Battery shell and battery

Abstract

The utility model belongs to the technical field of batteries, and particularly relates to a battery shell and a battery. The battery shell comprises a shell main body, the shell main body is suitable for being matched with the side wall of a battery jar of an electronic device in a limiting mode, a protruding structure protruding towards the outer side of the shell main body is arranged on the shell main body, and the protruding structure is suitable for being detachably connected to the electronic device. According to the electronic device, the battery can be detachably fixed in the battery groove without being fixed on the electronic device through a hanging table or a screw in the prior art, the structure is simple, and the battery is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and particularly relates to a battery case and a battery. Background Art

[0002] Steel shell batteries are increasingly widely used in electronic devices due to their good characteristics such as large stiffness, pressure resistance and deformation resistance.

[0003] A steel shell battery includes a metal case and an electrode assembly. One pole column of the electrode assembly is electrically connected to the metal case so that the entire metal case serves as one pole of the steel shell battery. The other pole column of the electrode assembly needs to extend from the surface of the metal case to the outside of the metal case, that is, the other pole column of the electrode assembly serves as the other pole of the steel shell battery.

[0004] When installing a steel shell battery, the metal case is usually installed in the battery slot of the electronic device through a hanging platform or screws, resulting in troublesome disassembly and assembly of the steel shell battery. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: aiming at the problem that the existing steel shell battery is installed in the battery slot of the electronic device through a hanging platform or screws, resulting in troublesome disassembly and assembly of the steel shell battery, a battery case and a battery are provided.

[0006] To solve the above technical problem, on the one hand, an embodiment of the utility model provides a battery case, including a case body, the case body is adapted to be in limit fit with the side wall of the battery slot of the electronic device, and a convex structure protruding outward from the case body is arranged on the case body, and the convex structure is adapted to be detachably connected to the electronic device.

[0007] Optionally, the convex structure is adapted to be inserted into the electronic device.

[0008] Optionally, the convex structure is a fixing nail, and the fixing nail is fixed on the case body.

[0009] Optionally, the convex structure includes a liquid injection column and a liquid injection cover. The inner end of the liquid injection column is connected to the case body, the liquid injection column is used to inject electrolyte into the case body, and the liquid injection cover seals the outer end of the liquid injection column.

[0010] Optionally, the convex structure is a convex platform integrally formed with the case body.

[0011] Optionally, the case body is a cube; the convex structure is arranged on one side in the length direction of the case body, or the convex structure is arranged on one side in the width direction of the case body.

[0012] Optionally, a plurality of convex structures are arranged, and the plurality of convex structures are arranged on the same side of the case body.

[0013] Optionally, there are two protruding structures, which are respectively a first protruding structure and a second protruding structure, and the first protruding structure and the second protruding structure are arranged at opposite ends on the same side of the shell body.

[0014] Optionally, the first protruding structure is a fixing nail, and the fixing nail is fixed on the shell body; the second protruding structure includes a liquid injection column and a liquid injection cover, the inner end of the liquid injection column is connected to the circumferential side surface, the liquid injection column is used for injecting electrolyte into the shell body, and the liquid injection cover seals the outer end of the liquid injection column;

[0015] Or,

[0016] both the first protruding structure and the second protruding structure are fixing nails, and the fixing nails are fixed on the shell body;

[0017] Or,

[0018] the first protruding structure is a fixing nail, and the fixing nail is fixed on the shell body; the second protruding structure is a convex platform integrally formed with the shell body;

[0019] Or,

[0020] both the first protruding structure and the second protruding structure are convex platforms integrally formed with the shell body;

[0021] Or,

[0022] the first protruding structure is a convex platform integrally formed with the shell body, and the second protruding structure includes a liquid injection column and a liquid injection cover, the inner end of the liquid injection column is connected to the shell body, the liquid injection column is used for injecting electrolyte into the shell body, and the liquid injection cover seals the outer end of the liquid injection column.

[0023] Optionally, the shell body has a first surface, a second surface and a circumferential side surface, the first surface and the second surface are opposite in the thickness direction of the shell body, the circumferential side surface connects the first surface and the second surface, the circumferential side surface is adapted to be in limit fit with the side wall of the battery slot of the electronic device, and the protruding structure is arranged on the circumferential side surface.

