TWM660095U - Detachable structure - Google Patents

Abstract

The detachable structure is configured to install at a housing. The detachable structure including a base, a lower cover and an upper cover is provided. The base is disposed in the housing and has a receiving groove, a bottom surface and an outer magnet set, and the outer magnet set is attached to the bottom surface. The lower cover is rotatably disposed in the receiving groove and has a lower magnet set. The upper cover is rotatably disposed on the lower cover and has an upper magnet set. When the detachable structure is connected into one body, the outer magnet group and the lower magnet group are attracted each other, and the lower magnet group and the upper magnet group are attracted each other. When the upper cover rotates in a first direction relative to the lower cover, the lower magnet group and the upper magnet group are repelled each other. When the upper cover drives the lower cover to rotate relative to the base in a second direction opposite to the first direction, the lower magnet group and the outer magnet group are repelled each other.

Description

Disassembled structure

This case is about a demountable structure, and in particular about a demountable structure with multiple uses.

The existing container is composed of an outer cover and a container housing. However, the functionality of the existing container tends to be single, and it is only suitable for containing fragrances and being placed on a desktop. In addition, the outer cover is mostly connected to the outer surface of the container housing by screwing, and the outer cover is rotated clockwise to lock on the container housing, and the outer cover is unlocked from the container housing by rotating counterclockwise.

However, the outer cover of the existing container needs to be accurately aligned with the housing so that the inner thread of the outer cover can be screwed into the outer thread of the housing, so the existing container is inconvenient to install.

A detachable structure of the present invention is used to be installed in a casing, and the detachable structure includes a base, a lower cover and an upper cover. The base is configured in the casing and has a receiving groove, a bottom surface and an outer magnet group, and the outer magnet group is attached to the bottom surface. The lower cover is rotatably configured in the receiving groove and has a lower magnet group. The upper cover is rotatably configured in the lower cover and has an upper magnet group. When the detachable structure is connected as a whole, the outer magnet group and the lower magnet group attract each other, and the lower magnet group and the upper magnet group attract each other. When the upper cover rotates in a first direction relative to the lower cover, the lower magnet group and the upper magnet group repel each other. When the upper cover drives the lower cover to rotate relative to the base in a second direction opposite to the first direction, the lower magnet group and the outer magnet group repel each other.

A disassembly structure of the present invention includes a lower cover and an upper cover. The lower cover has a lower magnet set. The upper cover is rotatably disposed on the lower cover and has an upper magnet set. When the disassembly structure is connected as a whole, the lower magnet set and the upper magnet set attract each other. When the upper cover rotates in a first direction relative to the lower cover, the lower magnet set and the upper magnet set repel each other.

Based on the above, the detachable structure of the present invention includes a base, a lower cover and an upper cover, all of which are connected as a whole through magnetic attraction. The magnetic attraction mechanism allows the user to only roughly align the lower cover and the upper cover to automatically guide the lower cover and the upper cover to the correct position through magnetic force during the installation process, thereby simplifying the installation steps of the detachable structure. There are two separation scenarios for the detachable structure. One is to apply external force to drive the upper cover to rotate relative to the lower cover, so that the upper magnet group and the lower magnet group are magnetically repelled, thereby separating the upper cover from the lower cover. The second is to drive the lower cover to rotate relative to the base through the upper cover, so that the lower magnet group and the external magnet group are magnetically repelled, thereby separating the upper cover and the lower cover from the base.

Furthermore, the detachable structure of the present invention is suitable for use as a fragrance container and a replaceable label, wherein the base is suitable for being fixed to the housing of an electronic device, and the upper cover and the lower cover are replaceable components. In addition, the upper cover and the lower cover can also be used separately, and the lower magnet set of the lower cover can be directly adsorbed on a magnetic material.

FIG. 1A is a three-dimensional schematic diagram of a disassembled structure according to an embodiment of the present invention. FIG. 1B is a three-dimensional schematic diagram of the disassembled structure of FIG. 1A with components disassembled. FIG. 1C is a three-dimensional schematic diagram of the disassembled structure of FIG. 1A from another angle. FIG. 1D is a three-dimensional schematic diagram of the disassembled structure of FIG. 1C with components disassembled. FIG. 1E is a three-dimensional schematic diagram of the disassembled structure of FIG. 1A combined with a housing.

