JPH1154970A - Stand-alone terminal and radiator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stand-alone terminal and a radiator using it in which falling down, inclining and floating, etc., are suppressed without taking trouble to fit the radiator on a printed board, and fitting strength after soldering is sufficiently obtained. SOLUTION: This stand-alone terminal is provided with two through parts 4 which is inserted into a through hole 2a of a substrate 2 and so formed that a tip 5 is exposed from the opposite side of the substrate 2, a hitting surface part 6 which decides the depth of insertion of the through part 4 by being brought into contact with the substrate 2, and a guiding part 9 which guides insertion of the through part 4 by being inserted into another through hole 2b previous to the insertion of the through part 4. And in the tip part 5, the outer surface of it is tapered inward as it approaches the tip, and a returning surface 7 is formed on the side opposite to the outer surface, and the two through parts 4 are, after elastically deformed so as to approach each other to be inserted into the through hole 2a, separated by removing all or a part of the elastic deformation, and the returning surface 7 is, even when a force that tries to extract the through part 4 from the through hole 2a acts after insertion, brought into contact with a surface of the substrate 2, to prevent it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-standing terminal used for mounting a radiator for suppressing a rise in temperature of various semiconductors during operation of a printed circuit board used in various electric devices. And a radiator using the same.

[0002]

2. Description of the Related Art In a printed circuit board used for various electric devices, the temperature rise of various semiconductors is suppressed by a radiator, but when the radiator is mounted on a printed circuit board and soldered, the radiator is used. It is necessary to suppress the inclination, fall, floating, etc., and solder them. After soldering, it is necessary to guarantee the strength of soldering.

A conventional radiator has terminals for assuring strength after soldering and for providing an electrical grounding function. The terminals are attached to a printed circuit board in advance at the time of production, and the terminals are bent on the back surface or a jig or the like is used. The radiator is held by soldering to prevent the radiator from falling down, tilting, and floating.

[0004]

As described above, in the conventional radiator, after the radiator is soldered to the printed circuit board, it is necessary to suppress the inclination, the falling, and the floating of the radiator. It takes time and effort to use terminals and bend the terminals to create the conditions.

[0005] The present invention takes into consideration the problem that conventional radiators require time and effort at the time of production.
An object of the present invention is to provide a free-standing terminal capable of mounting a radiator on a printed circuit board while suppressing falling, inclination, floating, etc., and having sufficient mounting strength after soldering, and a radiator using the same. .

[0006]

In order to solve the above-mentioned problems, the present invention according to claim 1 is to simultaneously insert into one through-hole formed in a substrate, and to insert their leading ends into the insertion side of the substrate. The two through portions formed in parallel so as to be exposed on the surface on the opposite side to the surface of the substrate and the surface of the substrate on which the through portion is inserted is brought into contact with the through portion. A contact surface portion for determining an insertion depth, wherein the distal end portion is tapered inward as its outer surface approaches the distal end, and a return surface portion is formed on the opposite side of the outer surface from the distal end; The two penetrating portions are elastically deformed so as to approach each other and inserted into the through-hole, and then all or a part of the elastic deformation is removed and separated, and the return surface portion is inserted into the opposite side after the insertion. By facing the surface of
A self-supporting type wherein even if a force is applied to pull the through portion out of the through hole, the through portion comes into contact with the opposite surface to prevent the through portion from being pulled out of the through hole. Terminal.

According to a second aspect of the present invention, there is provided the self-standing terminal according to the first aspect, wherein the return surface portion is substantially parallel to the contact surface portion.

According to a third aspect of the present invention, there is provided the self-standing terminal according to the second aspect, wherein a distance between the return surface portion and the contact surface portion is substantially equal to a thickness of the substrate.

According to a fourth aspect of the present invention, the maximum value of the outer thread in a direction perpendicular to the through-hole among the outer threads of the two through-holes is set in a state where the elasticity of the through-hole is not present. The self-standing terminal according to any one of claims 1 to 3, wherein the terminal is larger than a maximum value of an inner diameter of the through hole in a direction perpendicular to the through hole.

According to a fifth aspect of the present invention, in the self-standing terminal according to the fourth aspect, the maximum value of the outer glue is a distance between outermost ends of the respective return surfaces. is there.

