FIELD OF THE INVENTION AND RELATED ART STATEMENT
1. FIELD OF THE INVENTION
[0001] The present invention relates generally to a switch for use in an electronics apparatus,
and more particularly to a switch which is suitable for mounting on a printed circuit
board.
2. DESCRIPTION OF THE RELATED ART
[0002] A conventional switch is described with reference to FIG.17 and FIG.18. A fixed terminal
2 having a contact 10A and a moving member terminal 3 supporting a moving switch-plate
6 are inserted in respective openings of a switch case 1 made of electrical insulating
material such as synthetic resin. An upper supporting part 3A and a lower supporting
part 3B are formed on an inner wall of a recess formed in an upper portion of the
moving member terminal 3 in FIG.17. A slide member 7 made of electrical insulating
material such as synthetic resin is arranged at an upper portion of the switch case
1 so as to be movable in the direction of an arrow M. The moving switch-plate 6 is
engaged with a slot 7A of the slide member 7 at an upper end part 6A. A contact 10B
which contacts a contact rest part 3C of the moving member terminal 3 is fixed on
a lower end part 6B of the moving switch-plate 6.
[0003] In FIG.17 and FIG.18, an upper end part of a V-shaped leaf spring 5 is engaged with
the moving switch-plate 6 at an engaging point (B), and a lower end part thereof is
engaged with the lower supporting part 3B of the moving member terminal 3. An upper
end part of an L-shaped change-over member 4 is engaged with the upper supporting
part 3A of the moving member terminal 3 at another engaging point or fix point (C),
and a lower end part thereof is engaged with the moving switch-plate 6 at another
engaging point (A).
[0004] A compression coil spring 9 is provided between the switch case 1 and a flange 7B
of the slide member 7 so as to keep depressing force on the flange 7B in the direction
of an arrow L. The upper opening of the switch case 1 is covered by a cover 8 made
of a metal plate. The switch is mounted on a printed circuit board 25 by inserting
the fixed terminal 2 and the moving member terminal 3 into openings of the printed
circuit board 25, and then soldering the terminals 2 and 3 to respective conductive
layers on the printed circuit board 25.
[0005] Operation of the above-mentioned switch is described with reference to schematic
diagrams in FIG.18A, FIG.18B and FIG.18C of the moving elements of the moving switch-plate
6, leaf spring 5 and change-over member 4. FIG.18A shows the OFF-state of the switch.
When the slide member 7 is moved in the direction of arrow M by pressing a push rod
7C as shown in FIG.17, the moving switch-plate 6 is rotated counterclockwise and the
moving switch-plate 6 represented by a line connecting between the engaging points
A and B is moved in the direction of arrow N and brought close to the engaging point
C as shown in FIG.18A. In FIG.18B, the moving switch-plate 6 is on the engaging point
C. The slide member 7 is further moved in the direction of arrow M, and when the moving
switch-plate 6 has passed the engaging point C as shown in FIG.18C, the moving switch-plate
6 is rapidly moved to the direction of the arrow N and the contact 10B contacts the
contact 10A of the fixed terminal 2, and the switch is closed.
[0006] In the above-mentioned conventional switch, the moving switch-plate 6 is vertically
arranged with respect to the surface of the printed circuit board 25. Therefore, a
size between a bottom face having the fixed terminal 2 and that between moving member
terminal 3 and the cover 8 is large. Thus, there is a disadvantage that a height of
the switch from the surface of the printed circuit board 25 is large.
OBJECT AND SUMMARY OF THE INVENTION
[0007] In order to solve the above-mentioned disadvantage, in the present invention, the
moving member terminal takes the form of an L-shaped profile, and a moving switch-plate,
a leaf spring and a change-over member are horizontally arranged substantially parallel
to the bottom face of a switch case.
