FORM 2
THE PATENTS ACT 1970
(39 of 1970)
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. OPERATING MECHANISM OF ROTARY SWITCH
2.
1. (A) SHANGHAI LIANGXIN ELECTRICAL CO., LTD
(B) China
(C) No.2000 South ShenJiang Road, Pudong New District, Shanghai 201315,
China
5
The following specification particularly describes the invention and the manner in which it is to be
performed.
2
5 Technical Field
The present invention belongs to the field of switch technologies, and specifically, the
present invention relates to an operating mechanism of a rotary switch.
Related Art
The word switch is explained as switch on and switch off. It refers to an element that can
10 open a circuit, interrupt a current, or cause it to flow to other circuits. The most common
switch is an electromechanical device operated by a person, and there are one or more
contacts in the switch. A contact being "closed" indicates that the contact is conducted, and
current is allowed to flow; and a contact being "open" indicates that the contact is not
conducted an open circuit is formed, and current is not allowed to flow. The development
15 history of the switch has evolved from the original knife switch that requires manual
operation to the current intelligent switch that is applied to various large-scale electrical
control devices. More functions of a switch indicate higher security. A rotary switch is a
common switch that prevents, by locking a rotary operator at a specific position
corresponding to a specific state of a rotary operation apparatus, the rotary operation
20 apparatus from being operated in an unauthorized manner. However, if the rotary operator is
locked at a safe position and an operation part of the rotary operation apparatus is not in the
corresponding desired state, a dangerous situation may occur. For example, in some rotary
electrical switches having a fixed electrical contact and a rotary electrical contact that is
mounted onto a shaft, the contacts have been welded together in a "connected" state, but the
25 rotary operator can still be rotated by using torsion of the shaft, and the rotary operator is
locked at a position corresponding to a disconnected state. Therefore, the switch appears to be
"disconnected", but in fact the circuit is still "connected". Other types of rotary operation
apparatuses and rotary valves also have similar cases, where the actual position of an
operated object does not correspond to the object position indicated by the position of the
30 operator.
To avoid cases in which a displayed position is in consistent with an actual on-off state
of a circuit in the foregoing operating mechanism of a rotary switch, currently, in a lot of
switches, the actual position of a rotary device is locked, to limit the unstable condition of the
switch operating mechanism. For example, the Chinese patent CN 101901021 A discloses a
35 rotary operator assembly, including a grip member, a spindle member, and an operator body
member. The spindle member is attached to the operator body member, being rotatable with
3
respect to the operator body member about an operative axis 5 of rotation. The grip member is
movably coupled to the spindle member and the operator body member and is translatable
between a first translational position and a second translational position with respect to the
operator body member. The grip member and the operator body member include cooperating
means for blocking rotation of the grip member with respect to the operator body member
10 about the operative axis of rotation in the first position and for allowing rotation of the grip
member with respect to the operator body member about the operative axis of rotation in the
second position from a first angular position to a second angular position. The grip member is
configured to operably couple with the spindle member in at least the second translational
position, and the grip member includes at least one portion cooperating with at least one
15 portion of the spindle member for preventing translation of the grip member between the first
translational position and the second translational position in the first angular position. The
rotary device has a function of locking an actual position of a rotary mechanism, but the
locking is completed by additionally adding a corresponding locking mechanism, and
consequently, the volume and production costs of products are increased, and the locking
20 functional component is associated with an opening/closing component, and this is
disadvantageous to maintenance and replacement.
SUMMARY
The objective of the present invention is to provide an operating mechanism of a rotary
switch with respect to the technical defect that an actual position locking mechanism of an
25 existing operating mechanism of a rotary switch needs to be separately disposed, so that an
actual position locking mechanism of the operating mechanism of a rotary switch is directly
implemented by changing the structural shape of the rotary switch, the volume of the rotary
switch is reduced, and production costs of the rotary switch are reduced.
Technical solutions
30 To achieve the foregoing technical objective, the present invention designs an operating
mechanism of a rotary switch, where the operating mechanism includes an upper cover, a
mounting base, a lever, a spring, and a rotation shaft; the rotation shaft is mounted in a
rotation shaft mounting groove of the mounting base, and can rotate in the rotation shaft
mounting groove; the spring is mounted in a groove of an inner cavity of the rotation shaft;
35 an end portion of the spring abuts against a stopper in the groove; an upper end surface of the
rotation shaft is provided with an open slot; an outer surface of the rotation shaft
4
corresponding to two side surfaces of the open slot is provided 5 with a notch elongated slot
hole; a pawl protrudes from a notch of the open slot; the pawl can be blocked by a limiting
protruding block extending from an inner side surface of the upper cover in a rotation process
of the rotation shaft; the lever includes a lever handle and a lever disk; a drive finger extends
from a lower surface of the lever disk, and is inserted into the groove of the inner cavity of
10 the rotation shaft; an outer edge surface of the lever disk is provided with a convex wall, and
the lever handle extends out of a through hole of the upper cover and is inserted into a handle.
