Global universal conversion equipment assembly structure

Abstract

The utility model discloses a globally universal conversion equipment assembly structure, which comprises a lower bracket, an American standard key assembly and a British standard key assembly which are connected to the top of the lower bracket, and an European standard key assembly arranged on one side of the lower bracket. The beneficial effects of the utility model are that the British standard key assembly, the American standard key assembly and the European standard key assembly can be combined into a whole according to the own structure through the electrode connecting sheet and the British standard key assembly, the American standard key assembly and the European standard key assembly connected with the electrode connecting sheet, and the British standard key assembly, the American standard key assembly and the European standard key assembly can be conveniently disassembled without influencing the use when the disassembly is needed; the British standard key assembly, the American standard key assembly and the European standard key assembly are different in structure, in the assembling process, the British standard key assembly and the American standard key assembly are assembled at the top of the lower support, the American standard key assembly is arranged in the British standard key assembly, space is saved, the European standard key assembly is arranged on one side of the lower support, and it is guaranteed that the British standard key assembly, the American standard key assembly and the European standard key assembly form a whole. And subsequent disassembly and assembly can also be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of universal conversion equipment, in particular to an assembly structure of a global universal conversion equipment. Background Art

[0002] Conversion device, also known as conversion plug, literally means to convert one kind of plug into another kind of plug (such as telephone power plug, USB charging plug, computer power plug, universal power plug of various countries, etc.), convert different power plugs of different countries or power plug of one country into power plug of another country or multiple countries.

[0003] Since there are various conversion plugs, when producing conversion equipment, different conversion plugs need to be placed in a shell to ensure more convenient use. However, the installation method of multiple conversion plugs is usually to fix them together and then place them inside the shell, which makes it inconvenient to disassemble and assemble one of the conversion plugs. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a global universal conversion equipment assembly structure.

[0005] It includes a lower bracket, a US-standard button assembly and a UK-standard button assembly connected to the top of the lower bracket, and a European-standard button assembly arranged on one side of the lower bracket, wherein the European-standard button assembly is arranged on one side of the UK-standard button assembly, and the US-standard button assembly is arranged in the middle of the UK-standard button assembly;

[0006] A plurality of columns extend from the top of the lower bracket, the US standard button assembly and the UK standard button assembly are sleeved on the outside of the columns, the tops of the UK standard button assembly, the US standard button assembly and the European standard button assembly are clamped with an upper bracket, an electrode connecting piece is installed inside the upper bracket, and the electrode connecting piece is electrically connected to the UK standard button assembly, the US standard button assembly and the European standard button assembly.

[0007] Furthermore, the top of the upper bracket is a concave structure, and a conversion plug-in is clamped inside the concave part of the upper bracket, and the conversion plug-in corresponds to the electrode connecting piece.

[0008] Furthermore, a spring is provided inside the recess of the upper bracket, and two ends of the spring respectively abut against the conversion plug-in and the upper bracket.

[0009] Furthermore, the US standard button assembly includes a US standard circuit component sleeved on the lower bracket, a US standard plug electrically connected to the bottom of the US standard circuit component, and a US standard paddle fixed to one side of the US standard circuit component.

[0010] Further, the British standard button assembly includes a British standard circuit component sleeved on the lower bracket, a British standard plug electrically connected to the bottom of the British standard circuit component, and a British standard paddle fixed on one side of the British standard circuit component. The British standard circuit component is in a horizontal U-shaped structure and wraps around the outside of the American standard circuit component.

[0011] Further, the European standard button assembly includes a movable cylinder provided on one side of the lower bracket, a European standard circuit component slidably disposed inside the movable cylinder, a European standard plug electrically connected to the bottom of the European standard circuit component, and a European standard paddle fixed on one side of the European standard circuit component. One side of the lower bracket is in a concave shape, and one side of the movable cylinder fits against one side of the lower bracket and is adapted to the concave side.

