CN213130039U - Water tank cover, water tank and tooth flushing device - Google Patents

Abstract

The utility model relates to the technical field of oral care appliances, and discloses a water tank cover, a water tank and a tooth flushing device, wherein the water tank cover comprises an upper cover and a middle cover; the upper cover is provided with a first water inlet hole, the middle cover is provided with a second water inlet hole, and the upper cover can rotate relative to the middle cover so that the first water inlet hole and the second water inlet hole are in an overlapped state or a staggered state. The application provides a pair of water tank cover, structural design is reasonable, need not take off the water tank cover, just can realize the water injection to the box in to avoided the water tank cover to be infected with the bacterium easily placing the in-process that closes with the lid, caused secondary pollution's problem to the water in the box.

Description

Water tank cover, water tank and tooth flushing device

Technical Field

The utility model relates to an oral care utensil technical field especially relates to a tank lid, water tank and towards tooth ware.

Background

The tooth flushing device is a tool for cleaning teeth and tooth gaps in a pulse water flow impact mode, and most products in the existing tooth flushing device adopt a water tank to store water. The existing water tank of the table type tooth flushing device has the problem that the structural design of a water tank cover is not reasonable enough, so that secondary pollution is easily caused in the process of adding water into the water tank. When water is added into the water tank, the water tank cover is usually opened and put aside, the water tank cover is covered after water storage, and the water tank cover is easily infected with bacteria in the process of placing and covering, so that secondary pollution is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tank lid, water tank and towards tooth ware aims at solving prior art, and the structural design of tank lid is reasonable inadequately for when adding water in the box to the water tank, need take off the tank lid and place, cause secondary pollution's problem to the water in the box easily.

In a first aspect, the utility model provides a water tank cover, which comprises an upper cover and a middle cover; the upper cover is provided with a first water inlet hole, the middle cover is provided with a second water inlet hole, and the upper cover can rotate relative to the middle cover so that the first water inlet hole and the second water inlet hole are in an overlapped state or a staggered state.

Furthermore, a connecting piece for connecting the upper cover and the middle cover is arranged between the upper cover and the middle cover so as to realize the rotatable connection of the upper cover and the middle cover.

Further, the upper cover has a cover end surface facing the middle cover, and the middle cover has an opposite end surface facing the upper cover; the first end of the connecting piece is fixed on the end face of the sealing cover, and the second end of the connecting piece is rotatably embedded into the opposite end face; or the first end of the connecting piece is fixed on the opposite end surface, and the second end of the connecting piece is rotatably embedded into the end surface of the cover.

Furthermore, when the first end of the connecting piece is fixed on the end face of the sealing cover, a connecting hole for the rotatable embedding of the second end of the connecting piece is formed in the opposite end face; when the first end of the connecting piece is fixed on the opposite end face, the end face of the sealing cover is provided with a connecting hole for the rotatable embedding of the second end of the connecting piece.

Further, the connecting piece has and is used for imbedding the embedding end in the connecting hole, the outer peripheral ring of embedding end is equipped with the sand grip, the sand grip is used for making the connecting piece joint in the connecting hole.

Furthermore, the connecting piece is an annular ring strip, and the embedded end of the annular ring strip is provided with at least one clearance groove.

Further, the water tank cover also comprises a positioning component; when the upper cover rotates relative to the middle cover, the positioning assembly is used for positioning the relative position of the upper cover and the middle cover.

Further, the positioning assembly comprises a stop and at least one blocking structure; the upper cover is provided with a cover end face facing the middle cover, and the middle cover is provided with an opposite end face facing the upper cover; the first end of the stop block is fixed on the end face of the sealing cover, the second end of the stop block is used for sliding on the opposite end face, and at least one stopping structure is arranged on the opposite end face; or the first end of the stop block is fixed on the opposite end surface, the second end of the stop block is used for sliding on the end surface of the sealing cover, and at least one blocking structure is arranged on the end surface of the sealing cover; the blocking structure is used for blocking the block, so that the first water inlet hole and the second water inlet hole are in an overlapped state or a staggered state.

