JPH0251674A - Water channel switching device - Google Patents

Abstract

PURPOSE:To discharge water of other channel by utilizing negative pressure produced in a selected water channel to eliminate a leakage of water to the other water channel by providing suction water channels for sucking water from the other water channel adjacent to each water channel in a water channel - switching device for selectively opening plural water channels. CONSTITUTION:A flow dividing plate 3 forming a direct water discharging port 18, a shower discharging port 19, and openings 31, 32 connected to these ports are arranged in a body-housing 1 of a shower head having a hose connection port 11. A switching plate 4 having a communicating port 41 is positioned on the opposite side from the flow dividing plate 3. A suction water channel 15 connected to the waterchannel on the shower-discharging port 19 side is formed on the outer periphery of the direct water discharging port 18. Thus, when water is discharged from the direct water discharging port 18, the suction water channel 15 becomes negative pressure, so that the water stayed on the shower discharging port 19 side is sucked in and discharged from the suction water channel 15. When water is discharged from the shower discharging port 19, the water stayed in the direct water discharging port 18 is discharged by flowing water of the suction water channel 15.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a channel switching device used for switching between stationary water and shower water.

[Conventional technology]

As a waterway switching device of this type,
In addition to what is shown in the publication, various other methods have been proposed. This is especially true in the case of a channel that can be switched with a single touch. Some devices include a flow divider plate having a plurality of types of openings connected to water channels, and a switching plate that selectively opens the plurality of types of openings of the flow divider plate.

[Problem to be solved by the invention]

In this case, if the sliding contact surface between the flow divider plate and the switching plate is to be sealed securely, the switching operation becomes difficult due to the water pressure, and there are problems in terms of operability, such as the switching operation being impossible under flowing water. will be invited. Furthermore, if the sealing performance is compromised in favor of operability, water leakage into the other waterway when water is flowing through one waterway becomes a problem. The present invention has been made in view of these points, and its purpose is to provide a water channel switching device that can eliminate the conflicting problems of operability associated with sealing performance and water leakage. .

[Means to solve the problem]