[0008] A switch of a first mode comprises
a fixed terminal having a fixed contact on one end part and a wiring part to be
connected to an external circuit on the other end part,
a moving member terminal made of an L-shaped member for holding a moving switch-plate
having a moving contact contacting to the fixed contact having a wiring part to be
connected to an external circuit at one end part of the L-shaped member, and having
a first projection part at the other end part of the L-shaped member and a recess
portion formed at the base portion of the first projection part,
a switch case for holding the fixed terminal and the moving member terminal so
that the fixed terminal is electrically insulated from the moving member terminal
and the wiring parts of the fixed terminal and the moving member terminal to be connected
to respective external circuits are protruded from the same wall of the switch case,
a leaf spring engaged with a second supporting recess in the recess portion formed
on the moving member terminal at one end part, and inserted with the first projection
part of the moving member terminal in a slit formed in a central portion,
a change-over member engaged at one end with a first supporting recess formed on
an opposite position to the second supporting recess in the recess portion of the
moving member terminal 13,
a moving switch-plate having the moving contact at one end part and a slit in a
central portion, arranged substantially parallel to a face of the switch case for
supporting the fixed terminal and said moving member terminal so as to protrude outward
the wiring parts to be connected to external circuits, engaged rotatably with the
other end of the leaf spring at an end part apart from the moving contact, and engaged
rotatably with the other end of the change-over member at an end part of the slit
adjacent to the moving contact, and
a slide member slidably arranged in the switch case and engaged with an end part
of the moving switch-plate.
[0009] In a switch of a second mode, a bent part to which the first projection part contacts
when the moving contact is remote from the fixed contact is formed at an end part
of a slit of the leaf spring.
[0010] In a switch of a third mode, the moving switch-plate comprises hook parts at an end
part of the slit adjacent to the moving contact, and the end parts of the change-over
member are engaged with the hook parts.
[0011] In a switch of a fourth mode, the moving member terminal comprises a third projection
part to be inserted to the slit of the change-over member on the recess portion of
the moving member terminal.
[0012] In a switch of a fifth mode, two switch units each of which comprises the moving
member terminal, change-over member, leaf spring and moving switch-plate are assembled
in one switch case, and two switch units are engaged with the slide member so that
both the switch units are operated at the same time.
[0013] According to the present invention, the moving member terminal takes the form of
the L-shaped profile, and the moving switch-plate, the leaf spring and the change-over
member are horizontally arranged with respect the bottom face of the switch case.
Therefore, the height of the switch can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014]
FIG. 1 is an exploded perspective assembly view of a first embodiment of the switch
in accordance with the present inventions;
FIG.2A is an exploded perspective assembly view of relevant parts of the first embodiment;
FIG.2B is a perspective assembly view of the relevant parts in FIG.2A;
FIG.3A is a fragmentary cross-sectional plan view of the switch in the first embodiment;
FIG.3B is a fragmentary cross-sectional side view of the switch in the first embodiment;
FIG.4A, FIG.4B, FIG.4C are schematic diagrams representing operation of the switch
of the first embodiment;
FIG.5A is an exploded perspective assembly view of relevant parts of a second embodiment
of the switch in accordance with the present invention;
FIG.5B is a perspective assembly view of the relevant parts of the second embodiment;
FIG.6 is a fragmentary cross-sectional plan view of the switch of the second embodiment
in ON-state;
FIG.7 is a fragmentary cross-sectional plan view of the switch in the second embodiment
in OFF-state;
FIG.8A is an exploded perspective assembly view of relevant parts of a third embodiment
of the switch in accordance with the present invention;
FIG.8B is a perspective assembly view of the relevant parts of the third embodiment;
FIG.9A is a view a moving switch-plate and a change-over member in the third embodiment;
FIG.9B is an assembly view of the moving switch-plate and the change-over member in
the third embodiment;
FIG.10 is a fragmentary cross-sectional plan view of the switch in the third embodiment;
FIG.11 is an assembly view of a moving switch-plate and a change-over member;
FIG.12 is an exploded assembly view of the change-over member and a moving member
terminal;
FIG.13 is an assembly view of the moving switch-plate, the change-over member and
the moving member terminal;
FIG.14 is an exploded assembly view of the moving switch-plate and a leaf spring;
FIG.15 is an assembly view of the moving switch-plate and the leaf spring;
FIG.16 is an assembly view in which the moving switch-plate is moved to mount in the
switch case;
FIG.17 is the cross-sectional side view of the switch in the prior art;
FIG.18A, FIG.18B and FIG.18C are schematic diagrams representing operation of the
switch in the prior art.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[first embodiment]
[0015] The switch of the first embodiment in accordance with the present invention is described
with reference to FIG.1, FIG.2A, FIG.2B, FIG.3A, FIG.3B, FIG.4A, FIG.4B and FIG.4C.
