Technical field of the invention
The disclosure relates to the technical field of low voltage electrical
apparatuses, particularly to a rotating assembly structure of a protective cover
and a contactor having the structure.
Background of the invention
A contactor refers to a mechanical switch apparatus operated
non-manually to bear and frequently connect and disconnect a current of a
normal circuit. With the rapid development of the field of low voltage electrical
apparatuses, the market has raised higher requirements on the miniaturization,
individuation and insulating performance of a contact product.
A contactor widely applied at present comprises a housing structure
formed by a housing and a protective cover, and energized conductors with
several phases provided in the housing structure and consisting of tile-shape
wiring screws, contact plates, wiring terminals and so on. A contactor with
energized conductors with four phases is widely applied at present. Affected
by factors comprising an inherent structure, an installation space and so on of
a product, it is necessary to install a protective cover of some contactor
products on a corresponding housing through a corresponding rotating
assembly structure.
An existing rotary assembly structure of protective cover is as shown in
Fig. 1-3. a plurality of insulation walls 11 are provided at an evenly interval in a
housing 1. An energized conductor with one phase is provided between two
adjacent insulation walls 11. A certain gap is reserved between the energized
conductor and the two adjacent insulation walls 11. A protective cover 2 is an
integral structure installed above the energized conductor. On outward sides of
the energized conductor of each phase, as many first protective walls 21 as
energized conductors are formed on the protective cover 2, so as to prevent an
electric shock on a user during an operation and ensure use safety. A square
hole 212 is formed on at least one of the first protective walls 21, and at least
one slope boss 213 is provided on a location which is on a second protective
wall 23 on the top of the protective cover 2 and away from the square hole 212.
A boss 12 matched with the square hole 212 is shaped on at least one of the
insulation walls 11, and an slope groove 13 matched with the slope boss 213 is
shaped on the top of at least one of the insulation walls 11.
During a process of assembly, the protective cover 2 is placed obliquely
first, and then rotated inwards so that a third protective wall 24 of the protective
cover 2 is inserted into a gap behind a tile-shape wiring screw 3, and the
square hole 212 is sleeved on the boss 12 of the housing 1. In the meanwhile,
the slope boss 213 on the protective cover 2 is clamped into the slope groove
13 on the housing 1, so as to complete assembling the protective cover and
the housing. Fig. 3 shows the housing 1 and the protective cover 2 after the
assembly. A degree of freedom of the protective cover 2 in an X direction is
locked fixation by a face A of the slope groove 13 and a face C of the insulating
blocking walls 11 while a degree of freedom of the protective cover 2 in a Y
direction is locked fixation by a face B of the insulating blocking walls 11 and a
face D of the boss 12.
However, the assembly structure has the following problems in use.
Firstly, in the prior art, as shown in Fig. 3, since the boss 12 is shaped on
the insulating blocking walls 11 of the housing 1, the location of a calculating
point of the shortest electric leakage path (a creepage distance) of the housing
below the boss 12 on the insulating blocking walls 11, i.e. the location of a
corner 14 is low, thus the shortest electric leakage path S1 from the position of
the outmost edge of the energized conductors of the tile-shape wiring screws 3
to the corner 13 of the housing 1 is short. Therefore, the shortest electric
leakage path of such a contactor can be hardly ensured, which results in
2
potential safety hazard.
Secondly, in the prior art, a location of an acting force for limiting an
upward movement of the protective cover 2 in the Y direction is located on an
inner wall of the square hole 212 matched with a face 0 of the boss 12 and is
relatively far from the center of the protective cover 2 after the square hole 212
is matched with the boss 12, and limited by an injection molding process, the
protective cover 2 has to be machined with a thin wall, thereby resulting in a
small depth of the square hole 212, and a relatively small effective matching
surface that is almost approximate to point constraint between the inner wall of
the square hole 212 and the boss 12. In addition, the square hole 212 and the
boss 12 are in clearance fit, thus finally resulting that a effective matching
surface is seriously eccentric point constraint for a degree of freedom of the
center of the protective cover 2 in the Y direction, the reliability in position
limitation and fixation of the upward movement in the Y direction is extremely
low, and thus the protective cover 2 is very easy to loosen and separate from
the housing 1.
