JP2003069250A - Earth terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earth terminal which can be reduced in size in the height direction and the length direction. SOLUTION: The earth terminal comprises a base part 2 having a bottom face 21 forming a part being fixed to a printed circuit board, a stopper receiving part 3 extending upward from the opposite sides 22 of the base part 2 with a stopping hole 31 being made at an intermediate part, a contact part 4 extending from one side 24 of the base part 2 to the side facing the upper surface 25 thereof and is deformable resiliently from a bend part 41, and a stopper 5 extending from the opposite sides 44 of the contact part 4 to the base part 2 side with the forward end part thereof forming a part 51 stopping in the stopping hole 31 at the stopper receiving part 3 thus regulating movement to the base part 2 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth terminal that short-circuits a printed circuit board on which electronic components are mounted with other members such as a chassis and a shield plate in order to protect the device from damage due to electromagnetic waves and the like. .

[0002]

2. Description of the Related Art Conventionally, as a general ground terminal, "ground terminal" (utility model registration No. 306475)
No. 6) is known.

This "ground terminal" is "(Claim 1)"
A grounding terminal comprising: a board portion for attaching to a ground pattern of a printed circuit board; and a spring contact integrally projecting from one side of the board portion to a side facing the board portion, the board further comprising: The grounding terminal is characterized in that an engaging wall is provided which is integrally raised from the portion and is engaged with the tip end portion of the spring contact. (Claim 2) In the grounding terminal according to claim 1,
The grounding terminal, wherein the engaging wall is a stopper having a tip end portion for locking the tip end portion of the spring contact. (Claim 3) In the grounding terminal according to claim 1 or 2, the engaging wall is integrally raised from opposite sides of the base plate portion and engages with both sides of the tip end portion of the spring contact. Grounding terminal characterized by the following. ]
In detail, as shown in FIG. 8, the substrate unit 101 is
The printed circuit board 110 is provided so as to be integrally contacted from one short side of the printed circuit board 110, which is used by being attached to a ground pattern (not shown) by soldering,
The pulling contact 102 is provided so as to project from the side facing the board portion 101, and the engagement wall 103 that is integrally raised from each long side of the board portion 101 and engages with the spring contact 102.

The spring contact 102 is
A tip portion 102A, a first body portion 102B that is integrally connected from the tip portion and is provided so as to face the substrate portion 101, and a second body portion that connects the first body portion 102B and the substrate portion 101. And 102C. Further, the engaging wall 103 has a tip portion which serves as a stopper for locking the tip portion 102A of the spring contact 102. The engagement wall 103 is formed by integrally raising the lateral walls 103A from opposite sides of the base plate portion 101, which are long sides, and bending the ends of the lateral walls 103A to provide upper walls 103B so as to face each other. .

Since the spring contact 102 is formed to have elasticity, the spring contact 10
The front end portion 102A of the second spring 102 is provided so as to be located under the upper wall 103B of the locking wall 103, and the spring contact 1
The front end portion 102A of 02 is engaged with the upper wall 103B and is restricted from moving upward from the upper wall 103B. The conventional grounding terminal thus formed is used by fixing the board portion 101 to the pattern of the printed circuit board 110 by soldering. At that time, since the grounding terminals are automatically soldered, a plurality of grounding terminals are placed on the tape, and the first main body portion 102B of the spring contact 102 is vacuumed by the automatic placement device. By adsorbing and moving to a predetermined position on the printed circuit board 110, and releasing the adsorption there, the surface of the board portion 101 opposite to the spring contact 102 is placed on the printed circuit board 110, and then placed. By passing the printed circuit board 110 through the solder bath, the grounding terminals 101 are soldered onto the printed circuit board 110 like other circuit elements on the printed circuit board 110.

The grounding terminal thus mounted on the printed circuit board 110 is brought into contact with a shield panel, chassis, frame or the like (not shown) for grounding the grounding pattern of the printed circuit board 110 when the product is assembled. Used. Therefore, the grounding terminal soldered to the printed circuit board 110 is attached so that the position of the first main body portion 102B is in a position where it is pressed into contact with the shield panel, chassis, frame or the like (not shown).
For example, this is performed by housing the printed circuit board 110 through a ground terminal in a case in which a shield panel is mounted. As the printed circuit board 110 is accommodated, the spring contacts 102 are attached to the board portion 10.
The tip portion 102A is pushed to the side 1 (inside), and leaves the engagement wall 103 which is a stopper. In this state, the grounding terminal can maintain a sufficient contact state with the shield panel.

