JP2003297491A - Coaxial connector and tool for extraction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector capable of strengthening gland performance against high frequency, preventing movement of a contact, improving mounting strength to a board, preventing peeling of a signal terminal from a pad, preventing peeling of the pad from the board and stabilizing a contact position with a contact of a mating side connector and to provide a tool for extraction never deforming the signal terminal, etc., at the time of extraction. <P>SOLUTION: This coaxial connector 1 is constituted so that at least more than three pieces of grounding terminals 20, 21 formed on a shell 11 are arranged along a circle with a central part of the shell 11 as its center or in the neighborhood of the circle and the grounding terminal 21 is formed to overhang outside of the signal terminal 15. Additionally, a projected part 14 is formed on a bottom surface of the contact 13, and a hooking part 20a on which the tool for extraction is hooked is provided on the shell 11. The tool is furnished with a holder part 43 and a forked pressurizing part 41, and a protruded part 47 is formed in the middle of the holder part 43. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial connector and a removal jig, and more particularly to a coaxial connector arranged on a substrate for use and a removal jig for removing the same.

[0002]

2. Description of the Related Art In recent years, electronic devices such as mobile phones and notebook personal computers have become smaller and smaller.
It is becoming extremely densely mounted. For example, a conventional surface mounting technology (Surface Mounting Technology: abbreviated as “SMT”) coaxial connector 100 shown in FIGS. 13A and 13B is a female type coaxial connector, and a mating counterpart (not shown) to be fitted therein is provided. The contact 103 of the male connector is electrically connected to the contact 103, an insulator 107 holding the contact 103, and a metal shell 101 containing the insulator 107. . The shell 101 has a fitting portion 101a formed into a substantially cylindrical shape that fits with a mating male connector.
At the center of the fitting portion 101a, contacts 103, 103, each having a tip that is bifurcated into a substantially U shape, are provided upright. The end of the contact 103 on the substrate side serves as a signal terminal 105 through which an electric signal flows, and the signal terminal 105 is connected to a conductive pad provided on the substrate.

If the flux or solder used when mounting the coaxial connector 100 on the substrate adheres to the contact 103, the electrical connection characteristics will be deteriorated.
The bottom portion 103a of 03 is slightly bent to provide a gap 120 so that flux and solder do not rise along the contact 103. Here, the flux chemically removes the oxide film on the surface of the metal to be soldered so that the soldering can be performed well. The gap 120 has a function of forming a fillet in a portion to be soldered when the coaxial connector 100 is mounted on the substrate. In addition, the signal terminal 1 of the contact 103
The end portion 106 on the side opposite to 05 is inserted into a hole portion 109 formed in the bottom portion of the insulator 107 so that the contact 103 is fixed to the insulator 107.
Then, on the left and right of the shell 101, a pair of ground terminals 110, 1 connected to the ground pads on the substrate and grounded.
10 are provided.

[0004]

In the above-mentioned conventional surface mount type coaxial connector 100, the ground terminals 110, 110 connected to the ground pad on the substrate are provided at one place on each side (two places in total). ), There was a problem that the ground performance for high frequencies is poor. In addition, the bottom 103a side of the contact 103 is formed with a gap 120 in consideration of the rise prevention of flux and solder, the formation of fillet on the adhesive portion, and the imparting of spring property, and also stabilizes the contact 103. Although the bending position is long and the press-fitting depth is deep in order to fix it, when the mating male connector is fitted, the bottom portion 103a of the contact 103 is downward (arrow in the figure) along with the fitting operation. Direction), and in some cases it may shift to the left or right. If the bottom portion 103a of the contact 103 moves, not only the contact 103 itself is deformed but also the signal terminal 105 may be separated from the pad or the pad may be separated from the substrate. Further, there is a problem that the contact position with the contact of the mating connector is not stable. On the other hand, if the protruding length of the end portion 106 becomes long, the electric transmission characteristic deteriorates. Therefore, the end portion 106 needs to be formed as short and small as possible.

Further, as shown in FIG. 13B, in the conventional coaxial connector 100, the shell 10
Since there is a portion where a part of 1 does not contact the insulator, when mating the mating male connector, a load is applied to the mating connector and the shell 101 is distorted was there.

