CN211166353U

CN211166353U - Portable champignon device of electronic air diffusion formula

Info

Publication number: CN211166353U
Application number: CN201922022177.2U
Authority: CN
Inventors: 胡杨民; 唐小兰
Original assignee: Shenzhen Dituo Electronic Co Ltd
Current assignee: Shenzhen Dituo Electronic Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-04
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a portable champignon device of electronic air diffusion formula, this champignon device include the shell, set up gas outlet and air inlet on this shell, set firmly the micro motor in this shell, set firmly in this shell and be connected and for the battery of this micro motor power supply with this micro motor electricity and set up on this micro motor output shaft along with this output shaft rotation and be used for the fixed wheeled bracket of wind of placing fragrant piece. Use the utility model discloses a during portable champignon device of electronic air diffusion formula, can be fixed in on the wheeled bracket of wind with the fragrant piece, then control micro motor rotates, micro motor rotates and drives wheeled bracket of wind through the output shaft, and be located the fragrant piece rotation on the wheeled bracket of wind, the wheeled bracket of wind rotates and inhales the shell in with the outside air by the air inlet, and blow off outside the shell by the gas outlet, thereby form the air convection and take out the essential oil molecule or the molecular group in the fragrant piece, spread in the air on every side.

Description

Portable champignon device of electronic air diffusion formula

Technical Field

The utility model relates to an champignon field, more specifically say, relate to a portable champignon device of electronic air diffusion formula.

Background

The aromatherapy diffuses the effective components of the essential oil into the ambient air, provides an essential oil environment with uniform concentration for people, and realizes the effects of pleasure, physical therapy and health care by inhaling the essential oil into the human body through a respiratory system.

The traditional aromatherapy methods include the following methods:

the essential oil is directly heated and evaporated: heating the essential oil to make molecules or molecular groups of the essential oil separate from the liquid surface (or carrier carrying the essential oil, such as solid fragrance sheet) in a steam manner and emit the essential oil into the air, thereby achieving the purpose of fragrance diffusion. Because part of the essential oil can go bad or even block at high temperature, the essential oil diffused in the air goes bad and goes bad, so the heating type aromatherapy is only limited to the diffusion of the essential oil with high temperature resistance.

Essential oil high pressure spraying formula: the essential oil is conveyed to the vicinity of the high-speed air nozzle, so that the high-speed airflow flows through the air nozzle to blow away the essential oil and disperse the essential oil into the air, thereby achieving the purpose of aromatherapy. Because the delivery quantity of the essential oil to the air nozzle is difficult to accurately control, and is particularly difficult to realize micro-control, the diffusion speed of the essential oil in the mode is far higher than the demand of an actual household and a small space. In practice, the airflow is controlled in an intermittent mode, so that the purpose of reducing the diffusion amount of the essential oil is achieved, and as a result, the diffusion concentration of the essential oil is uneven, and the aromatherapy effect is slightly poor.

Ultrasonic atomization formula: the essential oil is excited by using the ultrasonic atomization sheet, so that the essential oil is separated from the liquid surface of the essential oil in a molecule or molecular group mode, and then the essential oil molecules or molecular groups separated from the liquid surface are blown into the air by flowing air, so that the aromatherapy process is completed. Most of the essential oil is corrosive, so that on one hand, the container and the ultrasonic atomization sheet are corroded, and the service life of the aromatherapy device is shortened; on the other hand, the corrosion process causes a chemical reaction between the essential oil and the substance to be corroded, causing the essential oil diffused into the air to be "contaminated". Moreover, the atomization speed of the ultrasonic atomization mode is high, and the diffusion speed is far higher than the demand of an actual household and a small space. Based on this, water is generally used as an essential oil carrier in practice, namely: the essential oil is dripped into water, and the aqueous solution (or suspension) of the essential oil is atomized by the ultrasonic atomization device, because the concentration of the aqueous solution (or suspension) of the essential oil is lower, the corrosivity of the essential oil is greatly reduced, the atomization speed of the essential oil is reduced, and the atomization speed can be adjusted by adjusting the amount of the essential oil dripped into the water. The side effects brought by this approach are: the aroma can increase the air humidity at the same time, and is not suitable for being used in seasons and environments with high air humidity.