The first body portion 102B in which the spring contact 102 actually contacts the shield panel or the like
The contact area of is in contact with the shield panel,
As in the case of the non-contact state, it is necessary to be at a position higher than the tip end portion 103B of the engagement wall 103, so that an allowable width can be set in the vertical swing range of the spring contact 102.

[0008]

However, the tip portion 102A of the spring contact 102 that is locked to the engagement wall 103 is different from the first body portion 102B that is in contact with the shield panel or the like with respect to the base of the spring contact 102. Since the spring contact 102 is located on the side opposite to the end portion on the side of the substrate portion 101, which is the end portion, when the spring contact 102 is brought into contact with a shield panel or the like and moved downward, the tip portion 102A comes into contact with the substrate portion 101 first. However, there is a problem that the movable range that can be moved when coming into contact with the shield panel or the like is limited by the tip portion 102A. Therefore, when it is desired to secure a sufficient movable range of the first main body portion 102B which is the contact portion, the locking wall 103 is raised to form a large gap between the substrate portion 101 and the first main body portion 102B. However, it is difficult to reduce the size of the grounding terminal, which is a problem. Further, since the front end portion 102A that engages with the engagement wall 103 is in the above-mentioned positional relationship, there is a problem that the total length of the grounding terminal becomes large and it is difficult to reduce the size. Furthermore, the spring contact 102 and the engagement wall 1
The tip portion 103B of 03 is formed by bending,
Bending accuracy is required in order to suppress variations in finished dimensions with good accuracy. Then, the spring contact 102 is provided at one place between the substrate portion 101 and the second main body 102C, and the second main body 102C and the first main body 102C.
One location between B, the first body 102B and the tip 102
Bending is required at 2 places between A and 4 places,
Similarly, the engaging wall also needs to be bent at two places, and there is a problem in that bending accuracy is required. Particularly, since the tip end portion 102A of the spring contact 102 is farthest from the movable base portion of the spring contact 102, the displacement of the tip end portion 102A becomes large even if the moving angle is small.
There is a problem that it greatly contributes to a dimensional error due to bending. The error in the upper surface position of the first main body 102B due to these bending errors causes the upper surface position to be inclined from the horizontal, and causes an error in suction and adsorption by the automatic placement device on the printed circuit board 110. I had a problem.

In view of the above problems, an object of the present invention is to provide an earth terminal which can be miniaturized in the height direction and the length direction.

[0010]

Means for Solving the Problems

A base portion, which is formed of a plate-like member and has a bottom surface that forms a mounting portion to be mounted on the printed circuit board, and extends upward from both opposing sides of the base portion, and a locking hole is formed in the middle portion. And a stopper receiving portion that extends from the other side of the base portion facing the upper surface of the base portion, and elastically deformable contact portions from the extended portion, and the base portion side from both opposing sides of the contact portion. It is extended, the front end portion forms a locking portion that locks with the locking hole of the stopper receiving portion, and comprises a stopper whose upward movement is restricted by locking with the locking hole. Earth terminal,

And

A base portion, which is formed of a plate-like member and has a bottom surface that forms a mounting portion to be mounted on the printed circuit board, and extends upward from both opposing sides of the base portion. The tip portion is bent and the locking portion is formed. And a stopper that forms the base portion, and a contact portion that extends from the other side of the base portion that faces the upper surface of the base portion and that is elastically deformable from the extended portion, and that extends from both opposing sides of the contact portion to the base portion side. A stopper hole is provided in the intermediate portion, and a stopper hole for engaging with a stopper portion of the stopper is formed, and a stopper receiving portion whose upward movement is restricted by the engagement with the stopper portion is characterized. Earth terminal,

[0014] The operation of the present invention is as follows. The ground terminal is fixed to the printed circuit board by attaching the mounting portion of the base portion to the printed circuit board. In the earth terminal, the engaging portion provided on the stopper is engaged with the engaging hole formed in the stopper receiving portion, so that the contact portion provided on the side facing the upper surface of the base portion is stopped by the elastic force of itself. The receiving portion and the stopper are stopped at the locked position. Then, when the contact portion is pressed toward the base portion side, the engagement between the stopper locking portion and the stopper receiving portion is released, and the contact portion is moved to the base portion side.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front explanatory view showing an embodiment of the present invention, FIG. 2 is a plan explanatory view of the same, and FIG.
FIG. 4 is an explanatory view of the right side surface, FIG. 4 is an explanatory view of the left side surface, FIG. 5 is an explanatory view of the bottom surface, and FIG. 6 is an explanatory view showing a state in which an embodiment of the present invention is attached to a printed circuit board. FIG. 7 is a front explanatory view of another embodiment.

