JPH09115617A - Receptacle connector with ground wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manhours for the assembling operation and prevent misalignment of a ground contact at the time of assembly. SOLUTION: Through a hook pin 10, a conductive shell 1 in cylindrical shape is connected with a ground contact 4 installed inside of the shell 1. The hook pin has two flexible legs 15 arranged parallel at a certain spacing and a disc- shaped head 16 at which the legs are coupled together at one end. On the other end of the legs, two hooks 17 are provided which are outward protruding oppositely to each other. The legs are threaded through a hole 11 in the shell and inserted into a hole 13 in the ground contact, and the head is fitted by pressure in the hole in the shell. The two hooks are engaged by the hook receptacle surface 14 on the ground contact so that the hook pin is hindered from separation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grounded receptacle connector in which a conductive ground contact is electrically connected to a cylindrical conductive shell outside the grounded ground contact. This type of grounded receptacle connector is suitable, for example, for connecting to a power supply plug of a motor, an industrial robot, a machine tool, or the like.

[0002]

2. Description of the Related Art A conventional grounded receptacle connector is shown in FIGS. In this receptacle connector with ground, one conductive ground contact 4 and three conductive power contacts 5 are axially located inside the cylindrical conductive shell 1 via a front insulator 2 and a rear insulator 3. It is held in parallel.
Further, a screw component 6 as a conducting member for electrically connecting the ground contact 4 to the shell 1 is provided.

The screw part 6 is screwed into the screw hole 7 of the ground contact 4 through a hole formed in a part of the shell 1,
This electrically connects the ground contact 4 to the shell 1. After screwing the screw component 6 into the screw hole 7, the head 8 of the screw component 6 is bonded to the shell 1 with a connecting agent 9 in order to prevent the screw component 6 from loosening.

[0004]

However, in the grounded receptacle connector shown in FIGS. 16 and 17, in addition to screwing in the screw component 6, it is necessary to bond it with the adhesive 9, so that the number of assembling steps is increased. Is increased and there is a problem in workability.

Further, since the material used for the front insulator 2 is generally elastic, a part of the ground contact 4 is the screw part 6 depending on the amount of screwing the screw part 6 into the screw hole 7 of the ground contact 4. As a result, the axis of the ground contact 4 may be displaced, and the parallelism with the axes of the shell 1 and the power contact 5 may be impaired.

Therefore, an object of the present invention is to provide a grounded receptacle connector which can reduce the number of assembling steps.

Another object of the present invention is to provide a receptacle connector with a ground that is less likely to cause a deviation of the axis of the ground contact during assembly.

[0008]

According to the present invention, a cylindrical conductive shell, a conductive ground contact disposed inside the shell, and a conductive structure in which the ground contact is electrically connected to the shell. In a grounded receptacle connector including a member, the conductive member includes a hook pin having a plurality of flexible legs, a head portion on one end side of the leg portion, and a hook on the other end side of the leg portion, Each of the shell and the earth contact is provided with a hole extending in the radial direction so as to face each other, the leg portion is inserted through the hole of the shell into the hole of the earth contact, and the head is press-fitted into the hole of the shell. Then, the leg portion is pressed against the inner surface of the hole of the ground contact due to its elastic restoring force, and the hook is engaged with the ground contact to secure the hook pin of the hook pin. Receptacle connector with ground, characterized in that blocked the removal is obtained.

Further, according to the present invention, it includes a cylindrical conductive shell, a conductive ground contact arranged inside the shell, and a conductive member electrically connecting the ground contact to the shell. In the receptacle connector with ground, the conductive member includes two flexible leg portions that are parallel to each other and are spaced apart from each other, and a disk-shaped head portion in which the two leg portions are coupled to each other at one end side thereof. A hook pin having two hooks projecting outwardly from each other at the other ends of the two legs, respectively, the shell and the earth contact are provided with holes extending in a radial direction facing each other, The two legs are inserted into the holes of the earth contact through the holes of the shell, the head is press-fitted into the holes of the shell, and each of the two legs is elastically restored by the elastic restoring force. Together is pressed against the inner surface of the contact hole, the receptor connector with ground is obtained, characterized in that the two hooks to prevent disengagement of engaged thereby said hook pin to the ground contact.