According to a sixth aspect of the present invention, the maximum value of the outer diameter in the direction perpendicular to the through-hole among the outer diameters of the two through-holes excluding the tip portion is equal to the maximum value of the outer diameter of the through-hole. The self-standing terminal according to any one of claims 1 to 5, wherein in a state where there is no elastic deformation, a maximum value of an inner diameter of the through hole in a direction perpendicular to the through hole is substantially equal.

According to a seventh aspect of the present invention, the through-hole is inserted into another through-hole formed in the substrate before the through-hole is inserted into the through-hole. The self-standing terminal according to any one of claims 1 to 6, further comprising a guide portion for guiding insertion.

According to a preferred embodiment of the present invention, the tip of the guide portion protrudes from the tip of the penetrating portion with reference to a surface formed by the contact surface portion.
The self-standing terminal described in (1).

According to a ninth aspect of the present invention, there is provided a self-standing terminal according to any one of the first to sixth aspects, wherein the through-hole is inserted into the through-hole in another through-hole opened in the substrate. A radiator comprising: a plurality of guide terminals each of which is inserted in advance to guide insertion of the through portion into the through hole.

According to a tenth aspect of the present invention, the provision of each of the plurality includes providing two each, and the two guide terminals are arranged at diagonals of a square formed by each of the terminals. The radiator according to claim 9, wherein

The present invention of claim 11 is the invention of claim 7 or 8.
A radiator comprising a plurality of the self-standing terminals described in (1).

According to a twelfth aspect of the present invention, the provision of the plurality includes providing two pieces, and the two guide parts are formed in a diagonal of a square formed by the penetrating part and the guide part. The radiator according to claim 11, wherein the radiator is arranged.

According to a thirteenth aspect of the present invention, the radiator according to any one of the ninth to twelfth aspects, wherein the self-standing terminal and / or the guide terminal and the radiator main body are integrally formed. It is.

According to a fourteenth aspect of the present invention, in the radiator according to any one of the ninth to thirteenth aspects, the self-standing terminal and / or the guide terminal also serve as a ground terminal of the radiator. is there.

[0020]

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

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 2 is an overall configuration diagram showing a configuration of a self-standing terminal according to the embodiment.

In FIG. 1, a self-standing terminal 3 is a flat terminal having a penetrating portion 4 which is a projection arranged in parallel with two, and is fixed to a lower portion of a radiator main body 1. The radiator body 1 is held on the substrate 2 in a mounted state by inserting and penetrating the through portion 4 into the provided through hole 2a. The penetrating portion 4 has an inverted U-shaped bifurcated shape, and is formed so as to be easily elastically deformed when a force is applied to close the bifurcated portion. The tip 5 of the penetrating part 4
The wedge shape is formed, and a portion corresponding to a side opposite to a tip of the wedge shape forms a return surface portion 7. On the outer side of the penetrating portion 4, a contact surface portion 6 is formed in parallel with the return surface portion 7, and the contact surface portion 6 and the return surface portion 7 facing each other are formed.
Is substantially equal to the thickness of the substrate 2.

Next, the operation of this embodiment will be described.

When the tip 5 of the self-standing terminal 3 fixed to the lower portion of the radiator body 1 is applied to the entrance of the through hole 2a formed in the substrate 2 and a force is applied in the insertion direction, the tip 5 becomes tapered. Thereby, the through portion 4 is elastically deformed so that the forked portion is closed, and is inserted into the through hole 2a. The insertion of the penetrating portion 4 stops when the contact surface 6 comes into contact with the substrate 2, and at this time, the front end portion 5 is completely exposed on the opposite surface of the substrate 2, and the return surface 7 and the contact surface 6 are joined together. The substrate 2 is sandwiched. In this way, the return surface portion 7 comes into contact with the surface on the opposite side of the substrate 2, so that even if a force is applied to pull out the through portion 4 from the through hole 2a, the return portion 7 does not come off. At this time, the outer portion of the portion inside the through hole 2a of the through portion 4 is substantially equal to the inner portion of the through hole 2a without any elastic deformation. When completely exposed to the surface, the elastic deformation is completely removed and no residual stress remains.

That is, the self-standing terminal 3 in the present embodiment is fixed to the lower portion of
By fitting, it can fall, tilt,
The radiator body 1 can be independently mounted on the substrate 2 while suppressing floating and the like, and since the tip 5 is exposed on the surface on the opposite side of the substrate 2, soldering can be performed on both surfaces of the substrate 2. It also has sufficient mounting strength after soldering.

