JP5619053B2 - Watering nozzle - Google Patents

Description

  The present invention relates to a watering nozzle that is mainly used for gardening, cleaning, agriculture, etc. at home, etc., and is connected to the tip of a water supply facility such as a water supply via a hose, and is operated by a user in particular. It relates to a watering nozzle.

  At home, watering nozzles that are attached to the tip of a hose and can be arbitrarily switched between watering and water stopping are widely used for gardening, agriculture, cleaning, and the like. Such a watering nozzle receives water from a water supply facility such as a water supply via a hose and sprays water from a watering port formed at the tip.

As shown in FIG. 8, the conventional watering nozzle 25 forms a water flow path 10 connecting the nozzle body 6 from the proximal inlet to the front water spray 5a, and an on-off valve seat is formed in this flow path. The on-off valve which consists of 7a and the on-off valve body 13 was provided.
Further, an operation lever 15 is attached in front of the nozzle body 6 (water pipe 7) so as to be able to approach and separate, and the on-off valve body 13 is moved closer to and away from the on-off valve seat 7a in conjunction with the approach and separation of the operation lever 15. There was something to open and close.

In the watering nozzle 25, a relay lever 26 is disposed between the operation lever 15 and the nozzle body 6 in order to link the operation lever 15 and the opening / closing valve.
As shown in FIG. 9, the relay lever 26 formed in a substantially L shape in a side view forms a fulcrum portion 27 that is rotatably supported by the nozzle body 6 in a bent portion, and a force point portion that contacts the operation lever 15. 28 is formed at one end, and an action point portion 29 that abuts on the on-off valve body 13 is formed at the other end.
When the user grasps the operation lever 15 with such a watering nozzle, the force point portion 28 is pushed by the inner surface of the operation lever 15 and the relay lever 26 rotates, and the action point portion 29 opens and closes the on-off valve body 13. It could be released by pushing away from the seat 7a.

The tap water pressure of a faucet in a general home or the like is about 0.15 MPa, the lower limit may be about 0.05 MPa, and the upper limit may be as high as 0.74 MPa.
In the conventional watering nozzle 25, since the hydrostatic pressure and the load proportional to the tap water pressure are applied to the on-off valve body 13 at the valve closed position (water stop position), when switching from the water stop position to the water flow, There was a problem that the operating load became heavy.

Generally, the operating load of the operation lever 15 can be reduced by increasing the distance from the fulcrum part 27 to the force point part 28.
However, in order to provide a large flow rate on / off valve in which the on / off valve body 13 does not impede the flow of water in the fully open position, it is necessary to increase the separation (pressing) amount of the on / off valve body 13. There are restrictions on the angle at which the relay lever 26 is attached to the nozzle body 6 at the water stop position.
If the distance from the fulcrum part 27 to the force point part 28 is lengthened under such a restriction, the relay lever 16 becomes larger and protrudes in front of the watering nozzle 25, so that the operation lever 15 covering this also moves forward. Therefore, there is a problem that operability such as finger hooking deteriorates.

  Further, when the distance from the fulcrum portion 27 to the force point portion 28 is increased, the pressing amount of the on-off valve body 13 with respect to the rotation amount of the operating lever 15 is reduced, so that the operating lever necessary for opening the on-off valve from water stop to fully open There is also a problem that the gripping amount (stroke) of 15 becomes long and the operability deteriorates.

In order to reduce the operating load of the operation lever at the water stop position, in the watering nozzle of Patent Document 1, an annular packing is loosely fitted on the outer periphery of the valve body portion at the downstream end of the on-off valve body, and an E-ring is attached to make the ring By preventing the packing from coming off, the annular packing is slidably attached to the on-off valve body by a predetermined length in the upstream and downstream direction.
Thus, the watering nozzle is formed with a first valve in which the annular packing approaches and separates from the opening / closing valve seat of the nozzle body, and a second valve in which the annular packing and the valve body portion of the opening / closing valve body approach and separate. .

  In the water stop position where the on-off valve body is urged by the on-off valve seat and the first and second valves are closed, a large hydrostatic pressure is applied to the valve body. First, the second valve is opened, allowing water to flow through the gap between the annular packing and the on-off valve body, and then the pressure is relieved. I was able to reduce it.

JP 2001-149819 A

However, the watering nozzle of Patent Document 1 requires an annular packing made of a special material to reduce the operating load of the operation lever, and an E-ring for preventing the annular packing from being detached, and needs to be assembled. Therefore, material costs and manufacturing costs have increased.
In addition, when the tap water pressure is high, the valve body of the on-off valve body is strongly biting into the annular packing in the second valve due to the water pressure when the water stops, and also when the second valve is opened. There was a problem that a large force was required and the operating load of the control lever could not be reduced much.