To sum up, the rotary assembly structure of protective cover in the prior art
can hardly ensure the shortest electric leakage path of the contactor and the
reliability in position limitation and fixation of the upward movement in the Y
direction is poor after installation.
Summary of the invention
For this purpose, the disclosure provides a rotary assembly structure of a
protective cover and a contactor having the structure which are highly reliable
in fixation and position limitation of a protective cover, have a relatively high
location of a calculating point of the shortest electric leakage path, enabling the
shortest electric leakage path to more easily satisfy a requirement, so as to
solve the technical problem that the requirement of the shortest electric
leakage path of the contactor product is hardly satisfactory because a rotary
assembly structure of the protective cover in the prior art has low reliability in
3
fixation and position limitation of an upward movement of the protective cover
in a Y direction and the location of the calculating point of the shortest electric
leakage path is relatively low.
The disclosure applies the following technical solution so as to solve the
technical problem above.
A rotary assembly structure of a protective cover, configured to install the
protective cover on a housing.
The housing comprises a plurality of insulating blocking walls provided at
an evenly interval, and an energized conductor is provided between two
adjacent insulating blocking walls.
The protective cover comprises a plurality of side walls which are matched
with the insulating blocking walls and provided at an evenly interval.
The rotary assembly structure comprises an inclined plane limiting
mechanism; the inclined plane limiting mechanism comprises a first step
matching inclined plane provided on the insulating blocking walls and a second
step matching inclined plane provided on the side walls and matched with the
first step matching inclined plane.
A step protruding on a plane where at least one of the insulating blocking
walls locate is formed on at least one side face of at least one of the insulating
blocking walls close to the energized conductor; a connection surface of a
plane where the step locates and a plane where the corresponding insulating
blocking wall locates is a first step matching surface, and at least one part of
the first step matching surface obliquely extends from inner to outside in a
direction away from the energized conductor to form the first step matching
inclined plane.
Phase-to-phase insulation walls are provided on the side walls; a plane
where at least one of the phase-to-phase insulation walls locates protrudes on
a plane where one of the corresponding side wall locates; a connection
surface of a plane where the phase-to-phase insulation wall locates and a
plane where one of the corresponding side wall locates is a second step
4
matching surface; at least one part of the second step matching surface
obliquely extends from inner to outside in a direction away from the energized
conductor to form the second step matching inclined plane; the second step
matching inclined plane can be adapted for matching with the first step
matching inclined plane in a contact manner to form the inclined plane limiting
mechanism, so as to limit an upward movement of the protective cover in a Y
direction after the protective cover is installed on the housing.
The rotary assembly structure of the protective cover further comprises a
clamping platform locating mechanism configured to further limit the upward
movement of the protective cover in the Y direction after the protective cover is
installed on the housing; and comprising:
a clamping platform provided on an upper part of at least one third
protective wall of the protective cover;
a clamping platform matching surface, which is a lower surface of a top
plate of the housing, and matched with the clamping platform to prevent the
clamping platform from being separated.
In the rotary assembly structure of the protective cover, the clamping
platform is a trapezoid with a longer waist line provided close to the energized
conductor, and a upper line provided at a location away from a first protective
wall of the protective cover; the clamping platform matching surface is
matched with a shorter waist line of the clamping platform.
In the rotary assembly structure of the protective cover, the clamping
platform is a triangle, and a side having the smallest slope of the clamping
platform is matched with the clamping platform matching surface.
The rotary assembly structure of the protective cover further comprises a
slope boss locating mechanism; the slope boss locating mechanism IS
configured to limit an outward movement of the protective cover in an X
direction after the protective cover is installed on the housing, and comprising:
a slope groove, shaped on the top of at least one of the insulation walls;
a slope boss, matched with the slope groove, and provided on a location
5
on a second protective wall on the top of the protective cover away from a first
protective wall of the protective cover.
In the rotary assembly structure of the protective cover, the slope groove
and the slope boss are matched trapezoids having longer waist line provided
close to the first protective wall.
In the rotary assembly structure of the protective cover, the slope groove
and the slope boss are matched triangles.
A contactor applying the rotary assembly structure of the protective cover
comprises the housing and the protective cover installed on the housing
through the rotary assembly structure.
