JP2010223373A - Channel switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a channel switching device in a simple construction for switching selective communication of a fluid flow-in part with a plurality of fluid flow-out parts so that fluid flowing into the fluid flow-in part can flow out of the plurality of fluid flow-out parts in many patterns. <P>SOLUTION: In one state that a plurality of second through-holes 32a-32c are selectively communicated with a plurality of jet ports 5-7, a first disc 21 is turned relative to a second disc 22 to selectively communicate an air flow-in port 16d with the plurality of jet ports 5-7 via first through-holes 31a-31c and the second through-holes 32a-32c in one pattern. In the other state that first and second discs 21, 22 are integrally turned to switch selective communication of the plurality of second through-holes 32a-32c with the plurality of jet ports 5-7, the first disc 21 is turned relative to the second disc 22 to selectively communicate the air flow-in port 16d with the plurality of jet ports 57 via the first through-holes 31a-31c and the second through-holes 32a-32c in the other pattern. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a flow path switching device.

  Conventionally, what was described, for example in patent document 1 as a flow-path switching apparatus is known. The flow path switching device includes a housing (72) having an air inlet (H0) in the rotation axis direction and a plurality of air outlets (H1 to H6) in the circumferential direction, and is rotatably accommodated in the housing. A rotor (71) having an air inlet (R0) in the rotation axis direction and an air outlet (R1) communicating with the air inlet in the circumferential direction is configured. The rotor is rotationally driven by the motor (73) so that the air outlet is in communication with any one of the plurality of air outlets of the housing. That is, this flow path switching device includes a housing having a plurality of air outlets with respect to one air inlet, and switches the flow path by rotating a rotor housed in the housing. Thereby, air can be blown and sent to a plurality of locations with a single blower.

JP 2003-240136 A

  By the way, in the flow path switching device of Patent Document 1, the rotation of the rotor causes the air outlet to communicate with any one of the plurality of air outlets of the housing, so that air is blown by a single blower. Since this is done, only one of the selected locations is limited.

  An object of the present invention is to switch the selective communication between a fluid inflow portion and a plurality of fluid outflow portions with a simple configuration, and cause the fluid that has flowed into the fluid inflow portion to flow out from the plurality of fluid outflow portions in more patterns. An object of the present invention is to provide a flow path switching device that can perform this.

  In order to solve the above problems, the invention according to claim 1 is characterized in that a cylindrical fluid inflow portion into which a fluid flows and a plurality of fluid outflow portions from which the fluid that has flowed into the fluid inflow portion can flow out are provided in a circumferential direction. And a plurality of first members that are rotatably stacked on the lid body and selectively communicated with the plurality of fluid outflow portions. One of the first disk and the second disk in which the through hole and the second through hole are arranged in the circumferential direction, a drive source for rotationally driving the first disk, and one of the first and second disks The engagement protrusion provided on the other of the first and second disks, and the engagement protrusion is loosely inserted so that the first disk relative to the second disk in a predetermined angle range. The first and the first are allowed at the end of the predetermined angle range while allowing the rotation. An engagement recess that is engaged with the engagement protrusion so that the disk rotates integrally, and the plurality of second through holes and the plurality of fluid outflow portions are in selective communication with each other, By rotating the first disk relative to the second disk, the fluid inflow portion and the plurality of fluid outflow portions are selectively communicated in a pattern through the first and second through holes. The first disk and the second disk are integrally rotated to switch the selective communication between the plurality of second through holes and the plurality of fluid outflow portions in the other state. The gist of the invention is to rotate the one disk relatively to selectively communicate the fluid inflow portion and the plurality of fluid outflow portions in another pattern through the first and second through holes.

  According to the same configuration, in the state in which the plurality of second through holes and the plurality of fluid outflow portions are selectively in communication, the first disk is rotated relative to the second disk to thereby rotate the fluid. The inflow portion and the plurality of fluid outflow portions are selectively communicated with each other in a pattern through the first and second through holes, or the first and second discs are rotated together to form the plurality of first portions. 2 In another state in which the selective communication between the through hole and the plurality of fluid outflow portions is switched, the first disc is rotated relative to the second disc, and the fluid inflow portion and the plurality of fluids are rotated. The outflow part can be selectively communicated in another pattern through the first and second through holes. In this way, by using two disks (first and second disks) and changing the combination of the respective rotational positions, the first and second fluid inflow portions and the plurality of fluid outflow portions are changed. The selective communication through the two through holes is switched, and the fluid that has flowed into the fluid inflow portion can be allowed to flow out from the plurality of fluid outflow portions in more patterns. Further, by adopting an extremely simple configuration using two disks stacked on the lid, the entire apparatus can be further downsized.

  According to a second aspect of the present invention, in the flow path switching device according to the first aspect, the fluid outflow portion, the first through hole, and the second through hole are arranged at the same predetermined angular interval. The gist of the present invention is that the predetermined angle range in which relative rotation of the first disk with respect to the second disk is allowed is set to twice the predetermined angle.