In FIG.1, two switch units 40 are assembled in one switch case 11, and a switch having
two circuits is illustrated. The switch unit 40 is defined by an assembled mechanism
as shown by FIG.2B of which four elements as shown in FIG.2A are assembled. The two
switch units 40 are identical with each other in configuration and operation. Therefore,
in the description hereafter, the description with respect to one of the switch units
is applicable to the other switch unit.
[0016] Referring to FIG.1, the switch case 11 made of electrical insulating material such
as synthetic resin comprises two oblong openings 11B and two oblong openings 11D in
the bottom plate 11C. A wiring part 12A of a fixed terminal 12 with a fixed contact
12A at an end part is inserted in the oblong opening 11B. The wiring part 12A is protruded
outward through the oblong opening 11B of the bottom plate 11, and is connected to
a conductive layer of a printed circuit board to mount the switch on the printed circuit
board, for example. A wiring part 13E formed on one end part of an L-shaped moving
member terminal 13 is inserted into the oblong opening 11. The wiring part 13E is
also connected to an conductive layer of the printed circuit board in a manner similar
to the wiring part 12A. Detailed configurations of the moving member terminal 13 and
other members to be mounted on the moving member terminal 13 are shown in FIG.2A.
[0017] A first projection part 11C and a second projection part 13G which is shorter than
first projection part 13C are provided on the other end portion of the L-shaped moving
member terminal 13, and a recess portion 13D is formed between the first projection
part 13C and the second projection part 13G. Two recesses which serve as the first
supporting recess 13A and a second supporting recess 13B respectively are formed at
opposite positions on the recess portion 13D.
[0018] A recess 15B formed at one end of a shallowly U-shape bent leaf spring 15 is engaged
with the second supporting recess 13B. Moreover, a recess 14A formed at one end of
a change-over member 14 is engaged with the first supporting recess 13A. The change-over
member 14 has a bifurcate or fork shape in which the end part having the recess 14A
is a joint, and the second projection part 13G of the moving member terminal 13 is
inserted in a slit 14C of the bifurcation.
[0019] The other end 15A of the leaf spring 15 is rotatably engaged with a recess 16A formed
on an end part of a slit 16D of a moving switch-plate 16. Notches 14B formed on the
end parts of the change-over member 14 are rotatably engaged with a cutout part 16B
formed at the other end part of the slit 16D of the moving switch-plate 16. Consequently,
the moving switch-plate 16 is arranged substantially parallel to the bottom plate
11C of the switch case 11. A moving contact 20B is mounted on an end part 16E of the
moving switch-plate 16.
[0020] Referring to FIG.1, FIG.3A and FIG.3B, the slide member 17 comprises a slot 17A to
be engaged with the end part 16C of the moving switch-plate 16, and can be moved in
the direction of arrow M in the switch case 11. A frame 18 covers an opening part
of the switch case 11 for holding the slide member 17 in the switch case 11. A coil
spring 19 is arranged in interior space 17E of the slide member 17 in a compressed
state, one end of the coil spring 19 is held by a spring pedestal 11A of the switch
case 11 and the other end thereof is held by a spring pedestal 17C of the slide member
17 in the interior space so as to bias the slide member 17 to the direction of arrow
N.
[0021] As shown in FIG.2B, in assembled state, positional shift of the change-over member
14 and the leaf spring 15 in the direction of arrow P is prevented by engaging the
recess 14A of the change-over member 14 with the first supporting recess 13A of the
moving member terminal 13 and inserting the first projection part 13C of the moving
member terminal 13 in a slit 15D of the leaf spring 15. The switch unit 40 is inserted
in the openings 11D (FIG.1) of the bottom plate 11C of the switch case 11 and the
switch is constructed.
