JP2508772Y2 - Conduction cooling board fixed shelf structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduction cooling type board fixing shelf structure in which a large number of printed circuit boards used for electronic devices and the like are fixed in parallel in a shelf and the printed circuit boards are accommodated in a conductive cooling manner. Is.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional shelf structure of this type, and shows a main structure of a portion to which a printed circuit board is fixed. In the figure, reference numeral 1 denotes a conductive block forming the bottom surface of a shelf, and in this conductive block 1, substantially fixed fixing grooves 3 for fixing the printed circuit board 2 at fixed intervals are provided. It is formed to extend in the attachment / detachment direction.

Reference numeral 4 denotes two groove portions formed at both ends of the bottom portion of the fixed groove 3 for fitting and supporting the lower side portions of the respective printed circuit boards 2 and also along the fixed groove 3 to the printed circuit board. It is formed to extend in the attachment / detachment direction 2. Therefore, as shown in FIG. 6 , the lower portion of the printed circuit board 2 fitted in the groove portion 4 is brought into contact with both side surfaces of the fixed groove 3 formed so as to face each other, and the printed circuit board 2 is pressure-contacted by a structure described later. By doing so, the printed circuit board 2 made of a material having a good thermal conductivity is cooled via the conductive block 1 and can be detachably fixed.

Next, a structure for pressing the printed circuit board 2 to both side surfaces of the fixing groove 3 will be described. Reference numeral 5 denotes a pair of metal fittings fixed inside the fixing groove 3 corresponding to the extending direction of the fixing groove 3, and the respective facing surfaces of the metal fittings 5 gradually expand upward. The tapered surface 6 is inclined toward the printed circuit board 2 and each has a trapezoidal cross section.

A pressing block 7 is inserted between the pair of metal fittings 5 and fixed to the conduction block 1. The pressing block 7 has an inverted trapezoidal shape as shown in the figure. In other words, both side surfaces of the pressing block 7 are tapered surfaces 8 that are inclined so as to narrow downward so as to face and contact the respective tapered surfaces 6 of the metal fitting 5, and the lower surface side is fixed. It is arranged so as to face the bottom surface of the groove 3.

Reference numeral 9 is a set screw for fixing the pressing block 7 to the conduction block 1, which is screwed from the lower surface side of the conduction block 1 to tighten the pressing block 7. The operation of the conventional example will be described below. First, when the setscrew 9 is tightened from the lower surface side of the conduction block 1, the pressing block 7 inserted between the fittings 5 in the fixing groove 3 becomes
It moves downward along the bottom surface of the fixed groove 3, that is, along the tapered surface 6 of the fitting 5. As a result, the hour metal fitting 5 is expanded in the direction of the arrow in the figure by the tapered surfaces 8 on both sides of the pressing block 7, and is pressed against the printed circuit boards 2 on both sides.

As a result, each printed circuit board 2 is pressed by the metal fitting 5 and fixed in a state of being pressed against both side surfaces of the fixing groove 3. Therefore,
To cool the printed circuit board 2 which has become hot due to heat generated from an electronic component (not shown) mounted on the printed circuit board 2, the printed circuit board 2 is pressed onto the cooled conductive block 1 to bring the printed circuit board 2 into contact with the conductive block 1. The heat was conducted to the outside of the shelf to dissipate it.

[0008]

However, the structure of the conventional shelf described above has the following problems when the printed circuit board 2 is attached to and detached from the shelf. Figure 7
FIG. 3 is a perspective view showing a conventional shelf structure model for showing conventional problems, in which an attaching / detaching direction of the printed circuit board 2 to / from the shelf is indicated by an arrow a, a fastening direction of a set screw 9 is indicated by an arrow b, and a pressing block 7 is attached. The moving direction of is indicated by arrow c.

As described above, in the conventional structure, when the printed circuit board 2 is to be attached or detached, it is necessary to fasten or loosen the set screw 9 from the lower surface side of the shelf. For this reason, the attachment / detachment operation of the printed circuit board at the time of maintenance such as repair work and periodic inspection has to operate the set screw 9 on the lower surface side every time, which is a troublesome work. There was a problem that it was necessary to secure a space for doing.

