JP5881866B2 - Electronic device having fan fixing structure - Google Patents

Description

  The present invention relates to a fan fixing structure in an electronic apparatus.

  For example, the fan fixing structure disclosed in Patent Document 1 includes a fan having a square fan frame, an elastic member sandwiched between the outside of the fan frame, and a case in which one side where the elastic member is fitted is opened. The fitting side formed on the edge of the case is elastically pressed and fitted to the frame of the electronic device and fixed.

Japanese Patent Laid-Open No. 11-68364

In the conventional technique represented by Patent Document 1, the elastic member restricts movement in the thickness direction in addition to the outer peripheral surface of the fan, thereby generating abnormal noise such as chatter noise even when vibration is applied. And the fan can be fixed to the frame of the electronic device.
However, in addition to the case that serves as a holder for holding the fan, an elastic member for elastically fixing the fan is necessary, and there is a concern that the assembly process may be complicated due to an increase in the number of parts.

  In Patent Document 1, since the fan is merely sandwiched between elastic members, the degree of repression is affected by the dimensional errors of the fan, the elastic member, and the case. Accordingly, when a force is applied to the frame side of the electronic device along the thickness direction during or after the assembly operation, the fan may be inclined toward the frame side of the electronic device.

The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an electronic device having a fan fixing structure that can prevent generation of abnormal noise due to vibration or the like with a simple configuration. To do.

An electronic device having a fan fixing structure according to the present invention includes a fan and a holder on which the fan is fitted, and the fan fixing structure is assembled and fixed to the chassis of the electronic device via the holder. A first elastic shape portion that biases the fan fitted to the holder in the thickness direction of the fan is provided, and the chassis of the electronic device has a first elastic shape with respect to the fan assembled via the holder. A first abutting portion that regulates displacement in the thickness direction of the fan by abutting from the opposite side of the urging direction by the portion, and the holder abuts the bottom surface of the chassis when assembled to the chassis of the electronic device A protruding part for screwing is provided on the side opposite to the lower end, and the chassis of the electronic device has a seat surface for screwing the protruding part, and the holder is assembled to the chassis of the electronic device. Characterized in that the lowermost end of the holder clearance is formed between the projecting portion and the seat surface in a state in contact with the bottom surface of the chassis.

  According to the present invention, there is an effect that it is possible to prevent the generation of abnormal noise due to vibration or the like with a simple configuration.

It is a perspective view which shows the electronic device to which the fixing structure of the fan which concerns on Embodiment 1 of this invention is applied. It is a disassembled perspective view of the electronic device of FIG. It is a figure (before assembly | attachment) which shows the fan and holder in the fixing structure of the fan which concerns on Embodiment 1. FIG. It is a figure (after an assembly | attachment) which shows the fan and holder in the fixing structure of the fan which concerns on Embodiment 1. FIG. 1 is a perspective view showing a fan fixing structure according to Embodiment 1. FIG. It is FIG. (1) which shows the process of assembling | attaching a fan to the chassis of an electronic device via a holder. It is FIG. (2) which shows the process of assembling | attaching a fan to the chassis of an electronic device via a holder. It is FIG. (3) which shows the process of assembling | attaching a fan to the chassis of an electronic device via a holder. It is FIG. (4) which shows the process of assembling | attaching a fan to the chassis of an electronic device via a holder. It is a figure which shows a mode when the holder holding a fan is screwed to the chassis of an electronic device.

Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
1 is a perspective view showing an electronic apparatus to which a fan fixing structure according to Embodiment 1 of the present invention is applied. FIG. 2 is an exploded perspective view of the electronic device of FIG. The electronic device 1 is, for example, an in-vehicle information device (navigation device or the like), and is configured by combining an upper chassis 2 serving as a top plate with a box-shaped lower chassis 3 having an open surface as shown in FIG. Is done.
In the electronic device 1, the fan 5 fitted to the substrate 4 and the holder 6 is accommodated in an internal space formed by combining the upper chassis 2 and the lower chassis 3.