In the contactor, a notch structure is shaped on an outward edge of the
insulating blocking walls and close to the installation location of the protective
cover, so as to form a shortest electric leakage path starting from a position of
the outermost end of an edge of the energized conductor, rectilinearly creeping
along surfaces of phase-to-phase insulation walls, and then turning to creep
along the surfaces of a first protective wall of the protective cover or the
insulating blocking walls to a notch corner point of the notch mechanism.
In the contactor, the rotary assembly structure further comprises a slope
boss locating mechanism and a clamping platform locating mechanism.
Compared with the prior art, the technical solution of the disclosure has
the following advantages.
First, the rotary assembly structure of the protective cover provided by the
disclosure comprises the inclined plane limiting mechanism, and the upward
movement of the protective cover in the Y direction after the protective cover is
installed on the housing is limited by matching the second step matching
inclined plane and the first step matching inclined plane. After the second step
matching inclined plane and the first step matching inclined plane are matched,
a location of an acting force for limiting the upward movement of the protective
cover in the Y direction is on the first step matching inclined plane of the
insulating blocking walls of the housing. Since the first step matching inclined
6
plane is a plane having a certain width and a certain length, surface constraint
is formed for a degree of freedom of the center of the protective cover in the Y
direction, thereby limiting the upward movement in the Y direction and an
inward rotation of the protective cover reliably and stably, and the product
quality is improved.
Secondly, the rotary assembly structure of the protective cover provided
by the disclosure further comprises the clamping platform locating mechanism
for further limiting the upward movement in the Y direction and a rotation
from inner to outside of the protective cover after the protective cover is
installed on the housing, and comprising the clamping platform and the
clamping platform matching surface, which are simple in structure, easy to
machine and implement, and are also convenient to operate.
Thirdly, the rotary assembly structure of the protective cover provided by
the disclosure, wherein the clamping platform is a triangle or a trapezoid,
preferably a right triangle or a right trapezoid, having a side with the smallest
slope or a waist line being able to be fitted with the clamping platform matching
surface reliably, so that position limitation is more steadier.
Fourthly, the rotary assembly structure of the protective cover provided by
the disclosure further comprises the slope boss locating mechanism for limiting
the outward movement of the protective cover in the X direction after the
protective cover is installed on the housing so that the protective cover is fixed
more stably and reliably.
Fifthly, the contactor provided by the disclosure has the rotary assembly
structure of the disclosure. The protective cover can be installed on the
housing reliably and stably, thereby forming stable and reliable matching and
implementing excellent phase-to-phase insulating performance. In addition, a
boss on a housing and a square hole on a protective cover in the prior art are
cancelled, and the notch structure is designed, thereby rising the calculating
point of the shortest electric leakage path of the housing, more easily allowing
the shortest electric leakage path to satisfy a product requirement and bringing
7
convenience for a miniaturized design of the product.
Brief description of the drawings
The disclosure will be further expounded hereinafter according to specific
embodiments of the disclosure and in conjunction with the accompanying
drawings so as to make the content of the disclosure clearly understood more
easily, wherein
Fig. 1 is a side sectional view of a housing of a contactor in the prior art;
Fig. 2 is a side sectional view of a protective cover of a contactor in the
prior art;
Fig. 3 is a schematic diagram of a housing of a contactor matched and
installed with a protective cover in the prior art;
Fig. 4 is a side sectional view of a housing of a contactor in the disclosure;
Fig. 5 is a side sectional view of a protective cover of a contactor in the
disclosure;
Fig. 6 is the first stereoscopic schematic diagram of a protective cover of a
contactor in the disclosure;
Fig. 7 is the second stereoscopic schematic diagram of a protective cover
of a contactor in the disclosure;
Fig. 8 is a schematic diagram of a housing and related components before
assembly of the housing of a contactor and a protective cover in the
disclosure;
Fig. 9 is the first schematic diagram of a matching and installing process
of a housing of a contactor and a protective cover in the disclosure;
Fig. 10 is the second schematic diagram of a matching and installing
process of a housing of a contactor and a protective cover in the disclosure;
and
Fig. 11 is a schematic diagram of a contactor housing matched and
installed with a protective cover in the disclosure.