[0022] Operation of the switch is described hereafter. Referring to FIG.3A, when the slide
member 17 is moved by pressing in the direction of an arrow M, the end part 16C of
the moving switch-plate 16 engaged with the slot 17A of the slide member 17A is moved
in the direction of the arrow M; and the moving contact 20B of the moving switch-plate
16 contacts the fixed contact 20A of the fixed terminal 12 and the switch becomes
ON-state.
[0023] The above-mentioned operation is described in further detail with reference to FIG.4A,
FIG.4B and FIG.4C. FIG.4A, FIG.4B and FIG.4C which schematically illustrate the change-over
member 14, leaf spring 15 and moving switch-plate 16 of the switch. An engaging point
(A) represents the engaging part between the notches 14B of the change-over member
14 and the cutout part 16B of the moving switch-plate 16. An engaging point (B) represents
the engaging part between the other end 15A of the leaf spring 15 and the recess 16A
of the moving switch-plate 16. Moreover, an engaging point (C) represents the engaging
part between the recess 14A of the change-over plate 14 and the first supporting recess
13A of the moving member terminal 13. The engaging points (A) and (B) move during
operation of the switch, while the engaging point (C) does not move during the operation.
[0024] FIG.4A shows the OFF-state of the switch. When the slide member 17 is moved in the
direction of arrow M, the moving switch-plate 16 represented by a straight line connecting
between the engaging points (A) and (B) is moved in the direction of the arrow M by
being pressed at the end part 16C by the slide member 17. The engaging point (A) is
rotated clockwise about the engaging point (C). Therefore, the moving switch-plate
16 is moved so as to compress the leaf spring 15.
[0025] FIG.4B shows the state that the moving switch-plate 16 is on the engaging point (C).
In this state, the leaf spring 15 is compressed to the utmost. The slide member 17
is further moved to the direction of the arrow M, and when the moving switch-plate
16 passes the engaging point (C) as shown in FIG.4C, the change-over member 14 is
rotated clockwise by an expanding force of the leaf spring 15. Consequently, the engaging
point (A) is rapidly rotated clockwise and the moving switch-plate 16 is moved in
the direction of the arrow M, and the moving contact 20B contacts the fixed contact
20A of the fixed terminal 12. The slide member 17 returns to the original position
by the expansion force of the coil spring 19 by releasing the slide member 17, and
the switch becomes OFF-state by reverse operation to the operation as mentioned above.
[0026] As shown in FIG.1 and FIG.3A, two moving switch-plates 16 having the same configuration
are simultaneously operated by the action of the slide member 17, and two switching
circuits simultaneously becomes ON-state or OFF-state.
[0027] In the above-mentioned embodiment, when the slide member 17 is pressed in the direction
of the arrow M, the switch becomes ON-state; and when the slide member 17 is released
,the switch becomes OFF-state. The switch can be configurated so that it alternately
becomes ON-state or OFF-state by each press of the slide member 17 by combining a
known lock-mechanism (not shown). Moreover, in the case that the coil spring 19 is
not mounted, the switch keeps ON-state by pressing the slide member 17, and keeps
OFF-state by pulling the slide member 17.
[0028] In the present invention as mentioned above, a thin type switch of which a size between
from the bottom plate 11C to the frame 18 is small is realized, since a substantially
L-shaped moving member terminal 13 is mounted in the switch case 11 and the moving
switch-plate 16, leaf spring 15 and change-over member 14 are arranged substantially
parallel to the bottom plate 11C of the switch case 11. As shown in FIG.1, FIG.3A
and FIG.3B, even if two or more switching units are incorporated in the switching
case 11, the size from the bottom plate 11C to the frame 18 does not increase. Therefore
the thin type switch having plural switching units is realizable.
[second embodiment]
[0029] The switch of the second embodiment of the present invention is described with reference
to FIG.5A, FIG.5B, FIG.6 and FIG.7. In the second embodiment, in the exploded assembly
perspective view of FIG.5A, only a moving member terminal 23 and a leaf spring 25
are different from those of in the first embodiment. Remaining elements are identical
with the corresponding elements in the first embodiment. Elements similar to the elements
in the first embodiment are identified by like reference numerals and the description
is omitted.
