JP2011198839A - Clip terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of clip terminals and manufacture at a lower cost, and when maintenance after assembly is necessary, positioning is easy even when a shield case is manually attached after maintenance is completed. Provides a clip terminal that can be securely mounted in the correct position and can prevent electromagnetic waves from entering or leaking through the gap even if there are some gaps in the corners of the shield case To do.
A clip terminal for positioning and holding a shield case is disposed close to the side surface of the shield case from the outside, and is bent in an L shape along the side surface of the shield case at a corner of the shield case. This is achieved by a clip terminal having a side wall formed with a bent portion of a predetermined shape.
[Selection] Figure 1

Description

  The present invention relates to a clip terminal for holding a shield case, and in particular, a shield case for preventing electromagnetic waves from entering from an external environment and unnecessary electromagnetic waves radiated from internal electronic components to the outside. Is related to a clip terminal which is arranged and fixed at a predetermined position of a circuit board.

  It is widely known to use a shield case to prevent the intrusion and radiation of electromagnetic waves. Normally, electronic components are placed on a circuit board, soldered to complete the circuit, and then covered with a shield case and fixed. In addition, an electronic component is housed inside the shield case to prevent electromagnetic waves from entering and radiating.

  As described above, when the shield case is fixed to the circuit board so as not to be detachable by soldering or the like, it is necessary to perform soldering or maintenance (hereinafter referred to as maintenance or the like) of the components stored in the shield case. In this case, the shield case that has been fixed must be removed. Therefore, in a circuit that may require maintenance of components housed in the shield case after assembly is complete, it is essential to make the shield case removable.

  For this reason, it has been considered that the lower part of the side surface of the shield case is held and fixed by a terminal (hereinafter referred to as a clip terminal) so as to hold the shield case in a detachable manner. By connecting at least one of the clip terminals to the ground terminal of the circuit board, the shield case is grounded to prevent intrusion and radiation of electromagnetic waves (see Patent Documents 1-3). ).

  For example, as shown in FIG. 6 in which FIG. 4 of FIG. 4 of Patent Document 2 is transcribed, this clip terminal is held by holding the lower portion of the side surface 51 of the shield case 50 with a clip portion 52 having a spring property. The clip terminal 53 is configured to connect the mounting shaft 54 connected to the clip portion 52 to the ground of the circuit board 55 so that the shield case 50 is grounded to prevent intrusion and radiation of electromagnetic waves. Yes.

  Further, as shown in FIG. 7 which is an explanatory diagram obtained by transcribing FIG. 1 of Patent Document 3, clip portions 61 having spring properties are formed at two locations of the clip terminal 60, and a shield case (illustrated) is formed by the clip portions 61. No) is provided, and a pickup tab 62 is provided in the middle. In Patent Document 3, the pickup tab 62 is provided by being pushed and bent downward when the lower part of the side surface of the shield case is inserted into the clip part 61, and the tip thereof is close to the lower end part of the side surface of the shield case. The shield case is configured to be prevented from coming off by engaging with the notch, and the back surface side of the lower surface 63 is soldered to a circuit board (not shown).

Japanese Patent Laid-Open No. 11-4093 (see page 2-3, FIG. 4) Japanese Patent Laid-Open No. 11-186777 (see page 2-3, FIG. 1-3) Japanese Unexamined Patent Publication No. 2000-196280 (see page 2-3, FIG. 1-3)

  However, many of these clip terminals are arranged along the side surface of the shield case (see FIG. 4 of Patent Document 1 and FIG. 3 of Patent Document 2), or one each at the center of the side surface of the shield case ( Since the clip terminals shown in FIG. 2 of Patent Document 3 are arranged, a large number of clip terminals are mounted on the circuit board in the examples of Patent Document 1 and Patent Document 2, and four clip terminals are mounted on the circuit board in the example of Patent Document 2 as well. Therefore, the number of parts is increased, and the number of assembly processes is also increased, which inevitably becomes expensive.

  Furthermore, when maintenance of the parts stored in the shield case is over and the shield case is to be mounted again, it must be done manually. It must be installed after confirming that the sides are properly positioned above the clip.

  In particular, if one clip terminal is placed at the center of the side, it can be attached even if the sides of the shield case are slightly tilted, so make sure that the direction of the sides is correct. Must. Since the shield case attached with the direction of the side tilted does not look good, it has been a troublesome work such as having to re-attach it even if there is no functional problem.

  Furthermore, when the shield case is a simple shield case with only the side bent (see FIG. 4), gaps are likely to occur at the corners, and unwanted electromagnetic waves can enter or leak from here. The circuit could be adversely affected.

(Object of invention)
The present invention solves the above-mentioned problems, reduces the number of clip terminals, reduces the number of assembly steps, and manufactures at a lower cost.When maintenance after assembly is required, the maintenance is completed. Even when the shield case is manually attached, positioning is easy and it can be reliably installed in the correct position.Even if there is a slight gap in the corner of the shield case, electromagnetic waves enter from this gap, Or it aims at providing the clip terminal which can prevent leaking.