Further, if the set screw 9 is at one position,
Since it is not enough to fasten the pressing block 7, that is, it cannot be said that the printed circuit board 2 is fixed sufficiently, it is necessary to provide the set screws 9 at several places, and the maintenance work becomes more troublesome, and the workability is improved. There was a problem of lowering the. The present invention has been made to solve the above-mentioned problems, and facilitates troublesome maintenance work by tightening and loosening the setscrew, and at the same time effectively using the space. An object of the present invention is to provide a conduction-cooled substrate shelf structure having improved properties.

[0011]

In order to achieve the above-mentioned object, according to the present invention, the bottom surface and the ceiling surface of a box-shaped shelf whose front side is an opening surface are formed by a conductive block having heat conductivity. Providing a plurality of fixing grooves for fixing the printed circuit board to the conductive block at positions facing each other,
A plurality of printed circuit boards are accommodated in parallel by inserting the printed circuit boards from the opening side of the shelf so as to be in contact with the side surfaces of the respective fixed grooves, and the printed circuit boards are brought into close contact with the side surfaces of the fixed grooves. In the conduction cooling type board fixing shelf structure, in which the printed circuit board is cooled by pressing the conductive block to conduct the heat generation of the printed circuit board and dissipate the heat to the outside of the shelf, the structure has screw holes
Includes a protrusion at one end and the other end forms a fixture that includes a slit having a predetermined length, the engaging body having a through hole facing the screw holes of the fixture before Symbol slit Engage the fixture so that it moves along the
Insert the threaded part of the long screw passed through the through hole into the threaded hole of the protrusion.
It is screwed together and is sandwiched between the protrusion and the engaging body.
Install leaf springs on both sides of the long screw so that
The assembled assembly is placed in the fixed groove of the conductive block.

[0012] Then, the engaging body by rotation of the long screw by moving to the protruding portion along the slit
Wherein both leaf springs flexed flop <br/> print substrate side in both outer press by the engaging body, and the printed boards in the two leaf springs so as to press on both sides of the fixing groove of the conductive block It is a thing.

[0013]

According to the above-mentioned structure, the opening surface side of the shelf is
Tighten or loosen the long screws placed to engage
A leaf spring that moves the body and presses both printed circuit boards
Since it can be flexed and released,
The printed circuit board is attached to the side of the fixing groove by a leaf spring.
The leaf spring is released, or
It becomes very easy to attach and detach. Therefore, as in the conventional example
Also, when attaching or detaching the printed circuit board during maintenance,
Of the shelf to press the printed circuit board against the conductive block.
Tighten or loosen the set screw from the bottom side
Since it is not necessary to perform work such as
It will be easy.

Moreover, conventionally, this set screw has been operated.
Therefore, it was necessary to secure a predetermined space,
In this embodiment, the set screw itself is unnecessary, so
It is no longer necessary to secure a pace, which saves space.
Can be As a result, effective use of space is possible.
And an excellent conduction-cooled substrate shell with improved workability
A structure can be provided.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of an essential part showing the shelf structure of the present embodiment, FIG. 2 is a sectional view of the essential part showing the assembled state of FIG. 1, FIG. 1 (A) is a front view, and FIG. It is a cross section. 3 is an overall perspective view of a shelf having the structure of this embodiment.

1 to 3, 10 is a shelf 11
Is a conductive block that constitutes the bottom surface and the ceiling surface of the
Recessed fixing grooves 12 for fixing the printed circuit boards 2 are provided on the inner surfaces facing each other at regular intervals as in the conventional case. The conductive block 10 is formed of a material having good thermal conductivity, and conducts heat generated from a printed circuit board (not shown) to radiate the heat to the outside of the shelf to cool the inside of the shelf. .

