JP2010246244A - Outer case for centrifugal fan motor, centrifugal fan motor, centrifugal fan motor carrying electronic apparatus, outer case for axial fan motors, axial fan motor, and axial fan motor carrying electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the problem that a conventional fan motor is configured to provide an individual rubber protective case separately from a fan motor and is hard to reduce the device in size and requiring a lot of components used and uneconomical. <P>SOLUTION: An outer case for a centrifugal fan motor includes a case 6 having a fan 5 and covering an entire drive part rotary-driven with supplied power. The case 6 includes an air inlet port 25 through which air is taken-in with the fan 5 and an air discharge port 27 through which air is discharged with the fan 5. The case 6 is formed of an elastic member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an outer case made of an elastic material that constitutes a part of a centrifugal fan motor, a centrifugal fan motor having the outer case, and an electronic device equipped with the centrifugal fan motor. The present invention also relates to an outer case made of an elastic material that constitutes a part of the axial fan motor, an axial fan motor having the outer case, and an electronic device equipped with the axial fan motor.

  Conventionally, a cooling fan motor is used in various electronic devices. This type of fan motor is broadly classified into a centrifugal fan motor and an axial fan motor when classified according to its structure. Centrifugal fan motors have characteristics such as a specific speed of about 150 to 1000, high static pressure, and relatively low air volume, and are suitable for use in electronic devices that are mounted at high density and have high ventilation resistance. . On the other hand, the axial fan motor has the characteristics that the specific speed is about 1000 to 3000, the static pressure is low, and the air volume is relatively large. The axial fan motor is used for an electronic device that is mounted at a medium to low density and has low ventilation resistance. It is preferable.

  Since such a fan motor generates vibration at the time of rotation, various devices have been made in order to prevent the transmission of the vibration to an electronic device or to make it difficult to transmit the vibration. For example, means such as interposing an elastic sheet between a device main body of an electronic device and a fan motor or covering the fan motor with an elastic member are known.

JP 2000-166207 A JP 2002-329988 A

  As a conventional fan motor, there exists a thing as described in patent document 1, for example. Patent Document 1 describes a brushless fan motor used for cooling computers, other peripheral devices, and the like. The brushless fan motor according to Patent Document 1 is a brushless fan motor in which a rotating fan and a stator armature are housed in a case, and the case includes a vibration-proof rubber in a portion in contact with an arbitrary housing. It is characterized by that.

  According to the brushless fan motor having such a configuration (hereinafter referred to as “first conventional example”), vibration generated by the rotation of the rotary fan is absorbed and attenuated by the anti-vibration rubber. Transmitted to the body. Accordingly, it is expected that the vibration and noise caused by the brushless fan motor can be reduced.

  Further, as a second example of the conventional fan motor, for example, there is one described in Patent Document 2. Patent Document 2 describes a fan motor holding device suitable for an in-vehicle audio set and the like and an in-vehicle electronic device including the same. The fan motor holding device according to Patent Document 2 includes an elastic holding case that holds the fan motor so as to surround the outer periphery, and a support member that supports the elastic holding case. The fan motor is elastically held on the support member via the elastic holding case.

  According to the fan motor holding device having such a configuration (hereinafter referred to as “second conventional example”), the vibration of the fan motor is difficult to be transmitted to the sheet metal part of the in-vehicle electronic device, the printed circuit board, etc., and the mounting work is easy. The effect of realizing a simple fan motor holding structure is expected.

  However, in each of the first and second conventional examples described above, separately from the fan motor, the first conventional example is provided with an anti-vibration rubber, and the second conventional example is provided with an elastic protective case. The fan motor is housed and held in a vibration rubber or an elastic protective case. That is, an elastic member is further superimposed on the cover of the fan motor so that the vibration of the fan motor is not transmitted to the mounting portion by the elastic member. For this reason, the volume of the entire fan motor is increased by the amount of the anti-vibration rubber or the elastic protective case, and not only the device cannot be miniaturized, but also the number of parts used is uneconomical and assembly is not possible. There was a problem that workability at the time was also bad.

  The problem to be solved is that the conventional fan motor has a structure in which a rubber protective case is provided separately from the fan motor, so that it is difficult to reduce the size of the device, and the parts used are The number is uneconomical.

  The exterior case of this application is provided with the case which covers the whole drive part which has a rotation part provided with the fan, and a fixed part. The case has an intake port where air is sucked by a fan and an exhaust port where air is exhausted by the fan, and the case is formed of an elastic member.

  The fan motor of the present application includes a driving unit having a fixed unit and a rotating unit, a fan provided in the rotating unit, and a case that covers the entire driving unit. The case has an intake port where air is sucked by a fan and an exhaust port where air is exhausted by the fan, and the case is formed of an elastic member.

