the receiving chamber 31r is in a shape similar to positive (+) on the upper surface of the circular disc portion of the first connection base portion 31. This is one of the structures aimed at deformation countermeasures or elastic maintenance in response to various environments of the circular disc portion of the first connection base portion 31 or the receiving chamber 31r.

[0076] Referring to Figure 5 , the shell 5 has a cylindrical portion 51 and an eave-like extension portion 52. The cylindrical portion 51 is configured to surround the circular disc portion of the first connection base portion 31. The cylindrical portion 51 can receive the first connection base portion 31 of the housing 3.

[0077] The cylindrical portion 51 can have the external contact 6 (refer to Figure 1 ) of the counterpart connector 20 described later inserted therein. When the external contact 6 is inserted into the inside of the cylindrical portion 51, the shell 5 can be electrically connected to the external contact 6. In addition, the contact 1 can be electrically connected to the center contact 2.

[0078] Referring to Figures 1 to 6 , the extension portion 52 is configured to be connected to the cylindrical portion 51. The extension portion 52 has a structure of an eave shape that is connected to a part of the outer periphery of the cylindrical portion 51 and extends away from the outer periphery of the cylindrical portion 51. Furthermore, the second connection base portion 32 of the housing 3 can be received in the inside of the extension portion 52 (refer to Figure 2 orFigure 5 ). In addition, the extension 52 acts on the fixation of the coaxial cable Cb.

[0079] More specifically, the extension 52 has a pair of first barrels 521, 521 and a pair of second barrels 522, 522. The pair of first barrels 521, 521 is capable of pressing the crimped housing 7 against the second connection base 32, and further capable of crimping the center conductor Wc of the coaxial cable Cb against the setting surface 321 of the contact 1. The pair of second barrels 522, 522 is capable of crimping the outer conductor Wb from above the dielectric Di.

[0080] By crimping the outer conductor Wb surrounding the dielectric Di by the pair of second barrels 522, 522, the outer conductor Wb is capable of electrically connecting with the shell 5. Thereby, the coaxial plug 10 is capable of being fixed to the terminal of the coaxial cable Cb.

[0081] Referring to Figures 1 to 6 , the extension 52 further has a bottom plate piece 52b covering the opening of the other face side of the cylindrical portion 51 of the housing 3. That is, the first connection base 31 constituting the disc portion is in a state of being housed by the bottom plate piece 52b and the cylindrical portion 51. Referring to Figure 4 , the bottom plate piece 52b is in an inclined surface, and the side of the extension 52 where the first and second barrels (521, 522) are formed is high, and the end portion of the coaxial connector 10 is low.

[0082] (Structure of the counterpart connector)

[0083] Next, referring to Figure 1 , the structure of the receptacle (counterpart connector) 20 of the coaxial plug 10 of the connection embodiment will be described. The receptacle 20 of the embodiment is surface-mounted to a printed substrate not shown. The receptacle 20 has a cylindrical center contact 2 that closes the end portion, a housing 4 made of a dielectric, and a ring-shaped outer contact 6.

[0084] The center contact 2 is related to the main body 21 formed on the concentric circle thereof, and the lead terminal 2r of the center contact 2, and is capable of soldering and joining the lead terminal 2r to a signal pattern in the wiring pattern of the printed substrate not shown. The outer contact 6 is related to the main body 61 formed on the concentric circle of the main body 21 and having the upper surface opened, and the lead terminal 6r of the outer contact 6, and is capable of soldering and joining the lead terminal 6r to a ground pattern in the wiring pattern of the printed substrate not shown.

[0085] The housing 4 is formed in a rectangular plate shape. The center contact 2 and the outer contact 6 are integrally molded by the housing 4, whereby the center contact 2 and the outer contact 6 are fixed. Inside the housing 4, a dielectric substance is filled, and the center contact 2 and the outer contact 6 are electrically insulated.

[0086] When the coaxial plug 10 is connected to the socket 20, the center conductor Wc present in the coaxial cable Cb can be connected to the center contact 2, and the outer conductor Wb present in the coaxial cable Cb can be connected to the outer contact 6. Thereby, a high-frequency signal can be transmitted from the coaxial cable Cb to the printed board, and a high-frequency signal can be transmitted from the printed board to the coaxial cable Cb.

[0087] (Structure of contact)

[0088] Next, the structure of the contact 1 of the embodiment will be described with reference to Figure 7 and Figure 3A , Figure 8B The contact 1 can be obtained in a desired shape based on three-point contact by blanking and bending processing of a metal plate having electrical conductivity. The contact 1 is preferably composed of a copper alloy, but is not limited to a copper alloy.

