CN213062244U

CN213062244U - Water outlet device

Info

Publication number: CN213062244U
Application number: CN202021316006.7U
Authority: CN
Inventors: 周华强
Original assignee: Xiamen Water Nymph Sanitary Technology Co Ltd
Current assignee: Xiamen Water Nymph Sanitary Technology Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-04-27
Anticipated expiration: 2030-07-07

Abstract

The utility model discloses a water outlet device, which comprises a water inlet mechanism, a flow guide mechanism connected with the water inlet mechanism and a flow distribution mechanism arranged in the water inlet mechanism and passing through the flow guide mechanism; the water inlet mechanism comprises a water inlet channel; the flow dividing mechanism comprises a first water outlet channel; the flow guide mechanism comprises a second water outlet channel and a third water outlet channel; and when the diversion mechanism and the diversion mechanism rotate relative to the water inlet mechanism, the communication relation between the water inlet channel and the first water outlet channel, the communication relation between the water inlet channel and the second water outlet channel and between the water inlet channel and the third water outlet channel are switched. The utility model discloses can realize the switching of three kinds of function water in finite space, richen tap's play water function, the volume reaches the minimum simultaneously.

Description

Water outlet device

Technical Field

The utility model relates to a bathroom field especially indicates a water outlet device.

Background

At present, in order to change the water outlet mode of a faucet, a water outlet device is usually added below the faucet and used for controlling or adjusting the water outlet quantity and the water outlet state of the faucet.

The applicant has announced the following patents for keeping the outer diameter of the water outlet device consistent with that of the faucet:

a water outlet control device (No. CN104874506B) discloses a water diversion body and a water guide body, wherein the water diversion body comprises a through diversion hole; the water guide body comprises a first water inlet, a second water inlet, a first water outlet channel and a second water outlet channel, the upper space of the first water inlet is communicated with the upper space of the second water inlet, the first water inlet is communicated with the first water outlet channel and the second water outlet channel, the second water inlet is communicated with the first water outlet channel, and the water outlet of the first water outlet channel is arranged around the water outlet of the second water outlet channel; the water distributing body is rotatably connected with the water guide body, the flow guide holes are respectively communicated with the first water inlet or the second water inlet along with the relative rotation of the water distributing body and the water guide body, and an upper space is formed between the water outlet end of each flow guide hole and the first water inlet and between the water outlet end of each flow guide hole and the second water inlet.

In the above patent, the plane rotation between the water dividing body and the water guiding body switches the water guiding hole between the first water inlet and the second water inlet, and the first water outlet channel and the second water outlet channel of the water guiding body can respectively form one kind of functional water, so the water outlet control device in the above patent can realize the switching of two kinds of functional water.

Although the water outlet control device formed by the patent is small in size, the water outlet control device can only realize water outlet of two kinds of functional water, and cannot meet more requirements of users.

At present, devices which can realize water outlet with various functions, such as showers, are available in the market. The existing shower head is generally provided with more than three different water outlet modes, but the existing shower head switches a plurality of water channels in a mode of a plane rotating part. In the actual research and development process, if the volume of the shower head is reduced and the shower head is applied to the water faucet, the minimum outer diameter can only reach 40mm, and the shower head cannot be matched with the size of the water faucet. Therefore, the switching of water with multiple functions in a limited space is extremely challenging.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a water outlet device, solves among the prior art water outlet device and goes out the defect that the water function is few.

In order to solve the technical problem, the utility model discloses a technical scheme be:

a water outlet device comprises a water inlet mechanism, a flow dividing mechanism and a flow guide mechanism which is rotatably connected with the water inlet mechanism;

the flow dividing mechanism is arranged in the water inlet mechanism and penetrates through the axis of the flow guide mechanism;

the water inlet mechanism comprises a water inlet channel;

the flow dividing mechanism comprises a first water outlet channel;

the flow guide mechanism comprises a second water outlet channel and a third water outlet channel;

when the diversion mechanism and the diversion mechanism move relative to the water inlet mechanism, the water inlet channel is communicated with the first water outlet channel, the second water outlet channel or the third water outlet channel.

Furthermore, a blocking table for blocking the second water outlet channel is arranged at the top of the flow dividing mechanism;

and a boss with a trapezoidal section is arranged on the blocking platform.