  The electronic device of the present application includes a fan motor, and the fan motor includes a driving unit having a fixed part and a rotating part, a fan provided in the rotating part, and a case that covers the entire driving part. ing. The case has an intake port where air is sucked by a fan and an exhaust port where air is exhausted by the fan, and the case is formed of an elastic member.

  According to the exterior case, the fan motor, and the electronic apparatus including the fan motor of the present application, the case forming a part of the fan motor is formed by an elastic member. Therefore, it is possible to reduce the size of the fan motor and the electronic device, and it is possible to reduce the number of parts used. Therefore, by reducing the number of parts, the workability at the time of assembly can be improved and the cost can be reduced.

It is a perspective view which decomposes | disassembles and shows the 1st Example of the centrifugal fan motor of this invention. It is the perspective view which expanded the case of the centrifugal fan motor shown in FIG. It is a front view of the case of the centrifugal fan motor shown in FIG. It is the XX sectional view taken on the line of FIG. It is the perspective view which looked at the state after the assembly of the centrifugal fan motor shown in FIG. 1 from the upper surface side. It is the perspective view which looked at the state after the assembly of the centrifugal fan motor shown in FIG. 1 from the bottom face side. It is the YY line expanded sectional view of FIG. It is a perspective view which decomposes | disassembles and shows the 1st Example of the axial fan motor of this invention. FIG. 8A is a perspective view, FIG. 8B is a plan view, FIG. 8C is a front view, FIG. 8D is a right side view, and FIG. 8E is a cross-sectional view taken along line ZZ in FIG. 8B. FIG. It is the perspective view which looked at the state after the assembly of the axial fan motor shown in FIG. 8 from the bottom face side. It is explanatory drawing which shows the 1st Example of the electronic device using the fan motor of this invention.

  A case constituting a part of the fan motor is formed of an elastic member. As a result, it is possible to reduce the size of the entire apparatus while increasing the thickness of the elastic member as much as possible to enhance the vibration isolation effect. In addition, it is possible to improve workability by taking advantage of the material characteristic of an elastic member having a vibration-proofing effect to realize easy assembly.

  FIGS. 1-7 is a figure which shows the centrifugal fan motor 1 which concerns on the 1st Example of the fan motor of this invention. As shown in FIG. 1, a centrifugal fan motor 1 of the present invention includes a motor base 2, a fixed portion 3 fixed to the motor base 2, a rotating portion 4 rotatably supported by the fixed portion 3, It is composed of a fan 5 provided in the rotating part 4 and a case 6 covering these.

  The motor base 2 of the centrifugal fan motor 1 is formed of a thin plate-like member having a rectangular shape, and is configured integrally with a flexible substrate 7 attached to one surface thereof. The flexible substrate 7 includes a base end portion 7a having the same shape as the motor base 2 superimposed on the motor base 2, a connection portion 7b connected to a connector (not shown), and the connection portion 7b and the base end portion. 7a and a connecting portion 7c for connecting to 7a. The flexible substrate 7 is provided with electrical wiring having a predetermined shape. Although not shown, an integrated circuit, a resistor, a capacitor, or other necessary electronic components may be mounted on the upper surface of the base end portion 7a.

  As shown in FIG. 7, a cylindrical bearing portion 8 that protrudes in a cylindrical shape is integrally provided at a substantially central portion of one surface of the motor base 2. Therefore, a central hole through which the cylindrical bearing portion 8 is inserted is provided in a substantially central portion of the base end portion 7 a of the flexible substrate 7. The fixed portion 3 is provided around the cylindrical bearing portion 8. As a material of the motor base 2, for example, metals such as stainless steel and steel steel can be used, and engineering plastics and ceramics having appropriate strength and rigidity can also be used.

  The fixed portion 3 includes a bearing cylinder 11, a stop plate 12, a stator yoke 13 having a coil receiving portion 21, a plurality of winding coils 14, and the like. As shown in FIG. 7, the bearing cylinder 11 is made of a pipe-like member having a bearing hole penetrating in the center, and is accommodated in the hole 15 of the cylinder bearing portion 7 of the motor base 2. A rotating shaft 16 is rotatably inserted in the central hole of the bearing cylinder 11. That is, the bearing cylinder 11 is a radial bearing that rotatably supports the rotating shaft 16. A stop plate 12 is disposed on the bearing cylinder 11. The stopper plate 12 is fitted to the upper end portion of the cylindrical bearing portion 8 to prevent the bearing tube 11 from coming out of the hole 15 and the lubricating oil filled in the hole 15 from leaking out. .

  A disc-shaped bearing plate 17 is disposed at the bottom of the hole 15 of the cylindrical bearing portion 8. The bearing plate 17 is a thrust bearing that supports the rotary shaft 16 from the axial direction. As the bearing cylinder 11 and the bearing plate 17, known thrust bearings and radial bearings can be used as appropriate. An annular groove continuous in the circumferential direction is provided on the bearing plate 17 side of the rotating shaft 16, and the rotating shaft 16 is prevented from coming off by a retaining ring 18 fitted in the annular groove. The end of the rotating shaft 16 on the side opposite to the bearing plate 17 passes through the holes of the bearing cylinder 11 and the retaining plate 12 and protrudes outward. A stator yoke 13 is fitted to the outside of the cylindrical bearing portion 8 so as to be concentric with the bearing cylinder 11 and the like.

