Coaxial connector

Abstract

The present application provides a coaxial connector which can realize miniaturization. The coaxial plug (10) is provided with: 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 (51) accommodating the first connection base portion and an extension portion (52) accommodating the second connection base portion. The contact (1) has a pair of fixed terminals (11s, 11s) and a movable terminal (12s) rising from the end portion side of a metal plate (11t). A receiving chamber (31r) is provided in the first connection base portion (31), and a pair of fixed terminals and a movable terminal are arranged inside. The pair of fixed terminals are located at one set of vertices of an imaginary equilateral triangle into which the opposite side contact is fitted, and the movable terminal (12s) is located at another vertex of the above-mentioned imaginary equilateral triangle, and the contact surface of the movable terminal is arranged in a state of opposing the middle portion of the pair of fixed terminals.

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 configured 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 and protects the outer conductor.

[0004] For example, the conventional coaxial connector has a shell made of metal which becomes an outer contact. In addition, the coaxial connector has a shell body and a bellows-shaped contact. The insulating sheath of the coaxial cable is fixed to one end portion side of the shell. In addition, the outer conductor of the coaxial cable is electrically connected to one end portion side of the shell. In addition, the other end portion side of the shell is formed in a cylindrical shape (for example, refer to Patent Document 1).

[0005] According to Patent Document 1, the shell and the contact are electrically insulated by the shell body. The contact is disposed inside the shell body in a state of being surrounded in a circular ring shape by the outer contact of a part of the shell. The contact is integrally molded with the shell body by molding using synthetic resin. A disc portion is provided in the shell body, in which a cylindrical fitting portion protrudes in the plate thickness direction, and the contact is disposed in a contact housing chamber which is opened on one side of the disc portion.

[0006] The contact has a band-shaped metal plate, a base end portion side of which is a placement surface of the center conductor of the coaxial cable and is exposed to the surface of the shell body. On the tip end portion side of the metal plate, a pair of contact pieces are provided in an opposite manner from the metal plate in a substantially vertical direction. When the counterpart contact is inserted between the pair of contact pieces, the pair of contact pieces expand in a substantially horizontal direction in a direction away from each other, and the counterpart contact is clamped by the spring property (elasticity) of the approaching pair of contact pieces. Thus, the pair of contact pieces and the counterpart contact are more reliably in contact and electrically connected.

[0007] PRIOR ART DOCUMENTS

[0008] Patent Document 1: Japanese Patent Application Publication No. 2019-169361 SUMMARY

[0009] PROBLEMS TO BE SOLVED BY THE INVENTION

[0010] According to Patent Literature 1, the above-mentioned cylindrical fitting portion is capable of being inserted into the inside of a cylindrical housing formed in the counterpart coaxial connector. By inserting the fitting portion into the inside of the cylindrical housing, a cylindrical counterpart contact disposed in the center portion of the cylindrical housing and a pair of contact pieces disposed in the contact housing chamber are capable of being electrically connected.

[0011] As described above, the pair of contact pieces of the contact are configured to be displaced in a direction in which they are separated from each other in a substantially horizontal direction from opposite positions. In order to secure a margin for this displacement amount, the size of the contact housing chamber is increased, and further, the outer diameter of the cylindrical fitting portion is increased. In correspondence with this, the size of the ring-shaped outer contact that surrounds the fitting portion is also increased. That is, in the two-point contact configuration of the contact of the related art, there is a problem in that it is difficult to downsize the coaxial connector.

[0012] The present application has been achieved in view of the above-mentioned circumstances, and an object thereof is to provide a coaxial connector capable of further achieving downsizing by changing the configuration of a contact provided in the coaxial connector.

[0013] Means for solving the problem

[0014] The present application is a contact for a coaxial connector capable of being connected to a cylindrical counterpart contact, and has a configuration in which the contact is externally connected to the counterpart contact by three-point contact. The three-point contact type contact is configured by a pair of fixed terminals located in one set of vertices of an imaginary equilateral triangle that internally connects to the counterpart contact, and an elastic displacementable movable terminal located in the other vertex. Thus, compared with a coaxial connector that uses a two-point contact type contact that needs to be expanded in a direction in which the terminals are separated from each other, downsizing can be achieved.