Further, when a force is applied to the coaxial connector 100 by pulling the board or hitting something with the connectors fitted to each other, a load is directly applied to the signal terminal 105 in some cases. Signal terminal 10
There is a risk that the connection surface will be destroyed, such as when 5 is separated from the pad or the pad is peeled from the substrate. Further, the coaxial connector itself may be separated and separated from the substrate. This tendency is particularly remarkable in the case of FPC. Further, when the connectors are in a fitted state, even if an attempt is made to remove them using a jig or the like, the conventional coaxial connector 100 does not have a portion for catching the jig, and if the two are forcibly removed, the operator's hand will be unable to do so. There is a problem that the signal terminal 105 may be deformed due to the jig or the jig coming into direct contact with the conductive portion or the like on the substrate.

The present invention has been made in view of the above problems, and aims to enhance the ground performance for high frequencies, and
An object of the present invention is to provide a coaxial connector that prevents contact movement when the mating connector is inserted. Also,
SUMMARY OF THE INVENTION It is an object of the present invention to provide a coaxial connector in which a coaxial connector mounted on a board does not easily peel off from the board and the mounting strength is enhanced. Further, it is an object of the present invention to provide a coaxial connector capable of preventing the signal terminal from peeling off when the connector is inserted and removed and stabilizing the contact position with the contact of the mating connector. Further, the present invention provides a coaxial connector in which a signal terminal is not deformed by a worker's hand or a jig even if the coaxial connector in the fitted state is pulled out by the jig, and an extracting jig therefor. With the goal.

[0008]

In order to solve the above-mentioned problems, the present invention according to claim 1 is characterized in that a signal terminal formed at one end thereof is connected to a pad which is a conductive portion provided on a substrate. A coaxial structure that includes a contact that is in contact with the contact of the mating connector and is electrically connected to the mating connector, an insulator that holds the contact, and a metal shell that houses the insulator and has a ground terminal. The connector is characterized in that at least three or more ground terminals, which are grounded to the ground pad arranged on the substrate, are arranged in the shell along or near a circle centered on the center thereof.

In order to solve the above problems, the present invention according to claim 2 provides the coaxial connector according to claim 1, wherein:
The ground terminal is formed so as to project to the outside of the signal terminal.

In order to solve the above-mentioned problems, the present invention according to claim 3 is characterized in that a signal terminal formed at one end thereof is connected to a pad which is a conductive portion provided on a substrate and a contact of a mating connector is provided. In a coaxial connector configured to include a contact that comes into contact with and is electrically connected, an insulator that holds the contact, and a metal shell that houses the insulator and has a ground terminal, the bottom of the shell It is characterized in that almost the entire circumference of the end portion serves as a ground terminal, and the ground terminal is mounted on the board and grounded by joining the ground terminal to a ground pad provided on the board.

In order to solve the above problems, the present invention according to claim 4 provides the coaxial connector according to any one of claims 1 to 3, wherein the coaxial connector is surface-mounted on a substrate. Characterize.

In order to solve the above-mentioned problems, the present invention according to claim 5 provides the coaxial connector according to any one of claims 1 to 4, wherein the coaxial connector is in a fitting state with a mating connector. It is characterized in that the shell is provided with a hooking portion for hooking the removal jig when the removal jig is used.

In order to solve the above-mentioned problems, the present invention according to claim 6 provides the coaxial connector according to any one of claims 1 to 5, wherein the fitting portion formed in a substantially cylindrical shape of the shell is provided. The insulator is housed in the shell such that the lower side is in contact with the insulator.

In order to solve the above-mentioned problems, the present invention according to claim 7 provides the coaxial connector according to any one of claims 1 to 6, wherein a protrusion is provided on the bottom surface of the contact so as to come into contact with the substrate. Thus, the contact is configured to be prevented from moving when the mating connector is inserted or removed, thereby stabilizing the contact position between the contact and the contact of the mating connector.

To solve the above problems, the present invention according to claim 8 provides the coaxial connector according to any one of claims 1 to 6, wherein a fixing member is interposed between the bottom surface of the contact and the substrate. By so doing, the contact is prevented from moving due to the insertion and removal of the mating connector, thereby stabilizing the contact position between the contact and the contact of the mating connector.

