WO2006087953A1

WO2006087953A1 - Coaxial connector and communication device

Info

Publication number: WO2006087953A1
Application number: PCT/JP2006/302151
Authority: WO
Inventors: Hiroki Wakamatsu; Yuichi Maruyama; Chikara Uratani
Original assignee: Murata Manufacturing Co., Ltd.
Priority date: 2005-02-18
Filing date: 2006-02-08
Publication date: 2006-08-24

Abstract

A coaxial connector that can be connected to a receptacle in mechanically and electrically stable conditions and is low in height, and a communication device. A coaxial connector in which two longitudinal slits (31) are arranged at the lower section of a tubular section (24) that is in contact with an external conductor of a receptacle, the slits being in the direction parallel to the direction of insertion in a receptacle. A longitudinal cutout (33) is formed in the lower part of the tubular section (24), the cutout starting at the lower end of the tubular section (24) and being parallel to the direction of insertion in the receptacle. Further, a lateral cutout (24b) is provided from the longitudinal cutout (33) in the direction orthogonal to the direction of insertion in the receptacle. The lateral cutout (24b) is provided left-right symmetric relative to the longitudinal cutout (33).

Description

Specification

Coaxial connector and communication device

Technical field

TECHNICAL FIELD [0001] The present invention relates to a coaxial connector provided with a coaxial cable, and more particularly to a coaxial connector and a communication device used as a component part of a portable communication device.

Background art

[0002] In recent years, communication devices having a very small size and a small thickness are spreading. Along with this, electronic components used in these devices are also small and short, and even coaxial connectors are required to be small and low-profile. As described in Patent Document 1, a conventional coaxial connector shown in FIG. 17 is known. The coaxial connector 60 includes a metal housing 61, a socket 62, a pushing 63, and a coaxial cable 66 !.

[0003] The woozing 61 has a cylindrical portion 64 that contacts the outer conductor 82 of the receptacle 81, and is electrically connected to the outer conductor 67 of the coaxial cable 66. The socket 62 is substantially C-shaped, contacts the central conductor 83 of the receptacle 81 so as to wrap around, and is connected to the central conductor 68 of the coaxial cable 66. The socket 62 can shorten the cylindrical portion 64 of the housing 61 in the axial direction, and contributes to a reduction in the height of the coaxial connector 60. The pushing 63 has an accommodation hole 63 a for accommodating the socket 62, and is mounted in the cylindrical portion 64 of the housing 61.

In addition, several vertical slits 65 are provided in a direction parallel to the insertion direction of the receptacle 81 at the lower part of the cylindrical portion 64 of the housing 61. By providing the vertical slit 65, when the receptacle 81 and the coaxial connector 60 are fitted, the cylindrical portion 64 can be slightly opened in the radially outward direction, and a reaction force in the radially inward direction can be obtained. When the convex portion provided in the circumferential direction on the inner side of the lower end of the cylindrical portion 64 reaches the receptacle lock groove 84, the convex portion fits into the receptacle lock groove 84 due to the reaction force of the cylindrical portion 64, and the coaxial connector 60 A moderate lock feeling of the receptacle 81 is obtained.

On the other hand, when the vertical slit 65 is not provided, the above-described convex portion hits the outer conductor 82 when the cylindrical portion 64 is inserted into the outer conductor 82 of the receptacle 81. When it is inserted forcibly, the cylindrical part 6 4 may be destroyed.

[0006] Further, as the longitudinal slit 65 is lengthened, the spring stiffness in the radial direction of the tubular portion 64 becomes weaker, and the tubular portion 64 is destroyed. At the same time, however, the contact force decreases due to a decrease in rigidity, so the length of the vertical slit 65 must be selected according to the shape and material of the housing 61.

[0007] However, in recent years, the length of the vertical slit 65, which has been increasingly demanded to reduce the height, cannot be sufficiently secured. For this reason, there was a problem that the mating insertion force was too strong, or stress that exceeded the elastic limit of the material was generated while the mating was repeated, and the contact force was not stabilized by plastic deformation.