  In order to achieve the above object, the clip terminal according to the present invention is a clip terminal for positioning and holding a shield case, and is disposed close to the side surface of the shield case from the outside, and the shield at the corner of the shield case. It has the side wall in which the bending part of the shape bent in the L-shape along the side surface of the case was formed.

  The clip terminal further includes at least two clip portions arranged in different directions, each holding two side surfaces that are in contact with corner portions of the shield case.

  Further, in the clip terminal, the side wall in which the bent portion is formed and at least two clip portions arranged in different directions are arranged at the same corner portion of the shield case. And

  Further, the clip terminal is provided with a suction surface that serves as a suction position during conveyance.

  Since the clip terminal of the present invention is configured as described above, the shield case can be securely attached at a predetermined position only by arranging two clip terminals on the diagonal line of the shield case. As for the confirmation of the position, since the bent part of the L-shaped shape is formed on the side wall of the clip terminal, only the corner part of the shield case is aligned with the bent part of the two clip terminals arranged on the diagonal line. Moreover, since the clip terminal is located at the diagonal line, the sides of the shield case are not inclined and can be easily attached by hand.

  Moreover, since the bent part of the shape bent in the L shape along the side surface of the shield case is formed on the side wall of the clip terminal at the corner part of the shield case, even if there is a gap in the corner part of the shield case The gap is covered with a bent portion, and unnecessary electromagnetic waves can be prevented from entering or leaking to adversely affect the circuit.

One Example of the clip terminal of this invention is shown, (a) is a top view, (b) is a front view, (c) is a side view. It is the perspective view seen from the arrow direction of FIG. It is a top view which shows arrangement | positioning of the clip terminal of this invention. It is a perspective view which shows the clearance gap between the corner | angular parts of a shield case. When using the clip terminal of this invention, it is a perspective view which shows that the side wall of a clip terminal covers the clearance gap between the corner | angular parts of a shield case. It is explanatory drawing which transcribe | transferd FIG. 4 of patent document 2 which shows an example of the clip terminal of a prior art. It is explanatory drawing which showed other examples of the clip terminal of a prior art, and transcribe | transferred FIG.

  Embodiments of the present invention will be described below with reference to the drawings showing examples.

  1 and 2 are drawings showing an embodiment of a clip terminal according to the present invention. FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a right side view. 2 is a perspective view as seen from the direction of the arrow in FIG. 1 (a) and from the direction of the arrow in FIG. 1 (b).

  FIG. 3 is a plan view showing the arrangement of the clip terminals when the shield case is mounted using the clip terminals of the present invention. FIG. 4 is a perspective view showing a gap generated at the corner of the shield case, and FIG. 5 is a side view showing the gap at the corner of the shield case when the clip terminal of the present invention is used. It is a perspective view which shows covering.

  As shown in FIG. 4, the shield case 30 normally covers a predetermined range in order to block electromagnetic waves, and has a side surface 31 formed by bending in four directions. In many cases, a gap 33 is often formed in the corner portion 32 formed in contact with the. Of course, it is possible to manufacture so that the gap 33 does not occur, but it is inevitable that the manufacturing cost will increase accordingly.

  The clip terminal 10 according to the present embodiment positions and holds such a shield case 30 at a predetermined position on the circuit board. As shown in FIGS. 1 to 3, the planar shape as a whole is an L-shape. The side wall 12 is provided on the outer side. The side wall 12 is also bent along this L-shaped shape to form a bent portion 13.

  Therefore, as shown in FIG. 3, the clip terminal 10 has the side wall 12 disposed close to the side surface 31 of the shield case 30 from the outside at the corner portion 32 of the shield case 30 on the side surface 31 of the shield case 30. A bent portion 13 having a shape bent along an L shape is formed.

  Two clip portions 14 and 15 that hold the side surface 31 of the shield case 30 are disposed at positions on both sides of the bent portion 13. As is apparent from FIGS. 1 and 3, the clip portions 14 and 15 are arranged such that the clip portion 14 is in the horizontal direction and the clip portion 15 is in the vertical direction. ing.

  In the present embodiment, one clip portion is shown as each of the vertical clip portion 14 and the horizontal clip portion 15, but when it is necessary to strengthen the holding force of the shield case 30, Needless to say, the number is not limited to one, and can be increased to two or more as needed.

  Therefore, the clip terminal 10 has at least two clip portions 14 and 15 arranged in different orientations, that is, a horizontal direction and a vertical direction for holding the two side surfaces 31 that are in contact with each other at the corner portion 32 of the shield case 30. ing.

  As shown in FIG. 1B, the clip portions 14 and 15 have two spring portions 17 that are bent and protruded from both the side wall 12 and the inner side wall 16. The lower part of the side surface 31 of the shield case 30 is inserted and held. Then, as shown in FIG. 3, the horizontal clip portion 13 and the vertical clip portion 14 are formed on the shield case 30 so as to hold the two side surfaces 31 that are in contact with each other at the corner portion 32 of the shield case 30. They are arranged in different directions at the same corner 32.

