JP2006049672A - Fan fixing structure and method of assembling thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan fixing structure for reliably positioning and fixing a fan apparatus by forming a slit groove at positioning bosses formed to be larger than the diameter of positioning holes to absorb dimensional variance of the positioning holes or the positioning bosses. <P>SOLUTION: At the case 2 of the fan fixing structure, the plurality of positioning holes 6 are formed. At a holder 8, the plurality of positioning bosses 15 are erected and the positioning holes 6 can be fitted to them, and the fan apparatus 1 can be snap-engaged by a formed hook part 14. At the positioning bosses 15, an elastic fitting part 16 of a size B whose diameter is larger than the bore diameter of the positioning holes 6 of a size A is formed. At the elastic fitting part 16, the slit groove 17 of a prescribed depth and a width C is formed in the erecting direction of the positioning bosses 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a fan fixing structure, and more particularly to a fan fixing structure that can be fixed without screwing or the like.

A conventional fan fixing structure will be described based on Patent Document 1. As shown in FIG. 7, a fan device 30 includes a hollow fixing plate 31 formed in a lower portion and a fan accommodated in a hollow portion of the fixing plate 31. 32, and a plurality of support pillars 33 and a base 34, which extend upward from the fixed plate 31 and can rotatably support the internal fan 32, are formed.
In addition, positioning holes 35 are formed through the four corners of the fixed plate.

A fan seat 36 for fixing the fan device 30 is formed in a substantially U shape by an upper plate 37 and a side plate 38, and the upper plate 37 has a circular hole 39 in the center, and faces upward outside the circular hole 39. The stopper plate 40 is formed.
Further, the upper plate 37 is formed with columnar positioning bosses 41 erected at four corner portions and four hook portions 42 erected in the vicinity of the outside of the left and right positioning bosses 41 in the drawing.
The fan seat 36 having such a configuration includes a heat sink 44 housed inside a bottom seat 43 attached to a motherboard (not shown), and is attached to the bottom seat 43 so as to cover the heat sink 44.

In order to fix the fan device 30 to the fan seat 36 attached to the bottom seat 43, first, the positioning hole 35 is inserted into and fitted into the columnar positioning boss 41 of the fan seat 36. At the same time, the hook portion 42 is snap-locked to the fixing plate 31, and the fan device 30 is fixed to the fan seat 36.
Utility Model Registration No. 3095431 Japanese Utility Model Publication No. 5-83635 JP-A-8-228086

  However, in the conventional fan fixing structure as described above, since the fixing plate 31 and the fan sheet 36 of the fan device 30 are formed by molding a resin material, the diameter dimension and the pitch dimension of the positioning hole 35 and the positioning boss 41 are formed. As a result, the positioning hole 35 may not be securely fitted to the positioning boss 41. As a countermeasure, the outer diameter dimension of the positioning boss 41 can be made smaller than the hole diameter dimension of the positioning hole 35 so as to absorb each dimension variation and to be surely fitted. When the positioning hole 35 fitted to 41 is rattled and the fan 32 is driven to rotate, the fan device 30 may vibrate and noise may be generated.

  In order to solve the above-described problems, the present invention forms a dividing groove in a positioning boss formed larger than the diameter dimension of the positioning hole, and causes a variation in the dimension of the positioning hole or positioning boss. An object of the present invention is to provide a fan fixing structure that can be reliably positioned and fixed, and an assembling method thereof.

As a first means for solving the above problems, a fan fixing structure of the present invention includes a fan device in which a fan is housed in a case and a holder capable of fixing the fan device. A positioning hole is formed on the holder, and a plurality of positioning bosses are erected on the holder so that the positioning hole can be fitted, and the fan device can be snap-locked by the formed hook portion. The positioning boss has an elastic fitting portion whose outer diameter is larger than the hole size of the positioning hole, and the elastic fitting portion has a predetermined depth dimension in the standing direction of the positioning boss. A dividing groove having a width dimension is formed.
Further, as a second solving means for solving the above-mentioned problem, the positioning boss has the elastic fitting portion formed at a tip portion thereof, and a root portion standing from the holder has the elastic fitting portion. It is characterized in that it is formed to have a larger diameter than the outer diameter dimension.