[0015] (1) A coaxial connector according to an embodiment of the present application is 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

[0016] The coaxial connector has:

[0017] a contact capable of being connected to a cylindrical counterpart contact, and having a pair of fixed terminals and an elastic deformationable movable terminal that externally connect to the counterpart contact by three-point contact, the fixed terminals being erected from the end portion side of a strip-shaped metal plate;

[0018] a housing including a first connection base portion having a housing chamber that is open at one face side and capable of having the counterpart contact inserted therein, and in which a pair of the fixed terminals and the movable terminal are disposed, and a second connection base portion, a portion of which protrudes from the first connection base portion; and

[0019] A conductive shell having a cylindrical portion provided to open at the one face side and surrounding the first connecting base portion, and a gutter-like extension portion connected to the cylindrical portion and capable of internally housing the second connecting base portion.

[0020] (2) Preferably, a pair of the fixed terminals are located in one set of vertices of an imaginary equilateral triangle inscribed in the opposite side contact, the movable terminal is located in another vertex of the imaginary equilateral triangle, and is arranged in a state of elastically deforming in a direction along a straight line passing through the vertex and a middle portion of the pair of fixed terminals.

[0021] (3) Preferably, the contact is integrally formed with the housing, and has at least a setting surface capable of contacting the center conductor and formed by exposing a base end portion of the metal plate on a prescribed surface of the second connecting base portion, and a contact edge exposed to the housing chamber from among the pair of fixed terminals and capable of contacting the opposite side contact.

[0022] (4) Preferably, the coaxial connector of the present application further has a press-fit housing having a groove cut to be capable of pressing an outer periphery of the center conductor, capable of being inserted from an opening side of the housing chamber toward a prescribed portion of the second connecting base portion, and the extension portion of the shell includes a pair of first cylinders capable of pressing the press-fit housing to the second connecting base portion, and a pair of second cylinders capable of press-fitting the outer conductor.

[0023] Effects of the Invention

[0024] The coaxial connector of the present application has a structure of externally contacting the opposite side contact by three-point contact. A pair of fixed terminals function as contact edges against the opposite side contact, and do not require or can minimize a dimensional allowance for expanding in a horizontal direction toward separation from each other. Elastic displacement of the movable terminal, which is provided as only one, is mainly within a range of a direction toward a middle portion of the pair of fixed terminals and a direction opposite thereto. In the housing, by minimizing a thickness of the cylindrical portion surrounding the first connecting base portion, the coaxial connector can also be miniaturized. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The structure of the coaxial connector of an embodiment of the present application is an appearance view of a coaxial connector configured at a terminal end of a coaxial cable, as viewed from an upper surface side, which is arranged in opposition to an opposite side coaxial connector.

[0026] Figure 2 The structure of the coaxial connector of the embodiment is an appearance view of a coaxial connector configured at a terminal end of a coaxial cable, as viewed from a lower surface side.

[0027] Figure 3A 、 Figure 3B is a perspective view showing the structure of the coaxial connector of the embodiment, Figure 3A is a bottom view showing the coaxial connector constituted at the terminal of the coaxial cable, Figure 3B is a right side view of Figure 3A .

[0028] Figure 4 is a sectional view in the X-X direction of Figure 3A showing the structure of the coaxial connector of the embodiment.

[0029] Figure 5 showing the structure of the coaxial connector of the embodiment, is an appearance view corresponding to Figure 2 before crimping the terminal of the coaxial cable.

[0030] Figure 6 is an exploded assembly view showing the structure of the coaxial connector of the embodiment.

[0031] Figure 7 showing the structure of the housing provided to the coaxial connector of the embodiment, is an appearance view separately showing the contact and the housing integrally formed.

[0032] Figure 8A 、 Figure 8B are views showing the structure of the housing provided to 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.

[0033] Figure 9 is a sectional view in the A-A direction of Figure 4 showing the structure of the coaxial connector of the embodiment.

[0034] Figure 10 is an appearance view showing the structure of the press-fit housing provided to the coaxial connector of the embodiment.

[0035] Figure 11A 、 Figure 11B are front views showing the structure of the press-fit housing provided to 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.