In order to solve the above problems, the present invention according to claim 9 provides the coaxial connector according to any one of claims 1 to 8 in which the end side of the contact opposite to the signal terminal side has a slight height. The contact of the insulator is bent, and the end of the bent contact is press-fitted into the recess formed on the inner side surface of the space where the contact of the insulator is disposed, and the contact is engaged with the locking portion that is the upper surface of the recess. It is characterized in that the contact is held by the insulator by being stopped.

In order to solve the above-mentioned problems, the present invention according to claim 10 provides the coaxial connector according to claim 9, wherein the concave portion is narrow on the opening side, which is the inner side surface of the insulator, and wide on the back side. It is characterized by being formed.

In order to solve the above-mentioned problems, the present invention according to claim 11 is a removal jig for removing the coaxial connector according to any one of claims 5 to 10 which is in a mating state with a mating connector. A handle part, and a bifurcated pressing part that abuts a hooking part formed on the shell of the coaxial connector at one end of the handle part. By forming the portion, the convex portion is positioned on the substrate in a state where the pressing portion is brought into contact with the latching portion, and with the fulcrum as a fulcrum, force is applied to the latching portion to remove it. Provide a removal jig.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a coaxial connector according to the present invention will be described in detail with reference to the drawings. Here, FIG. 1A is a plan view of the first embodiment of the coaxial connector according to the present invention, FIG. 1B is a side view seen from the direction of arrow A in FIG. is there. In addition, FIG.
1A is a cross-sectional view of the coaxial connector shown in FIG. 1A, and FIG. 1B is a side cross-sectional view in a state of being fitted with a mating connector.

The illustrated coaxial connector 1 is a surface mount type, that is, an SMT type female coaxial connector, and as shown in FIG. 2B, an FPC (Flexible Printed Circu).
it) It is mounted on the surface of the substrate 3. The substrate 3 may be either a PCB (Printed Circuit Board) that is a rigid substrate or the above-mentioned FPC that is flexible. Also, the mating male connector 50 shown in the figure is mounted on the PCB 60, but of course it may be an FPC. The coaxial connector 1 includes a contact 13 that contacts and electrically connects with the contact 53 of the male connector 50 on the mating side, an insulator 17 made of synthetic resin that holds the contact 13, and a metal that further accommodates the insulator 17. And a shell 11 made of steel. The shell 11 has a fitting portion 11a formed in a substantially cylindrical shape that fits with the mating male connector 50, and the fitting portion 11a.
A contact 13 having a bifurcated distal end formed in a substantially U-shape is erected at a substantially central position. Contact 1
An end portion of the substrate 3 on the substrate 3 side serves as a signal terminal 15 through which an electric signal flows, and is connected to a pad on the substrate 3 which is a conductive portion. The shell 11 is a fitting portion 1 formed in a substantially cylindrical shape.
The insulator 17 is housed so that the lower side of the la 1 contacts the insulator 17. As a result, when the mating male connector 50 is fitted, the fitting portion 11
Since the fitting portion 11a is supported by the insulator 17 even when a load is applied to a, the shell 11 is not distorted. Further, since the fitting portion 11a is in contact with and supported by the insulator 17, the fitting portion 11a and the insulator 17 can be provided with a positioning mechanism for both.

On the side of the bottom 13a of the contact 13, a gap 12 is provided by slightly bending the bottom 13a of the contact 13 so that flux and solder do not reach the contact 13 and rise. The gap 12 has a function of forming a fillet in a portion to be soldered when the coaxial connector 1 is mounted on a board and imparting a spring property to the contact 13 so as to make a good contact with a contact of a mating connector. Granted.
The end 16 of the contact 13 on the side opposite to the signal terminal 15 is bent with a slight height, and the end 16 is located below the space of the insulator 17 in which the contact 13 is arranged. The contact 13 is fixed to the insulator 17 by abutting and engaging with the engaging portion 19 which is the upper surface of the concave portion 18 formed in a concave shape on the inner side surface. Then, as shown in FIGS. 8A and 8B, the recess 18 is formed such that the opening side, which is the inner side surface side of the insulator 17, is narrow and the back side is wide. As a result, the end portion 16 of the contact 13 is
Since the end portion 16 is firmly fixed when is pressed into the concave portion 18, the contact 13 is prevented from shifting in the left-right direction even when the contact portion 13 is fitted to the mating male connector 50. Further, since the end portion 16 is bent with a slight height and is positioned near the inner side surface of the insulator 17, the stub is smaller than that of the conventional coaxial connector, and therefore the electrical transmission characteristic is improved. Is improved.