Further, the positioning assembly comprises a stop block; the upper cover is provided with a cover end face facing the middle cover, and the middle cover is provided with an opposite end face facing the upper cover; the first end of the stop block is fixed on the end face of the sealing cover, and the opposite end face is provided with a sliding groove; or the first end of the stop block is fixed on the opposite end surface, and the end surface of the sealing cover is provided with a sliding groove; the second end of the stop block is slidable within the slide channel.

Further, when the first end of the stop block is fixed on the end surface of the sealing cover, a sliding groove is arranged on the opposite end surface; when the first end of the stop block is fixed on the opposite end surface, a sliding groove is arranged on the end surface of the sealing cover; the second end of the stop block can slide in the sliding groove, and the middle part and/or two ends of the sliding groove are/is provided with the stop structures.

Further, the blocking structure comprises a positioning groove, and the inner wall of the positioning groove is provided with an arc-shaped fillet which is concave towards the inside of the positioning groove; when the stop block slides into the positioning groove, the positioning groove is used for limiting the stop block.

Compared with the prior art, the utility model discloses mainly there is following beneficial effect:

above-mentioned a tank lid that provides is through offering first inlet hole on covering respectively, is covered in offering the second inlet hole in, and the upper cover can be rotatory relatively to the middle cover simultaneously to make first inlet hole be in overlapping state or dislocation state with the second inlet hole. When the first water inlet hole and the second water inlet hole are in an overlapped state, water can be injected into the box body through the first water inlet hole and the second water inlet hole. This water tank lid structural design is reasonable, need not take off the water tank lid, just can realize to the internal water injection of box to avoided the water tank lid to be infected with the bacterium easily placing with the in-process that the lid closed, caused secondary pollution's problem to the water in the box.

In a second aspect, the present invention provides a water tank, comprising a tank body and any one of the above water tank covers, wherein the water tank cover is used for covering the tank body.

Further, the upper cover has the open slot, well lid is located in the open slot, the box has and is used for the embedding annular tip in the open slot, annular tip have with the outer terminal surface of the annular of the inside lateral wall butt of open slot and be located inside the box and orientation the terminal surface in the annular of the inside center direction of box, the annular lateral wall of well lid with the cooperation of terminal surface butt in the annular, have a plurality of edges on the terminal surface in the annular the axial direction of water tank extends and encircles and arranges the bar recess of terminal surface in the annular, have on the annular lateral wall of well lid a plurality of with the bar lug of bar recess adaptation.

Compared with the prior art, the above-mentioned water tank that provides, the upper cover can be rotatory relatively the well lid, when needs add water to the water tank in, need not take off the tank lid, just can realize the water injection in the box to avoided the tank lid to be infected with the bacterium easily placing with the in-process that the lid closed, caused secondary pollution's problem to the water in the box.

The third aspect of the present invention also provides a tooth rinsing device, which comprises a tooth rinsing device body and an arbitrary water tank, wherein the water tank is disposed on the tooth rinsing device body.

Compared with the prior art, the tooth flushing device is reasonable in structural design, and the water tank cover cannot easily fall off due to vibration of the tooth flushing device in the use process of the tooth flushing device by adopting the structural arrangement mode of the water tank; meanwhile, due to the structural arrangement mode of the water tank, the situation that the water tank cover and the tank body are closed too tightly to finish assembly is avoided, so that the tooth flushing device can be assembled quickly in the production process, and the assembly efficiency of products is improved.

Drawings

Fig. 1 is a schematic structural view of a water tank cover according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an upper cover of a water tank cover according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a middle cover of a water tank cover according to an embodiment of the present invention;

FIG. 4 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 5 is an enlarged schematic view of the structure at B in FIG. 2;

fig. 6 is a schematic structural diagram of a water tank according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a water tank according to an embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of a tooth rinsing device according to an embodiment of the present invention.

