Electronic atomizer

Abstract

The utility model relates to the technical field of electronic atomization, and discloses an electronic atomizer which comprises a shell, a mounting support, an atomization assembly and a power supply device, and the mounting support is arranged in a containing cavity. The atomization assembly is arranged in the containing cavity. The power supply device is detachably installed on the side, away from the atomization assembly, of the installation support, the power supply device is used for providing electric energy for the atomization assembly, the power supply device comprises a battery cell bin, the end, away from the installation support, of the battery cell bin comprises a second clamping part, and the second clamping part is used for being matched with the first clamping part in a clamped mode so that the power supply device can be installed in the containing cavity. The power supply device in the electronic atomizer can be quickly disassembled and assembled, the user experience is improved, the power supply device in the electronic atomizer can be conveniently replaced and recycled, and pollution to the environment is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of electronic atomization, and in particular to an electronic atomizer. Background Art

[0002] The electronic atomizer uses the voltage provided by the battery to drive the heating element in the atomization component to work, and then heats the atomization matrix to produce an aerosol for consumers to inhale. It does not require open flame heating, avoiding the occurrence of fire accidents. The battery of a traditional electronic atomizer is generally fixed inside it, and its disassembly and assembly require the use of special tools. The disassembly and assembly are troublesome and reduce the user experience. In addition, with the growing consumer group of electronic atomizers, randomly discarded electronic atomizers seriously pollute the environment. How to recycle electronic atomizers has become a technical problem that atomization companies and local regulatory agencies urgently need to solve. Utility Model Content

[0003] The present application provides an electronic atomizer, in which a power supply device can be quickly disassembled and installed, thereby improving the user experience and facilitating the replacement and recycling of the power supply device in the electronic atomizer, thereby reducing pollution to the environment.

[0004] An electronic atomizer is provided in one embodiment of the present application, comprising: a shell, having a accommodating cavity, the accommodating cavity having a disassembly opening, a first clamping portion being arranged on a side wall of the accommodating cavity near the disassembly opening; a mounting bracket being arranged in the accommodating cavity; an atomizing assembly being arranged in the accommodating cavity; and a power supply device, which is detachably mounted on a side of the mounting bracket away from the atomizing assembly, the power supply device being used to provide electrical energy to the atomizing assembly, the power supply device comprising a battery cell compartment, an end of the battery cell compartment away from the mounting bracket comprising a second clamping portion, the second clamping portion being used to clamp and cooperate with the first clamping portion so as to install the power supply device in the accommodating cavity.

[0005] In one embodiment, the first clamping portion is arranged on the inner wall of the accommodating cavity, and a first recessed structure is provided on the side wall of the accommodating cavity; at least part of the structure of the second clamping portion is located in the first recessed structure and is engaged with the first clamping portion to enable the battery cell compartment to be installed in the accommodating cavity.

[0006] In one embodiment, the first clamping portion includes a clamping groove, and the second clamping portion includes a pressing end and a clamping end, the pressing end is connected to the wall of the battery cell compartment, and the pressing end can move relative to the battery cell compartment, and the clamping end has a protruding structure on the side away from the wall of the battery cell compartment, and the protruding structure is used to clamp into the clamping groove.

[0007] In one embodiment, a second recessed structure is provided on the wall of the battery cell compartment, the pressing end is connected to the side wall of the second recessed structure, and an escape space is provided between the second clamping portion and the second recessed structure.

[0008] In one embodiment, a non-slip structure is provided on a side of the pressing end facing away from the compartment wall of the battery cell compartment.

[0009] In one embodiment, the electronic atomizer further includes a liquid storage device, which is detachably connected to the atomization component, and the liquid storage device is used to supply the atomization component with atomization matrix.

[0010] In one embodiment, the liquid storage device is installed in the accommodating cavity, and the liquid storage device and the power supply device are arranged side by side and in parallel.

[0011] In one embodiment, the shell covers at least part of the structure of the power supply device and at least part of the structure of the liquid storage device, and when the power supply device and the liquid storage device are both assembled in the accommodating cavity, after the power supply device is detached from the accommodating cavity, the liquid storage device can be detached from the atomization assembly.