Further, according to the present invention, it includes a tubular conductive shell, a conductive ground contact arranged inside the shell, and a conductive member electrically connecting the ground contact to the shell. In the grounded receptacle connector, the conducting member includes a press-fitting pin having a body portion at least a part of which has an outer diameter slightly larger than the hole of the earth contact and a head portion on one end side of the body portion, and the shell. Each of the earth contacts is provided with a hole extending in the radial direction so as to face each other, and the body portion is press-fitted into the hole of the earth contact through the hole of the shell to be engaged with the head portion in the hole of the shell. A receptacle connector with a ground, which is characterized by being press-fitted, is obtained. Here, more specifically, the body portion that is press-fitted into the inner surface of the hole of the ground contact has, more specifically, a body in which a projection extending in the axial direction is formed on the outer circumference, or the other end side (the ground contact It is possible to adopt a form in which a part of the press-fitting side into the hole is cut off (for example, slitting).

In these grounded receptacle connectors, the ground contact may be held by the shell via an insulator having elasticity.

Further, it is preferable that the head portion has a plurality of projections on its peripheral surface that bite into the inner surface of the hole of the shell.

[0013]

1 to 3 show the overall structure of a grounded receptacle connector according to an embodiment of the present invention. In this receptacle connector with ground, one conductive ground contact 4 and three conductive power contacts 5 are axially located inside the cylindrical conductive shell 1 via a front insulator 2 and a rear insulator 3. It is held in parallel. Further, a hook pin 10 as a conducting member for electrically connecting the ground contact 4 to the shell 1 is provided.

The shell 1 is made of aluminum alloy.
A circular hole 11 penetrating in the radial direction is formed in a part of the shell 1. The inner diameter of the hole 11 is a relatively large cylindrical shape on the outer surface side of the shell 1 and a conical shape on the inner surface side of the shell 1 that decreases as the inner surface approaches the inner surface. The inner surface of the hole 11 is formed smoothly.

The front insulator 2 is made of silicon rubber. The rear insulator 3 is made of synthetic resin. The front insulator 2 and the rear insulator 3 are fixed to the shell 1 by a protrusion 11 provided on the inner surface of the shell 1, a retainer ring 12, and the like.

Ground contact 4 and power contact 5
Each is made of copper alloy. Earth contact 4
Only part of it, specifically the hole 1 of the shell 1.
As shown in FIGS. 4 and 5, a circular hole 13 penetrating in the radial direction is formed at a position opposed to No. 1 in the radial direction. The inner diameter of this hole 13 is selected to be equal to the inner diameter of the smallest diameter portion of the hole 11 of the shell 1. The inner surface of this hole 13 is also made smooth. A flat hook receiving surface 14 is formed on the ground contact 4 around the hole 13 and on the side opposite to the side facing the hole 11 of the shell.

The hook pin 10 is made of copper alloy or phosphor bronze for spring and has a structure shown in FIGS. 6 and 7. That is, the hook pin 10 includes two flexible leg portions 15 which are spaced apart from each other and are parallel to each other, a disc-shaped head portion 16 in which these leg portions are connected to each other at one end side thereof, and these leg portions. Two hooks 17 projecting outwardly from each other at the other end
And The outer surface of the two legs 15 has a shape along a cylindrical shape having a diameter slightly larger than the hole 13 of the ground contact 4. Further, the inner surfaces of the two leg portions 15, that is, the surfaces facing each other are formed in a flat shape. That is, the structure is such that the slot 18 is provided between the two leg portions 15 to provide spring properties.

The head 16 has substantially the same shape as the hole 11 of the shell 1 and has an outer diameter slightly larger than that of the hole 11. Furthermore, a large number of small projections 19 are attached to the outer peripheral surface of the head 16 by providing a notch. Each of the small protrusions 19 extends in the axial direction of the hook pin.

The surface of each hook 7 on the side of the head 16 is an engaging surface 21 that is perpendicular to the axis of the hook pin 10, and the surface on the opposite side is an inclined surface 22 that is inclined with respect to the axis of the hook pin 10. It is said that. The engagement surface 21 is a surface for engaging with the hook receiving surface 14 of the ground contact 4. on the other hand,
The inclined surface 22 functions as a guide surface when the hook pin 10 is passed through the hole 11 of the shell 1 and the hole 13 of the ground contact 4.