Reference numerals: 1-upper cover, 2-middle cover, 3-box, 4-tooth flushing device body, 11-first water inlet, 12-annular strip, 13-stop block, 14-open slot, 21-second water inlet, 22-connecting hole, 23-stop structure, 24-sliding slot, 25-annular side wall, 31-annular outer end face, 32-annular inner end face, 121-clearance slot, 122-convex strip, 231-positioning slot and 241-blocking wall.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The following describes the implementation of the present invention in detail with reference to specific embodiments.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a water tank cover according to the present invention, the water tank cover provided in this embodiment is used for covering a tank body of a water tank, wherein the water tank cover includes an upper cover 1 and a middle cover 2; the upper cover 1 can be covered on the middle cover 2, the upper cover 1 is provided with a first water inlet hole 11, the middle cover 2 is provided with a second water inlet hole 21, and the upper cover 1 can rotate relative to the middle cover 2 so that the first water inlet hole 11 and the second water inlet hole 21 are in an overlapped state or a staggered state. The middle cover 2 can be used for covering the box body of the water tank, so that the upper cover 1 can be rotatably covered above the box body; in the process that the upper cover 1 rotates relative to the middle cover 2, when the upper cover 1 rotates to the first water inlet hole 11 and the second water inlet hole 21 to be in an overlapped state, water can be injected into the box body through the first water inlet hole 11 and the second water inlet hole 21.

Wherein, the overlapping state of the first water inlet hole 11 and the second water inlet hole 21 includes the partially overlapping state of the first water inlet hole 11 and the second water inlet hole 21 and the fully overlapping state of the first water inlet hole 11 and the second water inlet hole 21. The first water inlet hole 11 and the second water inlet hole 21 are in a staggered state, which means that the first water inlet hole 11 and the second water inlet hole 21 do not have an overlapping portion, and the two water inlet holes are completely staggered.

Above-mentioned a water tank lid that provides, upper cover 1 is used for the lid to establish on well lid 2 to offer first inlet hole 11 on upper cover 1 respectively, first inlet hole 11 can deviate the center pin setting of upper cover 1, offers second inlet hole 21 on well lid 2, and second inlet hole 21 can deviate the center pin setting of well lid 2, and upper cover 1 is connected with well lid 2 rotatable formula simultaneously, rotatory upper cover 1, and first inlet hole 11 can overlap or the dislocation with second inlet hole 21. Cover the closing cap on the box of water tank with this water tank, wherein well lid 2 and the detachable fixed connection of box, the second is gone into water hole 21 and the inside intercommunication of box, when upper cover 1 rotatory to first water hole 11 and the second is gone into water hole 21 part or whole when overlapping, the first water hole 11 of accessible and the water injection of second water hole 21 in to the box. This water tank lid structural design is reasonable, need not take off the water tank lid, just can realize to the internal water injection of box to avoided the water tank lid to be infected with the bacterium easily placing with the in-process that the lid closed, caused secondary pollution's problem to the water in the box.

Preferably, the first water inlet hole 11 and the second water inlet hole 21 are the same size. Further, when the upper cover 1 is rotated until the first water inlet hole 11 overlaps the second water inlet hole 21 and the area of the overlapping portion is the largest, the central axis of the first water inlet hole 11 coincides with the central axis of the second water inlet hole 21. The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention.

Referring to fig. 1 and 2, a connecting member for connecting the upper cover 1 and the middle cover 2 is disposed between the upper cover 1 and the middle cover 2, so as to rotatably connect the upper cover 1 and the middle cover 2.

As an embodiment of the present invention, the upper cover 1 has a cover end surface facing the middle cover 2, and the middle cover 2 has an opposite end surface facing the upper cover 1; the first end of the connecting piece is fixed on the end face of the cover, and the second end of the connecting piece is rotatably embedded on the opposite end face. Preferably, the opposite end surface is provided with a connecting hole 22 into which the second end of the connecting member is rotatably inserted.