  The present invention has been made to solve the above problems, and it is an object of the present invention to provide a watering nozzle that can effectively reduce the operating load of the operation lever even at a high water pressure state at a water stop position at low cost. And

In the present invention, means for solving the above problems are as follows.
1st invention arrange | positions in the path | route of the nozzle main body which formed the flow path of the water which connects from an inlet to a water sprinkle inside, the operation lever attached to this nozzle main body so that an approach and separation | spacing were possible An opening / closing valve that opens and closes the flow path, a fulcrum portion that is disposed between the operation lever and the opening / closing valve and is rotatably supported by the nozzle body, a force point portion that contacts the operation lever, and the A water spray nozzle that opens and closes the on-off valve by rotating the relay lever according to a positional relationship between the operation lever and the nozzle body. The relay lever is provided with two or more force point portions different in distance from the fulcrum portion, and the force point portion formed farthest from the fulcrum portion at the water stop position of the on-off valve is Abuts the operation lever Allowed, openness of the opening and closing valve in the larger position than a predetermined degree, characterized in that is brought into contact with another of the force input portion to the operating lever.

  According to a second aspect of the present invention, the relay lever is provided with two or more action point portions having different distances from the fulcrum portion, and is formed closest to the fulcrum portion at the water stop position of the on-off valve. The action point is brought into contact with the on-off valve, and the other action point is brought into contact with the on-off valve at a position where the opening degree of the on-off valve is larger than a predetermined degree.

  In a third aspect of the present invention, the relay lever is provided with a first force point portion far from the fulcrum portion and a second force point portion close to the fulcrum portion, and a distance from the fulcrum portion to the second force point portion / the fulcrum point. The distance from the part to the first force point part is 0.20 to 0.80.

According to the first aspect of the present invention, the relay lever is provided with two or more force point portions having different distances from the fulcrum portion, and is formed farthest from the fulcrum portion at the water stop position of the on-off valve. By causing the force point portion thus brought into contact with the operation lever, the force point portion farthest from the fulcrum portion is brought into contact with the operation lever at the high water pressure stop position, thereby reducing the operating load of the operation lever.
Further, when the opening degree of the on-off valve is larger than a predetermined degree, the other force point portion is brought into contact with the operation lever so that the other force point portion close to the fulcrum portion comes into contact with the operation lever and opens and closes. The operation amount of the valve can be increased, and the on-off valve can be effectively opened and closed with a small stroke amount of the operation lever.

According to a second aspect of the present invention, the relay lever is provided with two or more action point portions having different distances from the fulcrum portion, and is closest to the fulcrum portion at the water stop position of the on-off valve. By causing the formed action point part to abut against the on-off valve, the action point part closest to the fulcrum part contacts the on-off valve at a high water pressure stop position to reduce the operating load of the operating lever. Can do.
In addition, at the position where the opening degree of the on-off valve is larger than a predetermined degree, the other action point part far from the fulcrum part comes into contact with the on-off valve by bringing the other action point part into contact with the on-off valve. Thus, the operation amount of the on-off valve can be increased, and the on-off valve can be effectively opened and closed with a small stroke amount of the operation lever.

According to the third invention, the relay lever is provided with the first force point portion far from the fulcrum portion and the second force point portion close to the fulcrum portion, and the distance / the distance from the fulcrum portion to the second force point portion / When the distance from the fulcrum portion to the first force point portion is 0.20 to 0.80, the operating load at the water stop position is reduced, and the on / off valve is effectively operated with a small stroke of the operation lever. Can be opened and closed.
In order to realize these effects, in the rotation range of the operation lever, the ratio of the region where the first force point part abuts on the operation lever and the region where the second force point part abuts on the operation lever is made appropriate. Can do.

It is a figure which shows the water stop state of the watering nozzle which concerns on 1st embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is an enlarged view of the A section in (a). It is a figure which shows the partial open state of the watering nozzle, (a) is a longitudinal cross-sectional view, (b) is an enlarged view of the B section in (a). It is a figure which shows the full open state of the watering nozzle, (a) is a longitudinal cross-sectional view, (b) is an enlarged view of the C section in (a). It is a figure which shows the on-off valve body of the watering nozzle, (a) is a side view, (b) is the DD sectional view taken on the line in (a). It is a figure which shows the relay lever of the watering nozzle, (a) is a front upper perspective view, (b) is a top view, (c) is a rear upper perspective view, (d) is a front view, (e) is a side view. (F) is a rear view, (g) is a front lower perspective view, (h) is a bottom view, and (i) is a side explanatory view. It is a figure of the water flow pipe which comprises the nozzle main body of the watering nozzle, (a) is a side view, (b) is a front view. It is the elements on larger scale which showed the relay lever vicinity in the water stop state of the watering nozzle. It is a figure which shows the conventional watering nozzle, (a) is a longitudinal cross-sectional view, (b) is the elements on larger scale of an on-off valve. It is a figure which shows the relay lever of the conventional watering nozzle, (a) is a front perspective view, (b) is a back perspective view.

Hereinafter, the watering nozzle which concerns on embodiment of this invention is demonstrated.
This watering nozzle 1 is an instrument that performs watering by being connected to the tip of a water supply facility such as water supply via a hose in horticulture, agriculture, cleaning, and other uses. It is.