Accordingly, the present invention provides a channel switching device including a flow dividing plate having a plurality of types of openings connected to different water channels, and a switching plate that selectively opens the plurality of types of openings of the flow dividing plate. The waterway is characterized by a suction waterway that sucks water from other waterways. [Function] According to the present invention, even if water leaks into another waterway when a certain waterway is selected, the leaked water is sucked into the selected waterway through the suction waterway. To,
It is possible to substantially eliminate water leakage to other waterways, and therefore there is no need to provide sealing properties that would sacrifice operability. [Example] The present invention will be described in detail below based on an example in which the present invention is incorporated into the illustrated shower head. As shown in FIGS. 1 and 4, the main body housing 1 of this shower head has a head cover 17 attached to the upper front surface, a push button 2 provided on the upper end surface, and a connection port 11 with a hose 91 at the lower end. The head cover 17 has a direct water outlet 18 with a rectifying wire mesh arranged in its center, a shower water outlet 19 consisting of a large number of small holes around the periphery, and further surrounds the direct water outlet 18. A water outlet 16 consisting of a plurality of small holes is provided at the position. 9 in FIG. 4 is a holder. FIG. 6 shows the state in which it is installed on a washstand. The above-mentioned water outlet 16, like the shower water outlet 19, is one through which water flows during shower water, but as shown in FIGS. It is provided as a suction channel 15, and as shown in FIGS. 5 and 6, a groove 16a connected to the rear end of the shower water outlet 19 is provided on the rear end side. A flow dividing plate 3 is clamped and fixed between the main body housing 1 and the head cover 17. As shown in FIG. 3, this flow dividing plate 3 has an opening 31 continuous to the center side of the front surface and an opening 32 continuous to the peripheral side of the front surface.
A plurality of cams, three in the illustrated example, are formed alternately at equal pitches, and a shaft hole 33 is provided at the center of the back side, and a plurality of cams 34 are protruded to surround the shaft hole 33. 71, 72, and 73 in the figure 0 are the main body housing 1
between the main body housing 1 and the head cover 1
7. This is an O-ring for waterproofing between the joints and between the flow divider plate 3 and the head cover 17. One end is supported by the shaft hole 33 of the flow dividing plate 3, and the other end is a shaft hole 15 of the partition plate 13 provided in the main body housing 1.
The switching plate 4 and the feed plate 5 are both freely rotatably and slidably mounted on the shaft 6 supported by the shaft 6.The switching plate 4 is located on the back side of the flow dividing plate 3.
has a plurality of communicating ports 41, in the illustrated example, three communicating ports 41 corresponding to the number of openings 31, 32 of the flow dividing plate 3, at equal pitches, and a plurality of communication ports 41 are provided on the surface on the side of the flow dividing plate 3. A cam 44 is arranged in an annular shape, and a plurality of engaging pawls 42 are also arranged in an annular shape on the other side. The feed plate 5 located on the back side of the switching plate 4 has the above-mentioned engaging claw 4 of the switching plate 4 on the surface on the switching plate 4 side.
It has a plurality of feed pawls 52 that together constitute a ratchet mechanism, and is urged toward the switching plate 4 by a spring 60 disposed between it and the partition plate 13. A bin 51 is provided protruding from the back surface of the feed plate 5. The push button 2 is removably attached to one end of a sliding shaft 20 that is attached to the main body housing 1 so as to be slidable in the axial direction. This sliding shaft 20 is waterproofed at the penetrating portion of the main body housing 1 by a seal packing 21, and at the same time is biased in one direction by a return spring 22. The main body housing 1 is guided for directional movement.
A cam plate 23 located inside and surrounded by the partition plate 13 is fixed. As shown in FIG. It is inserted into the long hole 24 through the arc-shaped long hole 14 . In this shower head, when the push button 2 is pushed in, the cam plate 23 moves downward together with the sliding shaft 20.
However, the feed plate 5, which engages the bottle 51 in the elongated hole 24, is rotated in one direction. This rotation of the feed plate 5 is transmitted to the switching plate 4 via the mesh mechanism, and the switching plate 4 also rotates in the same direction by one pitch to switch the openings 31 and 32 with which the communication port 41 communicates. When the communication port 41 matches the rfR port 31, water is discharged from the water port 18, and the communication port 41 is connected to the opening 32.
When they match, water is discharged from the shower water discharge port 19. When the switching plate 4 is rotated, the flow dividing plate 3
Due to the engagement of the cam 34 provided on the switching plate 4 with the cam 44 of the switching plate 4, the switching plate 4 is lifted from the flow dividing plate 3, and the rubber bead 45 attached to the surface of the switching plate 4 on the flow dividing plate 3 side moves into the flow dividing plate. While separated from 3,
The rotation for one pitch is performed. That is, the cams 34, 44 here constitute a ratchet mechanism that engages only in one direction, similar to the one composed of the engaging claw 42 and the feeding claw 52, but the engaging claw 42 and the feeding claw 52 constitute a ratchet mechanism that engages only in one direction. Since it constitutes a ratchet mechanism in the opposite direction to the ratchet mechanism using the pawl 52, when the feed plate 4 rotates the switching plate 4,
The cam 44 of the switching plate 4 and the cam 34 of the flow dividing plate 3 are
The mutual inclined surfaces come into sliding contact, and the cut plate 4 is separated from the flow divider plate 3.
When it has gone up the slope, the feed plate 5 and the switching plate 4 are moved toward the flow dividing plate 3 by the urging force of the spring 60, and the switching plate 4 comes into contact with the flow dividing plate 3 again. When the user releases his or her finger from the push button 2, the sliding shaft 20 and the push button 2 return to their original positions under the force of the return spring 22, and the feed plate 5, which engages the pin 51 with the cam plate 23, also rotates in the opposite direction. The rotation of the feed plate 5 in this direction is caused by the feed pawl 5
2 and the engagement claw 42, the feed plate and the like rotate while being lifted from the switching plate 4.
The switching plate 4 does not rotate or float away from the flow dividing plate 3 due to the engagement of its cam 44 with the cam 34 of the flow dividing plate 3. Now, by switching the waterway as described above,
As shown in FIG. 7, the shower water outlet 19 and the water outlet 1
When switching from 6 to the fixed water outlet 18, water is naturally discharged from the direct water outlet 18, but at the time of switching, the water that had accumulated between the flow divider plate 3 and the head cover 17 and the shower discharge The water leaking into the water outlet 19@ is sucked into the water outlet 16 so that the water coming out of the water outlet 18 creates a negative pressure at the tip of the water outlet 16, which is connected to the water outlet 18 through the suction channel 15. The water is discharged along with the water leaving the water outlet 18. Therefore, even if water leaks into the shower water outlet 19@, water will not drip from the shower water outlet 19. Moreover, the groove 16a connecting the rear ends of the water outlet 16 and the shower water outlet 19 is inclined at an angle α, and this angle α is set to be greater than the mounting angle θ of the shower head shown in FIG. Because the diameter of the water outlet 16 is larger than that of the shower water outlet 19, the water that has accumulated between the flow divider plate 3 and the head cover 17 is also removed from the shower water outlet 19. No, water outlet 1
6 and is discharged together with the water coming out from the water port 18. Note that here, the diameter of the shower water outlet 19 is made small so that the surface tension of the water is greater than the gravity of the water, so even if the shower head is tilted, water will not drip from the shower water outlet 19. It has become something that does not exist. Conversely, when the water channel is switched to the shower water outlet 19 side, water is discharged through the shower water outlet 19 and the water outlet 16, and at this time, the water that has accumulated inside the water outlet 18 and The water leaking to the water outlet 18 side is discharged together with the water released from the water outlet 16 through the suction channel 15. Instead of the groove 16a connecting the water outlet 16 and the rear ends of the shower water outlet 19, an annular groove 16b may be provided as shown in FIG. 8. Waterway 1
5, the suction waterway 15 may be located at any position as long as it connects the waterway on the water outlet 18 side and the waterway on the shower water outlet 19 side. Furthermore, the water outlet 16, suction channel 15, etc. are the 12th! ! 1~
As shown in FIG. 14, when discharging water from the direct water outlet 18, which may be provided only on the lower side where water dripping is a problem, the first embodiment has a star-shaped cross section. However, in this case, it appears to have a circular cross section from the direction the user views it (the downward direction in the figure).