The flowing air is volatilized: essential oil is dropped on the sponge sheet or the porous material (such as diatomite sintered block) (or the solid fragrant sheet is directly used), then the essential oil is placed at an air flowing position, such as an air conditioner air outlet, a fan vent and the like, and the flowing air takes away essential oil molecules or molecular groups soaked in the sponge sheet or the porous material and distributes the essential oil molecules or molecular groups into the surrounding air, so that the aromatherapy purpose is realized. This method requires a working environment with flowing air, and the diffusion speed of the essential oil is affected by the flowing air, so that the concentration uniformity is difficult to realize.

Based on the problem that exists among the above-mentioned prior art, need urgently to look for a portable low-power consumption champignon structure, can provide the fragrant effect of expanding of concentration relatively even, compact structure, small, low power dissipation, small in noise, portable is fit for multiple occasion and uses, more is fit for on-vehicle, the journey uses.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic portable champignon device of air diffusion formula to the above-mentioned defect of prior art.

The utility model provides a technical scheme that its technical problem adopted is: the portable fragrance device comprises a shell, an air outlet and an air inlet which are arranged on the shell, a micro motor which is fixedly arranged in the shell, a battery which is fixedly arranged in the shell, is electrically connected with the micro motor and supplies power to the micro motor, and a wind wheel type bracket which is arranged on an output shaft of the micro motor, rotates along with the output shaft and is used for fixedly placing fragrance sheets.

In the portable champignon device of electronic air diffusion formula, this shell includes casing, lower casing, sets up the separation disc between this last casing and lower casing and sets up the well casing between this separation disc and the lower casing.

In the portable fragrance device with electric air diffusion of the utility model, the air outlet is a strip-shaped ventilation hole arranged on the outer side wall of the upper shell, and the air inlet is a ventilation grid detachably arranged on the top of the upper shell; the ventilation fence is a disc-shaped ventilation fence, at least two buckles are arranged on the periphery of the ventilation fence, and buckling holes for the buckles to be clamped in are formed in the top of the upper shell.

In the portable fragrance device with electric air diffusion, the top of the outer side wall of the separation disc is provided with a first buckle groove, and the bottom of the inner side wall of the upper shell is provided with a first buckle which can be rotatably clamped into the first buckle groove;

or the top of the outer side wall of the separation disc is provided with a first external thread, and the bottom of the inner side wall of the upper shell is provided with a first internal thread which can be in threaded connection with the first external thread.

Among the portable champignon device of electronic air diffusion formula, this separation disc bottom periphery is equipped with first leg, this well casing top periphery is equipped with the second leg, this second leg can fix and insert to this first leg in, be equipped with on this first leg and supply to hang hanging hole, button hole and the lamp hole that the rope passed, this separation disc middle part is equipped with the through-hole that can supply this micro motor output shaft to pass.

Among the portable champignon device of electronic air diffusion formula, be equipped with the holding seat that supplies the fixed holding of this micro motor and the battery compartment that supplies the battery holding on this well casing, this champignon device is still including setting firmly the circuit board in this well casing, wear out to this well casing and separation disc outside and be used for controlling the control button that this micro motor opened or closed by this key hole and be connected with this circuit board electricity and wear out to this well casing and separation disc outside pilot lamp by this lamp hole.

In the portable fragrance device with electric air diffusion, a lock catch which is connected with the outer side wall in a sliding way is arranged on the outer side wall of the middle shell, a barb which is matched with the lock catch is arranged on the lower shell, and a barrier strip which can be hooked by the barb is arranged on the lock catch; when the lock catch slides to the first direction, the barb hooks the barrier strip; when the lock catch slides towards the second direction, the barb is separated from the barrier strip; the outer side wall of the middle shell is also provided with a spring which pushes the lock catch to slide towards the first direction;

or the bottom of the outer side wall of the middle shell is provided with a second fastening groove, and the top of the inner side wall of the lower shell is provided with a second fastener which can be rotatably clamped into the second fastening groove;

or the bottom of the outer side wall of the middle shell is provided with a second external thread, and the top of the inner side wall of the lower shell is provided with a second internal thread which can be in threaded connection with the second external thread.