[0012] Further, the conversion device further includes a bottom case. The lower bracket is disposed at the bottom inside the bottom case, and the upper bracket is disposed at the top inside the bottom case. The British standard button assembly, the American standard button assembly, and the European standard button assembly are disposed between the upper bracket and the lower bracket.

[0013] Further, a circuit board is inserted at a position near the middle inside the bottom case. A protective board is fixed on the top of the circuit board. The circuit board divides the inside of the bottom case and forms two areas. The British standard button assembly, the American standard button assembly, and the European standard button assembly are located in one of the areas.

[0014] Further, a plurality of first charging ports and second charging ports are opened on the outer surface of the bottom case. A plurality of charging interfaces are electrically connected to the circuit board at positions corresponding to the first charging ports and the second charging ports. The charging interfaces are disposed inside the first charging ports and the second charging ports. A plurality of sliding grooves are opened on the outer surface of the bottom case at positions corresponding to the British standard button assembly, the American standard button assembly, and the European standard button assembly.

[0015] Further, a top cover is provided on the top of the bottom case. The top cover covers the top of the bottom case. An insertion port is opened on the top of the top cover and corresponds to the electrode connection piece. A plurality of threaded holes are opened on the top of the top cover. Screws are threadedly connected inside the threaded holes, and the bottoms of the screws are vertically inserted into the upper bracket and the inside of the bottom case.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: Through the electrode connecting piece and the British standard button assembly, American standard button assembly and European standard button assembly connected to the electrode connecting piece, it is realized that the British standard button assembly, American standard button assembly and European standard button assembly can be combined into a whole according to their own structures, and when disassembly is required, it is convenient to disassemble without affecting the use. The structures of the British standard button assembly, American standard button assembly and European standard button assembly are different. During the assembly process, the British standard button assembly and American standard button assembly are assembled on the top of the lower bracket, and the American standard button assembly is arranged inside the British standard button assembly, saving space. The European standard button assembly is arranged on one side of the lower bracket to ensure that the three form a whole and can also ensure subsequent disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall three-dimensional exploded structure schematic diagram of the present utility model.

[0018] Figure 2 is the overall three-dimensional structure schematic diagram of the present utility model.

[0019] Figure 3 is the overall front structure schematic diagram of the present utility model.

[0020] Figure 4 is the three-dimensional structure schematic diagram of the conversion device of the present utility model.

[0021] Figure 5 is the exploded three-dimensional structure schematic diagram of the conversion device of the present utility model.

[0022] In the figure:

[0023] 1. Bottom shell; 101. First charging port; 102. Second charging port;

[0024] 2. Circuit board; 201. Protective plate;

[0025] 3. Charging interface;

[0026] 4. Top cover; 401. Socket; 402. Threaded hole;

[0027] 5. Lower bracket;

[0028] 6. Upper bracket; 601. Screw; 602. Electrode connecting piece;

[0029] 7. Conversion plug-in; 701. Spring;

[0030] 8. Movable cylinder;

[0031] 9. European standard circuit component; 901. European standard dial; 902. European standard plug;

[0032] 10. American standard circuit component; 1001. American standard dial; 1002. American standard plug;

[0033] 11. UK standard circuit components; 1101. UK standard paddles; 1102. UK standard plugs;

[0034] 12. Sliding grooves. Detailed implementation manners

[0035] Reference will now be made in detail to specific embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Although the present invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the present invention to the described embodiments. On the contrary, it is intended to cover modifications, variations, and equivalents included within the spirit and scope of the present invention as defined by the appended claims. It should be noted that the method steps described herein can be implemented by any functional block or functional arrangement, and any functional block or functional arrangement can be implemented as a physical entity or a logical entity, or a combination of both.

[0036] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0037] Note: The examples to be introduced next are only specific examples and do not limit the embodiments of the present invention to the following specific steps, numerical values, conditions, data, sequences, etc. Those skilled in the art can use the concept of the present invention to construct more embodiments not mentioned in this specification by reading this specification.

