Water flow switching device and sprinkler containing the same

Abstract

This invention relates to a water flow switching device for use in a sprinkler. The sprinkler includes a movable cylinder and a connecting seat, which are connected to each other to form an internal space. The connecting seat has a first water outlet and a second water outlet communicating with the internal space. The water flow switching device includes a swing rod, an elastic element, and a stop element. The swing rod is swayable between a first position and a second position and is disposed in the internal space. The swing rod includes a chamber that extends along an extension direction. The elastic element is telescopically disposed in the chamber along the extension direction. The stop element is connected to the elastic element to form a synchronous relationship and is movably inserted into the chamber along the extension direction. The stop element includes a first stop portion and a second stop portion. When the swing rod is in the first position, the first stop portion covers the first water outlet. When the swing rod is in the second position, the second stop portion covers the second water outlet.

Claims

1. A water flow switching device for use in a sprinkler, the sprinkler comprising a movable cylinder and a connecting seat, the movable cylinder and the connecting seat being assembled together to form an internal space, the connecting seat having a first water outlet and a second water outlet communicating with the internal space, the water flow switching device comprising: A swing arm, swayable to a first position and a second position, is disposed in the internal space and includes a chamber extending in an extending direction; an elastic member, telescopically disposed in the chamber along the extending direction; and a stop member, connected to the elastic member to form a co-movement relationship, movably inserted into the chamber along the extending direction, including a first stop and a second stop. When the swing arm is in the first position, the first stop covers the first water outlet, and when the swing arm is in the second position, the second stop covers the second water outlet.

2. The water flow switching device as claimed in claim 1, wherein the rocker arm further includes a ring sidewall that encloses a communicating chamber and a connector, a portion of the stop member and the elastic member entering the chamber through the connector, and the ring sidewall stops the elastic member in the transverse extension direction.

3. The water flow switching device as claimed in claim 1, wherein the stop member further includes a first insertion portion and a second insertion portion, the average radial dimension of the first insertion portion being greater than the average radial dimension of the second insertion portion, the second insertion portion protruding from the first insertion portion and forming a stepped surface at the connection point, and the elastic member being sleeved on the second insertion portion and abutting against the stepped surface.

4. The water flow switching device as claimed in claim 1, wherein the sprinkler has an additional abutting protrusion between the first water outlet and the second water outlet, and the stop member further includes a locking portion disposed between the first stop portion and the second stop portion, wherein a first locking groove is defined between the locking portion and the first stop portion, and a second locking groove is defined between the locking portion and the second stop portion; wherein, When the lever is in the first position, the abutment protrusion is inserted into the first slot. When the lever is in the second position, the abutment protrusion is inserted into the second slot. During the swinging process between the first and second positions, the locking part abuts against the abutment protrusion to force the stop to move deeper into the cavity and compress the elastic member until the locking part crosses the abutment protrusion and the elastic member springs against the stop and moves in the direction of moving out of the cavity.

5. The water flow switching device as claimed in claim 4, wherein the locking part, the first stop part, and the second stop part are connected to each other in a fixed relative position.

6. The water flow switching device as claimed in claim 1, wherein the stop member and the swing arm are coaxially configured, and the stop member cannot be deflected relative to the swing arm.

7. The water flow switching device as claimed in claim 5, wherein the rocker arm further includes an annular sidewall that encloses a communicating chamber and a connector, a portion of the stop member and the elastic member enter the chamber through the connector, and the annular sidewall stops the elastic member in the transverse extension direction; the stop member further includes a first insertion portion and a second insertion portion, the average radial dimension of the first insertion portion being larger than the average radial dimension of the second insertion portion, the second insertion portion protruding from the first insertion portion and forming a stepped surface at the connection point, the elastic member being sleeved on the second insertion portion and abutting against the stepped surface; the stop member and the rocker arm are coaxially configured, and the stop member cannot be deflected relative to the rocker arm; the cross-sectional outer contour of the first insertion portion is rectangular. The cross-sectional outer contour of the second insertion part is circular; the contour of the first insertion part is adapted to the contour of the cavity; the radial dimension of the first insertion part is a first dimension, the radial dimension of the second insertion part is a second dimension, and the ratio of the second dimension to the first dimension is between 0.3 and 0.6; the extension and retraction of the elastic element is equal to the protrusion of the locking part from the first locking groove, the protrusion of the locking part is defined as a third dimension, the length of the cavity is a fourth dimension, and the ratio of the fourth dimension to the third dimension is greater than 50; the rocker arm further includes a rod body, a plurality of first ribs and a plurality of second ribs, the cavity is recessed in the rod body, and the plurality of first ribs and the plurality of second ribs protrude from the rod body at equal angular intervals, wherein... In the radial direction of the rod, the protrusion of each of the second ribs is greater than that of each of the first ribs; in the axial direction of the rod, the length of each of the second ribs is greater than that of each of the first ribs; the plurality of first ribs and the plurality of second ribs make the outer contour of the swing rod non-circular; the plurality of second ribs are arranged on opposite sides in the swing direction of the swing rod; the ring sidewall closes the chamber in the transverse direction of the elastic member's extension and contraction.

8. A sprinkler system, comprising: One water inlet connector; A main body comprising a movable cylinder and a connecting seat, the movable cylinder and the connecting seat being assembled together to form an internal space, the movable cylinder being rotatably fitted onto a water inlet connector, the connecting seat being provided with a first water outlet and a second water outlet communicating with the internal space; a plurality of gear sets being meshed and positioned in the internal space and meshing with the water inlet connector; a water flow switching device as described in any one of claims 1 to 7, housed in the internal space; and an impeller being located outside the internal space and assembled on the connecting seat, meshing with the plurality of gear sets to form a linkage relationship, and being driven to rotate by fluid flowing out of the first water outlet and the second water outlet.

9. The sprinkler as claimed in claim 8, wherein each gear set includes a plurality of gears and a shaft through which the plurality of gears pass; wherein, The shaft includes at least one abutment portion that abuts against at least one gear in the axial direction of the shaft to provide support force to the at least one gear.

10. The sprinkler as claimed in claim 9, wherein the shaft further includes a main body, the at least one abutment portion is integrally formed with the main body, the main body passes through the plurality of gears; the number of the at least one abutment portion is one, the main body includes a small diameter section and a large diameter section coaxially connected, the small diameter section and the large diameter section forming the abutment portion at their connection; the gear abutting against the abutment portion is defined as a first gear, and another gear not abutting against the abutment portion but adjacent to the first gear is defined as a second gear, the second gear and the first gear are respectively located on opposite sides of the abutment portion, the first gear and the second gear maintaining a distance between them.

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