JP2012188089A - Mounting structure for part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To compactify a mounting structure for mounting a part on a body to be mounted by rotatably operating the part.SOLUTION: An electrical part 20 includes an elastic piece 38 which projects and elastically deforms in the radial direction of an insertion hole 11, and an engagement claw 26 projecting inward of a duct 10. An engagement projection 17 engaged with the elastic piece 38 from one side in the rotating direction of the rotatable operation and the edge 13a of a claw insertion hole 13 engaged with the engagement claw 26 from the other side in the rotating direction are provided around the insertion hole 11 of the duct 10. The engagement projection 17 is disposed so as to be brought into contact with the elastic piece 38 by rotatably operating the electrical part 20 to elastically deform the elastic piece, and to displace the elastic piece 38 in the recovering direction when the amount of rotation of the electrical part 20 reaches a predetermined amount so as to be engaged with the elastic piece 38 from one side in the rotating direction.

Description

  The present invention relates to a component mounting structure configured to be mounted on a mounting body by rotating the component.

  2. Description of the Related Art Conventionally, for example, a vehicle air conditioner has been provided with a resistor for controlling a blower, and as a structure for attaching this resistor to a case of an air conditioner, a structure in which a resistor is rotated and attached is known. (For example, refer to Patent Document 1).

  On the substrate of the resistor of Patent Document 1, an engaging claw portion that protrudes outward from the substrate is formed. On the other hand, an insertion hole into which a resistor is inserted is formed in the case. Further, around the insertion hole on the outer surface of the case, a flexure piece that the engaging claw portion of the resistor contacts and bends, and a stop piece for stopping the rotation of the resistor are projected to the outside of the case. Is formed.

  And when attaching the resistor to the case, after inserting the resistor into the insertion hole of the case, the engaging claw portion of the resistor comes into contact with the bending piece of the case and the bending piece is The claw portion for bending and overcoming the bending piece comes into contact with the stopping piece and stops. At this time, the shape of the bent piece is restored, and the engaging piece of the resistor is positioned between the bent piece and the stop piece, so that the resistor does not rotate in both directions and is attached to the case.

  Further, in Patent Document 1, as a mounting structure different from the above, a locking claw portion extending outward is formed on the peripheral edge portion of the motor, while a protruding piece is formed around the insertion hole on the outer surface of the case. A structure is disclosed that forms. The claw portion for locking the motor is formed so as to bend inward and outward of the case. The protruding piece of the case is formed with an inclined surface for deflecting the claw portion for locking the motor to the outside of the case and a stop piece for stopping the rotation of the motor itself.

  And when attaching the motor to the case, after inserting the motor into the insertion hole of the case, the claw part for locking the motor comes into contact with the inclined surface of the protruding piece of the case and is locked. The claw portion bends, gets over the inclined surface, contacts the stop piece, and stops. At this time, the shape of the latching claw portion is restored and positioned between the inclined surface and the stop piece, and the motor is attached to the case.

JP-A-9-267621

  By the way, in the attachment structure of the resistor of patent document 1, a bending piece is provided in the outer surface of a case, and it bends a bending piece at the time of attachment of a resistor. If the length of the flexure piece is short, the force applied to the base end of the flexure piece will increase even if the amount of displacement on the tip side is the same, so to prevent damage to the flexure piece, the length of the flexure piece should be increased. Must. In other words, the degree of protrusion of the flexure piece from the outer surface of the case is increased, and the degree of protrusion of the stop piece to the outside of the case is correspondingly increased, which leads to an increase in the size of the mounting structure.

  Further, in the motor mounting structure disclosed in Patent Document 1, the claw portion for locking the motor is bent toward the outside of the case. Also in this case, if the locking claw is short, the force applied to the base end increases, so it must be lengthened. Furthermore, since the locking claw is bent by the inclined surface provided on the outer surface of the case, the locking claw must be formed long and floated outward from the outer surface of the case. Increases the size of the structure.

  When the component mounting structure is enlarged, the degree of freedom in layout of other peripheral components becomes low, which causes a problem.