Further, a stepped groove is formed in the top of the water inlet channel;

the stepped groove is arranged on two sides of the flow distribution mechanism in the rotating direction and is smooth inclined planes.

Further, the flow guide mechanism is provided with a mounting hole;

and the side wall of the mounting hole is provided with a through groove connected with the shunt mechanism.

Furthermore, a protrusion is arranged outside one end, located in the diversion mechanism, of the outer side of the diversion mechanism, and penetrates through the through groove.

Furthermore, the water-saving device also comprises a filtering component, wherein the filtering component is arranged at the bottom of the flow guide mechanism.

Further, the shunting mechanism comprises a shunting body and a resetting piece;

the reset piece is arranged between the flow dividing body and the filtering component.

Further, the shell and the flow guide mechanism are detachably connected through a buckle assembly.

Furthermore, the buckle component comprises a male buckle and a female buckle matched with the male buckle;

the male buckle is arranged on the outer wall of the flow guide mechanism;

the female buckle is arranged on the inner wall of the shell.

The beneficial effects of the utility model reside in that: the utility model discloses be provided with reposition of redundant personnel mechanism and water conservancy diversion mechanism, reposition of redundant personnel mechanism and water conservancy diversion mechanism switch different play water modes simultaneously for mechanism's activity in-process of intaking, set up reposition of redundant personnel mechanism simultaneously and increased first water channel in limited space, compare in prior art, have increased a function water to do not increase out the holistic volume of water installation. When the water inlet channel is only communicated with the first water outlet channel, first functional water can be formed; when the water inlet channel is only communicated with the second water outlet channel, second functional water can be formed; when the water inlet channel is only communicated with the third water outlet channel, third functional water can be formed; the three kinds of functional water are suitable for different application scenes, so that the faucet or other bathroom products can be a multifunctional water outlet device to meet daily needs of users. Compared with the prior art, the utility model discloses simple structure, occupation space is little, on the basis that does not increase occupation space, has increased the play water of a function water, realizes switching between multiple play water mode, more has use value.

Drawings

Fig. 1 is a sectional view of a water outlet device according to a third embodiment of the present invention, showing a state that water spray can flow out;

fig. 2 is a three-dimensional sectional view of a water outlet device according to a third embodiment of the present invention, showing a state of spraying water that can flow out;

fig. 3 is a sectional view of a water outlet device according to a third embodiment of the present invention, in a state of being capable of flowing shower water;

fig. 4 is a three-dimensional cross-sectional view of the water outlet device of the third embodiment of the present invention in a state of being capable of flowing shower water;

fig. 5 is a sectional view of a water outlet device according to a third embodiment of the present invention, in a state where bubble water can flow out;

fig. 6 is a three-dimensional sectional view of a water outlet device according to a third embodiment of the present invention, in a state where bubble water can flow out;

fig. 7 is an exploded view of a diversion mechanism and a diversion mechanism in the third embodiment of the present invention;

fig. 8 is an exploded view of a buckle assembly according to a second embodiment of the present invention;

fig. 9 is an exploded view of a water outlet device according to a second embodiment of the present invention;

fig. 10 is a schematic structural view of a water outlet body in the second embodiment of the present invention;

fig. 11 is a bottom view of the upper water inlet ring in the third embodiment of the present invention;

fig. 12 is a schematic structural view of a water outlet device according to a fourth embodiment of the present invention.

Description of reference numerals:

1. a water inlet mechanism; 11. a water intake assembly; 12. discharging the water body; 111. an upper water feeding ring; 112. a lower water inlet ring; 113. a first gasket; 114. a second gasket; 115. pressing and buckling; 116. a third gasket; 121. an internal thread; 1111. a first rotating section; 1221. an accommodating cavity; 1222. a water outlet hole;

2. a flow guide mechanism; 21. mounting holes; 22. a first cavity; 23. a second cavity; 211. a second rotating part; 212. a through groove;

3. a flow dividing mechanism; 31. a protrusion; 32. a blocking table; 33. a flow divider; 34. a reset member; 35. an annular boss;

4. a housing;

5. a filter assembly; 51. a lower filter screen; 52. a first water outlet ring; 53. a second water outlet ring;