On the left and right of the shell 11, first ground terminals 20 are connected to ground pads on the substrate 3 and grounded,
20 and a second ground terminal 21 are provided. The first ground terminal 20 is provided at a position facing the shell 11, and is bent so that the tip of the shell 11 projects upward from the lower end of the cylindrical shell 11 and is in contact with the ground pad on the substrate 3 while the tip thereof faces upward. Is formed. First ground terminal 2
0 is grounded at the portion that contacts the ground pad. Then, the upper surface of the first ground terminal 20 is removed from the mating male connector 50 in the mating state with jigs 40A, 40B, 40C, 40D, 40 which will be described later.
The E pressing portions 41, 41 are hooking portions 20a.

The shell 11 is further provided with a second ground terminal 21 along a circle centered on the center of the shell 11. In the present embodiment, four second ground terminals 21 are arranged about every 90 °. The number of the second ground terminals 21 to be arranged is not particularly limited, but the first ground terminal 20 including the hooking portion 20a that hooks the pressing portions 41, 41 of the jig 40A at the time of removal. Since the second ground terminal 21 is provided at two locations, at least one second ground terminal 21 is provided, for example, as shown in this embodiment,
It is preferable to provide about four places at substantially equal intervals. Of course, the second ground terminal 21 may be further provided, and in short, the second ground terminal 21 is configured to be bonded to the ground pad with as large an area as possible. Of course, the ground pad also needs to be arranged in a large area on the substrate 3 so as to cover the first ground terminal 20 and the second ground terminal 21 having such a large area. In this way, the coaxial connector 1 is mounted on the substrate 3 while maintaining a substantially equal distance to the shell 11, so that the load applied to the coaxial connector 1 is applied to the specific first or second ground terminal 20, 21. Stable mounting is possible without localization. In addition, the second ground terminal 21
Since the tip end side is shaped so as to come into wide contact with the ground pad on the substrate 3, the ground performance with respect to high frequencies is improved as compared with the conventional coaxial connector. With this configuration, it is possible to effectively prevent the peeling of the ground terminals 20, 21 from the ground pad and the peeling of the ground pad from the substrate 3. The second ground terminal 21 does not necessarily have to be provided along a circle centered on the center of the shell 11 but may be arranged in the vicinity thereof.
Since the ground pad arranged on the substrate 3 is a portion for grounding the first or second ground terminal 20, 21, the same as the arrangement, along or around the circle centered on the center of the shell 11. It is located in.

The tip of the second ground terminal 21 is connected to the signal terminal 1
It is formed so as to project to the outer side than 5. That is, the signal terminal 15 is formed so as to be located inside the broken line connecting the tip ends of the second ground terminals 21 shown in FIG. This allows the coaxial connector 1
Even if a force is applied to the coaxial connector 1 by pulling the substrate 3 or hitting something in a state where the male connectors 50 on the other side and the male connectors 50 on the other side are fitted to each other, the load is applied to the second ground terminal 21. Since it is added, it is prevented from directly adding to the signal terminal 15. Therefore, the signal terminal 15 is prevented from being separated from the pad or the pad being separated from the substrate.

On the other hand, when the coaxial connector 1 is mounted on the substrate 3, bumps can be used instead of SMT. That is, the coaxial connector 1 according to the second embodiment shown in FIGS. 3A and 3B is mounted on the substrate 3 by bumps. Here, FIG. 3A is a side view of the coaxial connector 1 using bumps, and FIG. 3B is a bottom view thereof. In the coaxial connector 1 according to the second embodiment shown in FIG. 3, solder bumps 25 formed in a substantially spherical shape are arranged at seven locations along the circular bottom surface of the shell 11, whereby the shell 11 is grounded and the substrate 3 Implemented on. Similarly, the signal terminal 15 is also mounted on the ground pad on the substrate 3 by the solder bump 25. The bumps are made of metal such as copper or gold in addition to the solder bumps described above, and it is of course possible to use them. Note that the other configurations are similar to those of the first embodiment, and therefore the description thereof is omitted.