  The present invention has been made in view of such a point, and an object of the present invention is to make a mounting structure compactly mounted on a mounting body by rotating a component.

  In order to achieve the above object, according to the present invention, the component is provided with an elastically deforming portion that elastically deforms in the radial direction of the insertion hole and an engaging claw that protrudes inward of the mounting body, A first engagement portion that engages with the elastic deformation portion from one side in the direction and a second engagement portion that engages with the engagement claw from the other side are provided.

  According to a first aspect of the present invention, there is provided a component mounting structure in which a component is inserted into the insertion hole of the mounting body and rotated around the center line of the insertion hole to be mounted on the mounting body. Is provided with an elastically deforming portion that protrudes in the radial direction of the insertion hole and elastically deforms in the radial direction, and an engaging claw that protrudes inward of the mounting body. Around, a first engagement portion that engages with the elastic deformation portion from one side in the rotation direction during the rotation operation, and a second engagement portion that engages with the engagement claw from the other side in the rotation direction And the first engaging portion contacts the elastic deformation portion by rotating the component, elastically deforms the elastic deformation portion in the radial direction of the insertion hole, and rotates the component. When the operation amount reaches a predetermined amount, displace the elastic deformation part in the restoring direction and It arrange | positions so that it may engage with an elastic deformation part, and the said 2nd engaging part is engaged with the said engaging claw from the rotation direction other side when the amount of rotation operation of the said component turns into predetermined amount. It is characterized by being arranged.

  According to this configuration, since the elastic deformation portion of the component protrudes in the radial direction of the insertion hole, the length of the elastic deformation portion is ensured without increasing the degree of protrusion of the elastic deformation portion toward the outside of the attachment body. It becomes possible to do. Further, since the engaging claws of the components protrude toward the inside of the attachment body, they do not protrude toward the outside of the attachment body.

  When the component is mounted, if the component is rotated while being inserted into the insertion hole of the mounting body, the first engaging portion of the mounting body contacts the elastic deformation portion of the component and elastically deforms the elastic deformation portion. Then, when the amount of rotation operation of the component reaches a predetermined amount, the first engagement portion engages with the elastic deformation portion from one side in the rotation direction. At this time, the second engaging portion of the attachment body engages with the engaging claw of the component from the other side in the rotational direction. Thereby, rotation of a component is blocked | prevented and components are attached to an attachment body.

  According to a second aspect of the present invention, in the first aspect of the invention, the component is a misassembly configured to protrude in the radial direction of the insertion hole and not to be elastically deformed when contacting the first engagement portion of the mounting body. An anti-attachment means is provided, and the erroneous assembly prevention means is disposed away from the elastic deformation portion in the rotational direction of the component.

  According to this configuration, when attaching the component to the mounting body, if the component is erroneously shifted from the normal position in the circumferential direction, the erroneous assembly preventing means is provided with the first engaging portion of the mounting body. At this time, since the erroneous assembly preventing means does not elastically deform, the part cannot be rotated to a predetermined position and cannot be attached to the attachment body.

  According to a third invention, in the first or second invention, the attachment body is formed with a claw insertion hole into which the engaging claw of the component is inserted, and the shape of the claw insertion hole is set to be long in the rotation direction of the component. And the 2nd engaging part of the said attachment body is comprised by the edge part of the said nail | claw insertion hole, It is characterized by the above-mentioned.

  According to this configuration, when the component is mounted, the component engaging claw is inserted into the nail insertion hole of the mounting body to rotate the component, and when the rotation operation amount reaches a predetermined amount, the engaging claw It will engage with the edge of the insertion hole.

  In a fourth aspect based on the third aspect, the engaging claw is formed in a hook shape that is hooked and engaged with the periphery of the claw insertion hole, and protrudes to the outside of the attachment body at the periphery of the claw insertion hole. The protrusion is formed.