  The stator yoke 13 is formed of a ring-shaped member having a hole through which the cylindrical bearing portion 8 is inserted at the center, and a plurality of (six in this embodiment) winding coils 14 are mounted on the outer periphery thereof. A coil receiver 21 is provided. The six coil receiving portions 21 are arranged at equal intervals in the circumferential direction, and a total of six winding coils 14 are attached to each of the coil receiving portions 21. As a material of the stator yoke 13, for example, a metal magnetic material such as an electromagnetic steel plate is suitable, but a soft magnetic material such as soft ferrite can also be used.

  The winding coil 14 is an air-core coil in which a coil wire having an appropriate thickness is wound from the inside to the outside. As the coil wire used for this, a conductive wire (insulating coated conductive wire) whose surface is coated with an insulating material can be used. For example, a copper wire whose surface is coated with an insulating material made of enamel, vinyl, polyurethane, polyester, or the like is suitable. Of course, other conductive materials such as aluminum and stainless steel can be used instead of the copper wire. It is.

  The rotating portion 4 is disposed so as to surround the upper surface and the side surface of the stator yoke 13 to which the winding coil 14 is attached. The rotating unit 4 includes the rotating shaft 16 that is rotatably supported by the fixed unit 3, a rotating body 22 that is fixed to the rotating shaft 16 and that rotates together with the rotating shaft 16, and a magnet 23 that is fixed to the rotating body 22. Etc. The rotating body 22 includes a main body portion 22a formed in a circular dome shape, a boss portion 22b provided at the center of the main body portion 22a, and a flange portion 22c provided continuously to the outer peripheral edge of the main body portion 22a. have. That is, the main body portion 22a of the rotating body 22 has a shape with a hole in the center, a boss portion 22b is provided at the center, and a flange portion 22c is provided at the outer peripheral edge thereof.

  The boss portion 22b of the rotating body 22 protrudes inside the main body portion 22a, and the tip end portion of the rotating shaft 16 is press-fitted into a boss hole opened in the center thereof. That is, the boss portion 22 b is fitted to a portion of the rotating shaft 16 that protrudes outward through the stopper plate 12, whereby the rotating body 22 is configured to be rotatable integrally with the rotating shaft 16. . In addition, a large number of fans 5 are provided integrally with the flange portion 22c of the rotating body 22 so as to extend outward in the radial direction. Each fan 5 is formed as a plate that is curved in an arc shape, and is configured to be able to rotate and blow with the rotating body 22.

  A ring-shaped magnet 23 is attached to the inner peripheral surface of the rotating body 22. The number of poles of the magnet 23 is 8 when 6 winding coils 14 shown in this embodiment are used, and 12 poles when 9 winding coils 14 are used, for example. However, the number of poles of the magnet 23 is not limited to these numbers, and can be set as appropriate. Six winding coils 14 disposed on the magnet 23 at substantially equal intervals on a substantially concentric circle are opposed to each other. In addition, as a material of the rotary body 22, magnetic bodies, such as iron (Fe) and stainless steel (SUS), can be used, for example.

  Case 6 shows the 1st example of an exterior case, and has a structure as shown in FIGS. That is, the case 6 is formed of a rectangular cube having a space portion slightly larger than the space portion occupied by the motor base 2, the fixing portion 3 fixed to the motor base 2, and the rotating portion 4 assembled to the fixing portion 3. . The case 6 includes a rectangular flat surface portion 6a, side surface portions 6b and 6c continuous to the left and right sides of the flat surface portion 6a, a back surface portion 6d continuous to the back surface side of the flat surface portion 6a, and bottom surfaces of both side surface portions 6b and 6c. It has the bottom face part 6e which continues to the side, and the inner wall board 24 arrange | positioned inside these.

  The flat surface portion 6a of the case 6 is provided with a circularly shaped intake port 25 at a substantially central portion thereof. The size of the intake port 25 may be set to be slightly smaller than the diameter of the circle (fan diameter) obtained by connecting the outer peripheral edges of a large number of fans 5 aligned in the circumferential direction. The left and right side surfaces 6b, 6c and the back surface 6d are all closed. The bottom surface portion 6e includes a left bottom surface portion 6e1 continuous with the left side surface portion 6b and a right bottom surface portion 6e2 continuous with the right side surface portion 6c, and a slit 26 having an appropriate size is set between the left and right bottom surface portions 6e1 and 6e2. Has been.

