JP2003115677A - Attaching structure to chassis of electrical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching structure to a chassis of an electrical component, in which tightening by a male screw is hardly loosened and a shield case (2) and the chassis (120) are surely electrically connected even when it is loosened. SOLUTION: On the shield case (2), other than a connection piece (12) to be screwed to the chassis (120) with the male screw together with a flange (8), an auxiliary contact piece (13) freely elastically deformably housed inside a release recessed part (15) of the flange (8) is integrally formed. Even when the male screw is loosened, the auxiliary contact piece (13) is brought into elastic contact with the chassis (120) and electric connection with the chassis (120) is maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting an electric component having an insulating housing covered with a shield case on a conductive chassis. The present invention relates to a structure for mounting an electrical component, which electrically connects a case to a chassis and grounds it, to the chassis.

[0002]

2. Description of the Related Art Electrical parts in which high-frequency signals flow through contacts, signal lines, etc. in an insulating housing have a shield case grounded on the outer peripheral surface of the insulating housing in order to shield the contacts, signal lines, etc. from the outside. Covering.

FIG. 7 shows a conventional chassis mounting structure 100 for mounting an electric connector 101, which is an electric component of this type, on a conductive chassis 120. The chassis 120 is usually a decorative panel of equipment ( (Not shown)
It is installed in parallel with and inside, and a part of it is connected to the ground and grounded.

The electrical connector 101 is a connector socket for connecting to a connector plug (not shown), and an insulating housing 103 having a recessed plug insertion hole into which the connector plug is inserted and fitted, and a contact with the plug insertion hole. A plurality of contacts 104, 104, ... Fixed inside the insulating housing 103 so as to face the parts are provided. The periphery of the insulating housing 103 is covered with a conductive shield case 105 except for the opening of the plug insertion hole.

On the left and right side surfaces of the insulating housing 103,
A pair of flange plates 106 each having a through hole 106a through which the conductive male screw 107 penetrates in the front-rear direction,
106 is integrally projected.

The shield case 105 has a through hole 106.
The connecting piece 108 formed in the same shape as the flange plate 106 including a is integrally formed, and when the shield case 105 is attached around the insulating housing 103, the connecting piece 108 is laminated on the surface of the flange plate 106. Through hole 106a of flange plate 106 and through hole 10 of connecting piece 108
8a communicates coaxially.

The electric connector 101 is screwed and fixed so as to be orthogonal to the chassis 120 while being inserted into the mounting hole 109 formed in the chassis 120. That is, as illustrated, the through hole 108a and the through hole 106
a and the through holes 102a on the side of the chassis 120 corresponding to these portions, the male screw 107 is inserted, and the chassis 120
The nut 110 is screwed onto the male screw 107 projecting to the back side of the connecting piece 10 between the male screw 107 and the nut 110.
8, the flange plate 106 and the chassis 120 are tightened and fixed.

By this screwing, the shield case 1
Reference numeral 05 is electrically connected to the chassis 120, which is connected to the ground via the conductive male screw 107, and grounded. The inside of the insulating housing 103 including the contact 104 for inputting and outputting a high frequency signal is shielded from the outside.

[0009]

However, the flange plate 1 of the insulating housing 103 formed of synthetic resin or the like is used.
Since the structure is such that 06 is clamped and screwed, when the flange plate 106 is deformed due to heat or aging, the connecting piece 1
08 or the distance between the chassis 120 and the chassis 120 becomes loose, which causes a defective connection between the shield case 105 and the chassis 120. This problem is particularly noticeable when the electrical component 101 is an electrical connector that is repeatedly inserted into and removed from the mating connector, and the flange plate 106 is repeatedly subjected to external force applied to the flange plate 106 during insertion and removal.
Was more easily deformed, and the male screw 107 was also easier to loosen.

Further, once, the male screw 107 and the nut 110 are
If the screwing between them loosens, they will not recover by themselves, so the reliability of the connection between the shield case 105 and the chassis 120 will only be lost, and the male screw will rotate freely.
Looseness accelerates further.

Further, since the shield case is indirectly electrically connected to the chassis 120 via the male screw 105, the contact resistance with the male screw 105 is interposed between the shield case and the ground, and the shield case is grounded. In addition, since the shield case is grounded only at the two places where the limited male screw 105 is inserted, a sufficient shield effect cannot be obtained.

In view of the above-mentioned problems, the present invention provides a structure for mounting an electrical component on a chassis, in which tightening by a male screw is not easily loosened, and even if it is loosened, the shield case and the chassis are securely electrically connected. To aim.