[0036] Explanation of Reference Numerals

[0037] 1: contact;

[0038] 3: housing;

[0039] 5: shell;

[0040] 7: press-fitting housing;

[0041] 10: coaxial plug (coaxial connector);

[0042] 11s, 11s: pair of fixed terminals;

[0043] 11t: metal plate;

[0044] 12s: movable terminal;

[0045] 31: first connection base portion;

[0046] 31r: accommodation chamber;

[0047] 32: second connection base portion;

[0048] 51: cylindrical portion;

[0049] 52: extension portion;

[0050] Cb: coaxial cable;

[0051] Di: dielectric;

[0052] Wb: outer conductor;

[0053] Wc: center conductor;

[0054] Wi: insulating jacket. DETAILED DESCRIPTION

[0055] Hereinafter, a mode for carrying out the present application will be described with reference to the accompanying drawings.

[0056] [Structure of coaxial connector]

[0057] First, the structure of the coaxial connector of an embodiment of the present application will be described.

[0058] (Overall structure)

[0059] With reference to Figures 1 to 6 , the coaxial connector (hereinafter, referred to as a coaxial plug) 10 of an embodiment of the present application is constituted 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 outer conductor Wb such as a braided wire covering the dielectric Di, and an insulating jacket Wi covering the outer conductor Wb.

[0060] The coaxial plug 10 has a contact 1 based on three-point contact, a housing 3 including first and second connection base portions, and a shell 5 of electric conductivity. Further, the housing 3 has a block-shaped press-fit housing 7. Also, the shell 5 has a pair of first barrels 521, 521 and a pair of second barrels 522, 522.

[0061] The contact 1 is capable of electrically connecting the cylindrical center contact 2 that is an opposite-side contact and the center conductor Wc of the coaxial cable Cb (refer to Figure 1 ).

[0062] Refer to Figure 7 , the contact 1 has a strip-shaped metal plate 11t having a setting surface 321 at a base end portion, and a pair of fixed terminals 11s, 11s and a movable terminal 12s located at a 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, portions of the metal plate bent in a substantially perpendicular direction from a plane extending from the metal plate 11t form the pair of fixed terminals 11s, 11s and the movable terminal 12s, respectively. The center contact 2 is capable of being inserted in a space surrounded by the pair of fixed terminals 11s, 11s and the movable terminal 12s (refer to Figure 1 ).

[0063] The pair of fixed terminals 11s, 11s are disposed in opposition in a direction substantially perpendicular to a length direction in which the metal plate 11t extends. The movable terminal 12s is disposed in a state of being in opposition to intermediate portions of the pair of fixed terminals 11s, 11s. When the center contact 2 is inserted in 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 an outer periphery of the center contact 2 by three-point contact.

[0064] Refer 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 a level is lowered on an upper surface of the second connection base portion 32, and is capable of contacting the center conductor Wc. The center conductor Wc is placed on the setting surface 321, and by the press-fit housing 7 pressed toward the housing 3, the center conductor Wc is capable of being reliably electrically connected to the contact 1.

[0065] Refer to Figures 6 to 8A , 8B, the housing 3 includes a first connection base portion 31 having a disc portion and a second connection base portion 32 having a combined rectangular portion. The second connection base portion 32 is in a form of partially protruding from the 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) at a center portion of the disc portion.

[0066] With reference to Figure 2 or Fig. 3 and Figure 5 , the housing 31r has a form in which one face of the housing 3 is opened to enable the center contact 2 to be inserted. The housing 31r is formed in a substantially rectangular shape, and a pair of fixed terminals 11s, 11s and a movable terminal 12s are arranged inside thereof. The housing 31r has a pair of gaps 31g, 31g that expand outwardly from the bottom region of the rectangular shape. (Refer to Figure 9 ) Thereby, the housing 31r has a shape similar to a plus (+) on the upper surface of the disc portion of the first connection base 31. This is one of the structures for the purpose of deformation countermeasures or elastic maintenance in response to various environments of the disc portion of the first connection base 31 or the housing 31r.

[0067] With reference 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 disc portion of the first connection base 31. The cylindrical portion 51 is capable of housing the first connection base 31 of the housing 3.

[0068] The cylindrical portion 51 is capable of inserting the external contact 6 of the counterpart connector 20 described later inside thereof. (Refer to Figure 1 ) When the external contact 6 is inserted into the inside of the cylindrical portion 51, the shell 5 and the external contact 6 can be electrically connected. In addition, the contact 1 and the center contact 2 can be electrically connected.

