JP2008082250A - Fan mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fan mounting structure capable of preventing deformation of a casing by adjusting force acting on the casing of a fan and preventing noise such as whining sound due to deformation from generating from the fan. <P>SOLUTION: When a rotary blade is stored in the casing 50 having through holes 52b, 52d formed in one of diagonal directions and the casing 50 is attached to a mounting pedestal 70 by fastening machine screws 55b, 55d inserted in the through holes 52b, 52d, compressible first vibration isolation materials 73b, 73d are arranged on that diagonal positions and second vibration isolation materials 73a, 73c having thickness determined according to thickness of the first vibration isolation materials 73b, 73d compressed by fastening the machine screws 55b, 55d on another diagonal positions. Consequently, force acting on the casing 50 is adjusted to prevent deformation of the casing 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fan mounting structure for mounting a fan, in which a rotor blade is accommodated in a casing having a through-hole formed in one diagonal position, to a mounting body.

  In recent years, various display devices have been put into practical use. A liquid crystal display device, which is a type of display device, is characterized by its small size, thinness, and low power consumption. In recent years, the display quality has been improved, replacing the conventional CRT. It is becoming popular as a display. Unlike a self-luminous device such as a PDP or SED, a liquid crystal display device needs to have a backlight device as a light source on the back surface of the liquid crystal panel.

  In a large-screen liquid crystal display device, since a backlight device using an arc tube as a light source is used, in addition to heat generation by the power supply circuit and the drive circuit, generation of heat by this backlight device can be ignored. Can not. Liquid crystal has an operating temperature. For example, TN liquid crystal loses its characteristics as a liquid crystal when the temperature called the NI point is exceeded. Therefore, it is necessary to provide a cooling fan to dissipate the heat generated in the display device. There is.

  There are various methods for mounting the fan. For example, as a highly versatile mounting method, Patent Document 1 discloses (1) fitting the positioning boss of the mounting portion into the mounting hole of the casing, and (2) A configuration is disclosed in which a positioning boss of a fixing bar is fitted into the mounting hole of the casing, and (3) a fixing screw is tightened to connect and fix the fixing bar to the mounting portion.

By the way, since the fan mounting structure determines the vibration of the casing, it is very important to study the fan mounting structure. For example, when attaching a fan in which rotor blades are housed in a casing having through holes formed in four corners to a mounting body, a vibration isolating material is attached to a position corresponding to the through hole, and all of the through holes are inserted through the vibration isolating material. If the screws are fixed so that an equal fastening force is applied to them, the vibration isolators are evenly compressed, and the vibration of the rotor blades can be absorbed by the compression.
JP-A-6-97687

  By the way, from the viewpoint of manufacturing, it is preferable to assemble with fewer members and simple work, so that through holes arranged at least on one diagonal are not attached to the attachment body without using all of the four through holes. It is preferable to use for fixing. However, when mounting the fan to the mounting body using diagonally arranged through-holes, the anti-vibration material of the fixed part by the screw is compressed, but the anti-vibration material of the non-fixed part not fixed by the screw is sufficiently compressed Not. Therefore, there is a problem in that a difference occurs in the distance from the surface of the attachment body between the fixed portion and the non-fixed portion of the casing, thereby inducing the torsional deformation of the casing. Further, when the casing is deformed, the rotating shaft of the rotor blade is decentered, and there is a possibility that noise such as a roaring sound is generated from the fan.

  The present invention has been made in view of such circumstances, and adjusts the force acting on the casing of the fan to prevent the casing from being deformed and to prevent the fan from generating noise such as a roaring sound due to the deformation. The purpose is to provide a fan mounting structure that can be used.

  The fan mounting structure according to the present invention is a fan mounting structure in which a fan in which a rotor blade is housed in a casing having a through hole formed in one diagonal position is mounted on a mounting body by tightening a screw inserted into the through hole. The first anti-vibration material that can be compressed is disposed at the one diagonal position, and the second anti-vibration material having a thickness corresponding to the thickness of the first anti-vibration material compressed by tightening the screw is the other diagonal. It is arranged at a position.