Next, the assembly of the receptacle connector with ground will be described. First, the ground contact 4 and the power supply contact 5 are held by the shell 1 via the front insulator 2 and the rear insulator 3. Next, the leg 15 of the hook pin 10 is inserted through the hole 11 of the shell 1 and the hole 13 of the ground contact 4, and the head 16 is press-fitted into the hole 11 of the shell 1. This work can be easily performed because the inclined surface 22 of the hook 7 functions as a guide surface. As a result of this work, hook pin 1
The 0 leg portion 15 is pressed against the inner surface of the hole 13 of the earth contact 4 by its elastic restoring force. Therefore, the ground contact 4 is electrically connected to the shell 1 via the hook pin 10. At the same time, the engaging surface 21 of the hook 7 engages with the hook receiving surface 14 of the ground contact 4. Therefore, the hook pin 4 can be prevented from coming off without using an adhesive.

FIGS. 8 to 13 show a grounded receptacle connector according to another embodiment of the present invention. This grounded receptacle connector is different from the above-mentioned embodiment in that the ground contact 4 is electrically connected to the shell 1 by the press-fitting pin 20 in place of the hook pin 10, and the other points are different. This is the same as the embodiment.

That is, in the above embodiment, the hook pin 10 is brought into contact with the inner surface of the hole 13 of the ground contact 4 by the elastic restoring force of the leg portion 15. However, in this receptacle connector with ground, As shown in FIG. 9, the press-fitting pin 20 is pressed into contact with the inner surface of the hole 13 of the ground contact 4. Further, in this case, as the ground contact 4, the one having only the hole 13 as shown in FIGS. 10 and 11 can be used instead of the one in which the hook receiving surface 14 is formed as in the previous embodiment. . As described above, since the ground contact 4 having no hook receiving surface 14 can be used, it is not necessary to cut the ground contact 4 for forming the hook receiving surface 14, and there is an advantage that the cost can be reduced. .

As shown in detail in FIGS. 12 and 13, the press-fitting pin 20 includes a head portion 26 having a large number of small protrusions 29 and a body portion 25 having protrusions 28 formed on the outer periphery thereof. It is composed. The body portion 25 of the press-fitting pin 20
The outer diameter of is formed to be slightly larger than the inner diameter of the hole 13 of the ground contact 4. When the press-fitting is performed, the protrusion 28 of the body portion 25 makes the hole 13 of the ground contact 4
The press-fitting pin 20 is fixed in the hole 13 by biting into the inner surface of the. In the embodiment of FIGS. 8 to 13,
It is manufactured by press-fitting the press-fitting pin 20 as described above while the ground contact 4 is positioned by using an appropriate jig.

In the case of the previous embodiment, since the ground contact 4 and the hook pin 10 are fixed by the elastic restoring force of the leg portion 15 of the hook pin 10, the contact between the ground contact 4 and the hook pin 10 is prevented. There is a possibility that point contact may result in insufficient fixation of both, the ground contact may move, and there may be problems such as stress on the insulator because there is no support between the shell and the ground contact. This is not the case with the embodiments of FIGS.

That is, in the case of this receptacle contact with ground, the ground contact 4 and the press-fitting pin 20 and the press-fitting pin 20 and the shell 1 are fixed by press-fitting. Pin 2
The contact with 0 is ensured, and since the contact surfaces are exactly matched, the corrosion resistance of the ground contact 4 or the press-fitting pin 20 is improved. Further, since the press-fitting pin 20 and the ground contact 4 cannot be completely moved with respect to the shell 1 due to the press-fitting, there is an advantage that stress is not applied to the rear insulator 3.

14 and 15 show a press-fitting pin 3 according to another embodiment.
0 is shown. In this press-fitting pin 30, instead of the projection 28, the press-fitting side of the body portion 35 into the hole 13 of the ground contact 4 is partially cut away to provide a slit 38. Such a slot 38 may be in the form of a straight line as shown in the figure, or in other forms such as a cross. The outer diameter of the body portion 35 is formed to be slightly larger than the inner diameter of the hole 13 of the ground contact 4. Then, at the time of the above press-fitting, the slit 3 at one end of the body portion 35
By slightly bending the inward direction 8, the press-fitting pin 30 can be easily pressed into the hole 13 of the ground contact 4.

In the above description, the conductive power source contact 5 is 3
The case where two or more lines are provided has been described, but the number of lines may be two or four or more. Also, a large number of small projections 19 on the outer peripheral surface of the head 16 or the body
It goes without saying that the protrusions 28 and the like can have various shapes.

[0028]

As described above, according to the receptacle connector with ground of the present invention, it is not necessary to bond it with an adhesive, and there is less risk that the axis of the ground contact will shift.