It is another object of the present invention to provide a structure for mounting an electric component on the chassis, which is grounded at a large number of positions of the shield case and has an improved shield effect.

[0014]

According to a first aspect of the present invention, there is provided a structure for mounting an electric component on a chassis, wherein an insulating housing having a flange portion protruding from a side surface and an outer peripheral surface of the insulating housing are attached to the insulating housing. In this state, the integral connecting piece is arranged along the surface of the flange part, the conductive chassis is arranged in parallel with the flange part of the insulating housing, and the connecting piece, the flange part and the chassis are penetrated. With the conductive screw installed, the flange of the insulating housing is sandwiched between the chassis and the connecting piece, and the conductive screw is passed through and tightened together, and the outer peripheral surface of the insulating housing is covered with a shield case. In addition to fixing the components to the chassis, attach the electrical components that electrically connect the shield case and the chassis via the conductive screws to the chassis. A relief recess is formed on the rear face of the flange facing the chassis at the base end side, and is accommodated elastically in the relief recess of the flange so that the free end projects from the relief recess in the free state. The contact piece is projected on the shield case, and the free end of the auxiliary contact piece elastically contacts the chassis when the chassis, the flange and the connection piece are fastened together with the conductive screw. .

When the chassis, the flange portion and the connecting piece are integrally tightened with the conductive screw, the free end portion of the auxiliary contact piece protruding toward the chassis side from the relief recess of the flange portion comes into contact with the chassis and elastically deforms. , Accommodated in the escape recess.

Thus, the shield case is electrically connected to the chassis through the connecting piece and the conductive screw, and
The auxiliary contact pieces also provide electrical connection to the chassis.

Since the auxiliary contact piece elastically contacting the chassis urges the flange portion and the connecting piece in the direction relatively away from the chassis, the conductive screw for fastening them is hard to loosen, and even if loose, the male screw And the connecting piece or the chassis come into contact with each other by the contact pressure generated by the elasticity of the auxiliary contact piece.

According to a second aspect of the present invention, there is provided a structure for mounting an electric component on a chassis, wherein a flange portion is sandwiched between the auxiliary contact piece and the connection piece, and the shield case is temporarily held by the insulating housing.

Since the shield case is temporarily held in the insulating housing, it is easy to screw the chassis.

According to a third aspect of the present invention, there is provided a structure for mounting an electric component on a chassis, wherein the electric component is an electric connector having contacts for inputting and outputting a high frequency signal attached to an insulating housing, and is orthogonal to a mating / unmating direction with a mating connector. And a flange portion is provided so as to project.

Even if external force is repeatedly applied to the flange portion to deform it due to insertion and removal with the mating connector, the auxiliary contact piece elastically contacts the chassis, so that the electrical connection between the shield case and the chassis is maintained. .

Even if the flange portion is deformed, the elasticity of the auxiliary contact piece causes the male screw and the connection piece to come into close contact with each other.
The electric parts are fixed to the chassis without rattling.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a mounting structure of an electric component according to an embodiment of the present invention to a chassis will be described with reference to FIGS.
Will be explained. 1 is a plan view of a connector socket 1 which is an electric component, FIG. 2 is a front view of the connector socket 1, and FIG. 3 is a cross-sectional view showing a state in which a mating connector 110 is connected to the connector socket 1 attached to a chassis 120. FIG. 4 is an exploded perspective view of an essential part showing attachment to the chassis 120, and FIGS. 5A, 5B, and 5C are plan views, front views, side views, and FIG. 6 of the shield case 2. (A),
(B) is a plan view and a cross-sectional view of the insulating housing 3.

As shown in these figures, the connector socket 1 which is an electric component is attached to a chassis 120 arranged along the inside of a decorative panel 121 of an electronic device, and is a multi-core wire wired in the electronic device. Shielded cable 13
It is a connector socket connected to the terminal 0, and is composed of an insulating housing 3, a plurality of contacts 5 attached to the insulating housing 3, a shield case 2 covering the periphery of the insulating housing 3, and an auxiliary case 4.

As shown in FIG. 6, the insulating housing 3 is
A rectangular parallelepiped body 3a made of insulating plastic resin
A pair of flange plates 8 projecting from both side surfaces of the main body 3a so as to be orthogonal to each other, and a contact guide plate 3c continuous to the rear side (left side in the figure) of the main body 3a are integrally formed. .

On the main body 3a of the insulating housing 3, from the front (right side in FIG. 6) to the rear, the cylindrical grounding metal fitting 11 of the connector plug 110 which is the mating connector is provided.
An insertion recess 6 for inserting 2 is provided. Insertion recess 6
Is formed in a horizontally long rectangular tube shape so as to fit with the cylindrical ground metal fitting 112.

