FIELD
[0001] This application relates to the field of sanitary ware, and in particular to a toilet
seat with a fast detachable and installable cover assembly and a method for detaching
and installing the cover assembly of the toilet seat fast.
BACKGROUND
[0002] At present, for most toilet seats in the market, a toilet seat cover and/or a toilet
seat ring are fixed to a toilet seat body. The toilet seat cover and/or the toilet
seat ring of some toilet seats can be detached fast, however, the detachment process
is complicated, and even for some easily detachable toilet seats, it is required to
press a button or flip a switch, which causes inconveniences to detachment and installment
of the toilet seat cover and/or the toilet seat ring.
TECHNICAL ISSUE
[0003] At present, for most toilet seats in the market, a toilet seat cover and/or a toilet
seat ring are fixed to a toilet seat body. The toilet seat cover and/or the toilet
seat ring of some toilet seats can be detached fast, however, the detachment process
is complicated, and even for some easily detachable toilet seats, it is required to
press a button or flip a switch, which causes inconveniences to detachment and installment
of the toilet seat cover and/or the toilet seat ring.
SOLUTION TO THE TECHNICAL ISSUE
TECHNICAL SOLUTION
[0004] In view of defects in the conventional technology, an object of the present application
is to provide a toilet seat and a method for detaching and installing a cover assembly
of the toilet seat. The cover assembly of the toilet seat is fast detachable and installable,
and it is not required to press any switches in the detaching process.
[0005] A toilet seat is provided according to an aspect of the present application, and
the toilet seat includes: a main body; a cover assembly detachably connected to the
main body and rotatable with respect to the main body; a connecting mechanism arranged
between the main body and the cover assembly; wherein the connecting mechanism is
configured to detachably connect the cover assembly to the main body, and the connecting
mechanism includes a bushing arranged in the main body, wherein the bushing and the
main body form an engagement slot, and the engagement slot has a main body portion
formed by the main body and the main body portion is provided with a first beveled
opening; and a rotating shaft extendable and retractable with respect to the cover
assembly, wherein an end of the rotating shaft is provided with an engagement portion,
and in a case when the rotating shaft extends out with respect to the cover assembly,
the engagement portion is in engagement with the engagement slot to fix the cover
assembly to the main body.
[0006] Preferably, the connecting mechanism further includes an elastic component, and the
elastic component has one end fixedly connected to the rotating shaft and another
end fixedly connected to the cover assembly, to allow the rotating shaft to extend
out with respect to the cover assembly under the action of the elastic component.
[0007] Preferably, the elastic component is a spring, and the spring has one end connected
to the cover assembly and another end connected to the rotating shaft.
[0008] Preferably, the first beveled opening is arranged in a detachment direction of the
engagement slot, and in a case when the rotating shaft moves upward in the detachment
direction along with the cover assembly, the first beveled opening is configured to
guide the rotating shaft to retract into the cover assembly.
[0009] Preferably, the rotating shaft is provided with a second beveled opening, and the
second beveled opening is configured to cooperate with the first beveled opening to
allow the rotating shaft to retract into the cover assembly.
[0010] Preferably, the connecting mechanism further includes a bushing, and the bushing
is provided with a third beveled opening, and the third beveled opening is configured
to cooperate with the first beveled opening to allow the rotating shaft to retract
into the cover assembly.
[0011] Preferably, a position-limiting groove is provided at a joint where the cover assembly
is connected to the main body and is arranged in a transverse direction of the cover
assembly, and the elastic component and the rotating shaft are located in the position-limiting
groove.
[0012] Preferably, the rotating shaft is rotatable synchronously with the cover assembly.
[0013] A method for detaching the cover assembly of the toilet seat described above is provided
according to another aspect of the present application, and the method includes the
following steps: rotating the cover assembly to a detachment position; and moving
the cover assembly upward in the detachment direction, wherein in a process when the
cover assembly is moved upward, the rotating shaft is moved upward along with the
cover assembly to be retracted into the cover assembly, and then the cover assembly
is not connected to the main body to allow the cover assembly to be detached from
the main body.
[0014] A method for installing the cover assembly of the toilet seat described above is
provided according to yet another aspect of the present application, and the method
includes the following steps: moving the rotating shaft and maintaining the rotating
shaft within the cover assembly; placing the cover assembly above a joint between
the main body and the cover assembly; and moving the cover assembly downward in the
detachment direction, wherein in a process when the cover assembly is moved downward
in the detachment direction, the rotating shaft is moved downward along with the cover
assembly to extend out of the cover assembly and the engagement portion of the rotating
shaft is located in the engagement slot, to connect the cover assembly to the main
body in an engagement manner.