Among the portable champignon device of electronic air diffusion formula, this champignon device is still including setting firmly the fragrant piece that locates on this wheeled bracket of wind and be close to this gas outlet position.

Among the portable champignon device of electronic air diffusion formula, this wheeled bracket bottom surface middle part of wind is equipped with the connecting hole that can supply this output shaft to insert fixed connection, this wheeled bracket top surface middle part of wind is equipped with the protrusion in the stationary dog of this wheeled bracket top surface of wind, this wheeled bracket top surface of wind still is equipped with a plurality of wind wheel blades, this fragrant piece middle part is equipped with the fixed orifices that can supply this stationary dog to insert fixed connection.

Among the portable champignon device of electronic air diffusion formula, this wind wheel formula bracket is circular bracket, this wind wheel formula bracket middle part is equipped with and supplies this output shaft to insert "D" shape hole of connecting, this wind wheel formula bracket top surface is equipped with two at least fan-shaped holding chambeies that can supply this fragrant piece embedding holding, this fragrant piece is the fan-shaped fragrant piece that can imbed to this fan-shaped holding intracavity.

Among the portable champignon device of electronic air diffusion formula, every fan-shaped holding chamber bottom all is equipped with the fan-shaped hole that runs through this fan-shaped bracket in two at least fan-shaped holding chambeies, be equipped with on this fragrant piece with the hole that pushes away of this fan-shaped hole intercommunication.

Implement the utility model discloses a portable champignon device of electronic air diffusion formula has following beneficial effect: use the utility model discloses a during portable champignon device of electronic air diffusion formula, can be fixed in on the wheeled bracket of wind with the fragrant piece, then control micro motor rotates, micro motor rotates and drives wheeled bracket of wind through the output shaft, and be located the fragrant piece rotation on the wheeled bracket of wind, the wheeled bracket of wind rotates and inhales the shell in with the outside air by the air inlet, and blow off outside the shell by the gas outlet, thereby form the air convection and take out the essential oil molecule or the molecular group in the fragrant piece, spread in the air on every side.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a schematic view of the exploded structure of the portable fragrance device with electric air diffusion;

fig. 2 is a schematic structural view of a wind wheel type bracket and a fragrance sheet in another embodiment of the portable fragrance device of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 1, in the first embodiment of the portable fragrance device with electric air diffusion, the fragrance device 1 includes a housing 2, an air outlet 3 and an air inlet 4 disposed on the housing 2, a micro motor 5 fixedly disposed in the housing 2, a battery 6 fixedly disposed in the housing 2 and electrically connected to the micro motor 5 and supplying power to the micro motor 5, and a wind wheel type bracket 7 disposed on an output shaft 33 of the micro motor 5 and rotating along with the output shaft 33 and used for fixedly placing a fragrance sheet 8.

Use the utility model discloses a during portable champignon device of electronic air diffusion formula 1, can be fixed in on the wheeled bracket 7 of wind with fragrant piece 8, then control micro motor 5 rotates, micro motor 5 rotates and drives wheeled bracket 7 of wind through output shaft 33, and be located fragrant piece 8 rotation on the wheeled bracket 7 of wind, wheeled bracket 7 of wind rotates and inhales outside air to shell 2 in by air inlet 4, and blow off to outside shell 2 by gas outlet 3, thereby form the air convection and take essential oil molecule or the molecular group in fragrant piece 8 out, spread in the air on every side.

Specifically, in the present embodiment, the housing 2 includes an upper case 9, a lower case 10, a separation disc 11 provided between the upper case 9 and the lower case 10, and a middle case 12 provided between the separation disc 11 and the lower case 10. The air outlet 3 is a strip-shaped vent hole 14 arranged on the outer side wall of the upper shell 9, and the air inlet 4 is a vent bar 13 detachably arranged on the top of the upper shell 9. The ventilation bar 13 is a disc-shaped ventilation bar 13, the periphery of the ventilation bar 13 is provided with at least two buckles 15, and the top of the upper shell 9 is provided with a buckle hole 16 for the buckles 15 to buckle. The utility model discloses in, through set up separation disc 11 between last casing 9 and well casing 12, can prevent that essential oil on the fragrant piece 8 from causing the corruption to circuit and battery 6 in getting into well casing 12.

