JP3851526B2 - Earth terminal - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earth terminal that short-circuits a printed circuit board with other members such as a chassis and a shield plate in order to protect the device from a failure caused by electromagnetic waves or the like.
[0002]
[Prior art]
Conventionally, as a general earth terminal, “earth terminal” (utility model registration No. 3064756) is known.
[0003]
The “earthing terminal” includes “(Claim 1): a board part for mounting on a grounding pattern of a printed circuit board, and a spring contact protruding from one side of the board part to the side facing the board part. An earthing terminal comprising: an engaging wall that is integrally raised from the substrate part and engages with a tip part of the spring contact.
(2) The grounding terminal according to (1), wherein the engagement wall is a stopper whose front end engages with the front end of the spring contact.
(Claim 3) In the grounding terminal according to claim 1 or 2, the engagement wall is integrally raised from opposite sides of the base plate and engaged with both sides of the tip of the spring contact. This is a grounding terminal. In detail, as shown in FIG. 8, the board unit 101 is used by being attached to a ground pattern (not shown) of the printed circuit board 110 by soldering, and a short of the board unit 101. The pulling contact 102 is provided so as to be integrally contacted from the side and protrudes on the side facing the substrate unit 101, and is integrally raised from each long side from the substrate unit 101 and engaged with the spring contact 102. It consists of an engagement wall 103.
[0004]
The spring contact 102 includes a front end portion 102A, a first main body portion 102B that is integrally connected from the front end portion, and is provided to face the substrate portion 101, and the first main body portion 102B and the substrate portion 101. The second main body 102C is connected.
The engaging wall 103 serves as a stopper whose front end engages the front end 102 </ b> A of the spring contact 102. The engaging wall 103 is formed by integrally raising the horizontal wall 103A from the opposite long sides of the substrate portion 101 and bending the tip of the horizontal wall 103A so as to face each other. .
[0005]
Since the spring contact 102 is formed with elasticity, the tip end portion 102A of the spring contact 102 is provided so as to be positioned below the upper wall 103B of the locking wall 103, and the tip end portion 102A of the spring contact 102 is The upper wall 103B is engaged and the upward movement of the upper wall 103B is restricted.
The ground terminal of the conventional example formed as described above is used by fixing the substrate portion 101 on the pattern of the printed circuit board 110 by soldering. At this time, since the soldering of the grounding terminal is automatically performed, a plurality of grounding terminals are placed on the tape, and the first main body 102B of the spring contact 102 is vacuumed by the automatic placing device. The suction is moved and placed at a predetermined position on the printed circuit board 110, and the suction is released there to place the board portion 101 on the printed circuit board 110 with the surface opposite to the spring contact 102 facing down. The grounding terminal 101 is soldered onto the printed circuit board 110 in the same manner as other circuit elements on the printed circuit board 110 by passing the printed circuit board 110 through the soldering iron.
[0006]
Thus, the grounding terminal attached to the printed circuit board 110 is used in contact with a shield panel, chassis, frame or the like (not shown) for grounding with the ground pattern of the printed circuit board 110 when the product is assembled. .
Accordingly, the grounding terminal soldered to the printed circuit board 110 is attached so that the position of the first main body 102B is in a position where it is pressed against a shield panel, chassis, frame, etc. (not shown). For example, the printed circuit board 110 is accommodated through a ground terminal in a case in which a shield panel is mounted. As the printed circuit board 110 is housed, the spring contact 102 is pushed toward the board part 101 (inner side), and the tip part 102A leaves the engaging wall 103 as a stopper. In this state, the grounding terminal can maintain sufficient contact with the shield panel.
[0007]
The contact portion of the first main body 102B where the spring contact 102 actually contacts the shield panel or the like is in contact with the shield panel or the like, as in the non-contact state. Since it is necessary to be at a position higher than the portion 103B, an allowable width can be taken in the vertical swing range of the spring contact 102.