[0089] One pair of fixed terminals 11s, 11s is located in one set of vertices of an imaginary equilateral triangle inscribed in the center contact 2. On the other hand, the movable terminal 12s is located in another vertex of the above-mentioned imaginary equilateral triangle. Further, the contact surface of the movable terminal 12s is disposed in a state of facing the intermediate portions of the one pair of fixed terminals 11s, 11s. More specifically, the movable terminal 12s is disposed in a state of elastically deforming in a direction along a straight line passing through the vertex of the imaginary equilateral triangle where the movable terminal 12s is located and the intermediate portions of the one pair of fixed terminals 11s, 11s.

[0090] When the center contact 2 of the socket 20 is inserted into the accommodation chamber 31r of the first connection base portion 31, the outer periphery of the center contact 2 comes into contact with the ridge portions (contact rims) of the one pair of fixed terminals 11s, 11s in the accommodation chamber 31r, and comes into contact with the movable terminal 12s. In this way, the contact 1 can achieve three-point contact with the center contact 2.

[0091] (Structure of housing)

[0092] Next, the structure of the housing 3 of the embodiment will be described with reference to Figures 2 to 8A , 8B. The housing 3 is preferably composed of a synthetic resin having insulating properties, and the synthetic resin having insulating properties can be molded to obtain the housing 3 in a desired shape.

[0093] With reference to Figure 4 , in the coaxial plug 10, the distance of the contact 1 (metal plate 11t) from the bottom surface of the housing 5 is substantially the same on the tip end portion side and the base end portion side of the contact 1. In order to facilitate such a feature, the bottom plate piece 52b of the cylindrical portion 51 has the inclined surface as described above.

[0094] More specifically, the difference between the distance D2 between the tip end portion side of the contact 1 and the bottom surface of the shell 5 and the distance Dl between the base end portion side of the contact 1 and the bottom surface of the shell 5 is made extremely small. The wall thickness of the shell 3 is substantially the same on the tip end portion side and the base end portion side of the contact 1. That is, D2 « Dl.

[0095] On the tip end portion side and the base end portion side of the contact 1, with respect to the distance between the contact 1 (metal plate 11t) and the shell 5, by making the difference between the tip end portion side and the base end portion side of the contact 1 small, the disturbance of the impedance can be suppressed. Thereby, the high frequency band of the high frequency signal transmitted to the coaxial plug 10 can be increased. For example, the VSWR (Voltage Standing Wave Ratio) can be suppressed to less than "1.5" up to 60 GHz.

[0096] (Structure of the shell)

[0097] Next, the structure of the shell 5 of the embodiment will be described with reference to Figures 1 to 6 The shell 5 is preferably obtained by performing a molding process on a spread plate of a metal plate or the like processed into a prescribed outer shape to obtain the shell 5 of the desired shape. The shell 5 is preferably molded on the cylindrical portion 51 and the gutter-shaped extension portion 52.

[0098] It is preferable to bend and mold the pair of first cylinders 521, 521 and the pair of second cylinders 522, 522 into a spread state at the extension portion 52. In addition, it is preferable to mold the bottom plate piece 52b of the cylindrical portion 51 at the extension portion 52.

[0099] The pair of first cylinders 521, 521 can be bend-processed to surround the crimp shell 7 mounted to the second connection base portion 32. By the pressing of the pair of first cylinders 521, 521 on the crimp shell, the center conductor Wc placed on the setting surface 321 of the second connection base portion 32 can be firmly crimped to the setting surface 321.

[0100] The pair of second cylinders 522, 522 can be bend-processed to surround the outer conductor Wb around the periphery of the dielectric Di. Thereby, the pair of second cylinders 522, 522 are crimped to the outer conductor Wb, electrically connect the outer conductor Wb to the shell 5, and fix the coaxial connector 10 to the terminal of the coaxial cable Cb.

[0101] (Structure of the crimp shell)

[0102] Next, the structure of the crimp shell 7 of the embodiment will be described with reference to Figure 6 , Figure 9 , Figure 10 and Figure 11A , 11BThe structure of the press-fit housing 7 of the embodiment will be described. The press-fit housing 7 has a groove 7s cut in a U shape. The groove 7s is formed so as to be able to press the outer periphery of the center conductor Wc. The press-fit housing 7 is able to be inserted from the opening side of the accommodation chamber 31r toward a prescribed portion of the second connection base portion 32. The prescribed portion has, for example, a structure for holding the press-fit housing 7 to the second connection base portion 32.

[0103] A pair of lance members 7r, 7r are provided at one end portion of the press-fit housing 7. The pair of lance members 7r, 7r are disposed across the groove 7s. A pair of guide grooves 7g, 7g are provided between the pair of lance members 7r, 7r and the groove 7s. A pair of notches 7n, 7n are provided between the guide grooves 7g, 7g and the lance members 7r, 7r. Thus, the periphery of the lance members 7r, 7r is allowed to deform with elasticity.