(Second Embodiment) Next, a second embodiment of the present invention will be described.
An embodiment will be described with reference to the drawings. FIG. 2 is an overall configuration diagram showing the configuration of the self-standing terminal according to the second embodiment of the present invention. In the present embodiment, in addition to the above-described first embodiment, a guide portion of the present invention is provided.
Therefore, in the present embodiment, the same reference numerals are given to components that perform the same functions as those in the first embodiment, and description thereof will be omitted. Unless otherwise described, it is the same as the first embodiment.

In FIG. 2, a self-standing terminal 8 is a flat terminal, which is fixed to a lower portion of the radiator body 1 and a penetration portion 4 is inserted into a through hole 2a formed in the substrate 2 and is engaged therewith. Thus, the radiator body 1 is held on the substrate 2 in a mounted state. The self-standing terminal 8 has three protrusions, two of which are the through portions 4 arranged in parallel, and the other one is the guide portion 9 projecting from the through portion 4. Unlike the first embodiment, the contact surface portion 6 is formed between the penetrating portion 4 and the guide portion 9. The protrusion length of the guide portion 9 is longer than the protrusion length of the through portion 4 with reference to the surface of the contact surface portion 6. Other configurations are the same as those of the first embodiment.

Next, the operation of this embodiment will be described.
The following description focuses on the differences from the first embodiment.

The tip of the guide portion 9 of the self-standing terminal 8 fixed to the lower portion of the radiator body 1 is connected to a through hole 2b formed in the substrate 2.
The penetrating portion 4 is elastically deformed so that the bifurcated portion is closed by the taper of the distal end portion 5 when the force is applied in the inserting direction as it is when the mounting position of the radiator body 1 is determined. Then, it is inserted into the through hole 2a. Other operations are the same as those of the first embodiment.

That is, in addition to the features of the self-standing terminal 3 of the first embodiment, the self-standing terminal 8 of the present embodiment has the following features:
The penetration portion 4 can be inserted. As described in the first embodiment, since the penetrating portion 4 is formed to be easily elastically deformed, it often does not have sufficient strength. Therefore, there is a concern that plastic deformation or damage may occur unless the positioning and insertion are performed in the through hole 2a. The self-standing terminal 8 is provided with a guide portion 9 to prevent this.

(Third Embodiment) Next, a third embodiment of the present invention will be described.
An embodiment will be described with reference to the drawings. FIG. 3 is an overall configuration diagram showing a configuration of a radiator according to a third embodiment of the present invention. The present embodiment relates to the radiator provided with the self-standing terminal 3 in the first embodiment described above, and therefore, the description of the radiator described in the first embodiment will be omitted.

In FIG. 3, the radiator body 11 is of an extruded aluminum type and has an L-shape. At the lower end thereof, two self-standing terminals 3 according to the first embodiment are mounted. I have.

The operation of mounting the radiator body 11 on a substrate (not shown) independently is the same as the operation of mounting the radiator body 1 on the substrate 2 described in the first embodiment. Therefore, the description is omitted.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described.
An embodiment will be described with reference to the drawings. FIG. 4 is an overall configuration diagram showing a configuration of a radiator according to a fourth embodiment of the present invention. In the present embodiment, in addition to the radiator according to the third embodiment described above, another terminal for guiding is provided,
Since the arrangement of each terminal is specified, the description of those described in the third embodiment is omitted.

In FIG. 4, at the lower end of the radiator body 11, two self-standing terminals 3 and two flat guide terminals 10 according to the first embodiment are mounted. The guide terminal 10 has one protrusion, and the protrusion length is longer than the protrusion length of the free-standing terminal 3 with respect to the lower end of the radiator body 11. The two guide terminals 10 are arranged at diagonal corners of a square formed by the terminals 3 and 10.

Next, the operation of mounting the radiator body 11 on a substrate (not shown) by itself will be described, focusing on points different from the third embodiment.

By inserting the tips of the two guide terminals 10 fixed to the lower part of the radiator body 11 into the through holes 2b formed in the substrate 2, the mounting position of the radiator body 11 is determined. When a force is applied in the insertion direction as it is, the penetrating portion 4 becomes
The forked part is elastically deformed so as to close and is inserted into the through hole 2a. Other operations are the same as in the third embodiment.