Numerals in the accompanying drawings:
8
1-Housing; 11-lnsulating blocking wall; 12-Boss; 13-slope groove;
14-Corner; 15-Clamping platform matching surface;
2-Protective cover; 21-First protective wall; 211-Plug slot; 212-Square
hole; 213-slope boss; 22-Side wall; 23-Second protective wall; 24- Third
protective wall; 25-Clamping platform; 26-Connecting plate;
3-Tile-shaped wiring screw;
4-Contact plate;
5-Step; 51-First step matching surface; 511-First step matching inclined
plane;
6-Phase-to-phase insulation wall; 61-Second step matching surface;
611-Second step matching inclined plane;
7-Notch structure; 71-Notch corner point.
Detailed description of the embodiments
The specific embodiments of the disclosure will be expounded below in
conjunction with the accompanying drawings. It should be understood that the
specific embodiments described herein are only configured for describing and
explaining the disclosure, instead of limiting the disclosure.
A rotary assembly structure of protective cover of the disclosure is
configured to install a protective cover 2 on a housing 1, as shown in Fig. 4 and
Fig. 5.
The housing 1 comprises a plurality of insulating blocking walls 11
provided at an evenly interval. An energized conductor of one phase is
provided between two adjacent insulating blocking walls 11. A certain gap is
reserved between the energized conductor and the two adjacent insulating
blocking walls 11. A contactor in the present embodiment is a contactor with
energized conductors with four phases. The energized conductor consists of a
tile-shaped wiring screw 3, a contact plate 4, a lead and so on.
The protective cover 2 is an integral structure installed above the
energized conductor, and comprises a plurality of side walls 22 which are
9
matched with the insulating blocking walls 11 and provided at an evenly
interval. As many first protective walls 21 as the energized conductors are
shaped on the protective cover 2 at an outward side of the energized
conductor of each phase, so as to prevent an electric shock on a user during
an operation and ensure use safety. A plurality of plug slots 211 for inserting
the insulating blocking walls 11 are shaped on the first protective walls 21. The
top of the protective cover 2 is a third protective wall 23. The first protective
walls 21 and the third protective wall 23 are connected integrally by a
connecting plate 26. The connecting plate 26 may be a plate with round corner
or a plate with inclined plane.
In the present embodiment, the rotary assembly structure comprises an
inclined plane limiting mechanism, a clamping platform locating mechanism
and an slope boss locating mechanism.
The inclined plane limiting mechanism comprise a first step matching
inclined plane 511 provided on the insulating blocking walls 11 and a second
step matching inclined plane 611 provided on the side walls 22 and matched
with the first step matching inclined plane 511. The first step matching inclined
plane 511 and the second step matching inclined plane 611 are planes with a
certain width and a certain length.
A step 5 protruding on a plane where at least one of the insulating
blocking walls 11 locate is formed on at least one side face of at least one of
the insulating blocking walls 11 close to the energized conductor; a connection
surface of a plane where the step 5 locates and a plane where the
corresponding insulating blocking walls 11 locate is a first step matching
surface 51, and at least one part of the first step matching surface 51 obliquely
extends from inner to outside in a direction away from the energized conductor
to form the first step matching inclined plane 511.
As shown in Fig. 6 and Fig. 7, phase-to-phase insulation walls 6 are
provided on the side walls 22; a plane where at least one of the
phase-to-phase insulation walls 6 locate protrudes on a plane where one of the
10
corresponding side wall 22 locates; a connection surface of a plane where a
phase-to-phase insulation wall 6 locates and a plane where one of the
corresponding side wall 22 locates is a second step matching surface 61; at
least one part of the second step matching surface 61 obliquely extends from
inner to outside in a direction away from the energized conductor to form the
second step matching inclined plane 611; the second step matching inclined
plane 611 can be adapted for matching with the first step matching inclined
plane 511 in a contact manner to form the inclined plane limiting mechanism,
so as to limit an upward movement of the protective cover 2 in a Y direction
after the protective cover 2 is installed on the housing 1.
The clamping platform locating mechanism is configured to further limit
the upward movement of the protective cover 2 in the Y direction after the
protective cover 2 is installed on the housing 1. The clamping platform locating
mechanism comprises a clamping platform 25 and a clamping platform
matching surface 15. The clamping platform 25 is provided on an upper part of
at least one third protective wall 24 of the protective cover 2. In the present
embodiment, the clamping platform 25 is a trapezoid with a longer waist line
provided close to the energized conductor, and a upper line provided at a
location away from a first protective wall 21 of the protective cover 2. The
clamping platform matching surface 15 is a lower surface of a top plate of the
housing 1, and matched with a shorter waist line of the clamping platform 25.