As shown in FIG. 1, the watering nozzle 1 includes a grip portion 3 formed in a substantially cylindrical shape extending upward from a base end portion 3a that is connected to a hose or the like to form an inlet 2 for introducing water, and the grip It has a nozzle body 6 that extends forward from the upper end of the portion 3 and has water spouts 5a and 5b formed at the tip, and is formed in a bent shape such as an L shape, a dogleg shape, or a pistol shape as a whole. doing.
A water flow path 10 extending from the introduction port 2 to the water spray ports 5a and 5b is formed in the nozzle body 6.
The nozzle body 6 is formed by connecting a hose nipple 8 and a water discharge head 9 to a bent water pipe 7 and assembling a plurality of covers covering the outer periphery. Alternatively, a plurality of members may be combined for some of them.

The grip part 3 is formed in a substantially cylindrical shape extending upward from the base end part 3a, and can be gripped and handled by the user.
In the base end part 3a of the grip part 3, while providing in the unevenness | corrugation and O ring outer peripheral surface for connecting with the receiving tool (not shown) attached to the hose, the inlet which introduces the water from water supply equipment into the center A hose nipple 8 having an opening 2 is attached below the water pipe 7.
The direction of the grip part 3 may be completely vertical, but is inclined from the vertical direction as shown in FIG. 1 and extends upward in a direction intersecting with the extending direction of the grip part 3. Also good.

The nozzle portion 4 is formed in a substantially cylindrical shape that extends forward from the upper end of the grip portion 3. At the tip of the nozzle part 4, a water discharge head 9 is attached to the tip of the water flow pipe 7.
The water discharge head 9 includes a fixing member 11 connected to the water flow pipe 7 and a screwing member 12 attached to the tip of the fixing member 11 and forming a shower water spout 5a and a straight water spout 5b.
A switching port 11a for flowing water supplied from the water flow pipe 7 to the screwing member 12 side is formed on the peripheral surface of the fixing member 11, and the screwing member 12 moves forward and backward by screwing with respect to the fixing member 11. Attached to be able to. Thereby, the switching port 11a can be selectively communicated with the shower sprinkling port 5a or the straight sprinkling port 5b depending on the position of the screwing member 12 with respect to the fixing member 11, and the shower watering and the straight watering can be switched.

The watering nozzle 1 has an open / close valve that switches between water flow and water stop in the flow path of the water flow pipe 7.
In the on-off valve, an on-off valve body 13 is arranged in the flow path 10 on the grip part 3 side of the water flow pipe 7. As shown in FIG. 4, the on-off valve body 13 is formed in a covered cylindrical shape inscribed in the water flow pipe 7, and a protruding valve body portion 13 a is formed on the top of the lid.

As shown in FIGS. 3B and 4, the valve body portion 13 a is formed in a stepped shape that gradually decreases in diameter as it approaches the tip. The valve body portion 13a may be formed in such a step shape, or may be formed in a substantially conical shape whose diameter gradually decreases as it approaches the tip, or a combination of the step shape and the substantially conical shape. In short, the diameter may be gradually and / or stepwise reduced as it approaches the tip.
As shown in FIG. 3B, an O-ring 13b is attached to the valve body portion 13a to contact the opening / closing valve seat 7a and close the flow path 10.

  As shown in FIGS. 3A and 3B, O-rings 13c and 13c are provided at two locations on the outer peripheral surface of the on-off valve body 13 so that water does not flow on the outer periphery of the on-off valve body 13. A water inlet 13d is opened on the outer peripheral surface above the O-rings 13c and 13c. The water supplied from the base end (downward) of the water flow pipe 7 passes through the inside of the on-off valve body 13 and flows out to the outer periphery from the water flow port 13d and flows downstream. Although only one O-ring 13c may be provided, by arranging a plurality of, for example, two O-rings, the sealing performance can be improved and the movement of the on-off valve body 13 can be made smooth.

1 (a), the valve body 13a of the on-off valve body 13 is formed to have a larger diameter than the on-off valve seat 7a provided on the water flow pipe 7, and is interposed between the hose nipple 8 and the on-off valve body 13. The coil spring 14 is biased toward the open / close valve seat 7a to close the flow path 10 (water stop position).
A positioning flange portion 13e for the O-ring 13c is provided above and below the O-ring 13c on the lower side of the on-off valve body, and the coil spring 14 abuts against the lower end surface of the flange portion 13e to open and close the on-off valve body. 13 is energized.

When the valve body portion 13a is separated from the on-off valve seat 7a against this urging force, the flow path 10 is opened, and water can be sprayed from the water spray ports 5a and 5b (FIGS. 2 and 3).
Since the valve body portion 13a of the on-off valve body 13 is formed in a stepped shape, the flow rate of water passing through the on-off valve gradually increases as the on-off valve body 13a is separated from the on-off valve seat 7a.