That is, the radiator according to the present embodiment has the features of the radiator according to the third embodiment. Can be performed. As described in the first embodiment, since the penetrating portion 4 is formed to be easily elastically deformed, it often does not have sufficient strength. Therefore, there is a concern that plastic deformation or damage may occur unless the positioning and insertion are performed in the through hole 2a. In order to prevent this, a guide terminal 10 is separately provided. Also,
By arranging the guide terminals 10 at diagonal corners of the square formed by the terminals 3 and 10, the radiator body 1 is positioned after the guide terminals 10 are positioned and before the penetration portions 4 of the free-standing terminals 3 are inserted.
The displacement of the tip 5 of the free-standing terminal 3 caused by the falling of the terminal 1 is reduced.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described.
An embodiment will be described with reference to the drawings. FIG. 5 is an overall configuration diagram showing a configuration of a radiator according to a fifth embodiment of the present invention. FIG. 6 is a plan view of a lower end portion of the radiator body of FIG. The present embodiment relates to the radiator provided with the self-standing terminal 8 in the above-described second embodiment, and therefore, the description of the radiator described in the second embodiment will be omitted.

In FIG. 5, the radiator body 12 is of an extruded aluminum type and has a comb shape.
At its lower end, two self-standing terminals 8 according to the second embodiment are mounted. As shown in FIG. 6, the two self-standing terminals 8 have two guide portions 9 and two sets of through portions 4 and 2.
The radiator body 12 is mounted upside down on opposite surfaces of the radiator body 12 so as to be arranged at diagonal corners of a square formed by the individual guide portions 9.

The operation of mounting the radiator body 12 on a substrate (not shown) by itself is the same as the operation of mounting the radiator body 1 on the substrate 2 as described in the second embodiment. Therefore, the description is omitted.

That is, the radiator of the present embodiment is different from the radiator of the fourth embodiment in that the self-standing terminal 8 and the self-standing terminal 8 are replaced with the self-standing terminal 8 and the guide terminal 10.
By mounting the radiator and specifying its arrangement, in addition to the same effect as the radiator in the fourth embodiment, the number of mounting steps can be reduced due to the reduction in the number of terminals.

Although the self-standing terminal of the present invention has been described as a flat plate in the first to fifth embodiments, the present invention is not limited to this. However, it is only necessary that the relationship between the through hole of the present invention and each terminal is ensured in each cross section.

The respective terminals of the present invention correspond to the above-mentioned first to first terminals.
In the fifth embodiment, the radiator body has been described as being merely mounted on the substrate by itself, but may be also used as a ground terminal.

Further, each terminal of the present invention is connected to the first terminal described above.
In the fifth to fifth embodiments, it has been described that, after being manufactured as a single body, it is mounted on the radiator main body, but may be integrally formed with the radiator main body.

Further, the return surface portion of the present invention is provided with the above-mentioned first surface.
In the fifth to fifth embodiments, the contact surface is substantially parallel to the contact surface, and the distance between the contact surface and the contact surface is substantially equal to the thickness of the substrate. However, the present invention is not limited to this. Even if a pulling force is applied, it is only necessary to contact the surface of the substrate and prevent the through portion from being pulled out of the through hole.

Further, the penetrating portion of the present invention is provided with the first
In the fifth to fifth embodiments, the maximum value of the outer thread in the direction perpendicular to the through-hole among the outer threads of the two through-holes is equal to the maximum value of the outer thread when the through-hole is not elastically deformed. The maximum value of the outer part in the direction perpendicular to the through-hole is larger than the maximum value of the inner part in the direction perpendicular to the hole, and the outer part in the direction perpendicular to the through-hole is the maximum value of the outer part including the two through parts except the tip. In the state where there is no elastic deformation, it has been described that the through hole is substantially equal to the maximum value of the inner diameter in a direction perpendicular to the through hole.However, the present invention is not limited to this. Even when a force is applied to pull out the through-hole from the through-hole by being opposed to the surface of the substrate, the structure is in contact with the surface of the substrate to prevent the through-hole from being pulled out of the through-hole. do it.

Further, the guide portion and the guide terminal of the present invention
In the above-described first to fifth embodiments, it has been described that the projection protrudes from the tip of the penetrating portion. However, the present invention is not limited to this.
What is necessary is just to be the structure inserted before insertion of a penetration part into a penetration hole.