As another embodiment of the present invention, the upper cover 1 has a cover end surface facing the middle cover 2, and the middle cover 2 has an opposite end surface facing the upper cover 1; the first end of the connecting piece is fixed on the opposite end surface, and the second end of the connecting piece is rotatably embedded on the end surface of the cover. Preferably, the end face of the cover is provided with a connecting hole 22 for rotatably embedding the second end of the connecting piece.

Wherein, the first end of the connecting piece can be fixedly connected with the upper cover 1, and the second end of the connecting piece can be rotatably embedded and connected with the middle cover 2 (at this time, the connecting piece and the upper cover 1 can be integrally formed or separately formed); the first end of the connecting piece can also be fixedly connected with the middle cover 2, and the second end of the connecting piece can be rotatably embedded and connected with the upper cover 1 (at this time, the connecting piece and the middle cover 2 can be integrally formed or separately formed). Both connection modes can achieve the same effect.

Referring to fig. 1-5, the connecting member has an insertion end for being inserted into the connecting hole 22, and a protruding strip 122 is disposed around an outer circumference of the insertion end, and the protruding strip 122 is used for clamping the connecting member in the connecting hole 22. The protruding strip 122 extends outwards along the radial direction of the connecting hole 22, and the connecting piece is clamped in the connecting hole 22 by means of the protruding strip 122. Wherein the connecting member may have elasticity. Preferably, the connector may be made of a plastic material having elasticity. Of course, the connecting member may be made of other materials, which is not limited by the present invention.

Preferably, the connecting member may be an annular coil 12, and the embedded end of the annular coil 12 is provided with at least one clearance groove 121. The clearance grooves 121 are distributed at the end of the insertion end in a slit shape, so that the insertion end of the annular coil 12 can be compressed in the process of assembling the upper cover 1 and the middle cover 2, and the annular coil 12 can be conveniently inserted into the connecting hole 22.

In the process of mounting the upper cap 1 over the middle cap 2, the middle cap 2 is pushed into the upper cap 1 from below, and in this process, the annular beads 12 are inserted and snapped into the attachment holes 22. Wherein, be located the sand grip 122 of embedded end, have the spacing effect of buckle, in-process that annular circle strip 12 imbeds connecting hole 22 with sand grip 122 guide slip-in, the embedded end still is equipped with clearance groove 121, after annular circle strip 12 slips-in and passes connecting hole 22, annular circle strip 12 can elasticity reset, from not influencing the entering of well lid 2, sand grip 122 crosses behind connecting hole 22, just make upper cover 1 and well lid 2 joint together, make both can not drop naturally. After the annular ring 12 is clamped with the connecting hole 22, the upper cover 1 and the middle cover 2 cannot naturally fall off in the vertical direction, but under the action of external force, the embedded end is provided with the clearance groove 121 to extrude the annular convex strip 122 and the annular ring 12, so that the annular ring 12 can be pulled out from the connecting hole 22, and the upper cover 1 and the middle cover 2 are separated; in the horizontal direction, the upper cover 1 can be driven to rotate on the middle cover 2 using an external force, so that the annular coil 12 can be attached to the inner wall of the connection hole 22 and rotate around the central axis of the connection hole 22 due to the protruding strip 122.

Preferably, the end face of the protruding strip 122 contacting with the inner wall of the connecting hole 22 is provided with a guiding bevel, so that the annular ring 12 can be conveniently inserted into the connecting hole 22, and the annular ring 12 can be conveniently pulled out from the connecting hole 22.

The connection hole 22 may be provided in the upper cover 1 or the middle cover 2. When the connecting hole 22 is arranged on the cover end face of the upper cover 1, the annular ring 12 is fixedly arranged on the opposite end face of the middle cover 2; when the connection holes 22 are provided on the opposite end surfaces of the middle cap 2, the annular beads 12 are fixedly provided on the cap end surface of the upper cap 1.