6. a pressurizing assembly; 61. a fourth gasket; 62. a filter screen is arranged; 7. a metal gasket;

8. a buckle assembly; 81. a male buckle; 82. a female buckle; 811. a limiting groove; 821. a female buckle slot; 822. an upper limit table; 823. a lower limit table;

10. a water inlet channel; 20. a first water outlet channel; 301. a second water outlet channel; 302. a third water outlet channel; 40. a transition flow channel; 50. an intake gap.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 12, a water outlet device includes a water inlet mechanism, a diversion mechanism connected to the water inlet mechanism, and a diversion mechanism installed in the water inlet mechanism and passing through the diversion mechanism;

the water inlet mechanism comprises a water inlet channel;

the flow dividing mechanism comprises a first water outlet channel;

and when the flow dividing mechanism and the flow guide mechanism move relative to the water inlet mechanism, the communication relation between the water inlet channel and the first water outlet channel, the communication relation between the water inlet channel and the second water outlet channel, and the communication relation between the water inlet channel and the third water outlet channel are switched.

The utility model discloses a theory of operation lies in:

when the flow dividing mechanism is positioned at the bottom of the movable space in the water inlet mechanism, the water inlet channel is only communicated with the first water outlet channel to form first functional water;

when the flow dividing mechanism is positioned at the top of the movable space in the water inlet mechanism, the water inlet channel is only communicated with the second water outlet channel or only communicated with the third water outlet channel to form second functional water or third functional water.

From the above description, the beneficial effects of the present invention are: the utility model discloses be provided with reposition of redundant personnel mechanism and water conservancy diversion mechanism, reposition of redundant personnel mechanism and water conservancy diversion mechanism switch different play water modes simultaneously for mechanism's activity in-process of intaking, set up reposition of redundant personnel mechanism simultaneously and increased first water channel in limited space, compare in prior art, have increased a function water to do not increase out the holistic volume of water installation. When the water inlet channel is only communicated with the first water outlet channel, first functional water can be formed; when the water inlet channel is only communicated with the second water outlet channel, second functional water can be formed; when the water inlet channel is only communicated with the third water outlet channel, third functional water can be formed; the three kinds of functional water are suitable for different application scenes, so that the faucet or other bathroom products can be a multifunctional water outlet device to meet daily needs of users. Compared with the prior art, the utility model discloses simple structure, occupation space is little, on the basis that does not increase occupation space, has increased the play water of a function water, realizes switching between multiple play water mode, more has use value.

a first rotating part is arranged on one side, facing the flow dividing mechanism, of the top of the water inlet channel;

the blocking table is provided with a second rotating part matched with the first rotating part.

Further, the first rotating part is a stepped groove;

the second rotating part is a boss with a trapezoidal section;

one side of the stepped groove in the rotation direction of the boss is a smooth inclined plane.

According to the above description, the boss with the trapezoidal section is arranged at the top of the flow dividing mechanism, and the stepped groove matched with the boss is formed in the top of the water inlet channel, so that the flow dividing mechanism can be accurately positioned through the boss switching position in the rotating process of the flow dividing mechanism relative to the water inlet mechanism, and the switching between different functional waters is realized.

Further, the flow guide mechanism is provided with a mounting hole;

According to the above description, the side wall of the mounting hole is provided with the through groove, the outer side of the diversion mechanism is provided with the protrusion, and the protrusion penetrates through the through groove to enable the diversion mechanism to rotate along with the rotation of the diversion mechanism, so that the diversion mechanism and the diversion mechanism rotate relative to the water inlet mechanism, and the switching of various functional water is further realized.

According to the above description, the piece that resets is installed in split stream body and filtering component within a definite time to promote the split stream body and reciprocate, when split stream body top boss was rotatory to ladder groove below, the piece that resets can promote the split stream body rebound, makes the boss embedding ladder inslot, and then blocks up first exhalant canal, makes inhalant canal and second exhalant canal or third exhalant canal intercommunication, realizes the switching of function water.

the male buckle is arranged on the outer wall of the flow guide mechanism;

the female buckle is arranged on the inner wall of the shell.

