JP6094324B2 - Power supply - Google Patents

Description

  The present invention relates to a power supply device in which a casing for housing a circuit board and a cooling fan are integrated.

  As this type of power supply device, a cell power supply is disclosed in Japanese Patent Laid-Open No. 2005-18314. The cell power source includes a cell power source body, an output unit and a filter unit attached to the cell power source body. The cell power source body includes an input board to which the output unit and the filter unit can be connected, and a metal case configured to accommodate the input board, the output unit, the filter unit, and the like.

  In this case, the metal case is configured to include a lower case having a U-shaped cross section to which an input board or the like is attached, and a cover that closes an upper surface side opening portion of the lower case. In this cell power source, a fan is attached to the lower case of the metal case. Thereby, in this cell power supply, it is possible to cool the input board, the output unit, the filter unit, and the like in the case by introducing outside air into the case by the fan.

Japanese Patent Laying-Open No. 2005-18314 (page 4-7, FIG. 1-14)

  However, the conventional cell power supply has the following problems to be solved. That is, in the conventional cell power supply, an input board, an output unit, a filter unit, etc. are accommodated in a metal case composed of a lower case and a cover, and a fan for introducing outside air is attached to the lower case in the metal case. It has been. In this case, in the conventional cell power supply, the fan is fixed to the lower case by the male screw for fixing the fan, and the cover is attached to the screw hole (round hole through which the male screw can be inserted) formed in the lower case. The cover is fixed to the lower case by tightening (screwing) the male screw to the female screw formed on the cover.

  Therefore, in the conventional cell power supply, the number of male screws necessary for integrating the lower case, the cover, and the fan is large, resulting in an increase in manufacturing cost (component cost). There is a point. In addition, the conventional cell power source has a problem that the number of male screw tightening operations during manufacturing is large, and the manufacturing cost is increased due to this.

  The present invention has been made in view of such problems, and a main object of the present invention is to provide a power supply device capable of reducing the manufacturing cost.

  In order to achieve the above object, a power supply device according to the present invention is integrated with a circuit board on which electronic components are mounted, a first casing constituent member to which the circuit board is attached, and the first casing constituent member. A casing having a second casing component that forms a housing space for housing the circuit board, and a cooling fan that performs either introduction of outside air into the casing or discharge of air in the casing. The relative movement of the cooling fan relative to the first casing constituent member is restricted without restricting the relative movement of the second casing constituent member relative to the first casing constituent member. The first casing component and the cooling fan are fixed to each other by a first fixing member, and the first casing component The first casing component, the second casing component, and the cooling fan are second fixing members so that relative movement between the second casing component and the cooling fan is restricted. Are fixed to each other.

  In the power supply device according to the present invention, the cooling fan is allowed to pass through the threaded portion of the first male screw serving as the first fixing member, and the head portion of the first male screw is restricted from being inserted. And a second insertion portion that allows the insertion of the screw portion of the second male screw as the second fixing member and restricts the insertion of the head portion of the second male screw. A first female thread portion formed in the first casing component member and provided with a female thread so as to be able to fasten a thread portion of the first male screw through which the first insertion portion is inserted; A third insertion portion that allows insertion of the screw portion in the male screw and restricts insertion of the head portion in the second male screw is formed, and the second casing component member includes the second insertion portion. The third insertion portion and the third insertion portion Fastenable to the internal thread of the threaded portion is a second female screw portion provided are formed in the second external thread.

  In the power supply device according to the present invention, the cooling fan is allowed to pass through the threaded portion of the first male screw as the first fixing member, and restricts the head portion from passing through the first male screw. A first insertion portion and a second insertion portion that allows the insertion of the screw portion in the second male screw as the second fixing member and restricts the insertion of the head portion in the second male screw are formed. The first casing component member includes a first female thread portion provided with a female screw so that a thread portion of the first male screw through which the first insertion portion is inserted can be fastened, and the second A second female screw portion provided with a female screw so that the screw portion of the second male screw through which the insertion portion is inserted can be fastened is formed, and the second casing component member has a screw in the second male screw. Part insertion and The third insertion portion for restricting the insertion of the head is formed in the second male thread.

  Furthermore, in the power supply device according to the present invention, the casing includes the engaging claw portion formed on one of the first casing constituent member and the second casing constituent member, and the engaging claw portion. An engaging portion formed by an engaging opening formed in the other of the first casing constituent member and the second casing constituent member is formed so that they can be combined.