[0030] In the moving member terminal 23, a first projection part 23C of the moving member
terminal 23 is made shorter than the first projection part 13C of the moving member
terminal 13 as shown in FIG.2A, and other parts are made substantially similar to
the moving member terminal 13. Moreover, the leaf spring 25 has a bent part 25C at
an end part apart from the recess 15B in an oblong slit 25D formed from a part adjacent
to the recess 15B to the central part of the leaf spring 25. The bent part 25C is
bent to the inside of the U-shaped leaf spring 25. FIG.5B is an assembly diagram of
the switch unit in the second embodiment. Referring to FIG.5B, the first projection
part 23C of the moving member terminal 23 is inserted in the slit 25D of the leaf
spring 25.
[0031] Operation of the switch in the second embodiment is described with reference to FIG.6
and FIG.7. FIG.6 is a plan view of the switch in ON-state. The slide member 17 is
moved in the direction of arrow M, and the moving contact 20B of each moving switch-plate
26 contacts the fixed contact 20A. In this state, the first projection part 23C of
the moving member terminal 23 is inserted in the slit 25D of the leaf spring 25.
[0032] FIG.7 is a plan view of the switch in which the slide member 17 is moved in the direction
of arrow N and the switch is in OFF-state. The moving switch-plate 16 is moved in
the direction of arrow N by the movement of the slide member 17 and the moving contact
20B is removed from the fixed contact 20A. When the moving switch-plate 16 is moved
in the direction of arrow N, the leaf spring 25 rotates clockwise. Rotation of the
leaf spring 25 is suspended when the bent part 25C touches the first projection part
23C of the moving member terminal 23, and movement of the moving switch-plate 16 is
also suspended.
[0033] When the switch unit of the second embodiment in FIG.5B is compared with the switch
unit in the first embodiment, the first projection part 13C in FIG.2B is longer than
the first projection part 23C in FIG.5B, and the first projection part 13C is protruded
from the leaf spring 15. On the contrary, the first projection part 23C in FIG.5B
is placed at the same level of the face of the leaf spring 25. In the second embodiment,
since the bent part 25C of the leaf spring 25 is protruded inside of the U-shaped
leaf spring 25 and the first projection part 23C touches the bent part 25C, the first
projection part 23C is not needed to be so long as to protrude from the slit 25D of
the leaf spring 25. Since the first projection part 23C is shorter than the first
projection part 13C, the material to fabricate the moving member terminal 23 is reduced,
and the size of the switch is also reduced.
[third embodiment]
[0034] The switch of the third embodiment of the present invention is described with reference
to FIG.8A, FIG.8B, FIG.9A, FIG.9B and FIG.10. In the switch of the third embodiment,
as shown in FIG.8A and FIG.8B, a moving member terminal 33 and a moving switch-plate
26 are different from the moving member terminal 23 and the moving switch-plate 16
in the second embodiment as shown in FIG.5A, respectively. Other elements in the switch
of the third embodiment are identical with the corresponding elements in the switch
of the second embodiment. Therefore, elements similar to the elements in the second
embodiment are identified like reference numerals, and the description is omitted.
[0035] In FIG.8A, the moving member terminal comprises the first projection part 23C and
the second projection part 13G which is shorter than the first projection part 23C.
Furthermore, a third projection part 33F which is shorter than the second projection
part 13G is provided between the first projection part 23C and the second projection
part 13G.
[0036] FIG.8B is an assembly diagram of the switch unit of the third embodiment. Referring
to FIG.8B, the third projection part 33F is inserted in the slit 14D of the change-over
member 14. Position, shape and a size of the third projection part 33F are selected
so as to avoid interference between motions of the third projection part 33F and the
change-over member 14, leaf spring 25 and moving switch-plate 26. Referring to FIG.8A,
the moving switch-plate 26 has hook parts 26F at an end part adjacent to the moving
contact 20B in a slit 26D. The hook parts 26F take the forms of hook.