Further, as shown in FIG. 18, the socket 62 has a spring contact shape in which a flat spring having a constant width is curved so as to have a C-shaped cross section in order to reduce size and height. Part 62a. When the center conductor 83 of the receptacle is press-fitted, the spring contact portion 62a is displaced outward in the radial direction, and an arbitrary portion of the inner peripheral surface of the spring contact portion 62a is pressed against the outer peripheral surface of the center conductor 83. That is, the C-shaped spring contact portion 62a wraps around the cylindrical central conductor 83 of the mating receptacle. However, this socket 62 has a problem that the contact force of the contact is not stable because the contact position between the spring contact portion 62a and the cylindrical center conductor 83 is not constant.

Patent Document 1: Japanese Patent Laid-Open No. 11-307158

Disclosure of the invention

Problems to be solved by the invention

Therefore, an object of the present invention is to provide a coaxial connector and a communication device that can be coupled to a receptacle in a mechanically and electrically stable state and that are short.

Means for solving the problem

In order to achieve the above object, a coaxial connector according to the present invention includes:

A coaxial cable having a center conductor and an outer conductor;

A housing having a cylindrical portion in contact with the outer conductor of the receptacle and electrically connected to the outer conductor of the coaxial cable;

The center conductor of the receptacle is press-fitted and expands outward in the radial direction. A spring contact portion that is pressed against the peripheral surface, and a connection that is connected to the central conductor of the coaxial cable that is drawn out integrally with the spring contact portion force and is bent in a direction substantially perpendicular to the central axis direction of the spring contact portion A socket having a portion;

A housing having a housing hole for housing the socket, and a bushing mounted in a cylindrical portion of the housing;

A lower end force of the cylindrical portion is provided at a lower portion of the cylindrical portion of the housing, and a vertical cut is provided in a direction substantially parallel to a press-fitting direction of the central conductor of the receptacle, and the central conductor of the receptacle is formed from the vertical cut. A transverse cut was made in a direction substantially perpendicular to the press-in direction of

It is characterized by.

In the coaxial connector according to the present invention, an insertion portion of the coaxial cable is provided at the upper portion of the tubular portion, a vertical cut is provided below the insertion portion, and the horizontal cut is based on the vertical cut. It is preferable that it is provided symmetrically!

[0012] Further, a vertical slit may be provided in the lower part of the cylindrical part in a direction substantially parallel to the press-fitting direction of the central conductor of the receptacle from the lower end of the cylindrical part.

[0013] Further, in the coaxial connector according to the present invention, the spring contact portion of the socket has a substantially C-shaped cross section, and n contacts are arranged on the outer peripheral surface of the central conductor of the receptacle in the circumferential direction. It is preferable to have n—1 tunes, as you have. Since the n contacts between the spring contact portion of the socket and the center conductor of the receptacle can always be arranged at a fixed position, the contact force of the contact can be stabilized. As a result, the coaxial cable can be coupled to the receptacle in a mechanically and electrically stable state, and a low-profile coaxial connector can be obtained. In particular, when the first and second contacts are arranged at an interval of about 120 ° between the socket spring contact portion and the receptacle center conductor force, the spring contact portion is a simple structure having two curved portions. It becomes a structure and becomes a coaxial connector with excellent productivity.

[0014] Furthermore, the spring contact portion of the socket has a distance L1 to the first contact point that is a central force fulcrum of the central conductor of the receptacle and a center of the receptacle in a state before the central conductor of the receptacle is press-fitted. Central force of the conductor Distance L2 to the second contact and the central force of the central conductor of the receptacle Relationship force with the distance L3 to the third contact L1>L2> L3. It is preferable that LI≤R when the radius of the central conductor of R is R.

[0015] In addition, an insulating sheet having a thickness of 0.15 mm or less may be disposed between the connection portion where the socket and the central conductor of the coaxial cable are connected and the lid portion of the housing.

The communication device according to the present invention includes the coaxial connector having the above-described characteristics, and can achieve a reduction in height.

The invention's effect

[0017] According to the present invention, since the transverse cut is provided in the lower portion of the cylindrical portion of the housing in a direction substantially perpendicular to the press-fitting direction of the central conductor of the receptacle, the spring rigidity in the radial direction of the cylindrical portion is provided. It becomes weak and the deformation of the housing when it is inserted into and removed from the receptacle is within the elastic deformation range. As a result, it is possible to avoid a situation where the contact force due to the destruction or plastic deformation of the housing is lost, and to obtain a coaxial connector that can connect the coaxial cable to the receptacle in a mechanically and electrically stable state and that is short. be able to.