1A and 1E , the detachable structure 100 of this embodiment is applicable to the housing 200 of a desktop computer, a laptop computer, a game console, an air purifier, a dehumidifier or other similar electronic devices. The detachable structure 100 can be used as a fragrance container, a replaceable label, a light-emitting module or any pattern, which can be arbitrarily matched according to the needs of the electronic device.

The detachable structure 100 of the present invention includes a base 110 , a lower cover 120 and an upper cover 130 .

1A, 1C and 1E, the base 110 is disposed on the housing 200 and has a receiving groove AG, a bottom surface BS and an outer magnet set 111. The receiving groove AG is formed on a top surface TS of the base 110, and the outer magnet set 111 is attached to the bottom surface BS. The base 110 is suitable for being disposed in the groove G of the housing 200 and fixed to the housing 200 by means of clamping, gluing, etc., wherein the outer magnet set 111 and the bottom surface BS are hidden in the groove G of the housing 200 (see FIG. 1E).

1A to 1D , the lower cover 120 is rotatably disposed in the receiving groove AG and has a lower magnet set 121, wherein the lower magnet set 121 is located inside the lower cover 120. The upper cover 130 is rotatably disposed in the lower cover 120 and has an upper magnet set 131, wherein the upper magnet set 131 is located inside the upper cover 130 and faces the lower magnet set 121. In addition, the outer surface of the upper cover 130 can be formed with a pattern, a label, or a light-emitting element can be installed.

2A to 2D are schematic diagrams showing the action flow of separating the upper cover from the lower cover of the detachable structure of FIG. 1A .

1B , 1D and 2A , when the detachable structure 100 is connected as one, the outer magnet assembly 111 and the lower magnet assembly 121 attract each other to position the lower cover 120 in the receiving groove AG of the base 110 , and the lower magnet assembly 121 and the upper magnet assembly 131 attract each other to combine the lower cover 120 and the upper cover 130 .

In addition, the lower cover 120 automatically aligns with the base 110 by magnetic attraction between the lower magnet set 121 and the outer magnet set 111, and the upper cover 130 automatically aligns with the lower cover 120 by magnetic attraction between the upper magnet set 131 and the lower magnet set 121, thereby improving the efficiency of the assembled and disassembled structure 100.

2A to 2C , when the upper cover 130 rotates relative to the lower cover 120 in a first direction D1, the lower magnet assembly 121 and the upper magnet assembly 131 repel each other. Referring to FIG. 2D , the upper cover 130 is separated from the lower cover 120 by magnetic repulsion, allowing the user to remove the upper cover 130 .

In other embodiments, when the upper cover 130 rotates relative to the lower cover 120 in the first direction D1, if the internal magnetic force is strong, the magnetic attraction between the upper cover 130 and the lower cover 120 is strong, and the upper cover 130 and the lower cover 120 can be removed at the same time. On the contrary, if the internal magnetic force is weak, the magnetic attraction between the upper cover 130 and the lower cover 120 is weak, and only the upper cover 130 can be removed.

The internal magnetic force comes from the thickness of the lower magnet assembly 121 and the upper magnet assembly 131. The thicker the lower magnet assembly 121 and the upper magnet assembly 131 are, the greater the internal magnetic force is. Therefore, the gap between the lower magnet assembly 121 and the upper magnet assembly 131 is also smaller. Therefore, when the upper cover 130 rotates, the upper magnet assembly 131 drives the lower magnet assembly 121 and the lower cover 120 to rotate synchronously, and then the upper cover 130 and the lower cover 120 are removed.

When the thickness of the lower magnet assembly 121 and the upper magnet assembly 131 is thinner, the internal magnetic force is smaller, so the gap between the lower magnet assembly 121 and the upper magnet assembly 131 is larger. Therefore, when the upper cover 130 rotates, it will drive the upper magnet assembly 131 to rotate relative to the lower magnet assembly 121 and the lower cover 120, and then the upper cover 130 is removed.

3A to 3D are schematic diagrams showing the process of separating the upper cover and the lower cover of the detachable structure of FIG. 1A from the base.

3A to 3C , when the upper cover 130 drives the lower cover 120 to rotate relative to the base 110 in a first direction D1 or a second direction D2 opposite to the first direction D1, the lower magnet group 121 and the outer magnet group 111 repel each other. Referring to FIG. 3D , the upper cover 130 and the lower cover 120 are separated from the base 110 by magnetic repulsion, so that the user can remove the upper cover 130 and the lower cover 120 at the same time.