  According to the configuration, by combining the relative rotation of the first disk with respect to the second disk and the integral rotation of the first and second disks, any one of the fluids by the first and second disks. The communication of the outflow part can be blocked. Accordingly, the communication between the fluid inflow portion and the plurality (three) of the fluid outflow portions via the first and second through holes are all different patterns in which at least one fluid outflow portion communicates ( It can be realized by the number of patterns: 7 = 2 ^ 3-1). As a result, with a small number of fluid outflow portions, etc., it is possible to efficiently obtain more patterns of communication between the fluid inflow portions and the plurality (three) of fluid outflow portions, thereby further downsizing the entire apparatus. can do.

A third aspect of the present invention is summarized in that, in the flow path switching device according to the second aspect, the predetermined angle is 90 °.
According to this configuration, the fluid outflow portion, the first through hole, and the second through hole are 270 ° (= 90 ° × 3) angles of the lid, the first disc, and the second disc, respectively. It is arranged in a range. Therefore, the communication of any one of the fluid outflow portions can be blocked in the remaining 90 ° angle range of the first and second disks. As described above, the fluid outflow portion, the first through hole, and the second through hole are disposed by effectively using the space of the lid, the first disk, and the second disk, so that the fluid outflow The opening areas of the part, the first through hole, and the second through hole can be made larger.

  Invention of Claim 4 is the flow-path switching apparatus as described in any one of Claims 1-3. WHEREIN: The said 2nd disk is pinched | interposed between the said 1st disk and the said cover body, A gist is provided between the second disk and the lid, and holding means for preventing the second disk from rotating in a state where the plurality of second through holes and the plurality of fluid outflow portions are selectively communicated with each other. And

  According to this configuration, the second disk is prevented from rotating by the holding means, thereby suppressing a positional deviation (accompanying rotation) that occurs in the second disk when the first disk rotates relative to the second disk. It is possible to improve the reliability of channel switching.

  In the present invention, the selective communication between the fluid inflow portion and the plurality of fluid outflow portions can be switched with a simple configuration, and the fluid that has flowed into the fluid inflow portion can be caused to flow out from the plurality of fluid outflow portions in more patterns. A flow path switching device that can be provided can be provided.

The disassembled perspective view which shows one Embodiment of this invention. (A) is a top view which shows the same embodiment, (b) is sectional drawing which followed the AA line of (a). (A) and (b) are the top view and back view which show a 1st disc. (A) and (b) are the top view and back view which show a 2nd disc. (A) and (b) are the top view and back view which show a cover body. (A)-(e) is sectional drawing which shows typically operation | movement of the embodiment. The list figure which shows the relationship with the connection and non-communication of the 1st-3rd jet nozzle corresponding to each pattern. (A)-(d) is explanatory drawing which shows the rotation angle of the 1st and 2nd disc in each pattern. (A)-(c) is explanatory drawing which shows the rotation angle of the 1st and 2nd disc in each pattern. Schematic which shows the bed with a ventilation function.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 10 is a schematic diagram showing the bed 1 with a ventilation function to which the flow path switching device according to the present embodiment is applied. As shown in the figure, the bed 1 with a ventilation function includes a substantially rectangular parallelepiped mattress 2 and a box-shaped air blower 3 built in the leg under the mattress 2. The air blower 3 communicates with an air inlet 4 that extends in the width direction in the mattress 2 and can suck external air.

  The blower 3 includes a nozzle-shaped first jet port 5, a second jet port 6, and a third jet port 7 as a plurality (three) of fluid outflow portions that can eject the sucked external air. . The first jet outlet 5 communicates with an air passage 8 capable of ejecting the sucked-out external air from a tip portion that extends in the length direction in the mattress 2 and bends in the width direction. Further, the second jet outlet 6 communicates with an air passage 9 capable of ejecting the sucked-out external air from a tip portion extending in the length direction in the mattress 2 and bent in the width direction. Further, the third jetting port 7 extends in the width direction in the mattress 2 and continuously extends in the length direction, and is externally sucked from the tip portion bent in a manner of being folded back in the width direction. An air passage 10 through which air can be ejected communicates.

  The blower 3 is electrically connected to the remote controller 11 for operation. The blower 3 generates a wind of external air by a driving operation of the remote controller 11 and selectively blows out the sucked external air from at least one of the three outlets 5 to 7 by a selection operation of the remote controller 11. . Thereby, external air is ejected from at least one place of the front-end | tip part of the air paths 8-10. In addition, each front-end | tip part which ejects the external air of the air paths 8-10 is opening to the quilt layer 2a of the ventilation structure which makes the surface layer part of the mattress 2. As shown in FIG. Therefore, the external air inhaled by the blower 3 is sent to the surface of the mattress 2 through the quilt layer 2a, so that sleep in a comfortable environment with excellent breathability is realized.