Further, the lever can rotate under driving of the handle, and in a rotation process, the
convex wall can press the pawl to retract towards the notch elongated slot hole.
Further, the upper cover and the mounting base are fixed together.
15 Further, there are two springs mounted in the inner cavity of the rotation shaft to
constitute an arc-shaped spring, the stopper includes a front stopper and a rear stopper, and
front and rear ends of the two springs respectively abut against the front stopper and the rear
stopper.
Further, the pawl is provided with a guide bevel, and the convex wall can press the pawl
20 along the guide bevel.
Further, there are two drive fingers separately inserted into the arc groove in which the
two springs are located.
Beneficial effects
According to an operating mechanism of a rotary switch provided in the present
25 invention, an actual position locking mechanism of the operating mechanism of a rotary
switch is directly implemented by changing the structural shape of the rotary switch, so that
the volume of the rotary switch is reduced, and production costs of the rotary switch are
reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
30 FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic exploded view of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pawl locking structure in an embodiment of the
present invention;
FIG. 4 is a schematic structural diagram of a mounting base in an embodiment of the
5
5 present invention;
FIG. 5 is a schematic structural diagram of an upper cover in an embodiment of the
present invention;
FIG. 6 is a schematic structural diagram of a lever in an embodiment of the present
invention;
10 FIG. 7 is a front view of a lever in an embodiment of the present invention;
FIG. 8 is a left view of a lever in an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a rotation shaft in an embodiment of the
present invention;
FIG. 10 is a front view of a rotation shaft in an embodiment of the present invention; and
15 FIG. 11 is a schematic structural diagram of a handle in an embodiment of the present
invention.
DETAILED DESCRIPTION
The present invention is described in detail below with reference to the accompanying
drawings and embodiments.
20 Embodiments
As shown in FIG. 1 and FIG. 2, an operating mechanism of a rotary switch provided in
the present invention includes an upper cover 1, a mounting base 2, a lever 3, a spring 4, and
a rotation shaft 5. The upper cover 1 and the mounting base 2 are fixed together. Referring to
FIG. 3 and FIG. 4, the rotation shaft 5 is mounted in a rotation shaft mounting groove 201 of
25 the mounting base 2, and can rotate in the rotation shaft mounting groove 201.
Next, referring to FIG. 2 and FIG. 9, the spring 4 is mounted in a groove 501 of an inner
cavity of the rotation shaft 5; an end portion of the spring 4 abuts against a stopper 501a in
the groove 501; an upper end surface of the rotation shaft 5 is provided with an open slot 502;
an outer surface of the rotation shaft 5 corresponding to two side surfaces of the open slot 502
30 is provided with a horizontally arranged notch elongated slot hole 503; and a pawl 502a
protrudes from a notch of the open slot 502. The pawl 502a can be blocked by a limiting
protruding block 101 extending from an inner side surface of the upper cover 1 in a rotation
process of the rotation shaft 5 (referring to FIG. 3 and FIG. 5). A gap of the notch elongated
slot hole 503 can make the pawl 502a generate a displacement downwards and retract
6
downwards when the pawl 502a is 5 pressed by downward pressure.
Referring to FIG. 6 and FIG. 7, the lever 3 includes a lever handle 301 and a lever disk
302; a drive finger 302a extends from a lower surface of the lever disk 302, and can be
inserted into the corresponding groove 501 of the inner cavity of the rotation shaft 5; an outer
edge surface of the lever disk 302 is provided with a convex wall 302b, and the lever handle
10 301 extends out of a through hole of the upper cover 1 and is inserted into a handle 6. In this
embodiment, two convex walls 302b are disposed, and are respectively arranged on two sides
of the open slot 502, so that the lever 3 can slide along a guide bevel 502a01 on the pawl
502a when rotating relative to the rotation shaft 5 and further press the pawl 502a to retract
towards the notch elongated slot hole 503.
15 In this embodiment, there are two springs 4 mounted in the inner cavity of the rotation
shaft 5 to constitute an arc-shaped spring; moreover, the stopper 501a includes a front stopper
501a01 and a rear stopper 501a02, and front and rear ends of the two springs 4 respectively
abut against the front stopper 501a01 and the rear stopper 501a02 (referring to FIG. 9). The
number of drive fingers 302a is also two, and the two drive fingers 302a are separately
20 inserted into the arc groove 501 in which the two springs 4 are located (referring to FIG. 6
and FIG. 8), so that the lever 3 toggles (drives) the rotation shaft 5 to rotate together during
rotation of the lever 3.