[0008]
[Problems to be solved by the invention]
However, the distal end portion 102A of the spring contact 102 that is engaged with the engagement wall 103 is opposite to the first main body portion 102B that is in contact with the shield panel or the like on the side of the substrate portion 101 that is the base end portion of the spring contact 102. When the spring contact 102 is brought into contact with the shield panel or the like and moved downward, the tip end portion 102A comes into contact with the board portion 101 first and comes into contact with the shield panel or the like. There is a problem that the movable range that can be moved is limited by the tip portion 102A. Accordingly, when a sufficient movable range of the first main body portion 102B as the contact portion is desired, the locking wall 103 is raised so that the gap between the substrate portion 101 and the first main body portion 102B is increased. Therefore, there is a problem that it is difficult to reduce the size of the grounding terminal. Further, since the distal end portion 102A to be engaged with the engaging wall 103 is in the above positional relationship, there is a problem that the total length of the grounding terminal is increased and it is difficult to reduce the size.
Furthermore, the spring contact 102 and the distal end portion 103B of the engagement wall 103 are formed by bending, and accuracy of bending is required in order to suppress the variation in finish dimensions of the product with high accuracy. As a result, the spring contact 102 is provided at one place between the substrate portion 101 and the second main body 102C, at one place between the second main body 102C and the first main body 102B, and between the first main body 102B and the first main body 102B. Bending is necessary at two places between the tip 102A and a total of four places. Similarly, the engagement wall also needs to be bent at two places, and there is a problem that accuracy of bending is required. did. In particular, the distal end portion 102A of the spring contact 102 is farthest from the movable base portion of the spring contact 102, so that even if the movable angle is small, the displacement of the distal end portion 102A becomes large, which greatly contributes to dimensional errors due to bending. Had.
The error of 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 a suction suction error by the automatic placement device on the printed circuit board 110. Has a problem.
[0009]
In view of the above problems, an object of the present invention is to provide an earth terminal that can be miniaturized in the height direction and the length direction.
[0010]
[Means for Solving the Problems]
This invention
[0011]
A base made of a plate-like body, the bottom surface of which forms a mounting portion that is attached to the printed circuit board, and a stopper that extends upward from both opposing sides of the base portion and has a locking hole formed in the middle portion A receiving portion, extending from the other side of the base portion to the side facing the upper surface of the base portion, a contact portion that can be elastically deformed from the extending portion, and extending from the opposite sides of the contacting portion to the base portion side, respectively. The grounding terminal is characterized in that the tip portion is formed with a locking portion that is locked with the locking hole of the stopper receiving portion, and the stopper is restricted from moving upward by locking with the locking hole. ,
[0012]
as well as,
[0013]
It consists of a plate-like body, and the bottom part is extended upward from both opposing sides of the base part and the base part forming the attachment part attached to the printed circuit board, and the tip part is bent to form the locking part A stopper, extending from the other side of the base portion to the side facing the upper surface of the base portion, a contact portion that can be elastically deformed from the extended portion, and extending from both sides of the contact portion facing the base portion side, respectively. An intermediate portion is formed with a stopper hole that is locked with a stopper locking portion, and a stopper receiving portion whose upward movement is restricted by the locking with the locking portion. Terminal,
[0014]
I will provide a. 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, since the locking portion provided in the stopper is locked in the locking hole formed in the stopper receiving portion, the contact portion provided on the side facing the upper surface of the base portion is stopped by its own elastic force. It stops at the position where the receiving part and the stopper are locked.
Then, when the contact portion is pressed toward the base portion, 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]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is an explanatory front view showing an embodiment of the present invention, FIG. 2 is an explanatory plan view of the same, FIG. 3 is an explanatory diagram of the right side, FIG. 4 is an explanatory diagram of the left side, and FIG. FIG. 6 is a bottom explanatory view, FIG. 6 is an explanatory view showing a state in which the embodiment of the present invention is attached to a printed circuit board, and FIG. 7 is a front explanatory view of another embodiment.