[0038] A conversion device, also known as a conversion plug, literally means converting one type of plug into another (such as a telephone power plug, a USB charging plug, a computer power plug, and generally the power plugs of various countries are interchangeable), converting the power plugs of different countries or the power plug of a certain country into the power plugs of another country or multiple countries. Since there are various different conversion plugs, when producing a conversion device, different conversion plugs need to be arranged in a housing to ensure more convenient use. However, the installation methods of multiple conversion plugs are usually fixed together and then arranged inside the housing, resulting in inconvenience when disassembling and assembling one of the conversion plugs.

[0039] To solve the problems existing in the above-mentioned general-purpose conversion device, a global general-purpose conversion device assembly structure proposed by the present invention is shown in Figure 1 、 Figure 2 、 Figure 4 and Figure 5, including a lower bracket 5, a US standard button assembly and a UK standard button assembly connected to the top of the lower bracket 5, and a European standard button assembly provided on one side of the lower bracket 5. The European standard button assembly is provided on one side of the UK standard button assembly, and the US standard button assembly is provided in the middle of the UK standard button assembly; multiple columns extend from the top of the lower bracket 5. The US standard button assembly and the UK standard button assembly are sleeved outside the columns. The top of the UK standard button assembly, the US standard button assembly and the European standard button assembly are clamped with an upper bracket 6. An electrode connecting piece 602 is installed inside the upper bracket 6, and the electrode connecting piece 602 is electrically connected to the UK standard button assembly, the US standard button assembly and the European standard button assembly.

[0040] As Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, the lower bracket 5 is mainly composed of a bottom plate and multiple columns. The multiple columns are fixedly arranged on the top of the bottom plate, and the multiple columns are uneven in height;

[0041] The US standard button assembly and the UK standard button assembly are provided on the top of the bottom plate and sleeved on the outer surface of the columns. The columns support the US standard button assembly and the UK standard button assembly, making the US standard button assembly and the UK standard button assembly float, ensuring that the US standard button assembly and the UK standard button assembly can be pulled up and down subsequently. The European standard button assembly is provided on one side of the lower bracket 5. One side of the lower bracket 5 is recessed and adapted to the European standard button assembly;

[0042] An upper bracket 6 is provided between the tops of the UK standard button assembly, the US standard button assembly and the European standard button assembly. Their positional relationship is that the lower bracket 5 is at the bottom, the upper bracket 6 is at the top, the UK standard button assembly, the US standard button assembly and the European standard button assembly are provided between the upper bracket 6 and the lower bracket 5, and an electrode connecting piece 602 is installed inside the upper bracket 6 to ensure the electrical connection between the UK standard button assembly, the US standard button assembly and the European standard button assembly and the upper bracket 6. After the UK standard button assembly, the US standard button assembly and the European standard button assembly are assembled into a whole, it is convenient to disassemble and can work normally.

[0043] Please refer to Figure 2 and Figure 4 , the top of the upper bracket 6 is of a concave structure. A conversion plug-in 7 is clamped inside the recess of the upper bracket 6. The conversion plug-in 7 corresponds to the electrode connecting piece 602. A spring 701 is provided inside the recess of the upper bracket 6. The two ends of the spring 701 respectively abut against the conversion plug-in 7 and the upper bracket 6.

[0044] As Figure 2 and Figure 4As shown, the middle part of the top of the upper bracket 6 is recessed downward, and a conversion plug-in 7 is clamped in the recess, and the conversion plug-in 7 is electrically connected to the motor connecting piece. One side of the conversion plug-in 7 is pressed against a spring 701, and the other end of the spring 701 is pressed against the upper bracket 6, ensuring that the conversion plug-in 7 can be easily installed and disassembled.