At the center of the insertion recess 6, a connection plate 3b is provided which projects forward from the main body 3a. The connection plate 3b aligns the number of contacts 5 (four in this case) corresponding to each signal line 131 of the multi-core cable 130 and faces the insertion recess 6, and positions the contact portion 5a of the contact 5. Four recessed grooves to be attached are formed in the front-rear direction.

On the inner surface of the contact guide plate 3c, four concave grooves for positioning the leg portions 5b of the contacts 5 are formed with a wider pitch than the concave grooves in the insertion concave portion 6.

The contact 5 is formed by punching a conductive metal plate such as an adjacent bronze into a strip shape and then bending it as shown in FIG. 3. A part of the contact portion 5a is curved and inserted into the insertion recess 6. Signal terminal 111 of the plug connector 110
Individual contact with.

The stripped signal lines 131 of the multi-core cable 130 are solder-connected to the leg portions 5b of the contacts 5 at a wide pitch so that the soldered portions of the leg portions 5b do not come into contact with each other. It is positioned in the formed rear groove.

The shield case 2 has a flat surface and a rear surface (rear surface).
It covers the periphery of the insulating housing 3 except for, and is formed by punching out a conductive metal plate and bending it into a gutter shape shown in FIG.

After punching out the same conductive metal plate as the shield case 2, the auxiliary case 4 is formed into an L shape so as to cover the flat surface of the insulating housing 3 and the rear surface excluding the portion through which the multi-core shield cable 130 is inserted. It is formed by bending.
The auxiliary case 4 is integrated with the shield case 2 by folding the periphery of the auxiliary case 4 above the shield case 2 at the boundary with the shield case 2.
Substantially the entire circumference of the insulating housing 3 is covered with the shield case 2 and the auxiliary case 4.

In the front frame portion 2a that covers the front surface (front surface) of the insulating housing 3 of the shield case 2, grounding metal fitting insertion holes 10 along the contour of the opening edge of the insertion concave portion 6 are cut on the left and right inner peripheral surfaces. It is formed by punching, leaving a pair of raised tongues 7.

As shown in FIG. 5 (a), the tongue piece 7 is bent from the opening edge of the insertion recess 6 along its inner surface,
The cylindrical ground metal fitting 112 of the plug connector 110 contacts the tongue piece 7 and is inserted into the insertion recess 6 while elastically deforming inward.

The main body covering portion 2b, which is orthogonal to the front frame portion 2a and is continuous to the rear side, covers the left and right side surfaces and the bottom surface of the insulating housing 3. Of these, the main body covering portion 2b covers the left and right side surfaces.
A connecting piece 12 and an auxiliary contact piece 13 for sandwiching the flange plates 8 of the insulating housing 3 are provided in the middle of the above. That is, when the bottom surface side of the insulating housing 3 is housed in the gutter-shaped shield case 2, the flange plates 8, 8 protruding on both sides thereof are sandwiched by the connection piece 12 and the auxiliary contact piece 13, and the shield case 2 is insulated. The housing 3 is temporarily held. By temporarily holding both of them, the screwing work to the chassis 120, which will be described later, can be performed by holding only one shield case 2, and the work becomes easy.

As shown in FIG. 6, the rear surface of the pair of flange plates 8 facing the chassis 120, and the base end side thereof is thinned to form an escape recess 15. As shown in FIG. 4, after the base end of the auxiliary contact piece 13 protruding from the main body covering portion 2b comes into contact with the inner wall surface of the escape recess 15,
It is bent so as to be inclined slightly rearward, and as described above, when the insulating housing 3 is housed in the shield case 2, the flange plate 8 is provided between the base end of the auxiliary contact piece 13 and the connection piece 12. It will be sandwiched. Further, in this state, the free end portion 13a of the auxiliary contact piece 13 projects from the escape recess 15 and projects rearward from the back surface of the flange plate 8.

The connecting piece 12 is laminated on the front surface of the flange plate 8 and is formed by punching to have the same contour shape as the flange plate 8.

The flange plate 8 sandwiched between the connecting piece 12 and the auxiliary contact piece 13 on both sides is, as shown in FIG. 3, mounted in parallel along the front surface of the chassis 120 grounded to the ground. A conductive male screw 20 penetrating together with the piece 12 is projected to the back side of the chassis 120, tightened with the nut 18 on the back side, and screwed to the chassis 120. Therefore, the flange plate 8, the connecting piece 12, and the chassis 120 are provided with through holes 14, 16, and 17 through which the conductive male screw 20 passes.