As shown in FIG. 1A, an operation lever 15 is attached in front of the grip portion 3 in order to operate the on-off valve body 13. The operation lever 15 is attached to the lower portion of the grip portion 3 with the lower end as a fixed end and the upper end is a free end, so that the user can rotate in the front-rear direction by grasping with a hand holding the grip portion 3. ing.
The operation lever 15 is formed in a shape curved forward, and forms an internal space with the nozzle body 6.

A thermoplastic resin such as POM (polyacetal) or ABS (acrylonitrile butadiene styrene copolymer) can be used as the material of the operation lever 15, and ABS is particularly preferable because it is more excellent in moldability.
Also in this embodiment, ABS is used for such a reason.

As shown in FIG. 1, a bent relay lever 16 is disposed between the operation lever 15 and the nozzle body 6.
As shown in FIG. 5, the relay lever 16 has an arm extending upward and an arm extending rearward, and a pair of cylindrical fulcrums projecting leftward and rightward at the central bent portion. A portion 17 is provided and supported by the fulcrum portion 17 on the water flow pipe 7 of the nozzle body 6 so as to be rotatable.
A first force point portion 18 that abuts on the operation lever 15 is formed at the upper end of the relay lever 16. Further, in the middle of the first force point portion 18 and the fulcrum portion 17, a second force point portion 19 that abuts on the operation lever 15 is projected forward.

In the present embodiment, the distance L1 (see FIG. 1B) from the fulcrum part 17 to the first force point part 18 is set to 40 mm.
L1 is preferably set to 30 to 60 mm.
If L1 is less than 30 mm, the operating load of the operation lever 15 at a high water pressure water stop position becomes too heavy. More preferably, L1 is 35 mm or more.
Further, if L1 is larger than 60 mm, the first force point 18 protrudes forward and upward from the nozzle body 6, and therefore the operation lever 15 covering this needs to be protruded forward. Sexuality will deteriorate. More preferably, L1 is 50 mm or less.

Moreover, in this embodiment, the distance L2 (refer FIG.2 (b)) from the fulcrum part 17 to the 2nd power point part 19 is set to 18 mm.
L2 is preferably set to 10 to 25 mm.
When L2 is less than 10 mm, as the amount of forward protrusion of the second force point portion 19 decreases, the region where the first force point portion 18 contacts the operation lever 15 in the rotation range of the operation lever 15 increases, Since the area where the force point portion 19 abuts on the operation lever 15 is reduced, the gripping amount (stroke) of the operation lever 15 required for moving the on-off valve from the water stop position to the fully open position is lengthened and the operability is deteriorated. End up. Even if the on-off valve is partially opened, the operating load of the operation lever 15 becomes too large. More preferably, L2 is 15 mm or more.
Further, when L2 is larger than 25 mm, the pressing amount of the opening / closing valve body with respect to the rotation amount of the operation lever 15 when the second force point portion 19 is in contact with the operation lever 15 is reduced, and the opening / closing valve is moved from the water stop position. The gripping amount (stroke) of the operation lever 15 required to make the fully open position becomes longer and the operability is deteriorated. More preferably, L2 is 20 mm or less.

In the present embodiment, the ratio L2 / L1 between L1 and L2 is 0.45.
L2 / L1 is preferably 0.20 to 0.80.
If L2 / L1 is less than 0.20, the area where the first force point 18 abuts on the operation lever 15 in the rotation range of the operation lever 15 becomes large, which is necessary to change the open / close valve from the water stop position to the fully open position. The grasping amount (stroke) of the operation lever 15 becomes too large, and the operability is deteriorated. More preferably, L2 / L1 should be 0.30 or more.
Further, when L2 / L1 is larger than 0.80, L2 becomes too large. Therefore, the pressing amount of the on-off valve body with respect to the rotation amount of the operation lever 15 when the second force point portion 19 is in contact with the operation lever 15 As a result, the gripping amount (stroke) of the operation lever 15 required to change the on-off valve from the water stop position to the fully open position becomes longer and the operability deteriorates. More preferably, L2 / L1 should be 0.60 or less.

In the relay lever 16, the tongue piece 21 extends forward and upward in the middle between the first force point portion 18 and the second force point portion 19. While the user rotates the operation lever 15 of the watering nozzle 1, the elastic tongue piece 21 comes into contact with the operation lever 15 and cushions, thereby preventing the relay lever 16 and the operation lever 15 from rattling. As a result, operability is improved. That is, the tongue piece 21 indicates the relative positional relationship between the relay lever 16 and the operation lever 15 in the direction substantially perpendicular to the longitudinal direction of the relay lever 16 when the operation lever 15 of the watering nozzle 1 is rotated. It has an elastic contact function that can be changed while bringing 16 and the operating lever 15 into contact with each other. As for this elastic contact function, an elastically deformable portion may be provided integrally with the relay lever 16 as in the present embodiment, or an elastically deformable portion may be provided integrally with the operation lever 15. An elastic deformation member different from the operation lever 15 may be provided.
At the tip of an arm extending rearward from the fulcrum part 17, an action point part 20 divided into two parts is formed so as to be in contact with the upper end surface of the flange part 13e of the on-off valve body.