In the rotation process of the wind wheel type bracket 7, air enters the upper shell 9 from the ventilation fence 13 at the top of the upper shell 9, flows out of the upper shell 9 from the through hole 23 after rebounding through the separation disc 11, and brings out essential oil molecules or molecular groups in the fragrance sheet 8 to be diffused into the surrounding air.

In this embodiment, the top of the outer sidewall of the separation plate 11 is provided with a first fastening slot 17, and the bottom of the inner sidewall of the upper housing 9 is provided with a first fastening member which can be rotatably fastened into the first fastening slot 17. When the upper shell 9 and the separation disc 11 are fixedly connected, the upper shell 9 is only required to be buckled at the top of the separation disc 11, and the upper shell 9 is rotated to enable the first fastener to be clamped into the first buckle groove 17, so that the upper shell 9 and the separation disc 11 can be fixedly connected.

In another embodiment, the top of the outer sidewall of the separation disc 11 is provided with a first external thread, and the bottom of the inner sidewall of the upper shell 9 is provided with a first internal thread capable of being screwed with the first external thread. When the upper shell 9 and the separation disc 11 are fixedly connected, the upper shell 9 and the separation disc 11 can be fixedly connected by rotating the upper shell 9 and screwing the first external thread and the first internal thread.

Furthermore, the bottom periphery of the separation disc 11 is provided with a first surrounding wall 18, the top periphery of the middle shell 12 is provided with a second surrounding wall 19, the second surrounding wall 19 can be fixedly inserted into the first surrounding wall 18, the first surrounding wall 18 is provided with a hanging hole 20 for a hanging rope to pass through, a key hole 21 and a lamp hole 22, and the middle part of the separation disc 11 is provided with a through hole 23 for an output shaft 33 of the micro motor 5 to pass through. It will be appreciated that the first wall 18 and the second wall 19 are connected by an interference fit.

Specifically, the middle casing 12 is provided with a holding seat 24 for fixedly holding the micro motor 5, and a battery compartment 25 for holding the battery 6, and the aromatherapy device 1 further includes a circuit board 26 fixedly disposed in the middle casing 12, a control button 27 extending out of the middle casing 12 and the separation disc 11 through the button hole 21 and used for controlling the micro motor 5 to be turned on or off, and an indicator light 28 electrically connected to the circuit board 26 and extending out of the middle casing 12 and the separation disc 11 through the light hole 22. It will be appreciated that the housing seat 24 cooperates with the micromotor 5 in the same way as an interference fit.

In this embodiment, the user can control the wind wheel type bracket 7 by controlling the micro motor 5 to be turned on or off through the control button 27.

In this embodiment, a lock catch 29 slidably connected to the outer side wall is disposed on the outer side wall of the middle housing 12, a barb 31 cooperating with the lock catch 29 is disposed on the lower housing 10, and a barrier strip 30 for hooking the barb 31 is disposed on the lock catch 29; when the lock catch 29 slides towards the first direction, the barb 31 catches on the barrier strip 30; when the lock catch 29 slides in the second direction, the barb 31 is disengaged from the stop strip 30; the outer side wall of the middle shell 12 is further provided with a spring 32 for pushing the lock catch 29 to slide towards the first direction.

When the lower shell 10 and the middle shell 12 need to be fixedly connected, the lower shell 10 is buckled at the bottom of the middle shell 12, so that the barbs hook the barrier strips 30, and the fixed connection of the lower shell 10 and the middle shell 12 is realized. At this time, the spring 32 pushes the latch 29 to slide in the first direction by its own elastic restoring force, and the retaining barb 31 is always hooked on the barrier strip 30. When the lower case 10 needs to be removed, the latch 29 can be pushed in the second direction, and the latch 29 drives the barrier 30 to disengage from the barb 31, so that the lower case 10 can be removed from the middle case 12 for operations such as replacing the battery 6.