Further, as a third solving means for solving the above-mentioned problem, the holder has a fan fixing portion capable of positioning and fixing the fan device, and the positioning boss is at least 2 of the fan fixing portion. It is characterized by being erected at a location.
Further, as a fourth solving means for solving the above problem, the fan device has an outer shape of the case formed in a rectangular shape, and the positioning holes are formed in the respective corner portions of the rectangular shape, The positioning bosses are formed in at least two locations of the fan fixing portion on the holder side where the positioning holes formed in the two corner portions located on one of the diagonal lines can be fitted. And

  Further, as a fifth solving means for solving the above problem, the fan structure assembling method of the present invention is such that a positioning hole formed in the fan device can be fitted to a holder that can position and fix the fan device. A positioning boss is formed upright, and an elastic fitting portion whose outer diameter is larger than the diameter of the positioning hole is formed at the tip of the positioning boss where a split groove is formed in the standing direction. When the hole is fitted to the positioning boss, the fan groove is elastically deformed in a direction in which the width dimension of the split groove is minus, and the elastic fitting portion is elastically contacted with the inner surface of the positioning hole. A hook portion formed on the holder snaps the fan device to fix the positioned fan device to the holder.

The positioning boss according to the present invention is formed with an elastic fitting portion whose outer diameter is larger than the hole size of the positioning hole, and the elastic fitting portion has a predetermined depth dimension in the standing direction of the positioning boss. Since the split groove of the width dimension is formed, even if the pitch dimension between the positioning holes or the pitch dimension between the positioning bosses varies, the elastic fitting part is elastically deformed by the split groove, and the dimension variation is reduced. Can be absorbed.
Therefore, it is possible to provide a fan fixing structure in which the fan device can be reliably positioned and fixed to the holder.
In addition, the positioning boss has an elastic fitting portion at the tip, and the root portion standing from the holder is formed with a diameter larger than the outer diameter of the elastic fitting portion. Can be reliably elastically deformed and fitted into the positioning hole.
Further, the strength of the positioning boss can be increased, and the fan device can be reliably positioned.

Further, the holder has a fan fixing portion that can position and fix the fan device, and the positioning bosses are erected at at least two locations of the fan fixing portion, so that the fan device can be positioned reliably. it can.
In addition, since the positioning bosses are formed at least at two locations on the holder-side fan fixing portion to which the positioning holes formed at the two corner portions located on one of the diagonal lines can be fitted. The fan device can be reliably positioned.

  In the fan fixing structure assembling method of the present invention, when the positioning hole is fitted to the positioning boss, it is elastically deformed in the direction in which the width dimension of the split groove is minus, and the elastic fitting portion is brought into elastic contact with the inner surface of the positioning hole. Since the fan device is positioned and the hook portion formed on the holder snaps and locks the fan device, the positioned fan device can be fixed to the holder. The fan device can be positioned and securely fixed to the holder, and is excellent in assemblability.

  Embodiments of the fan fixing structure according to the present invention will be described below with reference to FIGS. 1 is an exploded perspective view illustrating an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. 2, and FIG. FIG. 5 is a cross-sectional view of the main part of the positioning hole, FIG. 5 is a cross-sectional view of the main part of the positioning boss part according to the present invention, and FIG. 6 is a cross-sectional view of 6-6 in FIG.

First, as shown in FIG. 1, a fan device 1 is provided in a fan fixing structure of the present invention. The fan device 1 has a case 2 having a substantially rectangular outer shape, and a fan ( Houses not shown.
In the case 2, a circular cavity 4 is formed inside by a side wall 3 formed on the outer peripheral part, and a base part 5 is formed on one side of the front side of the figure. It is integrated with the side wall 3 by a crosspiece 5a extending in the direction.