[0069] With reference to Figures 1 to 6 , the extension portion 52 is configured to be connected to the cylindrical portion 51. The extension portion 52 has an eave-like structure connected to a part of the outer periphery of the cylindrical portion 51 and extending away from the outer periphery of the cylindrical portion 51. Furthermore, the second connection base 32 of the housing 3 can be housed inside the extension portion 52. (Refer to Figure 2 or Figure 5 ) In addition, the extension portion 52 functions to fix the coaxial cable Cb.

[0070] More specifically, the extension portion 52 has a pair of first barrels 521, 521 and a pair of second barrels 522, 522. The pair of first barrels 521, 521 are capable of pressing the crimping housing 7 against the second connection base 32, and further capable of crimping the center conductor Wc of the coaxial cable Cb to the setting surface 321 of the contact 1. The pair of second barrels 522, 522 are capable of crimping the outer conductor Wb from above the dielectric Di.

[0071] By crimping the outer conductor Wb surrounding the periphery of the dielectric Di by the pair of second barrels 522, 522, the outer conductor Wb and the shell 5 can be electrically connected. Thereby, the coaxial plug 10 can be fixed to the terminal of the coaxial cable Cb.

[0072] With referenceFigures 1 to 6 The extension portion 52 also has a bottom plate piece 52b that covers the opening on the other face side of the cylindrical portion 51 of the housing 3. That is, the first connection base portion 31 that constitutes 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 an inclined surface, and the side of the extension portion 52 on which the first and second barrels (521, 522) are formed is higher, and the end portion of the coaxial connector 10 is lower.

[0073] (Structure of the counterpart connector)

[0074] Next, referring to Figure 1 The structure of the receptacle (counterpart connector) 20 of the coaxial plug 10 of the embodiment will be described. The receptacle 20 of the embodiment is surface-mounted to a printed board 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.

[0075] The center contact 2 is associated with the main body portion 21 formed on a concentric circle thereof, and the lead terminal 2r of the center contact 2, and can be soldered and joined to a signal pattern in a wiring pattern of a printed board not shown. The outer contact 6 is associated with the main body portion 61 formed on a concentric circle of the main body portion 21 and having an upper surface opened, and the lead terminal 6r of the outer contact 6, and can be soldered and joined to a ground pattern in a wiring pattern of a printed board not shown.

[0076] 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, and thereby 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.

[0077] When the coaxial plug 10 and the receptacle 20 are connected, 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.

[0078] (Structure of the contact)

[0079] Next, referring to Figure 7 and Figure 3A , Figure 8B The structure of the contact 1 of the embodiment will be described. 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 made of a copper alloy, but is not limited to a copper alloy.

[0080] A pair of fixed terminals 11s, 11s is located in one set of vertices of an imaginary regular 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 regular triangle. Also, the contact surface of the movable terminal 12s is arranged in a state of opposing the intermediate portion of the pair of fixed terminals 11s, 11s. More specifically, the movable terminal 12s is arranged in a state of deforming elastically in a direction along a straight line passing through the vertex of the imaginary regular triangle where it is located and the intermediate portion of the pair of fixed terminals 11s, 11s.

[0081] When the center contact 2 of the socket 20 is inserted into the receiving chamber 31r of the first connection-use base portion 31, the outer periphery of the center contact 2 comes into contact with the ridge portions (contact rims) of the pair of fixed terminals 11s, 11s in the receiving chamber 31r, and also comes into contact with the movable terminal 12s. In this way, the contact 1 can achieve three-point contact with the center contact 2.

[0082] (Structure of the housing)

[0083] 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 synthetic resin having insulating properties, and the synthetic resin having insulating properties can be molded to obtain the housing 3 having the desired shape.

[0084] With reference to Figure 4 , in the coaxial plug 10, the distance from the contact 1 (metal plate 11t) to the bottom surface of the shell 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.

[0085] 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 housing 3 is substantially the same on the tip end portion and the base end portion side of the contact 1. That is, D2 ≈ Dl.

[0086] On the tip end portion and the base end portion side of the contact 1, 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.

[0087] (Structure of the shell)

[0088] Next, the structure of the housing 3 of the embodiment will be described with reference to Figures 1 to 6The structure of the shell 5 in the embodiment will be described. The shell 5 is preferably formed by molding a conductive unfolded plate, such as a metal plate, with a predetermined shape to obtain the desired shape. The shell 5 is preferably formed with a cylindrical portion 51 and an eaves-shaped extension portion 52.