Brief Description of Drawings

FIG. 1 is an exploded perspective view showing an embodiment of a coaxial connector according to the present invention.

[Fig. 2] Partial development of the housing.

FIG. 3 is a partial perspective view of the housing.

FIG. 4 is a perspective view of the lower portion of the cylindrical portion of the housing.

FIG. 5 is a perspective view from another angle of FIG.

FIG. 6 is a partially enlarged view of FIG.

FIG. 7 is a graph showing the relationship between the cutting angle Θ and the insertion force.

FIG. 8 is an assembled perspective view of the coaxial connector shown in FIG.

[Fig. 9] IX—IX cross section of FIG.

FIG. 10 is an enlarged perspective view of the socket and the central conductor of the receptacle.

FIG. 11 is a perspective view showing a fitting state between the socket and the center conductor of the receptacle.

[Fig. 12] (A) shows the shape of the spring contact before mating with the receptacle center conductor (optimal shape)

(B) is a plan view showing the shape of the spring contact portion after fitting.

[FIG. 13] (A), (B), and (C) are explanatory diagrams for explaining the optimum shape of the spring contact portion, respectively. [FIG. 14] A variation of the socket is shown. (A) is a plan view showing the shape (optimum shape) of the spring contact portion before mating with the receptacle center conductor, and (B) is the spring contact after mating. The top view which shows the shape of a part.

[FIG. 15] Another variation of the socket is shown, (A) is a plan view showing the shape (optimum shape) of the spring contact portion before mating with the central conductor of the receptacle, and (B) is after mating The top view which shows the shape of a spring contact part.

FIG. 16 is a block diagram showing a high-frequency circuit of a communication device according to the present invention.

FIG. 17 is an exploded perspective view showing an example of a conventional coaxial connector.

FIG. 18 is an explanatory view showing an example of a socket in a conventional coaxial connector.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a coaxial connector and a communication device according to the present invention will be described in detail with reference to the accompanying drawings.

[0020] As shown in FIG. 1, the coaxial connector 1 includes a coaxial cable 26, a housing 21 having a springy metal force, a bushing 22 made of an insulating resin fitted in the housing 21, and a bushing. The socket 2 and the insulating sheet 20 also have a metal force having a spring property held by 22.

The housing 21 includes a cylindrical portion 24 that contacts the outer conductor 42 of the receptacle 41, a lid portion 25 that covers the upper opening of the cylindrical portion 24, and an outer conductor of the coaxial cable 26 that is drawn from the cylindrical portion 24. 2 6a A pair of arc-shaped covers 27 covering both sides of the cover 27, a force pulled out of the cover 25 and crimped onto the cover 27 to grip the coaxial cable 26 from above the cover 27 Has a shim 28. A portion of the force squeeze portion 28 is a claw portion 28 a that is force squeezed onto the outer skin 26 b of the coaxial cable 26. In the cylindrical part 24 of the housing 21, the upper opening force is also inserted and fixed.

[0022] Under the cylindrical portion 24, two vertical slits 31 are provided in a direction parallel to the insertion direction of the receptacle 41. Further, the cylindrical portion 24 is provided with a transverse cut 24b in a direction substantially perpendicular to the receptacle insertion direction. This lateral cut 24b weakens the spring stiffness in the radial direction of the cylindrical portion 24, and the deformation of the housing 21 when inserted into and removed from the receptacle 41 is within the elastic deformation range. In more detail, FIG. 2 is a development view showing the outer surface of the housing 21. However, for the sake of simplicity, the lid portion 25 and the force shim portion 28 are omitted. The cylindrical portion 24 is rounded and the cover portion 27 is bent along the dotted line L to obtain the one shown in FIG.

FIG. 4 shows a lower portion of the cylindrical portion 24 shown in FIG. Two arm portions 24c are formed by the horizontal cuts 24b. In FIGS. 2 to 4, the gap (gap) of the transverse notch 24b and the gap (gap) 33 where the ends C and D of the two arm portions 24c face each other are easily divided. The force expressed as being away to do is actually in contact. In other words, the horizontal cut 24b is only cut by a press die along the cut line.