FIG. 3 is a diagram (before assembly) showing the fan and the holder in the fan fixing structure according to the first embodiment. FIG. 4 is a diagram (after assembling) showing the fan and the holder in the fan fixing structure according to the first embodiment. As shown in FIG. 3, the fan 5 is a cooling fan for heat dissipation, for example, and is configured by a rectangular frame. In addition, the fan 5 is supplied with electric power through the lead wire 5a and the connector 5b and rotates to generate an air flow.
The holder 6 is a frame-shaped sheet metal holder in which the fan 5 is fitted. Elastic shape portions 6 a, 6 b and 6 c are formed on the inner peripheral portion of the holder 6. On one surface of the holder 6 in the thickness direction, elastic shaped portions 6d, 6e, 6f, and 6g are formed as shown in FIG.

The elastic shape portions 6 a, 6 b, 6 c are formed by cutting and bending the inner peripheral portion of the holder 6 inward, and urge the outer periphery of the frame of the fan 5 fitted to the holder 6 inward. Thereby, rattling of the fan 5 in the holder 6 can be prevented.
Further, the base portion where the elastic shape portions 6 a, 6 b, 6 c are connected to the inner peripheral portion of the holder 6 is formed so as to be located on the opening side where the fan 5 is fitted. Thereby, the fan 5 can be smoothly fitted into the holder 6.

The elastic shape portions 6d, 6e, 6f, and 6g are formed on one surface of the holder 6 in the thickness direction, and bias the fan 5 fitted to the holder 6 in the thickness direction. That is, before the electronic device 1 is assembled to the lower chassis 3, the fan 5 slightly protrudes from the holder 6 due to the urging of the elastic portions 6 d, 6 e, 6 f, 6 g.
The elastic shapes 6d, 6e, 6f, and 6g correspond to the first elastic shape, and the elastic shapes 6a, 6b, and 6c correspond to the second elastic shape.

  Further, as shown in FIG. 4B, the holder 6 has a tongue piece 6h extending from the peripheral edge of the opening into which the fan 5 is fitted. The tongue piece 6h has an obtuse corner at the corner where the lead wire 5a of the fan 5 contacts. If this tongue piece 6h is not present and the corner portion with which the lead wire 5a comes into contact has an acute angle, the lead wire 5a may bite into the acute corner portion and be damaged when the fan 5 is fitted into the holder 6. There is. Therefore, the tongue 6h having an obtuse corner is formed to prevent the lead wire 5a from being bitten.

FIG. 5 is a perspective view showing a fan fixing structure according to the first embodiment. 6 to 9 are views showing a process of assembling the fan to the chassis of the electronic device through the holder.
As shown in FIG. 5, the fan 5 is assembled to the lower chassis 3 of the electronic device 1 via the holder 6. As shown in FIG. 6, the fan 5 is attached along the vent 3 </ b> C formed on the side surface 3 </ b> A of the lower chassis 3.

The lower chassis 3 has a plurality of guide shapes that guide the holder 6 fitted with the fan 5 in the assembly direction C. First, on the side surface 3A of the lower chassis 3, assembly guide portions 3a and 3b are formed that are positioned on both sides in the width direction of the holder 6 during assembly. The assembly guide portion 3a is formed by bending an end portion of the plate-like portion 3g serving as a screwing seat surface of the holder 6 toward the assembly direction C side. Similarly, the assembly guide portion 3b is formed by bending an end portion of the plate-like portion 3h serving as a screwing seat surface of the holder 6 toward the assembly direction C side.
When the holder 6 fitted with the fan 5 is assembled, the holder 6 is guided in the assembling direction C by the assembling guide portions 3a and 3b as shown in FIG.

Further, contact portions 3c, 3d, and 3e are formed on the side surface 3A and the bottom surface 3B of the lower chassis 3 as shown in FIG. The contact portion 3c is formed, for example, by bending the end of a small piece (the contact portion 3c-2) obtained by cutting and raising the side surface 3A. The contact portion 3d is formed by cutting and raising the bottom surface 3B, for example. The contact portion 3e is formed, for example, by bending a part of a small piece (the contact portion 3f) obtained by cutting and raising the bottom surface 3B.
The fan 5 fitted in the holder 6 is urged in the thickness direction by the elastic shape portions 6d, 6e, 6f, 6g, and the contact portions 3c, 3d, 3e are, as shown in FIG. It abuts on the fan 5 from the opposite side to the urging direction.
In this manner, the contact portions 3c, 3d, and 3e abut against the fan 5, whereby the displacement in the thickness direction of the fan 5 after assembly is regulated. Thereby, the fan 5 can be assembled | attached to the lower chassis 3 without backlash.
The hit portions 3c, 3d, and 3e correspond to the first hit portion.