In the present embodiment, an angle θ1 (see FIG. 5I) formed by a straight line connecting the fulcrum part 17 and the first force point part 18 and a straight line connecting the fulcrum part 17 and the action point part 20 is set to 108 degrees. Has been.
θ1 is preferably set to 90 to 130 degrees.
When θ1 is less than 90 degrees, it is necessary to lengthen L1 considerably in order to bring the first force point 18 into contact with the operation lever 15 at the water stop position. The relay lever 16 cannot be properly accommodated in the limited internal space, for example, the 18 contacts the nozzle body 6 to inhibit the rotation. More preferably, θ1 is 95 degrees or more, particularly 100 degrees or more.
When θ1 is larger than 130 degrees, the first force point 18 protrudes forward and upward from the nozzle body 6, and therefore the operation lever 15 covering this needs to protrude forward, and operability such as finger hooking. Will get worse. More preferably, θ1 should be 120 degrees or less, particularly 110 degrees or less.

In the present embodiment, an angle θ2 (see FIG. 5 (i)) formed by a straight line connecting the fulcrum part 17 and the second force point part 19 and a straight line connecting the fulcrum part 17 and the action point part 20 is 133 degrees. Is set to
θ2 is preferably set to 110 to 160 degrees.
When θ2 is less than 110 degrees, the pressing amount of the opening / closing valve body with respect to the rotation amount of the operating lever 15 is reduced, and the amount of gripping (stroke) of the operating lever 15 necessary for moving the opening / closing valve from the water stop position to the fully open position. Becomes longer and the operability deteriorates. More preferably, θ2 should be 120 degrees or more, particularly 125 degrees or more.
When θ2 is larger than 160 degrees, the second force point portion 19 protrudes forward and upward from the nozzle body 6, and therefore, the operation lever 15 covering this needs to protrude forward, and operability such as finger hooking. Will get worse. Moreover, there exists a possibility that the intensity | strength of the 2nd force-point part 19 vicinity which protrudes may fall. More preferably, θ2 should be 150 degrees or less, particularly 140 degrees or less.

In the present embodiment, the ratio θ2 / θ1 between the magnitudes of θ1 and θ2 is approximately 1.23.
It is preferable that θ2 / θ1 be 1.03 to 1.60.
When θ2 / θ1 is less than 1.03, the region where the second force point 19 contacts the operation lever 15 in the rotation range of the operation lever 15 becomes too small, so that the on-off valve is changed from the water stop position to the fully open position. Therefore, the gripping amount (stroke) of the operation lever 15 necessary for the operation becomes longer and the operability is deteriorated. More preferably, θ2 / θ1 should be 1.10 or more, particularly 1.20 or more.
When θ2 / θ1 is larger than 1.60, the second force point portion 19 protrudes forward and upward from the nozzle body 6, and therefore, the operation lever 15 covering this needs to protrude forward. Usability will deteriorate. Moreover, there exists a possibility that the intensity | strength of the 2nd force-point part 19 vicinity which protrudes may fall. More preferably, θ2 / θ1 should be 1.50 or less, particularly 1.40 or less.

The relay lever 16 can be made of a thermoplastic resin such as PP (polypropylene), POM, ABS, etc., and has excellent wear resistance and a high elastic modulus. preferable.
Also in this embodiment, POM is used for this reason.

  As shown in FIG. 6 (b), in the water flow pipe 7, an opening 7 b is formed in the front surface of the grip portion 3 side portion so that the action point portion 20 is brought into contact with the on-off valve body 13. In the movable range of the on-off valve body 13, the two O-rings 13 c and 13 c are always positioned so as to sandwich the opening 7 b, so that water does not leak from the opening 7 b to the outside of the water flow pipe 7.

Further, as shown in FIG. 6A, from the left and right edges of the opening 7b, a support plate portion 7c for rotatably supporting the relay lever 16 extends forward, and the fulcrum portion of the relay lever 16 is supported. 17 is inserted through the hole of the support plate portion 7c.
Further, from the vicinity of the proximal end of the water flow pipe 7 on the grip portion 3 side, an operation lever receiver 7d for supporting the operation lever 15 so as to be rotatable extends forward, and the nozzle body 6 including the water flow pipe 7 is included. On the other hand, the operation lever 15 can be attached to be able to approach and separate by turning.

As shown in FIG. 1 (a), on the downstream side of the on-off valve, the flow rate adjusting valve body 23 is provided by rotating the flow rate operating member 22 left and right with the thumb of the hand holding the grip portion 3 by the user. A flow rate adjusting valve for rotation is provided.
In this flow regulating valve, the amount of water spray is finely adjusted by increasing or decreasing the area where the notch formed in the side peripheral surface of the cylindrical flow regulating valve body 23 and the flow path 10 on the nozzle portion 4 side match. can do.