  In the present invention, the rotating blades constituting the fan are accommodated in a casing having a through hole formed in one diagonal position, and the fan is attached to the mounting body by tightening the screw inserted into the through hole. . A compressible first anti-vibration material is disposed at one diagonal position, and a second anti-vibration material having a thickness corresponding to the thickness of the first anti-vibration material compressed by tightening the screw is disposed at the other diagonal position. Deploy. Thereby, it becomes possible to adjust the force which acts on a casing and to prevent a deformation | transformation of a casing.

  In the fan mounting structure according to the present invention, a recess is formed in the mounting body at the position where the second vibration isolator is disposed, and the depth of the recess depends on the thickness of the second vibration isolator. It is characterized in that the value is obtained by subtracting the thickness of the vibration material when compressed.

  In the present invention, a concave portion whose depth is a value obtained by subtracting the thickness at the time of compression of the first vibration isolating material from the thickness of the second vibration isolating material at the arrangement position of the second vibration isolating material of the mounting body. Form. As a result, by tightening the screw, the first vibration isolator is compressed and its thickness changes, and in synchronism with this, the second vibration isolator approaches the surface of the mounting body and contacts the surface. If the tightening is finished, the thickness of the first vibration isolator is thinner after the fan is attached to the mounting body (after the screw is tightened) than before the fan is attached. The thickness of can be equal to that before installation. Therefore, the compression restoring force of the first vibration isolator acts on the casing, and this restoring force acts at one diagonal position, and the direction of the force is perpendicular to the mounting surface. At the position where the vibration isolator is disposed, the casing and the second anti-vibration material are in a positional relationship such that the second anti-vibration material does not act on the casing when in an equilibrium state. . As a result, the casing is not deformed and bent, and accompanying this, it is possible to prevent noise such as a roaring sound from being generated from the fan.

  In the fan mounting structure according to the present invention, a convex portion is formed at an arrangement position of the first vibration isolator of the mounting body, and the height of the convex portion is determined from the thickness of the second vibration isolator. It is characterized in that a value obtained by subtracting the thickness at the time of compression of one vibration isolator is obtained.

  In the present invention, the convex portion whose height is a value obtained by subtracting the thickness of the first anti-vibration material from the thickness of the second anti-vibration material at the arrangement position of the first anti-vibration material of the mounting body. Form. As a result, by tightening the screw, the first vibration isolator is compressed and its thickness changes, and in synchronism with this, the second vibration isolator approaches the surface of the mounting body and contacts the surface. If the tightening is finished, the thickness of the first vibration isolator is thinner after the fan is attached to the mounting body (after the screw is tightened) than before the fan is attached. The thickness of can be equal to that before installation. Therefore, the compression restoring force of the first vibration isolator acts on the casing, and this restoring force acts at one diagonal position, and the direction of the force is perpendicular to the mounting surface. At the position where the vibration isolator is disposed, the casing and the second anti-vibration material are in a positional relationship such that the second anti-vibration material does not act on the casing when in an equilibrium state. . As a result, the casing is not deformed and bent, and accompanying this, it is possible to prevent noise such as a roaring sound from being generated from the fan.

  The fan mounting structure according to the present invention is characterized in that the first vibration isolation material and the second vibration isolation material are made of the same material and thickness.

  In the present invention, by setting the first vibration isolator and the second anti-vibration material to the same material and thickness, the same anti-vibration material can be attached to all of the through holes provided in the casing. It is useful from the viewpoint of work process and cost. In particular, even if the first vibration isolating material and the second vibration isolating material are misapplied, no problem occurs.

  In the fan mounting structure according to the present invention, the surface of the mounting body is flat, and the thickness of the second vibration isolator is made to coincide with the thickness of the first vibration isolator when compressed. Features.

  In the present invention, the surface of the mounting body is made flat so that the thickness of the second vibration isolator coincides with the thickness of the first vibration isolator when compressed. Thereby, although the 1st vibration isolator and the 2nd vibration isolator cannot be made into the same material and thickness, it becomes unnecessary to provide a recessed part or a convex part in an attachment body. Thereby, the processing cost of an attachment body can be made cheap.