[Brief description of the drawings]

FIG. 1 is a front view of a grounded receptacle connector according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

3 is a cross-sectional oblique view showing only a main part of the grounded receptacle connector of FIG. 1. FIG.

4 is a side view of a ground contact included in the grounded receptacle connector of FIG. 1. FIG.

5 is a bottom view of the ground contact of FIG. 4.

6 is a front view of a hook pin included in the grounded receptacle connector of FIG. 1. FIG.

7 is a side view of the hook pin of FIG.

FIG. 8 is a cross-sectional view of a grounded receptacle connector according to another embodiment of the present invention.

9 is a cross-sectional oblique view showing only a main part of the grounded receptacle connector of FIG.

10 is a side view of a ground contact included in the grounded receptacle connector of FIG. 8. FIG.

11 is a bottom view of the ground contact of FIG.

12 is a front view of a press-fit pin included in the grounded receptacle connector of FIG. 8. FIG.

FIG. 13 is a side view of the press-fitting pin of FIG.

FIG. 14 is a front view of another form of the press-fitting pin.

FIG. 15 is a bottom view of the press-fitting pin of FIG.

FIG. 16 is a front view of a conventional grounded receptacle connector.

17 is a sectional view taken along line XVII-XVII in FIG.

[Explanation of symbols]

 1 Shell 2 Front Insulator 3 Rear Insulator 4 Ground Contact 5 Power Contact 10 Hook Pin 11 Hole 13 Hole 14 Hook Receiving Surface 15 Leg 16 Head 17 Hook 18 Slit 19 Small Protrusion 20 Press-fit Pin 21 Engagement Surface 22 Inclined Surface 25 Body Part 28 Protrusion 30 Press-fit pin 35 Body 38 Slit

Claims (7)

[Claims] 1. A grounded receptacle connector including a cylindrical conductive shell, a conductive ground contact disposed inside the shell, and a conductive member electrically connecting the ground contact to the shell. The conducting member includes a hook pin having a plurality of flexible legs, a head portion on one end side of the leg portion, and a hook on the other end side of the leg portion, and is opposed to the shell and the ground contact. Each of which has a hole extending in the radial direction, the leg portion is inserted into the hole of the earth contact through the hole of the shell, and the head portion is press-fitted into the hole of the shell so that the leg portion has an elastic restoring force. By press-contacting the inner surface of the hole of the ground contact with the hook, and engaging the hook with the ground contact to prevent the hook pin from coming off. Receptacle connector with base. 2. A grounded receptacle connector including a cylindrical conductive shell, a conductive ground contact arranged inside the shell, and a conductive member electrically connecting the ground contact to the shell, The conducting member includes two flexible legs that are spaced apart from each other and are parallel to each other, and a disk-shaped head portion in which the two legs are coupled to each other at one end side thereof and the two legs. A hook pin having two hooks protruding outwardly from each other on the other end side of
The shell and the earth contact are provided with holes extending in the radial direction so as to face each other, and the two leg portions are inserted into the holes of the earth contact through the holes of the shell, and the head portion of the shell is provided. Pressed into the hole, presses each of the two legs to the inner surface of the hole of the earth contact by its elastic restoring force, and engages the two hooks with the earth contact to prevent the hook pin from coming off. A receptacle connector with a ground characterized by the above. 3. A grounded receptacle connector including a cylindrical conductive shell, a conductive ground contact disposed inside the shell, and a conductive member electrically connecting the ground contact to the shell. The conducting member includes a press-fitting pin having a body portion at least a part of which has an outer diameter slightly larger than a hole of the earth contact and a head portion on one end side of the body portion, and the shell and the earth contact are mutually connected to each other. It is characterized in that holes facing each other in the radial direction are provided respectively, the body portion is press-fitted into the hole of the earth contact through the hole of the shell to be engaged with the head portion, and the head portion is press-fitted into the hole of the shell. A grounded receptacle connector. 4. An engagement protrusion extending in the axial direction of the body is formed on an outer periphery of the body, and an outer diameter of a portion of the body where the engagement protrusion is formed is the ground. The grounded receptacle connector according to claim 3, wherein the receptacle connector is slightly larger than the hole of the contact. 5. The grounded receptacle connector according to claim 3, wherein the other end of the body is partially removed. 6. The receptacle connector with a ground according to claim 1, wherein the ground contact is held by the shell via an insulator having elasticity. 7. The head portion has a plurality of protrusions on its peripheral surface that engage with the inner surface of the hole of the shell.
A receptacle connector with a ground according to any one of 1.