[0012] In one embodiment, the shell includes a connecting side wall and a pair of oppositely arranged front walls and back walls, the connecting side wall is connected to the front wall and the back wall respectively, and the connecting side wall, the front wall and the back wall all cover at least part of the structure of the power supply device, the front wall and the back wall all cover at least part of the structure of the liquid storage device, and the first clamping portion is arranged on the connecting side wall.

[0013] In one embodiment, the battery cell compartment is slidably connected to the inner wall of the accommodating cavity via a guide rail structure.

[0014] An electronic atomizer includes a shell, a mounting bracket, an atomizer assembly, and a power supply device. The shell has a accommodating cavity, the accommodating cavity has a disassembly opening, a first clamping portion is provided on the side wall of the accommodating cavity near the disassembly opening, the mounting bracket and the atomizer assembly are provided in the accommodating cavity, the power supply device is detachably installed on a side of the mounting bracket away from the atomizer assembly, the power supply device includes a battery cell compartment, and the end of the battery cell compartment away from the mounting bracket includes a second clamping portion, the second clamping portion is used to engage with the first clamping portion to install the power supply device in the accommodating cavity. The electronic atomizer of the present application can quickly disassemble or install the power supply device on the electronic atomizer through the arrangement of the clamping structure of the first clamping portion on the shell and the second clamping portion on the battery cell compartment, which is conducive to the recycling of discarded power supply devices, reduces pollution to the environment, and can also improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the electronic atomizer of the present utility model;

[0016] Figure 2 is a cross-sectional view of the electronic atomizer of the present utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the housing of the electronic atomizer of the present utility model;

[0018] Figure 4It is an exploded schematic diagram of a part of the structure of the electronic atomizer of the utility model;

[0019] Figure 5 It is a structural schematic diagram of the mounting bracket of the electronic atomizer of the present utility model.

[0020] Figure numerals: electronic atomizer-100, housing-110, accommodating chamber-111, first recessed structure-1111, first guide groove-1112, disassembly opening-112, first clamping portion-113, connecting side wall-114, front wall-115, back wall-116; mounting bracket-120, first limiting groove-121; circuit board-130, connecting terminal-131, atomizing assembly-140, atomizing core-141, atomizing core sealing silicone-142, oil-guiding cotton-143; power supply device-150, battery cell compartment-151, compartment wall-1511, second clamping portion-1512, pressing end-1512, anti-slip structure-15121, clamping end-1512 122, protruding structure-151221, connecting piece-1513, electrode column-15131, second recessed structure-1514, avoidance space-15141, battery-152, shockproof gasket-153; liquid storage device-160, liquid storage cup-161, first guide protrusion-1611, first limiting protrusion-1612, liquid storage cup anti-leakage silicone-162, liquid storage cup cover-163, liquid storage cup child lock inner cover-164, liquid storage cup child lock outer cover-165; lower sealing silicone-170, oil cup shell-180, suction nozzle assembly-190, suction nozzle-191, suction nozzle silicone plug-192, suction nozzle anti-leakage silicone-193, top oil absorption cotton-194, rubber ring-195. DETAILED DESCRIPTION

[0021] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0022] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0023] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0024] The present invention provides an electronic atomizer 100. Figure 1-5 , including a housing 110 , a mounting bracket 120 , an atomization assembly 140 and a power supply device 150 .