  According to the power supply device of the present invention, the relative movement of the cooling fan relative to the first casing constituent member is restricted without restricting the relative movement of the second casing constituent member relative to the first casing constituent member. The first casing component member and the cooling fan are fixed to each other by the first fixing member, and the first casing component member, the second casing component member, and the cooling fan are moved relative to each other. The first casing component member, the second casing component member, and the cooling fan are fixed to each other by the second fixing member so that the first casing component member and the cooling fan are assembled together. The first casing is fixed before the second casing component is fixed by fixing the two casings together. The situation where the cooling fan falls off from the component member can be preferably avoided, and the first casing component member, the second casing component member and the cooling fan are fixed to each other by the second fixing member and integrated with each other. Therefore, the manufacturing cost (component cost) can be sufficiently reduced to the extent that it is not necessary to separately prepare a screw for fixing the second casing component to the first casing component. Further, the first casing constituent member, the first casing constituent member, the first casing constituent member, the first casing constituent member, the first casing constituent member, and the screw for fixing the second casing constituent member to the first casing constituent member are separately provided. The manufacturing cost can be further reduced by the smaller number of screw tightening operations required to integrate the two casing constituent members and the cooling fan.

  Further, according to the power supply device of the present invention, the first female screw provided with the female screw so that the screw portion of the first male screw as the first fixing member through which the first insertion portion of the cooling fan is inserted can be fastened. And a third insertion portion that allows insertion of the screw portion in the second male screw as the second fixing member and restricts insertion of the head portion in the second male screw as the first casing component member A second female screw portion provided with a female screw so as to be able to fasten a screw portion in a second male screw formed through the third insertion portion in the first casing component and the second insertion portion in the cooling fan. Is formed in the second casing component member, for example, an insertion hole is provided in place of the female screw in the first female screw portion and the second female screw portion, and the first male screw and the second screw are formed on the back side of both female screw portions. The male In comparison with a structure in which the tightening of the nut, the pressing with the nut only unnecessary min can be tightened both male thread easily. Moreover, since the cost of forming the female thread in both the female thread portions is lower than the part cost of the nut, the manufacturing cost can be further reduced.

  Further, according to the power supply device of the present invention, the first female screw provided with the female screw so that the screw portion of the first male screw as the first fixing member through which the first insertion portion of the cooling fan is inserted can be fastened. And a second female screw part provided with a female screw so that a screw part of a second male screw as a second fixing member through which the second insertion part of the cooling fan is inserted can be fastened. And forming a third insertion portion in the second casing component member that allows insertion of the screw portion in the second male screw and restricts insertion of the head portion in the second male screw, for example, The first female screw portion and the second female screw portion are provided with an insertion hole instead of the female screw, and compared with a configuration in which the nut is tightened on the first male screw or the second male screw on the back side of both female screw portions. With presser foot Only unnecessary min, can be tightened both male thread easily. Moreover, since the cost of forming the female thread in both the female thread portions is lower than the part cost of the nut, the manufacturing cost can be further reduced.

  According to the power supply device of the present invention, the engaging claw portion formed on one of the first casing component member and the second casing component member and the engagement claw portion can be engaged with each other. By forming an engaging portion formed of an engaging opening formed on the other of the casing constituent member and the second casing constituent member in the casing, the first casing constituent member and the second casing constituent member are Since the number of screws used can be reduced by the number of portions engaged by the engaging portion as compared with the configuration of screwing, the manufacturing cost of the power supply device can be further reduced.

It is the external appearance perspective view which looked at the power supply device 1 from the back side. 1 is a cross-sectional view of a power supply device 1. FIG. 1 is an exploded perspective view of a power supply device 1. FIG. 1 is a perspective view of a state where a circuit board 3 and a cooling fan 4 are attached to a chassis 10. FIG. It is sectional drawing for demonstrating the procedure which engages claw part 22a, 12b for engagement with the edge part of opening part 14a, 23a for engagement. It is other sectional drawing for demonstrating the procedure of engaging claw part 22a, 12b for engagement with the opening edge part of the opening parts 14a, 23a for engagement. It is sectional drawing which shows the state which engagement of the nail | claw parts 22a and 12b for engagement with the opening edge part of the openings 14a and 23a for engagement completed. FIG. 3 is a perspective view of a state where a cover 20 is attached to the chassis 10. It is sectional drawing of 1 A of power supply devices. It is the external appearance perspective view which looked at the power supply device 1B from the back side. It is sectional drawing of the power supply device 1B. It is a disassembled perspective view of the power supply device 1B.