BENEFICIAL EFFECTS OF THE PRESENT APPLICATION
BENEFICIAL EFFECTS
[0015] The toilet seat according to the present application enables a fast detachment and
installment of the cover assembly with respect to the main body by providing the connecting
mechanisms between the cover assembly and the main body. Therefore, the toilet seat
has advantages such as having a high installation efficiency, being convenient for
clearing hidden dirt and its cover assembly being easy to detach in maintenance.
BRIEF DESCRIPTION OF THE DRAWINGS
DESCRIPTION OF THE DRAWINGS
[0016] In conjunction with the detailed description of non-limitative embodiments with reference
to the drawings, other features, objects and advantages of the present application
will become apparent.
Figure 1 is a perspective view of a toilet seat according to the present application;
Figure 2 is a schematic structural view showing a longitudinal section of the toilet
seat when a rotating shaft of a connecting mechanism of the toilet seat is at a first
position according to the present application;
Figure 3 is a perspective view of the rotating shaft of the connecting mechanism of
the toilet seat according to the present application;
Figure 4 is a perspective view of an engagement slot and a bushing of the connecting
mechanism of the toilet seat according to the present application;
Figure 5 is a perspective view of the rotating shaft connected to the engagement slot
when the rotating shaft of the connecting mechanism of the toilet seat is at a second
position according to the present application;
Figure 6 is a side view of the rotating shaft connected to the engagement slot when
the rotating shaft of the connecting mechanism of the toilet seat is at the second
position according to the present application;
Figure 7 is a schematic structural view showing a longitudinal section taken along
line A-A in Figure 6;
Figure 8 is a perspective view of the toilet seat according to the present application;
Figure 9 is a perspective view of the rotating shaft connected to the engagement slot
when the rotating shaft of the connecting mechanism of the toilet seat is at a third
position according to the present application;
Figure 10 is a side view of the rotating shaft connected to the engagement slot when
the rotating shaft of the connecting mechanism of the toilet seat is at the third
position according to the present application;
Figure 11 is a schematic structural view showing a longitudinal section taken along
line B-B in Figure 10;
Figure 12 is a perspective view of the toilet seat according to the present application;
Figure 13 is a perspective view of the rotating shaft connected to the engagement
slot when the rotating shaft of the connecting mechanism of the toilet seat is located
between the second position and the third position according to the present application;
Figure 14 is a side view of the rotating shaft connected to the engagement slot when
the rotating shaft of the connecting mechanism of the toilet seat is located between
the second position and the third position according to the present application;
Figure 15 is a schematic structural view showing a longitudinal section taken along
line C-C in Figure 14;
Figure 16 is a schematic structural view showing a longitudinal section of a toilet
seat when the rotating shaft of the connecting mechanism of the toilet seat is located
between the second position and the third position or at the third position according
to the present application;
Figure 17 is a schematic structural view showing a longitudinal section of a toilet
seat when the rotating shaft of the connecting mechanism of the toilet seat is located
between the first position and the second position according to the present application;
Figure 18 is a schematic structural view showing a longitudinal section of a toilet
seat when the rotating shaft of the connecting mechanism of the toilet seat is at
the first position according to the present application; and
Figure 19 is a schematic structural view showing a longitudinal section of the toilet
seat after a cover assembly of the toilet seat is detached according to the present
application.
DETAILED DESCRIPTION OF EMBODIMENTS
EMBODIMENTS OF THE PRESENT APPLICATION
[0017] Technical contents of the present application are further explained below in conjunction
with the drawings and embodiments.
[0018] It is to be noted that description of directions or positions in the present application,
for example "above/upper", "below/lower" and "horizontal" and so on, is made with
reference to the drawings, however, changes may be made as required, and the changes
made are all included in the scope of protection of the present application. In addition,
the terms "first", "second" and the like are for purpose of description, and should
not be interpreted as indicating or implying relative importance or implying the number
of the indicated technical features. Further, "first position" herein refers to a
position where the rotating shaft is located in a cover assembly when the cover assembly
is at a detachment position, the rotating shaft is retracted into the cover assembly
and the cover assembly is not connected to a main body. "Second position" refers to
a position where the rotating shaft is located in the cover assembly when the cover
assembly is at the detachment position, the rotating shaft is retracted into the cover
assembly and the cover assembly is connected to the main body. "Third position" refers
to a position where the rotating shaft is located when the cover assembly is at a
horizontal position and is connected to the main body. Positions of components of
the toilet seat and connection relations therebetween when the rotating shaft is at
the first position, the second position and the third position may be described in
detail hereinafter.