[0104] On the other hand, referring to Figure 6 or Figure 7 , a pair of steps 32d, 32d that are able to engage the pair of lance members 7r, 7r of the press-fit housing 7 are formed in the second connection base portion 32 of the housing 3. In addition, a pair of press protrusions 32e, 32e that are inclinedly raised from the base end of the steps 32d, 32d are formed inside the pair of steps 32d, 32d. Positioning protrusions 32p, 32p are formed between the pair of steps 32d, 32d and the protrusions 32e, 32e and the connection surface 32c. When the press-fit housing 7 is pressed into the second connection base portion 32 via the fitting between the guide grooves 7g, 7g and the protrusions 32p, 32p, the lance members 7r, 7r are engaged with the steps 32d, 32d. Thus, the press-fit housing 7 is held to the second connection base portion 32.

[0105] Referring to Figure 11A , the state in which the center conductor Wc is placed on the placement surface 321 and the press-fit housing 7 is held to the second connection base portion 32 is shown. In this state, the groove 7s of the press-fit housing 7 does not pressurize the center conductor Wc. Next, referring to Figure 11B , the pair of first cylinders 521, 521 are bent so as to surround the press-fit housing 7. Thus, the center conductor Wc on the placement surface 321 is pressurized by the groove 7s, and the center conductor Wc is crimped to the placement surface 321. At this time, the pair of lance members 7r, 7r of the press-fit housing 7 are moved from the pair of steps 32d, 32d to the planar regions of the protrusions 32e, 32e. Thus, the press-fit housing 7 is firmly positioned by the fitting between the guide grooves 7g, 7g and the protrusions 32p, 32p of the second connection base portion 32, by virtue of the deformation of the periphery of the lance members 7r, 7r by the pair of notches 7n, 7n. Thus, the center conductor Wc is able to be connected to the contact 1.

[0106] In this embodiment, the coaxial plug 10 uses a pressing housing 7 and a pair of first cylinders 521, 521 that press the pressing housing 7 to press and crimp the center conductor Wc onto the mounting surface 321. Thus, the center conductor Wc is reliably connected to the contact 1.

[0107] The function of coaxial connectors

[0108] Reference Figure 12 The assembly process of the coaxial connector 10 according to the embodiment will be explained, and the function and effect of the coaxial connector 10 according to the embodiment will also be explained.

[0109] With the first pair of tubes 521, 521 and the second pair of tubes 522, 522 deployed (see reference) Figure 5 And with a portion of the bottom of the second cylinders 522 connected to the carrier C of the metal plate, the housing 3 with contact 1 is placed on the unfolded housing 5 for assembly. Additionally, the press-fit housing 7 is held at the second connecting base 32 (see reference). Figure 11A ).

[0110] Next, the center conductor Wc of the coaxial cable Cb, which has undergone termination treatment, is placed on the mounting surface 321 (refer to...). Figure 8B And the outer conductor Wb of the terminated coaxial cable Cb is placed at the bottom of the second tube 522, 522 (see reference). Figure 5 ).

[0111] Regarding the press-fit shell 7, from Figure 11A From the state shown, the pair of first cylinders 521, 521 are bent in such a way that they are wound around the bottom 32 of the second connecting base (see reference). Figure 11B Thus, by pressing the center conductor Wc against the mounting surface 321 through the pressing housing 7, the center conductor Wc can be reliably connected to the contact 1.

[0112] Additionally, the pair of second cylinders 522, 522 are bent in such a way that they are wound around the outer conductor Wb surrounding the dielectric Di. This causes the pair of second cylinders 522, 522 to be pressed against the outer conductor Wb, electrically connecting the outer conductor Wb to the housing 5, and securing the coaxial plug (coaxial connector) 10 to the end of the coaxial cable Cb. Furthermore, the timing of separating the housing from the carrier C can be varied depending on the environment of the assembly process.

[0113] As described above, a series of assembly work is realized. The coaxial plug 10 of the embodiment can press the crimped cable clamp using the press-fit housing 7 held on the second connection base portion 32 using the pair of first barrels 521, 521 without a process of bending the cable clamp. Thus, the center conductor Wc placed on the setting surface 321 can be reliably connected to the contact 1 by crimping the center conductor Wc. Thus, the coaxial plug 10 of the embodiment can reduce the harness processing process and contribute to reduction of manufacturing cost.

[0114] Also, referring to Figures 1 to 9 , the coaxial plug 10 of the embodiment has the contact 1 of a three-point contact type that is externally tangent to the center contact 2 by three-point contact. The contact 1 of the three-point contact type is composed of a pair of fixed terminals located in one set of vertices of an imaginary equilateral triangle internally tangent to the center contact 2, and a movable terminal located in another vertex that can be elastically displaced. The elastic displacement of the movable terminal is mainly in the range of the direction toward the middle portion of the pair of fixed terminals and the opposite direction thereof. Thus, compared with a coaxial connector using a two-point contact type contact that needs to expand in the direction of separation of the terminals from each other, miniaturization can be realized.