The gap 33 functions as a longitudinal cut provided in a direction parallel to the press-fitting direction of the center conductor 43 of the receptacle 41 from the lower end of the cylindrical portion 24. The vertical cut 33 is located at the center of the horizontal cut 24b, and the vertical cut 33 is substantially connected to the horizontal cut 24b. That is, in the present embodiment, the lower portion of the cylindrical portion 24 of the housing 21 is provided with a longitudinal cut 33 in a direction parallel to the press-fitting direction of the central conductor 43 of the receptacle 41 from the lower end of the cylindrical portion 24, and A horizontal cut 24b is provided from the vertical cut 33 in a direction perpendicular to the press-fitting direction of the central conductor 43 of the receptacle 41.

FIG. 5 is a perspective view from another angle of FIG. 3, and FIG. 6 is a partially enlarged view thereof. As shown in FIG. 5, the line connecting the longitudinal notch 33 and the axis Q of the cylindrical portion 24 is defined as the reference line G, and the angle to the end of the lateral notch 24b is defined as the incision angle Θ. In other words, the horizontal cuts 24b are provided on the lower side of the cover portion 27 symmetrically with respect to the insertion portion of the coaxial cable 26. Two arm portions 24c are formed on the lower side portion of the cylindrical portion 24 by the transverse notches 24b. Two vertical slits 31 are formed at a position approximately 120 ° apart from the position where the cutting angle Θ is 0 °.

[0027] Here, when the cutting angle Θ is small, the rigidity of the spring that opens the arm portion 24c in the radial direction increases, and a large force (insertion force) is required for insertion into the receptacle 41. On the contrary, if the cutting angle Θ is large, a small force is required when inserting into the receptacle 41.

[0028] As shown in FIG. 6, when the external force F was applied to the tip of the arm portion 24c and the stress state when the arm portion 24c was displaced by 0.1 mm was calculated using the finite element method, the cutting angle was calculated. Θ is 0 It was found that the high stress portion of the arm portion 24c decreases as the angle increases to °, 60 °, and 90 °. In other words, for the same displacement, increasing the cutting angle Θ causes plastic deformation of the arm portion 24c. The lower limit of the cut angle Θ is determined by the elastic limit of the material of the housing 21.

[0029] If the cutting angle Θ is too large, the spring rigidity of the arm portion 24c is weakened, so that necessary contact force and insertion / extraction force cannot be obtained. Therefore, the upper limit of the cutting angle Θ is determined by the minimum required input. Figure 7 shows the simulation data of the heel input when the cutting angle Θ is increased to 0 °, 60 °, and 90 °. It can be seen that the insertion force decreases as the cutting angle Θ increases.

[0030] The upper limit of the cut angle Θ was less than 90 °. The reason is as follows. If the cut angle Θ is set to 90 ° or more, if the vicinity of the end portion of the horizontal cut 24b is plastically deformed, the cross-sectional shape of the cylindrical portion 24 is not circular. For this reason, when the winding angle with respect to the cylindrical outer conductor 42 of the receptacle 41 is less than 180 ° and an external force is applied in the axial direction of the coaxial cable 26, the hook force of the arm portion 24c is eliminated, and the coaxial connector This is because rattling of 1 and the receptacle 41 occurs.

[0031] Thus, in this example, the necessary insertion force, the elastic limit value of the material, the manufacturing accuracy of the cutting angle Θ, and the like were examined, and the optimum cutting angle Θ was about 76 °. However, in this embodiment, as shown in FIG. 5, the starting point of the horizontal cut 24b is from the position at the cut angle θ θλ. This value is unique to the present embodiment, and varies depending on the design.

In addition, as shown in FIG. 1, the pushing 22 has a tapered shape in which the outer diameter on the front end side (lower side) is smaller than the outer diameter on the upper side in the insertion direction of the housing 21 into the cylindrical portion 24. ing. On the upper part of the bushing 22, two projecting pieces 22 a projecting in the radial direction are provided facing each other. These two projecting pieces 22a are fitted into a cutout portion 24a formed on the upper opening side of the cylindrical portion 24. Thereby, the pushing 22 is positioned with respect to the housing 21.