  Next, the blower 3 will be further described. FIG. 1 is an exploded perspective view showing the blower 3. Moreover, Fig.2 (a) is a top view which shows the air blower 3, FIG.2 (b) is sectional drawing along the AA line of Fig.2 (a). As shown in the figure, the housing 16 forming the outer shape of the air blower 3 is closed at the intermediate part of the square cylindrical side wall part 16a and the opening direction of the side wall part 16a (vertical direction in FIG. 2B). The bottom wall portion 16b is integrally formed. And the accommodation part 16c which makes a substantially square cylinder shape with the said side wall part 16a is standingly arranged in the one side (left upper side of Fig.2 (a)) of the bottom wall part 16b, and the other side of the bottom wall part 16b An air inflow port 16d as a fluid inflow portion having a substantially cylindrical shape is provided upright (on the right side of FIG. 2A). The accommodating portion 16c and the air inflow port 16d are connected to each other by a connecting wall 16e extending in the left-right direction, with each facing portion in the left-right direction shown in the figure cut out. The bottom wall portion 16b is provided with a bearing portion 16f (see FIG. 2B) that protrudes in a stepped cylindrical shape at the center of the air inlet 16d.

  As shown in FIG. 2A, for example, an impeller type blower 18 is accommodated in the accommodating portion 16c. A square plate-like cover 19 is attached and fixed to the opening of the side wall portion 16a so as to be in close contact with the tips of the accommodating portion 16c, the air inlet 16d, and the connecting wall 16e. The cover 19 is formed with a circular hole 19a concentric with the air inlet 16d and having an inner diameter equivalent to the inner diameter thereof. Accordingly, the accommodating portion 16c and the connecting wall 16e form an air passage 20 that communicates with the air inlet 16d together with the side wall portion 16a, the bottom wall portion 16b, and the cover 19, and serves as a fluid sent by driving the blower 18. Air (wind) flows into the air inlet 16d through the air passage 20. The air flowing into the air inlet 16d is external air sucked from the intake port 4.

  As shown in FIG. 2B, a stepping motor 17 as a drive source is installed on the lower surface of the bottom wall portion 16b, and the rotating shaft 17a passes through the bottom wall portion 16b and the bearing portion 16f. Appears inside. On the other hand, a disk-shaped first disk 21 having an outer diameter equivalent to the inner diameter is accommodated in the open end of the air inlet 16d, and the outer diameter and inner diameter of the bearing portion 16f are stored in the center. A stepped columnar shaft portion 21a having an outer diameter equivalent to each of the protrusions is projected. The shaft portion 21a is restricted from moving in the axial direction by a stepped portion that abuts on the bearing portion 16f, and is pivotally supported by a tip portion inserted into the bearing portion 16f. Further, the shaft portion 21a is connected so that a tip portion inserted into the bearing portion 16f rotates integrally with the rotary shaft 17a. Accordingly, the first disk 21 is rotatably accommodated in the air inlet 16d around the shaft portion 21a and is driven to rotate by the stepping motor 17.

  As shown in FIGS. 3 (a) and 3 (b), a plurality (three) of circular first through holes 31a, 31b, 31c are arranged on the first disk 21 at a predetermined angle (90 °) interval in the circumferential direction. It is installed. The first through holes 31a to 31c have the same opening area. That is, the first through holes 31a to 31c are arranged in an angle range of 270 ° (= 90 ° × 3) of the first disk 21, and the remaining 90 ° angle range of the first disk 21 is blocked. A portion 31d is formed. Accordingly, the first disk 21 closes the air inlet 16d in such a manner that the first disk 21 is pivotally supported by the air inlet 16d at an outer peripheral portion that is close to or slidably contacted with the inner peripheral surface of the air inlet 16d and the first through hole The air inlet 16d is opened at 31a to 31c.

  A bearing recess 21b is formed in the center of the first disk 21. The bearing recess 21b is circularly recessed from the upper surface to the lower side. Further, the first disk 21 is formed with an engaging protrusion 21c that protrudes upward from the upper surface on the outer peripheral side of the bearing recess 21b that is at an intermediate angular position between the first through holes 31b and 31c. . The engagement protrusion 21 c has a sharp fan shape centered on the bearing recess 21 b, and the protrusion length is set to be equal to the plate thickness of the first disk 21.

  As shown in FIG. 2 (b), a disc-shaped second disk 22 having an outer diameter equivalent to the inner diameter of the air inlet 16d is overlapped on the upper surface of the first disk 21 at the opening end of the air inlet 16d. A cylindrical shaft portion 22a, 22b having an outer diameter equivalent to the inner diameter of the bearing concave portion 21b is projected from the lower portion and the upper portion, respectively, in the center portion. The protruding lengths of the shaft portions 22a and 22b are set to be equal to the plate thickness of the second disk 22. One shaft portion 22a is inserted into and supported by the bearing recess 21b. Accordingly, the second disk 22 is also housed in the air inlet 16d so as to be rotatable about the shaft portion 22a.