[0089] Preferably, the pair of first cylinders 521, 521 and the pair of second cylinders 522, 522 are bent into an unfolded state at the extension portion 52. In addition, it is preferable to form the bottom plate 52b of the cylindrical portion 51 at the extension portion 52.

[0090] A pair of first cylinders 521, 521 can be bent into a press-fit housing 7 that surrounds and is installed on the second connecting base 32. By pressing the press-fit housing with the pair of first cylinders 521, 521, the center conductor Wc placed on the mounting surface 321 of the second connecting base 32 can be firmly pressed onto the mounting surface 321.

[0091] A pair of second cylinders 522, 522 can be bent to surround the outer conductor Wb surrounding the dielectric Di. Thus, the pair of second cylinders 522, 522 are crimped with the outer conductor Wb, electrically connecting the outer conductor Wb to the housing 5, and securing the coaxial connector 10 to the end of the coaxial cable Cb.

[0092] (Structure of the press-fit shell)

[0093] Next, refer to Figure 6 , Figure 9 , Figure 10 as well as Figure 11A , 11B The structure of the press-fit housing 7 according to the embodiment will be described. The press-fit housing 7 has a U-shaped groove 7s. The groove 7s is formed to press the outer periphery of the center conductor Wc. The press-fit housing 7 can be inserted from the opening side of the receiving chamber 31r toward the predetermined portion of the second connecting base 32. The predetermined portion has, for example, a structure for holding the press-fit housing 7 in the second connecting base 32.

[0094] A pair of spear-shaped members 7r, 7r are provided at one end of the press-fit housing 7. The pair of spear-shaped members 7r, 7r are arranged across the groove 7s. A pair of guide grooves 7g, 7g are provided between the pair of spear-shaped members 7r, 7r and the groove 7s. A pair of cuts 7n, 7n are provided between the guide grooves 7g, 7g and the spear-shaped members 7r, 7r. This allows for elastic deformation of the peripheral portion of the spear-shaped members 7r, 7r.

[0095] On the other hand, refer to Figure 6 or Figure 7A pair of steps 32d, 32d are formed on the second connecting base 32 of the housing 3 to engage the pair of spear-shaped members 7r, 7r of the press-fit housing 7. Additionally, a pair of pressing protrusions 32e, 32e are formed on the inner sides of the steps 32d, 32d, which rise obliquely from their base ends. Positioning protrusions 32p, 32p are formed between the steps 32d, 32d and the protrusions 32e, 32e and the connecting surface 32c. When the press-fit housing 7 is pressed into the second connecting base 32 via the engagement between the guide grooves 7g, 7g and the protrusions 32p, 32p, the spear-shaped members 7r, 7r are engaged on the steps 32d, 32d. Thus, the press-fit housing 7 is held in place at the second connecting base 32.

[0096] Reference Figure 11A This illustrates a state where the center conductor Wc is placed on the mounting surface 321 and the press-fit housing 7 is held at the bottom of the second connection base 32. In this state, the groove 7s of the press-fit housing 7 does not apply pressure to the center conductor Wc. Next, refer to... Figure 11B A pair of first cylinders 521, 521 are bent to surround the press-fit housing 7. As a result, the center conductor Wc on the mounting surface 321 is pressurized by the groove 7s, and the center conductor Wc is pressed against the mounting surface 321. At this time, a pair of spear-shaped members 7r, 7r of the press-fit housing 7 move from a pair of steps 32d, 32d to the planar area of ​​the raised portions 32e, 32e. Thus, through the deformation around the spear-shaped members 7r, 7r caused by a pair of cuts 7n, 7n, the press-fit housing 7 is firmly positioned by means of the engagement between the guide grooves 7g, 7g and the protrusions 32p, 32p of the second connecting base 32. Thus, the center conductor Wc can be connected to the contact 1.

[0097] 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.

[0098] The function of coaxial connectors

[0099] Next, the function and effects of the coaxial connector 10 in the embodiment will be explained.