  Hereinafter, embodiments of a power supply device will be described with reference to the accompanying drawings.

  The power supply device 1 illustrated in FIGS. 1 and 2 is an example of a “power supply device” and includes a casing 2, a circuit board 3, and a cooling fan 4. In this case, the circuit board 3 is housed in the casing 2 on which various electronic components and connectors for connecting power input / output terminals are mounted. In each drawing referred to in this specification, illustration of an electronic component, a connector for connection, and the like mounted on the circuit board 3 is omitted.

  Moreover, the cooling fan 4 is comprised by the axial flow type fan as an example, and is integrated with the casing 2 by the external threads 5a-5c so that introduction of the external air into the casing 2 can be performed as described later. Yes. As shown in FIG. 3, the cooling fan 4 is formed with insertion holes 4 a to 4 d that allow the threaded portion of the fixing male screw to be inserted and restrict the insertion of the head portion of the male screw.

  In this case, in the power supply device 1 of this example, the male screws 5a and 5b correspond to "first male screws as first fixing members", and the insertion holes 4a and 4c through which the screw portions of the male screws 5a and 5b are inserted. Corresponds to the “first insertion portion”, the male screw 5 c corresponds to the “second male screw as the second fixing member”, and the insertion hole 4 d through which the screw portion of the male screw 5 c is inserted is “the second insertion screw”. Corresponding to “insertion part”. Moreover, in the power supply device 1 of this example, the insertion hole 4b is unused.

  Instead of the cooling fan 4 in which the insertion holes 4a to 4d are formed, notches (screw insertion grooves: “first insertion” that can insert male screws 5a to 5c and the like in the direction along the rotation axis of the impeller. A fan (not shown) in which the “portion” and the “second insertion portion” are formed) may be employed as the “cooling fan”. Moreover, it can replace with said structure and the cooling fan 4 can also be integrated with the casing 2 so that discharge | emission of the air in the casing 2 is executable. Further, instead of the axial flow type fan, a centrifugal type fan or a mixed flow type fan may be employed as the “cooling fan” (not shown).

  On the other hand, as shown in FIGS. 1 to 3, the casing 2 includes a chassis 10 to which the circuit board 3 is attached, and a cover 20 that is integrated with the chassis 10 and forms an accommodation space for accommodating the circuit board 3. ing. The power supply device 1 is configured such that a front side portion (not shown) of the casing 2 is opened, and a power cable can be connected to a connection connector mounted on the circuit board 3 at the opening portion. Has been.

  The chassis 10 corresponds to a “first casing component”, and, as an example, by pressing a galvanized steel plate, as shown in FIG. 13 and the contact piece 14 are integrally formed. In this case, the bottom plate 11 is formed with an internal thread portion 11a (an example of a “first internal thread portion”) in which an internal thread is formed so that the thread portion of the external thread 5b inserted through the insertion hole 4c of the cooling fan 4 can be tightened. ing. The left side plate 12 has an internal thread portion 12a (another example of the “first internal thread portion”) in which an internal thread is formed so that the thread portion of the external thread 5a inserted through the insertion hole 4a of the cooling fan 4 can be tightened. As will be described later, there is an engaging claw portion 12b (an example of an “engaging claw portion”) whose front end portion protrudes toward the front side so as to be engageable with an engaging opening 23a provided in the cover 20. Is formed.

  Further, the back plate 13 has an insertion hole 13a (an example of a “third insertion portion”) that allows insertion of the screw portion of the male screw 5c and restricts insertion of the head portion of the male screw 5c, and male screws 5a, 5b. Are formed in the insertion holes 4a and 4c of the cooling fan 4, and an opening 13d for allowing the cooling fan 4 to introduce outside air into the casing 2 is formed. Further, the contact piece 14 is a long strip-shaped piece arranged to face the left side plate 12, and the contact piece 14 has an engaging claw portion 22 a provided on the cover 20 as will be described later. A mating engagement opening 14a (an example of an “engagement opening”) is formed.