[0024] Optionally, the first surface is adapted to press on the bottom wall of the battery slot, and in the thickness direction of the shell body, the protruding structure is closer to the first surface.

[0025] Optionally, it further includes a hand-held platform, the hand-held platform is fixed on the side of the shell body opposite to the protruding structure, a hand-held groove is arranged on the hand-held platform, the hand-held groove opens towards the side away from the shell body, and the hand-held groove is for the hand to be inserted.

[0026] Optionally, the depth at each position within the handle groove in the relative direction of the handle groove and the convex structure is equal.

[0027] Optionally, the handle groove includes two tapered grooves, and the two tapered grooves are symmetrically distributed in the thickness direction of the housing body. The depth of the tapered groove gradually increases from the center of the housing body towards the outside in the thickness direction of the housing body.

[0028] Optionally, the handle groove is strip-shaped and extends along the extending direction of the handle platform.

[0029] In the battery housing of the present utility model, when the battery is inserted into the battery slot on the electronic device, the housing body is in limit fit with the side wall of the battery slot, and the convex structure on the housing body is detachably connected to the electronic device, thereby detachably fixing the battery in the battery slot. There is no need to fix the battery on the electronic device through a hanging platform or screws as in the prior art, and the structure is simple, facilitating the disassembly and assembly of the battery.

[0030] On the other hand, an embodiment of the present utility model provides a battery, including the above-mentioned battery housing and an electrode assembly encapsulated in the battery housing.

[0031] Optionally, one end of the electrode assembly extends out of the battery housing and protrudes from the housing body, the convex structure is located on the same side where the electrode assembly extends out of the housing body, and the height of the convex structure is less than the height of the electrode assembly protruding from the housing body. Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of the first structure of the battery provided by an embodiment of the present utility model;

[0033] Figure 2 is Figure 1 the top view of

[0034] Figure 3 is Figure 1 the side view of

[0035] Figure 4 is a schematic structural diagram of the second structure of the battery provided by an embodiment of the present utility model;

[0036] Figure 5 is Figure 4 the top view of

[0037] Figure 6 is a schematic structural diagram of the third structure of the battery provided by an embodiment of the present utility model;

[0038] Figure 7 is Figure 6 the top view of

[0039] Figure 8 It is a schematic structural diagram of the fourth structure of the battery provided by an embodiment of the present utility model;

[0040] Figure 9 is Figure 8 the top view of;

[0041] Figure 10 It is a schematic structural diagram of the fifth structure of the battery provided by an embodiment of the present utility model;

[0042] Figure 11 is Figure 1 the bottom view of;

[0043] Figure 12 is Figure 11 the cross-sectional view of the buckle platform in;

[0044] Figure 13 is Figure 11 the schematic structural diagram of another style of buckle groove in;

[0045] Figure 14 is Figure 13 the cross-sectional view of the middle buckle platform of.

[0046] The reference numerals in the specification are as follows:

[0047] 1. Shell main body; 11. Peripheral side surface; 12. First surface; 13. Second surface; 2. Electrode assembly; 3. Fixing nail; 4. Liquid injection cover; 5. Boss; 6. Buckle platform; 61. Buckle groove. Specific embodiments

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0049] As Figures 1 to 3 shown, an embodiment of the present utility model provides a battery, which includes a battery housing and an electrode assembly 2 encapsulated in the battery housing. One pole column of the electrode assembly 2 is electrically connected to the battery housing so that the entire battery housing serves as one pole of the battery, and the other pole column of the electrode assembly 2 extends out of the battery housing from the surface of the battery housing, and the other pole column of the electrode assembly 2 serves as the other pole of the battery.

[0050] The battery housing includes a shell main body 1. The shell main body 1 is adapted to be in limit fit with the side wall of the battery slot of the electronic device. A convex structure protruding outward from the shell main body 1 is provided on the shell main body 1, and the convex structure is adapted to be detachably connected to the electronic device.