  Therefore, the clip terminal 10 includes the side wall 12 in which the bent portion 13 is formed and at least two clip portions 14 and 15 arranged in different directions at the same corner portion 32 of the shield case 30. Yes.

  Further, the clip terminal 10 is provided on the surface of the plate 11 located below the bent portion 13 of the side wall 12 at a position intermediate between the clip portions 14 and 15 arranged in different directions as described above (FIG. A suction surface 18 indicated by hatching is provided in a).

  And since it is comprised in this way, as shown in FIG. 3, when the corner | angular part 32 of the shield case 30 is match | combined with the position of the bending part 13 of the side wall 12, the position of the side surface 31 of the shield case 30 will be automatically set. If it is located above the horizontal clip part 14 and the vertical clip part 15 and is performed at two diagonal lines, even if the shield case 30 is manually attached, alignment at only two diagonal lines is performed. Thus, the shield case 30 can be securely attached to a predetermined position without being inclined.

  Further, the clip terminal 10 of the present invention has a side wall 12, and is arranged close to the side wall 12 from the outside at a corner portion 32 of the shield case 30, along the side surface 31 of the shield case 30. Since the bent portion 13 having a bent shape is formed, even if there is a gap 33 in the corner portion 32 of the shield case 30, the gap 33 is formed at the bent portion 13 of the side wall 12 as shown in FIG. Therefore, it is possible to prevent unnecessary electromagnetic waves from entering or leaking and adversely affecting the circuit.

  In FIG. 5, in order to easily understand the relationship between the side wall 12 of the clip terminal 10 and the gap 33 of the shield case 30, the gap 33 of the shield case 30 is drawn above the bent portion 13 of the side wall 12. However, it is obvious that electromagnetic waves can be reliably prevented from entering and leaking by making the bent portion 13 of the side wall 12 sufficiently high.

  Therefore, the bent portion 13 of the side wall 12 serves as a mark when the shield case 30 is manually attached, and even if there is a gap 33 in the corner portion 32 of the shield case 30, It also serves as an external seal that prevents intrusion and leakage.

  In the embodiment shown in FIG. 3, the clip terminals 10 are arranged only at the two locations on the upper right and the lower left. It may be desirable to do so. Thus, even if the clip terminals 10 are arranged at four locations, the number of clip terminals is the same as that of the invention of Patent Document 3, and a number of clip terminals are used as in the inventions of Patent Document 1 and Patent Document 2. Compared with, the number of clip terminals is small and it is still cheaper.

  Further, the clip terminal 10 is provided with a suction surface 18 below the bent portion 13 of the side wall 12. The suction surface 18 is a flat surface for sucking and transporting the clip terminal 10 by the supply head of the assembly machine when the clip terminal 10 is assembled to the circuit board. A part of the plate 11 located below the bent portion 13 of the side wall 12 is extended and provided at a position intermediate between the clip portions 14 and 15 so as to be close to the position. Of course, it is not limited to this position as long as it can be reliably adsorbed. And since it is comprised in this way, it can mount simultaneously with other components, such as an electronic component, and can be soldered simultaneously by reflow.

  Since the clip terminal of the present invention is configured as described above, the shield case can be securely mounted at a predetermined position only by arranging two clip terminals on the diagonal of the shield case. Since only two pieces are sufficient, even if the unit price per piece rises, it is possible to make it cheaper by reducing the number, and in the assembly process, assembly time can be reduced, and Since it can be soldered by reflow simultaneously with other electronic components, the cost of the assembly process can be greatly reduced.

  Even when the shield case is attached manually after maintenance, the clip terminals are bent in an L-shape on the side walls of the clip terminals, so that the two clip terminals bent diagonally are bent. What is necessary is just to confirm a position only by a part, and since the edge | side of a shield case is not inclined and attached, it can mount | wear easily.

  Moreover, since the bent part of the shape bent in the L shape along the side surface of the shield case is formed on the side wall of the clip terminal at the corner part of the shield case, even if there is a gap in the corner part of the shield case The gap is covered with a bent portion, and unnecessary electromagnetic waves can be prevented from entering or leaking to adversely affect the circuit.

DESCRIPTION OF SYMBOLS 10 Clip terminal 11 Plate 12 Side wall 13 Bending part 14,15 Clip part 16 Inner side wall 17 Spring part 18 Adsorption surface 30 Shield case 31 Side surface 32 Corner | angular part 33 Crevice

Claims (4)

For clip terminals that position and hold the shield case,
The side wall of the shield case is disposed close to the side surface, and has a side wall formed with a bent portion bent in an L shape along the side surface of the shield case at a corner portion of the shield case. Clip terminal.   2. The clip terminal according to claim 1, further comprising at least two clip portions arranged in different directions, each holding two side surfaces that contact each other at a corner portion of the shield case. 3. .   In the clip terminal, the side wall in which the bent portion is formed and the at least two clip portions arranged in different directions are arranged at the same corner portion of the shield case. The clip terminal according to claim 1 or 2. The clip terminal according to any one of claims 1 to 3, wherein the clip terminal is provided with a suction surface serving as a suction position during conveyance.

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