Reference numeral 1 is an earth terminal which is an embodiment of the present invention. The ground terminal 1 is formed by punching out a conductive metal plate, and then bending and punching the metal plate. The earth terminal 1 includes a base portion 2, a stopper receiving portion 3, a contact portion 4, and a stopper 5.

The base portion 2 is formed in a plate state and has a bottom surface 2
1 is attached to the printed circuit board PCB by soldering. Therefore, the bottom surface 21 forms a mounting portion. Bottom 21
2 are formed on the long side 22 of each of the soldering portions 23 for soldering to the printed circuit board PCB. By forming the soldering portion 23 in this manner, the ground terminal 1 is connected to the printed circuit board PCB.
Keeps stability when soldered to. Therefore, if it is desired to reduce the width of the earth terminal 1, it may be formed without providing the soldering portion 23. And the base part 2
Is formed by integrally bending the stopper receiving portion 3 from the long side 22 and the contact portion 4 from the short side 24.

That is, the stopper receiving portion 3 has the long sides 22
From the two soldering portions 23 provided on the base portion 2 to the upper surface 2
They are bent and formed integrally on the 5 side at substantially right angles. Then, the bent stopper receiving portion 3 is formed in a shape in which the central portion is stamped and formed with a locking hole 31, and the leading end portion is connected. Therefore, in actually manufacturing the ground terminal 1, the locking hole 31 is first punched and then bent toward the upper surface 25 side of the base portion 2, and the soldering portion 23 of the base portion 2 and the facing portion 1 face each other. A pair of stopper receiving portions 3 will be formed.

The contact portion 4 is one of the short sides 2 of the base portion 2.
4 is formed by punching and is further bent toward the upper surface 25 side of the base portion 2. The base end portion of the contact portion 4 on the base portion 2 side is gently curved as a curved portion 41, and a linear portion 42 is formed linearly in a diagonal direction with respect to the upper surface 25 of the base portion 2 following the curved portion 41. It is provided. Further, the straight portion 42
A parallel portion 43 is continuously provided substantially parallel to the upper surface 25 of the base portion 2 from the tip of. Then, the parallel portion 43 of the contact portion 4
The ground terminal 1 is attached to the printed circuit board PCB and is brought into contact with other members such as a shield panel, a chassis and a frame. In addition, the curved portion 41 of the contact portion 4,
The straight line portion 42 and the parallel portion 43 are formed to have the same width as the short side 24 of the base portion 2.

The stopper 5 is formed by the opposite sides 44 of the contact portion 4.
To the base portion 2 side, respectively. The tip of the stopper 5 is bent at a substantially right angle so as to be inserted and positioned in the locking hole 31 formed in the stopper receiving portion 3 to form the locking portion 51. Therefore, the stoppers 5 are provided from the contact portion 4 to the base portion 2 side so as to face each other in parallel, and the locking portions 51, which are the front end portions, are bent outwardly to lock the locking holes of the stopper receiving portion 3. It is in a state of being inserted into 31.

In the earth terminal 1 formed as described above, the stopper receiving portion 3 is locked while the contact portion 4 extending from the base portion 2 to the upper surface side is elastically deformed mainly in the curved portion 41. The locking portion 51 inserted through the hole 31 is locked with the locking hole 31. Therefore, when the contact portion 4 is pressed toward the base portion 2 side and elastically deformed, the member pressed by the elastic force and the contact portion 4 can maintain the pressed contact by the elastic force.

Therefore, in order to ground the printed circuit board PCB, which is the purpose of the ground terminal 1, to the other members A such as the chassis and the shield plate while the ground terminal 1 is soldered and fixed to the printed circuit board PCB, Another member A is assembled to the main body of the electronic device or the like to which the printed circuit board PCB is attached. Then, the other member A first comes into contact with the parallel portion 43 of the contact portion 4 of the earth terminal 1, and when the assembly of the other member A is advanced, the contact portion 4 is pressed and the bending portion 41 mainly deepens the bending. When the contact portion 4 is deformed and deformed by pressing toward the base portion 2 and the assembly of the other member A is completed, the other member A and the ground terminal 1 are pressed and contacted by the elastic force of the contact portion 4. Will be grounded at.