[0037] FIG.9A is a plan view of the moving switch-plate 26 and the change-over member 14
to be engaged with the hook parts 26F of the moving switch-plate 26, at the state
before the change-over member 14 is engaged with the moving switch-plate 26. In FIG.9A,
the change-over member 14 is moved in the direction of an arrow and is forced to the
hook parts 26F at the notches 14B of the change-over member 14. The change-over member
14 has resiliency in the width direction, because of having the slit 14D. Therefore
the notches 14B pass the arrow-shaped hook parts 26F and are engaged with the hook
parts 26F as shown in FIG.9B. Since the hook parts 26F take the forms of the hook,
after the notches 14B have been inserted in the hook parts 26F, the change-over member
14 does not easily separate from the moving switch-plate 26. Namely, the change-over
member 14 is temporarily assembled to the moving switch-plate 26. By the above-mentioned
configuration, as shown in FIG.10, even if a hard shock is given to the switch in
the direction of arrow F in the state that the switch unit of the third embodiment
is mounted in the switch case 11, the moving switch-plate 26 is not liable to separate
from the change-over member 14. Moreover, the third projection part 33F is inserted
in the slit 14D of the change-over member 14. When the shock is given in the direction
of arrow F, the change-over member 14 is supported by the third projection part 33F.
Therefore, the change-over member 14 does not shift to the direction of arrow F, and
the end part 16C of the moving switch-plate 26 does not separate from the slot 17A
of the slide member 17. Deformation of the leaf spring 15 due to excessive compression
is prevented. Consequently, a stable and an optimum contact pressure is kept, and
the switch having a high reliability and a long operating life is realizable.
[0038] Assembly process of the switch in the third embodiment is shown in FIG.11 through
FIG.16. As shown in FIG.11, first, the notches 14B of the change-over member 14 are
inserted in the hook parts 26F of the moving switch-plate 26, and the change-over
member 14 is temporarily engaged with the moving switch-plate 26. FIG.12 shows a state
before assembling with the moving member terminal 33 of the change-over member 14
which has been temporarily engaged with the moving switch-plate 26. As shown in FIG.13,
the recess 14A of the change-over member 14 is engaged with the first supporting recess
13A. Furthermore, as shown in FIG.14, the recess 15B of the leaf spring 15 is engaged
with the second supporting recess 13B of the moving member terminal 33. Lastly, as
shown in FIG.15, the other end 15A of the leaf spring 15 is engaged with the recess
16A of the moving switch-plate 26, and the assembly process is completed. As mentioned
above, since the change-over member 14 and the moving switch-plate 26 are temporarily
connected with the moving member terminal 33 by the hook parts 26F of the moving switch-plate
26 and the third projection part 33F, the assembly work is easily accomplished. Moreover,
the assembly work is performed in the vertical direction in FIG.12 through FIG.15.
Therefore, assembly operation is easy, and is able to be automatized.
[0039] Incidentally, FIG.16 shows the switch unit in the state that the moving switch-plate
26 is in the OFF-state, and the switch unit is mounted to the switch case 11 in this
state.
[0040] As mentioned above, in the switch in accordance with the present invention, the moving
member terminal is formed in the L-shape, and the moving switch-plate, the leaf spring
and the change-over member are arranged substantially parallel to the bottom face
of the switch case. Therefore the height of the switch from the mounting printed circuit
board to the frame cover can be reduced.
[0041] In the case of a switch comprising the leaf spring 25 having the bent part 25C, when
the switch turns to OFF-state, the bent part 25C touches the first projection part
23C of the moving member terminal 23; and the movement of the leaf spring 25 is suspended.
Therefore, the length of the first projection part can be reduced. Consequently, the
material for making the moving member terminal 23 is reduced and a size of the switch
is also reduced.
[0042] In the embodiment as explained with reference to FIG.9A and FIG.9B, the notches 14B
of the change-over member 14 are engaged with the hook parts 26F formed on an end
part of the slit 26D of the moving switch-plate 26 by utilizing elasticity of the
change-over member 14 itself. In that embodiment, since the change-over member 14
is temporarily engaged with the moving switch-plate 26 in assembly process, dropout
of the change-over member 14 can be prevented, the assembly work is easily accomplished,
and steps of the assembly work can be reduced.
[0043] In the switch comprising the moving member terminal 33 having the third projection
part 33F, since the change-over member 14 is supported by the third projection part
33F in the case that a hard shock is given to the switch, deviation of the change-over
member 14 from the moving member terminal 33 is prevented. Furthermore, the assembly
work is easily accomplished and automatic assembly is realizable.