In one embodiment of the present invention, the center axis of the annular coil 12, the center axis of the connecting hole 22, the center axis of the upper cover 1, and the center axis of the middle cover 2 all coincide with each other in the axial direction of the tank cover. This enables the upper cover 1 to have higher stability during rotation. Of course, the central axis of the upper cover 1 may not coincide with the central axis of the middle cover 2, which is only a preferred embodiment of the present invention, and is not intended to limit the present invention.

It should be noted that the water tank cover also comprises a positioning component; when the upper cover 1 rotates relative to the middle cover 2, the positioning assembly is used for positioning the relative position of the upper cover 1 and the middle cover 2, so that the first water inlet hole 11 and the second water inlet hole 21 are positioned in an overlapping state or a dislocation state. When the first water inlet hole 11 and the second water inlet hole 21 are partially overlapped or completely overlapped, the first water inlet hole 11 and the second water inlet hole 21 are in an overlapped state; when the first water inlet hole 11 and the second water inlet hole 21 are completely staggered, the first water inlet hole 11 and the second water inlet hole 21 are in a staggered state. This locating component can be convenient for the user at the in-process of rotatory upper cover 1, when finding first inlet hole 11 and second inlet hole 21 and overlapping or misplacing, the relative position that upper cover 1 and well lid 2 were located, convenience of customers uses.

As an embodiment of the present invention, the positioning assembly comprises a stopper 13 and at least one blocking structure 23; the upper cover 1 has a cover end face facing the middle cover 2, and the middle cover 2 has an opposite end face facing the upper cover 1; a first end of the stopper 13 is fixed on the end face of the cover, a second end of the stopper 13 is used for sliding on the opposite end face, and at least one stopping structure 23 is arranged on the opposite end face; the blocking structure 23 is used for blocking the stopper 13, and when the stopper 13 is blocked by the blocking structure 23 in the process that the upper cover 1 rotates relative to the middle cover 2, the first water inlet hole and the second water inlet hole are in an overlapping state or a dislocation state.

In the process of rotating the upper cover 1, when the stopper 13 slides to the position where the stopper 23 is located, the stopper 13 can be provided with resistance by the stopper 23, so as to prevent the upper cover 1 from rotating, at this time, a user can obviously feel the resistance received by the rotation of the upper cover 1, and at this time, the first water inlet hole 11 and the second water inlet hole 12 are just in an overlapped state or a misplaced state. Therefore, when the first water inlet hole 11 and the second water inlet hole 21 are overlapped or dislocated, the relative position of the upper cover 1 and the middle cover 2 can be quickly found, and the use is convenient for users.

Specifically, a first end of the stop 13 is fixed on an end face of the cover, a sliding groove 24 is arranged on the opposite end face, and the stop structure 23 is arranged in the sliding groove 24; the second end of the stopper 13 slides in the slide groove 24 during the rotation of the upper cover 1 with respect to the middle cover 2.

The sliding groove 24 is arranged on the same end face as the blocking structure 23, and the sliding groove 24 can guide the sliding of the stopper 13, so that the stopper 13 can meet the blocking structure 23 in the sliding groove 24 in the rotating process of the upper cover 1, the sliding dislocation of the stopper 13 is prevented, and the overlapping of the first water inlet hole 11 and the second water inlet hole 21 is controlled conveniently.

Of course, one end of the stopper 13 may be fixed on the upper cover 1, and correspondingly, the stopper structure 23 is disposed on the middle cover 2; one end of the stopper 13 may be fixed to the middle cap 2, and correspondingly, the stopper structure 23 is provided on the upper cap 1. The same effect can be achieved by the two setting modes.