[0033] Further, the pushing 22 is a socket 2 penetrating in the direction of the central axis of the pushing 22 and a rectangular fitting recess 32 into which a support portion 3a of a spring contact portion 3 of the socket 2 described later is fitted. And a spring contact portion accommodating hole 35 for accommodating the spring contact portion 3. In the spring contact portion receiving hole 35, the socket displaced radially outward by the press-fitting of the central conductor 43 of the receptacle 41 is inserted. There is enough space to accept the spring contact 3 of

The socket 2 has a spring contact portion 3 and a connection portion 9 connected to the central conductor 26c of the coaxial cable 26. The spring contact portion 3 is obtained by rounding a leaf spring (phosphor bronze) having a constant width of 0.1 mm and bending it so as to have a substantially C-shaped cross section. When the center conductor 43 of the receptacle 41 is press-fitted, the spring contact portion 3 is displaced radially outward and press-contacted with the outer peripheral surface of the center conductor 43 at a predetermined location. The inner diameter of the spring contact portion 3 is set to be smaller than the outer diameter of the center conductor 43 within a range not exceeding the elastic limit. Further, the lower side 3b of the spring contact portion 3 is chamfered so that the central conductor 43 can be easily inserted.

[0035] Further, the spring contact portion 3 has a support portion 3a at an upper portion thereof. The support portion 3a has a size substantially equal to the size of the fitting recess 32 of the bushing 22 and is pulled out integrally from the spring contact portion 3. A connecting portion 9 for electrically connecting the central conductor 26c of the coaxial cable 26 is drawn out from the support portion 3a. The connecting portion 9 is bent in a direction perpendicular to the central axis direction of the spring contact portion 3.

As shown in FIG. 8, in the socket 2, the support portion 3a of the spring contact portion 3 is fitted into the fitting recess portion 32 of the pushing 22, and the spring contact portion 3 is placed in the spring contact portion receiving hole 35. Be contained. Next, the pushing 22 is accommodated in the cylindrical part 24 of the nosing 21. On the connection portion 9 of the socket 2, the tip end portion of the center conductor 26c of the coaxial cable 26 that is covered with the terminal is disposed, and the center conductor 26c and the connection portion 9 are soldered. As a result, the socket 2 is electrically connected to the central conductor 26c of the coaxial cable 26.

Then, the insulating sheet 20 (thickness: 0.1 to 0.15 mm) that has been cut in a fixed shape is disposed in a recess 22b provided on the upper surface of the pushing 22. In this state, the lid portion 25 of the housing 21 is bent and placed on the upper surface of the pushing 22.

As a result, as shown in FIG. 9, insulation between the connection portion where the socket 2 and the central conductor 26 c of the coaxial cable 26 are connected and the lid portion 25 of the housing 21 is insulated by the insulating sheet 20. Since the insulating sheet 20 can be thin, the coaxial connector 1 can be reduced in height. When assembling, an adhesive insulating sheet 20 may be attached in advance to the back surface of the lid portion 25 of the housing 21, and may be displayed (indicated by a dotted line in FIG. )

Next, the force crimping portion 28 of the housing 21 is crimped onto the pair of cover portions 27 so that these Hold the coaxial cable 26 from above the cover 27. Further, the claw 28 a is crimped onto the outer skin 26 b of the coaxial cable 26.

[0040] The coaxial connector 1 thus obtained can be adjusted in contact force and insertion / extraction force by the lateral cut 24b even when it becomes difficult to secure the vertical slit 31 in the cylindrical portion 24 due to the low profile. . Accordingly, it is possible to prevent plastic deformation due to the displacement during insertion into the receptacle 41, and a stable fitting can be obtained even during repeated insertion and extraction.

When coupled to the receptacle 41, the cylindrical central conductor 43 of the receptacle 41 is press-fitted into the spring contact portion 3 of the socket 2. The tip of the central conductor 43 is processed so as to be an R surface or a C surface. The spring contact portion 3 is displaced radially outward by the press-fitting of the central conductor 43 of the receptacle 41, and is pressed against the outer peripheral surface of the central conductor 43 by the spring force.

A contact portion between the spring contact portion 3 of the socket 2 of the coaxial connector 1 of the present embodiment and the center conductor 43 of the receptacle 41 extends in the outer peripheral direction of the center conductor 43. Therefore, the height of the connecting portion between the socket 2 and the central conductor 43 of the receptacle 41 can be reduced.