[0019] Reference is made to Figure 1 which is a perspective view of a toilet seat according
to the present application. In a preferred embodiment of the present application,
the toilet seat mainly includes a main body 1, a cover assembly 2 and a connecting
mechanism 3 (see Figure 2). The cover assembly 2 is detachably connected to the main
body 1, and the cover assembly 2 is rotatable with respect to the main body 1. Preferably,
the cover assembly 2 includes an upper cover and a seat ring.
[0020] Reference is made to Figure 2 which is a schematic structural view showing a longitudinal
section of the toilet seat according to the present application. As shown in Figure
2, two transverse sides of the toilet seat both have a connecting mechanism 3. The
two connecting mechanisms 3 at two sides of the toilet seat are bilaterally symmetrical
about a central line of the toilet seat in a detachment direction for detaching the
cover assembly 2 from the main body 1. Only the connecting mechanism 3 at one side
is explained below as an example. The connecting mechanism 3 is arranged between the
main body 1 and the cover assembly 2. The connecting mechanism 3 is configured to
detachably connect the cover assembly 2 to the main body 1. In a preferred embodiment
shown in Figure 2, the connecting structure 3 includes an engagement slot 31, a rotating
shaft 32, an elastic component 33 and a bushing 34.
[0021] Reference is made to Figures 3 to 7, which are respectively a perspective view of
the rotating shaft of the connecting mechanism, a perspective view of the engagement
slot and the bushing of the connecting mechanism, a perspective view and a side view
of the rotating shaft connected to the engagement slot and a schematic structural
view of a longitudinal section of the rotating shaft connected to the engagement slot
when the cover assembly of the toilet seat is at a detachment position according to
the present application. As shown in Figure 2, Figure 4 and Figure 7, the bushing
34 is arranged in the main body 1, and the bushing 34 and the main body 1 form the
engagement slot 31. The engagement slot 31 has a main body portion formed by the main
body, and the main body portion is provided with a first beveled opening 311. As shown
in Figure 2, the engagement slot 31 is preferably a through slot. The first beveled
opening 311 is arranged in the main body 1 (see Figure 7). The first beveled opening
311 is arranged on an inner surface of the main body portion of the engagement slot
31. In the preferred embodiment shown in Figure 2, Figure 4 and Figure 7, the first
beveled opening 311 is arranged along the detachment direction, and the first beveled
opening 311 is inclined upward and outward from the inside of the engagement slot
31.
[0022] As shown in Figure 2, a position-limiting groove 21 is provided at a joint where
the cover assembly 2 is connected to the main body 1 and is arranged along a transverse
direction of the cover assembly 2. The position-limiting groove 21 is configured to
permit the rotating shaft 32 and the elastic component 33 to move only in the transverse
direction. The rotating shaft 32 is arranged between the cover assembly 2 and the
main body 1 and is located in the position-limiting groove 21, and the rotating shaft
32 is movable transversely with respect to the cover assembly 2 between a first position
and a second position. When the rotating shaft 32 is at the first position, the rotating
shaft 32 is entirely located in the position-limiting groove 21. When the rotating
shaft 32 is at the second position, an end of the rotating shaft 32 extends out of
the position-limiting groove 21. The rotating shaft 32 shown in Figure 2 is at the
second position. Further, as shown in Figure 2, Figure 3 and Figure 7, an engagement
portion 321 is provided on an end surface of an end of the rotating shaft 32. The
engagement portion 321 is a protrusion protruding from the end surface of the end
of the rotating shaft 32. When the rotating shaft 32 is at the second position, the
engagement portion 321 is arranged in the detachment direction and is located in the
engagement slot 31. When the rotating shaft 32 moves upward, the engagement portion
321 first comes into contact with the first beveled opening 311 of the engagement
slot 31 (as shown in Figure 2), and then when the rotating shaft 32 continues to move
upward, the engagement portion 321 is subjected to a transverse force component from
the first beveled opening 311, which may push the rotating shaft 32 to the first position
(see positions of the rotating shaft 32 in Figures 18 and 19).