As another embodiment of the present invention, the positioning assembly comprises a stopper 13 and at least one blocking structure 23; the upper cover 1 has a cover end face facing the middle cover 2, and the middle cover 2 has an opposite end face facing the upper cover 1; a first end of the stop block 13 is fixed on the opposite end surface, a second end of the stop block 13 is used for sliding on the end surface of the sealing cover, and at least one stop structure 23 is arranged on the end surface of the sealing cover; the blocking structure 23 is used for blocking the stopper 13, and when the stopper 13 is blocked by the blocking structure 23 during the rotation of the upper cover 1 relative to the middle cover 2, the first water inlet hole 11 and the second water inlet hole 21 are in an overlapping state or a dislocation state.

Specifically, a first end of the stop 13 is fixed on the opposite end surface, a sliding groove 24 is arranged on the end surface of the sealing cover, and the stop structure 23 is arranged in the sliding groove 24; the second end of the stopper 13 slides in the slide groove 24 during the rotation of the upper cover 1 with respect to the middle cover 2.

As an embodiment of the present invention, the positioning assembly includes a stopper 13; the upper cover 1 has a cover end face facing the middle cover 2, and the middle cover 2 has an opposite end face facing the upper cover 1; the first end of the stop block 13 is fixed on the end surface of the sealing cover, and the opposite end surface is provided with a sliding groove 24; or the first end of the stop block 13 is fixed on the opposite end surface, and the end surface of the sealing cover is provided with a sliding groove 24; the second end of the stopper 13 slides in the slide groove 24 during the rotation of the upper cover 1 with respect to the middle cover 2.

When the first end of the stop block 13 is fixed on the end surface of the cover, the opposite end surface is provided with a sliding groove 24; when the first end of the stop block 13 is fixed on the opposite end surface, the end surface of the sealing cover is provided with a sliding groove 24; during the rotation of the upper cover 1 relative to the middle cover 2, the second end of the stopper 13 slides in the sliding groove 24, and the middle and/or both ends of the sliding groove 24 are/is provided with the blocking structure 23.

Referring to fig. 1, the slide groove 24 is arranged in an arc shape, and the slide groove 24 has a blocking wall 241 for blocking the stopper 13 from sliding off the slide groove 24. In the process of the rotation of the upper cover 1, the motion track of the stop block 13 on the sliding groove 24 is arc-shaped, the sliding groove 24 arranged in the arc shape is matched with the stop block 13, and the stop wall 241 also has the function of preventing the stop block 13 from sliding away from the sliding groove 24, so that the stop block 13 is prevented from being unable to meet the stop structure 23 due to sliding away from the sliding groove 24.

Among them, the blocking structure 23 may be provided in one or more. Optionally, the middle part and both ends of the sliding groove 24 are respectively provided with a blocking structure 23. Three blocking structures 23 are sequentially arranged on the sliding track of the stop block 13, and when the stop block 13 slides to the position of the middle blocking structure 23, the first water inlet hole 11 is overlapped with the second water inlet hole 21; when the stopper 13 slides to the position of the blocking structures 23 at the two ends, the first water inlet hole 11 and the second water inlet hole 21 are dislocated.

Optionally, blocking structures 23 are respectively provided at both ends of the sliding slot 24. When the block 13 slides to the position of the blocking structure 23 at one end of the sliding groove 24, the first water inlet hole 11 overlaps with the second water inlet hole 21; when the stopper 13 slides to the position of the blocking structure 23 at the other end of the sliding groove 24, the first water inlet hole 11 and the second water inlet hole 21 are dislocated. In addition, the blocking structure 23 may have other arrangements, which the present invention is not limited to.

As an embodiment of the present invention, please refer to fig. 1 and fig. 4, the blocking structure 23 includes a positioning groove 231, and an inner wall of the positioning groove 231 has an arc-shaped fillet depressed toward the inside of the positioning groove 231; the positioning groove 231 serves to limit the stopper 13 when the stopper 13 slides into the positioning groove 231 during the rotation of the upper cover 1 with respect to the middle cover 2.