[0051] Specifically, a connection structure that cooperates with the convex structure is provided on the side wall of the limiting groove of the electronic device, so that after the battery housing is inserted into the limiting groove of the electronic device, the convex structure is detachably connected to the connection structure, and the battery housing is in limiting cooperation with the limiting groove, thereby detachably fixing the battery housing on the electronic device. There is no need for the battery in the prior art to be fixed on the electronic device through a hanging platform or screws, and the structure is simple, which is convenient for disassembling and assembling the battery. The detachable connection methods that the convex structure can adopt include but are not limited to snap connection, plug connection, etc.

[0052] In the battery of the present utility model, when the battery is inserted into the battery slot on the electronic device, the housing main body 1 is in limiting cooperation with the side wall of the battery slot, and the convex structure on the housing main body 1 is detachably connected to the electronic device, so that the battery can be detachably fixed in the battery slot. There is no need for the battery in the prior art to be fixed on the electronic device through a hanging platform or screws, and the structure is simple, which is convenient for disassembling and assembling the battery.

[0053] In an embodiment, the convex structure is adapted to be inserted into the electronic device. Correspondingly, a groove for inserting the convex structure is provided on the side wall of the limiting groove of the electronic device. When installing the battery, the convex structure is aligned and inserted into the groove of the electronic device, the battery is inserted into the battery slot, the housing main body 1 is in limiting cooperation with the side wall of the battery slot, and the plug-in cooperation between the convex structure and the groove enables the battery to be detachably fixed in the battery slot. The plug-in structure has a simple structure, and there is no connecting force between the convex structure and the groove on the limiting groove, which is convenient for the convex structure to be disengaged from the groove, so as to facilitate the disassembly of the battery housing.

[0054] In an embodiment, one end of the electrode assembly 2 extends out of the battery housing and protrudes from the housing main body 1. The convex structure is located on the same side as the electrode assembly 2 extending out of the housing main body 1, and the height of the convex structure is less than the height of the electrode assembly 2 protruding from the housing main body 1, so as to avoid increasing the space occupied by the battery due to the setting of the convex structure, and to improve the capacity rate while realizing the detachable fixation of the battery on the electronic device.

[0055] In an embodiment, as Figure 1 and Figure 2 shown, the convex structure is a fixing nail 3, and the fixing nail 3 is fixed on the housing main body 1. The fixing nail 3 can be riveted on the housing main body 1 or welded on the housing main body 1.

[0056] It should be noted that the fixing nail 3 is a coreless rivet and does not have electrical conductivity, so as to avoid becoming one pole of the battery after being connected to the housing main body 1.

[0057] Since the core rivet is a pole column commonly used in the battery production technology field, therefore, the coreless rivet can be obtained by modifying the existing part of the core rivet, and then the coreless rivet is fixed on the housing main body 1 to form a convex structure that is in plug-in cooperation with the battery device. The cost of the fixing nail 3 is relatively low, which can reduce the processing cost of the battery housing.

[0058] In one embodiment, the fixing nail 3 is about 5 in length and 2.5 in width, and about 0.5 - 1.0 in height, and can be adjusted according to the battery size.

[0059] In one embodiment, as Figure 1 and Figure 2 shown, the convex structure includes a liquid injection column and a liquid injection cover 4. The inner end of the liquid injection column is connected to the shell body 1. The liquid injection column is used to inject electrolyte into the shell body 1, and the liquid injection cover 4 seals the outer end of the liquid injection column.

[0060] Among them, the liquid injection column and the liquid injection cover 4 are structures on existing batteries. The function of the liquid injection column on existing batteries is only to inject electrolyte into the shell body 1. However, in the present utility model, by reasonably arranging the liquid injection column and the liquid injection cover 4 on the corresponding side of the shell body 1, a convex structure protruding outward from the shell body 1 can be formed while realizing the liquid injection function, so as to fix the battery and reduce the processing cost of the battery shell.

[0061] In one embodiment, the liquid injection cover 4 is about φ3 in size and about 0.5 - 1.0 in height, and can be adjusted according to the battery size.

[0062] In one embodiment, as Figure 4 and Figure 5 shown, the convex structure is a boss 5 integrally formed with the shell body 1.

[0063] In one embodiment, the size of the boss 5 is 3.5 * 3.5 mm.