Further, FIGS. 4A and 4B show a dip type coaxial connector 1 in which the ground terminals 27, 27 are inserted into through holes (not shown) formed in the substrate 3 and grounded. Here, FIG. 4A is a side view of the dip type coaxial connector 1, and FIG. 4B is a bottom view thereof. The coaxial connector 1 in the third embodiment shown in FIG. 4 has a ground terminal 2 along the circular bottom surface of the shell 11.
7 and 27 are provided at seven positions so as to project downward, and are mounted on the board 3. Also, similarly,
The signal terminal 15 is also formed so as to project to the lower side of the shell 11, and is inserted into a through hole (not shown) formed in the substrate 3 to be mounted. The rest of the configuration is similar to that of the first embodiment, and the description thereof is omitted.

The above-described first embodiment (SMT type), second embodiment (bump type), and third embodiment (dip type) are not limited to those formed independently, but are combined. It is also possible. That is, FIG. 5A shows a composite type coaxial connector 1 in which a bump type and an SMT type are mixed.
FIG. The coaxial connector 1 shown in FIG.
Two first ground terminals 20 and five second ground terminals 21 arranged in one place more than those of the first embodiment.
And surface mounted on the substrate 3, and the signal terminals 15 are mounted on the substrate 3 by bumps. In this case, since the signal terminal 15 is located inside the shell 11, the coaxial connector 1 and the mating male connector 50 are connected.
Even if a load is applied in the fitted state, the load is prevented from being applied to the second ground terminal 21 and directly to the signal terminal 15.

FIG. 5B shows a composite type coaxial connector 1 in which a dip type and an SMT type are mixed.
FIG. That is, the coaxial connector 1 shown in FIG. 5B has two first ground terminals 20 and five second ground terminals 21, each of which is surface-mounted on the board 3 and the signal terminal 15 is It is formed so as to project to the lower side of the shell 11, and is mounted by being inserted into a through hole (not shown) formed in the substrate 3.

FIG. 6A shows a composite type coaxial connector 1 in which a dip type and a bump type are mixed.
FIG. That is, in the coaxial connector 1 shown in FIG. 6A, the solder bumps 25 are arranged at seven positions along the circular bottom surface of the shell 11, whereby the shell 11 is formed.
Is grounded and mounted on the board 3, and the signal terminal 1
Reference numeral 5 is formed so as to project to the lower side of the shell 11, and is inserted into a through hole (not shown) formed in the substrate 3 to be mounted.

FIG. 6B shows a composite type coaxial connector 1 in which a bump type and a dip type are mixed.
FIG. That is, the coaxial connector 1 shown in FIG. 6A is provided at seven locations along the circular bottom surface of the shell 11 so that the ground terminals 27, 27 project downward, and is mounted on the substrate 3. At the same time, the signal terminals 15 are mounted on the substrate 3 by bumps.

FIG. 6C shows a composite type coaxial connector 1 in which an SMT type and a dip type are mixed.
FIG. That is, the coaxial connector 1 shown in FIG. 6C is provided at seven locations along the circular bottom surface of the shell 11 such that the ground terminals 27, 27 project downward, and is mounted on the board 3. At the same time, the signal terminals 15 are mounted on the substrate 3 by SMT.

FIG. 6D is a bottom view of the composite type coaxial connector 1 in which the SMT type and the bump type are mixed. That is, in the coaxial connector 1 shown in FIG. 6D, the solder bumps 25 are arranged at seven positions along the circular bottom surface of the shell 11, whereby the shell 11 is grounded and mounted on the substrate 3, and The terminal 15 is mounted on the substrate 3 by SMT. The number of solder bumps 25 of the bump type and the ground terminals 27 of the dip type are not limited to 7 and, of course, more may be provided. The other configurations of the composite type coaxial connector 1 described above are similar to those of the first embodiment.

Further, as shown in FIGS. 7A and 7B, the bottom end 11a of the shell 11 can be bonded to a ground pad on the substrate 3 as a ground terminal. That is, in the coaxial connector 1 according to the present embodiment, the bottom end portion 11a of the shell 11 formed in the substantially C shape is used as the ground terminal, and
It is a junction with the substrate 3 (ground pad). Here, FIG. 7A is a bottom view of the SMT type in which the bottom end 11a of the shell 11 is used as a ground terminal, and FIG. 7B is a bottom view of the dip / SMT mixed type. In the coaxial connector 1 according to this embodiment, the bottom end 11a of the shell is joined to the ground pad over substantially the entire circumference, so that the joining strength is enhanced and the ground performance is also improved.