[0045] See also Figure 1 , Figure 2 , Figure 4 and Figure 5 The US standard key assembly includes a US standard circuit component 10 mounted on the lower bracket 5, a US standard plug 1002 electrically connected to the bottom of the US standard circuit component 10, and a US standard paddle 1001 fixed to one side of the US standard circuit component 10. The UK standard key assembly includes a UK standard circuit component 11 mounted on the lower bracket 5, a UK standard plug 1102 electrically connected to the bottom of the UK standard circuit component 11, and a UK standard paddle 1101 fixed to one side of the UK standard circuit component 11. The structure of the UK standard circuit component 11 It has a horizontal U-shaped structure, with the British standard circuit component 11 wrapped around the outside of the American standard circuit component 10, and the European standard button assembly includes a movable cylinder 8 arranged on one side of the lower bracket 5, a European standard circuit component 9 sliding inside the movable cylinder 8, a European standard plug 902 electrically connected to the bottom of the European standard circuit component 9, and a European standard paddle 901 fixed to one side of the European standard circuit component 9. One side of the lower bracket 5 has a concave structure, and one side of the movable cylinder 8 is attached to one side of the lower bracket 5 and is compatible with the concave side.

[0046] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the US standard key assembly is mainly composed of a US standard circuit component 10, a US standard plug 1002 electrically connected to the bottom of the US standard circuit component 10, and a US standard paddle 1001 fixed to one side of the US standard circuit component 10. An opening adapted to the column is provided at the edge of the US standard circuit component 10, so as to ensure that the US standard circuit component 10 can be assembled in the air on the top of the lower bracket 5 and sleeved on the outer surface of the column. The US standard circuit component 10 is in a long strip shape as a whole;

[0047] The British standard key set mainly consists of a British standard circuit component 11 sleeved on the lower bracket 5, a British standard plug 1102 electrically connected to the bottom of the British standard circuit component 11, and a British standard paddle 1101 fixed to one side of the British standard circuit component 11. The edge of the British standard circuit component 11 is also provided with a plurality of openings, and is sleeved on the column through the openings to ensure that it can slide up and down. The structure of the British standard circuit component 11 is a horizontal U-shaped structure, which ensures that the British standard circuit component 11 can be wrapped around the outside of the American standard circuit component 10, saving space and facilitating assembly.

[0048] The European standard button assembly mainly consists of a movable cylinder 8 provided on one side of the lower bracket 5, a European standard circuit component 9 sliding inside the movable cylinder 8, a European standard plug 902 electrically connected to the bottom of the European standard circuit component 9, and a European standard paddle 901 fixed on one side of the European standard circuit component 9. The movable cylinder 8 is provided on one side of the lower bracket 5 and consists of two parts, namely the sleeve at the bottom and the slide rail plate at the top of the sleeve. The bottom of the European standard circuit component 9 moves inside the movable cylinder 8, and there is a slot on one side for sliding up and down on the slide rail plate. The lower bracket 5 fits against one side of the movable cylinder 8 in a concave structure, and one side of the movable cylinder 8 fits against one side of the lower bracket 5 and is adapted to the concave side.

[0049] Please refer to Figure 1 、 Figure 2 and Figure 3 , the conversion device further includes a bottom case 1, the lower bracket 5 is provided at the bottom inside the bottom case 1, the upper bracket 6 is provided at the top inside the bottom case 1, and the British standard button assembly, the US standard button assembly and the European standard button assembly are provided between the upper bracket 6 and the lower bracket 5.

[0050] Please continue to refer to Figure 1 、 Figure 2 and Figure 3 , a circuit board 2 is inserted at a position near the middle inside the bottom case 1. A protective plate 201 is fixed on the top of the circuit board 2. The circuit board 2 divides the inside of the bottom case 1 into two areas, and the British standard button assembly, the US standard button assembly and the European standard button assembly are located in one of the areas.