  The cover 20 corresponds to a “second casing constituent member”. For example, the top plate 21, the right side plate 22, and the contact pieces 23 and 24 are integrated by pressing a galvanized steel plate. Is formed. In this case, the top plate 21 has a female screw portion 21a (in which a female screw is formed so that the screw portion of the male screw 5c through which the insertion hole 13a in the back plate 13 of the chassis 10 and the insertion hole 4d of the cooling fan 4 are inserted can be fastened. An example of a “second female thread portion” is formed. Further, as described above, the right side plate 22 has a front end projecting toward the rear side so as to be engageable with the lip of the engaging opening 14a formed in the contact piece 14 of the chassis 10. The combination claw portion 22a (another example of the “engagement claw portion”) is formed.

  Further, the contact piece 23 is a long strip-shaped piece that is disposed to face the right side plate 22 so as to be able to come into contact with the left side plate 12 in the chassis 10. The contact piece 23 includes the chassis 10 as described above. An engaging opening 23a (another example of the “engaging opening”) that can engage with the engaging claw 12b formed on the left side plate 12 is formed. The contact piece 24 is formed in a long band shape so as to be able to contact the back plate 13 in the chassis 10.

  In this case, in the casing 2 in the power supply device 1 of the present example, the engagement claw portion 12b of the chassis 10 and the engagement opening portion 23a of the cover 20 are combined to form one “engagement portion”. The engagement opening portion 14a and the engagement claw portion 22a of the cover 20 are combined to form another “engagement portion”. In FIG. 3 and the like, only two sets of “engagement portions” are illustrated, but a plurality of “engagement portions (engagement claw portions 12b, 12b, 22a and engaging openings 14a, 23a) ".

  When assembling the power supply device 1, first, the circuit board 3 on which mounting of electronic components and the like is completed is attached to the chassis 10. Next, as shown in FIG. 4, the cooling fan 4 is attached to the chassis 10. Specifically, first, the cooling fan 4 is placed on the bottom plate 11 in accordance with the opening 13 d formed in the back plate 13. Subsequently, the screw portion of the male screw 5a is inserted into the insertion hole 4a of the cooling fan 4 exposed from the notch 13b formed in the back plate 13 and tightened (screwed) into the female screw of the female screw portion 12a. The threaded portion of the male screw 5b is inserted into the insertion hole 4c exposed from 13c and tightened (screwed) to the female screw of the female threaded portion 11a. As a result, the relative movement of the cover 20 that is not attached to the chassis 10 is not restricted at this time, and the relative movement of the cooling fan 4 with respect to the chassis 10 is restricted by the male screws 5a and 5b. It becomes a state.

  Next, the cover 20 is attached. Specifically, by positioning the cover 20 closer to the right front side of the chassis 10 where the circuit board 3 and the cooling fan 4 are completely attached, as shown in FIG. And the engagement opening 23a in the cover 20 are aligned in the lateral width direction of the casing 2 (left and right direction in the figure), and the engagement opening 14a in the chassis 10 and the tip of the engagement claw portion 22a in the cover 20 Are matched in the width direction of the casing 2. Next, the cover 20 is moved with respect to the chassis 10 in the direction of arrow A (rightward when viewed from the rear side: leftward when viewed from the front side), and as shown in FIG. 6, the engagement openings 23a and 14a are engaged. The tip portions of the claw portions 12b and 22a are inserted. At this time, the contact piece 23 of the cover 20 is in contact with the inner surface of the upper side of the left side plate 12 of the chassis 10.

  Subsequently, the cover 20 is moved with respect to the chassis 10 in the direction of the arrow B (the direction toward the back side), and as shown in FIG. 7, the engaging claws 12b are formed at the mouth edges of the engaging openings 23a and 14a. , 22a are engaged. At this time, the contact piece 24 of the cover 20 is in contact with the inner surface of the upper surface of the rear plate 13 of the chassis 10. As a result, the movement of the cover 20 with respect to the chassis 10 in the up / down / left / right direction and the back direction is restricted.

  Next, as shown in FIG. 8, the screw portion of the male screw 5 c is inserted into the insertion hole 13 a in the chassis 10 and the insertion hole 4 d in the cooling fan 4, and tightened (screwed) into the female screw of the female screw portion 21 a in the cover 20. As a result, the relative movement of the cover 20 with respect to the chassis 10, the relative movement of the cooling fan 4 with respect to the chassis 10, and the relative movement of the cooling fan 4 with respect to the cover 20 are restricted by the male screw 5 c. The cover 20 and the cooling fan 4 are integrated. Thus, the assembly of the power supply device 1 is completed.