  The slit 26 is provided to elastically bend and deform the case 6 in the left-right direction, expand the slit 26, and insert the motor base 2 and the like into the case 6 from there. Accordingly, the size of the slit 26 can be arbitrarily set as long as the case 6 can be bent and deformed in the left-right direction by applying an appropriate bending force. Further, the front surface of the case 6 is greatly opened, and the opening constitutes an exhaust port 27.

  The inner wall portion 24 of the case 6 has a shape as shown in FIGS. That is, the inner wall portion 24 is formed as a curved surface that is curved in a substantially circular shape, but the approximate center O2 of the curved surface is slightly from the center O1 of the circle of the intake port 25 toward the left side surface portion 6b (for example, distance E). It is configured to be displaced. And the tongue part 28 is provided in the entrance part of the side by which the clearance gap with the inner wall part 24 was narrowed, and, thereby, the volume by the side of an entrance is narrowed.

  Furthermore, a base storage portion 29 that can store the motor base 2 is provided inside the bottom surface portion 6 e of the case 6. The base storage portion 29 is formed as a rectangular space portion having a shape and a size corresponding to the thickness and size (width) of the motor base 2 including the flexible substrate 7.

  The case 6 having such a shape and configuration is formed of one elastic member (butyl rubber material). As the material of the elastic member, rubber is preferable, and butyl rubber is particularly preferable. In this specification, the butyl rubber-based material is not only butyl rubber defined by JIS K6397, that is, a rubber-like copolymer (IIR) of isobutene and isoprene, but also some elements of the copolymer may be other elements (for example, In addition, modified products substituted with halogen such as bromine and chlorine are also included. Further, the polymerization ratio and molecular weight of isobutene and isoprene in the copolymer are not particularly limited. Such an elastic material preferably has a damping rate (tan δ) of 0.5 or more. The case 6 may be hollow as long as it has a predetermined outer shape, but if it is desired to obtain a greater vibration isolation effect, the case 6 is also filled with an elastic member. It is preferable.

  The rubber in the present invention is preferably a butyl rubber material, but is not limited thereto. For example, natural rubber, acrylic rubber, isoprene rubber, urethane rubber, ethylene / propylene rubber, epichlorohydrin rubber, chloroprene rubber, silicon rubber, styrene / butadiene rubber, fluorine rubber, butadiene rubber and the like can be mentioned. Two or more kinds of these rubbers may be used in combination. Furthermore, the rubber in the present invention includes, in addition to the above rubber, known additives for rubber, such as fillers, vulcanizing agents, processability-improving polymer materials, antioxidants, antioxidants, lubricants, flame retardants, etc. You may further contain a compounding agent.

  The centrifugal fan motor 1 includes the motor base 2, a fixing portion 3 fixed to the motor base 2, a rotating portion 4 rotatably supported by the fixing portion 3, a fan 5, and a case 6 covering these. Is configured.

  The centrifugal fan motor 1 having such a configuration can be assembled, for example, as follows, but is not necessarily limited to this assembly procedure. First, the fixing part 3 is assembled to the motor base 2. In this case, the stator yoke 13 to which the winding coils 14 are respectively attached is previously attached to the cylindrical bearing portion 8 and the six coil receiving portions 21 in advance. Then, both ends of the coil wire material of each winding coil 14 are soldered to predetermined positions of the electric wiring provided on the flexible substrate 7 laminated on the motor base 2.

  Next, the rotating shaft 16 to which the retaining ring 18 is attached is passed through the holes of the bearing cylinder 11 and the retaining plate 12. Then, the bearing plate 17 and the bearing cylinder 11 are inserted into the hole 15 of the cylindrical bearing portion 8 of the motor base 2 and the stopper plate 12 is fitted. Next, the boss hole of the boss portion 22 b of the rotating body 22 is press-fitted into the portion of the rotary shaft 16 that is rotatably supported by the fixed portion 3 by the bearing cylinder 11 and protrudes outward from the stop plate 12. As a result, the rotating unit 4 is rotatably supported with respect to the fixed unit 3, and the drive unit including the fixed unit 3 and the rotating unit 4 is assembled to the motor base 2.

Next, the motor base 2 assembled with the drive unit is assembled to the case 6. This can be done in two ways:
The first is a method in which the slit 26 is opened and widened, and the motor base 2 and the like are inserted from the bottom surface portion 6 e side of the case 6. In this case, as shown in FIG. 6, first, the left and right bottom surface portions 6e1 and 6e2 are opened to the outside as shown by the broken line arrow S1 starting from the central portion in the left-right direction of the flat portion 6a of the case 6, and slit 26 gaps are expanded in the left-right direction. Thereby, the bottom surface portion 6e side of the base storage portion 29 is largely opened, and is inserted into the space portion of the case 6 from the drive portion side as indicated by a broken line arrow S2. Then, the motor base 2 is inserted into the base storage portion 29.