Preferably, the stopper 13 may have elasticity, and the positioning groove 231 is used for the stopper 13 to be inserted; when the stopper 13 slides above the positioning groove 231 during the rotation of the upper cover 1, the stopper 13 automatically pops into the positioning groove 231. Wherein, the stopper 13 between the upper cover 1 and the middle cover 2 is in a compressed state, and when the stopper 13 slides to the upper side of the positioning groove 231, the stopper 13 can automatically spring into the positioning groove 231. At this time, the external force is increased to rotate the upper cover 1, and the inside of the positioning groove 231 is provided with the arc-shaped round angle with the downward recess, so that the stopper 13 can slide out from the positioning groove 231.

Preferably, a first end of the stopper 13 is provided with an elastic member for making the stopper 13 elastic, and a second end surface of the stopper 13 is formed in a circular arc shape. Wherein, the elastic member may be a spring but is not limited to a spring.

Of course, the stopper 13 may not have elasticity, and the present invention does not limit this.

The utility model provides a water tank, fig. 6 shows the utility model provides a pair of the structure schematic diagram of water tank simultaneously refers to fig. 7, and the water tank that this embodiment provided, including opening box 3 up and above-mentioned arbitrary tank lid, the tank lid is used for closing cap box 3, and the detachable fixed closing cap of well lid 2 is on box 3.

Above-mentioned a water tank that provides, 2 rotations of upper cover 1 can be built relatively, when needs are added water to the water tank, need not take off the tank lid, just can realize the water injection in to box 3 to avoided the tank lid to be infected with the bacterium easily placing with the in-process that the lid closed, caused secondary pollution's problem to the water in the box 3.

Specifically, the upper cover 1 has an open slot 14 with a downward opening, the middle cover 2 is located in the open slot 14, the box 3 has an annular end portion for being embedded in the open slot 14, the annular end portion has an annular outer end surface 31 abutting against an inner side wall of the open slot 14 and an annular inner end surface 32 located inside the box 3 and facing towards the inner center direction of the box 3, the annular side wall 25 of the middle cover 2 is in abutting fit with the annular inner end surface 32, the annular inner end surface 32 is provided with a plurality of strip-shaped grooves extending along the axial direction of the water tank and surrounding the surface of the annular inner end surface 32, and the annular side wall 25 of the middle cover 2 is provided with a plurality of strip-shaped protrusions adapted to the strip-shaped grooves. After the annular end part of the box body 3 is embedded into the open slot 14, the plurality of strip-shaped grooves are matched with the plurality of strip-shaped convex blocks in an embedded mode, so that the middle cover 2 can be detachably fixed on the box body 3, and meanwhile, the upper cover 1 can rotate above the box body 3.

The utility model also provides a towards tooth ware, figure 8 shows the utility model provides a pair of towards tooth ware's section structure schematic diagram, refer to figure 8, the towards tooth ware that this embodiment provided, including towards tooth ware body 4 and above-mentioned arbitrary water tank, the water tank setting can be fixed specifically and set up on towards tooth ware body 4 or detachable setting is on towards tooth ware body 4.

The tooth flushing device is reasonable in structural design, and the water tank cover cannot easily fall off due to vibration of the tooth flushing device in the use process of the tooth flushing device by adopting the structural arrangement mode of the water tank; meanwhile, due to the structural arrangement mode of the water tank, the situation that the water tank cover and the tank body 3 are covered tightly to be difficult to assemble is avoided, so that the tooth flushing device can be assembled quickly in the production process, and the assembly efficiency of products is improved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (14)

1. A water tank cover is characterized by comprising an upper cover and a middle cover; the upper cover is provided with a first water inlet hole, the middle cover is provided with a second water inlet hole, and the upper cover can rotate relative to the middle cover so that the first water inlet hole and the second water inlet hole are in an overlapped state or a staggered state.

2. The water tank cover according to claim 1, wherein a connecting piece for connecting the upper cover and the middle cover is arranged between the upper cover and the middle cover so as to realize rotatable connection of the upper cover and the middle cover.