  As described above, according to the power supply device 1, the chassis 10 and the cooling fan are controlled such that the relative movement of the cooling fan 4 with respect to the chassis 10 is restricted without restricting the relative movement of the cover 20 with respect to the chassis 10. 4 is fixed to each other by male screws 5a and 5b, and the chassis 10, cover 20 and cooling fan 4 are mutually connected by male screws 5c so that relative movement among the chassis 10, cover 20 and cooling fan 4 is restricted. By fixing the chassis 10 and the cooling fan 4 to each other with the male screws 5a and 5b during assembly, it is possible to preferably avoid the situation where the cooling fan 4 falls off the chassis 10 before the cover 20 is attached. Further, the chassis 10, the cover 20, and the cooling fan 4 are connected by a male screw 5c. Since they can be fixed to each other and integrated with each other, the manufacturing cost (component cost) can be sufficiently reduced to the extent that there is no need to separately prepare a screw for fixing the cover 20 to the chassis 10. . Further, in order to integrate the chassis 10, the cover 20, and the cooling fan 4 as compared with the configuration in which the screw for fixing the cooling fan 4 and the screw for fixing the cover 20 to the chassis 10 are separately provided. The manufacturing cost can be further reduced by the amount of screw tightening operations required.

  Moreover, according to this power supply device 1, the internal thread part 12a, 11a which provided the internal thread so that the thread part in the external thread 5a, 5b which penetrated the insertion holes 4a, 4c in the cooling fan 4 can be fastened, and the thread part in the external thread 5c The male screw 5c is formed in the chassis 10 with an insertion hole 13a that allows the insertion of the male screw 5c and restricts the insertion of the head of the male screw 5c, and the insertion hole 13a in the chassis 10 and the insertion hole 4d in the cooling fan 4 are inserted. For example, instead of the female screw, the female screw portion 12a, 11a, 21a is provided with an insertion hole so that the female screw portion 12a, 21a, 21a can be fastened. Compared to the configuration in which the nuts are tightened to the male screws 5a to 5c on the back side, the amount of pressing of the nuts is unnecessary, The screw 5a~5c can be easily tightened. Moreover, since the cost of forming the internal thread on the internal thread portions 12a, 11a, and 21a is lower than the cost of the nut parts, the manufacturing cost can be further reduced.

  Further, according to the power supply device 1, an “engagement portion” including an engagement claw portion 12 b formed in the chassis 10 and an engagement opening portion 23 a formed in the cover 20 so that the engagement claw portion 12 b can be engaged. By forming the engagement claw portion 22a formed in the cover 20 and the "engagement portion" formed of the engagement opening 14a formed in the chassis 10 so that the engagement claw portion 22a can be engaged with the casing 2, Compared with the configuration in which the chassis 10 and the cover 20 are screwed, the number of screws used can be reduced by the number of portions engaged by the “engagement portion”, so that the manufacturing cost of the power supply device 1 can be reduced. Further reduction can be achieved.

  The configuration of the “power supply device” is not limited to the configuration of the power supply device 1 described above. For example, instead of the configuration of the power supply device 1 described above, the cooling fan 4 is attached to the chassis 10a by male screws 5a and 5b (only the male screw 5b is shown in the figure) as in the power supply device 1A shown in FIG. In addition to fixing, the cover 20 is fixed to the cooling fan 4 with the male screw 5 c, so that the relative movement of the cover 20 with respect to the chassis 10 via the cooling fan 4 can be adopted. In the power supply device 1A shown in the figure, components having the same functions as those of the power supply device 1 described above are denoted by the same reference numerals and redundant description is omitted.

  In this case, the power supply device 1A is another example of the “power supply device”, and includes a chassis 10a instead of the chassis 10 in the casing 2 of the power supply device 1, and the casing 2a is configured. The chassis 10a is another example of the “first casing component”, and is similar to the chassis 10 except that a notch 13c is formed instead of the insertion hole 13a in the chassis 10 described above. Is formed. In this power supply device 1A, the insertion holes 4a and 4c in the cooling fan 4 correspond to the “insertion part A”, and the insertion hole 4d in the cooling fan 4 corresponds to the “insertion part B”. In the power supply device 1A, the male screws 5a and 5b correspond to “male screw A as the fixing member A”, the male screw 5c corresponds to “male screw B as the fixing member B”, and the female screw portion 12a of the chassis 10a. , 11a corresponds to the “female screw part A”, and the female screw part 21a of the cover 20 corresponds to the “female screw part B”.