[0016]
Reference numeral 1 denotes an earth terminal which is an embodiment of the present invention. The earth terminal 1 is formed by punching a conductive metal plate and bending and punching it. The earth terminal 1 includes a base portion 2, a stopper receiving portion 3, a contact portion 4, and a stopper 5.
[0017]
The base portion 2 is formed in a plate state, and the bottom surface 21 is attached by being soldered to the printed circuit board PCB. Accordingly, the bottom surface 21 forms a mounting portion. On the long side 22 of the bottom surface 21, a soldering portion 23 for soldering to the printed circuit board PCB is formed so as to protrude from two locations. Thus, by forming the soldering portion 23, stability when the ground terminal 1 is attached to the printed circuit board PCB for soldering is maintained. Therefore, if it is desired to use the ground terminal 1 with a narrow width, it may be formed without providing the soldering portion 23. The base portion 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.
[0018]
That is, the stopper receiving part 3 is integrally bent at substantially right angles from the two soldering parts 23 provided on each longitudinal side 22 to the upper surface 25 side of the base part 2. Then, the bent stopper-receiving portion 3 is formed in a shape in which the central portion is stamped and formed to have a locking hole 31 and the tip portion is connected. Therefore, in actually manufacturing the earth terminal 1, the locking hole 31 is first punched and then bent to the upper surface 25 side of the base portion 2, and the soldering portion 23 of the base portion 2 and the facing 1 are opposed to each other. A pair of stopper receiving portions 3 is formed.
[0019]
The contact portion 4 is formed by punching from one short side 24 of the base portion 2 and further bent to 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 the linear portion 42 is linearly inclined in an oblique direction with respect to the upper surface 25 of the base portion 2 following the curved portion 41. Provided. Further, a parallel part 43 is provided continuously from the tip of the straight part 42 so as to be substantially parallel to the upper surface 25 of the base part 2. And the parallel part 43 of the contact part 4 has the earth terminal 1 attached to the printed circuit board PCB, and comes into contact with other members such as a shield panel, a chassis, and a frame. Further, the curved portion 41, the straight portion 42, and the parallel portion 43 of the contact portion 4 are formed to have the same width as the short side 24 of the base portion 2.
[0020]
The stopper 5 is provided by being bent substantially at right angles from the opposite sides 44 of the contact portion 4 to the base portion 2 side. And the front-end | tip of the stopper 5 is bent at a substantially right angle so that it may be inserted and located in the locking hole 31 drilled in the stopper receiving part 3, and the locking part 51 is formed. Accordingly, 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 further, the locking portions 51 as the tip portions are respectively bent outward to be the locking holes of the stopper receiving portion 3. It will be in the state inserted in 31.
[0021]
The ground terminal 1 formed as described above has a contact portion 4 extending from the base portion 2 to the upper surface side and is elastically deformed mainly in the curved portion 41, and is in the locking hole 31 of the stopper receiving portion 3. The locking part 51 inserted through the locking hole 31 is locked with the locking hole 31. Therefore, when the contact portion 4 is pressed toward the base portion 2 and is elastically deformed, the member pressed by the elastic force and the contact portion 4 can maintain the pressing contact by the elastic force.
[0022]
Therefore, in order to ground the printed circuit board PCB, which is the purpose of the ground terminal 1, to the other member A such as a chassis or a shield plate in a state where the ground terminal 1 is soldered and fixed to the printed circuit board PCB, the printed circuit board is used. The other member A is assembled to the main body of an electronic device or the like to which the PCB is attached. Then, first, the other member A 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 mainly the bending portion 41 deepens the bending. When the contact portion 4 is deformed and is pressed and deformed 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 in a press contact state by the elastic force of the contact portion 4. Will be grounded.
[0023]
Other embodiments will be described below.