Referring to FIG. 1B and FIG. 1D , the lower cover 120 has a rotating space RS and a spindle 122. The spindle 122 is disposed at a center of the rotating space RS, and the lower magnet assembly 121 is disposed at the periphery of the rotating space RS. The upper cover 130 has a rotating portion 132 disposed at a center of the upper cover 130. The rotating portion 132 is sleeved with the spindle 122 and is rotatably disposed in the rotating space RS. The upper magnet assembly 131 is located at the periphery of the rotating portion 132 and aligned with the lower magnet assembly 121.

Furthermore, when the upper cover 130 is pushed by an external force, the rotating portion 132 of the upper cover 130 pivots relative to the lower cover 120 about the spindle 122 .

1B and 1D , the lower cover 120 has a stopper 123 surrounding the outer periphery of the lower magnet assembly 121 and forming a sliding space S between two opposite ends of the stopper 123. An inner wall surface IS of the upper cover 130 forms a rib 133, which is movably disposed in the sliding space S and located between two ends of the stopper 123.

Furthermore, the upper cover 130 can push one end of the stopper 123 through the rib 133 to drive the lower cover 120 to rotate toward the first direction D1 or the other end thereof to drive the lower cover 120 to rotate toward the second direction D2.

1C and 1D , the outer magnet group 111 has six outer magnets M1, which are arranged around the bottom surface BS of the base 110. The magnetic pole sequence of the multiple outer magnets M1 away from the bottom surface BS is S pole, N pole, S pole, S pole, S pole, N pole. This indicates that the magnetic pole sequence of the multiple outer magnets M1 facing the bottom surface BS is N pole, S pole, N pole, N pole, N pole, S pole.

Referring to FIG. 1B , the lower magnet group 121 has four lower magnets M2, and the magnetic poles of the upper magnet group 131 of the multiple lower magnets M2 facing the upper cover 130 have two S poles and two N poles, wherein the two N poles are located on opposite sides of the lower cover 120, and the two S poles are adjacent to one of the N poles and spaced between the other N poles. This indicates that the order of the magnetic poles of the multiple lower magnets M2 attached to the lower cover 120 is N pole, S pole, N pole, S pole.

1D , the upper magnet assembly 131 has two upper magnets M3, which are located on opposite sides of the upper cover 130 and have their magnetic poles facing the lower magnet assembly 121 of the lower cover 120 as S poles. This means that the magnetic poles of the two upper magnets M3 attached to the upper cover 130 are both N poles.

2A, 1D and 1B, when the detachable structure 100 is connected as a whole, the two lower magnets M2 located on opposite sides of the lower cover 120 magnetically attract the two outer magnets M1 that are oppositely arranged and far away from the bottom surface BS as the S pole, and the other two lower magnets M2 of the lower cover 120 magnetically attract the two outer magnets M1 that are far away from the bottom surface BS as the N pole, so that the four lower magnets M2 magnetically attract the corresponding four outer magnets M1 respectively, thereby positioning the lower cover 120 in the receiving groove AG of the base 110. The two upper magnets M3 magnetically attract the two lower magnets M2 with N poles facing the upper cover 130 , so the two upper magnets M3 magnetically attract the corresponding two lower magnets M2 respectively, thereby positioning the upper cover 130 on the lower cover 120 .

Furthermore, the upper cover 130 and the lower cover 120 are automatically aligned through the magnetic attraction of the upper magnet M3 and the lower magnet M2 to form an integral module and can be used independently. In addition, the combined integral module (upper cover 130 and lower cover 120) and the base 110 are automatically aligned through the magnetic attraction of the lower magnet M2 and the outer magnet M1.

2A to 2C , when the upper cover 130 rotates relative to the lower cover 120 in a first direction D1, the rib 133 of the upper cover 130 slides in the sliding space S and moves away from the stopper 123, and at the same time, one of the upper magnets M3 of the upper cover 130 is aligned with one of the lower magnets M2 with an S pole facing the upper cover 130. At this time, one of the upper magnets M3 and one of the lower magnets M2 are magnetically repelled, and another of the upper magnets M3 is located between another of the lower magnets M2 with an S pole facing the upper cover 130 and another of the lower magnets M2 with an N pole facing the upper cover 130. At this time, another of the upper magnets M3 is not aligned with any of the lower magnets M2.