  As shown in FIGS. 4A and 4B, the second disk 22 is formed with an engagement hole 22c as an engagement recess penetrating in the vertical direction on the outer peripheral side of the shaft portion 22a. The engagement hole 22c extends in a fan shape within an angle range of about 180 ° of the second disk 22, and the engagement protrusion 21c is loosely inserted (see FIG. 2B). The engagement hole 22c allows the first disk 21 to rotate relative to the second disk 22 in a predetermined angle range (180 °) in a manner that the engagement protrusion 21c runs idle. At the end, the first and second disks 21 and 22 are engaged with the engaging protrusion 21c so as to rotate integrally. That is, when the engagement protrusion 21c reaches any one end in the circumferential direction of the engagement hole 22c with the rotation of the first disk 21, the engagement protrusion 21c with the further rotation of the first disk 21. Presses the end of the engagement hole 22c, whereby the second disk 22 rotates integrally.

  Further, a plurality of (three) circular second through holes 32a, 32b, 32c are arranged in parallel on the second disk 22 at a predetermined angle (90 °) interval in the circumferential direction. The opening areas of the second through holes 32a to 32c are set to be equal to the opening areas of the first through holes 31a to 31c. That is, the second through holes 32a to 32c are arranged in an angle range of 270 ° (= 90 ° × 3) of the second disk 22, and the remaining 90 ° angle range of the second disk 22 is blocked. A portion 32d is formed. The separation distance from the shaft portion 22a (bearing recess 21b) of the second through holes 32a to 32c is set to be equal to the separation distance from the bearing recess 21b of the first through holes 31a to 31c. Therefore, the second disk 22 closes the air inlet 16d in a manner that is pivotally supported by the air inlet 16d at an outer peripheral portion that is close to or slidably contacted with the inner peripheral surface of the air inlet 16d, and the second through hole. The air inlet 16d is opened via the first disk 21 in 32a to 32c.

  The second disk 22 is provided with a plurality of (four) protrusions 22d that protrude from the upper surface on the outer peripheral side of the shaft 22b in parallel at a predetermined angle (90 °) interval in the circumferential direction. ing. Each protrusion 22 d has a hook shape extending in the radial direction, and the protrusion length is set to be smaller than the plate thickness of the second disk 22.

  As shown in FIG. 2B, a disc-shaped lid 23 having an outer diameter equivalent to the inner diameter of the circular hole 19a is provided at the opening end (downstream opening end) of the air inlet 16d. It is fixed in such a manner that it is further superimposed on the upper surface of the disk 22. The lid 23 closes the circular hole 19 a so as to be flush with the cover 19. In addition, a circular bearing hole 23a having an inner diameter equivalent to the outer diameter of the shaft portion 22b is formed at the center of the lid body 23, and the shaft portion 22b inserted into the bearing hole 23a is pivotally supported. . Therefore, the first and second disks 21 and 22 are rotatably stacked on the lid body 23 in such a manner that movement in the axial direction is restricted by the bearing portion 16f and the lid body 23. The plate thicknesses of the first and second disks 21 and 22 and the lid 23 are set to be equal to each other.

  And as shown to Fig.5 (a) (b), the said 1st-3rd jet nozzles 5-7 are arrange | positioned at the cover body 23. As shown in FIG. These 1st-3rd jet nozzles 5-7 are arranged in parallel by the predetermined angle (90 degree) space | interval in the circumferential direction. The separation distance from the bearing hole 23a (shaft portion 22b) of the first to third jet outlets 5 to 7 is set to be equal to the separation distance from the shaft portion 22b of the second through holes 32a to 32c. That is, the 1st-3rd jet nozzles 5-7, the 1st through-holes 31a-31c, and the 2nd through-holes 32a-32c are arrange | positioned on the same circle centering on the bearing hole 23a. Moreover, the opening area of the 1st-3rd jet nozzles 5-7 is set equivalent to the opening area of the 2nd through-holes 32a-32c. That is, the 1st-3rd jet nozzles 5-7 are arrange | positioned in the angle range of 270 degrees (= 90 degrees x3) of the cover body 23, The angle range of the remaining 90 degrees of this cover body 23 is The blocking part 23b is formed. The selective communication between the air inlet 16d and the first to third jet outlets 5 to 7 through the first through holes 31a to 31c and the second through holes 32a to 32c is performed by the first and second disks 21. , 22 can be switched by changing the combination of the rotational positions.

  In the lid body 23, a plurality (four) of groove portions 23c recessed from the lower surface to the upper side on the outer peripheral side of the bearing hole 23a are juxtaposed in the circumferential direction at a predetermined angle (90 °). . Each groove 23c has a semicircular groove shape extending in the radial direction, and the protrusion 22d can be fitted therein (see FIG. 2B). The protrusions 22 d and the grooves 23 c constitute holding means for preventing the second disk 22 from rotating with respect to the lid body 23.