  In the watering nozzle 1, at the valve closed position (water stop position), the valve body portion of the on-off valve body is pressed against the on-off valve seat by the urging force of the coil spring 14 to close the flow path (FIG. 1 ( a)). At this time, the operation lever 15 is positioned at the foremost side of the rotation range, the relay lever 16 abuts against the inner surface of the operation lever 15 at the first force point portion 18, and the flange portion 13 e of the on-off valve body 13 at the action point portion 20. (FIG. 1B).

When the user grasps the operation lever 15 from the water stop position, the opening / closing valve body 13 is separated from the opening / closing valve seat 7a against the biasing force of the coil spring 14 through the rotation of the relay lever 16, and the opening / closing valve is passed through. Can be in a water state.
In the water stop position, a high water pressure consisting of a hydrostatic pressure and a load proportional to the tap water pressure is applied to the on-off valve body, but the first force point portion 18 formed farthest from the fulcrum portion 17 abuts on the operation lever 15. Therefore, the user can open the on-off valve only with a relatively light force.

In the partially opened position in which the operation lever 15 is rotated about 2 degrees from the water stop position, the second force point portion 19 in addition to the first force point portion 18 also abuts the inner surface of the operation lever 15 (FIG. 2B). When grasped, only the second force point portion 19 comes into contact with the inner surface of the operation lever 15 and transmits a force for pressing the on-off valve body 13 (FIG. 3B).
At this time, since the second force point portion 19 close to the fulcrum portion 17 is in contact with the operation lever 15, the valve body portion 13a is relatively separated from the on-off valve seat 7a when the operation lever 15 is rotated by a certain amount. Can be made. Therefore, the gripping amount (stroke) of the operating lever 15 necessary for opening the on-off valve from the partially opened position (FIG. 2) to the fully opened position (FIG. 3) can be reduced, and the operability for the user is improved. improves.
In the conventional watering nozzle 25 shown in FIGS. 8 and 9, the stroke of the operation lever 15 for opening the on-off valve from the water stop position to the fully open position was 11 degrees, but in the watering nozzle 1 of the present embodiment, The stroke of the operation lever 15 for opening from the water stop position to the fully open position could be reduced to 7 degrees.
When the second force point portion 19 close to the fulcrum portion 17 is in contact with the operation lever 15, the distance from the fulcrum portion 17 becomes shorter than the first force point portion 18, so that the valve body portion 13a is moved by the lever. This acts in the direction of increasing the required operating load of the operating lever 15. However, at this time, the on-off valve is partially opened and water flows downstream, and the water pressure to press the valve body 13a against the on-off valve seat is weakened. The working load is not so large.

In the water stop position of the on-off valve shown in FIG. 1, the clearance C1 between the first force point 18 and the nozzle body 6 is set to 18.5 mm.
C1 is preferably set to 15.0 to 25.0 mm.
If C1 is less than 15.0 mm, the on-off valve body 13 cannot be sufficiently separated from the on-off valve seat 7a even if the operating lever 15 is grasped to the limit, and the flow rate of water becomes insufficient. More preferably, C1 should be 16.0 mm or more, particularly 17.5 mm or more.
Further, when C1 is larger than 25.0 mm, the first force point portion 18 protrudes forward of the nozzle body 6, so that the operation lever 15 is inevitably protruded largely forward of the nozzle body 6, and the finger hook or the like. The operability of will deteriorate. More preferably, C1 should be 21.0 mm or less, particularly 19.0 mm or less.

In the switching position between the first force point 18 and the second force point 19 shown in FIG. 2, the clearance C2 between the first force point 18 and the nozzle body 6 is set to 16.0 mm.
C2 is preferably set to 8.0 to 20.0 mm.
When C2 is less than 8.0 mm, the range in which the second force point portion 19 abuts on the operation lever 15 becomes too small, and the gripping amount of the operation lever 15 required to bring the on-off valve from the water stop position to the fully open position. (Stroke) is lengthened and operability is deteriorated. More preferably, C2 should be 10.0 mm or more, particularly 13.0 mm or more.
Further, if C2 is larger than 20.0 mm, C1 is inevitably increased, and the operation lever 15 is projected to the front of the nozzle body 6 and the operability such as finger catching is deteriorated. End up. More preferably, C2 should be 18.0 mm or less, particularly 16.5 mm or less.

In the fully open position of the on-off valve shown in FIG. 3, the clearance C3 between the first force point 18 and the nozzle body 6 is set to 4.7 mm.
C3 is preferably set to 10 mm or less.
If C3 is larger than 10 mm, the on-off valve body 13 cannot be sufficiently separated from the on-off valve seat 7a even at the fully open position, and the flow rate of water becomes insufficient. More preferably, C3 is 8 mm or less, particularly 6.5 mm or less.

In this embodiment, the clearance ratio C3 / C1 between the water stop position and the fully open position is 0.25.
C3 / C1 should be 0.35 or less.
If C3 / C1 is larger than 0.35, the on-off valve body 13 cannot be sufficiently separated from the on-off valve seat 7a even at the fully open position, and the flow rate of water becomes insufficient. More preferably, C3 / C1 should be 0.30 or less.