According to the above description, the diversion mechanism and the shell are connected through the buckle assembly, so that a relatively fixed position relation is formed between the diversion mechanism and the shell, the diversion mechanism can be driven to rotate through the shell, and a user can switch the water outlet state conveniently.

Example one

The water outlet device in the embodiment is suitable for various bathroom products such as faucets, extraction shower heads or bidets.

A water outlet device comprises a water inlet mechanism 1, a flow guide mechanism 2 connected with the water inlet mechanism 1 and a flow distribution mechanism 3 arranged between the water inlet mechanism 1 and the flow guide mechanism 2; the water inlet mechanism 1 comprises a water inlet channel 10; the flow dividing mechanism 3 comprises a first water outlet channel 20; the diversion mechanism 2 comprises a second water outlet channel 301 and a third water outlet channel 302; when the diversion mechanism 3 and the diversion mechanism 2 rotate relative to the water inlet mechanism 1, the communication relationship between the water inlet channel 10 and the first water outlet channel 20, the communication relationship between the water outlet channel 301 and the communication relationship between the water outlet channel 302 and the water inlet channel are switched.

Example two

The water outlet device in the embodiment is suitable for bathroom products such as an external-tooth-shaped faucet, a pumping shower head or a bidet.

The difference between the present embodiment and the first embodiment is that the specific structure of the water outlet device is defined.

Referring to fig. 2, the water inlet mechanism 1 includes a water inlet component 11 and a water outlet body 12, one end of the flow dividing mechanism 3 is movably installed in the water inlet component 11, the other end of the flow dividing mechanism is movably arranged to penetrate through the water outlet body 12, and a transition flow passage 40 for communicating the water inlet passage 10 with the second water outlet passage 301 is formed between the water inlet component 11 and the water outlet body 12; the diversion mechanism 2 is connected with the water outlet body 12 in a buckling way.

Specifically, the top of the water outlet body 12 is provided with an internal thread 121 for connecting with a faucet, the outer wall of the water outlet body 12 is further provided with an inner concave accommodating cavity 1221 for installing a gear assembly, and the bottom of the water outlet body 12 is provided with a plurality of water outlet holes 1222 for communicating the water inlet channel 10 with the second water outlet channel 301 or communicating the water inlet channel 10 with the third water outlet channel 302;

referring to fig. 2, the water inlet assembly 11 includes an upper water inlet ring 111, a lower water inlet ring 112, a first gasket 113, a second gasket 114, a press button 115, and a third gasket 116; the first gasket 113 is embedded at the top of the lower water inlet ring 112, and the upper water inlet ring 111 is embedded in the top of the lower water inlet ring 112; the press buckle 115 is horizontally inserted into the water outlet of the lower water inlet ring 112, and the second gasket 114 is embedded in the lower water inlet ring 112 and positioned below the press buckle 115; the water outlet body 12 is sleeved outside the lower water inlet ring 112; the third gasket 116 is sleeved outside the lower water inlet ring 112 and inside the water outlet body 12.

Referring to fig. 1, the water dispenser further comprises a housing 4, the housing 4 is installed outside the water outlet body 12 and the flow guide mechanism 2, an air inlet gap 50 is formed between the water outlet body 12 and the housing 4, the air inlet gap 50 is communicated with the second water outlet channel 301, a plurality of convex blocks are evenly distributed on the outer wall of the water outlet body 12 and used for ensuring smoothness of the air inlet gap 50 between the housing 4 and the water outlet body 12 and between the flow guide mechanism 2 and the water outlet body 12, the flow guide mechanism 2 is provided with a metal gasket 7 used for increasing air inlet pressure intensity between the water outlet body 12, and the metal gasket 7 is embedded in a water inlet of the flow guide mechanism 2.

Referring to fig. 4, 6 and 7, a first cavity 22 and a second cavity 23 are arranged in the diversion mechanism 2, and the first cavity 22 and the second cavity 23 are arranged adjacently.