  According to this configuration, when the component is engaged, the engaging claw of the component is not completely inserted into the claw insertion hole of the mounting body, and if it is rotated by mistake, the protrusion on the peripheral edge of the claw insertion hole The engaging claw rides up. As a result, the component is largely displaced from the normal attachment state, and thus cannot be attached to the attachment body.

  According to the first invention, since the elastic deformation portion of the component protrudes in the radial direction of the insertion hole, the length of the elastic deformation portion can be ensured without increasing the degree of protrusion to the outside of the attachment body. Further, since the engaging claws of the component are protruded toward the inside of the attachment body, it is not necessary to protrude toward the outside of the attachment body. When the rotation operation amount of the component reaches a predetermined amount, the first engagement portion of the attachment body is engaged with the elastic deformation portion from one side in the rotation direction, and the second engagement portion of the attachment body is engaged. Engage with the claws from the other side. Therefore, a part can be attached to an attachment body with a compact attachment structure.

  According to the second invention, since the erroneous assembly preventing means is provided on the component, it is possible to prevent the component from being attached to the attachment body in an incorrect state.

  According to the third invention, the claw insertion hole into which the engagement claw of the part is inserted is formed in the mounting body, and the second engagement portion is configured by the edge of the claw insertion hole, so the claw insertion hole is formed. Thus, the second engagement portion can be provided with a simple configuration.

  According to the fourth aspect of the present invention, the engaging claw is formed in a hook shape, and the protrusion that protrudes to the outside of the attachment body is formed at the periphery of the claw insertion hole. If it is accidentally turned without being completely inserted, the engaging claw rides on the protruding part at the periphery of the claw insertion hole and cannot be attached to the mounting body. Can be prevented.

It is a top view of the attachment structure of the components concerning Embodiment 1. It is a top view of a duct. It is the III-III sectional view taken on the line in FIG. It is a perspective view of an electrical component. It is a top view of electrical equipment parts. It is a side view of an electrical component. It is a bottom view of an electrical component. It is a front view of an electrical component. It is a back view of an electrical component. It is the XX sectional view taken on the line in FIG. It is the XI-XI sectional view taken on the line in FIG. FIG. 2 is a view corresponding to FIG. 1 in a state where an electrical component is inserted into an insertion hole of a duct. FIG. 2 is a view corresponding to FIG. 1 when the electrical component is being rotated. FIG. 2 is a view corresponding to FIG. 1 when an electrical component is to be mounted while being rotated 180 ° from a normal mounting position. FIG. 12 is a view corresponding to FIG. 11 when an electrical component is to be attached in a state where the engaging claws of the electrical component are not inserted into the claw insertion holes of the duct. It is a longitudinal cross-sectional view of the electrical component concerning a modification. FIG. 3 is a view corresponding to FIG. 1 according to the second embodiment. FIG. 5 is a diagram corresponding to FIG. 4 according to the second embodiment. FIG. 6 is a diagram corresponding to FIG. 5 according to the second embodiment. FIG. 7 is a view corresponding to FIG. 6 according to the second embodiment. FIG. 8 is a diagram corresponding to FIG. 7 according to the second embodiment. FIG. 9 is a diagram corresponding to FIG. 8 according to the second embodiment. FIG. 10 is a diagram corresponding to FIG. 9 according to the second embodiment. FIG. 15 is a diagram corresponding to FIG. 14 according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

(Embodiment 1)
FIG. 1 is a duct 10 of a vehicle air conditioner to which a component mounting structure 1 according to Embodiment 1 of the present invention is applied. As shown in FIG. 2, the duct 10 connects a blower unit U1 provided with a blower (not shown) and an air conditioning unit U2 provided with a heat exchanger for heating and cooling and the like from the blower unit U1. This is for guiding the blown air to the air conditioning unit U2.

  The duct 10 is formed by molding a resin material, and has connecting portions 10a and 10a at both ends. A part of the peripheral wall portion of the duct 10 is a flat wall portion 10b extending substantially flat. A blower speed control electrical component 20 (shown in FIG. 1) is detachably attached to the flat wall portion 10b. The component mounting structure 1 of the present invention is configured to rotate the electrical component 20 to be mounted on the duct 10.