[0064] In one embodiment, the shell body 1 is a cube; the convex structure is arranged on one side in the length direction of the shell body 1, or the convex structure is arranged on one side in the width direction of the shell body 1.

[0065] In one embodiment, the convex structure is arranged on one side in the length direction of the shell body 1. When disassembling the battery, the disassembling person can apply force from the other side in the length direction of the shell body 1 to disassemble, so that the battery rotates with the side where the convex structure is located as the rotation side. Compared with the convex structure arranged on one side in the width direction of the shell body 1, the convex structure arranged on one side in the length direction of the shell body 1 has a longer rotation moment and a smaller force for disassembling the battery, which is convenient for disassembling the battery.

[0066] In one embodiment, the convex structure is arranged on the top side in the length direction of the shell body 1. The so-called top side means that this side is closer to the center of the electronic device when the battery is installed on the electronic device. Correspondingly, the groove on the electronic device that is inserted and matched with the convex structure is closer to the center of the electronic device. When the installer assembles the battery on the electronic device, it is convenient to see the groove on the electronic device, so as to facilitate the installer to align the groove and insert the convex structure.

[0067] In one embodiment, a plurality of raised structures are provided, and the plurality of raised structures are arranged on the same side of the housing main body 1. The more the raised structures are provided, the more stress points there are on the housing main body 1, so that each position on the same side of the housing main body 1 is stressed, avoiding the situation that the housing main body 1 is not firmly fixed when the stress is concentrated at one place.

[0068] In one embodiment, two raised structures are provided. The two raised structures are respectively a first raised structure and a second raised structure. The first raised structure and the second raised structure are arranged at opposite ends on the same side of the housing main body 1. The battery is fixed to the electronic device through the two raised structures. The number of the raised structures is small, reducing the number of times the installer inserts the raised structures into the corresponding grooves when assembling the battery on the electronic device, and reducing the assembly difficulty.

[0069] Moreover, the first raised structure and the second raised structure are arranged at opposite ends on the same side of the housing main body 1, and the opposite ends of the housing main body 1 are stressed, making the housing main body 1 fixed relatively firmly.

[0070] In one embodiment, as Figure 1 and Figure 2 shown, the first structure of the battery provided with two raised structures is provided, wherein the first raised structure is a fixing nail 3, and the fixing nail 3 is fixed on the housing main body 1; the second raised structure includes a liquid injection column and a liquid injection cap 4. The inner end of the liquid injection column is connected to the housing main body 1. The liquid injection column is used for injecting electrolyte into the housing main body 1, and the liquid injection cap 4 seals the outer end of the liquid injection column.

[0071] In one embodiment, the first raised structure and the second raised structure have the same height, and the heights of the first raised structure and the second raised structure are both smaller than the height of the electrode assembly 2 protruding from the housing main body 1.

[0072] In other embodiments, as Figure 4 and Figure 5 shown, the second structure of the battery provided with two raised structures is provided, wherein the first raised structure may be a fixing nail 3, and the fixing nail 3 is fixed on the housing main body 1; the second raised structure may be a boss 5 integrally formed with the housing main body 1.

[0073] In other embodiments, as Figure 6 and Figure 7 shown, the third structure of the battery provided with two raised structures is provided, wherein the first raised structure may be a boss 5 integrally formed with the housing main body 1, and the second raised structure may include a liquid injection column and a liquid injection cap 4. The inner end of the liquid injection column is connected to the housing main body 1. The liquid injection column is used for injecting electrolyte into the housing main body 1, and the liquid injection cap 4 seals the outer end of the liquid injection column.

[0074] In other embodiments, asFigure 8 and Figure 9 As shown in Figure 9 , a fourth structure of a battery provided with two protruding structures is provided. Among them, the first protruding structure and the second protruding structure can both be bosses 5 integrally formed with the housing main body 1.

[0075] In one embodiment, the housing main body 1 has a first surface 12, a second surface 13 and a peripheral side surface 11. The first surface 12 and the second surface 13 are opposite in the thickness direction of the housing main body 1. The peripheral side surface 11 connects the first surface 12 and the second surface 13. The peripheral side surface 11 is adapted to be in limiting cooperation with the side wall of the battery slot of the electronic device, and the protruding structure is arranged on the peripheral side surface 11.