  In the fan mounting structure according to the present invention, a through hole is formed at the other diagonal position, and a positioning portion for aligning the casing with the casing by being inserted into the through hole is provided in the mounting body. It is formed or arranged.

  In the present invention, a through hole is provided at the other diagonal position, and the alignment portion for aligning the position with the casing is formed or arranged on the attachment body by being inserted into the through hole. Thereby, even when the hole length of one through-hole is long, first, by aligning the casing and the attachment body by this alignment portion, without aligning the position of the casing and the through-hole, The screw can be easily inserted into the through hole.

  According to the present invention, the rotor blades constituting the fan are accommodated in a casing in which a through hole is formed at one diagonal position, and when the fan is attached to the mounting body by tightening a screw inserted into the through hole, A compressible first anti-vibration material is disposed at one diagonal position, and a second anti-vibration material having a thickness corresponding to the thickness of the first anti-vibration material compressed by tightening the screw is disposed at the other diagonal position. Since the arrangement structure is adopted, it is possible to adjust the force acting on the casing to prevent the casing from being deformed. As a result, the casing is not deformed and bent, and accompanying this, it is possible to prevent noise such as a roaring sound from being generated from the fan.

  According to the present invention, since the first vibration isolating material and the second vibration isolating material have the same material and thickness, the same vibration isolating material can be attached to all the through holes provided in the casing. It is useful from the viewpoint of work process and cost. In particular, even if the first vibration isolating material and the second vibration isolating material are misapplied, no problem occurs.

  According to the present invention, a through-hole is provided at the other diagonal position, and by inserting into this through-hole, an alignment portion for aligning the position with the casing is formed or arranged on the mounting body. Even if the length of one through-hole is long, first, the positioning of the casing and the mounting body is performed by this alignment portion, so that the screw can be easily aligned without aligning the screw and the through-hole. Can be inserted into the through hole.

  Accordingly, by applying the fan mounting structure of the present invention to the display device, it is possible to prevent the fan from generating noises such as a roaring sound due to the deformation of the casing. There is no noise mixed with the voice according to the above, and the product value can be improved.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.

(Embodiment 1)
The fan mounting structure according to the present invention is applied to various electric devices such as a display device, and is used for releasing heat generated in the device or taking outside air into the device. It is a structure attached to a mounting body. FIG. 1 is a perspective view showing a display device to which a fan mounting structure according to the present invention is applied, and shows a state in which a cabinet is removed so that the features of the present invention can be understood.

  The display device according to the present invention includes a liquid crystal panel 1 and a backlight device 2 provided on the back side of the liquid crystal panel 1, and the liquid crystal panel 1 and the backlight device 2 are formed by a front cabinet and a back cabinet. Is placed inside. A plate material 3 such as an aluminum alloy is disposed on the back surface of the backlight device 2, and a boomerang-like stand 4 is attached to the lower center of the plate material 3. The stand 4 is made of a high-strength metal so that the weight of the display device can be supported.

  A control unit 31, a tuner unit 32, a liquid crystal drive unit 33, a first lighting circuit unit 34 a, a second lighting circuit unit 34 b, and a power supply unit 35 are disposed on the plate member 3. The positions of these various units are determined in consideration of the weight balance when the display device is set up.

  The power supply unit 35 is provided with a transformer circuit that converts the voltage of the power supplied by the power cable, transforms the voltage necessary for various units, and supplies the voltage to the various units. Since the power supply unit 35 functions as a heat source, the fan 5 is disposed in the power supply unit 35. Although not shown, a mesh-shaped opening is provided in the rear cabinet corresponding to the position where the fan 5 is arranged to efficiently dissipate the heat generated by the power supply unit 35.

  FIG. 2 is an exploded perspective view showing the fan mounting structure according to Embodiment 1 of the present invention, and FIG. 3 is a cross-sectional view showing the fan mounting structure according to Embodiment 1 of the present invention. 3 corresponds to a cross section taken along line III-III in FIG.