  When the motor base 2 is inserted into the base storage portion 29, the left and right bottom surface portions 6e1 and 6e2 of the case 6 are restored to their original state by the restoring force of the case 6, and the slit 26 is initially narrowed. Return to state. As a result, the drive unit is accommodated in a substantially central portion of the space in the case 6, and the process of assembling the drive unit (the fixed unit 3 and the rotating unit 4) mounted on the motor base 2 to the case 6 is completed. As a result, as shown in FIGS. 6 and 7, the centrifugal fan motor 1 in which the motor base 2 constitutes a part of the components is obtained.

  Part 2 of the method of assembling the motor base 2 to the case 6 is a method of inserting the motor base 2 or the like from the exhaust port 27 provided on the front side of the case 6. In this case, as shown in FIG. 5, first, the flexible substrate 7 faces the exhaust port 27 of the case 6, and the flexible substrate 7 and the motor base 2 are inserted into the base storage portion 29 from the connection portion 7 b. Next, while sliding the motor base 2 or the like in the direction indicated by the broken line arrow T, the bottom surface portions 6e1 and 6e2 are expanded and the slit 26 is opened to elastically move the tongue portion 28 to the side. Then, the drive part is inserted to a predetermined position of the base storage part 29 by getting over the tongue part 28. As a result, the drive unit is accommodated in a substantially central portion of the space in the case 6, and the process of assembling the drive unit mounted on the motor base 2 to the case 6 is completed. As a result, as shown in FIGS. 5 and 7, the assembly process of the centrifugal fan motor 1 in which the motor base 2 forms a part of the components is completed.

  According to the centrifugal fan motor 1 of the present invention assembled as described above, a large number of fans 5 provided in the rotating unit 4 rotate integrally by supplying electric power to the driving unit and driving the rotating unit 4 to rotate. To do. As a result, outside air is sucked into the case 6 from the intake port 25 provided in the case 6, and the pressure is increased when rotating in the space, and is discharged to the outside from the exhaust port 27. At this time, the drive unit vibrates due to the rotation of the rotating unit 4, and the drive unit is held in the base storage unit 29 of the case 6 formed of rubber (especially butyl rubber is preferable) as an elastic member. Yes.

  Therefore, the vibration generated by the drive unit is attenuated and suppressed by the case 6 that surrounds the drive unit, so that the vibration is not transmitted to the outside, and the centrifugal fan motor 1 with less vibration can be provided. it can. Moreover, the centrifugal fan motor 1 has the case 6 directly elastically holding the drive unit, and does not have a structure in which an elastic member is further superimposed on the cover of the fan motor, unlike the conventional fan motor. Therefore, it is possible to reduce the size and thickness of the entire centrifugal fan motor 1 while increasing the thickness of the case 6 as much as possible.

  FIGS. 8-10 is a figure which shows the axial fan motor 50 which concerns on the 2nd Example of the fan motor of this invention. As shown in FIG. 8, the axial fan motor 50 of the present invention differs from the centrifugal fan motor 1 described above mainly in a case 51, a motor base 52, a fan 53, and a flexible substrate 62, and a fixed portion. 3 and the rotation part 4 are the same. Therefore, here, the case 51 and the like different from the above-described embodiment will be described in detail, and the same parts are denoted by the same reference numerals, and redundant description will be omitted.

  The axial fan motor 50 includes a case 51, a motor base 52, a fixed portion 3 fixed to the motor base 52, a rotating portion 4 rotatably supported by the fixing portion 3, and a rotating portion 4. The fan 53 is provided.

  A case 51 of the axial fan motor 50 shows a second specific example of the exterior case, and has a configuration as shown in FIGS. That is, the case 51 is formed of a rectangular cube having a space portion slightly larger than the space portion occupied by the motor base 52, the fixed portion 3 fixed to the motor base 52, and the rotating portion 4 assembled to the fixed portion 3. . The case 51 is opposed to the rectangular flat surface portion 51a, the side surface portions 51b and 51c continuous to the left and right sides of the flat surface portion 51a, the back surface portion 51d continuous to the back surface side of the flat surface portion 51a, and the flat surface portion 51a. It has a bottom part 51e and a front part 51f facing the back part 51d.

  The flat portion 51a of the case 51 is provided with a circularly shaped intake port 25 at a substantially central portion thereof. The size of the air inlet 25 may be set slightly smaller than the diameter of a circle obtained by connecting the outer peripheral edges of a large number of fans 5 aligned in the circumferential direction. The left and right side surfaces 51b and 51c are all closed. A communication hole 57 for pulling out the connecting portion 62b and the connecting portion 62c of the flexible substrate 62 is provided in the back surface portion 51d. The bottom surface portion 51e is provided with an exhaust port 54 formed in a circular shape having the same size at a position facing the intake port 25 of the flat surface portion 51a. Further, the front portion 51f is provided with a slit 55 extending in the vertical direction orthogonal to the front portion at the approximate center in the left-right direction.