Further, as shown in FIG. 6, the contact portions 3c, 3d, and 3e have assembly guide portions 3c-1, 3d-1, 3e-1, and 3f- which are guide-shaped portions that guide the holder 6 in the assembly direction C. 1 is formed. For example, the assembly guide portions 3 c-1, 3 d-1, 3 e-1, and 3 f-1 are directions in which the end portions of the small pieces that become the contact portions 3 c, 3 d, and 3 e are separated from the fan 5 in the thickness direction of the fan 5. It is formed by bending.
By forming in this way, as shown in FIGS. 7 and 8, the fan 5 fitted in the holder 6 can be smoothly guided to the contact portions 3c, 3d, and 3e during assembly.

Further, the holder 6 is formed with a bent portion 6i-1 bent outward in one of the width directions as shown in FIG. 6, and an L-shaped portion 6i extending along the assembling direction on the other side in the width direction. -2 is formed.
Further, a contact portion 3 c-2 is formed on the side surface 3 </ b> A of the lower chassis 3, and a contact portion 3 f is formed on the bottom surface 3 </ b> B of the lower chassis 3. The hit part 3c-2 corresponds to a second hit part, and the hit part 3f corresponds to a third hit part.
In the first embodiment, the contact part 3c described above is formed integrally with the contact part 3c-2, and the contact part 3e is formed integrally with the contact part 3f.

As shown in FIG. 7, when the holder 6 fitted with the fan 5 is assembled, the holder 6 is guided in the assembling direction C by the assembling guide portions 3a and 3b.
Subsequently, as shown in FIG. 8, the end a1 of the bent portion 6i-1 of the holder 6 and the contact portion 3c-2 of the lower chassis 3 come into contact with each other, and one of the holders 6 in the width direction (the bent portion 6i-1 The displacement on the side on which the is formed is regulated.
When the holder 6 is further advanced in the assembly direction C, as shown in FIG. 9, the end portion a <b> 2 of the L-shaped portion 6 i-2 of the holder 6 and the contact portion 3 f of the lower chassis 3 come into contact with each other. The displacement of the other side (the side on which the L-shaped portion 6i-2 is formed) is restricted.
In this way, the holder 6 can be assembled to the lower chassis 3 without being inclined with respect to the assembling direction C.

Further, as shown in FIG. 6, the holder 6 is provided with a protruding portion 6 j for screwing on the side opposite to the lower end that comes into contact with the bottom surface 3 </ b> B when assembled to the lower chassis 3.
The overhanging portion 6j is a plate-like portion extending outward on both sides in the width direction of the holder 6, and has positioning holes 6k and 6l and screw insertion holes 6m and 6n.
Furthermore, slits 6o and 6p are formed at the base of the overhanging portion 6j connected to the holder 6 so as to bend easily toward the seat surface when screwing.

  Further, on the side surface 3A of the lower chassis 3, plate-like portions 3g and 3h serving as screw seats are formed. The plate-like parts 3g and 3h are screwing seating surfaces provided on the side surface 3A of the lower chassis 3 and having a flat part parallel to the bottom surface 3B, and screwing holes 3k and 3l in which screw grooves are formed. Is formed. In the first embodiment, positioning projections 3i and 3j are integrally formed on the plate-like portions 3g and 3h.

  As shown in FIG. 9, when the holder 6 fitted with the fan 5 is assembled to the lower chassis 3, the projections 3i and 3j of the plate-like portions 3g and 3h are formed in the holes 6k and 6l of the overhanging portion 6j. Each inserted. Thereby, the holder 6 is positioned at a normal assembly position in the lower chassis 3. At this time, the screw insertion holes 6m and 6n in the overhanging part 6j and the screwing holes 3k and 3l in the plate-like parts 3g and 3h are overlapped.