  The fan 5 is configured such that a rotor blade is accommodated in a casing 50 having a substantially rectangular parallelepiped shape, and exhaust or intake air is performed through an opening 51 provided in the casing 50 by rotating the rotor blade.

  Through holes 52 a, 52 b, 52 c, 52 d are formed at the four corners of the casing 50. In addition, at the four corners of the mounting base 70, spiral holes 71a, 71b, 71c, 71d corresponding to the respective through holes are formed. Of the spiral holes 71a, 71b, 71c, 71d, the positions of the spiral holes 71a, 71c provided at one diagonal position form recesses 72a, 72c.

  Screws 55 a and 55 c are screwed into the spiral holes 71 a and 71 c from the back side of the mounting base 70. Then, donut-shaped second vibration isolating materials (for example, vibration isolating rubber) 73a and 73c are inserted into the rotation shafts of the screws 55a and 55c, and are temporarily fixed to the bottom surfaces of the recesses 72a and 72c with a double-sided tape or the like. The rotating shafts of the screws 55 a and 55 c are fitted into the through holes 52 a and 52 c provided in the casing 50, and the position where the casing 50 is arranged on the mounting base 70 is matched. That is, the screws 55a and 55c function as an alignment unit for aligning the position with the casing 50. Therefore, as shown in FIGS. 2 and 3, the rotation shafts of the screws 55a and 55c do not need to have a length penetrating the through holes 52a and 52c.

  On the other hand, screws 55b and 55d are screwed into the spiral holes 71b and 71d from the surface side of the mounting base 70 through through holes 52b and 52d provided in the casing 50. As described above, donut-shaped compressible first anti-vibration materials (for example, anti-vibration rubber) 73b and 73d are inserted between the mounting base 70 and the casing 50 on the rotating shafts of the screws 55b and 55d. Even if the length of the through hole is long, first, the through holes 52a and 52c are fitted to the screws 55a and 55c so that the screws 55b and 55d are aligned with the spiral holes 71b and 71d. The screws 55b and 55d can be easily inserted and screwed into the spiral holes 71b and 71d without any problems.

  In this manner, the casing 50 and the mounting base 70 are aligned with the screws 55a and 55c, and the casing 50 is attached to the mounting base 70 by tightening the screws 55b and 55d. The depth A of the recesses 72a and 72c is a value obtained by subtracting the compression thickness B of the first vibration isolation materials 73b and 73d from the thickness C of the second vibration isolation materials 73a and 73c. For example, when the thickness C is 2 mm and the thickness B is 0.5 mm, the depth A of the recesses 72a and 72c is 1.5 mm. In addition, PORON-H32 (micro cell polymer sheet) made from INOAC is used for the first vibration isolation materials 73b and 73d and the second vibration isolation materials 73a and 73c.

  Next, a method for assembling the fan mounting structure according to Embodiment 1 will be described. FIGS. 4A and 4B are diagrams showing a state of the fan mounting structure according to Embodiment 1 of the present invention during assembly. FIG. 4A shows a state before the fan is mounted, and FIG. FIG. 4C shows a state after the fan is mounted.

  First, the rotational axis of the screw 55c (55a) is fitted into a through hole 52c (52a) provided in the casing 50, and the position where the casing 50 is arranged on the mounting base 70 is adjusted (FIG. 4A). Then, the screws 55d (55b) are screwed into the screw holes 71d (71a) through the through holes 52d (52b) provided in the casing 50 (FIGS. 4B and 4C).

  Before the screw 55d (55b) is tightened, the first vibration isolator 73d (73b) is in contact with the surface of the casing 50, but the second vibration isolator 73c (73a) is not in contact with the surface of the casing 50. is there. This is the value obtained by subtracting the depth of the first vibration isolator 73d (73b) from the thickness of the second vibration isolator 73c (73a), and the depth of the recess 72c (72a) provided in the mounting base 70. This is because (Fig. 4 (b)).