By the way, when the signal terminal 15 is mounted by SMT, the mating male connector 50 is attached to the coaxial connector 1.
As shown in FIG. 9A, in order to prevent the bottom 13a of the contact 13 from moving downward when inserting and fitting the protrusion, as shown in FIG. It is preferable to provide the portion 14. As a result, the contact 13 is prevented from moving when the mating male connector 50 is inserted or removed, and the contact position between the contact 13 and the mating male connector 50 is stabilized (see FIG. 2B). ).

Further, in order to prevent the contact 13 from moving, the protrusion 14 is provided as described above, and the fixing member 30 is interposed in the gap 12 between the bottom 13a of the contact 13 and the substrate 3, so that the mating male connector 50 can be prevented. It is also possible to prevent the contact from moving due to insertion and removal. That is, the coaxial connector 1 shown in FIG. 9B is configured to include an insulator 17 on the bottom surface of which the fixing member 30 is integrally molded so as to project downward. This fixing member 30 is used when mounting the coaxial connector 1 on the substrate 3 as shown in FIG.
The contact 13 is bent in the direction of the arrow shown in FIG.
It is adapted to be accommodated in the gap 12 between the bottom portion 13a of the substrate 3 and the substrate 3. This stabilizes the contact position between the contact 13 and the contact 53 of the mating male connector 50 (see FIG. 2B). By the way, this fixing member 30
Is the gap 12 between the bottom 13a of the contact 13 and the substrate 3.
If the contact 13 is housed in the housing and the contact 13 is prevented from moving, the contact 13 may be bent during mounting.
Further, the fixing member 30 may be formed as a separate member from the insulator 17, and may be sandwiched in the gap 12 during mounting.

Next, a jig used for releasing the fitted state between the coaxial connector 1 according to the present invention and the mating male connector 50 will be described. First, the jig 40A shown in FIG. 10 (a) is formed by providing bifurcated pressing portions 41, 41 on one end side of a flat plate-shaped holding portion 43.
The pressing portions 41, 41 of the jig 40A are hooked on the hooking portion 20a which is the upper surface of the first ground terminal 20 provided on the shell 11 and pulled upward (see FIG. 10 (d)). The mated state of both is released and the coaxial connector 1 is removed.

Similarly, the jig 40B shown in FIG.
Is formed by providing pressing portions 41, 41 that are bifurcated and bent in a substantially right-angled direction at an end portion of a flat plate-shaped handle portion 43. Further, the jig 40C shown in FIG. 10C has a shape that can be adopted when the width of the substrate 3 is known or predetermined, and the jig 40C is provided on the end side of the handle portion 43 of the substrate 3. Pressing portions 41, 41 are formed at the tips of the arm portions 45, 45 that are widened to the width and length. Jig 40B, Jig 40C
Similarly to the jig 40A, the pressing portions 41, 41 are hooked on the hooking portion 20a which is the upper surface of the first ground terminal 20 provided on the shell 11 and pulled up in the direction of the arrow to move the coaxial connector 1 Remove.

Further, the jig 40D shown in FIG.
The plate-like handle portion 43 is provided with bifurcated pressing portions 41, 41 on one end side, and a convex portion 47 is formed in the middle of the handle portion 43. Then, as shown in FIG. 11B, the pressing portions 41, 41 of the jig 40D are the hook portions 20 which are the upper surfaces of the first ground terminals 20 provided on the shell 11.
The convex portion 47 is positioned on the substrate 5 while being brought into contact with a,
A force is applied to the hooking portion 20a with that point as a fulcrum to release the fitted state of the both and the coaxial connector 1 is removed. This jig 40
D is effective when the mounting position of the coaxial connector 1 is far from the side surface of the substrate 3. In addition, the handle portion 43, for example,
If the bellows state can be adjusted in length and the position and height of the convex portion 47 can be changed, it can be used in various situations.