  As shown in FIG. 2, an insertion hole 11 into which a part of the electrical component 20 is inserted is formed in the flat wall portion 10b of the duct 10 so as to penetrate the flat wall portion 10b. The center line of the insertion hole 11 extends in the plate thickness direction of the flat wall portion 10b. The peripheral edge of the insertion hole 11 is formed by a pair of arc portions 11a, 11a that are separated from each other in the circumferential direction, and bent portions 11b, 11b between the arc portions 11a, 11a. Each arc portion 11 a is configured by a part of a circle centered on the center of the insertion hole 11. Each of the bent portions 11b is bent so that the center portion thereof is positioned most inside the insertion hole 11a.

  Around the insertion hole 11 on the outer surface of the flat wall portion 10b, as shown in FIG. 3, there is formed an annular ridge portion 12 that protrudes to the outside of the duct 10 and extends annularly in the circumferential direction of the insertion hole 11a. Yes.

  Further, as shown in FIG. 2, first and second claw insertions in which first and second engagement claws 26 and 27 of an electrical component 20 described later are inserted around the insertion hole 11 of the flat wall portion 10b. Holes 13 and 14 are formed. The first claw insertion hole 13 is formed in a portion corresponding to the bent portion 11 b at the periphery of the insertion hole 11 inside the annular protrusion 12. The shape of the first claw insertion hole 13 is a substantially rectangular shape that is long in the circumferential direction of the insertion hole 11, and is gently curved so as to draw an arc centered on the center of the insertion hole 11. An edge portion (second engagement portion) 13 a on one side in the circumferential direction of the first claw insertion hole 13 extends linearly in the radial direction of the insertion hole 11. A first protrusion (protrusion) 15 is formed on the edge 13a of the first claw insertion hole 13 so as to protrude outward from the duct 10 and extend linearly along the edge 13a.

  The second claw insertion hole 14 has the same shape as the first claw insertion hole 13 and is separated from the first claw insertion hole 13 by 180 ° in the circumferential direction. A second protrusion 16 that protrudes to the outside of the duct 10 and extends linearly along the edge (second engaging portion) 14a is formed on the edge 14a on the circumferential side of the second claw insertion hole 14. Is formed.

  As shown in FIG. 3, an engagement protrusion (first engagement portion) 17 is provided on the outer surface of the flat wall portion 10 b of the duct 10 so as to protrude toward the outside of the duct 10. The protruding height of the engaging protrusion 17 from the outer surface of the flat wall portion 10 b is set higher than the protruding height of the annular ridge portion 12. The engagement protrusion 17 is separated from the annular protrusion 12 by a predetermined dimension in the radial direction outside the annular protrusion 12. Details of the position of the engagement protrusion 17 will be described later.

  As shown in FIG. 2, a step portion 17 a is formed on the side surface of the engagement protrusion 17 on the circumferential side of the insertion hole 11. An elastic piece 38 of the electrical component 20 described later is fitted into the stepped portion 17a.

  An inclined surface 17 b is formed on the side surface of the engagement protrusion 17 on the other side in the circumferential direction of the insertion hole 11. The inclined surface 17b is for contacting the elastic piece 38 of the electric component 20 and elastically deforming the elastic piece 38 when the electric component 20 is turned when the electric component 20 is attached. The inclined surface 17b is inclined so as to be positioned on one side in the circumferential direction as the insertion hole 11 is approached.

  As shown in FIGS. 4 to 9, the electrical component 20 includes a disk member 21 (see FIG. 7) that covers a lower surface of a substrate (not shown) on which a power MOS-FET (transistor) is mounted, and an upper surface of the substrate. Cover member 22 and heat radiating fins 23 are provided, and the heat radiating fins 23 are inserted into the duct 10 through the insertion holes 11.

  The disc member 21 is formed by molding a resin material. The outer diameter of the disc member 21 is set to be larger than the outer diameter of the annular protrusion 12 of the duct 10. As shown in FIG. 10 and FIG. 11, an annular recess 24 that fits the annular protrusion 12 of the duct 10 is formed on the lower surface of the disk member 21.