[0043] Even if the height of the coaxial connector 1 is reduced, the spring limit of the spring contact portion 3 of the socket 2 is always constant regardless of the press-fitting stroke in which the central conductor 43 of the receptacle 41 is press-fitted. Therefore, the spring contact portion 3 of the socket 2 can stably contact the center conductor 43, and the mechanical and electrical reliability and stability of the coupling state of the coaxial connector 1 and the receptacle 41 can be sufficiently secured. it can. As a result, a coaxial connector that can be coupled to the receptacle in a mechanically and electrically stable state and that is short is obtained.

In the present embodiment, the upper portion of the cylindrical portion 24 of the housing 21 is connected over the entire circumference (or fixed so as not to spread). In the lower part of the cylindrical part 24, a gap (so-called vertical cut) 33 formed by facing the ends C and D of the two arm parts 24 c extends from the lower end of the cylindrical part 24, The vertical cut 33 has a structure in which the horizontal cut 24b is substantially connected. Therefore, instead of the vertical cut 33, a vertical slit 31 may be formed, and the horizontal cut 24b may be substantially connected to the vertical slit 31.

Further, in this embodiment, a conventional vertical slit is also formed in the cylindrical portion of the housing in addition to the horizontal cut of the present invention, but the vertical slit is not necessarily required. . Here, the configuration and shape of the spring contact portion 3 of the socket 2 will be described. FIG. 10 shows a state before the socket 2 and the center conductor 43 of the receptacle 41 are fitted together, and FIG. 11 shows a state where the socket 2 is fitted to the center conductor 43.

More specifically, FIG. 12 (A) is a diagram showing the shape (optimum shape) of the spring contact portion 3 before mating with the central conductor 43 of the receptacle 41, and FIG. FIG. 5 is a view showing the shape of the spring contact portion 3 after being joined.

[0048] As shown in FIG. 12 (A), before fitting, the spring contact portion 3 is set to a dimension so as to be inscribed with a circle K having a virtual diameter φ of 0.42 mm. The spring contact part 3 has two curved parts Rl and R2.

[0049] Then, as shown in Fig. 12 (B), when the center conductor 43 of the receptacle 41 is press-fitted (after fitting), the spring contact portion 3 is within the range below the elastic limit and radially outward. To the outer peripheral surface of the center conductor 43 with an outer diameter of 4545 mm, and press contact with the three contacts Ρ1 to Ρ3. The first contact Pl, the second contact Ρ2 and the third contact Ρ3 are arranged at equal intervals of 120 °, and the resistance (repulsive force) of the spring contact part 3 at each contact Ρ1 to Ρ3 is in the center direction of the center conductor 43. It acts as an urging force and uses this as a pressure contact force.

[0050] Thereby, each pressure contact force becomes substantially equal, and a stable contact state can be maintained. Such an effect is attributed to the fact that the spring contact portion 3 has a curved portion of η−1 so that it has η contacts on the outer peripheral surface of the center conductor 43 in the circumferential direction. That is, the three contacts Ρ1 to Ρ3 between the spring contact portion 3 of the socket 2 and the central conductor 43 of the receptacle 41 can always be arranged at a fixed position, and the distance between the fulcrum and the force point does not change, so the contact force of the contact Can be stabilized.

[0051] Of the contacts Ρ1 to Ρ3, the first contact P1 serves as a fixed point (fulcrum) of the spring contact portion 3. This is because the socket 2 is positioned by fitting the support portion 3a into the fitting recess 32 of the bushing 22, and the pushing 22 is positioned by fitting the protrusion 22a into the notch 24a of the housing 21. Power. On the other hand, the second contact P2 and the third contact P3 are freely displaced.

[0052] In this embodiment, the spring contact portion 3 of the socket 2 is substantially C-shaped, and as shown in FIG. 12 (A), one vertex of the equilateral triangle is cut out, and the remaining vertex Is formed to be a curved surface, and between the apexes is formed in a substantially straight line shape.