Further, the jig 40E shown in FIG.
The handle portion 43 formed in a U shape has arms 45, 45 that are widened on the end side, and the pressing portions 41, 41 are formed at the tips of the arms 45, 45. . This jig 40
For example, as shown in FIGS. 12 (b) and 12 (c), E indicates two holes 3a, 3 so as to be adjacent to the hooking portion 20a of the coaxial connector 1 in advance on the substrate 3 on which the coaxial connector 1 is mounted.
a is preliminarily provided, and the pressing portions 41, 41 of the jig 40E are inserted into the holes 3a, 3a, and the pressing portions 41, 41 are formed on the upper surface of the first ground terminal 20 provided on the shell 11. It is hooked on a hooking portion 20a. By pulling the jig 40E upward in this state, the fitting with the mating male connector 50 can be released and the coaxial connector 1 can be removed.

Although the female coaxial connector mounted on the board has been described so far, it is needless to say that the present invention is not limited to the female connector and can also be applied to the mating male connector. Absent.

[0041]

As described above, according to the coaxial connector of the present invention, at least three or more ground terminals formed on the shell are provided along or near a circle centered on the center of the shell. Since they are arranged, the ground performance for high frequencies can be enhanced, and the mounting strength can be enhanced without the coaxial connector mounted on the substrate being easily peeled off from the substrate. In addition, since the entire bottom end of the shell is mounted on the board and grounded by bonding it to the ground pad as a ground terminal, the ground performance for high frequencies can be enhanced and the board There is an effect that the mounted coaxial connector is not easily peeled off from the substrate and the mounting strength is enhanced.

Further, since the ground pads are also arranged in a large area so that the first ground terminal 20 and the second ground terminal 21 are grounded in a wide area, in addition to the separation between the ground terminal and the ground pad. Therefore, it is possible to effectively prevent the occurrence of peeling between the ground pad and the substrate. Especially when the substrate is an FPC, the effect is remarkable.

Further, according to the coaxial connector of the present invention, the bottom surface of the contact is provided with the protrusion so as to come into contact with the substrate, or the fixing member is interposed between the bottom surface of the contact and the substrate. There is an effect that the movement of the signal terminal is prevented when the connector is inserted and removed, thereby preventing the signal terminal from peeling and stabilizing the contact position with the contact of the mating connector.

Further, according to the coaxial connector of the present invention, since the ground terminal is formed so as to project to the outside of the signal terminal, the signal terminal can be directly connected even when a load is applied to the coaxial connector or the substrate. Therefore, there is an effect that the load is not transmitted to the substrate and therefore the signal terminal is not easily peeled off from the substrate.

Further, according to the coaxial connector of the present invention, when the coaxial connector that is in the mating state with the mating connector is removed by using the extraction jig, the extraction jig is locked. Since the portion is provided in the shell, there is an effect that the signal terminal is not deformed by a worker's hand or a jig.

[Brief description of drawings]

1A is a plan view of a first embodiment of a coaxial connector according to the present invention, FIG. 1B is a side view seen from the direction of arrow A in FIG. 1A, and FIG. .

2A is a cross-sectional view of the coaxial connector shown in FIG. 1A, and FIG. 2B is a side cross-sectional view of a state in which it is fitted with a mating connector.

3A is a side view of the coaxial connector 1 using bumps, and FIG. 3B is a bottom view thereof.

4A is a side view of the dip type coaxial connector 1, and FIG. 4B is a bottom view thereof.

5A is a bottom view of a composite type coaxial connector 1 in which a bump type and an SMT type are mixed, and FIG. 5B is a bottom view of a composite type coaxial connector 1 in which a dip type and an SMT type are mixed. is there.

6A is a bottom view of a composite type coaxial connector 1 in which a dip type and a bump type are mixed, and FIG. 6B is a bottom view of a composite type coaxial connector 1 in which a bump type and a dip type are mixed. (C) is a composite type coaxial connector 1 in which SMT type and dip type are mixed
2D is a bottom view of the composite type coaxial connector 1 in which the SMT type and the bump type are mixed.

FIG. 7A is an SM in which the bottom end of the shell is used as a ground terminal.
The bottom view of the T type, (b) is the bottom view of the dip / SMT mixed type.

FIG. 8A is a bottom view of an insulator showing a recess, and FIG. 8B is a partial cross-sectional view showing a state where an end of a contact is press-fitted into the recess.

FIG. 9 (a) is a protrusion 14 provided on the bottom of the contact.
3B is a side sectional view showing an insulator provided with a fixing member, and FIG. 6C is a side sectional view showing a state where the fixing member is housed in a gap.