[0115] Referring to Figure 4 , the coaxial plug 10 of the embodiment sets the difference in distance between the contact 1 (metal plate 11t) and the housing 5 to be small at the tip end portion side and the base end portion side, and thus, disturbance of impedance can be suppressed. Thus, the high frequency band of the high frequency signal transmitted to the coaxial plug 10 can be increased.

[0116] Referring to Figure 11A , 11B From the state where the center conductor Wc is placed on the setting surface 321 and the press-fit housing 7 is held on the second connection base portion 32, the center conductor Wc is crimped to the setting surface 321 by means of the pair of first barrels 521, 521 and the press-fit housing 7. In other words, the bottom portion of the groove 7s presses the outer periphery of the center conductor Wc opposite to the setting surface 321, and thus, the center conductor Wc can be connected to the contact 1.

Claims

1. A coaxial connector configured at a terminal of a coaxial cable having a center conductor, a dielectric surrounding the center conductor, an outer conductor covering the dielectric, and an insulating jacket covering the outer conductor, wherein the coaxial connector has: a contact capable of connecting with a cylindrical counterpart contact, and having a pair of fixed terminals erected from an end portion side of a band-shaped metal plate, capable of externally tangling with the counterpart contact by three-point contact, and a movable terminal capable of elastically deforming, the pair of fixed terminals being in a quadrangular rod shape bent from a plane of the band-shaped metal plate in a direction perpendicular to an extending direction of the band-shaped metal plate in a manner of being disposed in opposition in the direction, and having a ridge portion contacting the counterpart contact, the movable terminal being disposed in a state of being in opposition to an intermediate portion of the pair of fixed terminals. a housing including a first connection base portion having a receiving chamber opened at one face side to be capable of inserting the counterpart contact, and having the pair of fixed terminals and the movable terminal disposed inside, and a second connection base portion of which a part protrudes from the first connection base portion; a conductive shell having a cylindrical portion provided to be opened at the one face side and surrounding the first connection base portion, and a gutter-shaped extending portion connected to the cylindrical portion to be capable of receiving the second connection base portion inside; and a press shell having a groove cut to press an outer circumference of the center conductor, capable of being inserted from an opening side of the receiving chamber toward a prescribed portion of the second connection base portion, the contact has a disposition face capable of contacting the center conductor, and a base end portion of the metal plate is exposed on an upper face of a part of the second connection base portion to be formed, the extending portion of the shell includes: a pair of first cylinders capable of pressing the press shell to the second connection base portion; and a pair of second cylinders capable of press-contacting the outer conductor.

2. The coaxial connector according to claim 1, wherein a pair of lances disposed across the groove is provided at an end portion of the press shell, a step capable of being caught by the pair of lances is formed at the prescribed portion of the second connection base portion.

3. The coaxial connector according to claim 2, wherein the pair of fixed terminals are located in one set of vertices of an imaginary equilateral triangle internally tangling with the counterpart contact, the movable terminal is located at another vertex of the imaginary equilateral triangle, and is disposed in a state of being in opposition to the intermediate portion of the pair of fixed terminals.

4. The coaxial connector according to claim 2, wherein the contact is integrally formed with the housing, the contact has at least: the disposition face exposing the base end portion side of the metal plate on the upper face of the part of the second connection base portion to be formed; and ​ ​ ​ A contact edge is exposed to the accommodation chamber in the pair of the fixed terminals and is capable of contacting the counterpart contact.

5. The coaxial connector according to claim 3, wherein the contact is integrally formed with the housing, the contact has at least: the setting surface which makes the base end portion side of the metal plate exposed on the upper surface of a portion of the second connection base portion; and a contact edge which is exposed to the accommodation chamber in the pair of the fixed terminals and is capable of contacting the counterpart contact.

6. The coaxial connector according to claim 1, wherein the press-fit housing includes a pair of lances disposed across the slot at one end portion thereof and a pair of guide grooves formed between the pair of lances and the slot, the prescribed portion of the second connection base portion includes a step provided in a manner of being latched with the pair of lances and a protrusion guided by the pair of guide grooves formed between the step and the setting surface.

7. The coaxial connector according to claim 6, wherein the contact is integrally formed with the housing, the contact has at least: the setting surface which makes the base end portion side of the metal plate exposed on the upper surface of a portion of the second connection base portion; and a contact edge which is exposed to the accommodation chamber in the pair of the fixed terminals and is capable of contacting the counterpart contact, the first barrel is press-fitted into the press-fit housing by positioning by fitting of the pair of guide grooves of the press-fit housing and the protrusion at the prescribed portion of the second connection base portion, and the outer periphery of the center conductor is pressed by the slot.

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