[0053] Here, the spring contact portion 3 of the socket 2 is provided before the center conductor 43 of the receptacle 41 is press-fitted. In this state, the distance L1 to the first contact PI where the central force of the center conductor 43 is also a fulcrum, the distance L2 to the center force second contact P2 of the center conductor 43, and the center force of the center conductor 43 third contact P3 The relational force with distance L3 is L1>L2> L3 (see Fig. 13 (A)), and when the radius of center conductor 43 is R, LI≤R is set!

[0054] If there are n contacts, the contact farthest from the first contact P1, which is the fulcrum, is the nth contact Pn, and the center force of the center conductor 43 is the distance Ln to the nth contact Pn. Then set L1> L2 "-> Ln and LI≤R.

[0055] As a result, when the spring contact portion 3 of the socket 2 and the center conductor 43 of the receptacle 41 start to be fitted, the R contact or the C surface is provided at the tip of the center conductor 43. Spring contact part 3 is displaced in the order of P3 and second contact P2. Therefore, the spring contact portion 3 and the center conductor 43 can be reliably contacted at all the contacts P1 to P3, and the spring contact portion 3 that effectively uses the spring force can be realized.

[0056] When the first contact P1 is used as a fulcrum (fixed point), the second contact P2 is a power point. When the second contact point P2 is used as a fulcrum, the third contact point P3 becomes the power point. Since the virtual diameter of the spring contact portion 3 is always set to be smaller than the diameter of the central conductor 43 of the receptacle 41, the second contact P2 serves both as a fulcrum and as a force point.

[0057] Therefore, if the conditions of L1> L2> L3 and L1≤R are maintained, the virtual diameter of the spring contact portion 3 is reduced.

曲. Even when the diameter is smaller than 42 mm, the curved parts Rl and R2 are uniformly plastically deformed, so once the spring contact part 3 has been fitted, the virtual diameter φ θ. The contacts P1 to P3 can be maintained in an optimal state, and none of the contacts P1 to P3 will be open.

[0058] It should be noted that the relationship between the distances L1 to L3 is L1 <L2 <L3 as shown in FIG. 13 (B), or the relationship between the distances L1 to L3 is L1> L2 as shown in FIG. 13 (C). When L2 <L3, the second contact P2 and the third contact P3 are not formed, and the contact state between the spring contact portion 3 and the center conductor 43 becomes unstable.

[0059] Even if the height of the coaxial connector 1 is reduced, the spring limit of the spring contact portion 3 of the socket 2 is always constant regardless of the press-fitting stroke in which the central conductor 43 of the receptacle 41 is press-fitted. Therefore, the spring contact portion 3 of the socket 2 is in stable contact with the center conductor 43 and is connected to the coaxial connector 1 and the lever. The mechanical and electrical reliability and stability of the coupling state with the receptacle 41 can be sufficiently ensured. As a result, a coaxial connector that can be coupled to the receptacle in a mechanically and electrically stable state and that is short is obtained.

In this embodiment, the force described in the example in which the number of the contacts P between the spring contact portion 3 of the socket 2 and the central conductor 43 of the receptacle 41 is three is not necessarily limited to three. When the number of contacts between the spring contact part 3 of the socket 2 and the central conductor 43 of the receptacle 41 is n (n≥3), if the contacts P are arranged at equal intervals of 36 0 ° Zn, the anti-contact of the contact P is centered. It can be directed to the center of the conductor 43, and the same effect as in the present embodiment can be obtained.

[0061] For example, as shown in FIG. 14, when the contact force between the spring contact portion 3 of the socket 2 and the central conductor 43 of the receptacle 41 is several, if the contacts P1 to P4 are arranged at equal intervals of 90 °, The resistance of the contacts P1 to P4 can be directed to the center of the central conductor 43. Fig. 14 (A) shows the shape (optimum shape) of the spring contact portion 3 before mating with the central conductor 43 of the receptacle 41, and Fig. 14 (B) shows the spring contact portion 3 after mating. FIG.

Further, as shown in FIG. 15, when the number of contacts between the spring contact portion 3 of the socket 2 and the central conductor 43 of the receptacle 41 is 5, if the contacts P1 to P5 are arranged at equal intervals of 72 °, The resistance of the contacts P1 to P5 can be directed to the center of the center conductor 43. Fig. 15 (A) shows the shape (optimum shape) of the spring contact portion 3 before mating with the center conductor 43 of the receptacle 41, and Fig. 15 (B) shows the spring contact portion 3 after mating. FIG.