Further, at the water stop position of the watering nozzle 1, the distance M1 (see FIG. 7) from the fixed end at the lower end, which is the rotation center of the operation lever 15, to the first force point 18 of the relay lever 16 is set to 70 mm. ing.
M1 is preferably set to 55 to 100 mm.
If M1 is less than 55 mm, L1 is also shortened, so that the operating load of the operation lever 15 at the high water pressure stop position becomes heavy, and the operability is deteriorated. More preferably, M1 is 60 mm or more, particularly 65 mm or more.
If M1 is made larger than 100 mm, L1 also becomes longer, so that the gripping amount (stroke) of the operating lever 15 required to move the on-off valve from the water stop position to the partially open position becomes longer and the operability deteriorates. End up. More preferably, M1 is 85 mm or less, particularly 75 mm or less.

Further, at the water stop position of the watering nozzle 1, the distance M2 (see FIG. 7) from the fixed end at the lower end, which is the rotation center of the operation lever 15, to the second force point portion 19 of the relay lever 16 is set to 45 mm. ing.
M2 is preferably set to 30 to 70 mm.
When M2 is less than 30 mm, as the amount of forward protrusion of the second force point portion 19 decreases, the region where the first force point portion 18 abuts on the operation lever 15 in the rotation range of the operation lever 15 increases. Since the area where the force point portion 19 abuts on the operation lever 15 is reduced, the gripping amount (stroke) of the operation lever 15 required for moving the on-off valve from the water stop position to the fully open position is lengthened and the operability is deteriorated. End up. More preferably, M2 is 38 mm or more, particularly 42 mm or more.
If M2 is made larger than 70 mm, M1 will inevitably be increased, and the amount of stroke (stroke) of the operating lever 15 required to move the on / off valve from the water stop position to a partly open position becomes longer. The operability will deteriorate. Moreover, since L2 also becomes large, the gripping amount (stroke) of the operation lever 15 required for moving the on-off valve from the partially open position to the fully open position becomes long, and the operability deteriorates. More preferably, M2 is 60 mm or less, particularly 50 mm or less.

A distance M3 between a fixed end at the lower end serving as a rotation center of the operation lever 15 and a fulcrum portion 17 serving as a rotation center of the relay lever 16 is set to 30 mm.
M3 is preferably set to 10 mm or more.
When M3 is less than 10 mm, the operating load of the operation lever 15 at the high water pressure water stop position becomes heavy. More preferably, M3 is 20 mm or more. Note that if M3 is too large, the watering nozzle is likely to increase in size, so M3 is preferably 60 mm or less, more preferably 50 mm or less, and particularly preferably 40 mm or less.

In the present embodiment, the length ratio M1 / L1 is 1.75.
M1 / L1 is preferably 1.20 to 3.00.
When M1 / L1 is less than 1.20, the operation load at the high water pressure stop position becomes heavy. More preferably, M1 / L1 should be 1.30 or more, particularly 1.50 or more.
If M1 / L1 becomes larger than 3.00, L2 must be set to be small accordingly, and the stroke amount to push down the opening / closing valve body 13 becomes insufficient. It cannot be sufficiently separated from the on-off valve seat 7a, and the flow rate of water becomes insufficient. More preferably, M1 / L1 should be 2.80 or less, particularly 2.00 or less.

In the present embodiment, the length ratio M2 / L2 is 2.49.
M2 / L2 should be 1.40 to 7.00.
When M2 / L2 is less than 1.40, the operating load of the operation lever 15 becomes too heavy even when the on-off valve is partially open. More preferably, M2 / L2 should be 1.50 or more, particularly 2.00 or more.
When M2 / L2 is larger than 7.00, the watering nozzle 1 is enlarged, and operability such as finger hooking is deteriorated. More preferably, M2 / L2 is 6.00 or less, particularly 3.50 or less.

In the watering nozzle 1, the first force point portion 18 far from the fulcrum portion 17 abuts on the operation lever 15 at the valve closed position (water stop position) where the water pressure applied to the valve body is large, thereby reducing the operating load of the operation lever 15. In the partially open position (water flow position) where the water pressure applied to the valve body portion 13a is small, the second force point portion 19 close to the fulcrum portion 17 abuts against the operation lever 15 to increase the pressing amount of the valve body portion 13a. Therefore, the operating load of the operation lever 15 can be effectively reduced and the on-off valve can be opened and closed effectively.
Further, it is not necessary to add special parts compared to the conventional watering nozzle, and it is only necessary to partially change the shape of the relay lever 16, so that the operating load of the operation lever 15 can be reduced at low cost. .

<Second embodiment>
In the first embodiment, the relay lever 16 is provided with the first force point portion 18 and the second force point portion 19, but three or more force point portions having different distances from the fulcrum portion 17 are provided, and the operation lever 15 is moved to the water stop position. From the fulcrum portion 17 to the operation lever 15 in order from the fulcrum portion 17.
Further, when the arm extending upward from the relay lever 16 is formed in a curved shape that protrudes forward, and the operation lever 15 is gripped from the water stop position to the fully open position, the power point portion that contacts the operation lever 15 is You may make it move continuously from the front-end | tip of the said arm to a base end.
In the first embodiment, only the section from the second force point part 19 to the fulcrum part 17 may be formed in a curved shape.