FIG. 10 is a diagram illustrating a state in which a holder that holds a fan is screwed to a chassis of an electronic device. FIG. 10A shows a fan fixing structure after the holder 6 is fixed with screws, and FIG. 10B is a cross-sectional view taken along the line AA in FIG.
As shown in FIG. 10B, in the first embodiment, the height dimension of the holder 6 is set so that the height of the overhanging portion 3j is higher than the plate-like portions 3g and 3h in the state after assembly.
That is, when the holder 6 is normally assembled to the lower chassis 3, the lowermost end of the holder 6 comes into contact with the bottom surface 3 </ b> B of the lower chassis 3 and is appropriately positioned. Thereby, generation | occurrence | production of the backlash after an assembly | attachment can be prevented reliably.

In the state after assembly, as shown in FIG. 10B, a clearance B is formed between the overhanging portion 3j and the plate-like portions 3g and 3h.
In the state where the clearance B is formed, as shown in FIG. 10A, when the overhanging portion 6j and the plate-like portions 3g and 3h are screwed with screws 7 and 8, the rigidity of the overhanging portion is temporarily maintained. If so, the overhanging portion may be distorted with the screwing portion as a fulcrum, and the holder 6 may float from the bottom surface 3B.

Therefore, slits 6o and 6p are formed in the base portion of the overhang portion 6j connected to the holder 6 so as to bend easily toward the seat surface when screwing.
As shown in FIG. 10 (a), when the overhanging portion 6j and the plate-like portions 3g and 3h are screwed with screws 7 and 8, each overhanging portion 6j ahead of the slits 6o and 6p becomes the plate-like portion 3g, Deflection to 3h side. Accordingly, it is possible to firmly screw the overhanging portion 6j and the plate-like portions 3g and 3h while maintaining the state where the lowermost end of the holder 6 is in contact with the bottom surface 3B.

As described above, according to the first embodiment, the holder 6 includes the elastic shape portions 6d, 6e, 6f, and 6g that urge the fan 5 fitted to the holder 6 in the thickness direction, and the electronic apparatus 1, the lower chassis 3 is brought into contact with the fan 5 assembled via the holder 6 from the opposite side of the urging direction by the elastic shapes 6 d, 6 e, 6 f, 6 g. Contact portions 3c, 3d, and 3e for restricting the displacement are provided.
In this way, the lower chassis 3 is urged in the thickness direction through the holder 6 by simply adding simple configurations such as the elastic shape portions 6d, 6e, 6f, 6g and the contact portions 3c, 3d, 3e. Can be assembled. Thereby, it is possible to reliably prevent the generation of noise due to vibration or the like due to the play in the thickness direction of the fan 5.

  Moreover, according to this Embodiment 1, since the holder 6 has the elastic-shaped parts 6a, 6b, 6c which urge the fan 5 inward on the surface facing the frame outer periphery of the fan 5 fitted, Shaking of the fan 5 in the holder 6 can be prevented.

  Furthermore, according to the first embodiment, the holder 6 has the bent portion 6i-1 bent outward in one side in the width direction, and the L-shaped portion 6i extending along the assembly direction in the other side in the width direction. -2 and the lower chassis 3 assembles the holder 6 in which the fan 5 is fitted, the bent portion 6i-1 comes into contact with the contact portion 3c- to regulate one displacement in the width direction of the holder 6 2 and a contact portion 3f that abuts the L-shaped portion 6i-2 and restricts the other displacement of the holder 6 in the width direction. With this configuration, the holder 6 can be assembled to the lower chassis 3 without being inclined with respect to the assembling direction C.

  Further, according to the first embodiment, the holder 6 extends from the peripheral edge of the opening in which the fan 5 is fitted, and the tongue 6h in which the corner portion with which the lead wire 5a of the fan 5 contacts is formed at an obtuse angle. Therefore, when the fan 5 is fitted into the holder 6, the lead wire 5a can be prevented from being caught in the corner portion.

  Further, according to the first embodiment, when the lower chassis 3 assembles the holder 6 on which the fan 5 is fitted, the assembling guide portions 3a, 3b3c-1, 3d-1 for guiding the holder 6 in the assembling direction. , 3e-1, 3f-1. By comprising in this way, it becomes possible to assemble the holder 6 smoothly.