3. The tank lid according to claim 2, wherein the upper lid has a lid end face facing the middle lid, the middle lid having an opposite end face facing the upper lid; the first end of the connecting piece is fixed on the end face of the sealing cover, and the second end of the connecting piece is rotatably embedded into the opposite end face; or the first end of the connecting piece is fixed on the opposite end surface, and the second end of the connecting piece is rotatably embedded into the end surface of the cover.

4. The water tank cover according to claim 3, wherein when the first end of the connecting member is fixed on the end surface of the cover, the opposite end surface is provided with a connecting hole for rotatably embedding the second end of the connecting member; when the first end of the connecting piece is fixed on the opposite end face, the end face of the sealing cover is provided with a connecting hole for the rotatable embedding of the second end of the connecting piece.

5. The tank cover according to claim 4, wherein the connecting member has an insertion end for being inserted into the connecting hole, and the outer circumference of the insertion end is provided with a protruding strip for allowing the connecting member to be engaged with the connecting hole.

6. The tank lid according to claim 4, wherein the connecting member is an annular coil, and the embedded end of the annular coil is provided with at least one clearance groove.

7. The tank lid according to claim 1, further comprising a positioning assembly; when the upper cover rotates relative to the middle cover, the positioning assembly is used for positioning the relative position of the upper cover and the middle cover.

8. The tank lid according to claim 7, wherein the positioning assembly comprises a stop and at least one blocking structure; the upper cover is provided with a cover end face facing the middle cover, and the middle cover is provided with an opposite end face facing the upper cover; the first end of the stop block is fixed on the end face of the sealing cover, the second end of the stop block is used for sliding on the opposite end face, and at least one stopping structure is arranged on the opposite end face; or the first end of the stop block is fixed on the opposite end surface, the second end of the stop block is used for sliding on the end surface of the sealing cover, and at least one blocking structure is arranged on the end surface of the sealing cover; the blocking structure is used for blocking the block, so that the first water inlet hole and the second water inlet hole are in an overlapped state or a staggered state.

9. The tank lid according to claim 7, wherein the positioning assembly comprises a stop; the upper cover is provided with a cover end face facing the middle cover, and the middle cover is provided with an opposite end face facing the upper cover; the first end of the stop block is fixed on the end face of the sealing cover, and the opposite end face is provided with a sliding groove; or the first end of the stop block is fixed on the opposite end surface, and the end surface of the sealing cover is provided with a sliding groove; the second end of the stop block is slidable within the slide channel.

10. The tank lid according to claim 8, wherein when the first end of the stopper is fixed to the cover end surface, a slide groove is provided on the opposite end surface; when the first end of the stop block is fixed on the opposite end surface, a sliding groove is arranged on the end surface of the sealing cover; the second end of the stop block can slide in the sliding groove, and the middle part and/or two ends of the sliding groove are/is provided with the stop structures.

11. The tank lid according to claim 8 or 10, wherein the blocking structure comprises a positioning groove, and an inner wall of the positioning groove has an arc-shaped fillet recessed towards the inside of the positioning groove; when the stop block slides into the positioning groove, the positioning groove is used for limiting the stop block.

12. A cistern comprising a tank and a cistern cover as claimed in any one of claims 1 to 11 for closing the tank.

13. The water tank as claimed in claim 12, wherein the upper cover has an open slot, the middle cover is located in the open slot, the tank body has an annular end portion for being embedded in the open slot, the annular end portion has an annular outer end surface abutting against an inner side wall of the open slot and an annular inner end surface located inside the tank body and facing to a central direction inside the tank body, the annular side wall of the middle cover is in abutting fit with the annular inner end surface, the annular inner end surface has a plurality of strip-shaped grooves extending in an axial direction of the water tank and arranged around the surface of the annular inner end surface, and the annular side wall of the middle cover has a plurality of strip-shaped protrusions adapted to the strip-shaped grooves.

14. A dental irrigator comprising a dental irrigator body and a water tank according to claim 12 or 13, said water tank being provided on said dental irrigator body.

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