[0063] Further, if the diameter of the cylindrical central conductor 43 of the receptacle 41 is always assumed to be the same dimension, the outermost diameter when the spring contact portion 3 and the central conductor 43 are fitted is increased as the number of contacts is increased. Dimensions are reduced. Therefore, the diameter of the outer conductor 42 of the receptacle 41 can be reduced, and the surface mount coaxial connector 1 having a small mounting area can be realized.

Next, a mobile phone will be described as an example of the communication device according to the present invention. FIG. 16 shows a high-frequency circuit 120 for a mobile phone. The high-frequency circuit 120 includes an antenna element 122, a duplexer 123, a connector 125, a transmission-side isolator 131, a transmission-side amplifier 132, and a transmission-side interstage circuit. The band-pass filter 133, the transmission-side mixer 134, the reception-side amplifier 135, the reception-side interstage band-pass filter 136, the reception-side mixer 137, the voltage-controlled oscillator (VCO) 138, and the local band-pass filter 139. Here, the force S can be used by using the coaxial connector 1 and the receptacle 41 as the connector 125. The central conductor 26 c of the coaxial cable 26 is connected to the antenna element 122, and the central conductor 43 of the receptacle 41 is connected to the duplexer 123. This connection relationship may be reversed. The coaxial connector 1 and the receptacle 41 can also be used as a connector for connecting a plurality of substrates built in the mobile phone.

It should be noted that the coaxial connector and the communication device according to the present invention can be variously modified within the scope of the gist that is not limited to the above-described embodiments.

Industrial applicability

[0067] As described above, the present invention is useful for a coaxial connector used for a component of a portable communication device and the like, and particularly, can be coupled to a receptacle in a mechanically and electrically stable state, It is excellent in that a low profile can be achieved.

Claims

The scope of the claims

[1] a coaxial cable having a center conductor and an outer conductor;

The center conductor of the receptacle is press-fitted and expands outward in the radial direction, and a spring contact portion that presses against the outer peripheral surface of the center conductor, and the force of the spring contact portion is pulled out integrally and the center direction of the spring contact portion A socket having a connection portion that is bent in a direction substantially orthogonal to the coaxial cable and connected to the central conductor of the coaxial cable;

A bushing for housing the socket, and a bushing mounted in a cylindrical portion of the housing;

Coaxial connector characterized by

[2] The coaxial cable insertion portion is provided at an upper portion of the tubular portion, the vertical cut is provided below the insertion portion, and the horizontal cut is symmetrical with respect to the vertical cut. The coaxial connector according to claim 1, wherein the coaxial connector is provided.

[3] The lower end force of the cylindrical portion is provided with a vertical slit in a direction substantially parallel to the press-fitting direction of the central conductor of the receptacle at the lower portion of the cylindrical portion. Or the coaxial connector according to item 2.

[4] The spring contact portion of the socket has a substantially C-shaped cross section, and has n-1 contacts so that it has n contacts in the circumferential direction on the outer peripheral surface of the core conductor of the receptacle. The coaxial connector according to any one of claims 1 to 3, wherein the coaxial connector has a curved portion.

[5] The spring contact portion of the socket and the central conductor force of the receptacle have a first contact, a second contact, and a third contact arranged at an interval of about 120 °, and the spring contact portion has two bends. 5. The coaxial connector according to claim 4, further comprising a portion.

[6] The spring contact portion of the socket includes a distance L1 to the first contact that is a central force fulcrum of the central conductor of the receptacle and a center of the central conductor of the receptacle in a state before the central conductor of the receptacle is press-fitted. L2 from the contact point to the second contact and the central force of the center conductor of the receptacle Relationship force with the distance L3 to the third contact L1> L2> L3, and L1 when the radius of the center conductor of the receptacle is R The coaxial connector according to claim 5, wherein ≤R.

[7] An insulating sheet having a thickness of 0.15 mm or less is disposed between a connection portion to which the socket and a central conductor of the coaxial cable are connected and a lid portion of the housing. The coaxial connector according to any one of the first, second and sixth terms.

[8] A communication device comprising the coaxial connector according to any one of claims 1 to 7.