  As shown in FIGS. 6 and 7, first and second engaging claws 26 and 27 are formed on the lower surface of the disk member 21. The first and second engagement claws 26 and 27 are inserted into the first and second claw insertion holes 13 and 14 of the duct 10 in a state where the annular protrusion 12 of the duct 10 is fitted in the annular recess 24. It is positioned so that.

  The first engaging claw 26 protrudes downward from the lower surface of the disk member 21 and is formed in a hook shape that is open to one side in the circumferential direction. On the lower surface of the first engaging claw 26, a rib 26a is formed so as to protrude downward. The protruding direction of the first engaging claw 26 is a direction toward the inside of the duct 10 when attached to the duct 10.

  Similarly to the first engagement claw 26, the second engagement claw 27 protrudes downward from the lower surface of the disk member 21 and is formed in a hook shape opened to one side in the circumferential direction, and a rib 27a is formed on the lower surface. Has been.

  When the electrical component 20 is rotated to one side in the circumferential direction with the first and second engaging claws 26 and 27 inserted into the first and second claw insertion holes 13 and 14 of the duct 10, The edge 13a of the first claw insertion hole 13 enters the first engagement claw 26 from its opening side, and the edge 14a of the second claw insertion hole 14 enters the second engagement claw 27 from its opening side. Thereby, the first and second engagement claws 26 and 27 are engaged with the edge portions 13a and 14a of the first and second claw insertion holes 13 and 14, respectively.

  As shown in FIG. 4, the cover member 22 includes a disc portion 22 a having a shape corresponding to the disc member 21, and a peripheral wall portion 22 b extending from the peripheral portion of the disc portion 22 a so as to cover the periphery of the disc member 21. And. The cover member 22 is made of a resin material.

  A male connector portion 30 is integrally formed at the center of the disc portion 22a. The male connector part 30 protrudes in the shape of a rectangular tube. Inside the male connector portion 30, connector pins P (shown in FIG. 5) connected to the board are provided. A female connector (not shown) is inserted into and connected to the male connector portion 30.

  On both sides in the width direction of the male connector portion 30 of the disc portion 22a, bulging portions 31 and 31 that bulge outward from the male connector portion 30 are formed. As shown also in FIG. 10, the bulging parts 31 and 31 are the shapes extended in an up-down direction.

  As shown in FIG. 4, an elastic piece (elastic deformation portion) 38 protruding in the radial direction is provided on the outer surface of the peripheral wall portion 22 b of the cover member 22. As shown in FIG. 5, the elastic piece 38 extends toward the other side in the circumferential direction, and is inclined so as to be separated from the outer surface of the circumferential wall portion 22b in the radial direction as it goes to the distal end side. The elastic piece 38 is elastically deformed in the radial direction when a radial force is applied to the tip side thereof.

  Since the elastic piece 38 protrudes in the radial direction, the protruding direction is a direction along the outer surface of the duct 10. Therefore, even if the elastic piece 38 is lengthened, it only extends along the outer surface of the duct 10, and the degree of protrusion to the outside of the duct 10 is small.

  The engagement protrusion 17 of the duct 10 is arranged so that the inclined surface 17b contacts the elastic piece 38 when the electrical component 20 is inserted into the insertion hole 11 and rotated to one side in the circumferential direction. Further, the circumferential position of the engagement protrusion 17 is such that the edge 13a, 14a of the first and second claw insertion holes 13, 14 enters the first and second engagement claws 26, 27, and the elastic piece. 38 is arrange | positioned so that it may fit in the step part 17a.

  As shown in FIG. 4, a misassembly prevention protrusion (erroneous assembly prevention means) 39 is provided on the outer surface of the peripheral wall portion 22b of the cover member 22 so as to protrude in the radial direction. The amount of protrusion of the misassembly prevention protrusion 39 is longer than the distance between the outer surface of the peripheral wall portion 22b and the engagement protrusion 17, and is set so as to come into contact with the engagement protrusion 17 when the electrical component 20 is rotated. ing. The misassembly prevention protrusion 39 has a plate shape that does not easily elastically deform even when it contacts the engagement protrusion 17 during the turning operation of the electrical component 20. The misassembly prevention protrusion 39 is separated from the elastic piece 38 by 180 ° in the circumferential direction.