Furthermore, since one of the upper magnets M3 of the upper cover 130 and one of the lower magnets M2 magnetically repel each other, and the other upper magnet M3 is located at a gap and does not have magnetic attraction, the upper cover 130 can be separated from the lower cover 120 (see FIG. 2D ).

4A and 4B are schematic diagrams showing the relative positions of the lower magnet assembly and the outer magnet assembly of FIG. 3A and FIG. 3C , respectively.

3A to 3C , when the upper cover 130 drives the lower cover 120 to rotate relative to the base 110 in a second direction D2 opposite to the first direction D1, the rib 133 of the upper cover 130 pushes the stopper 123, so that the upper cover 130 and the lower cover 120 rotate synchronously. With reference to FIGS. 4A and 4B , the two lower magnets M2 located on opposite sides of the lower cover 120 respectively correspond to one of the outer magnets M1 with an N pole away from the bottom surface BS and one of the outer magnets M1 with an S pole away from the bottom surface BS, and the other two lower magnets M2 of the lower cover 120 respectively correspond to two of the outer magnets M1 with an S pole away from the bottom surface BS (with an N pole facing the bottom surface BS).

Furthermore, since the three adjacent lower magnets M2 of the lower cover 120 magnetically repel the corresponding outer magnets M1, the lower cover 120 and the upper cover 130 are separated from the base 110 (see FIG. 3D ).

In another embodiment, the rib 133 is close to the other end of the stopper 123. When the upper cover 130 drives the lower cover 120 to rotate relative to the base 110 in the first direction D1, the magnetic repulsion between the lower magnet set 121 and the outer magnet set 111 can be repeated, thereby removing the upper cover 130 and the lower cover 120.

Fig. 5A is a schematic three-dimensional exploded view of a disassembled structure according to another embodiment of the present invention. Fig. 5B is a schematic three-dimensional exploded view of the disassembled structure of Fig. 5A from another angle.

Referring to FIG. 5A and FIG. 5B , in another embodiment of the present invention, the detachable structure 100A is different from the detachable structure 100 shown in FIG. 1B in that the outer magnet group 111a of the base 110a has eight outer magnets M1, which are disposed around the bottom surface BS, and the order of the magnetic poles of the plurality of outer magnets M1 away from the bottom surface BS is N pole, S pole, S pole, N pole, S pole, S pole, S pole, S pole, and S pole. Among them, the size of the two outer magnets M1 between the two N poles and the two opposite outer magnets M1 is smaller than that of the other four outer magnets M1.

The lower magnet group 121a of the lower cover 120a has six lower magnets M2, and the magnetic poles of the multiple lower magnets M2 facing the upper magnet M3 of the upper magnet group 131a have two S poles and four N poles. The four lower magnets M2 of the four N poles are respectively located on the opposite sides of the lower cover 120a, and the two S poles are adjacent to two of the N poles and spaced between the other two N poles. 5B , the size of the four N-pole lower magnets M2 is smaller than the other two lower magnets M2. When the four smaller lower magnets M2 are aligned with the four smaller outer magnets M1, the automatic alignment function can be enhanced and the problem of small angle offset of the lower cover 120a and the upper cover 130a can be improved.

The disassembled structure 100 shown in FIG1B generates an offset of 6 degrees. Specifically, the number of magnetic lines of force of the four lower magnets M2 and the four outer magnets M1 in the magnetic center area of FIG1B and FIG1D is sufficient, and the lower cover 120 still has a magnetic attraction effect when there is a small angle offset relative to the base 110, resulting in the lower cover 120 not being completely aligned with the base 110.

The detachable structure 100A of this embodiment uses the magnetic attraction effect of four small-sized lower magnets M2 and four small-sized outer magnets M1 to reduce the offset to 1.5 degrees. Specifically, after the lower magnets M2 and outer magnets M1 at specific positions are split, their magnetic center areas will be reduced and they will tend to maintain a state of attraction, because the number of magnetic lines of force of the small-sized lower magnets M2 and the small-sized outer magnets M1 is not enough to maintain an angle offset greater than 1.5 degrees between the lower cover 120a and the base 110a, thereby achieving the purpose of accurately aligning the lower cover 120a with the base 110a.