[0044] Although the present invention has been described in terms of the presently preferred
embodiments, it is to be understood that such disclosure is not to be interpreted
as limiting. Various alterations and modifications will no doubt become apparent to
those skilled in the art to which the present invention pertains, after having read
the above disclosure. Accordingly, it is intended that the appended claims be interpreted
as covering all alterations and modifications as fall within the true spirit and scope
of the invention.
1. A switch comprising
a fixed terminal (12) having a fixed contact (20A) on one end part and a wiring
part (12A) to be connected to an external circuit on the other end part,
a moving member terminal (13) made of an L-shaped member for holding a moving switch-plate
(16) having a moving contact (20B) for detachably contacting said fixed contact (20A),
having a wiring part (13E) to be connected to an external circuit at one end part
of said L-shaped member, and having a first projection part (13C) at the other end
part of said L-shaped member and a recess portion (13D) formed at the base portion
of said first projection part (13C),
a switch case (11) for holding said fixed terminal (12) and said moving member
terminal (13) so that said fixed terminal (12) is electrically insulated from said
moving member terminal (13) and said wiring parts (12A, 13E) of said fixed terminal
and said moving member terminal to be connected to respective external circuits are
protruded from the same wall of said switch case,
a leaf spring (15) engaged at its one end part (15B) with a second supporting recess
(13B) in said recess portion (13D) formed on said moving member terminal (13), and
receiving said first projection part (13C) of said moving member terminal (13) in
a slit (15D) formed in a central portion of said leaf spring,
a change-over member (14) engaged at its one end (14A) with a first supporting
recess (13A) formed on an opposite position to said second supporting recess (13B)
in said recess portion (13D) of said moving member terminal (13),
a moving switch-plate (16) having said moving contact (20B) at its one end part
and a slit (16D) in a central portion, arranged substantially parallel to a face (11D)
of said switch case (11) for supporting said fixed terminal (12) and said moving member
terminal (13) so as to protrude outward said wiring parts (12A, 13E) to be connected
to external circuits, engaged rotatably with the other end (15A) of said leaf spring
(15) at an end part apart from said moving contact (20B), and engaged rotatably with
the other end (14B) of said change-over member (14) at a nearer end part of said slit
(16D) to said moving contact (20B), and
a slide member (17) slidably engaged in said switch case (11) with an end part
(16C) of said moving switch-plate (16).
2. A switch in accordance with claim 1, wherein
a bent part (25C) to which said first projection part (23C) contacts when the moving
contact is remote from the fixed contact is formed at an end part of a slit (25D)
of said leaf spring (25).
3. A switch in accordance with claim 1, wherein
said moving switch-plate (26) comprises hook parts (26F) at an end part of said
slit (26D) adjacent to said moving contact (20B), and the end parts (14B) of said
change-over member (14) are engaged with said hook parts (26F).
4. A switch in accordance with claim 1, wherein
said moving member terminal (33) comprises a third projection part (33F) to be
inserted to the slit (14D) of said change-over member (14) at said recess portion
of said moving member terminal (33).
5. A switch in accordance with claim 1, wherein
two switch units each of which comprises said fixed terminal (12), moving member
terminal (33), leaf spring (25) and moving switch-plate (26) are provided in one switch
case (11), and said two switch units are engaged with one slide member (17) so as
to make simultaneous operation.
6. A switch in accordance with claim 2, wherein
two switch units each of which comprises said fixed terminal (12), moving member
terminal (33), leaf spring (25) and moving switch-plate (26) are provided in one switch
case (11), and said two switch units are engaged with one slide member (17) so as
to make simultaneous operation.
7. A switch in accordance with claim 3, wherein
two switch units each of which comprises said fixed terminal (12), moving member
terminal (33), leaf spring (25) and moving switch-plate (26) are provided in one switch
case (11), and said two switch units are engaged with one slide member (17) so as
to make simultaneous operation.
8. A switch in accordance with claim 4, wherein
two switch units each of which comprises said fixed terminal (12), moving member
terminal (33), leaf spring (25) and moving switch-plate (26) are provided in one switch
case (11), and said two switch units are engaged with one slide member (17) so as
to make simultaneous operation.