Reference numeral 13 denotes a fixing tool which fits in the fixing groove 12, and the fixing tool 13 is formed in such a shape that it fits in the groove width of the fixing groove 12 and covers almost the entire bottom surface thereof. , A protrusion 13 having at one end thereof a leaf spring, which will be described later, and long holes 14a and 14b for engaging a long screw and a screw hole 15
a and a U-shaped slit 16 at the other end. The length of the slit 16 is longer than the length l of the engagement body described later.

The fixture 13 is fixed to the conduction block 10 by screwing a screw 19 into a screw hole 18 formed in a positional relationship corresponding to the screw hole 17 formed in the bottom surface of the fixing groove 12. It is supposed to do. Reference numeral 20 denotes a leaf spring fixed to the fixture 13 by fitting one end of each of the elongated holes 14a and 14b formed at one end of the fixture 13, which is made of a springy material, Both ends have a fixture and a protrusion 20a for fitting with an engagement body described later, and the printed board is bent in the X direction in the figure by the operation of the engagement body described later to move the printed circuit board to the fixing groove 12 of the conduction block 10. It is designed to be pressed against both sides.

Reference numeral 21 denotes an engaging body which is fixed by engaging with the slit 16 side of the fixing tool 13. The engaging body 21 has a neck portion 22 which engages with the slit 16 and engages with the slit 16. Elongated holes 21a and 21b for fitting the other protrusion 20a of the leaf spring 20 on the surface of the other end of the fixture 13 facing the protrusion 13a when the two are fitted together in substantially the same arrangement as the protrusion 13a. Further, it has a through hole 23 for penetrating a long screw described later. .

Reference numeral 24 is a long screw, and this long screw 24 has a threaded portion at one end, and the through hole 23 of the engaging body 21 is provided.
The engaging body 21 is fixed to the fixing tool 13 via the leaf spring 20 by inserting it further and fastening the screw portion to the screw hole 15 formed in the protrusion portion 13a on the other end side. Reference numeral 25 is a nut that is screwed into the threaded portion of the long screw 24 screwed into the screw hole 15.

With the above structure, first, the printed circuit board 2
Assembling of the fixture 13 that serves as a fixing component for fixing the (1) the protrusion 20a of the leaf spring 20 in the elongated holes 14a and 14b formed in the protrusion 13a at one end of the fixture 13 respectively.
Mating. (2) The neck portion 22 of the engaging body 21 is fitted into the slit 16 of the fixture 13 so as to be inserted and engaged, and the engaging body 2
The protrusion 20a on the other end side of the leaf spring 20 is inserted and fitted into the one elongated hole 21a, 21b.

(3) Next, from the side of the engaging body 21 where the long screw 24 is engaged with the fixture 13, the through hole 2 of the engaging body 21 is inserted.
Inserted from No. 3, penetrated as it is, passed between the leaf springs 20, inserted into the screw hole 15 of the protrusion 13a at the other end, and screwed into the screw hole 15. (4) As a result, the engaging body 21 in which the neck portion 22 is engaged with the slit 16 is moved inward along the slit 16, whereby the engaging body 21 and the projection 13
Since the leaf spring 20 supported between a and the a begins to bend outward, the tightening of the long screw 24 is stopped at the position where the deflection begins.

(5) At this point, the tip of the long screw 24 projects from the protrusion 13a of the fixture 13, so if the two nuts 25 are tightened at the tip so as not to loosen for position fixing, the printed board The fixture 13 for fixing 2 becomes an assembly. Next, the printed circuit board 2 is transferred to the conductive block 10 together with the fixture 13 thus assembled.
(6) The fixing tool 13 which is the above-mentioned assembly is arranged in the fixing groove 12 of the conductive block 10 so that the screw holes 17 and 18 are aligned with each other, and the set screw 19 is provided on the fixing tool 13 side. The fixing tool 13 is fixed to the conductive block 10 by inserting it from above and screwing it.

(7) As a result, concave grooves on which the printed circuit board 2 can be mounted are formed on both sides of the fixed groove 12, so that the printed circuit board 2 to be mounted is inserted along the fixed groove 12. To do. Next, the operation for bringing the printed circuit board 2 into close contact with the conductive block 10 and the removing operation will be described in order based on the operation explanatory diagram of FIG.