The other surface side where the cavity 4 of the case 2 is formed is opened and attached so as to face a vent hole 10 of a holder 8 described later.
A fan that is pivotally supported by the base 5 is rotatable in the cavity 4.
Further, positioning holes 6 having a hole diameter A as shown in FIG. 4 are formed through the four corners of the side wall 3.
A clearance hole 7 having a diameter larger than the diameter of the positioning hole 6 having a dimension A is formed at the lower portion of the positioning hole 6 in the figure, and the portion where the positioning hole 6 is formed has a two-stage shape.

The holder 8 to which the fan device 1 can be fixed is made of a resin material and can be mounted inside a housing such as a computer. The holder 8 is formed with, for example, a horizontally long base portion 9, and a fan fixing portion 10 capable of fixing the fan device 1 is formed at a substantially central portion of the horizontally long base portion 9.
The base portion 8 of the fan fixing portion 10 is formed with a substantially oval-shaped ventilation hole 11, and guide walls 12 facing each other across the fan fixing portion 10 on the outside of the ventilation hole 11 in the left and right longitudinal directions in the figure, 13 is formed.

The guide walls 12 and 13 are respectively formed with hook-shaped hook portions 14 and 14 that can snap the fan device 1 to the holder 8.
In addition, at the base portion 9 of the substantially rectangular fan fixing portion 10, at least two locations where the positioning holes 6 formed in the two corner portions located on one of the diagonal lines of the fan device 1 can be fitted, The positioning boss 15 is erected at a predetermined height.
As shown in FIG. 5, the positioning boss 15 is formed with an elastic fitting portion 16 having a dimension B whose outer diameter is larger than the hole diameter of the dimension A of the positioning hole 6 of the fan device 1 at the tip.

Further, the elastic fitting portion 16 is formed with a split groove 17 having a predetermined depth dimension and a width dimension C in the standing direction (the vertical direction in the figure) of the positioning boss 15.
For this purpose, when the positioning hole 6 of the fan device 1 is fitted to the elastic fitting portion 16, the elastic fitting portion 16 is elastically deformed as shown in FIG. Minus and elastically contacts the inner surface of the positioning hole 6.
Therefore, the fan device 1 is positioned on the fan fixing portion 10 of the holder 8 by the positioning boss 15.
That is, in the fan fixing structure of the present invention, since the elastic fitting portion 16 is elastically deformed by the split groove 17, even if the pitch dimension between the positioning holes 6 or the pitch dimension between the positioning bosses 15 varies, The variation in dimensions can be absorbed, and the fan device 1 can be reliably positioned and fixed to the holder 8.

Further, the positioning boss 15 has a root portion 18 standing from the fan fixing portion 10 having a larger diameter than the elastic fitting portion 16 having a dimension B, and the positioning boss 15 has a two-stage shape. For this reason, the positioning boss 15 having a thick root portion is increased in strength so that the fan device 1 can be positioned reliably.
The outer diameter of the root portion 18 is smaller than the inner diameter of the escape hole 7 formed in the fan device 1.

In addition, first and second mounting legs 19 and 20 are formed on the base 9 of the holder 8, and the holder 8 that positions and fixes the fan device 1 is fixed by the first and second mounting legs 19 and 20. For example, it is attached to the housing side of an information device such as a computer (not shown).
When the inside of the housing becomes high temperature due to heat generated by the electronic device or the like housed inside the information device, the fan of the fan device 1 is driven, and the internal high temperature air and the outside cold It is designed to circulate with air. As a result, the inside of the housing is cooled to an appropriate temperature so that no abnormality occurs in the electronic device.