FIG. 10A to FIG. 10C are perspective views of an extraction jig,
(D) is a side view showing a state at the time of removal.

11A is a perspective view of an extraction jig different from FIG.
(B) is a side view showing a state at the time of removal.

12A is a perspective view of an extraction jig different from FIGS. 10 and 11, FIG. 12B is a perspective view showing holes formed in a substrate, and FIG. 12C is a state at the time of extraction. It is a side view.

13A is a plan view of a conventional surface mount type coaxial connector, and FIG. 13B is a side sectional view thereof.

[Explanation of symbols]

1 coaxial connector 3 substrates 11 shell 11a fitting part 12 gaps 13 contacts 13a bottom 14 Projection 15 signal terminals 17 Insulator 18 recess 19 Locking part 20 First ground terminal 20a Hook 21 Second ground terminal 25 solder bumps 27 Ground terminal 30 fixing member 40A, 40B, 40C, 40D, 40E jig 41 Pressing part 43 Handle 45 arms 50 male connector 53 contacts 60 substrates

Continued front page    F term (reference) 5E077 BB06 BB09 BB22 BB33 CC22                       CC26 DD02 EE05 EE12 FF30                       JJ11 JJ21 JJ30

Claims (11)

[Claims] 1. A contact, which has a signal terminal formed at one end thereof connected to a pad which is a conductive portion provided on a substrate and which contacts a contact of a mating connector to be electrically connected thereto, A coaxial connector configured to include an insulator that holds the insulator, and a metal shell that accommodates the insulator and has a ground terminal, wherein the ground terminal is grounded to a ground pad disposed on the substrate. The coaxial connector, wherein at least three or more are arranged in the shell along or near a circle having the center as a center. 2. The coaxial connector according to claim 1, wherein the ground terminal is formed so as to project outside the signal terminal. 3. A contact that has a signal terminal formed at one end thereof connected to a pad, which is a conductive portion provided on a substrate, and that contacts a contact of a mating connector to be electrically connected thereto, In a coaxial connector configured to include an insulator that holds the insulator, and a metal shell that houses the insulator and has a ground terminal, substantially the entire circumference of the bottom end of the shell serves as the ground terminal. A coaxial connector which is mounted on a board and grounded by joining the ground terminal to a ground pad provided on the board. 4. The coaxial connector according to claim 1, wherein the coaxial connector is surface-mounted on a substrate. 5. The coaxial connector according to any one of claims 1 to 4, wherein when the coaxial connector that is in a mating state with a mating connector is removed using a removal jig, the removal is performed. A coaxial connector, characterized in that a hook portion for hooking a jig is provided on the shell. 6. The coaxial connector according to any one of claims 1 to 5, wherein the lower portion of a substantially cylindrical fitting portion of the shell is in contact with the insulator. Is contained in the shell. 7. The coaxial connector according to any one of claims 1 to 6, wherein a protrusion that comes into contact with a substrate is provided on a bottom surface of the contact so that the contact can move when the mating connector is inserted and removed. A coaxial connector, which is configured so as to prevent the contact, thereby stabilizing the contact position between the contact and the contact of the mating connector. 8. The coaxial connector according to claim 1, wherein a movable member is inserted between the bottom surface of the contact and the substrate to move the contact when the mating connector is inserted and removed. A coaxial connector characterized in that the contact position between the contact and the contact of the mating connector is stabilized. 9. The coaxial connector according to claim 1, wherein an end portion side of the contact opposite to the signal terminal side is bent with a slight height, An end of the contact bent into a recess formed on the inner side surface of the space where the contact is disposed is press-fitted to be locked to a locking portion which is the upper surface of the recess, whereby the contact is insulated. The coaxial connector is characterized by being held by. 10. The coaxial connector according to claim 9, wherein the recess is formed such that the opening side, which is the inner side surface side of the insulator, is narrow and the back side is wide. 11. A removal jig for removing the coaxial connector according to claim 5, which is in a mating state with a mating connector, comprising a handle and a handle. A pressing portion that is bifurcated to abut on a hooking portion formed on the shell of the coaxial connector at one end; and a hooking portion formed in the middle of the handle portion A jig for extraction, characterized in that the convex portion is positioned on the substrate in a state where the pressing portion is brought into contact with the substrate, and a force is applied to the hooking portion with the convex portion as a fulcrum to remove the convex portion.