[0025] Please refer to Figure 1-4 The housing 110 has a housing chamber 111, the housing chamber 111 has a disassembly opening 112, and a first clamping portion 113 is provided on the side wall of the housing chamber 111 near the disassembly opening 112. The mounting bracket 120 is disposed in the housing chamber 111. The atomizer assembly 140 is disposed in the housing chamber 111. The power supply device 150 is detachably mounted on a side of the mounting bracket 120 away from the atomizer assembly 140, and the power supply device 150 is used to provide power to the atomizer assembly 140. The power supply device 150 includes a battery cell compartment 151, and one end of the battery cell compartment 151 away from the mounting bracket 120 includes a second clamping portion 1512, and the second clamping portion 1512 is used to clamp and cooperate with the first clamping portion 113 to install the power supply device 150 in the housing chamber 111. In some embodiments, the electronic atomizer 100 also includes a circuit board 130, and the circuit board 130 is disposed on the mounting bracket 120, and the circuit board 130 is provided with a connection terminal 131. The power supply device 150 further includes a battery 152 . The battery 152 is disposed in the battery compartment 151 . The battery 152 is detachably electrically connected to the connection terminal 131 .

[0026] Since the side wall of the accommodating cavity 111 is provided with a first clamping portion 113 near the disassembly opening 112, the end of the battery compartment 151 away from the mounting bracket 120 includes a second clamping portion 1512. Through the clamping cooperation between the first clamping portion 113 and the second clamping portion 1512, the power supply device 150 can be quickly disassembled and installed in the accommodating cavity 111, which is convenient for replacing the battery 152, is conducive to the recycling of the battery 152, reduces pollution to the environment, and can also improve the use experience of consumers.

[0027] It should be noted that, in one embodiment of the present invention, the battery 152 may be indirectly connected to the connection terminal 131. In other embodiments, the battery 152 may be directly connected to the connection terminal 131. Since the battery 152 is connected to the connection terminal 131 through the positive and negative tabs, the number of the connection terminals 131 is 2.

[0028] Please refer to Figure 1-3 In this embodiment, the first clamping portion 113 is disposed on the inner side wall of the accommodating cavity 111, and a first recessed structure 1111 is disposed on the side wall of the accommodating cavity 111. At least part of the second clamping portion 1512 is located in the first recessed structure 1111 and is engaged with the first clamping portion 113, so that the battery compartment 151 is installed in the accommodating cavity 111.

[0029] The disassembly opening 112 is provided at the bottom of the housing 110, and the provision of the first recessed structure 1111 facilitates the first clamping portion 113 to be clamped and matched with the second clamping portion 1512. The bottom of the battery compartment 151, the second clamping portion 1512 and the housing 110 are enclosed to form a closed accommodating cavity 111. In addition, the first clamping portion 113 is provided on the inner side wall of the accommodating cavity 111, so that the second clamping portion 1512 and the first clamping portion 113 are clamped and matched inside the accommodating cavity 111, which can make the appearance of the electronic atomizer 100 more beautiful.

[0030] Please refer to Figure 2 The first clamping portion 113 includes a clamping groove, and the second clamping portion 1512 includes a pressing end 15121 and a clamping end 15122. The pressing end 15121 is connected to the wall 1511 of the battery cell compartment 151, and the pressing end 15121 can move relative to the battery cell compartment 151. The side of the clamping end 15122 away from the wall 1511 of the battery cell compartment 151 has a protruding structure 151221, and the protruding structure 151221 is used to be clamped into the clamping groove, so as to install the power supply device 150 in the accommodating cavity 111. Specifically, the pressing end 15121 is located in the first recessed structure 1111, and the shape of the pressing end 15121 is adapted to the first recessed structure 1111.

[0031] The cooperation between the protruding structure 151221 and the snap-in groove is conducive to limiting the power supply device 150 inside the accommodating cavity 111, and can improve the stability of the assembly structure between the power supply device 150 and the shell 110, and prevent the power supply device 150 from falling off from the disassembly opening 112 unintentionally.

[0032] Please refer to Figure 2 A second recessed structure 1514 is provided on the wall 1511 of the battery cell compartment 151 , the pressing end 15121 is connected to the side wall of the second recessed structure 1514 , and an escape space 15141 is provided between the second clamping portion 1512 and the second recessed structure 1514 .

[0033] The arrangement of the avoidance space 15141 is conducive to the movement of the second engaging portion 1512, and facilitates the protruding structure 151221 to be engaged in or disengaged from the engaging groove. At the same time, the space of the accommodating cavity 111 can also be saved.