[0076] In one embodiment, the first surface 12 is adapted to contact the bottom wall of the battery slot. In the thickness direction of the housing main body 1, the protruding structure is closer to the first surface 12, so that there is a larger space between the protruding structure and the second surface 13, which is beneficial to operating the battery through this space when the battery is assembled with the electronic device.

[0077] In other embodiments, as shown in Figure 10 Figure 10 a fifth structure of a battery provided with two protruding structures is provided. Different from the fourth structure, the boss 5 is square, and one side surface of the boss 5 is aligned with the first surface 12 to form a surface.

[0078] In one embodiment, as shown in Figure 11 Figure 11 a handle platform 6 is further included. The handle platform 6 is fixed on one side of the housing main body 1 opposite to the protruding structure. A handle groove 61 is arranged on the handle platform 6. The handle groove 61 opens toward the side away from the housing main body 1. The handle groove 61 is for the hand to be inserted, so as to facilitate putting the battery into the battery slot of the electronic device and also facilitate taking out the battery.

[0079] In one embodiment, as shown in Figure 12 Figure 12 the depths at each position in the handle groove 61 in the relative direction of the handle groove 61 and the protruding structure are equal.

[0080] In one embodiment, the depth of the handle groove 61 is about 0.3 mm, and it can also be made 1 mm according to the design of the electronic device.

[0081] In one embodiment, the handle groove 61 is strip-shaped, and the handle groove 61 extends along the extending direction of the peripheral side surface 11 where it is located.

[0082] In other embodiments, as shown in Figure 13 Figure 13 and Figure 14 the handle groove 61 includes two tapered grooves. The two tapered grooves are symmetrically distributed in the thickness direction of the housing main body 1. The depth of the tapered groove gradually increases from the center of the housing main body 1 to the outside in the thickness direction of the housing main body 1.

[0083] Among them, the length of the gradient groove can be 5-20 mm, and the size is defined according to the width of the battery. The depth is about 0.3 mm and is designed according to the cooperation of the electronic device, or it can also be made 1 mm.

[0084] In one embodiment, the handle groove 61 is strip-shaped and extends along the extending direction of the handle platform 6.

[0085] In other embodiments, the handle groove 61 can be short strip-shaped, and there are multiple handle grooves 61, and the multiple handle grooves 61 are spaced apart along the extending direction of the side surface where the housing main body 1 is located.

[0086] In other embodiments, the first convex structure and the second convex structure can both be fixing pins 3, and the two fixing pins 3 are symmetrically fixed on the same side of the circumferential side surface 11.

[0087] In other embodiments, only one convex structure can be provided, and the convex structure is arranged at the middle position on one side of the housing main body 1.

[0088] In other embodiments, the housing main body 1 can be a circular housing, and the two end faces of the circular housing respectively form the first surface 12 and the second surface 13, and the circumferential side surface 11 of the circular housing forms the circumferential side surface 11 of the housing main body 1.

[0089] In other embodiments, the convex structure can be arranged at the middle position between the first surface 12 and the second surface 13.

[0090] In other embodiments, three or more convex structures can be provided, and all convex structures can be any combination of the convex platform 5, the fixing pin 3, the liquid injection cover 4 and the liquid injection column.

[0091] In addition, an embodiment of the present utility model provides a battery housing, and its structure is the same as that of the battery housing in any of the above embodiments, and will not be described in detail here.

[0092] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A battery housing, characterized in that: The invention comprises a shell body (1), wherein the shell body (1) is suitable for being limitedly matched with the side wall of a battery slot of an electronic device, and the shell body (1) is provided with a protruding structure protruding toward the outside of the shell body (1), and the protruding structure is suitable for being detachably connected to the electronic device.

2. The battery housing according to claim 1, characterized in that: The protruding structure is suitable for being inserted into an electronic device.

3. The battery housing according to claim 2, characterized in that: The protruding structure is a fixing nail (3), and the fixing nail (3) is fixed on the shell body (1).

4. The battery casing according to claim 2, characterized in that: The protruding structure comprises an injection column and an injection cap (4), wherein the inner end of the injection column is connected to the shell body (1), the injection column is used to inject electrolyte into the shell body (1), and the injection cap (4) is sealed on the outer end of the injection column.