The working process of the present invention is: the handle 6 drives the lever 3 to rotate;
a lower end of the lever 3 is connected to an execution mechanism of a switch by using the
25 rotation shaft 5 and a through hole on the mounting base 2; in a rotation process of the lever 3,
the convex wall 302b can press, along the guide bevel 502a01 on the pawl 502a, the pawl
502a to retract towards the notch elongated slot hole 503, and in this way, the pawl 502a is
unlocked from a state of being blocked by the limiting protruding block 101, and the lever 3
rotates and compresses the spring 4. After the lever 3 rotates to a specified position, the
30 rotation shaft 5 rotates under the effect of the compressed compression spring 4, and the pawl
502a is blocked by the limiting protruding block 101 again, to implement position locking.
According to an operating mechanism of a rotary switch provided in the present
invention, an actual position locking mechanism of the operating mechanism of a rotary
switch is directly implemented by changing the structural shape of the rotary switch, so that
35 the volume of the rotary switch is reduced, and production costs of the rotary switch are
reduced.
7
The structures, the proportions, the sizes, and the like 5 drawn in the drawings of this
embodiment are only used to clarify the content disclosed in the specification for
understanding and reading by those skilled in the art, and are not intended to limit the
limiting condition for implementation of the present invention, and therefore do not have
technical substantive significance. Any structural modification, proportional relationship
10 change or size adjustment, without affecting the effects that can be generated by the present
invention and the objectives that can be achieved by the present invention, should still fall
within the scope of the technical content disclosed in the present invention. In addition, the
terms such as "upper", "lower", "left", "right", "intermediate", "clockwise",
"counterclockwise" as cited in this specification are also for clarity of description, and are not
15 intended to limit the implementation scope of the present invention. The change or
adjustment of the relative relationship, without substantively changed technical content,
should also be considered to fall within the implementation scope of the present invention.
8
5 WE CLAIM:
1. An operating mechanism of a rotary switch, wherein the operating mechanism
comprises an upper cover (1), a mounting base (2), a lever (3), a spring (4), and a rotation
shaft (5); the rotation shaft (5) is mounted in a rotation shaft mounting groove (201) of the
mounting base (2), and can rotate in the rotation shaft mounting groove (201); the spring (4)
10 is mounted in a groove (501) of an inner cavity of the rotation shaft (5); an end portion of the
spring (4) abuts against a stopper (501a) in the groove (501); an upper end surface of the
rotation shaft (5) is provided with an open slot (502); an outer surface of the rotation shaft (5)
corresponding to two side surfaces of the open slot (502) is provided with a notch elongated
slot hole (503); a pawl (502a) protrudes from a notch of the open slot (502); the pawl (502a)
15 can be blocked by a limiting protruding block (101) extending from an inner side surface of
the upper cover (1) in a rotation process of the rotation shaft (5); the lever (3) comprises a
lever handle (301) and a lever disk (302); a drive finger (302a) extends from a lower surface
of the lever disk (302), and is inserted into the groove (501) of the inner cavity of the rotation
shaft (5); an outer edge surface of the lever disk (302) is provided with a convex wall (302b),
20 and the lever handle (301) extends out of a through hole of the upper cover (1) and is inserted
into a handle (6).
2. The operating mechanism of a rotary switch according to claim 1, wherein the lever
(3) can rotate under driving of the handle (6), and in a rotation process, the convex wall (302b)
can press the pawl (502a) to retract towards the notch elongated slot hole (503).
25 3. The operating mechanism of a rotary switch according to claim 1, wherein the upper
cover (1) and the mounting base (2) are fixed together.
4. The operating mechanism of a rotary switch according to claim 1, wherein there are
two springs (4) mounted in the inner cavity of the rotation shaft (5) to constitute an
arc-shaped spring, the stopper (501a) comprises a front stopper (501a01) and a rear stopper
30 (501a02), and front and rear ends of the two springs (4) respectively abut against the front
stopper (501a01) and the rear stopper (501a02).
5. The operating mechanism of a rotary switch according to claim 1, wherein the pawl
(502a) is provided with a guide bevel (502a01), and the convex wall (302b) can press the
pawl (502a) along the guide bevel (502a01).
35 6. The operating mechanism of a rotary switch according to claim 1, wherein there are
two drive fingers (302a) separately inserted into the arc groove (501) in which the two
springs (4) are located.