Referring to fig. 2, further comprising a filter assembly 5 and a pressurizing assembly 6; the filter assembly 5 is clamped with the lower side of the flow guide mechanism 2 and communicated with the second water outlet channel 301. The filter assembly 5 comprises a lower filter screen 51, a first water outlet ring 52 and a second water outlet ring 53; the second water outlet ring 53 is sleeved outside the first water outlet ring 52; the lower filter screen 51 is embedded in the first water outlet ring 52, and the first water outlet ring 52 is clamped in the water outlet of the flow guide mechanism 2; the pressurizing assembly 6 comprises a fourth gasket 61 and an upper filter screen 62, and the fourth gasket 61 and the upper filter screen 62 are sequentially arranged on the top of the water inlet assembly 11.

Specifically, the first water outlet ring 52 is installed at the water outlet of the first cavity 22, the second water outlet ring 53 is installed at the water outlet of the second cavity 23, and the first water outlet ring 52 is clamped with the inner wall of the diversion mechanism 2.

Referring to fig. 8, the diversion mechanism 2 is rotatably clamped with the water outlet body 12; the diversion mechanism 2 is connected with the housing 4 through the buckle assembly 8, the buckle assembly 8 comprises a male buckle 81 and a female buckle 82, namely, the male buckle 81 on the outer side surface of the diversion mechanism 2 is clamped into the female buckle 82 on the inner wall of the housing 4, specifically, the female buckle 82 comprises a female buckle groove 821, an upper limit platform 822 and a lower limit platform 823, the female buckle 82 is arranged on the side wall of the upper limit platform 822, a limit groove 811 matched with the lower limit platform 823 is arranged on the male buckle 81 on the outer side of the diversion mechanism 2, the male buckle 81 is inserted into the female buckle 82 and continuously moves downwards until the lower limit platform 823 is embedded into the limit groove 811, the upper end of the male buckle 81 is limited in the female buckle groove 821, and the diversion mechanism 2 can rotate along with the rotation of the housing 4.

EXAMPLE III

The difference between the present embodiment and the second embodiment is that the specific structures of the diversion mechanism 2 and the diversion mechanism 3 are defined.

Referring to fig. 1 to 11, the flow dividing mechanism 3 includes a flow dividing body 33 and a restoring member 34, and the restoring member 34 is a pressure spring; the outer side of the flow dividing body 33 is provided with two bulges 31, the upper end of a reset piece 34 at the top of the flow dividing body 33 is pressed against the lower sides of the two bulges 31, and the lower end of the reset piece 34 is sleeved on the outer side of the flow dividing body 33 and pressed against the flow guide mechanism 2 and used for pushing the flow dividing body 33 to reset; a blocking table 32 is arranged at the top of the flow dividing body 33, and an annular boss 35 is further arranged on the blocking table 32 and used for enabling a water inlet space to be reserved between the blocking table 32 and the top of the water inlet channel 10, so that switching between different water outlet states is smoother;

the top of the flow dividing mechanism 3 is provided with a blocking platform 32 for blocking the second water outlet channel 301; a first rotating part 1111 is arranged at one side of the top of the water inlet channel 10 facing the flow dividing mechanism 3; the blocking table 32 is provided with a second rotating portion 211 for cooperating with the first rotating portion 1111.

In this embodiment, preferably, the first rotation portion 1111 is a stepped groove; the second rotating part 211 is a boss with a trapezoidal section; one side of the stepped groove in the rotating direction of the boss is a smooth inclined plane. In other equivalent embodiments, the stepped groove may have two smoothly connected stepped surfaces sequentially arranged from top to bottom along the rotation direction, so that the water inlet channel 10 can be simultaneously communicated with the first water outlet channel 20 and the third water outlet channel 302 when the blocking table 32 is located at the middle of the water inlet channel 10;

there are two second rotation portions 211 that set up relatively on the block platform 32, the section of second rotation portion 211 is isosceles trapezoid, go up water ring 111 towards the one side of branch fluid 33 set up two relative settings and with the first rotation portion 1111 of second rotation portion 211 assorted, first rotation portion 1111 is the inclined plane along an ascending lateral wall of direction of rotation to make second rotation portion 211 can be rotatory along first rotation portion 1111 in the direction of rotation, and then drive branch fluid 33 and reciprocate. The bottom of the flow divider 33 is provided with a triangular prism-shaped groove, and the water outlet of the flow divider 33 is oval in a top view angle, so that water flowing out of the flow divider 33 forms blade water, the impact force is stronger, and the water-saving type water-saving device can be used for flushing gaps.