(8) Tighten the long screw 24 in the direction of arrow d. (A in FIG. 4) (9) Therefore, since the engaging body 21 moves in the direction of the protrusion 13a along the slit 16, the leaf spring 20 fitted between the protrusion 13a and the engaging body 21 is compressed, Arrow Y in the figure
The printed circuit boards 2 mounted on both sides are pressed toward the conductive block 10 side. (B in FIG. 4) When the printed circuit board 2 fixed to the conductive block 10 in a close contact state is removed, (10) the long screw 24 is turned in the direction opposite to the arrow d direction until it stops. This is because the nut 25 is the protrusion 1 of the fixture 13.
The figure shows the time when it abuts on the back surface side of 3a, and the long screw 24 cannot be further rotated unless the nut 25 is supported.

(11) By the rotation of the long screw 24, the engaging body 21 returns to the original position along the slit 16. (12) As a result, the compression of the leaf spring 20 is released, and the leaf spring 20 that has been deformed in the direction of the printed circuit board 2 disappears. As a result, the printed circuit board 2 can be inserted and removed.

In this way, the printed circuit board 2 is brought into close contact with the conductive block 10, so that heat is conducted to the conductive block 10 and released to the outside of the shelf 11. The invention of the present application is not limited to the above-described embodiment, and for example, FIG.
It is also possible to have a structure as shown in FIG.

FIG . 5 is a structural view of the essential parts showing another embodiment of the present invention.
In this embodiment, the protrusion 13a of the fixture 13 and the engaging body 21 are
Of the intermediate engaging body by adding an intermediate engaging body to the intermediate position of
A long screw 24 is passed through the through hole, and one end of the long screw 24
a to the elongated holes 14a and 14b, the other end of which is the same as the intermediate engaging body.
And a leaf spring that fits in a long hole, and one end of the intermediate engaging body.
The other end of the long hole is fitted into the long holes 21a and 21b of the engaging body 21.
The mating leaf springs 20 are arranged on both sides of the long screw 24, respectively.
The printed circuit board 2 is pressed against the conductive block 10 at a plurality of positions so as to be in close contact with the assembled product. can do.

[0029]

[0030]

As described above, according to the present invention , the bottom surface and the ceiling surface of the box-shaped shelf having the front side as the opening surface are formed by the conductive blocks having heat conductivity, and are opposed to each other. A plurality of fixing grooves for fixing the printed circuit boards are provided at the positions where the plurality of printed circuit boards are arranged in parallel by inserting the printed circuit boards from the opening side of the shelf so as to be in contact with the side surface of each fixing groove. And the printed circuit board is pressed into contact with the side surface of the fixing groove so as to conduct heat generated by the printed circuit board to the conductive block and dissipate the heat to the outside of the shelf. in the substrate fixed shelf structure, provided at one end a protrusion having a threaded hole, and the other end forms a fixture that includes a slit having a predetermined length, the And engaged with the fixture so move along the front Symbol slit engaging body having a through hole for screw holes facing the Teigu, long screws through the through holes of the engaging body
While screwing the screw part into the screw hole of the protrusion,
The leaf spring is inserted so that it is sandwiched between the protrusion and the engaging body.
The assembly formed by the plate spring provided on both sides of the long screw positioned in the fixing groove of the conductive block, moving the <br/> the engaging body by rotation of said long screw into the protruding portion along the slit Push both leaf springs with the engaging body to
To pressure deflected Some board side, both pre <br/> cement substrate at the both leaf springs on both sides of the fixing groove of the conductive block to
It has a structure.

Therefore, by tightening or loosening the long screw arranged on the opening side of the shelf, the plate spring holding the printed circuit board by moving the engaging member is bent or released. The printed circuit board can be attached to the side surface of the fixing groove by a leaf spring,
Alternatively, since the flexure of the leaf spring is released, the attachment / detachment work becomes very easy.