  The heat radiating fins 23 protrude downward from the lower surface of the disk member 21. The heat radiating fins 23 are arranged in the duct 10, and the air flowing in the duct 10 hits the heat radiating fins 23 so that a heat radiating effect is obtained.

  Next, the case where the electrical component 20 configured as described above is attached to the duct 10 will be described.

  First, the radiation fins 23 of the electrical component 20 are inserted into the insertion holes 11 of the duct 10. At this time, as shown in FIG. 12, the elastic piece 38 of the electrical component 20 is positioned on the other side in the circumferential direction with respect to the engaging protrusion 17 of the duct 10 and close to the engaging protrusion 17.

  Then, the first and second engaging claws 26 and 27 of the electrical component 20 are inserted into the first and second claw insertion holes 13 and 14 of the duct 10. Thereby, as shown in FIG. 10, the annular protrusion 12 of the duct 10 is inserted into the annular recess 24 of the electrical component 20.

  Thereafter, the electrical component 20 is rotated to one side in the circumferential direction. At the time of the rotation operation, the bulging portions 31 and 31 of the cover member 22 of the electrical component 20 are located at a portion close to the outer peripheral side of the electrical component 20. It is easy to apply torque to the. That is, the bulging parts 31 and 31 are parts to which a force is applied during the turning operation.

  When the electrical component 20 is rotated to one side in the circumferential direction, the first and second engaging claws 26 and 27 of the electrical component 20 are moved in the first and second claw insertion holes 13 and 14 of the duct 10. The insertion holes 13 and 14 move in the longitudinal direction. And the edge parts 13a and 14a of the 1st and 2nd nail insertion holes 13 and 14 of the duct 10 enter into the open side of the first and second engaging claws 26 and 27 of the electrical component 20, and the edge parts 13a and 14a It contacts the inner surfaces of the first and second engaging claws 26 and 27 (see FIG. 11). As a result, the electrical component 20 is prevented from rotating to one side in the circumferential direction, the first and second engaging claws 26 and 27 engage with the edges 13a and 14a, and the electrical component 20 is connected to the duct 10. It will not move in or out.

  Further, when the electrical component 20 is rotated to one side in the circumferential direction, the elastic piece 38 of the electrical component 20 approaches the engagement projection 17 of the duct 10 and contacts the inclined surface 17b of the engagement projection 17. . As shown in FIG. 13, when the electrical component 20 is further rotated, the elastic piece 38 is pushed inward in the radial direction by the inclined surface 17b and elastically deformed. When the electrical component 20 is rotated until the tip of the elastic piece 38 extends beyond the inclined surface 17b and corresponds to the stepped portion 17a, as shown in FIG. 1, the shape of the elastic piece 38 returns to the original shape and the stepped portion 17a. Fits into. Thereby, even if it is going to rotate the electrical component 20 to the other side of the circumferential direction, since the elastic piece 38 will be stretched in the state fitted to the step part 17a, the rotation to the other side is prevented. The timing at which the elastic piece 38 fits into the stepped portion 17a is substantially the same as the timing at which the edge portions 13a, 14a abut on the back side in the fitting direction of the first and second engaging claws 26, 27. Accordingly, the electrical component 20 is prevented from rotating to both sides in the circumferential direction, and the electrical component 20 is attached to the duct 10.

  Next, a case where the operator attaches the electrical component 20 to the duct 10 in a state where the electrical component 20 is turned 180 ° with respect to the regular position will be described.