【Effect of the invention】

As described above, in the present invention, when switching to a certain waterway, water accumulated in the other waterway side or water leaking to the other waterway side is removed by the negative pressure when water flows into the selected waterway. Since the water is sucked through the suction channel and discharged together with the water flowing through the selected channel, there is virtually no water leakage to other channels. Even if the sealing property between the switching plate and the switching plate is not perfect, that is, the sealing property is not such that the operability is deteriorated, a good waterway switching function can be exhibited.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of one embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line X-X in FIG. 1, FIG. 3 is an exploded perspective view of the same, and FIG. 4 is a perspective view of the same, and FIG. Figures 5 (a) to (d) are a rear view, sectional view, front view, and partial sectional view of the head cover same as above, Figure 6 is a perspective view of same as above, and Figure 7 is a longitudinal sectional view showing the flow of water as above. , FIGS. 8(a) and 8(b) are rear views and sectional views showing other examples of the head cover, FIGS. 9 to 11 are sectional views showing other examples of suction channels, and FIG. A perspective view of an example;
Figures 13(a), (b), and (c) are a rear view, a sectional view taken along the line A-A, and a front view of the head cover, and Figure 14 is a perspective view of the head cover, in which 3 is a flow divider plate, and 4 is a switch. plate, 15
indicates a suction waterway, and 31.32 indicates an opening. Agent Patent Attorney Ishi 1) Chief Figure 7 Figure 4 Figure 3 [60 Figure 6 Figure 8 (G) Figure 2 Figure 9 1Q Leap Figure 11 Figure 14

Claims (1)

[Claims] (1) In a waterway switching device comprising a flow divider plate having a plurality of types of openings connected to different waterways, and a switching plate that selectively opens the plurality of types of openings of the flow divider plate, each of the waterways has a plurality of types of openings. A waterway switching device characterized by being equipped with a suction waterway that sucks water from the waterway.