[0100] Reference Figures 1 to 9The coaxial plug 10 of this embodiment has a three-point contact type contact 1 that is externally connected to the center contact 2 via a three-point contact. The three-point contact type contact 1 consists of a pair of fixed terminals located at one set of vertices of an imaginary equilateral triangle internally connected to the center contact 2, and a movable terminal located at the other vertex that is capable of elastic displacement. The elastic displacement of the movable terminal is mainly within the range of the direction toward the middle portion of the pair of fixed terminals and the opposite direction. As a result, compared with coaxial connectors using two-point contact type contacts that require extension in the direction of separation between the terminals, miniaturization can be achieved.

[0101] Reference Figure 4 In this embodiment, the coaxial plug 10 has a small difference (D1 and D2) between the distance between the contact 1 (metal plate 11t) and the housing 5 on the end and base sides of the contact 1, thereby suppressing impedance disturbances. As a result, the high-frequency band of the high-frequency signal transmitted to the coaxial plug 10 can be increased.

[0102] Reference Figure 11A , 11B From the moment the center conductor Wc is placed on the mounting surface 321 and the pressing housing 7 is held at the bottom of the second connecting base 32, the center conductor Wc is pressed against the mounting surface 321 by means of a pair of first cylinders 521, 521 and the pressing housing 7. In other words, the bottom of the groove 7s presses against the outer periphery of the center conductor Wc opposite to the mounting surface 321, thereby enabling the center conductor Wc to connect with the contact 1.

[0103] This invention enables the miniaturization of coaxial connectors by changing the contact structure of the contacts from a two-point contact type to a three-point contact type based on a pair of fixed terminals and a movable terminal.

Claims

1. A coaxial connector configured at the end of a coaxial cable, the coaxial cable having: a center conductor, a dielectric surrounding the center conductor, an outer conductor covering the dielectric, and an insulating sheath covering the outer conductor, wherein, The coaxial connector has: The contact, which can be connected to a cylindrical opposing contact, has a pair of fixed terminals that can be externally connected to the opposing contact via three-point contact and stand upright from the end of a strip of metal plate, and a movable terminal that can be elastically deformed. The pair of fixed terminals are square rods that are bent vertically from the plane of the strip of metal plate in a direction perpendicular to the extension direction of the strip of metal plate, and have ridges that contact the opposing contact. The movable terminal is configured to elastically deform toward the middle portion of the pair of fixed terminals. The housing includes a first connecting base and a second connecting base, the first connecting base having a receiving chamber with an opening on one side for insertion of the opposite contact, and the receiving chamber having a pair of fixed terminals and a movable terminal disposed therein, a portion of the second connecting base protruding from the first connecting base; as well as A conductive shell having a cylindrical portion and a gutter-shaped extension, the cylindrical portion being configured to open on one side and surround the first connecting base, the gutter-shaped extension being connected to the cylindrical portion and capable of internally accommodating the second connecting base.

2. The coaxial connector according to claim 1, wherein, The pair of fixed terminals are located at a set of vertices in an imaginary equilateral triangle inscribed inside the opposite contact. The movable terminal is located at another vertex of the imaginary equilateral triangle and is configured in an elastic deformation direction along a straight line passing through the vertex and the middle portion of the pair of fixed terminals.

3. The coaxial connector according to claim 1 or 2, wherein, The contact is integrally formed with the housing. The contact has at least the following features: A surface is formed that allows it to contact the central conductor, and exposes the base end of the metal plate on a predetermined surface of the second connecting base; and The contact edge is exposed in the receiving chamber in a pair of fixed terminals and is capable of contacting the opposite contact.

4. The coaxial connector according to claim 1 or 2, wherein, The coaxial connector also includes a pressing housing with a groove cut into it to press against the outer periphery of the central conductor, allowing it to be inserted from the opening side of the receiving chamber toward a predetermined portion of the bottom of the second connecting base. The extension portion of the shell includes: A pair of first cylinders, capable of pressing the pressed shell against the base of the second connecting element; and A pair of second cylinders, which are capable of crimping the outer conductor.

5. The coaxial connector according to claim 3, wherein, The coaxial connector also includes a pressing housing with a groove cut into it to press against the outer periphery of the central conductor, allowing it to be inserted from the opening side of the receiving chamber toward a predetermined portion of the bottom of the second connecting base. The extension portion of the shell includes: A pair of first cylinders, capable of pressing the pressed shell against the base of the second connecting element; and A pair of second cylinders, which are capable of crimping the outer conductor.

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