  Then, by tightening the screw 55d (55b), the first vibration isolator 73d (73b) is compressed and its thickness changes, and the second vibration isolator 73c (73a) is attached to the mounting base 70 in synchronization therewith. When approaching the surface and coming into contact with the surface, the fastening of the screw 55d (55b) is finished. After the screws 55d (55b) are tightened, the thickness of the first vibration isolator 73d (73b) is thinner than before the attachment, but the thickness of the second vibration isolator 73c (73a) is equal to that before the attachment ( FIG. 4 (c)).

  In the arrangement position of the first vibration isolating materials 73b and 73d, the compression restoring force of the first vibration isolating materials 73b and 73d acts on the casing 50. This restoring force acts on one diagonal position, and the force The direction is perpendicular to the surface of the mounting base 70. On the other hand, the second vibration isolating material 73a and 73c are disposed so that the casing 50 and the second vibration isolating materials 73a and 73c are in contact with each other. There is no force acting on the casing 50 by 73a, 73c. Thus, a force acts only at one diagonal position, and the force acts equally in the vertical direction. Accordingly, the casing 50 is not deformed and bent, and accordingly, noise such as a roaring sound can be prevented from being generated from the fan 5.

  In this example, the depth of the recesses 72a and 72c is set to a value obtained by subtracting the thickness of the first vibration isolation materials 73b and 73d from the thickness of the second vibration isolation materials 73a and 73c. The first vibration isolation materials 73b and 73d and the second vibration isolation materials 73a and 73c can be made of the same material and thickness. Therefore, the same vibration-proofing material can be affixed to all of the through holes 52a, 52b, 52c, and 52d provided in the casing 50 of the fan 5, which is useful from the viewpoint of work process and cost. That is, even if the first anti-vibration materials 73b and 73d and the second anti-vibration materials 73a and 73c are mistakenly attached, no problem occurs.

(Embodiment 2)
5 is an exploded perspective view showing a fan mounting structure according to Embodiment 2 of the present invention, and FIG. 6 is a cross-sectional view showing the fan mounting structure according to Embodiment 2 of the present invention. 6 corresponds to the cross section taken along line VI-VI in FIG.

  On the surface of the mounting base 80, unlike the first embodiment, convex portions 82b and 82d are formed at one diagonal position. Screw holes 81b and 81d are formed in the convex portions 82b and 82d, and screw holes 81a and 81c are formed in the other diagonal position. Compressible first vibration isolation materials 83b and 83d are disposed at the positions of the screw holes 81b and 81d, and second vibration isolation materials 83a and 83c are disposed at the positions of the screw holes 81a and 81c, respectively. Note that the height D of the convex portions 82b and 82d is a value obtained by subtracting the thickness E of the first vibration isolating materials 83b and 83d from the thickness F of the second vibration isolating materials 83a and 83c. Since other structures are the same as those of the first embodiment, the corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  Next, a method for assembling the fan mounting structure according to Embodiment 2 will be described. 7A and 7B are views showing a state when the fan mounting structure according to the second embodiment of the present invention is assembled. FIG. 7A is a state before the fan is mounted, and FIG. FIG. 7C shows the state after the fan is mounted.

  First, the rotational shaft of the screw 55c (55a) is fitted into the through hole 52c (52a) provided in the casing 50, and the position where the casing 50 is arranged on the mounting base 80 is adjusted (FIG. 7A). Then, the screws 55d (55b) are screwed into the screw holes 81d (81a) through the through holes 52d (52b) provided in the casing 50 (FIGS. 7B and 7C).

  Before the screw 55d (55b) is tightened, the first vibration isolator 83d (83b) is in contact with the surface of the casing 50, but the second vibration isolator 83c (83a) is not in contact with the surface of the casing 50. is there. This is a value obtained by subtracting the thickness of the first vibration isolation material 83d (83b) from the thickness of the second vibration isolation material 83c (83a) from the height of the convex portion 82d (82b) provided on the mounting base 80. This is because (FIG. 7B).