  Next, the positioning mode of the first and second disks 21 and 22 will be described with reference to the schematic cross-sectional view shown in FIG. In the figure, for the sake of convenience, the engagement hole 22c in which the engagement protrusion 21c moves as the first disk 21 rotates is drawn as a continuous groove-like space, and the rotation of the second disk 22 is prevented. The holding means (projecting part 22d and groove part 23c) according to is drawn together.

  As shown in FIG. 6A, the second disk 22 is prevented from rotating at one rotational position by the protrusion 22d and the groove 23c, and the engagement protrusion 21c of the first disk 21 is rotated around the engagement hole 22c. It is assumed that it is arranged at the center between both ends in the direction. In this state, when the first disk 21 is rotationally driven in one side direction (the direction in which the engaging protrusion 21c moves to the right side in the drawing), as shown in FIG. The engagement protrusion 21c reaches the end in the circumferential direction of the engagement hole 22c while leaving 22 left.

  In this state, when the first disk 21 is further driven to rotate in one direction, as shown in FIG. 6C, the engagement protrusion 21c presses the end in the circumferential direction of the engagement hole 22c. Thus, the second disk 22 starts to rotate integrally with the first disk 21. At this time, the protrusion 22d slips out of the groove 23c and slides on the facing surface of the lid 23.

  Then, as the second disk 22 rotates integrally, as shown in FIG. 6D, when the protrusion 22d reaches the adjacent groove 23c and fits into the groove 23c, the second disk 22 is moved to the next rotational position. It is stopped at.

  In this state, when the first disk 21 is rotationally driven in the other direction (the direction in which the engaging protrusion 21c moves to the left side in the drawing), as shown in FIG. The engagement protrusion 21c moves through the engagement hole 22c with the two disks 22 left.

  In this way, by combining the relative rotation of the first disk 21 with respect to the second disk 22 and the integral rotation of the first and second disks 21 and 22, the combination of the rotational positions of the first and second disks 21 and 22 is combined. Is changed.

  Here, in the state where the rotation of the second disk 22 is prevented by the protrusion 22d and the groove 23c, the angular positions where the second through holes 32a to 32c are arranged and the first to third jet outlets 5 to 7 are arranged. The angular position is set so as to coincide with at least two places. In addition, when the second disk 22 is prevented from rotating, in the state where the engagement protrusion 21c is disposed at one end or the center between both ends in the circumferential direction of the engagement hole 22c, The angular positions at which the through holes 31a to 31c are arranged and the angular positions at which the first to third jet outlets 5 to 7 are arranged are set to coincide with each other at least at two places. In other words, each of the first and second disks 21 and 22 can block any one of the first to third jet outlets 5 to 7 at the corresponding blocking portions 31d and 32d. Thereby, the first through holes 31a to 31c and the first through holes 31a to 31c of the air inlet 16d and the first to third jets 5 to 7 and the first are changed by changing the combination of the rotational positions of the first and second disks 21 and 22. The communication through the two through holes 32a to 32c can be realized with all different patterns (number of patterns: 7 = 2 ^ 3-1) in which at least one or more of the jet outlets 5 to 7 communicate.

  Hereinafter, all (seven) different patterns A to G in which the air inlet 16d and at least one or more jet outlets 5 to 7 communicate with each other will be described with reference to FIGS. FIG. 7 is a list showing the relationship between the patterns A to G and the communication / non-communication of the corresponding first to third ejection ports 5 to 7, and the first to third in the communication state. The jet nozzles 5 to 7 are indicated by ◯ marks. 8 (a) to 8 (d) and FIGS. 9 (a) to 9 (c) show the first and second positions based on the rotation position (hereinafter also referred to as the rotation angle) of the lid 23 in each of the patterns A to G. It is explanatory drawing which shows the rotation angle of the 2nd discs 21 and 22. FIG.

  First, the pattern A in which the air inlet 16d communicates with all of the first to third jet outlets 5 to 7 will be described. As shown in FIG. 8A, when the rotation angles of the first and second disks 21 and 22 at this time are expressed by “0 °”, the first through hole 31a of the first disk 21 at the rotation angle. To 31c and the second through holes 32a to 32c of the second disk 22 are all in communication with the corresponding first to third outlets 5 to 7.

  In the pattern B in which the air inlet 16d communicates with the second and third jet outlets 6 and 7, the first disk 21 is rotated clockwise from the rotation angle in the pattern A as shown in FIG. It is at a rotation angle of “270 (= 360−90) °” rotated by “90 °” in the direction, and the first ejection port 5 is blocked by the blocking portion 31d.

  Further, in the pattern C in which the air inlet 16d and the first and third jet outlets 5 and 7 communicate with each other, the first disk 21 rotates clockwise from the rotation angle in the pattern A as shown in FIG. The rotation angle is “180 (= 360−180) °” rotated by “180 °” in the direction, and the second jet nozzle 6 is blocked by the blocking portion 31d.