Referring to fig. 7, two through grooves 212 matched with the protrusions 31 are formed in the annular side wall of the mounting hole 21 of the diversion mechanism 2, and the protrusions 31 penetrate through the through grooves 212, so that the diversion mechanism 2 rotates to drive the diversion body 33 to rotate through the protrusions 31, and switching of the water outlet channel is achieved.

The specific implementation process of the embodiment is as follows:

referring to fig. 1, when the top of the second rotating portion 211 is located outside the first rotating portion 1111 and abuts against the lower side of the upper water inlet ring 111, the bottom of the blocking platform 32 abuts against the water outlet of the water inlet assembly 11, the transition flow channel 40 is closed, the water inlet channel 10 is communicated with the first water outlet channel 20, and water flows out from the water outlet of the flow splitting body 33 to form blade water;

referring to fig. 3, the housing 4 is rotated to drive the diversion mechanism 2 and the diversion body 33 to rotate, so that the protrusion 31 is embedded into the first rotating portion 1111, at this time, the top of the diversion body 33 is pressed against the lower side of the upper water inlet ring 111, the first water outlet channel 20 is closed, and the water inlet channel 10 is simultaneously communicated with the transition flow channel 40 and the third water outlet channel 302 to form the shower head;

referring to fig. 5, the housing 4 is rotated to drive the diversion mechanism 2 and the diversion body 33 to rotate, the protrusion 31 is always located in the first rotation portion 1111, at this time, the top of the diversion body 33 pushes against the lower side of the upper water inlet ring 111, the first water outlet channel 20 is closed, the water inlet channel 10 is sequentially communicated with the transition flow channel 40 and the second water outlet channel 301, and in the process that water flows into the second water outlet channel 301 from the transition flow channel 40, air is sucked from the air inlet gap 50 to form bubble water.

Example four

Replace internal thread 121 for the external screw thread in this embodiment, be applicable to the tap and the extraction gondola water faucet of interior tooth type.

To sum up, the utility model provides a pair of water outlet device sets up the section for trapezoidal boss and with boss assorted ladder groove, through the synchronous revolution of reposition of redundant personnel, guiding mechanism and casing, makes the intercommunication relation between inlet channel and different outlet channel switch, realizes the smooth switching between three kinds of different function water. The water pressure of the blade water is larger than that of bubble water and shower water, and the water-saving shower head is suitable for flushing objects with stubborn stains attached to the surface.

The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.

Claims

1. A water outlet device is characterized by comprising a water inlet mechanism, a flow dividing mechanism and a flow guide mechanism which is rotatably connected with the water inlet mechanism;

the water inlet mechanism comprises a water inlet channel;

the flow dividing mechanism comprises a first water outlet channel;

2. The water outlet device according to claim 1, wherein a blocking platform for blocking the second water outlet channel is arranged at the top of the flow dividing mechanism;

3. The water outlet device of claim 2, wherein the first rotating part is a stepped groove;

the second rotating part is a boss with a trapezoidal section;

4. The water discharge device according to claim 1, wherein the water inlet mechanism includes a water outlet hole, and during the rotation of the diversion mechanism relative to the flow diversion mechanism, the water inlet channel communicates with the second water outlet channel or the third water outlet channel through the water outlet hole.

5. The water outlet device as claimed in claim 1, wherein the diversion mechanism is provided with a mounting hole;

6. The water outlet device as claimed in claim 5, wherein a protrusion is provided at an end of the outer side of the diversion mechanism inside the diversion mechanism, and the protrusion is disposed through the through groove.

7. The water outlet device of claim 1, further comprising a filter assembly, wherein the filter assembly is mounted at the bottom of the diversion mechanism.

8. The water outlet device as claimed in claim 7, wherein the diversion mechanism comprises a diversion body and a reset member;

9. The water outlet device of claim 1, further comprising a housing, wherein the housing is detachably connected to the diversion mechanism via a snap assembly.

10. The water outlet device as claimed in claim 9, wherein the snap-fit assembly comprises a male buckle and a female buckle matched with the male buckle;

the male buckle is arranged on the outer wall of the flow guide mechanism;

the female buckle is arranged on the inner wall of the shell.