  According to this power supply device 1A, the male screw 5a is connected to the chassis 10a and the cooling fan 4 so that the relative movement of the cooling fan 4 with respect to the chassis 10a is restricted without restricting the relative movement of the cover 20 with respect to the chassis 10a. , 5b and the chassis 10a and the cover 20 are externally threaded so that the relative movement of the cooling fan 4 with respect to the cover 20 is restricted without restricting the relative movement of the cover 20 with respect to the chassis 10a. By fixing together, the cooling fan 4 and the chassis 10a are fixed to each other with the male screws 5a and 5b at the time of assembly, so that the situation where the cooling fan 4 falls off from the chassis 10a before the cover 20 is attached is preferably avoided. And after that, the cover 20 and the cooling fan Since the chassis 10a and the cover 20 can be integrated via the cooling fan 4 by fixing 4 to each other with the male screw 5c, there is no need to separately prepare a screw for fixing the cover 20 to the chassis 10a. The manufacturing cost (component cost) can be sufficiently reduced by that amount. In addition, in order to integrate the chassis 10a, the cover 20, and the cooling fan 4 as compared with a configuration in which a screw for fixing the cooling fan 4 and a screw for fixing the cover 20 to the chassis 10a are separately provided. The manufacturing cost can be further reduced by the amount of screw tightening operations required.

  Further, according to the power supply device 1A, the female screw portions 12a and 11a provided with the female screws are formed in the chassis 10a so that the screw portions of the male screws 5a and 5b through which the insertion holes 4a and 4c of the cooling fan 4 are inserted can be fastened. By forming the female screw portion 21a provided with the female screw so that the screw portion of the male screw 5c through which the insertion hole 4d of the cooling fan 4 is inserted into the cover 20 can be fastened, for example, the female screw portion 12a, 11a, 21a is used instead of the female screw. Compared with the configuration in which a through hole is provided and the nut is fastened to the male screws 5a to 5c on the back side of the female screw portions 12a, 11a, and 21a, the male screws 5a to 5c are easily tightened by the amount that does not require pressing of the nut. Can do. Moreover, since the cost of forming the internal thread on the internal thread portions 12a, 11a, and 21a is lower than the cost of the nut parts, the manufacturing cost can be further reduced.

  On the other hand, the power supply device 1B illustrated in FIGS. 10 to 12 is still another example of the “power supply device”, and instead of the casing 2 including the chassis 10 and the cover 20 in the power supply device 1 described above, the chassis 10b and the cover 20b. It comprises the casing 2b which consists of. In addition, in this power supply device 1B, about the component which has a function similar to said power supply device 1 and 1A, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  The chassis 10b is another example of the “first casing constituent member”, and in addition to the female screw portion 11a described above, a screw of a male screw 5b through which the insertion hole 4b of the cooling fan 4 is inserted in the bottom plate 11 thereof. An internal thread portion 11b (another example of the “first internal thread portion”) in which an internal thread is formed so that the portion can be tightened is formed. Further, the left side plate 12 of the chassis 10b has an engaging claw portion 12c ("engaging claw portion") whose front end portion protrudes toward the back side instead of the engaging claw portion 12b in the chassis 10, 10a. Another example) is formed.

  Further, the rear plate 13 of the chassis 10b is not formed with an insertion hole 13a of the chassis 10 in the casing 2 of the power supply device 1 or a notch 13c on the upper side of the chassis 10a in the casing 2a of the power supply device 1A. Thus, an insertion hole 13e is formed at the position where the notch 13b is formed in the chassis 10 to allow the threaded portion of the male screw 5a to pass therethrough and restrict the insertion of the head portion of the male screw 5b. A notch 13f is formed for insertion into the insertion hole 4b. Furthermore, the female screw portion 12a in the chassis 10b is configured to be capable of tightening the screw portion in the male screw 5a and functions as a “second female screw portion”.

  The cover 20b is another example of the “second casing constituent member”, and the top plate 21 is not formed with the female screw portion 21a, and the right side plate 22 of the cover 20b is covered with the cover 20. In place of the engaging claw portion 22a, an engaging claw portion 22b (another example of the “engaging claw portion”) having a tip portion projected toward the front side is formed. Further, the contact piece 24 of the cover 20b is formed with an insertion hole 24a (an example of a “third insertion portion”) that allows insertion of the screw portion of the male screw 5a and restricts insertion of the head portion of the male screw 5a. Has been.