The detachable structure of this case includes a base, a lower cover and an upper cover, all of which are connected as a whole through magnetic attraction. The magnetic attraction mechanism allows the user to roughly align the base, the lower cover and the upper cover to automatically guide the base, the lower cover and the upper cover to the correct position through magnetic force during the installation process, thereby simplifying the installation steps of the detachable structure. There are two separation scenarios for the detachable structure. One is to apply external force to drive the upper cover to rotate relative to the lower cover, so that the upper magnet group and the lower magnet group are magnetically repelled, thereby separating the upper cover from the lower cover. The second is to drive the lower cover to rotate relative to the base through the upper cover, so that the lower magnet group and the external magnet group are magnetically repelled, thereby separating the upper cover and the lower cover from the base.

Furthermore, the detachable structure of the present invention is suitable for use as a fragrance container and a replaceable label, wherein the base is suitable for being fixed to the housing of an electronic device, and the upper cover and the lower cover are replaceable components. In addition, the upper cover and the lower cover can also be used separately, and the lower magnet set of the lower cover can be directly adsorbed on a magnetic material.

100, 100a: detachable structure 110, 110a: base 111, 111a: outer magnet assembly 120, 120a: lower cover 121, 121a: lower magnet assembly 122: spindle 123: stopper 130, 130a: upper cover 131, 131a: upper magnet assembly 132: rotating part 133: rib 200: housing G: groove S: sliding space AG: receiving groove BS: bottom surface D1: first direction D2: second direction RS: rotating space M1: outer magnet M2: lower magnet M3: upper magnet TS: top surface

FIG. 1A is a three-dimensional schematic diagram of a detachable structure according to an embodiment of the present invention. FIG. 1B is a three-dimensional schematic diagram of the disassembled components of the disassembled structure of FIG. 1A. FIG. 1C is a three-dimensional schematic diagram of the disassembled structure of FIG. 1A from another angle. FIG. 1D is a three-dimensional schematic diagram of the disassembled components of the disassembled structure of FIG. 1C. FIG. 1E is a three-dimensional schematic diagram of the disassembled structure of FIG. 1A combined with a housing. FIG. 2A to FIG. 2D are schematic diagrams of the action flow of the upper cover of the disassembled structure of FIG. 1A being separated from the lower cover. FIG. 3A to FIG. 3D are schematic diagrams of the action flow of the upper cover and the lower cover of the disassembled structure of FIG. 1A being separated from the base. FIG. 4A and FIG. 4B are schematic diagrams of the relative positions of the lower magnet group and the outer magnet group of FIG. 3A and FIG. 3C, respectively. FIG. 5A is a schematic three-dimensional diagram of the disassembled components of a disassembled structure according to another embodiment of the present invention. FIG. 5B is a schematic three-dimensional diagram of the disassembled components of the disassembled structure of FIG. 5A from another angle.

100: Disassembly structure

110: Base

130: Upper cover

Claims (20)