In the present embodiment, the clamping platform 25 is a right trapezoid.
The boss locating mechanism is configured to limit an outward movement
of the protective cover 2 in an X direction after the protective cover 2 installed
on the housing 1. The slope boss locating mechanism comprises a slope
groove 13, and a slope boss 213. The slope groove 13 is shaped on the top of
at least one of the insulation walls 11. The slope boss 213 is matched with the
slope groove 13, and provided on a location on a second protective wall 23 on
the top of the protective cover 2 away from the first protective wall 21 of the
protective cover 2.
11
In the present embodiment, the slope groove 13 and the slope boss 213
are matched trapezoids having longer waist line provided close to the first
protective wall 21. Preferably, the slope groove 13 and the slope boss 213 are
right trapezoids.
A contactor having the rotary assembly structure of protective cover of the
disclosure comprises the housing 1 and the protective cover 2 installed on the
housing 1 through the rotary assembly structure of protective cover. A notch
structure 7 is shaped on an outward edge of the insulating blocking walls 11 of
the housing 1 and close to the installation location of the protective cover, so
as to form a shortest electric leakage path starting from a position of the
outermost end of an edge of the energized conductor, rectilinearly creeping
along the surfaces of phase-to-phase insulation walls 22, and then turning to
creep along the first protective wall 21 of the protective cover 2 or the surfaces
of the insulating blocking walls 11 to a notch corner point 71 of the notch
mechanism 7.
As shown in Fig. 5 and Fig. 8, it is necessary to prevent assembling
interference between an upper surface of the tile-shaped wiring screw 3 and a
face I of the protective cover 2, between a face F of the housing 1 and a face II
of the protective cover 2, and between the first step matching inclined plane
511 of the housing 1 and a face III of the protective cover 2 before assembly,
while a face E of the housing 1 is assembled with a face a of the protective
cover 2 in an interference manner, and after the clamping platform matching
surface 15 of the housing 1 is assembled with a face b of the protective cover 2
to form the clamping platform locating mechanism.
Fig. 9-11 shows a process of installing the protective cover 2 on the
housing 1. During assembly, the protective cover 2 is placed obliquely first,
and then rotated inwards (in an N direction as shown in Fig. 10) so that the
third protective wall 24 of the protective cover 2 is inserted into a gap behind
the tile-shape wiring screw 3, and the protective cover 2 is pushed inwards (in
an M direction as shown in Fig. 10) so that the second step matching inclined
12
plane 611 is pressed against the first step matching inclined plane 511, thereby
clamping the clamping platform 25 into the clamping platform matching surface
15, and the installation of the protective cover 2 is completed at this point.
After the assembly, a degree of freedom of the protective cover 2 in the X
direction is locked fixation by a face G of the slope groove 12 and a face J of
the insulating blocking walls 11 while a degree of freedom of the protective
cover 2 in the Y direction is locked fixation by a face H and a face I (the first
step matching inclined plane 511) of the insulating blocking walls 11. In
addition, a face K (the clamping platform matching surface 15) and the
clamping platform 25 are matched to further enhance constraint on an outward
rotation (in a clockwise direction in Fig. 11) of the protective cover 2. After the
assembly, the shortest electric leakage path S2 from the position of the
outmost edge of the energized conductor of the tile-shape wiring screw 3 to the
position of the notch corner point 71 of the housing 1 is longer compared with
the prior art.
In other embodiments, the clamping platform 25 may be also a triangle. A
side with the smallest slope of the clamping platform 25 is matched with the
clamping platform matching surface 15. Similarly, the slope groove 13 and the
slope boss 213 may be also matched triangles.
Obviously, the above embodiments are merely configured for clearly
describing the examples rather than limiting the embodiments. For those of
ordinary skills in the art, changes or variations in other different forms may be
also made on the basis of the above description. It is unnecessary and unable
to exhaust all embodiments herein, and obvious changes or variations derived
thereby still fall in the scope of protection of the disclosure.