  The slit 55 is continuous from the upper end to the lower end of the front portion 51f, and is also continued to the flat portion 51a and the bottom portion 51e. That is, the upper end of the front portion 51 f of the slit 55 reaches the intake port 25 continuously with the flat portion 51 a. Further, the lower end of the front portion 51f of the slit 55 continues to the bottom portion 51e and reaches the exhaust port 54. The slit 55 may be configured such that both end surfaces are in contact with each other, or may be configured not to contact each other by providing a gap between both end surfaces.

  The slit 55 is provided to expand the both sides of the slit 55 in the left-right direction so as to expose the inside of the case 51 and to insert the motor base 52 in which the drive unit is assembled into the case 51 from the opening. is there. Since the intake port 25 and the exhaust port 54 are communicated with both ends of the slit 55, the case 51 is formed of rubber (especially butyl rubber is preferable), which is an elastic member, as in the above embodiment. The opening can be opened sufficiently large.

  Further, a base storage portion 56 that can store the motor base 52 is provided inside the case 51 on the bottom surface portion 51 e side. The base storage portion 56 is formed as a rectangular space portion having a shape and size commensurate with the thickness and size (width) of the motor base 52 including the flexible substrate 62. The case 51 having such a shape and configuration is formed of one elastic member (butyl rubber material). The material of the elastic member is the same as that of the case 2. That is, the material of the case 51 is preferably rubber, and particularly preferably butyl rubber.

  The motor base 52 of the axial fan motor 50 is different from the motor base 2 in that an opening hole 61 communicating with the exhaust port 54 is provided. The motor base 52 is made of a thin plate-like member having a rectangular shape, and is configured integrally with a flexible substrate 62 attached to one surface thereof. The flexible substrate 62 includes a base end portion 62a having the same shape as the motor base 52 superimposed on the motor base 52, a connection portion 62b connected to a connector (not shown), and the connection portion 62b and the base end portion. And a connecting portion 62c for connecting the connecting portion 62a. The flexible substrate 62 is provided with electrical wiring having a predetermined shape. Although not shown, an integrated circuit, a resistor, a capacitor, or other necessary electronic components may be mounted on the upper surface of the base end portion 62a (may be provided on the lower surface, or may be provided on both upper and lower surfaces. ).

  The motor base 52 and the base end portion 62 a of the flexible substrate 62 are provided with an opening hole 61 penetrating between the upper and lower surfaces. In this embodiment, the opening hole 61 is formed as three arc-shaped elongated holes that are continuous by an appropriate length in the circumferential direction. The outer diameter of the opening hole 61 may be set to be approximately the same as the diameter of a circle (fan outer diameter) obtained by connecting the outer peripheral edges of a large number of fans 53 aligned in the circumferential direction. Moreover, the inner diameter of the opening hole 61 is preferably set to be approximately the same as the inner diameter of the fan.

  The rotating unit 4 includes a rotating shaft 16 that is rotatably supported by the fixed unit 3, a rotating body 65 that is fixed to the rotating shaft 16 and rotates integrally, a magnet 23 that is fixed to the rotating body 65, and the like. It is composed of The rotating body 65 includes a main body portion 65a formed in a circular dome shape, a boss portion 65b provided at the center of the main body portion 65a, and a flange portion 65c provided continuously to the outer peripheral edge of the main body portion 65a. have. That is, the main body portion 65a of the rotating body 65 has a shape with a hole in the center, a boss portion 65b is provided at the center, and a flange portion 65c is provided at the outer peripheral edge thereof.

  The boss 65b of the rotating body 65 protrudes inside the main body 65a, and the tip of the rotating shaft 16 is press-fitted into a boss hole opened at the center thereof. A large number of fans 53 are provided integrally with the flange portion 65c of the rotating body 65 so as to extend outward in the radial direction. Each fan 53 is formed as a blade that is appropriately twisted with respect to the rotation center of the rotating body 65. By rotating, each fan 53 sucks outside air from the intake side opposed to the intake port 25, and each outside air is taken into the air. Air can be blown from the exhaust side to the exhaust port 54 through the blades. The outer diameter of the flange portion 65 c is set to the same size as the inner diameter of the opening hole 61. As a result, the fan 53 faces the inside of the opening hole 61, and the opening hole 61 is used as the exhaust port 61.

  The axial fan motor includes the motor base 52, the fixed portion 3 fixed to the motor base 52, the rotating portion 4 rotatably supported by the fixed portion 3, a fan 53, and a case 51 covering these. 50 is configured.

  The axial fan motor 50 having such a configuration can be assembled, for example, as follows, but is not necessarily limited to this assembly procedure. First, the fixing part 3 is assembled to the motor base 52. In this case, the stator yoke 13 to which the winding coils 14 are respectively attached is previously attached to the cylindrical bearing portion 8 and the six coil receiving portions 21 in advance. Then, both ends of the coil wire material of each winding coil 14 are soldered to predetermined positions of the electric wiring provided on the flexible substrate 62 laminated on the motor base 52.