  Further, in the pattern D in which the air inlet 16d and the first and second jet outlets 5 and 6 communicate with each other, the first and second disks 21 and 22 are both in the pattern A as shown in FIG. The rotation angle is “90 °” rotated “90 °” in the counterclockwise direction in the figure, and the third jetting port 7 is blocked by the blocking portions 31d and 32d.

  Furthermore, in the pattern E in which the air inlet 16d and the first jet outlet 5 communicate with each other, as shown in FIG. The rotation angle is “90 °” rotated by “90 °”, and the third ejection port 7 is blocked by the blocking portion 31d. On the other hand, the second disk 22 is at a rotation angle of “180 °” rotated “180 °” in the clockwise direction in the figure from the rotation angle in the pattern A, and the second ejection port 6 is blocked by the blocking portion 32d. .

  Further, in the pattern F in which the air inlet 16d and the second jet outlet 6 communicate with each other, as shown in FIG. 9B, the first disk 21 is “90” in the counterclockwise rotation direction from the rotation angle in the pattern A. The rotation angle is “90 °” rotated, and the third jetting port 7 is blocked by the blocking portion 31d. On the other hand, the second disk 22 is at a rotation angle of “270 °” rotated by “90 °” in the clockwise direction in the figure from the rotation angle in the pattern A, and the first ejection port 5 is blocked by the blocking portion 32d. .

  Further, in the pattern G in which the air inlet 16d and the third jet outlet 7 communicate with each other, as shown in FIG. The rotation angle is “180 °” rotated, and the second ejection port 6 is blocked by the blocking portion 31d. On the other hand, the second disk 22 is at a rotation angle of “270 °” rotated by “90 °” in the clockwise direction in the figure from the rotation angle in the pattern A, and the first ejection port 5 is blocked by the blocking portion 32d. .

As described above, all (seven) different patterns A to G in which the air inflow port 16d and at least one or more jet ports 5 to 7 communicate with each other are realized.
Next, an example of a transition mode between the patterns A to G accompanying the rotational driving of the first disk 21 will be described.

  First, it is assumed that the first and second disks 21 and 22 are at a rotation angle in the pattern A as shown in FIG. At this time, the engaging protrusion 21c of the first disk 21 is set so as to come into contact with one end in the circumferential direction of the engaging hole 22c on the side rotating in the counterclockwise direction shown in the figure (FIG. 3). And FIG. 4). Therefore, when the first disk 21 is driven to rotate in the counterclockwise direction in the figure in this state, the first disk 21 can be integrally rotated with the second disk 22. On the other hand, when the first disk 21 is driven to rotate in the clockwise direction shown in the drawing, the first disk 21 can rotate relative to the second disk 22 within a range of “180 °”.

  Here, when the first disk 21 is rotated by “90 °” in the clockwise direction shown in the figure and is rotated relative to the second disk 22 (and the lid body 23), as shown in FIG. The rotation angle of the first disk 21 becomes “270 °” and the pattern B is entered.

  Subsequently, when the first disk 21 is further rotated by “90 °” in the clockwise direction shown in the figure and is rotated relative to the second disk 22 (and the lid body 23), as shown in FIG. Then, the rotation angle of the first disk 21 becomes “180 °” and the pattern C is entered. At this time, the engagement protrusion 21c of the first disk 21 contacts the other end in the circumferential direction of the engagement hole 22c on the side rotating in the clockwise direction in the figure.

  In this state, when the first disk 21 is further rotated by “90 °” in the clockwise direction shown in the figure and rotated integrally with the second disk 22, the rotation of the first disk 21 is performed as shown in FIG. The angle becomes “90 °” and the rotation angle of the second disk 22 becomes “270 °”, and the pattern F is entered.

  Subsequently, when the first disk 21 is rotated (reversely driven) by “90 °” in the clockwise direction shown in the figure and is relatively rotated with respect to the second disk 22 (and the lid body 23), FIG. As shown, the rotation angle of the first disk 21 is “180 °” and the pattern G is entered.

  Further, in the state of the pattern F, the first disk 21 is further rotated by “90 °” in the clockwise direction in the figure to rotate integrally with the second disk 22, and the first disk 21 continues to rotate in the clockwise direction in the figure. Then, when the second disk 22 (and the lid 23) is rotated relative to the second disk 22 (and the lid 23), the rotation angle of the first disk 21 is changed as shown in FIG. At the same time as “90 °”, the rotation angle of the second disk 22 becomes “180 °” and the pattern E is entered.

  On the other hand, when the first disk 21 is rotated by “90 °” in the illustrated counterclockwise direction in the state of the pattern A and is rotated integrally with the second disk 22, as shown in FIG. The rotation angle of the disk 21 becomes “90 °” and the rotation angle of the second disk 22 becomes “90 °”, and the pattern D is entered.