Therefore, as in the conventional example, when the printed circuit board is attached or detached during maintenance, work such as tightening or loosening a set screw from the lower surface side of the shelf for pressing the printed circuit board against the conductive block is performed. Since the operation does not have to be performed, the attachment / detachment operation becomes easy. Moreover, conventionally, it was necessary to secure a predetermined space in order to operate the set screw, but in the present embodiment, the set screw itself is not required, so that it is not necessary to secure the space either. Can be realized.
As a result, it is possible to provide an excellent conduction-cooled substrate shelf structure in which space can be effectively used and workability is improved. Also, in the present invention, the plate is rotated by rotating the long screw.
You can change the amount of spring deflection, which
Since the pressing force on the substrate can be changed,
Adhesion of printed circuit board to conductive block with optimum pressure
It is possible to obtain the effect of being able to
The two printed circuit boards at the same time with the conductive block.
Since it can be done, it is said that it is also excellent in operability in this respect.
The effect is obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing a shelf structure of the present embodiment.

FIG. 2 is a sectional view of an essential part showing a state where FIG. 1 is assembled.

FIG. 3 is an overall perspective view of a shelf having the structure of this embodiment.

FIG. 4 is an operation explanatory diagram of the present embodiment.

FIG. 5 is a main part structural view showing another embodiment.

FIG. 6 is a perspective view of a main part showing an example of a conventional shelf structure.
FIG.

FIG. 7 is a shelf structure model for showing the problems of the conventional example .
FIG.

[Explanation of symbols]

 2 Printed Circuit Board 10 Conductive Block 11 Shelf 12 Fixing Groove 13 Fixing Tool 13a Projection 15 Screw Hole 16 Slit 20 Leaf Spring 21 Engaging Body 22 Neck 23 Through Hole 24 Long Screw

Claims (3)

(57) [Scope of utility model registration request] 1. A bottom surface and a ceiling surface of a box-shaped shelf whose front surface is an opening surface are formed by a conductive block having thermal conductivity, and a printed circuit board is fixed to the conductive block at a position facing each other. Multiple fixing grooves are provided,
A plurality of printed circuit boards are accommodated in parallel by inserting the printed circuit boards from the opening side of the shelf so as to be in contact with the side surfaces of the respective fixed grooves, and the printed circuit boards are brought into close contact with the side surfaces of the fixed grooves. In the conduction cooling type board fixed shelf structure for cooling the printed circuit board by conducting heat generation of the printed circuit board to the conductive block and dissipating the heat to the outside of the shelf in such a manner that the projecting portion having a screw hole is provided at one end , and the other end forms a fixture that includes a slit having a predetermined length, moving along the engaging body having a through hole for screw holes facing the fixture before <br/> Symbol slit Engage the fixture as you
The threaded portion of the long screw passed through the through hole of this engaging body.
While screwing into the screw hole of the protrusion, the protrusion and the
Set the leaf springs on both sides of the long screw so that they are sandwiched between the engaging bodies.
An assembly consisting of a leaf spring is placed in the fixing groove of the conductive block, and the engaging body is moved along the slit by rotating the long screw.
By moving the leaf springs to the protrusion side,
It flexed printed circuit board side in both outer press by coalescence, wherein the conductive cooled substrate fixed shelf structure, characterized in pressure contact to Turkey on both sides of the fixing groove of the conductive block to the printed boards on both leaf springs. 2. The conduction cooling type substrate fixing shelf structure according to claim 1, wherein two leaf springs are provided on both sides of the long screw, and one end of each leaf spring is fitted to a protrusion of a fixture. A conduction-cooled substrate fixing shelf structure characterized in that the other end of the leaf spring is fitted into an engaging body. 3. The conduction cooling type substrate fixing shelf structure according to claim 1, wherein an intermediate engaging body having a through hole through which a long screw passes is provided between the protruding portion of the fixture and the engaging body, and the protruding portion, There are four leaf springs provided on both sides of the long screw,
One of the two leaf springs fits into the protrusion of the fixture and the other end fits into the intermediate engaging body, and the other two leaf springs fit one end into the intermediate engaging body. A conduction cooling type substrate fixing shelf structure characterized in that the other end is fitted to an engaging body while being fitted together.