  Next, the rotating shaft 16 to which the retaining ring 18 is attached is passed through the holes of the bearing cylinder 11 and the retaining plate 12. Then, the bearing plate 17 and the bearing cylinder 11 are inserted into the hole 15 of the cylindrical bearing portion 8 of the motor base 52 and the stopper plate 12 is fitted. Next, the boss hole of the boss portion 65 b of the rotating body 65 is press-fitted into the portion of the rotary shaft 16 that is rotatably supported by the fixed portion 3 by the bearing cylinder 11 and protrudes outward from the stop plate 12. As a result, the rotating unit 4 is rotatably supported with respect to the fixed unit 3, and a drive unit including the fixed unit 3 and the rotating unit 4 is assembled to the motor base 52.

Next, the motor base 52 assembled with the drive unit is assembled to the case 51. This can be done as follows.
First, the slit 55 is opened to open the front portion 51f greatly. That is, as shown in FIG. 10, both sides from the slit 55 of the front portion 51 f of the case 51 are opened outward as indicated by the broken arrow U, and the gap of the slit 55 is expanded in the left-right direction. Thereby, the inside of the case 51 is largely opened, and the motor base 52 in which the drive unit is assembled is inserted into the space of the case 51 from the opening. Then, the motor base 52 is inserted into the base storage portion 56.

  As a result, when the motor base 52 is inserted into the base storage portion 56, the front portion 51f of the case 51 returns to its original state by its own restoring force, and the slit 55 returns to the initial narrowed state. . As a result, the drive unit is accommodated in a substantially central portion of the space in the case 51, and the process of assembling the drive unit (the fixed unit 3 and the rotating unit 4) mounted on the motor base 52 into the case 51 is completed. As a result, as shown in FIG. 10, an axial fan motor 50 in which the motor base 52 constitutes a part of the components is obtained.

  According to the axial fan motor 50 of the present invention assembled as described above, a large number of fans 53 provided in the rotating unit 4 are integrally formed by supplying electric power to the driving unit and rotationally driving the rotating unit 4. Rotate. As a result, outside air is sucked into the case 6 from the intake port 25 provided in the case 6, and the flow velocity is increased when passing through the fan 53, and is released to the outside from the exhaust port 54 that is installed facing the intake port 25. The At this time, vibration is generated in the drive unit due to the rotation of the rotating unit 4, and the drive unit is held in the base storage unit 56 of the case 51 formed of rubber (especially butyl rubber is preferable) as an elastic member. Yes.

  Therefore, the vibration generated by the drive unit is attenuated and suppressed by the case 51 that surrounds the drive unit. Therefore, the vibration is not transmitted to the outside, and the axial fan motor 50 with less vibration can be obtained. it can. In addition, the axial fan motor 50 has a structure in which the case 51 directly elastically holds the drive unit and does not have a structure in which an elastic member is further superimposed on the cover of the fan motor unlike the conventional fan motor. . Therefore, it is possible to reduce the size and thickness of the axial fan motor 50 as a whole while making the case 51 as thick as possible.

  FIG. 11 is a mobile phone showing a first example of an electronic apparatus using the centrifugal fan motor 1 or the axial fan motor 50 described above. The cellular phone 70 includes a housing 71 made of a hollow cubic container. A display unit 72 and an operation unit 73 are provided on one surface of the housing 71, and a control unit, a power supply unit, and the like are provided therein. The display unit 72 is configured by, for example, a liquid crystal panel, and various types of information are displayed by an operation of the operation unit 73 configured by a key switch or the like.

  The centrifugal fan motor 1 (or the axial fan motor 50) described above is housed in the housing 71 of the cellular phone 70. The centrifugal fan motor 1 is attached to a wiring board 74 configured as a part of a control unit and used as a cooling fan device. That is, the centrifugal fan motor 1 plays the role of suppressing the temperature rise of the control unit and the like by discharging the heat generated by the drive of the control unit by moving the air in the space of the housing 71 to the outside. Yes.

As described above, according to the present invention, an elastic member having an anti-vibration effect, in particular, rubber (particularly butyl rubber) can be used to achieve easy assembly, and the mounting direction is not limited during assembly. The effect of having a high degree of freedom of attachment can be obtained. Specifically, it is as follows.
1. Device downsizing and anti-vibration effect Since the case is made of an elastic member and the case is a part of the components of the fan motor, the thickness of the case is increased as much as possible to improve the anti-vibration effect and The size and thickness can be reduced.