  Then, by tightening the screw 55d (55b), the first vibration isolator 83d (83b) is compressed and its thickness changes, and the second vibration isolator 83c (83a) of the mounting base 80 is synchronized with it. When approaching the surface and coming into contact with the surface, the fastening of the screw 55d (55b) is finished. After the screws 55d (55b) are tightened, the thickness of the first vibration isolator 83d (83b) is smaller than that before the attachment, but the thickness of the second vibration isolator 83c (83a) is equal to that before the attachment ( FIG. 7 (c)).

  As described above, even if the convex portions 82b and 82d are provided at one diagonal position of the mounting base 80, the casing 50 is not deformed and bent as in the first embodiment. It is possible to prevent noise such as a roaring sound from being generated from the fan 5.

  In addition, since the height of the convex portions 82b and 82d is set to a value obtained by subtracting the thickness of the first vibration isolation materials 83b and 83d from the thickness of the second vibration isolation materials 83a and 83c. The anti-vibration materials 83b and 83d and the second anti-vibration materials 83a and 83c can be made of the same material and thickness. Therefore, as in the first embodiment, even if the first anti-vibration members 83b and 83d and the second anti-vibration members 83a and 83c are mistakenly attached, no problem occurs.

(Embodiment 3)
8 is an exploded perspective view showing a fan mounting structure according to Embodiment 3 of the present invention, and FIG. 9 is a cross-sectional view showing the fan mounting structure according to Embodiment 3 of the present invention. 9 corresponds to a cross section taken along line IX-IX in FIG.

  Unlike the first and second embodiments, the mounting base 90 is planar. Screw holes 91a and 91c and screw holes 91b and 91d are formed at respective diagonal positions of the mounting base 90. Compressible first vibration isolation materials 93b and 93d are disposed at the positions of the screw holes 91b and 91d, and second vibration isolation materials 93a and 93c are disposed at the positions of the screw holes 91a and 91c, respectively. The thickness of the second vibration isolator 93a, 93c is made to coincide with the thickness of the first vibration isolator 93b, 93d when compressed. Since other structures are the same as those of the first embodiment, the corresponding parts are denoted by the same reference numerals, and detailed description thereof is omitted.

  Next, a method for assembling the fan mounting structure according to Embodiment 3 will be described. FIGS. 10A and 10B are views showing a state when the fan mounting structure according to the third embodiment of the present invention is assembled. FIG. 10A shows a state before the fan is mounted, and FIG. FIG. 10C shows the state after the fan is mounted.

  First, the rotational axis of the screw 55c (55a) is fitted into a through hole 52c (52a) provided in the casing 50, and the position where the casing 50 is arranged on the mounting base 90 is adjusted (FIG. 10 (a)). Then, the screws 55d (55b) are screwed into the screw holes 91d (91a) through the through holes 52d (52b) provided in the casing 50 (FIGS. 10B and 10C).

  Before the screw 55d (55b) is tightened, the first vibration isolator 93d (93b) is in contact with the surface of the casing 50, but the second vibration isolator 93c (93a) is not in contact with the surface of the casing 50. is there. This is because the thickness of the second vibration isolator 93c (93a) is made to coincide with the thickness of the first vibration isolator 93d (93b) when compressed (FIG. 10B).

  Then, by tightening the screw 55d (55b), the first vibration isolator 93d (93b) is compressed and its thickness changes, and the second vibration isolator 93c (93a) of the mounting base 90 is synchronized with it. When approaching the surface and coming into contact with the surface, the fastening of the screw 55d (55b) is finished. After the screws 55d (55b) are tightened, the thickness of the first vibration isolator 93d (93b) is smaller than that before mounting, and is equal to the thickness of the second vibration isolator 93c (93a). The thickness of the second vibration isolator 93c (93a) is equal to that before attachment.

  As described above, even when the mounting surface of the mounting base 90 is flat, the thicknesses of the first vibration isolating materials 93b and 93d and the second vibration isolating materials 93a and 93c are adjusted, so that the first embodiment and the first embodiment are implemented. As in the second embodiment, the casing 50 is not deformed and bent, and accordingly, it is possible to prevent the fan 5 from generating noise such as a roaring sound. Moreover, in this example, compared with Embodiment 1 and Embodiment 2, the first vibration isolator 93b, 93d and the second vibration isolator 93a, 93c cannot be made of the same material and thickness. There is no need to provide the mounting base 90 with a concave or convex portion. Therefore, the processing cost of the mounting base 90 can be reduced.