  In this case, as shown in FIG. 14, the misassembly prevention protrusion 39 of the electrical component 20 is located on the other side in the circumferential direction in the vicinity of the engagement protrusion 17 of the duct 10. In this state, when the electrical component 20 is rotated to one side in the circumferential direction, the misassembly prevention protrusion 39 comes into contact with the inclined surface 17 b of the engagement protrusion 17. Since the misassembly prevention protrusion 39 does not elastically deform with such a force, it does not get over the inclined surface 17b of the engagement protrusion 17, and the electrical component 20 does not rotate any more. Therefore, the edges 13a and 14a of the first and second claw insertion holes 13 and 14 of the duct 10 do not enter the open side of the first and second engaging claws 26 and 27 of the electrical component 20, and the electrical component 20 is ducted. 10 can not be attached. That is, it is possible to prevent the electrical component 20 from being attached in an incorrect state.

  Further, as shown in FIG. 15, when the electrical component 20 is attached, the first engagement claw 26 of the electrical component 20 is erroneously rotated without being completely inserted into the first claw insertion hole 13 of the duct 10. In this case, the first engagement claw 26 rides on the first protrusion 15 of the first claw insertion hole 13. As a result, the electrical component 20 is greatly displaced from the normal attachment state, and cannot be attached to the duct 10. Therefore, it is possible to prevent the electrical component 20 from being attached in a wrong state.

  Similarly, when the second engaging claw 27 of the electrical component 20 is accidentally rotated without being completely inserted into the second claw insertion hole 14 of the duct 10, the electrical component 20 cannot be attached in the same manner. .

  As described above, according to the first embodiment, the elastic piece 38 of the electrical component 20 protrudes in the radial direction of the insertion hole 11 of the duct 10, so that the degree of protrusion to the outside of the duct 10 is not increased. The length of the elastic piece 38 can be ensured. Further, since the engaging claws 26 and 27 of the electrical component 20 are protruded toward the inside of the duct 10, it is not necessary to protrude toward the outside of the duct 10. When the amount of rotation of the electrical component 20 reaches a predetermined amount, the engagement protrusion 17 of the duct 10 is engaged with the elastic piece 38, and the first and second claw insertion holes 13 and 14 of the duct 10 are engaged. The edges 13a, 14a engage with the first and second engaging claws 26, 27. Therefore, the electrical component 20 can be attached to the duct 10 with a compact attachment structure.

  Further, since the electrical component 20 is provided with the misassembly prevention protrusion 39 away from the elastic piece 38 in the rotational direction, it is possible to prevent the electrical component 20 from being attached to the duct 10 in an erroneous state.

  In addition, the first engaging claw 26 is formed in a hook shape, and the first protrusion 15 protruding to the outside of the duct 10 is formed at the edge of the first claw insertion holes 13, 14. When the first engagement claw 26 is accidentally rotated without being completely inserted into the first claw insertion hole 13 of the duct 10, the first engagement claw 26 rides on the first protrusion 15, The component 20 cannot be attached to the duct 10. Thereby, it is possible to prevent the electrical component 20 from being attached in an incorrect state.

  Note that, as in the modification shown in FIG. 16, the heat dissipating fins 23 of the electrical member 20 may be protruded greatly into the duct 10. In this modified example, the fixing portion 21c of the radiating fin 23 in the circular plate portion 21 may be formed so as to protrude downward. Thereby, the air quantity which hits the radiation fin 23 increases, and cooling performance improves.

(Embodiment 2)
FIG. 17 shows a member mounting structure 1 according to Embodiment 2 of the present invention. The second embodiment is different from the first embodiment only in the structure of the electrical component 20 and the structure of the duct 10 is the same. Therefore, the parts different from the first embodiment will be described in detail below.

  In the second embodiment, as illustrated in FIGS. 18 to 23, the electrical component 20 includes a substrate 41 on which a resistance circuit is mounted instead of a power MOS-FET (transistor). A part of the substrate 41 protrudes downward instead of the radiation fins 23 of the first embodiment. Further, the male connector portion 30 of the cover member 22 has an elongated shape.

  Even in the second embodiment, the electrical component 20 can be attached to the duct 10 as in the first embodiment.