5. The battery casing according to claim 2, characterized in that: The protruding structure is a boss (5) formed integrally with the shell body (1).

6. The battery case according to claim 1, characterized in that: The shell body (1) is a cube, and the protruding structure is arranged on one side of the length direction of the shell body (1), or the protruding structure is arranged on one side of the width direction of the shell body (1).

7. The battery casing according to claim 6, characterized in that: There are multiple protrusion structures, and the multiple protrusion structures are arranged on the same side of the shell body (1).

8. The battery casing according to claim 7, characterized in that: Two protruding structures are provided, and the two protruding structures are respectively a first protruding structure and a second protruding structure. The first protruding structure and the second protruding structure are provided at opposite ends of the same side of the shell body (1).

9. The battery casing according to claim 8, characterized in that: The first protruding structure is a fixing nail (3), and the fixing nail (3) is fixed on the shell body (1); the second protruding structure comprises a liquid injection column and a liquid injection cover (4), the inner end of the liquid injection column is connected to the shell body (1), the liquid injection column is used to inject electrolyte into the shell body (1), and the liquid injection cover (4) is sealed on the outer end of the liquid injection column; or, The first protruding structure is a fixing nail (3), and the fixing nail (3) is fixed on the shell body (1); the second protruding structure is a boss (5) formed integrally with the shell body (1); or, The first protruding structure and the second protruding structure are both bosses (5) integrally formed with the shell body (1); or, The first protruding structure is a boss (5) integrally formed with the shell body (1); the second protruding structure comprises a liquid injection column and a liquid injection cap (4); the inner end of the liquid injection column is connected to the shell body (1); the liquid injection column is used to inject electrolyte into the shell body (1); and the liquid injection cap (4) is capped on the outer end of the liquid injection column; or, The first protruding structure and the second protruding structure are both fixing nails (3), and the fixing nails (3) are fixed on the shell body (1).

10. The battery housing according to claim 1, characterized in that: The shell body (1) comprises a first surface (12), a second surface (13) and a peripheral side surface (11); the first surface (12) and the second surface (13) are opposite to each other in the thickness direction of the shell body (1); the peripheral side surface (11) connects the first surface (12) and the second surface (13); the peripheral side surface (11) is suitable for being limitedly matched with the side wall of a battery slot of an electronic device; and the protruding structure is arranged on the peripheral side surface (11).

11. The battery housing according to claim 10, characterized in that: The first surface (12) is suitable for pressing on the bottom wall of the battery container, and in the thickness direction of the shell body (1), the protruding structure is closer to the first surface (12).

12. The battery housing according to any one of claims 1 to 11, characterized in that: It also comprises a hand buckle platform (6), the hand buckle platform (6) being fixed on a side of the shell body (1) opposite to the protruding structure, the hand buckle platform (6) being provided with a hand buckle groove (61), the hand buckle groove (61) being open toward a side facing away from the shell body (1), and the hand buckle groove (61) being provided for buckling a hand.

13. The battery casing according to claim 12, characterized in that: The depths of various locations in the hand-gripping groove (61) in the relative directions between the hand-gripping groove (61) and the protruding structure are equal.

14. The battery casing according to claim 12, characterized in that: The hand grip groove (61) comprises two gradient grooves, the two gradient grooves are symmetrically distributed in the thickness direction of the shell body (1), and the depth of the gradient groove gradually increases from the center of the shell body (1) to the outside in the thickness direction of the shell body (1).

15. The battery housing according to claim 12, characterized in that: The hand-gripping groove (61) is in the shape of an elongated strip, and the hand-gripping groove (61) extends along the extending direction of the hand-gripping platform (6).

16. A battery, characterized in that: The invention comprises a battery casing as claimed in any one of claims 1 to 15 and an electrode assembly (2) encapsulated in the battery casing.

17. The battery according to claim 16, characterized in that One end of the electrode assembly (2) extends outward from the shell body (1), the protruding structure is located on the side of the electrode assembly (2) extending out of the shell body (1), and the height of the protruding structure is less than the height of the electrode assembly (2) protruding from the shell body (1).

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