2. High degree of freedom for mounting to electronic equipment The case is arranged to wrap around the fan motor, so that vibration generated from the drive unit can be attenuated in all directions of the X axis, Y axis and Z axis . Therefore, it is possible to mount the fan motor so as to be sandwiched from the top, bottom, left and right or front and back while securing the air inflow / outflow path when mounting to the electronic device, and can have a high degree of freedom in the mounting form.

3. Easy assembly By providing a slit in the case, the motor base on which the drive unit is mounted can be easily assembled by utilizing the fact that the case is formed of an elastic member. Furthermore, the base housing part is provided in the case, so that the drive part can be securely fixed at a predetermined position via the motor base, and the drive part is positioned at the predetermined position to prevent the drive part from being displaced. can do.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. That is, according to the present invention, it is possible to provide a fan motor that is small and thin, has a small number of parts, has good assemblability, and is low in price and high in reliability. Moreover, in the said Example, although the example applied to the mobile telephone as an electronic device was demonstrated, this invention is not limited to this. For example, the present invention can be applied to personal computers, digital cameras, video cameras, portable music players, PDAs (electronic notebooks), and the like.

  DESCRIPTION OF SYMBOLS 1 ... Centrifugal fan motor 2,52 ... Motor base, 3 ... Fixed part, 4 ... Rotating part, 5, 53 ... Fan, 6 ... Case (external case for centrifugal fan motor), 7, 62 ... Flexible substrate, 8 ... Tube bearing part 11 ... Bearing cylinder 16 ... Rotating shaft 22, 65 ... Rotating body 25 ... Intake port 26, 55 ... Slit, 27, 54 ... Exhaust port 28 ... Tongue part 29, 56 ... Base storage 50: Axial fan motor, 51: Case (external case for axial fan motor), 70: Mobile phone (fan motor mounted electronic device)

Claims (20)

Covering the entire drive part having a rotating part and a fixed part provided with a fan,
An outer case for a centrifugal fan motor, wherein an elastic member is used to form a case having an intake port for intake by the fan and an exhaust part for exhaust by the fan. The exterior case for a centrifugal fan motor according to claim 1, wherein the elastic member is rubber. The outer case for a centrifugal fan motor according to claim 1, wherein the case is integrally formed. The exterior case for a centrifugal fan motor according to claim 1, wherein a slit is provided on a surface of the case facing the intake port. The outer case for a centrifugal fan motor according to claim 1, wherein the case is provided with a base storage portion in which a motor base on which the drive unit is mounted is stored. A drive unit having a fixed part and a rotating part;
A fan provided in the rotating part;
A case that covers the entire drive unit;
The case has an intake port for intake by the fan and an exhaust port for exhaust by the fan,
A centrifugal fan motor in which the case is formed of an elastic member. The centrifugal fan motor according to claim 6, wherein the elastic member is rubber. The centrifugal fan motor according to claim 6, wherein the case is integrally formed. The centrifugal fan motor according to claim 6, wherein a slit is provided on a surface of the case facing the intake port. The centrifugal fan motor according to claim 6, wherein the case is provided with a base storage portion in which a motor base on which the drive unit is mounted is stored. Equipped with a centrifugal fan motor,
The centrifugal fan motor is
A driving portion having a fixed portion and a rotating portion; a fan provided in the rotating portion; and a case covering the entire driving portion;
The case has an intake port for intake by the fan and an exhaust port for exhaust by the fan,
An electronic device equipped with a centrifugal fan motor, wherein the case is formed of an elastic member. A motor base base housing portion on which a drive unit having a fan is mounted is provided, covers the entire drive unit, and has an intake port for intake by the fan and an exhaust port for exhaust by the fan An outer case for an axial fan motor, which is made of an elastic material. The outer case for an axial fan motor according to claim 12, wherein the elastic member is rubber. The outer case for an axial fan motor according to claim 12, wherein the case is integrally formed. The exterior case for an axial fan motor according to claim 12, wherein a slit is provided in the case to communicate the intake port and the exhaust port. A fixed part fixed to the motor base;
A rotating part rotatably supported by the fixed part;
A fan provided in the rotating part;
A case having a base storage portion of the motor base and covering the whole of the fixed portion, the rotating portion, and the fan;
The case has an intake port for intake by the fan and an exhaust port for exhaust by the fan,
An axial fan motor in which the case is formed of an elastic member. The axial fan motor according to claim 16, wherein the elastic member is rubber. The axial fan motor according to claim 16, wherein the case is integrally formed. The axial flow fan motor according to claim 16, wherein the case is provided with a slit that communicates the intake port and the exhaust port. Equipped with an axial fan motor,
The axial fan motor is
A fixed part fixed to the motor base;
A rotating part rotatably supported by the fixed part;
A fan provided in the rotating part;
A case that has a base housing portion of the motor base and covers the fixed portion, the rotating portion, and the entire fan;
The case is
An intake port for intake by the fan and an exhaust port for exhaust by the fan;
An electronic device equipped with an axial fan motor, wherein the case is formed of an elastic member.

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