[0051] As Figure 1 、 Figure 2 and Figure 3 shown, the circuit board 2 is provided at the middle position inside the bottom case 1, and one side of the circuit board 2 fits against the movable cylinder 8. A protective plate 201 is fixed on the top of the circuit board 2, presenting an inverted L-shaped structure as a whole, and the circuit board 2 can be electrically connected to the electrode connection piece 602.

[0052] Please continue to refer to Figure 1 、 Figure 2 and Figure 3 , a plurality of first charging ports 101 and second charging ports 102 are provided on the outer surface of the bottom case 1. A plurality of charging interfaces 3 are electrically connected to the positions corresponding to the first charging ports 101 and the second charging ports 102 on one side of the circuit board 2. The charging interfaces 3 are provided inside the first charging ports 101 and the second charging ports 102. A plurality of sliding grooves 12 are provided on the outer surface of the bottom case 1 corresponding to the positions of the British standard button assembly, the US standard button assembly and the European standard button assembly.

[0053] As Figure 1 、 Figure 2 and Figure 3As shown, multiple first charging ports 101 and second charging ports 102 with different interfaces are provided on the outside of the bottom case 1. One side of the circuit board 2 is electrically connected with multiple charging interfaces 3. One ends of the multiple charging interfaces 3 are respectively located inside the first charging port 101 and the second charging port 102 to ensure the normal use of the user. Moreover, multiple sliding grooves 12 are provided on the outside of the bottom case 1 corresponding to the positions of the UK specification button assembly, US specification button assembly, and EU specification button assembly. One ends of the EU specification dial 901, US specification dial 1001, and UK specification dial 1101 extend from the sliding grooves 12 to the outside of the bottom case 1 to ensure that the EU specification circuit component 9, US specification circuit component 10, and UK specification circuit component 11 can be pulled by the EU specification dial 901, US specification dial 1001, and UK specification dial 1101 to move up and down.

[0054] Please refer to Figure 1 , a top cover 4 is provided on the top of the bottom case 1. The top cover 4 covers the top of the bottom case 1. An insertion port 401 is provided on the top of the top cover 4, which corresponds to the electrode connecting piece 602. Multiple threaded holes 402 are provided on the top of the top cover 4. Screws 601 are threadedly connected inside the threaded holes 402. The bottoms of the screws 601 are vertically inserted into the upper bracket 6 and the inside of the bottom case 1.

[0055] As Figure 1 shown, a top cover 4 is sleeved on the top of the bottom case 1. The top cover 4 covers the top of the bottom case 1 and forms a complete enclosed box-shaped structure. An insertion port 401 is provided on the top of the top cover 4 and corresponds to the conversion plug-in 7, which can ensure that the plug is inserted into the conversion plug-in 7 for use. Bolts are threadedly connected inside the threaded holes 402 provided on the top of the top cover 4, and the top cover 4 can be fixed on the bottom case 1 through the screws 601.

[0056] When using the present utility model, through the different structures of the UK specification button assembly, US specification button assembly, and EU specification button assembly, and in cooperation with the upper bracket 6 and the lower bracket 5, they are assembled into a whole, which is convenient for assembly, saves space, and is also convenient for disassembly when subsequent disassembly is required.

[0057] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] It should be noted that in the present utility model, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of another identical element in the process, method, article or device comprising the said element.

[0059] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features of the present utility model described herein.

Claims

1. A universal conversion device assembly structure, comprising a lower bracket (5), a US standard key assembly and a British standard key assembly connected to the top of the lower bracket (5), and a European standard key assembly arranged on one side of the lower bracket (5), characterized in that: The European standard button assembly is arranged on one side of the British standard button assembly, and the American standard button assembly is arranged in the middle of the British standard button assembly; A plurality of columns extend from the top of the lower bracket (5); the US standard button assembly and the UK standard button assembly are sleeved on the outside of the columns; the tops of the UK standard button assembly, the US standard button assembly and the European standard button assembly are clamped with an upper bracket (6); an electrode connecting piece (602) is installed inside the upper bracket (6); and the electrode connecting piece (602) is electrically connected to the UK standard button assembly, the US standard button assembly and the European standard button assembly.

