An impingement sprinkler has a main body, a rotation guiding mechanism, a slant adjustment mechanism, a turning control component and a rotation limiting mechanism. The rotation limiting mechanism has a first limiting piece and a second limiting piece. The main body has a frame portion and a sprinkler head. The rotation guiding mechanism includes a torsional spring and a swinging piece. The swinging piece has a first contacting portion. The turning control component has a second contacting piece and a poking rod portion. The poking rod portion always contacts the stopping portions such that the first and second limiting pieces interfere with the poking rod portion.

CROSS-REFERENCE TO RELATED U.S. APPLICATIONS

Not applicable.

Not applicable.

NAMES OF PARTIES TO A JOINT RESEARCH AGREEMENT

Not applicable.

REFERENCE TO AN APPENDIX SUBMITTED ON COMPACT DISC

Not applicable.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to an impingement sprinkler, and more particularly to an innovative one which, through the first and second stopping portions extensionally formed on the first and second limiting pieces, can substantially execute the turning action when the slanting angle of the main body is adjusted.

Impingement sprinklers are widely used in large-area crop irrigation and gardening because impingement sprinklers are capable of recycling or reciprocating irrigation in a circular area coverage. To further enhance the utility of the impingement sprinklers, manufacturers have developed impingement sprinklers with an adjustable slanting angle. By adjusting upward or downward, the sprinkling angle of the impingement sprinkler can be changed (i.e., when slanting upward, the sprinkling distance of the parabolic water flow is large, while when slanting downward, the distance is small), so as to meet diversified requirements of the users. What is discussed in the present invention is to improve the turning mechanism of such impingement sprinklers with adjustable slanting angle.

The structure of a conventional impingement sprinkler is usually made up of a main body, a water connection pipe provided on the bottom of the main body, a swinging frame, a turning mechanism, and a slanting and turning structure arranged on the main body. The turning structure usually comprises two rotary limiting catches configured outside the water connection pipe and a poke rod configured on one side of the main body and extending downward to be between the two limiting catches. When the main body starts to rotate under the drive of the swinging frame, the poke rod will be driven to contact one of the limiting catches, so that the poke rod will deflect and drive the inner mechanism to turn the main body. However, as the poke rod of such a conventional impingement sprinkler is located between the two limiting catches, and there are no other limiting structures around the two limiting catches, when the main body slants upward, there is a possibility that the poke rod may go beyond the limiting catches and cannot touch each other, and consequently, the main body loses the turning function and cannot conduct the recycling irrigation. This will naturally cause uneven irrigation and the convenient and practical functions of the impingement sprinkler are greatly reduced.

Thus, to overcome the aforementioned problems of the prior art, it would be an advancement if the art to provide an improved structure that can significantly improve the efficacy.

Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.

BRIEF SUMMARY OF THE INVENTION

The main characteristic of the “impingement sprinkler” disclosed by the present invention is that the first and second limiting pieces of the rotation limiting mechanism are configured with first and second stopping portions extending along the swinging path, so that when the main body slants upward or downward, the poking rod portion can always contact the first and second stopping portions, and therefore the first or second limiting pieces can interfere with the poking rod portion and maintain the function of the main body to shift turning directions. In this way, no matter whether the main body slants upward or downward, it can substantially execute the turning action to sprinkle the surroundings. Hence, the practical utility and usage convenience of the product is greatly enhanced.

DETAILED DESCRIPTION OF THE INVENTION

FIGS. 1 to 5depict a preferred embodiment of the impingement sprinkler of the present invention. However, such an embodiment is illustrative only and is not intending to limit the scope of patent application.

The impingement sprinkler05includes a main body10, comprising a frame portion11, and a sprinkler head12configured at a position close to the lower edge of the frame portion11, wherein the lower end of the main body10has an axle tube101, and the axle tube101can be attached with an attaching seat13.

A rotation guiding mechanism20is configured on the frame portion11of the main body10and comprises a torsional spring21and a swinging piece22, wherein one side of the swinging piece22has a first contacting portion23, and the swinging piece22corresponds to the interval on the front end of the sprinkler head12. Wherein, the attaching seat13on the lower end of the main body10is to be connected with a water pipe (not shown in the drawing), so that water source can go through the attaching seat13into the axle tube101and frame portion11, and then spray out from the sprinkler head12, and the water sprinkled out will drive the swinging piece22for reciprocating swinging (the swinging state of the swinging piece22is not shown in the drawing), and consequently drive the main body10to turn.