  As described above, by using the integral rotation and the relative rotation of the second disk 22 accompanying the rotation drive of the first disk 21, it is possible to shift to all the patterns A to G. The driving mode of the first disk 21 and the order of transfer of the patterns A to G are only examples, and the first pattern 21 corresponds to the current patterns A to G and the patterns A to G to be transferred. The driving mode of the disk 21 may be changed. However, it is preferable to minimize the amount of rotation of the first disk 21 required for the transition between the patterns A to G, that is, the driving amount (number of times of driving) of the stepping motor 17.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) In the present embodiment, the first disk 21 is relative to the second disk 22 in a state in which the second through holes 32 a to 32 c and the first to third jet outlets 5 to 7 are selectively communicated. Rotating to selectively communicate the air inlet 16d and the first to third jet outlets 5 to 7 in one pattern via the first through holes 31a to 31c and the second through holes 32a to 32c, or In another state where the first and second disks 21 and 22 are integrally rotated to switch the selective communication between the second through holes 32a to 32c and the first to third ejection ports 5 to 7, the second disk 22 The first disk 21 is rotated relative to the air inlet 16d and the first to third jet outlets 5 to 7 through the first through holes 31a to 31c and the second through holes 32a to 32c. It is possible to selectively communicate with patterns. In this way, by using two disks (first and second disks 21 and 22) and changing the combination of the respective rotational positions, the air inlet 16d and the first to third outlets 5 to 7 are changed. The selective communication through the first through holes 31a to 31c and the second through holes 32a to 32c is switched, and more air flows into the air inlet 16d from the first to third jet outlets 5 to 7. Can be drained in a pattern. Further, by adopting an extremely simple configuration using two disks (first and second disks 21 and 22) stacked on the lid 23, the entire apparatus can be further downsized.

  (2) In this embodiment, the three jet holes 5-7, the 1st through-holes 31a-31c, and the 2nd through-holes 32a-32c are each arrange | positioned by the mutually same predetermined angle (90 degree) space | interval. The angle range in which the first disk 21 is allowed to rotate relative to the second disk 22 is set to be twice (180 °) the predetermined angle. Accordingly, by combining the relative rotation of the first disk 21 with respect to the second disk 22 and the integral rotation of the first and second disks 21, 22, one of the first and second disks 21, 22 can be used as one jet outlet. Communication of 5-7 can be interrupted. Accordingly, the communication between the air inlet 16d and the plurality (three) of the outlets 5-7 via the first through holes 31a to 31c and the second through holes 32a to 32c is at least one of the outlets 5 to 5. 7 can be realized by all different patterns (number of patterns: 7 = 2 ^ 3-1) communicating with each other. Thereby, it is possible to efficiently obtain more communication patterns between the air inlet 16d and the plurality (three) of the outlets 5 to 7 with a small number of outlets 5 to 7 and the like. It can be further downsized.

  (3) In the present embodiment, the outlets 5 to 7, the first through holes 31 a to 31 c, and the second through holes 32 a to 32 c are 270 ° (=) of the lid body 23, the first disk 21, and the second disk 22, respectively. It is disposed in an angle range of 90 ° × 3). Therefore, the communication of any one of the outlets 5 to 7 can be blocked in the remaining 90 ° angle range of the first and second disks 21 and 22. Thus, the nozzles 5 to 7, the first through holes 31 a to 31 c, and the second through holes 32 a to 32 c are disposed by effectively using the space of the lid body 23, the first disk 21, and the second disk 22. Thus, the opening areas of these jet outlets 5 to 7, the first through holes 31a to 31c, and the second through holes 32a to 32c can be made larger.

  (4) In the present embodiment, the second disk 22 is sandwiched between the first disk 21 and the lid 23, and holding means (projections 22 d and grooves) provided between the second disk 22 and the lid 23. 23c). Accordingly, it is possible to suppress a positional shift (accompanying) that occurs in the second disk 22 when the first disk 21 is relatively rotated with respect to the second disk 22, and it is possible to improve flow path switching reliability.

  (5) In the present embodiment, the holding means provided between the second disk 22 and the lid body 23 can have a very simple configuration including the protrusion 22d and the groove 23c into which the protrusion 22d can be fitted. .

  (6) In the present embodiment, it is possible to provide the bed 1 with a ventilation function that allows the air that has flowed into the air inlet 16d to flow out from the plurality of jets 5 to 7 in more patterns to be ventilated. .

In addition, you may change the said embodiment as follows.
-In the said embodiment, the 1st disk 21 or the 2nd disk 22 may not be a disk shape, if any one of the jet nozzles 5-7 can be interrupted | blocked.

In the embodiment, the lid body 23 may not be a disk shape. For example, the lid body 23 may be integrally formed with the cover 19.
In the above embodiment, the air inlet 16d does not necessarily support the first and second disks 21 and 22. In this case, the air inlet 16d only needs to have another cylindrical shape such as a square cylindrical shape.

  -In the said embodiment, the opening area of any one jet outlet 5-7 may differ from the opening area of the remaining jet nozzles 5-7. Or the opening area of the 1st-3rd jet nozzles 5-7 may mutually differ.