2. The global universal conversion equipment assembly structure according to claim 1, characterized in that: The top of the upper bracket (6) is in a concave structure, and a conversion plug-in (7) is clamped inside the concave portion of the upper bracket (6), and the conversion plug-in (7) corresponds to the electrode connecting piece (602).

3. The global universal conversion equipment assembly structure according to claim 2, characterized in that: A spring (701) is provided inside the recess of the upper bracket (6), and two ends of the spring (701) respectively abut against the conversion plug-in (7) and the upper bracket (6).

4. The global universal conversion equipment assembly structure according to claim 1, characterized in that: The US standard key assembly comprises a US standard circuit component (10) sleeved on the lower bracket (5), a US standard plug (1002) electrically connected to the bottom of the US standard circuit component (10), and a US standard paddle (1001) fixedly mounted on one side of the US standard circuit component (10).

5. The global universal conversion equipment assembly structure according to claim 4, characterized in that: The British standard key assembly comprises a British standard circuit component (11) sleeved on the lower bracket (5), a British standard plug (1102) electrically connected to the bottom of the British standard circuit component (11), and a British standard paddle (1101) fixed to one side of the British standard circuit component (11); the British standard circuit component (11) has a horizontal U-shaped structure, and the British standard circuit component (11) is wrapped around the outside of the American standard circuit component (10).

6. The global universal conversion equipment assembly structure according to claim 1, characterized in that: The European standard key assembly comprises a movable cylinder (8) arranged on one side of the lower bracket (5), a European standard circuit component (9) sliding inside the movable cylinder (8), a European standard plug (902) electrically connected to the bottom of the European standard circuit component (9), and a European standard paddle (901) fixedly arranged on one side of the European standard circuit component (9), one side of the lower bracket (5) is in a concave shape, one side of the movable cylinder (8) is attached to one side of the lower bracket (5), and is adapted to the concave side.

7. The global universal conversion equipment assembly structure according to claim 1, characterized in that: The conversion device further comprises a bottom shell (1), the lower bracket (5) being arranged at the bottom of the bottom shell (1), the upper bracket (6) being arranged at the top of the bottom shell (1), and the British standard key assembly, the American standard key assembly and the European standard key assembly being arranged between the upper bracket (6) and the lower bracket (5).

8. The global universal conversion equipment assembly structure according to claim 7, characterized in that: A circuit board (2) is plugged into a position near the middle of the bottom shell (1), a protective plate (201) is fixedly provided on the top of the circuit board (2), and the circuit board (2) divides the inside of the bottom shell (1) to form two areas, and the British standard button assembly, the American standard button assembly and the European standard button assembly are located in one of the areas.

9. The global universal conversion equipment assembly structure according to claim 8, characterized in that: The outer surface of the bottom shell (1) is provided with a plurality of first charging ports (101) and a second charging port (102); one side of the circuit board (2) is electrically connected to a plurality of charging interfaces (3) at positions corresponding to the first charging ports (101) and the second charging ports (102); the charging interfaces (3) are arranged inside the first charging ports (101) and the second charging ports (102); and the outer surface of the bottom shell (1) is provided with a plurality of sliding grooves (12) at positions corresponding to the British standard button assembly, the American standard button assembly and the European standard button assembly.

10. The global universal conversion equipment assembly structure according to claim 7, characterized in that: A top cover (4) is provided on the top of the bottom shell (1), the top cover (4) covers the top of the bottom shell (1), a socket (401) is provided on the top of the top cover (4), the socket (401) corresponds to the electrode connecting piece (602), a plurality of threaded holes (402) are provided on the top of the top cover (4), the internal threads of the threaded holes (402) are connected with screws (601), and the bottom of the screws (601) is vertically inserted into the upper bracket (6) and the bottom of the bottom shell (1).

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