  In addition, as shown in FIG. 24, when the operator attaches the electrical component 20 to the duct 10 in a state where the electrical component 20 is rotated 180 ° with respect to the normal attachment state, the electrical component 20 cannot be attached to the duct 10. Therefore, it is possible to prevent the electrical component 20 from being attached in a wrong state.

  According to the member attachment structure 1 according to the second embodiment, the electrical component 20 can be attached to the duct 10 with a compact attachment structure as in the first embodiment.

  The electrical component 20 may be attached to the casing (attachment body) of the air conditioner other than the duct 10.

  In the first and second embodiments, only one elastic piece 38 is provided on the electrical component 20. However, the present invention is not limited to this, and a plurality of elastic pieces 38 may be provided. In the case of providing a plurality, the duct 10 is provided with a plurality of engaging projections 17 corresponding to the elastic pieces 38.

  In the first and second embodiments, the electrical component 20 is provided with two engaging claws. However, the present invention is not limited to this, and the number of engaging claws may be three or more. When three or more are provided, a claw insertion hole is formed in the duct 10 so as to correspond to the engaging claw.

  Moreover, although the said Embodiment 1, 2 demonstrated the case where it was the electrical component 20 for fan speed adjustment as components attached to an attachment body, it is not restricted to this, For example, the motor of a fan etc. may be sufficient. In this case, the attachment body is a casing.

  Moreover, this invention can be widely applied not only when attaching the electrical component 20 of an air conditioner but when attaching to an attachment body by rotating various components.

  As described above, the component mounting structure according to the present invention can be applied when, for example, an electrical component of an air conditioner is mounted on a duct or casing.

1 Parts mounting structure 10 Duct (mounting body)
11 Insertion hole 13 1st nail insertion hole 13a Edge (2nd engaging part)
14 2nd nail | claw insertion hole 14a Edge (2nd engaging part)
15 First protrusion (protrusion)
16 Second protrusion (protrusion)
17 engaging protrusion (first engaging portion)
20 electrical component 26 first engagement claw 27 second engagement claw 38 elastic piece (elastic deformation part)
39 Misassembly prevention protrusion (Incorrect assembly prevention means)

Claims (4)

In the mounting structure of the component configured to rotate around the center line of the insertion hole in a state where the component is inserted into the insertion hole of the mounting body,
The component is provided with an elastic deformation portion that protrudes in the radial direction of the insertion hole and elastically deforms in the radial direction, and an engaging claw that protrudes inward of the attachment body,
Around the insertion hole in the mounting body, there is a first engagement portion that engages with the elastic deformation portion from one side in the rotation direction during a rotation operation, and the engagement claw from the other side in the rotation direction. A second engaging portion to be joined,
The first engaging portion contacts the elastic deformation portion by rotating the component and elastically deforms the elastic deformation portion in the radial direction of the insertion hole. When the amount is fixed, the elastic deformation part is displaced in the restoring direction and is arranged to engage the elastic deformation part from one side in the rotation direction,
The second engaging portion is disposed so as to be engaged with the engaging claw from the other side in the rotation direction when a rotation operation amount of the component reaches a predetermined amount. Mounting structure. In the component mounting structure according to claim 1,
The component is provided with erroneous assembly preventing means configured to protrude in the radial direction of the insertion hole and not to be elastically deformed when contacting the first engaging portion of the mounting body,
The component mounting structure according to claim 1, wherein the erroneous assembly preventing means is disposed away from the elastically deforming portion in the rotational direction of the component. In the component mounting structure according to claim 1 or 2,
The attachment body is formed with a claw insertion hole into which the engaging claw of the component is inserted, and the shape of the claw insertion hole is set to be long in the rotation direction of the component,
A mounting structure for a component, wherein the second engaging portion of the mounting body is configured by an edge portion of the claw insertion hole. In the component mounting structure according to claim 3,
The engaging claw is formed in a hook shape that is hooked and engaged with the periphery of the claw insertion hole,
A mounting structure for a component, characterized in that a projecting portion that protrudes to the outside of the mounting body is formed at the periphery of the claw insertion hole.

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