<Third embodiment>
In the first embodiment, the relay lever 16 is provided with the first force point portion 18 and the second force point portion 19, but only one force point portion is formed, and two or more actions having different distances from the fulcrum portion 17 are formed instead. A point portion may be provided.
In this case, after the operating point 15 formed closest to the fulcrum portion 17 is in contact with the on-off valve body at the water stop position and the user grasps the operating lever 15 to partially open the on-off valve. The other action point portions abut on the on-off valve body in order from the one closer to the fulcrum portion 17.
Thereby, like the first embodiment, the operating load of the operation lever 15 can be effectively reduced and the on-off valve can be opened and closed effectively.

<Other variations>
In the first embodiment, the lower end of the operation lever 15 is a fixed end and the upper end is a free end. However, the upper end of the operation lever 15 may be attached to the nozzle body 6 as a fixed end, and the lower end may be a free end.
In this case, in the water stop position, the first force point portion 18 far from the fulcrum portion 17 of the relay lever 16 contacts the operation lever 15 to reduce the operating load of the operation lever 15 and to fix the operation lever 15 to the fixed end. The distance from the (fulcrum point on the operating lever 15) to the contact point with the first force point 18 (the operating point on the operating lever 15) is the distance from the fixed end to the grip portion of the user (the power point on the operating lever 15). Therefore, the operating load of the operation lever 15 can be further reduced.

  Further, when the on-off valve is partially opened and the second force point portion 19 close to the fulcrum portion 17 is in contact with the operation lever 15, the second force point portion 19 from the fixed end of the operation lever 15 (the fulcrum in the operation lever 15). Since the distance to the contact point (the point of action on the operation lever 15) with respect to the distance from the fixed end to the gripping portion of the user (the force point on the operation lever 15) is relatively long, the operation lever 15 is fixed by a certain amount. When rotated, the valve body 13a can be further separated from the on-off valve seat 7a.

  Further, since the operation lever 15 is only required to be movably attached to the nozzle body 6, instead of being attached so as to rotate, for example, it may be attached so as to be slidable back and forth with respect to the nozzle body 6. Good.

DESCRIPTION OF SYMBOLS 1 Sprinkling nozzle 2 Connection port 5a (Shower) Sprinkling port 5b (Straight) Sprinkling port 6 Nozzle body 7 Water flow pipe 7a Opening / closing valve seat 7b Opening 7c Support plate part 13 Opening / closing valve body 13a Valve body part 13b O-ring 13c O-ring 13d Water outlet 13e Flange portion 14 Coil spring 15 Operation lever 16 Relay lever 17 Support point 18 First force point 19 Second force point 20 Action point 21 Tongue piece 25 Water spray nozzle 26 Relay lever 27 Support point 28 Force point 29 Action point

Claims (3)

A nozzle body in which a flow path of water connecting from the inlet to the water spout is formed,
An operation lever attached to the nozzle body so as to be able to approach and separate;
An on-off valve disposed in the flow path for opening and closing the flow path;
A relay lever that is disposed between the operation lever and the on-off valve and has a fulcrum portion that is rotatably supported by the nozzle body, a force point portion that abuts on the operation lever, and an action point portion that abuts on the on-off valve And
The water spray nozzle that opens and closes the on-off valve by rotating the relay lever according to the positional relationship between the operation lever and the nozzle body,
The relay lever is provided with two or more power point portions having different distances from the fulcrum portion,
In the water stop position of the on-off valve, the force point portion that is formed farthest from the fulcrum portion is brought into contact with the operation lever, and at the position where the opening degree of the on-off valve is greater than a predetermined degree, the other force points The watering nozzle characterized by contacting a part with the said operation lever. A nozzle body in which a flow path of water connecting from the inlet to the water spout is formed,
An operation lever attached to the nozzle body so as to be close to and away from
An on-off valve disposed in the flow path for opening and closing the flow path;
A relay lever that is disposed between the operation lever and the on-off valve and has a fulcrum portion that is rotatably supported by the nozzle body, a force point portion that abuts on the operation lever, and an action point portion that abuts on the on-off valve And
The water spray nozzle that opens and closes the on-off valve by rotating the relay lever according to the positional relationship between the operation lever and the nozzle body,
The relay lever is provided with two or more action point portions having different distances from the fulcrum portion,
In the water stop position of the on-off valve, the action point portion that is formed closest to the fulcrum is brought into contact with the on-off valve, and at the position where the open degree of the on-off valve is greater than a predetermined degree A watering nozzle, wherein an action point is brought into contact with the on-off valve. The relay lever is provided with a first force point portion far from the fulcrum portion and a second force point portion close to the fulcrum portion,
The watering nozzle according to claim 1, wherein a distance from the fulcrum part to the second force point part / a distance from the fulcrum part to the first force point part is 0.20 to 0.80.

Images