Another embodiment will be described below. In another embodiment, as shown in FIG. 7, the stopper 5 is formed by bending the long side 22 of the base portion 2 and the stopper receiving portion 3 is formed by bending the parallel portion 43 of the contact portion 4. To be

That is, the stopper receiving portion 3 is bent from the side 44 of the contact portion 4 toward the base portion 2 at a substantially right angle as in the previous embodiment, and the engaging hole 31 is formed in the central portion. Is provided. The stopper 5 is formed by bending from the longitudinal side 22 of the base portion 2 to the upper surface side, that is, the contact portion 4 side at a substantially right angle, and similarly to the previous embodiment, the tip portion further bends the locking portion 51 at a substantially right angle. Bend and form. Therefore, in another embodiment, the stopper receiving portion 3 and the stopper 5 are respectively provided in the same manner as in the previous embodiment, and the base portion 2 is also implemented in the previous embodiment except that the stopper 5 is formed by bending from the long side 22. Since the stopper receiving portion 3 is formed by bending the contact portion 4 from the side 44 toward the base portion 2 side in the contact portion 4 as well, the parallel portion 43 is formed to be slightly longer than that in the previous embodiment. It is similar to the form. The operation of the other embodiments is similar to that of the previous embodiment.

[0025]

According to the present invention, since the stopper and the stopper receiving portion are locked at the intermediate portion of the contact portion,
The movable range in which the contact portion can be pressed and deformed can be made wider than in the case where the stopper and the stopper receiving portion are locked at the end portion of the contact portion. Therefore, if the movable range is the same, the size can be reduced in the height and length directions as compared with the conventional example. Further, since the locking position is the middle part, the distance from the movable base end part of the contact part is short, and the locking hole of the stopper receiving part, which is one of the locking members, is more accurate than bending. Since good drilling is performed, there is an effect that a dimensional error of the product due to a processing error of the contact portion, the stopper and the stopper receiving portion can be reduced. Similarly, the inclination error of the parallel portion provided in the contact portion from the water level direction is reduced, and the suction / adsorption error due to the automatic placement device can be reduced.

[Brief description of drawings]

FIG. 1 is a front explanatory view showing an embodiment.

FIG. 2 is an explanatory plan view showing an embodiment.

FIG. 3 is a right side explanatory view showing an embodiment.

FIG. 4 is a left side view illustrating the embodiment.

FIG. 5 is an explanatory bottom view showing the embodiment.

FIG. 6 is an explanatory view showing a state where the printed circuit board is attached.

FIG. 7 is a front explanatory view showing another embodiment.

FIG. 8 is an explanatory diagram of a conventional example.

[Explanation of symbols]

PCB printed circuit board A Other members 1 Earth terminal 2 base 21 Bottom 22 Long side 23 Soldering part 24 Short sides 25 upper surface 3 Stopper receiving part 31 Locking hole 4 contact part 41 curved part 42 Straight part 43 Parallel part 44 sides 5 stopper 51 Locking part

Claims (2)

[Claims] 1. A base portion, which is formed of a plate-like member and has a bottom surface that forms a mounting portion to be mounted on a printed circuit board, and extends upward from both opposing sides of the base portion. The stopper receiving portion to be bored, the contact portion extending from the other side of the base portion facing the upper surface of the base portion, and the elastically deformable contact portion from the extended portion, and the base portion side from both opposing sides of the contact portion. Have been extended to
An earth terminal, characterized in that the tip portion forms a locking portion that is locked with the locking hole of the stopper receiving portion, and comprises a stopper whose upward movement is restricted by locking with the locking hole. 2. A base portion which is made of a plate and has a bottom surface which forms a mounting portion to be mounted on a printed circuit board, and the base portion extends upward from both opposite sides of the base portion. A stopper that forms a stopper and a contact part that extends from the other side of the base part facing the upper surface of the base part and that is elastically deformable from the extended part and from both opposite sides of the contact part to the base part side. Each is extended,
An earthing hole, characterized in that an engaging hole for engaging with an engaging portion of the stopper is formed in an intermediate portion, and a stopper receiving portion whose upward movement is restricted by engaging with the engaging portion. Terminal.