[0023] Further, in a preferred embodiment of the present application, the engagement portion
321 is provided with a second beveled opening 322 corresponding to the first beveled
opening 311 inside the engagement slot 31, as shown in Figure 7. The second beveled
opening 322 is preferably inclined upward from a shaft center of the rotating shaft
32 towards an edge of the rotating shaft 32. The second beveled opening 322 is capable
of cooperating with the first beveled opening 311, to push the rotating shaft 32 to
the first position when the rotating shaft 32 moves upward.
[0024] Further, as shown in Figures 5 and 6, the rotating shaft 32 can rotate synchronously
with the cover assembly 2. In Figure 6, a rotation direction of the rotating shaft
32 rotating along with the cover assembly 2 is a clockwise direction. Specifically,
when the rotating shaft 32 is at the second position, the rotating shaft 32 can rotate
synchronously with the cover assembly 2 to a third position (positions of the rotating
shaft shown in Figures 14 and 15 are between the second position and the third position,
and positions of the rotating shaft shown in Figures 9 and 10 are the third position).
It may be understood that a transverse distance between the third position and the
first position is equal to a transverse distance between the second position and the
first position. When the rotating shaft 32 rotates from the second position, or is
located between the second position and the third position or is at the third position,
the rotating shaft 32 cannot move to the first position, and the engagement portion
321 is confined in the engagement slot 31 and cannot move upward, and thus the cover
assembly 2 cannot be detached from the main body 1.
[0025] The elastic component 33 is located within the position-limiting groove 21 and is
connected between the cover assembly 2 and the rotating shaft 32, and is configured
to drive the rotating shaft 32 to move transversely from the first position to the
second position. Preferably, as shown in Figure 2, the elastic component 33 is a spring,
and the spring has one end connected to the cover assembly 2 and another end connected
to the rotating shaft 1.
[0026] The bushing 34 is arranged in the main body 1 and configured to abut against the
engagement portion 321 of the rotating shaft 32. As shown in Figure 7, the bushing
34 includes a third beveled opening 341 matching the first beveled opening 311. When
the rotating shaft 32 moves upward, the third beveled opening 341 cooperates with
the first beveled opening 311 to guide the rotating shaft 32 to move from the second
position to the first position. As shown in Figure 7, the third beveled opening 341
may be considered as an extension, extending toward the inside of the main body 1,
of the first beveled opening 311.
[0027] Further, referring to Figures 1 to 7, when the rotating shaft 32 is at the second
position, the cover assembly 2 is at the detachment position. In this state, the engagement
portion 321 of the rotating shaft 32 is located in the engagement slot 31, and when
the cover assembly 2 drives the rotating shaft 32 to move upward in the detachment
direction, the engagement portion 321 of the rotating shaft 32 moves to the first
position under the action of the first beveled opening 311, and in turn, the cover
assembly 2 can be detached from the main body 1 in the detachment direction.
[0028] Further, a method for detaching the cover assembly of the toilet seat described above
is also provided according to the present application. Reference is made to Figures
8 to 19 which are respectively a perspective view of the toilet seat and a schematic
structural view of a longitudinal section of the toilet seat, a perspective view and
a side view of the connecting mechanism and a schematic structural view of a longitudinal
section of the connecting mechanism in the whole process when the cover assembly of
the toilet seat rotates from the horizontal position to the detachment position and
then is detached from the main body according to present application.
[0029] Reference is made to Figures 8 to 11 which are respectively a perspective view of
the toilet seat when the cover assembly of the toilet seat is at the horizontal position,
a perspective view and a side view of the rotating shaft connected to the engagement
slot and a schematic structural view of a longitudinal section of the rotating shaft
connected to the engagement slot according to the present application. When the cover
assembly 2 is at the horizontal position, the rotating shaft 32 is at the third position.
Since the first beveled opening 311 is arranged in the detachment direction and the
position of the engagement portion 321 of the rotating shaft 32 at the third position
does not correspond to the position of the first beveled opening 311, the engagement
portion 321 is restricted by the engagement slot 31 and cannot move upward (see Figure
11), and in turn, the cover assembly 2 connected to the rotating shaft 32 by the elastic
component 33 cannot move upward. In this state, the cover assembly 2 cannot be detached
from the main body 1.