  -In the said embodiment, you may form the jet nozzle which shifted | deviated to the cover body 23 to the radial direction centering on the bearing hole 23a with respect to the jet nozzles 5-7. In this case, the first and second disks 21 and 22 may be formed with through holes that can selectively communicate between the air inlet 16d and the jet outlet.

  -In the said embodiment, if the number of the jet nozzles (fluid outflow part) arrange | positioned at the cover body 23 is arranged in multiple numbers by the circumferential direction, what number may be sufficient as it. Moreover, these jet nozzles do not necessarily need to be arranged at predetermined angular intervals. In short, it is only necessary that the first and second discs 21 and 22 have the air inlet 16d and the first and second through holes that can selectively communicate with each other.

  In the embodiment described above, the second disk 22 sandwiched between the first disk 21 and the lid body 23 may not be pivotally supported by the lid body 23 (bearing hole 23a). In this case, the second disk 22 may be pivotally supported at the air inlet 16d.

  -In the said embodiment, you may change the order of lamination | stacking of the 1st and 2nd discs 21 and 22 and the cover body 23. FIG. For example, the first disk 21 may be sandwiched between the second disk 22 and the lid body 23.

  In the above embodiment, the engagement recess (engagement hole 22c) into which the engagement protrusion 21c is loosely inserted does not necessarily pass through the second disk 22, for example, upward from the lower surface of the second disk 22 It may be a groove-like engaging recess provided in a recess.

In the above embodiment, the first disk 21 may be provided with an engagement recess (engagement hole), and the second disk 22 may be provided with an engagement protrusion that is loosely inserted into the engagement recess.
In the embodiment, a brush motor or the like may be employed as a drive source as long as the rotation angle of the first disk 21 can be controlled.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) In the flow path switching device according to claim 4,
The holding means is
A protrusion protruding from one of the second disk and the lid;
A flow path switching device, comprising: a groove formed on the other of the second disk and the lid and capable of receiving the protrusion. According to this configuration, the holding means can be configured to be extremely simple consisting of the protrusion and the groove.

  (B) A bed with a ventilation function, comprising the flow path switching device according to any one of claims 1 to 4 and (A). According to this configuration, it is possible to provide a bed with a ventilation function capable of ventilating air as fluid that has flowed into the fluid inflow portion from a plurality of fluid outflow portions in more patterns.

  5-7: Jet port (fluid outflow portion), 16d: Air inflow port (fluid inflow portion), 17 ... Stepping motor (drive source), 21 ... First disc, 21c ... Engagement projection, 22 ... Second disc 22c ... engagement hole (engagement recess), 22d ... projection (holding means), 23 ... lid, 23c ... groove (holding means), 31a-31c ... first through hole, 32a-32c ... second penetration hole.

Claims (4)

A cylindrical fluid inflow portion into which the fluid flows, and
A plurality of fluid outflow portions that can flow out the fluid that has flowed into the fluid inflow portion are arranged in the circumferential direction, and a lid that closes the downstream opening end of the fluid inflow portion;
A first disk and a second disk, which are rotatably stacked on the lid and have a plurality of first through holes and second through holes arranged in parallel in the circumferential direction, which can selectively communicate with the plurality of fluid outflow portions. A disc,
A drive source for rotationally driving the first disk;
An engagement protrusion provided on one of the first and second disks;
Provided on the other of the first and second disks, the engagement protrusion is loosely inserted to allow relative rotation of the first disk with respect to the second disk in a predetermined angle range and the predetermined angle. An engagement recess engaged with the engagement protrusion so that the first and second disks rotate integrally at the end of the range,
In a state where the plurality of second through holes and the plurality of fluid outflow portions are selectively in communication, the first disc is relatively rotated with respect to the second disc, and the fluid inflow portion and the plurality of the plurality of fluid outflow portions are Selectively communicating with the fluid outflow portion in one pattern through the first and second through holes;
The first and second discs are rotated together to switch the selective communication between the plurality of second through holes and the plurality of fluid outflow portions. A flow path switching device characterized in that the fluid inflow portion and the plurality of fluid outflow portions are selectively communicated in another pattern through the first and second through holes by relatively rotating a disk. . In the flow path switching device according to claim 1,
The fluid outflow portion, the first through-hole, and the second through-hole are each disposed at the same predetermined angular interval.
The flow path switching device according to claim 1, wherein the predetermined angle range in which the first disk is allowed to rotate relative to the second disk is set to twice the predetermined angle. In the flow path switching device according to claim 2,
The flow path switching device according to claim 1, wherein the predetermined angle is 90 °. In the flow path switching device according to any one of claims 1 to 3,
The second disk is sandwiched between the first disk and the lid;
And a holding means provided between the second disk and the lid, and configured to prevent the second disk from rotating in a state where the plurality of second through holes and the plurality of fluid outflow portions are selectively communicated with each other. A flow path switching device.

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