A slant adjustment mechanism30is provided between the frame portion11and attaching seat13of the main body10, so that the slanting angle of the main body10can be adjusted and the water sprinkling angle of the sprinkler head12can be changed (refer toFIGS. 4,5).

A turning control component40is configured on one side of the frame portion11of the main body10, and comprises a second contacting portion41and a poking rod portion42configured on the lower side of the second contacting portion41, capable of swinging and extending downward. Movement of the poking rod portion42will drive the second contacting portion41and first contacting portion23to become aligned or misaligned, so that the turning direction of the main body10can be changed, and when the slanting angle of the main body10is adjusted, the poking rod portion42will slant along with the main body10and forms a swinging path A (refer toFIGS. 4,5). Moreover, the first contacting portion23disclosed in the present embodiment is configured on the bottom of the swinging piece22in the shape of a hooking block, while the second contacting portion41is Configured on one side of the frame portion11of the main body10in the shape of a long block, and one end of the second contacting portion41is formed with a hooking portion43aligned to the first contacting portion23. Moreover, the center of the second contacting portion41is configured with as pivot44(only shown inFIG. 3), and through left or right swinging of the poking rod portion42, the second contacting portion41can be controlled to swing around the pivot44, so that the hook portion43will be elevated to be aligned with the first contacting portion23or lowered to be misaligned with the first contacting portion23(as shown inFIG. 3, the hook portion43is aligned with the first stopping portion23).

A rotation limiting mechanism50is provided on a preset position of the attaching seat13to limit and interfere with the poking rod portion42, further comprising: a first limiting piece60, attached to the outside of the attaching seat13and defining, an attaching portion61and a first stopping portion62extending from one side of the attaching portion61to the swinging path A of the poking rod portion42; and a second limiting piece70, attached to the outside of the attaching seat13and located over or beneath the first limiting piece60. The second limiting piece70forms a sleeving portion71and a second stopping portion72extending from one side of the sleeving portion71to the swinging path A of the poking rod portion42, wherein the first and second limiting pieces60,70can both be adjusted by rotating around the attaching seat13(refer toFIGS. 6,7), so as to limit the rotation range of the main body10.

In this way, through the first and second stopping portions62,72configured on the first and second limiting pieces60,70, when the main body10slants upward or downward, the poking rod portion42can always contact the first and second stopping portions62,72, so that the first limiting piece60or second limiting piece70can interfere with the poking rod portion42to maintain the function of the main body10to shift its turning direction, and avoid the problem that the main body10cannot shift its turning direction because the poking rod portion42cannot contact the first and second limiting pieces60,70when the main body10slants upward or downward.

Below is a description of the implementation and operation of the present invention:

Referring toFIG. 4, the first and second stopping portions62,72configured on the first and second limiting pieces60,70disclosed in the present invention are in a curved and extending form, and the curve extends along the swinging path A formed by the poking rod portion42when the main body10is slanted, so that not matter the main body10is slanted upward or downward, the poking rod portion42can always contact the first and second stopping portions62,72, or, as shown in FIG.8, the first and second stopping portions62,72are in a slanted and extending form, the same function can be achieved.

Referring toFIGS. 6 and 7, in the present embodiment, the inner side of the attaching portion61on the first limiting piece60and the sleeving portion71on the second limiting piece70are configured with a plurality of positioning teeth80distributed with intervals, and the outer side of the attaching seat13is correspondingly configured with at least one edge81, so that when the first and second limiting pieces60,70are adjusted, they can be positioned by stages.

Referring toFIGS. 2 and 4, the slant adjustment mechanism30comprises an axle seat31configured on top of the attaching seat13and a pivot portion32which can be correspondingly attached to the axle seat31. Wherein, the axle seat31can be attached to one side of the frame portion11of the main body10, and the pivot portion32can go through the frame portion11and be pivoted with the axle seat31, so that the main body10can be rotated around the pivot portion32, and the sprinkling angle of the sprinkler head12can be changed. When the main body10is slanted upward (referring toFIGS. 4,7), as the first and second stopping portions62,72of the first and second limiting pieces52,53are extending along the swinging path A of the poking rod portion42, no matter the main body10is adjusted to any slanting angle, the poking rod portion42can always contact and interfere with the first and second stopping portions62,72, or, as shown inFIG. 5, when the main body10is slanted downward, the poking rod portion42can also contact and interfere with the first and second stopping portions62,72. Therefore, the main body10can always maintain the function to shift its rotation direction, and can substantially execute the sprinkling action in the surrounding area.