Furthermore, according to the first embodiment, the holder 6 includes the overhanging portion 6j for screwing on the side opposite to the lower end that contacts the bottom surface 3B of the chassis 3 when the holder 6 is assembled to the lower chassis 3, and the lower chassis 3 includes plate-like portions 3g and 3h which are seating surfaces for screwing the overhanging portion 6j, and when the holder 6 is assembled to the lower chassis 3, the overhanging is performed with the lowermost end of the holder 6 in contact with the bottom surface 3B. A clearance B is formed between the portion 6j and the plate-like portions 3g and 3h.
By comprising in this way, generation | occurrence | production of the backlash after an assembly | attachment can be prevented reliably.

  Furthermore, according to the first embodiment, since the slits 6o and 6p are formed at the base of the overhanging portion 6j connected to the holder 6, the overhanging while maintaining the state where the lowermost end of the holder 6 is in contact with the bottom surface 3B. The portion 6j and the plate-like portions 3g and 3h can be firmly screwed.

  In the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted within the scope of the invention.

The electronic device having the fan fixing structure according to the present invention can prevent the generation of abnormal noise due to vibration or the like with a simple configuration, and therefore the on-vehicle electronic device that is highly likely to generate vibration due to running of the vehicle. It is suitable for.

  1 Electronic equipment, 2 Upper chassis, 3 Lower chassis, 3a, 3b, 3c-1, 3d-1, 3e-1, 3f-1 Assembly guide part, 3c, 3c-2, 3d, 3e, 3f Per part, 3g , 3h Plate-like part, 3i, 3j Protruding part, 3k, 3l Screw hole part, 3A side face, 3B bottom face, 3C vent hole, 4 substrate, 5 fan, 6 holder, 6a, 6b, 6c, 6d, 6e, 6f, 6g Elastic shape part, 6h Tongue piece, 6i-1 Bending part, 6i-2 L-shaped part, 6j Overhang part, 6k, 6l, 6m, 6n hole part, 6o, 6p slit, 7, 8 screw.

Claims (6)

In a fan fixing structure comprising a fan and a holder in which the fan is fitted, and being assembled and fixed to a chassis of an electronic device via the holder,
The holder includes a first elastic shape portion that urges the fan fitted to the holder in a thickness direction of the fan,
The chassis of the electronic device regulates displacement in the thickness direction of the fan by contacting the fan assembled through the holder from the opposite side of the urging direction by the first elastic shape portion. Comprising a first hit part,
The holder includes a projecting portion for screwing on a side opposite to a lower end that contacts the bottom surface of the chassis when assembled to the chassis of the electronic device,
The chassis of the electronic device includes a seating surface for screwing the protruding portion,
When the holder is assembled to the chassis of the electronic device, a clearance is formed between the projecting portion and the seat surface in a state where the lowermost end of the holder is in contact with the bottom surface of the chassis. An electronic device having a fan fixing structure. 2. The fan fixing structure according to claim 1, wherein the holder has a second elastic shape portion that urges the fan inward on a surface facing the outer periphery of the frame of the fan that is fitted . 3. Electronic equipment . The holder has a bent portion bent outward in one of the width directions, and has an L-shaped portion extending along the assembly direction in the other of the width directions ,
The chassis of the electronic device has a second contact portion that abuts against the bending portion and restricts one displacement in the width direction of the holder when the holder fitted with the fan is assembled, and the L-shape. The electronic device having a fan fixing structure according to claim 1, further comprising a third contact portion that contacts the shape portion and restricts the other displacement in the width direction of the holder. 2. The fan according to claim 1, wherein the holder has a tongue piece extending from a peripheral edge portion of an opening in which the fan is fitted, and a corner portion with which a lead wire of the fan contacts is formed at an obtuse angle. Electronic device having a fixed structure. 2. The fan fixing structure according to claim 1, wherein the chassis of the electronic device has a guide shape portion that guides the holder in an assembly direction when the holder fitted with the fan is assembled. 3. Electronic equipment . 2. The electronic device having a fan fixing structure according to claim 1, wherein the holder has a slit formed in a base portion to which the projecting portion is connected.

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