Further, the radiator according to the present invention has the above-described third to third aspects.
Not only the shape described in the fifth embodiment, but also the number of each terminal to be mounted is adjusted according to the shape and size of the radiator, the size of each terminal, the demand for the self-standing strength of the radiator, and the like. It may be.

[0050]

As is evident from the above description, the present invention can mount a radiator on a printed circuit board without any trouble, suppressing a fall, an inclination, a floating, etc., and a mounting strength after soldering. And a radiator using the same can be provided.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a configuration of a self-standing terminal according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram showing a configuration of a self-standing terminal according to a second embodiment of the present invention.

FIG. 3 is an overall configuration diagram showing a configuration of a radiator according to a third embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a configuration of a radiator according to a fourth embodiment of the present invention.

FIG. 5 is an overall configuration diagram showing a configuration of a radiator according to a fifth embodiment of the present invention.

FIG. 6 is a plan view of a lower end portion of the radiator body of FIG. 5;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 radiator main body 2 substrate 2 a through hole 2 b through hole 3 self-standing terminal 4 penetrating portion 5 tip 6 contact surface 7 return surface 8 self-standing terminal 9 guide portion 10 guide terminal 11 radiator main body 12 radiator main body

Claims (14)

[Claims] 1. A two-hole circuit board which is simultaneously inserted into one through-hole formed in a substrate, and is formed in parallel so that their front ends are exposed on a surface opposite to an insertion-side surface of the substrate. A penetrating portion of the book, and a contact surface portion that determines an insertion depth of the penetrating portion by contacting a surface of the substrate on a side where the penetrating portion is inserted; , A return surface portion is formed on the opposite side of the outer surface from the tip, and
The penetrating portions of the book are elastically deformed so as to approach each other and inserted into the through-hole, and then all or part of the elastic deformation is removed and separated, and the return surface portion is inserted on the opposite side after insertion. By being opposed to a surface, even if a force is applied to pull the through portion out of the through hole, the through portion contacts the opposite surface to prevent the through portion from being pulled out of the through hole. A free-standing terminal characterized by the following. 2. The self-supporting terminal according to claim 1, wherein the return surface is substantially parallel to the contact surface. 3. The self-standing terminal according to claim 2, wherein a distance between the return surface portion and the contact surface portion is substantially equal to a thickness of the substrate. 4. The maximum value of the outer thread in the direction perpendicular to the through-hole among the outer threads of the two through-holes, wherein the maximum value of the outer thread in the direction perpendicular to the through-hole is such that there is no elastic deformation of the through-hole. The self-standing terminal according to any one of claims 1 to 3, wherein the terminal is larger than a maximum value of an inner diameter in a direction perpendicular to the through hole. 5. The self-supporting terminal according to claim 4, wherein the maximum value of the outer glue is a distance between outermost ends of the respective return surface portions. 6. The maximum value of the outer thread in the direction perpendicular to the through-hole among the outer threads obtained by combining the two penetrating parts except for the tip part, in a state where the penetrating part has no elastic deformation. The self-standing terminal according to any one of claims 1 to 5, wherein a maximum value of an inner diameter of the through hole in a direction perpendicular to the through hole is substantially equal. 7. A guide for guiding the insertion of the through portion into the through hole by being inserted into another through hole formed in the substrate prior to the insertion of the through portion into the through hole. The self-standing terminal according to any one of claims 1 to 6, further comprising a portion. 8. The self-standing terminal according to claim 7, wherein a tip of the guide portion protrudes from a tip of the through portion with reference to a surface formed by the contact surface portion. 9. The self-standing terminal according to claim 1, which is inserted into another through-hole formed in the substrate prior to insertion of the through-hole into the through-hole. And a guide terminal for guiding insertion of the through portion into the through hole. 10. The provision of a plurality of each,
The radiator according to claim 9, wherein two radiators are provided, and the two guide terminals are arranged at diagonal corners of a square formed by each of the terminals. 11. A radiator comprising a plurality of the self-standing terminals according to claim 7 or 8. 12. The provision of a plurality of pieces means that two pieces are provided, and the two guide parts are arranged at a diagonal of a square formed by the penetrating part and the guide part. The radiator according to claim 11, characterized in that: 13. The radiator according to claim 9, wherein the self-standing terminal and / or the guide terminal and a radiator main body are integrally formed. 14. The radiator according to claim 9, wherein the free-standing terminal and / or the guide terminal double as a ground terminal of the radiator.