[0030] Reference is made to Figures 12 to 15 which are respectively a perspective view of
the toilet seat when the cover assembly of the toilet seat is rotated to a position
between the detachment position and the horizontal position, a perspective view and
a side view of the rotating shaft connected to the engagement slot and a schematic
structural view of a longitudinal section of the rotating shaft connected to the engagement
slot according to the present application. When the cover assembly 2 is rotated to
the position between the detachment position and the horizontal position, the rotating
shaft 32 is accordingly rotated to a position between the second position and the
third position. Similar to the case when the rotating shaft 32 is at the third position,
since the first beveled opening 311 is arranged in the detachment direction and the
position of the engagement portion 321 of the rotating shaft 32 between the second
position and the third position does not correspond to the position of the engagement
slot 31, the engagement portion 321 is still restricted by the engagement slot 31
and cannot move upward (see Figure 15), and in turn, the cover assembly 2 connected
to the rotating shaft 32 by the elastic component 33 cannot move upward. In this state,
the cover assembly 2 also cannot be detached from the main body 1.
[0031] Therefore, if it is required to detach the cover assembly 2 from the main body 1,
it is required to rotate the cover assembly 2 to the detachment position, and then
to rotate the rotating shaft 32 to the second position accordingly.
[0032] Reference is made to Figure 2 and Figures 16 to 19 which are respectively schematic
structural views of the longitudinal section of the toilet seat in the whole process
when the cover assembly is rotated from the horizontal position to the detachment
position and then detached from the main body. As shown in Figure 2 and Figure 16,
when the rotating shaft 32 is rotated from a position between the second position
and the third position or from the third position (shown in Figure 16) to the second
position (shown in Figure 2), the engagement portion 321 of the rotating shaft 32
is rotated to a position where the engagement portion 321 is arranged in the detachment
direction, to allow the engagement portion 321 to abut against the first beveled opening
311 arranged in the detachment direction. Therefore, when the rotating shaft 32 moves
upward, the engagement portion 321 can move along the first beveled opening 311. In
this state, by moving the cover assembly 2 upward, the rotating shaft 32 will move
upward along with the cover assembly 2. In a process when the engagement portion 321
of the rotating shaft 32 moves along the first beveled opening 311, the first beveled
opening 311 applies a transverse force component on the engagement portion 321, and
the transverse force component is capable of pushing the rotating shaft from the second
position to the first position.
[0033] Referring to Figures 17 and 18, when the rotating shaft 32 is moved to the first
position under the action of the transverse force component applied by the first beveled
opening 311 on the engagement portion 321, the rotating shaft 32 completely enters
into the position-limiting groove 21, and the cover assembly 2 is not connected to
the main body 1 (as shown in Figure 18). Therefore, by further moving the cover assembly
2 upward, the cover assembly 2 can be separated from the main body 1. As shown in
Figure 19, the cover assembly 2 in Figure 19 is separated from the main body 1, thus,
the detachment of the cover assembly 2 is completed.
[0034] Further, a method for installing the cover assembly of the toilet seat described
above is further provided according to the present application. It may be understood
that installing steps of the cover assembly 2 are reversed relative to detaching steps
of the cover assembly 2. Specifically, first the rotating shafts 32 of the two connecting
mechanisms 3 at the two sides of the cover assembly 2 and the main body 1 are moved
and maintained at the first position, as shown in Figure 19, in this process, the
rotating shafts 32 may be pressed manually to the first position; then, the cover
assembly 2 is placed above the joint between the main body 1 and the cover assembly
2; and then the cover assembly 2 is moved downward into alignment with the first beveled
opening 311, and in a process when the cover assembly 2 is moved downward in the detachment
direction, the rotating shaft 32 is moved downward along with the cover assembly 2
while an elastic force of the elastic component 33 causes the rotating shaft 32 to
move in a direction from the first position toward the second position, and when the
rotating shaft 32 is located at the second position, the engagement portion 321 of
the rotating shaft 32 is located in the engagement slot 31, and thus the cover assembly
2 is connected to the main body 1 in an engagement manner. Thus, installment of the
cover assembly 2 is completed.
[0035] Further, as set forth in the foregoing description, the detachment position described
in the present application is a position where the first beveled opening 311 matches
the third beveled opening 341. The detachment direction is a direction in which detachment
is performed along the foreging detachment position.
