JPH10106689A - Shield plate for pin jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the efficiency of a mounting operation by providing slots into which the ground terminals of a pin jack are inserted and which are joined to the outer peripheral surfaces of the ground terminals, forming the inner peripheral edge of each slot into a projection, and providing slits in each projection. SOLUTION: A shield plate 3 is provided with slots 4 into which the ground terminals of a pin jack main body are individually inserted, and a projection 5 having a plurality of slits 6 is formed on the edge of each hole 4. The projection 5 formed around each hole 4 is provided with the plurality of slits 6 in such a way that the slits are arranged radially while taking opposite positions across the center of the projection 5 in order to absorb, by means of its property of a spring, the dimensions caused by variation in dimensional accruing during insertion of the shield plate 3. Therefore if there are dimensional differences caused by variations in the size and interval or the like of each slot 4 formed in the shield plate 3 via the projection 5 and in the outside diameter 4Q or interval or the like d the ground terminal, the dimensional differences are absorbed by the spring property of the projection 5 to achieve displacement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin jack shield plate for electrically connecting a metal housing of an electronic device to a ground terminal of a pin jack fixed to the housing.

[0002]

2. Description of the Related Art Conventionally, when a pin jack is fixed to a metal housing of an electronic device, EMI (Electro-Magnetic) is required.
As a countermeasure, as shown in FIGS. 9 and 10, a pin jack 21 is fixed to a housing 22 with screws 23 via a metal shield plate 20.

In this case, as shown in FIG. 11, a dimension taking into consideration the workability of inserting and mounting the outer peripheral surface 24a of each ground terminal 24 of the pin jack and the insertion hole 25 formed in the shield plate 20 is taken into consideration. The setting was performed, and the individual insertion holes 25 of the shield plate were formed as long holes approximating a circle.

The minor axis length φD1 of the insertion hole 25 formed in the long hole is set slightly smaller than the outer diameter φD of the ground terminal 24 of the pin jack as illustrated in FIG. The major axis length dimension φD2 is the outer diameter dimension φ of the terminal 24.
It is set slightly larger than D. A plurality of slits 25a are provided on the long axis side of the insertion hole 25 toward the outside, and are joined to the ground side terminal 24 while the diameter of the short axis side is slightly displaced. Had gained credibility.

However, the insertion hole 25 formed in the shield plate 20
Since the variation of the pitch size and the outer diameter of the ground terminal 24 of the pin jack 21 becomes large because the displacement amount of the hole diameter of the hole is small, it is difficult to insert the shield plate 20 into the ground terminal 24. Influence, the insertion force becomes too large,
There has been a phenomenon that the shield plate 20 cannot be inserted, or conversely, the plastic deformation of the shield plate 20 causes unstable contact between the shielded plate 20 and the ground terminal 24 after joining. Furthermore, when the jigs and the like are improved in response to the increase of the insertion force and the forcible insertion is performed, a flaw to be inserted is formed at a joint portion between the shield plate 20 and the ground side terminal 24, at an outer peripheral surface of the ground side terminal 24. This occurred at 24a, and there was a problem in appearance.

For the above reasons, one shield plate
The maximum number of ground-side terminals 24 that can be joined at the same time was about four. Therefore, in order to satisfy the function of the shield plate, it is necessary to minimize variations in the outer diameter and pitch of the ground terminal 24 of the pin jack body 21 and minimize the variations in the shield plate 20 capable of absorbing the variations. Form, specifically insertion hole
25 shapes and dimensions need to be set.
20 good insertion workability and contact stability were required.

As described above, the conventional pin jack shield plate 20 has the outer diameter and the pitch of the ground terminal 24 of the pin jack body 21 and the dimensions and the pitch of the insertion hole 25 of the shield plate 20. The variation in dimensional accuracy such as dimensions
The reliability of the electrical contact resistance between the outer peripheral surface of 24 and the inner peripheral surface of the insertion hole 25 of the shield plate 20 and the insertion of the shield plate 20 into the ground terminal 24 and the attachment to the pin jack body 21 This has a significant effect on workability, and furthermore, there is a limit to the number of ground terminals 24 that can be joined at the same time.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the conventional shield plate, the present invention has been developed in consideration of the outer diameter of the ground terminal of the pin jack, its pitch, and the hole of the shield plate. Absorbs variations in dimensional accuracy such as dimensions and pitch dimensions,
It is another object of the present invention to provide a pin jack shield plate capable of simultaneously joining many pieces.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the structure of the pin jack shield plate of the present invention is provided so as to cover the front surface of the pin jack body. A grounding terminal of the pin jack is inserted into the shield plate, and an insertion hole is formed to be joined to an outer peripheral surface of the grounding terminal, and an inner peripheral edge of the insertion hole is formed in a projection. Further, a slit is provided on the projection from the inner peripheral end of the insertion hole toward the outside.

In the pin jack shield plate according to the present invention, the pin jack shield plate may have an attachment portion attached to a side surface of the pin jack shield plate and fixed to the pin jack body.

Further, in the pin jack shield plate of the present invention, the front surface of the pin jack shield plate in the above configuration may be electrically joined and fixed to a metal housing of an electronic device. .