[0034] Please refer to Figure 2 , an anti-skid structure 151211 is provided on the side of the side wall of the pressing end 15121 away from the battery cell compartment 151. Specifically, the anti-skid structure 151211 is provided in a straight line. In other embodiments, the anti-skid structure 151211 can also be provided in other shapes such as a circle or a triangle, and can be used as a gripper for disassembling the power supply device 150, as long as it is conducive to applying force to remove the power supply device 150 from the accommodating cavity 111 from the disassembly opening 112, and there is no specific limitation on this.

[0035] Please refer to Figure 2 The battery 152 is disposed as a whole in the battery compartment 151. The battery compartment 151 is provided with a connector 1513. One end of the connector 1513 is detachably connected to the connection terminal 131, and the other end is detachably connected to the battery 152. The second clamping portion 1512 is disposed on the outer wall of the battery compartment 151. Specifically, in this embodiment, the connector 1513 may be a battery compartment cover covering the battery compartment 151. An electrode column 15131 is disposed on the battery compartment cover. One end of the electrode column 15131 is connected to the connection terminal 131, and the other end is connected to the battery 152.

[0036] The battery 152 is disposed as a whole in the battery compartment 151, and the battery compartment cover is disposed so that the interior of the battery compartment 151 is a closed structure. With such a design, on the one hand, the battery compartment 151 can be unlocked by the second clamping portion 11512, so that the battery 152 can be easily removed from the accommodating cavity 111; on the other hand, it can prevent the atomized matrix from dripping onto the battery 152, causing a short circuit in the battery 152, thereby improving the safety of the battery 152.

[0037] Please refer to Figure 2 The electronic atomizer 100 further includes a liquid storage device 160, which is detachably connected to the atomizing assembly 140 and is used to supply the atomizing matrix to the atomizing assembly 140. By providing the liquid storage device 160, the atomizing matrix can be supplied to the atomizing assembly 140 at any time, which is conducive to improving the service life of the electronic atomizer 100.

[0038] Please refer to Figure 1 and Figure 4 The liquid storage device 160 is installed in the accommodating cavity 111, and the liquid storage device 160 and the power supply device 150 are arranged side by side in parallel. Specifically, the liquid storage device 160 and the power supply device 150 are arranged side by side on the side of the mounting bracket 120 facing the disassembly opening 112. The liquid storage device 160 and the power supply device arranged side by side have a simple structure and are convenient for users to assemble and disassemble.

[0039] Please refer to Figure 1 and Figure 4 The housing 110 covers at least part of the structure of the power supply device 150 and at least part of the structure of the liquid storage device 160, and when the power supply device 150 and the liquid storage device 160 are both assembled in the accommodating chamber 111, after the power supply device 150 is separated from the accommodating chamber 111, the liquid storage device 160 can be separated from the atomizing assembly 140. The stability of the connection between the liquid storage device 160 and the atomizing assembly 140 is improved to prevent the liquid storage device 160 from falling off and causing oil leakage.

[0040] In some embodiments, a first guide groove 1112 is provided on the inner wall of the accommodating cavity 111, and a first guide protrusion 1611 is provided on the liquid storage device 160. Through the cooperation between the first guide protrusion 1611 and the first guide groove 1112, the liquid storage device 160 can be accurately installed in the accommodating cavity 111. In addition, in order to fix the liquid storage device 160, a first limiting protrusion 1612 is also provided on the liquid storage device 160, and a first limiting groove 121 is also provided on the mounting bracket 120. The first limiting protrusion 1612 is aligned with the first limiting groove 121. When the liquid storage device 160 is installed in the accommodating cavity 111, the first limiting protrusion 1612 is inserted into the first limiting groove 121. In this way, the liquid storage device 160 is fixed in the accommodating cavity 111. Since the bottom of the liquid storage device 160 and the bottom of the power supply device 150 both extend out of the mounting bracket 120, and the bottom of the liquid storage device 160 and the bottom of the power supply device 150 are aligned, the liquid storage device 160 can be easily removed from the accommodating cavity 111 after the power supply device 150 is removed from the accommodating cavity 111.