In another embodiment, the bottom of the outer sidewall of the middle housing 12 is provided with a second slot, and the top of the inner sidewall of the lower housing 10 is provided with a second fastener which can be rotatably snapped into the second slot. When the middle shell 12 and the lower isolation shell 10 are fixedly connected, the lower shell 10 is only needed to be buckled at the bottom of the middle shell 12, and the lower shell 10 is rotated to enable the second fastener to be clamped into the second fastening groove, so that the fixed connection between the lower shell 10 and the middle shell 12 can be realized.

In another embodiment, the bottom of the outer sidewall of the middle shell 12 is provided with a second external thread, and the top of the inner sidewall of the lower shell 10 is provided with a second internal thread capable of being screwed with the second external thread. Similarly, when the middle shell 12 and the lower partition shell 10 are fixedly connected, the lower shell 10 is only required to be buckled at the bottom of the middle shell 12, and the lower shell 10 is rotated to enable the second external thread to be in threaded connection with the second internal thread, so that the lower shell 10 and the middle shell 12 can be fixedly connected.

Specifically, the aromatherapy device 1 further comprises an incense piece 8 fixedly arranged on the wind wheel type bracket 7 and close to the air outlet 3. The middle part of the bottom surface of the wind wheel type bracket 7 is provided with a connecting hole for the output shaft 33 to be inserted and fixedly connected, the middle part of the top surface of the wind wheel type bracket 7 is provided with a fixed claw 34 protruding out of the top surface of the wind wheel type bracket 7, the top surface of the wind wheel type bracket 7 is also provided with a plurality of wind wheel blades 35, and the middle part of the incense piece 8 is provided with a fixed hole 36 for the fixed claw 34 to be inserted and fixedly connected. Preferably, the fixing claw 34 is a polygonal convex column protruding from the middle of the top surface of the wind wheel type bracket 7, and a polygonal fixing hole 36 for the polygonal convex column to be inserted into and interference-fitted into is formed in the middle of the fragrance sheet 8.

The utility model discloses an aromatherapy device 1 drives micro motor 5 and wheeled bracket 7 of wind through battery 6 and rotates, forms the volatile air current of essential oil molecule or molecule group on promoting fragrant piece 8, can regard as portable low-power consumption aromatherapy device 1 to use, can provide the fragrant effect of expanding of concentration relatively even, compact structure, small, low power dissipation, small in noise, portable is fit for multiple occasion and uses, more is fit for uses such as on-vehicle, journey.

In another embodiment of the present invention, as shown in fig. 2, the wind wheel type bracket 7 is a circular bracket 7, the middle of the wind wheel type bracket 7 is provided with a "D" shaped hole 71 for the insertion connection of the output shaft, the top surface of the wind wheel type bracket 7 is provided with at least two fan-shaped accommodating cavities 72 for the insertion and the accommodation of the incense burner 8, and the incense burner 8 is a fan-shaped incense burner 8 that can be inserted into the fan-shaped accommodating cavity 72.

Preferably, the at least two fan-shaped receiving cavities 72 are four right-angle fan-shaped receiving cavities 72, and the fan-shaped fragrance sheets 8 are right-angle fan-shaped fragrance sheets 8. Each right-angle fan-shaped fragrant piece 8 placed in the four right-angle fan-shaped accommodating cavities 72 can be fragrant pieces 8 of the same essential oil, and can also be fragrant pieces 8 of different essential oils, and when the fragrant pieces 8 of different essential oils are used, compound aromatherapy can be realized. It is understood that the connection and engagement manner of the fan-shaped fragrance sheet 8 and the fan-shaped accommodation cavity 72 is interference fit, or other fastening connection manner.

Further, for promoting the air circulation and playing a better aromatherapy effect, the bottom of each fan-shaped accommodating cavity 72 in the at least two fan-shaped accommodating cavities 72 is provided with a fan-shaped hole 73 penetrating through the wind wheel type bracket 7, and the fragrance sheet 8 is provided with a wind pushing hole 74 communicated with the fan-shaped hole 73. In the rotation process of the wind wheel type bracket 7 and the fragrance sheet 8, the outside air can enter the shell 2 from the air inlet 4 and then flows out from the air pushing hole 74, the fan-shaped hole 73 and the air outlet 3, so that a better fragrance effect is realized.