When the connector socket 1 is screwed to the chassis 120, the free end portion 13a protruding from the rear surface of the flange plate 8 abuts on the chassis 120 and elastically deforms in the recessed portion 15 toward the front. The depth and size of the relief recess 15 are determined so that the flange 15 can be elastically deformed freely without interfering with the flange plate 8. Further, the length of the auxiliary contact piece 13 is also set such that the tip thereof does not reach the male screw 20 penetrating the through hole 14 when elastically deformed.

The flange plate 8 and the connecting piece 12 are attached to the chassis 12
By screwing to 0, the shield case 2 is fixed around the insulating housing 3, and the entire connector socket 1 is fixed to the chassis 120.

Further, the connection piece 12 is electrically connected to the chassis 120 through the conductive male screw 20, and the auxiliary contact piece 13 is elastically brought into elastic contact with the front surface of the chassis 120 to electrically connect to each other.

As shown in FIG. 5, in the shield case 2, a clamp metal fitting 2c electrically connected to the ground braided wire 132 of the multi-core shielded cable 130 is integrally provided behind the body covering portion 2b. . Clamp metal 2c
Is formed in a U-shaped cross section, and has a multi-core shielded cable 13
After being stripped at the end of No. 0, the ground braided wire 132 folded back on the outer skin is housed in the U-shape and is crimped so as to cover the periphery thereof.

By crimping the clamp metal fitting 2c, the end of the multi-core shielded cable 130 is mechanically fixed to the rear of the connector socket 1 and the inner signal line 131 and the contact 5 are surrounded. The shield case 2 and the ground braided wire 132 are electrically connected.

After the connector socket 1 is fixed to the chassis 120, the front of the chassis 120 including the male screw 20 is, as shown in FIG.
Except for a, it is covered with the decorative panel 121 of the electronic device.

Therefore, in the decorative panel 121, the insertion recess 6 and the ground metal fitting insertion hole 10 are exposed to the front, and as shown in FIG. 3, the plug recess 110 of the mating connector is inserted into the insertion recess 6 from the front. Cylindrical ground metal fitting 1
Insert 12 and connect. At this time, the cylindrical ground metal fitting 1
The tip of 12 has a tongue piece 7 bent at the opening edge of the insertion recess 6.
Elastically contact with a predetermined elasticity.

At the same time, the tubular ground metal fitting 112 is provided with the tongue piece 7.
To the shielded case 2, and the shielded case 2 is electrically connected to the grounded chassis 120 via the connecting piece 12 and the auxiliary contact piece 13 and further to the rear of the grounding of the multi-core shielded cable 130. Since it is electrically connected to the braided wire 132, the multi-core shielded cable 1 which is mutually connected
The entire 30 signal lines 131, contacts 5, and signal terminals 111 of the plug connector 110 are shielded.

According to this embodiment, the shield case 2 includes the pair of connecting pieces 12, 12 and the pair of auxiliary contact pieces 1.
Since it is electrically connected to the chassis 120 and grounded at four positions 3, 3 and 13, the shield case 2 can be shielded more reliably without an electric current flowing through the long distance.

Further, even if the mating connector 110 is repeatedly inserted and removed, and the tightening by the male screw 20 is loosened, the auxiliary contact piece 13 elastically contacts the chassis 120, so that the electrical connection between the shield case 2 and the chassis 120 is impaired. Never.

Further, by the elastic contact of the auxiliary contact piece 13 with the chassis 120, the connecting piece 12 is urged forward to contact the male screw 20, and the male screw 20 causes the nut 18 with which the male screw 20 is screwed to be attached to the chassis 120. Since the biasing force is applied so as to contact the rear side, even if the male screw 20 and the nut 18 are loosely screwed together, the electrical connection between the connecting piece 12 and the chassis 120 is maintained via the male screw 20, and the male screw 20 is also maintained. Since 20 does not rotate freely, rotation in the direction of loosening is not accelerated.

In the above-described embodiment, the shield case 2 covers the periphery of the insulating housing 3 together with the auxiliary case 4, but the insulating housing 3 is not always necessary.
It is not necessary to cover the entire periphery of the auxiliary housing 4 and may cover the insulating housing 3 integrally with the auxiliary case 4.

In the case where the chassis 120 is formed with a female screw which is screwed with the male screw 20 and is screwed with the male screw 20, the nut 18 is not necessarily provided.

Further, the electric parts are not limited to the connector sockets connected to the terminals of the multi-core shielded cable 130 and the electric connectors having the contacts 5 built in the insulating housing 3, but a shield case for shielding the inside of the insulating housing. Can be applied to various circuit parts, mechanical parts, etc., as long as they are electric parts attached to the surroundings.