  In this case, in the power supply device 1B, the insertion holes 4b and 4c in the cooling fan 4 correspond to the “first insertion part”, and the insertion hole 4a in the cooling fan 4 corresponds to the “second insertion part”. The insertion hole 4d in the cooling fan 4 is unused. In the power supply device 1B, the male screws 5b and 5c correspond to “first male screws as first fixing members”, and the male screws 5a correspond to “second male screws as second fixing members”. .

  When assembling the power supply device 1B, the cooling fan 4 is attached to the chassis 10b to which the circuit board 3 is attached. Specifically, after the cooling fan 4 is placed on the bottom plate 11, the screw portions of the male screws 5 b and 5 c are inserted into the insertion holes 4 b and 4 c of the cooling fan 4 from the notches 13 f and 13 c of the back plate 13. Tighten (screw into) the female threads of the female thread portions 11b and 11a. As a result, the relative movement of the cooling fan 4 with respect to the chassis 10b is restricted by the male screws 5b and 5c without restricting the relative movement of the cover 20b not attached to the chassis 10b at this time. It becomes a state.

  Next, the cover 20b is positioned closer to the right rear surface of the chassis 10b, the front end of the engaging claw 12c in the chassis 10b and the engaging opening 23a in the cover 20b are aligned in the lateral width direction of the casing 2b, and the chassis 10b The engagement opening 14a in the cover 20b is aligned with the tip of the engagement claw 22b in the cover 20b in the lateral width direction of the casing 2b. Subsequently, the cover 20b is moved leftward toward the front with respect to the chassis 10b, and the leading ends of the engaging claws 12c and 22b are inserted into the engaging openings 23a and 14a. At this time, the contact piece 23 of the cover 20b is in contact with the upper edge side inner surface of the left side plate 12 of the chassis 10b.

  Subsequently, the cover 20b is moved toward the front side with respect to the chassis 10b, and the front ends of the engaging claws 12c and 22b are engaged with the edge portions of the engaging openings 23a and 14a. At this time, the contact piece 24 of the cover 20b comes into contact with the outer surface on the upper edge side of the back plate 13 of the chassis 10b. Thereby, the movement of the cover 20b with respect to the chassis 10b in the vertical and horizontal directions and the back direction is restricted.

  Next, the screw portion of the male screw 5a is inserted into the insertion hole 24a in the cover 20b, the insertion hole 13e in the chassis 10b, and the insertion hole 4a in the cooling fan 4, and tightened (screwed) into the female screw of the female screw portion 12a in the chassis 10b. As a result, the relative movement of the cover 20b with respect to the chassis 10b, the relative movement of the cooling fan 4 with respect to the chassis 10b, and the relative movement of the cooling fan 4 with respect to the cover 20b are regulated by the male screw 5a. The cover 20b and the cooling fan 4 are integrated. Thus, the assembly of the power supply device 1B is completed.

  Thus, according to this power supply device 1B, the internal threads 5b, 5c through which the insertion holes 4b, 4c of the cooling fan 4 are inserted, the internal threads 11b, 11a provided with internal threads so that the internal threads can be fastened, and the cooling fan 4 In the chassis 10b, a female screw portion 12a provided with a female screw so that the screw portion of the male screw 5a through which the male screw 5a is inserted can be fastened is formed, and the screw portion of the male screw 5a is allowed to pass through, and the head of the male screw 5a By forming the insertion hole 24a in the cover 20b for restricting the insertion of the female screw, for example, an insertion hole is provided in the female screw portions 12a, 11a, and 11b instead of the female screw, and the male screw 5a to the female screw portions 12a, 11a, and 11b are provided on the back surface side. Compared with the configuration in which the nut is tightened to 5c, the male screws 5a to 5c are easily tightened by the amount that does not require the nut to be pressed. You can kick it. Moreover, since the cost of forming the internal thread on the internal thread portions 12a, 11a, and 11b is low compared to the part cost of the nut, the manufacturing cost can be further reduced.

  Further, the casing having a configuration in which the relative movement of the cooling fan 4 with respect to the chassis 10 and 10a is restricted by the two male screws 5a and 5b (a configuration in which two “first fixing members” and “fixing members A” are present). Configuration in which relative movement of cooling fan 4 with respect to chassis 10b is restricted by two chassis 10 and 10A provided with 2 and 2a and male screws 5b and 5c (configuration in which two “first fixing members” exist) The chassis 10b including the casing 2b has been described as an example, but it is sufficient that at least one “first fixing member” or “fixing member” exists. Further, the configuration in which the cooling fan 4 is integrated with the casings 2, 2 a, 2 b so as to be accommodated in the casings 2, 2 a, 2 b has been described as an example, but the outside of the “casing” (the outer surface side of the back plate) It is also possible to adopt a configuration in which a “cooling fan” is attached to the bracket (not shown).