[0012]

In the pin jack shield plate of the present invention, the difference between the inner diameter of the insertion hole of the ground terminal of the pin jack and the outer diameter of the ground terminal, and the insertion hole of the shield plate. Dimensional differences due to variations in dimensional accuracy, such as the difference between the pitch of the ground terminal and the pitch of the ground terminal, are absorbed by the spring property of the projection formed on the shield plate, and the outer peripheral surface of the ground terminal is not damaged. With an appropriate insertion force, it becomes possible to perform the work of inserting and mounting the shield plate.

The outer diameter of the projection of the shield plate for the pin jack of the present invention is almost the same as the outer diameter of the guide ring portion of the insulating cover of a normal pin jack that does not use the shield plate. It is set, it is possible to unify the size of the fitting hole of the metal housing of the electronic device, it is easy to position, and the good assembling workability of the electronic device set is secured.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a pin jack mounting structure using a pin jack shield plate (hereinafter simply referred to as a shield plate) according to an embodiment of the present invention and a shield plate. It is a figure which shows the detailed shape etc. of FIG.

The shield plate 3 of the present invention shown in FIG. 2 is provided with insertion holes 4 into which the respective ground terminals 2 of the pin jack body 1 are individually inserted. A projection 5 having a slit 6 is formed. The protruding portion 5 has a rising dimension (1.2 to 2.0 mm) which is higher than the plate thickness dimension (normally about 0.8 to 1.2 mm) of the metal housing 2 (not shown).
mm height). Therefore, the plurality of slits 6 are provided on the protrusion 5 from the inner end 5a of the insertion hole 4 toward the outer periphery.

The dimensions of each insertion hole 4 are slightly smaller than the outer diameter of the ground terminal 2 of the pin jack 1 by design.
A short axis length φD2 set in a direction perpendicular to the pitch direction of each hole 4;
Is a long hole set with the long axis length dimension φD1 set in the pitch direction.

The projection 5 formed around the hole 4 has the center of the projection 5 in order to absorb a dimension due to a variation in dimensional accuracy when the shield plate 3 is inserted by a spring property. A plurality of, in the example shown, four slits 6 are provided so as to form a radial shape in such a position that they face each other, and the number of the slits 6 and the width and length dimensions of the slits are as follows.
The design is set in each case according to the number of the ground terminals 2 of the pin jack body 1 to be joined and the size of the rising dimension of the projection 5. In other words, as the number of joints between the ground side terminal 2 and the insertion hole 4 increases, the resiliency of the protrusion 5 of each hole 4 is required, so that the performance is secured by increasing or decreasing the number of the slits 6 or the length of the slits. become.

The inner peripheral surface 5a of the projection 5 in the insertion hole 4 of the shield plate 3 is set so as not to be parallel to the outer peripheral surface 2a of the ground terminal 2 as illustrated in FIG. The cross-sectional shape of the rising end of the protrusion 5 is an arc-shaped R
Alternatively, a chamfer is provided, and the outer peripheral surface 2a of the ground terminal 2 is provided.
The edge of the end portion of the inner peripheral surface 5a of the shield plate 3 is formed so as not to bite or be damaged by the edge. In addition, even when the inner peripheral surface 5a is parallel to the outer peripheral surface 2a of the ground terminal 2, the edge 51a at the inner lower end of the inner peripheral surface 5a is pressed so as not to affect the insertion and attachment work. The pin jack body 1 is formed with a sag surface during molding, and the surface treatment of the shield plate is also plated with tin alloy.
The surface hardness is lower than that of the nickel plating of the ground side terminal 2. Further, a space is provided between the inner peripheral surface of the rising cylindrical portion of the protrusion 5 and the outer peripheral surface 2a of the ground terminal 2.
The insertability at the initial stage of inserting the insertion hole 4 of the shield plate 3 into the terminal 2 is also improved. In the above description, the inner surface 5a of the projection 5 is set so as not to be parallel to the outer peripheral surface 2a of the ground terminal 2, but may be set so as to be parallel to the inner peripheral surface 2a.

Accordingly, in the shield plate 3 of the present invention, the size and pitch of each of the insertion holes 4 formed on the shield plate 3 through the projections 5 and the outer diameter of the grounding terminal 2 of the pin jack. When there is a dimensional difference due to a variation in the dimension φD, pitch, or the like, the protrusion 5 absorbs the dimensional difference due to the resiliency and is displaced.

Further, the outer diameter dimension φD3 of the projection 5 of the shield plate 3 is the same as that of the guide ring portion 32 of the insulating cover 31 in a normal pin jack 33 without using the shield plate illustrated in FIG. The dimensions of the metal housing 7 of the electronic device illustrated in FIG. 6 are substantially the same as the outer diameter, and the dimensions of the metal housing 7 with respect to the fitting hole 8 are unified. The ability to do so simplifies the assembly of electronic equipment sets.