13

What is claimed is:
1. A rotary assembly structure of a protective cover, configured to install
the protective cover (2) on a housing (1);
the housing (1) comprises a plurality of insulating blocking walls (11)
provided at an evenly interval, and an energized conductor is provided
between two adjacent insulating blocking walls (11);
the protective cover (2) comprises a plurality of side walls (22) which are
matched with the insulating blocking walls (11) and provided at an evenly
interval;
wherein the rotary assembly structure comprises an inclined plane limiting
mechanism; the inclined plane limiting mechanism comprises a first step
matching inclined plane (511) provided on the insulating blocking walls (11)
and a second step matching inclined plane (611) provided on the side walls (22)
and matched with the first step matching inclined plane (511).
a step (5) protruding on a plane where at least one of the insulating
blocking walls (11) locate is formed on at least one side face of at least one of
the insulating blocking walls (11) close to the energized conductor; a
connection surface of a plane where the step (5) locates and a plane where
the corresponding insulating blocking wall (11) locates is a first step matching
surface (51), and at least one part of the first step matching surface (51)
obliquely extends from inner to outside in a direction away from the energized
conductor to form the first step matching inclined plane (511);
phase-to-phase insulation walls (6) are provided on the side walls (22); a
plane where at least one of the phase-to-phase insulation walls (6) locate
protrudes on a plane where one of the corresponding side wall (22) locates; a
connection surface of a plane where a phase-to-phase insulation wall (6)
locates and a plane where one of the corresponding side wall (22) locates is a
second step matching surface (61); at least one part of the second step
matching surface (61) obliquely extends from inner to outside in a direction
away from the energized conductor to form the second step matching inclined
14
plane (611); the second step matching inclined plane (611) can be adapted for
matching with the first step matching inclined plane (511) in a contact manner
to form the inclined plane limiting mechanism, so as to limit an upward
movement of the protective cover (2) in a Y direction after the protective cover
(2) is installed on the housing (1).
2. The rotary assembly structure of the protective cover according to claim
1, wherein it further comprises a clamping platform locating mechanism
configured to further limit the upward movement of the protective cover (2) in
the Y direction after the protective cover (2) is installed on the housing (1); and
comprising:
a clamping platform (25) provided on an upper part of at least one third
protective wall (24) of the protective cover (2);
a clamping platform matching surface (15), which is a lower surface of a
top plate of the housing (1), and matched with the clamping platform (25) to
prevent the clamping platform (25) from being separated.
3. The rotary assembly structure of the protective cover according to claim
2, wherein the clamping platform (25) is a trapezoid with a longer waist line
provided close to the energized conductor, and a upper line provided at a
location away from a first protective wall (21) of the protective cover (2); the
clamping platform matching surface (15) is matched with a shorter waist line of
the clamping platform (25).
4. The rotary assembly structure of the protective cover according to claim
2, wherein the clamping platform (25) is a triangle, and a side having the
smallest slope of the clamping platform (25) is matched with the clamping
platform matching surface (15).
5. The rotary assembly structure of the protective cover according to any
one of claims 1 to 4, wherein it further comprises a slope boss locating
mechanism; the slope boss locating mechanism is configured to limit an
outward movement of the protective cover (2) in an X direction after the
protective cover (2) is installed on the housing (1), and comprising:
15
a slope groove (13), shaped on the top of at least one of the insulation
walls (11);
a slope boss (213), matched with the slope groove (13), and provided on a
location on a second protective wall (23) on the top of the protective cover (2)
away from a first protective wall (21) of the protective cover (2).
6. The rotary assembly structure of the protective cover according to claim
5, wherein the slope groove (13) and the slope boss (213) are matched
trapezoids having longer waist line provided close to the first protective wall
(21 ).
7. The rotary assembly structure of the protective cover according to claim
5, wherein the slope groove (13) and the slope boss (213) are matched
triangles.
8. A contactor applying the rotary assembly structure of the protective
cover according to anyone of claims 1 to 7, wherein it comprises the housing
(1) and the protective cover (2) installed on the housing (1) through the rotary
assembly structure.
9. The contactor according to claim 8, wherein a notch structure (7) is
shaped on an outward edge of the insulating blocking walls (11) and close to
the installation location of the protective cover, so as to form a shortest electric
leakage path starting from a position of the outermost end of an edge of the
energized conductor, rectilinearly creeping along surfaces of phase-to-phase
insulation walls (22), and then turning to creep along the surfaces of a first
protective wall (21) of the protective cover (2) or the insulating blocking walls
(11) to a notch corner point (71) of the notch mechanism (7).
10. The contactor according to claim 8 or 9, wherein the rotary assembly.