[0041] In some embodiments, the housing 110 includes a connecting side wall 114 and a pair of oppositely disposed front walls 115 and back walls 116, the connecting side wall 114 is respectively connected to the front wall 115 and the back wall 116, and the connecting side wall 114, the front wall 115 and the back wall 116 all cover at least part of the structure of the power supply device 150, and the front wall 115 and the back wall 116 all cover at least part of the structure of the liquid storage device 160.

[0042] The housing 110 is semi-enclosed around the power supply device 150 and the liquid storage device 160 , which is convenient for disassembly and installation of the power supply device 150 and the liquid storage device 160 .

[0043] In some embodiments, the battery compartment 151 is slidably connected to the inner side wall of the accommodating cavity 111 through a guide rail structure. Specifically, the inner side wall of the accommodating cavity 111 is provided with a second guide groove, and the outer surface of the battery compartment 151 is provided with a second guide protrusion, which is used to be embedded in the second guide groove to preliminarily position the power supply device 150 in the accommodating cavity 111. Alternatively, the outer surface of the battery compartment 151 is provided with a second guide groove, and the inner side wall of the accommodating cavity 111 is provided with a second guide protrusion, which is used to be embedded in the second guide groove to preliminarily position the power supply device 150 in the accommodating cavity 111.

[0044] The provision of the second guide groove and the second guide protrusion facilitates the preliminary positioning of the power supply device 150 in the accommodating cavity 111 , thereby providing conditions for the rapid disassembly and installation of the power supply device 150 .

[0045] Please refer to Figure 4 In the battery cell compartment 151, shockproof gaskets 153 are also provided at both ends and one side of the battery 152. In addition, in the present invention, the battery 152 can be a battery 152 with a positive electrode ear and a negative electrode ear located on the same side, or a battery 152 with positive and negative electrodes located on opposite sides as shown in the figure, and the electrode away from the circuit board 130 is connected to the end close to the circuit board 130 by a lead wire to be electrically connected to the connection terminal 131 of the circuit board 130.

[0046] Please refer to Figure 2 and 4 The liquid storage device 160 includes a liquid storage cup 161, a liquid storage cup anti-leakage silicone 162, and a liquid storage cup cover 163. The liquid storage cup cover 163 covers the liquid storage cup 161. The liquid storage cup anti-leakage silicone 162 is arranged between the liquid storage cup 161 and the liquid storage cup cover 163 to prevent leakage of the atomized matrix. The first guide protrusion 1611 and the first limit protrusion 1612 are both arranged on the outer wall of the liquid storage cup 161.

[0047] In addition, the liquid storage device 160 also includes a liquid storage cup child lock inner cover 164 and a liquid storage cup child lock outer cover 165. When the electronic atomizer 100 is in use, the liquid storage cup child lock inner cover 164 and the liquid storage cup child lock outer cover 165 are not assembly parts.

[0048] Please refer to Figure 4The electronic atomizer 100 of the utility model further comprises a lower sealing silicone 170 and an atomizing assembly 140. The lower sealing silicone 170 is arranged on the side of the mounting bracket 120 away from the power supply device 150 and the liquid storage cup 161. The lower sealing silicone 170 is provided with two through holes. The atomizing assembly 140 comprises an atomizing core 141 and an atomizing core sealing silicone 142. The outer periphery of one end of the atomizing core 141 connected to the suction nozzle assembly 190 is sealed with the atomizing core sealing silicone 142. 2 seal, the atomizer core 141 is electrically connected to the circuit board 130, the atomizer core 141 is inserted into the through hole, the upper periphery of the atomizer core 141 is exposed to the lower sealing silicone 170, and the outer periphery of the atomizer core 141 exposed to the lower sealing silicone 170 is provided with an oil-conducting cotton 143. After the oil-conducting cotton 143 absorbs the atomized matrix in the liquid storage cup 161, the atomizer core 141 heats the atomized matrix in the oil-conducting cotton 143 to generate aerosol for consumers to inhale.