  In each embodiment, the first vibration isolation material and the second vibration isolation material are each described as one member. However, the first vibration isolation material and / or the second vibration isolation material is composed of a plurality of members. You may make it use it, overlapping. For example, a stack of N1 anti-vibration materials is a first anti-vibration material, and a stack of N2 anti-vibration materials is a second anti-vibration material. For example, in Embodiment 1, assuming that the thickness of the vibration isolator is T, the depth of the recess is A, and the thickness of the first vibration isolator when compressed is B, A + B = T × N2 (Equation 1) is satisfied. Thus, each parameter is determined as appropriate. Since the thickness B at the time of compression of the first vibration isolator is determined by tightening the screws, the number N1 does not appear in Equation 1, but this number N1 depends on the screw fixing torque when the casing is attached to the mounting base. Determined. Of course, the first vibration isolator and the second vibration isolator may be made of different materials.

It is a perspective view which shows the display apparatus to which the fan attachment structure concerning this invention is applied. It is a disassembled perspective view which shows the fan attachment structure which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the fan attachment structure which concerns on Embodiment 1 of this invention. It is a figure which shows the state at the time of the assembly of the fan attachment structure which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the fan attachment structure which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the fan attachment structure which concerns on Embodiment 2 of this invention. It is a figure which shows the state at the time of the assembly of the fan attachment structure which concerns on Embodiment 2 of this invention. It is a disassembled perspective view which shows the fan attachment structure which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the fan attachment structure which concerns on Embodiment 3 of this invention. It is a figure which shows the state at the time of the assembly of the fan attachment structure concerning Embodiment 3 of this invention.

Explanation of symbols

5 Fan 50 Casing 51 Opening 52a, 52b, 52c, 52d Through hole 55a, 55b, 55c, 55d Screw 70 Mounting base 71a, 71b, 71c, 71d Spiral hole 72a, 72c Recess 73a, 73c Second vibration isolator 73b, 73d First vibration isolator 80 Mounting base 81a, 81b, 81c, 81d Spiral hole 82b, 82d Protruding part 83a, 83c Second vibration isolator 83b, 83d First vibration isolator 90 Mounting base 91a, 91b, 91c, 91d Spiral Hole 93a, 93c Second vibration isolator 93b, 93d First vibration isolator

Claims (6)

In a fan mounting structure in which a fan in which a rotor blade is housed in a casing in which a through hole is formed at one diagonal position is attached to a mounting body by tightening a screw inserted into the through hole.
A compressible first vibration isolator is disposed at the one diagonal position,
A fan mounting structure, wherein a second vibration isolator having a thickness corresponding to the thickness of the first vibration isolator compressed by tightening the screw is disposed at the other diagonal position. A recess is formed at the position where the second vibration isolator of the mounting body is disposed,
2. The fan mounting according to claim 1, wherein the depth of the concave portion is set to a value obtained by subtracting a thickness of the first vibration isolation material when compressed from the thickness of the second vibration isolation material. Construction. A convex portion is formed at the position where the first vibration isolator of the mounting body is disposed,
2. The fan according to claim 1, wherein the height of the convex portion is set to a value obtained by subtracting a thickness of the first vibration isolation material when compressed from the thickness of the second vibration isolation material. Mounting structure. The fan mounting structure according to claim 2 or 3, wherein the first vibration isolating material and the second vibration isolating material are made of the same material and thickness. The surface of the mounting body is flat,
2. The fan mounting structure according to claim 1, wherein the thickness of the second vibration isolator coincides with the thickness of the first vibration isolator when compressed. A through hole is formed at the other diagonal position;
The alignment part for aligning the position with the casing by being inserted into the through-hole is formed or arranged on the attachment body. 6. The described fan mounting structure.

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