In another embodiment, as shown in FIG. 7, the stopper 5 is formed by being bent from the long side 22 of the base portion 2, and the stopper receiving portion 3 is provided by being bent from the parallel portion 43 of the contact portion 4. It is done.
[0024]
That is, the stopper receiving portion 3 is bent from the side 44 of the contact portion 4 to the base portion 2 side at a substantially right angle as in the previous embodiment, and a locking hole 31 is formed in the center portion. .
The stopper 5 is bent 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 the tip portion further bends the locking portion 51 at a substantially right angle as in the previous embodiment. Bend and form.
Accordingly, in other embodiments, the stopper receiving portion 3 and the stopper 5 are provided in the same manner as in the previous embodiment, and the base portion 2 is also formed in the previous embodiment except that the stopper 5 is bent from the long side 22. Since the stopper receiving portion 3 is also bent from the side 44 to the base portion 2 side, the contact portion 4 is also formed in the previous embodiment except that the parallel portion 43 is formed longer than the previous embodiment. It is the same as the form.
The operation of the other embodiments is the same as that of the previous embodiment.
[0025]
【The invention's effect】
According to this invention, since the stopper and the stopper receiving portion are locked at the intermediate portion of the contact portion, the contact portion is pressed more than when the stopper and the stopper receiving portion are locked at the end portion of the contact portion. The deformable movable range can be widened. Therefore, in the same movable range, it is possible to reduce the size in the height and length directions as compared with the conventional example.
In addition, the locking position is the middle part, the distance from the movable base end of the contact part is short, and the locking hole of the stopper receiving part which is one of the locking members is more precise than bending. Due to the good drilling process, there is an effect that the dimensional error of the product due to the processing error of the contact part, the stopper and the stopper receiving part can be reduced. Similarly, the inclination error from the water level direction of the parallel part provided in the contact part becomes small, and the suction suction mistake by the automatic placement device can be reduced.
[Brief description of the drawings]
FIG. 1 is an explanatory front view illustrating the embodiment. FIG. 2 is an explanatory plan view illustrating the embodiment. FIG. 3 is an explanatory right side illustrating the embodiment. FIG. 4 is an explanatory left side illustrating the embodiment. FIG. 5 is a bottom explanatory view showing an embodiment. FIG. 6 is an explanatory view showing a state attached to a printed circuit board. FIG. 7 is a front explanatory view showing another embodiment. FIG. [Explanation of symbols]
PCB Printed circuit board A Other members 1 Ground terminal 2 Base portion 21 Bottom surface 22 Long side 23 Soldering portion 24 Short side 25 Upper surface 3 Stopper receiving portion 31 Locking hole 4 Contact portion 41 Curved portion 42 Linear portion 43 Parallel portion 44 Side 5 Stopper 51 Locking part

Claims (2)

A base portion comprising a plate-like body and forming a mounting portion whose bottom surface is attached to a printed circuit board;
A stopper receiving portion that extends upward from both opposing sides of the base portion and has a locking hole formed in the middle portion;
A contact portion extending from the other side of the base portion to the side facing the upper surface of the base portion and elastically deformable from the extended portion;
Extending from the opposite sides of the contact part to the base part side, the tip part forms a locking part that locks with the locking hole of the stopper receiving part, and moves upward by locking with the locking hole An earth terminal characterized by comprising a stopper that is regulated. A base portion comprising a plate-like body and forming a mounting portion whose bottom surface is attached to a printed circuit board;
A stopper that extends upward from both opposing sides of the base part, the tip part is bent to form a locking part,
A contact portion extending from the other side of the base portion to the side facing the upper surface of the base portion and elastically deformable from the extended portion;
Extending from the opposite sides of the contact part to the base part side, a locking hole that is locked to the locking part of the stopper is drilled in the middle part, and moves upward by locking with the locking part An earth terminal characterized by comprising a stopper receiving portion that is regulated.

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