In the assembling method of the fan fixing structure of the present invention having such a configuration, first, when the fan device 1 is brought close to the fan fixing portion 10 in a state of facing the fan fixing portion 10 of the holder 8, the side wall 3 of the case 2 is hooked. While the portion 14 is pushed outward, the positioning hole 6 is fitted to at least two positioning bosses 15.
Then, as shown in FIG. 6, the width dimension C of the split groove 17 is elastically deformed in the minus direction to become a dimension C ′, and the elastic fitting portion 16 is elastically provided on the inner surface of the positioning hole 6.
At the same time, the hook portion 14 that the side wall 3 of the case 2 has spread outwardly snaps to the upper surface of the side wall 3 of the fan device 1.
As a result, the fan device 1 is positioned and snapped to the holder 8, and the fan device 1 is fixed to the holder 8.

In the description of the embodiment of the present invention, the positioning boss 15 is formed at least at two locations. However, the positioning boss 15 is formed at four locations corresponding to the four positioning holes 6 formed in the fan device 1. May be.
Further, although the positioning boss 15 has been described as being formed in at least two corner portions opposed to each other in the diagonal direction, it may be formed in at least two corner portions parallel to the side wall 3.
Further, although the positioning boss 15 has been described with the base portion 18 having a larger diameter than the elastic fitting portion 16, it may have the same diameter as the elastic fitting portion 16.

It is a disassembled perspective view explaining embodiment of this invention. It is a top view of FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2. It is principal part sectional drawing of the positioning hole concerning this invention. It is principal part sectional drawing of the positioning boss | hub part concerning this invention. FIG. 6 is a sectional view taken along line 6-6 in FIG. It is a disassembled perspective view explaining the conventional fan fixing structure.

Explanation of symbols

1 Fan device 2 Case
DESCRIPTION OF SYMBOLS 3 Side wall 4 Cavity part 5 Base part 5a Crosspiece 6 Positioning hole 7 Escape hole 8 Holder 9 Base part 10 Fan fixing part 11 Ventilation hole 12, 13 Guide wall 14 Hook part 15 Positioning boss 16 Elastic fitting part 17 Split groove 18 Base part

Claims (5)

  A fan device containing a fan inside the case and a holder capable of fixing the fan device are provided. The case has a plurality of positioning holes, and the holder has a plurality of positioning bosses erected. The positioning hole can be fitted, and the fan device can be snap-locked by the formed hook portion. The positioning boss has an elastic outer diameter larger than the hole diameter of the positioning hole. A fan fixing structure, wherein a fitting portion is formed, and a split groove having a predetermined depth and width is formed in the elastic fitting portion in a standing direction of the positioning boss.   The positioning boss is characterized in that the elastic fitting portion is formed at a tip portion, and a root portion standing from the holder is formed with a diameter larger than an outer diameter size of the elastic fitting portion. The fan fixing structure according to claim 1.   The said holder has a fan fixing | fixed part which can position and fix the said fan apparatus, The said positioning boss is standingly arranged in at least 2 places of the said fan fixing | fixed part, Or the fan fixing structure of 2.   In the fan device, the outer shape of the case is formed in a rectangular shape, the positioning holes are formed in the respective corner portions of the rectangular shape, and the positioning bosses are located at two diagonal lines. The fan fixing structure according to claim 3, wherein the positioning hole formed in the corner portion is formed in at least two places of the fan fixing portion on the holder side where the holder can be fitted. The holder that can position and fix the fan device is provided with a positioning boss that can be fitted with a positioning hole formed in the fan device, and the positioning boss has a tip formed with a split groove in the standing direction. An elastic fitting portion having an outer diameter larger than the hole diameter of the positioning hole is formed in the portion, and when the positioning hole is fitted to the positioning boss, the width of the split groove is elastically deformed in a minus direction. The elastic fitting portion elastically contacts the inner surface of the positioning hole to position the fan device, and a hook portion formed on the holder snaps the fan device to position the fan device. A method for assembling a fan fixing structure, wherein the fan fixing structure can be fixed to the holder.

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