  Further, the configuration in which the “screw portion of the male screw” is screwed into the “female screw of the female screw portion” has been described as an example, but “first fixing member”, “second fixing member”, “fixing member A” and “ As the “fixing member B”, a tapping screw (a tapping screw: a male screw in which a female screw is formed at a screwed portion by screwing) is employed, and these are screwed into an “insertion hole” of a “cooling fan”, thereby “first casing configuration” A configuration in which the “member”, the “second casing constituent member”, and the “cooling fan” are integrated can also be adopted (an example of a configuration in which the “internal thread portion” does not exist: not shown). Furthermore, the “fixing member” is not limited to a fastening body such as a screw (screw, bolt), and various fixing tools such as an anchor bolt (driving type anchor bolt and a fastening type anchor bolt) and a cotter pin (split pin) can be used. It is also possible to adopt a configuration that is adopted as a “fixing member” and fixes the objects to each other.

DESCRIPTION OF SYMBOLS 1,1A, 1B Power supply device 2,2a, 2b Casing 3 Circuit board 4 Cooling fan 4a-4d, 13a, 13e, 24a Insertion hole 5a-5c Male screw 10, 10a, 10b Chassis 11 Bottom plate 11a, 11b, 12a, 21a Female screw Part 12 Left side plate 12b, 12c, 22a, 22b Engaging claw part 13 Back plate 13b, 13c, 13f Notch 13d Opening part 14, 23, 24 Abutting piece 14a, 23a Engaging opening part 20, 20b Cover 21 Top plate 22 Right side plate

Claims (4)

A circuit board on which electronic components are mounted;
A casing having a first casing component to which the circuit board is attached, and a second casing component that is integrated with the first casing component and forms an accommodation space for accommodating the circuit board;
A cooling fan that performs either introduction of outside air into the casing and discharge of air in the casing,
The relative movement of the cooling fan relative to the first casing constituent member is restricted without restricting the relative movement of the second casing constituent member relative to the first casing constituent member. One casing component and the cooling fan are fixed to each other by a first fixing member;
The first casing component, the second casing component, and the first casing component, the second casing component, and the cooling fan are regulated so that relative movement between the first casing component, the second casing component, and the cooling fan is restricted. A power supply apparatus in which cooling fans are fixed to each other by a second fixing member. The cooling fan allows the insertion of the threaded portion of the first male screw as the first fixing member, and restricts the insertion of the head portion of the first male screw, and the first A second insertion portion that allows insertion of the screw portion in the second male screw as the fixing member of 2 and restricts insertion of the head portion in the second male screw is formed,
In the first casing component member, a first female screw portion provided with a female screw so that a screw portion in the first male screw through which the first insertion portion is inserted can be fastened, and in the second male screw A third insertion portion that allows insertion of the screw portion and restricts insertion of the head portion of the second male screw; and
The second casing component member has a second female screw portion provided with a female screw so that a screw portion of the second male screw through which the second insertion portion and the third insertion portion are inserted can be fastened. The power supply device according to claim 1 formed. The cooling fan allows the insertion of the threaded portion of the first male screw as the first fixing member, and restricts the insertion of the head portion of the first male screw, and the first A second insertion portion that allows insertion of the screw portion in the second male screw as the fixing member of 2 and restricts insertion of the head portion in the second male screw is formed,
The first casing component member includes a first female screw portion provided with a female screw so that a screw portion of the first male screw through which the first insertion portion is inserted can be fastened, and the second insertion portion. A second female screw portion provided with a female screw so as to be able to fasten a screw portion in the second male screw through which is inserted,
The third casing component member is formed with a third insertion portion that allows insertion of a screw portion in the second male screw and restricts insertion of a head portion in the second male screw. The power supply device according to 1. The casing has an engaging claw portion formed on one of the first casing component member and the second casing component member, and the first casing configuration so that the engagement claw portion can be engaged with the casing. The power supply device according to any one of claims 1 to 3 , wherein an engaging portion is formed including an engaging opening formed on the other of the member and the second casing constituent member.

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