[0036] In conclusion, in combination with the embodiments shown in Figures 1 to 19, it is
understood by the person skilled in the art that the toilet seat according to the
present application enables a fast detachment and installment of the cover assembly
with respect to the main body by providing the connecting mechanisms between the cover
assembly and the main body. Therefore, the toilet seat has advantages such as having
a high installation efficiency, being convenient for clearing hidden dirt and its
cover assembly being easy to detach in maintenance.
[0037] Although the present application has been disclosed hereinabove by the preferred
embodiments, the preferred embodiments are not intended to limit the present application.
Various changes and modifications may be made by the person skilled in the art without
departing from the spirit and scope of the present application. Therefore, the scope
of protection of the present application is defined by the claims.
INDUSTRIAL APPLICABILITY
[0038] The toilet seat according to the present application enables a fast detachment and
installment of the cover assembly with respect to the main body by providing the connecting
mechanisms between the cover assembly and the main body. Therefore, the toilet seat
has advantages such as having a high installation efficiency, being convenient for
clearing hidden dirt and its cover assembly being easy to detach in maintenance.
1. A toilet seat, comprising:
a main body;
a cover assembly detachably connected to the main body and rotatable with respect
to the main body; and
a connecting mechanism arranged between the main body and the cover assembly; and
wherein the connecting mechanism is configured to detachably connect the cover assembly
to the main body, and the connecting mechanism comprises:
a bushing arranged in the main body, wherein the bushing and the main body form an
engagement slot; and
a rotating shaft extendable and retractable with respect to the cover assembly, wherein
an end of the rotating shaft is provided with an engagement portion, and in a case
when the rotating shaft extends out with respect to the cover assembly, the engagement
portion is in engagement with the engagement slot to fix the cover assembly to the
main body.
2. The toilet seat according to claim 1, wherein the connecting mechanism further comprises
an elastic component, and the elastic component has one end fixedly connected to the
rotating shaft and another end fixedly connected to the cover assembly, to allow the
rotating shaft to extend out with respect to the cover assembly under the action of
the elastic component.
3. The toilet seat according to claim 2, wherein the elastic component is a spring, and
the spring has one end connected to the cover assembly and another end connected to
the rotating shaft.
4. The toilet seat according to claim 1, wherein the engagement slot has a main body
portion formed by the main body and the main body portion is provided with a first
beveled opening, the first beveled opening is arranged in a detachment direction of
the engagement slot, and in a case when the rotating shaft moves upward in the detachment
direction along with the cover assembly, the first beveled opening is configured to
guide the rotating shaft to retract into the cover assembly.
5. The toilet seat according to claim 4, wherein the rotating shaft is provided with
a second beveled opening, and the second beveled opening is configured to cooperate
with the first beveled opening to allow the rotating shaft to retract into the cover
assembly.
6. The toilet seat according to claim 1, wherein the bushing is provided with a third
beveled opening, and the third beveled opening is configured to cooperate with the
first beveled opening to allow the rotating shaft to retract into the cover assembly.
7. The toilet seat according to claim 2, wherein a position-limiting groove is provided
at a joint where the cover assembly is connected to the main body and is arranged
in a transverse direction of the cover assembly, and the elastic component and the
rotating shaft are located in the position-limiting groove.
8. The toilet seat according to claim 1, wherein the rotating shaft is rotatable synchronously
with the cover assembly.
9. A method for detaching the cover assembly of the toilet seat according to any one
of claims 1 to 8, comprising:
rotating the cover assembly to a detachment position; and
moving the cover assembly upward in the detachment direction, wherein in a process
when the cover assembly is moved upward, the rotating shaft is moved upward along
with the cover assembly to be retracted into the cover assembly, and then the cover
assembly is not connected to the main body to allow the cover assembly to be detached
from the main body.
10. A method for installing the cover assembly of the toilet seat according to any one
of claims 1 to 8, comprising:
moving the rotating shaft and maintaining the rotating shaft within the cover assembly;
placing the cover assembly above a joint between the main body and the cover assembly;
and
moving the cover assembly downward in the detachment direction, wherein in a process
when the cover assembly is moved downward in the detachment direction, the rotating
shaft is moved downward along with the cover assembly to extend out of the cover assembly
and the engagement portion of the rotating shaft is located in the engagement slot,
to connect the cover assembly to the main body in an engagement manner.