[0049] Please refer to Figure 4 The electronic atomizer 100 also includes a nozzle assembly 190 and an oil cup shell 180. One end of the oil cup shell 180 is connected to the mounting bracket 120. The oil cup shell 180 is arranged around the atomization assembly 140, and the side of the oil cup shell 180 away from the mounting bracket is connected to the nozzle assembly 190. The nozzle assembly 190 includes a nozzle 191, a nozzle oil leakage prevention silicone 193, a top oil absorption cotton 194, a rubber ring 195 and a nozzle silicone plug 192. The nozzle silicone plug 192 is used to seal the inhalation port of the nozzle 191. The nozzle oil leakage prevention silicone 193 and the top oil absorption cotton 194 are stacked inside the nozzle 191. The rubber ring 195 is used to seal the connection between the nozzle 191 and the oil cup shell 180.

[0050] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An electronic atomizer, characterized in that: include: The housing has a housing cavity, the housing cavity has a disassembly opening, and a first clamping portion is provided on a side wall of the housing cavity near the disassembly opening; A mounting bracket is disposed in the accommodating cavity; An atomizing assembly is disposed in the accommodating chamber; And a power supply device, which is detachably mounted on a side of the mounting bracket away from the atomizer assembly, and is used to provide electrical energy to the atomizer assembly. The power supply device includes a battery cell compartment, and one end of the battery cell compartment away from the mounting bracket includes a second clamping portion, and the second clamping portion is used to clamp and cooperate with the first clamping portion to install the power supply device in the accommodating cavity.

2. The electronic atomizer according to claim 1, characterized in that: The first clamping portion is arranged on the inner side wall of the accommodating cavity, and a first recessed structure is provided on the side wall of the accommodating cavity; at least part of the structure of the second clamping portion is located in the first recessed structure and is engaged with the first clamping portion, so that the battery cell compartment is installed in the accommodating cavity.

3. The electronic atomizer according to claim 1, characterized in that: The first clamping portion includes a clamping groove, and the second clamping portion includes a pressing end and a clamping end, the pressing end is connected to the warehouse wall of the battery cell warehouse, and the pressing end can move relative to the battery cell warehouse, and the clamping end has a protruding structure on the side away from the warehouse wall of the battery cell warehouse, and the protruding structure is used to clamp into the clamping groove.

4. The electronic atomizer according to claim 3, characterized in that: A second recessed structure is provided on the wall of the battery cell compartment, the pressing end is connected to the side wall of the second recessed structure, and an escape space is provided between the second clamping portion and the second recessed structure.

5. The electronic atomizer according to claim 3, characterized in that: A side of the pressing end facing away from the compartment wall of the battery cell compartment is provided with an anti-slip structure.

6. The electronic atomizer according to any one of claims 1 to 5, characterized in that: The electronic atomizer also includes a liquid storage device, which is detachably connected to the atomization component and is used to supply atomization matrix to the atomization component.

7. The electronic atomizer according to claim 6, characterized in that: The liquid storage device is installed in the accommodating cavity, and the liquid storage device and the power supply device are arranged side by side and in parallel.

8. The electronic atomizer according to claim 7, characterized in that: The shell covers at least part of the structure of the power supply device and at least part of the structure of the liquid storage device, and when the power supply device and the liquid storage device are both assembled in the accommodating cavity, after the power supply device is detached from the accommodating cavity, the liquid storage device can be detached from the atomization assembly.

9. The electronic atomizer according to claim 8, characterized in that: The shell includes a connecting side wall and a pair of oppositely arranged front wall and back wall, the connecting side wall is respectively connected to the front wall and the back wall, and the connecting side wall, the front wall and the back wall all cover at least part of the structure of the power supply device, the front wall and the back wall all cover at least part of the structure of the liquid storage device, and the first clamping portion is arranged on the connecting side wall.

10. The electronic atomizer according to claim 1, characterized in that: The battery cell compartment is slidably connected to the inner wall of the accommodating cavity via a guide rail structure.

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