The hole wall at one side of the air pushing hole 74 has a certain gradient, and when the fragrance sheet rotates along with the wind wheel, the hole wall at one side with the gradient can push air along the radial direction, so that the air flows along the radial direction, and the air circulation inside and outside the device is realized. In various embodiments, the ventilation apertures 74 have different shapes, indicating that the scented sheet can be made in a variety of ventilation configurations. It will be appreciated that the preferred 4 fan-shaped vanes are the same shaped air-pushing holes 74 to ensure dynamic and static balance.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides an electronic portable champignon device of air diffusion formula which characterized in that, the champignon device include the shell, set up in gas outlet and air inlet on the shell, set firmly in micromotor in the shell, set firmly in the shell with the micromotor electricity is connected and for the battery of micromotor power supply and set up in along with the output shaft rotates and is used for the fixed wheeled bracket of fragrant piece of placing on the micromotor output shaft.

2. The electric air diffusion type portable aromatherapy device according to claim 1, wherein the housing comprises an upper case, a lower case, a separation disc disposed between the upper case and the lower case, and a middle case disposed between the separation disc and the lower case.

3. The device of claim 2, wherein the air outlet is a strip-shaped ventilation hole arranged on the outer side wall of the upper casing, and the air inlet is a ventilation grid detachably arranged on the top of the upper casing; the ventilation bars are disc-shaped ventilation bars, at least two buckles are arranged on the periphery of each ventilation bar, and buckling holes for the buckles to be clamped in are formed in the top of the upper shell.

4. The device of claim 3, wherein a first buckle slot is arranged at the top of the outer side wall of the separation disc, and a first buckle piece which can be rotatably clamped into the first buckle slot is arranged at the bottom of the inner side wall of the upper shell;

5. The portable fragrance device of claim 2, wherein the separator has a first wall around the bottom, a second wall around the top, the second wall can be fixed in the first wall, the first wall has a hanging hole, a key hole and a lamp hole for the hanging rope to pass through, and the separator has a through hole in the middle for the output shaft of the micro motor to pass through.

6. The portable fragrance device of claim 5, wherein the middle housing has a receptacle for the micro motor to be fixedly received, a battery compartment for the battery to be received, a circuit board fixed in the middle housing, a control button passing through the button hole to the outside of the middle housing and the separation disc for controlling the micro motor to be turned on or off, and an indicator light electrically connected to the circuit board and passing through the lamp hole to the outside of the middle housing and the separation disc.

7. The device of claim 2, wherein a lock catch slidably connected with the outer side wall is arranged on the outer side wall of the middle shell, a barb matched with the lock catch is arranged on the lower shell, and a barrier strip for hooking the barb is arranged on the lock catch; when the lock catch slides towards the first direction, the barb hooks the barrier strip; when the lock catch slides towards the second direction, the barb is separated from the barrier strip; the outer side wall of the middle shell is also provided with a spring which pushes the lock catch to slide towards a first direction;

8. The device of claim 1, further comprising a fragrance sheet secured to the wheel bracket and adjacent to the air outlet.

9. The portable fragrance device of claim 8, wherein the middle of the bottom surface of the wind wheel bracket is provided with a connecting hole for the output shaft to be inserted and fixedly connected, the middle of the top surface of the wind wheel bracket is provided with a fixing claw protruding out of the top surface of the wind wheel bracket, the top surface of the wind wheel bracket is further provided with a plurality of wind wheel blades, and the middle of the fragrance sheet is provided with a fixing hole for the fixing claw to be inserted and fixedly connected.

10. The portable fragrance device of claim 8, wherein the wind wheel bracket is a circular bracket, the middle part of the wind wheel bracket is provided with a "D" shaped hole for the insertion connection of the output shaft, the top surface of the wind wheel bracket is provided with at least two fan-shaped accommodating cavities for the insertion and the accommodation of the fragrance sheet, and the fragrance sheet is a fan-shaped fragrance sheet which can be inserted into the fan-shaped accommodating cavities.

11. The device of claim 10, wherein a fan-shaped hole is formed at the bottom of each of the at least two fan-shaped receiving cavities and penetrates through the wind wheel type bracket, and the fragrance sheet is provided with a wind pushing hole communicated with the fan-shaped hole.