FIGS. 7 and 8 show a pin jack mounting structure using a pin jack shield plate according to a second embodiment of the present invention and the detailed shape of the shield plate.
In FIG. 7, the basic structure of the shield plate 31 is the same as that of the shield plate 3 of FIGS. 1 to 4, except that the left and right side surfaces of the shield plate 31 An attachment hole 31a that fits and is fixed to the formed locking projection 11a is provided. 7 and 8, the same reference numerals as those in FIGS. 1 to 4 denote the same components.

The wing-shaped mounting portions 31L and 31R which are bent on both left and right side surfaces of the shield plate 31 and the bent portion 31U which is bent on the upper surface form the shield plate 31 as a whole. A shield plate 31 formed of a thin plate with increased torsional strength
The dimensional accuracy of In other words, if warpage or torsion occurs in the shield plate 31, it goes without saying that variations in pitch dimensions and the like increase, and if the number of grounding terminals to be joined increases, the warp or torsion of the shield plate 31 will increase. This has a great adverse effect on the reliability of the electrical contact resistance of the joint and the workability of insertion and mounting.

Accordingly, mounting portions 31L and 31R for fixing to the pin jack body 11 are provided on the left and right side surfaces of the shield plate 31, and a bent margin portion 31U is formed on the upper surface, so that the shield plate 3 is provided.
While preventing warpage and twisting of the pin jack body 1
Prevents dropping from 1. In other words, the reliability of the contact resistance of the joint is improved, and at the same time, the dropout failure before being incorporated into the electronic device is greatly reduced.

FIG. 6 is a view showing an example of a mode of attaching a pin jack to an electronic device using a pin jack shield plate according to an embodiment of the present invention.

In FIG. 6, reference numeral 1 denotes a pin jack body;
Is a metal shield plate according to the present invention formed so as to enhance the spring property, and 7 is a metal housing of the electronic device. As described above, the pin jack main body 1 is joined to the metal housing 2 via the shield plate 3 of the present invention, and is fixed by, for example, screws 9. Note that the fixing method is not limited to the screw 9. In the above embodiment, the insertion hole 4 provided in the shield plate 3 of the present invention is a long hole close to a circle.
The insertion hole 4 can also be formed in a perfect circular shape depending on the material of the solder plate and the development of processing technology.

[0026]

As described above, according to the pin jack shield plate of the present invention, the insertion hole size and pitch size of the shield plate and the outer diameter size and pitch of the ground terminal of the pin jack are provided. Dimensional differences due to variations in dimensions are absorbed by the spring properties of the projections having slits formed in the insertion holes of the shield plate, and even when the number of joints with the ground side terminal increases, the Since the rigidity can be ensured by the bending margin by the protrusion, the reliability and the seal of the electrical contact resistance between the outer peripheral surface of the ground terminal of the pin jack and the inner peripheral surface of the insertion hole of the shield plate are improved. This provides an excellent effect of maintaining the workability of inserting and mounting the shield plate at an extremely high quality level.

In addition, since the shield plate is provided with a mounting portion for holding the pin jack main body, the shield plate does not fall off from the pin jack main body before being incorporated into the electronic device. This is a major contributor to improving efficiency.

In addition, the outer diameter of the projection formed in the insertion hole is formed so as to substantially match the outer diameter of the guide ring of the insulating cover of a normal pin jack without using a shield plate. Accordingly, an excellent effect is obtained such that the dimensions of the fitting hole for attaching the pin jack of the metal housing of the electronic device can be unified, and the assembling workability of the electronic device set can be maintained favorably.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing a mounting structure of a pin jack shield plate to a pin jack according to an embodiment of the present invention.

FIG. 2 is a perspective view of a shield plate of FIG. 1;

FIG. 3 is an enlarged sectional view of an insertion hole of the shield plate of FIG. 2;

FIG. 4 is a perspective view of the pin jack of FIG. 1;

FIG. 5 is a perspective view of an example of a pin jack that does not use a shield plate.

FIG. 6 is an exemplary perspective view showing an example of how the pin jack of FIG. 4 is attached to an electronic device;

FIG. 7 is a perspective view of another example of the shield plate of the present invention.

FIG. 8 is a perspective view of an example of a pin jack using the shield plate of FIG. 7;

FIG. 9 is a longitudinal sectional view showing a mounting mode of a pin jack to an electronic device using a conventional shield plate.

10 is a front view of the pin jack shown in FIG. 9 before being attached.

11 is an enlarged front view of an insertion hole of the shield plate in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pin jack body 2 Grounding terminal 3 Shield plate 4 Insertion hole 5 Protrusion 6 Slit 7 Metal housing 8 Fitting hole 9 Screw

Claims (3)

[Claims] 1. A pin jack shield plate disposed over a front surface of a pin jack body, wherein a ground terminal of the pin jack is inserted, and an insertion hole is provided for joining to an outer peripheral surface of the ground terminal. A pin jack shield, wherein an inner peripheral edge of the insertion hole is formed in a projection, and a slit is provided in the projection from the inner peripheral end of the insertion hole toward the outside. Board. 2. The pin jack shield plate according to claim 1, wherein a mounting portion for mounting and fixing to the pin jack body is formed on a side surface. 3. A pin jack according to claim 1, wherein said pin jack shield plate is electrically and mechanically joined and fixed to a metal housing of an electronic device in a sectional shape thereof. For shield plate.