[0053]

As described above, according to the present invention, the tightening by the male screw is not easily loosened, and even if it is loosened, the shield case and the chassis are electrically connected by the auxiliary contact piece, so that the shield case is surely secured. It is grounded and the shield effect is not impaired.

Further, in addition to the connecting piece, the auxiliary contact piece is also electrically connected to the chassis, so that the shield case is grounded at a number of positions and the shield effect is improved.

Furthermore, since the auxiliary contact piece is elastically deformed in the relief recess formed in the flange portion, it is not necessary to secure a deformation space around the electric component that does not contact with other parts.

Further, since the auxiliary contact piece elastically contacts the chassis to urge the flange portion and the connection piece in the direction away from the chassis, the conductive screw for fastening them is hard to loosen, and even if loosened, the male screw does not The screw and the connecting piece or the chassis come into contact with each other by a contact pressure generated by elasticity of the auxiliary contact piece.

In addition to this, according to the invention of claim 2,
Since the shield case and the insulating housing can be temporarily held before being attached to the chassis, only one of them can be used for the screwing work with the male screw, and the workability is improved.

In addition to this, according to the third aspect of the invention, even if an external force is applied to the flange portion to deform it by inserting / removing the mating connector, the elasticity of the auxiliary contact piece causes the male screw and the connection piece to come into close contact with each other. Therefore, the electric parts are fixed to the chassis without rattling, and the mating connector can be surely inserted / removed.

[Brief description of drawings]

FIG. 1 is a plan view showing a structure for mounting an electric component 1 on a chassis 120 according to an embodiment of the present invention.

FIG. 2 is a front view of the connector socket 1.

FIG. 3 is a cross-sectional view showing a state in which a mating connector 110 is connected to the connector socket 1 attached to the chassis 120.

FIG. 4 is an exploded perspective view of essential parts showing how the electric component 1 is attached to the chassis 120.

FIG. 5 shows a shield case 2, (a) is a plan view,
(B) is a front view and (c) is a side view.

FIG. 6 shows an insulating housing 3, (a) is a plan view,
(B) is a cross-sectional view.

FIG. 7 is a perspective view showing a conventional mounting structure 100 for mounting an electric component 101 on a chassis 120.

[Explanation of symbols]

1 connector socket (electrical parts) 2 shield case 3 Insulation housing 5 contacts 8 Flange part (flange plate) 12 connection pieces 13 Auxiliary contact piece 13a free end 15 escape recess 20 Male screw (conductive screw) 110 mating connector 120 chassis

Claims (3)

[Claims] 1. An integrated housing (3) having a flange (8) projecting from a side surface, and an integral connection covering the outer peripheral surface of the insulating housing (3) and attached to the insulating housing (3). Piece (12)
A shield case (2) is disposed along the surface of the flange portion (8), and a conductive chassis (120) is disposed in parallel with the flange portion (8) of the insulating housing (3). Piece (12), flange (8), chassis (12
0) penetrating the conductive screw (20), and the flange portion (8) of the insulating housing (3) is sandwiched between the chassis (120) and the connecting piece (12). ) Is passed through and tightened together, and the outer peripheral surface of the insulating housing (3) is shielded by the shield case (2).
The electrical component (1) covered with the is fixed to the chassis (120), and the electrical component for electrically connecting the shield case (2) and the chassis (120) via the conductive screw (20) is attached to the chassis. In the mounting structure, a relief recess (15) is provided on a rear surface of the flange portion (8) facing the chassis (120) so that the relief recess (15) of the flange portion (8) can be elastically deformed. An auxiliary contact piece (13) in which the free end (13a) projects from the escape recess (15) in the housed and free state is projected on the shield case (2), and the chassis ( The free end portion (13a) of the auxiliary contact piece (13) elastically contacts the chassis (120) when the 120), the flange portion (8) and the connecting piece (12) are fastened together. Electrical components to chassis Ri attached structure. 2. A flange part (8) is sandwiched between the auxiliary contact piece (13) and the connection piece (12), and the shield case (2) is temporarily held in the insulating housing (3). A structure for mounting the electric component according to 1 on a chassis. 3. The electrical component (1) is an electrical connector in which a contact (5) for inputting and outputting a high frequency signal is attached to an insulating housing (3), and a mating connector (11)
The flange part (8) is provided so as to be orthogonal to the insertion / removal direction with respect to 0), and the mounting structure of the electric component to the chassis according to claim 1 or 2, characterized in that.