A detachable structure is used to be installed in a casing, and the detachable structure includes: A base, which is arranged on the casing and has a receiving groove, a bottom surface and an outer magnet group, and the outer magnet group is attached to the bottom surface; A lower cover, which is rotatably arranged on the receiving groove and has a lower magnet group; and An upper cover, which is rotatably arranged on the lower cover and has an upper magnet group, wherein when the detachable structure is connected as a whole, the outer magnet group and the lower magnet group attract each other, and the lower magnet group and the upper magnet group attract each other, wherein when the upper cover rotates in a first direction relative to the upper cover, the lower magnet group and the upper magnet group repel each other, When the upper cover drives the lower cover to rotate relative to the base in a second direction opposite to the first direction, the lower magnet group and the outer magnet group repel each other. A detachable structure as described in claim 1, wherein the lower cover has a rotating space and a spindle, the spindle is arranged at a center of the rotating space, and the lower magnet assembly is arranged at the periphery of the rotating space. A detachable structure as described in claim 2, wherein the upper cover has a rotating portion disposed at a center of the upper cover, the rotating portion is sleeved with the spindle and rotatably disposed in the rotating space, and the upper magnet assembly is located at the periphery of the rotating portion and aligned with the lower magnet assembly. A detachable structure as described in claim 1, wherein the lower cover has a stop portion, which surrounds the outer periphery of the lower magnet assembly and the opposite ends of the stop portion are spaced to form a sliding space, and an inner wall surface of the upper cover forms a convex rib, which can be movably configured in the sliding space and is located between the two ends of the stop portion. A detachable structure as described in claim 1, wherein the outer magnet group has six outer magnets arranged around the bottom surface, and the order of the magnetic poles of the outer magnets farthest from the bottom surface is S pole, N pole, S pole, S pole, S pole, N pole. A detachable structure as described in claim 5, wherein the lower magnet group has four lower magnets, and the magnetic poles of the lower magnets facing the upper magnet group have two S poles and two N poles, the two N poles are located on opposite sides of the lower cover, and the two S poles are adjacent to one of the N poles and spaced apart from the other N pole. A detachable structure as described in claim 6, wherein the upper magnet set has two upper magnets, the upper magnets are located on opposite sides of the upper cover and the magnetic poles of the upper magnets facing the lower magnet set are all S poles. A detachable structure as described in claim 7, wherein when the detachable structure is connected as a whole, the two lower magnets located on opposite sides of the lower cover magnetically attract the two outer magnets that are oppositely arranged and away from the bottom surface with S poles, and the other two lower magnets of the lower cover magnetically attract the two outer magnets that are away from the bottom surface with N poles, and the two upper magnets magnetically attract the two lower magnets that are toward the upper cover with N poles. A detachable structure as described in claim 7, wherein when the upper cover is rotated in a first direction relative to the upper cover, one of the upper magnets is positioned opposite one of the lower magnets with an S pole facing the upper cover, and another of the upper magnets is positioned between another of the lower magnets with an S pole facing the upper cover and the lower magnet with an N pole facing the upper cover. A detachable structure as described in claim 7, wherein when the upper cover drives the lower cover to rotate relative to the base in a second direction opposite to the first direction, the two lower magnets located on opposite sides of the lower cover respectively align with one of the outer magnets that is located away from the bottom surface as an N pole and one of the outer magnets that is located away from the bottom surface as an S pole, and the other two lower magnets of the lower cover respectively align with two of the outer magnets that are located away from the bottom surface as an S pole. A detachable structure as described in claim 1, wherein the outer magnet group has eight outer magnets arranged around the bottom surface, and the order of the magnetic poles of the outer magnets away from the bottom surface is N pole, S pole, S pole, N pole, S pole, S pole, S pole, S pole, S pole. A detachable structure as described in claim 11, wherein the lower magnet group has six lower magnets, and the magnetic poles of the lower magnets facing the upper magnet group have two S poles and four N poles, the four N poles are located on opposite sides of the lower cover, the two S poles are adjacent to two of the N poles and are spaced apart from the other two N poles. A detachable structure comprises: a lower cover having a lower magnet group; and an upper cover rotatably disposed on the lower cover and having an upper magnet group; wherein, when the detachable structure is connected as a whole, the lower magnet group and the upper magnet group attract each other, wherein, when the upper cover rotates in a first direction relative to the upper cover, the lower magnet group and the upper magnet group repel each other. A detachable structure as described in claim 13, wherein the lower cover has a rotating space and a central shaft, the central shaft is arranged at a center of the rotating space, and the lower magnet assembly is arranged at the periphery of the rotating space. A detachable structure as described in claim 14, wherein the upper cover has a rotating portion disposed at a center of the upper cover, the rotating portion is sleeved with the spindle and rotatably disposed in the rotating space, and the upper magnet group is located at the periphery of the rotating portion and aligned with the lower magnet group. A detachable structure as described in claim 13, wherein the lower magnet group has four lower magnets, and the magnetic poles of the lower magnets facing the upper magnet group have two S poles and two N poles, the two N poles are located on opposite sides of the lower cover, and the two S poles are adjacent to one of the N poles and spaced apart from the other N pole. A detachable structure as described in claim 16, wherein the upper magnet group has two upper magnets, the upper magnets are located on opposite sides of the upper cover and the magnetic poles of the upper magnets facing the lower magnet group are all S poles. A detachable structure as described in claim 17, wherein when the detachable structure is connected as a whole, the two upper magnets magnetically attract the two lower magnets with N poles facing the upper cover. A detachable structure as described in claim 17, wherein when the upper cover is rotated in a first direction relative to the upper cover, one of the upper magnets is positioned opposite one of the lower magnets with an S pole facing the upper cover, and another of the upper magnets is positioned between another of the lower magnets with an S pole facing the upper cover and the lower magnet with an N pole facing the upper cover. A detachable structure as described in claim 13, wherein the lower magnet group has six lower magnets, and the magnetic poles of the lower magnets facing the upper magnet group have two S poles and four N poles, the four N poles are located on opposite sides of the lower cover, the two S poles are adjacent to two of the N poles and spaced apart from the other two N poles.

Images