JP5146588B2 - Push-button switch - Google Patents

Description

  The present invention relates to a push button switch that can be suitably used for an elevator switch or the like.

  As a push button switch used for an elevator switch for designating a destination floor or opening / closing a door, a switch using a tactile switch has been proposed to obtain a click feeling at the time of a push operation (for example, Patent Document 1). reference).

JP 2003-272473 A

  There are two types of elevator switches: one that is embedded in the wall and the other that is mounted on a wall panel that is attached to the wall. In the wall-mounted type, the push button switch is configured to be as thin as possible in order to reduce the overhang of the operation panel. It is desirable.

  By configuring the elevator switch to have a click feeling, it is possible to recognize the switch operation as a tactile sensation and to improve the usability. In this case, the tactile switch is useful as an elevator switch because it provides a click feeling. However, the tactile switch is constructed so as to give a click feeling by reversing and deforming the movable contact formed in the dome shape. In order to increase the service life and increase the life, it is necessary to use a large movable contact, which makes it difficult to reduce the thickness, and there is a difficulty in using it as a wall-mounted elevator switch.

  The present invention has been made paying attention to such a situation, and an object of the present invention is to provide a push button switch that can be thinned while ensuring a click feeling.

(1) The push button switch of the present invention is equipped with a plunger that can be pushed in, a return spring that acts on the plunger, a lever link mechanism that moves the plunger in parallel, and a switch body that is operated by the operation of the lever link mechanism.
The lever link mechanism includes a pair of lever links arranged to oscillate around the intermediate fulcrum on the base, and a joint member that connects the butt ends of the lever links, and the lever link is moved by the plunger. The operation piece that opposes the switch body is installed across the lever links, and the lever links are pulled and urged by the tension coil springs locked to the free ends of the lever links. The lever link mechanism can be snapped in the plunger moving direction in accordance with the swinging operation of the lever link, and the switch body is pressed by the operation piece that moves in the plunger moving direction in accordance with the operation of the lever link mechanism. Features.

  According to the present invention, the elastic characteristics can be stably produced as compared with the case where a leaf spring is installed over both lever links, and both lever links are attracted and biased by a tension coil spring that can be easily set to an arbitrary spring constant. Thus, it is possible to obtain a click feeling with stable characteristics with little variation.

  (2) In one embodiment of the push button switch of the present invention, a pair of the tension coil springs are respectively stretched across the operation piece and the outer end of each lever link.

  According to this embodiment, the desired spring force that pulls and urges the lever links is divided into a pair of tension coil springs, so that each tension coil spring can be made smaller or smaller in diameter, which reduces the biasing structure. It becomes effective.

  (3) In another embodiment of the push button switch of the present invention, the tension coil spring is inserted into and accommodated in a notch formed in the operation piece.

  According to this embodiment, the operation piece and the tension coil spring can be overlapped and compactly assembled, which is effective for thinning the push button switch.

  Thus, according to the present invention, it is possible to obtain a push button switch that can be thinned while ensuring a click feeling.

It is a perspective view which shows the external appearance of the pushbutton switch of a 1st reference example. It is a vertical side view in the center part of the pushbutton switch of the 1st reference example. It is a vertical side view in the site | part displaced from the center of the pushbutton switch of a 1st reference example. It is a disassembled perspective view of the pushbutton switch of the 1st reference example. It is operation | movement explanatory drawing of a lever link mechanism. It is a perspective view which shows the external appearance of a switch main body. It is a vertical side view which shows the OFF state (a) and ON state (b) of a switch main body. It is a disassembled perspective view of a switch body. It is a disassembled perspective view which shows an example of a pushbutton switch attachment structure. It is a vertical side view which shows a pushbutton switch attachment state. It is a disassembled perspective view which shows the other example of a pushbutton switch attachment structure. It is a vertical side view which shows a pushbutton switch attachment state. It is a disassembled perspective view which shows another example of the pushbutton switch attachment structure. It is a vertical side view which shows a pushbutton switch attachment state. It is a perspective view which shows the external appearance of the pushbutton switch of a 2nd reference example. It is a vertical side view in the center part of the pushbutton switch of the 2nd reference example. It is a disassembled perspective view of the pushbutton switch of the 2nd reference example. It is a disassembled perspective view of the pushbutton switch of the 2nd reference example comprised to other attachment specifications. It is an external appearance perspective view of the pushbutton switch of the 2nd reference example comprised to other attachment specifications. It is a vertical side view which shows the attachment state of the pushbutton switch of the 2nd reference example comprised by the other attachment specification. It is a perspective view which shows the external appearance of the pushbutton switch of the 1st example of this invention. It is a vertical side view in the center part of the pushbutton switch of the said 1st example. It is a perspective view which shows the external appearance of the pushbutton switch of the said 1st example. It is a disassembled perspective view of the pushbutton switch of the said 1st example.

  Hereinafter, reference examples and embodiments of the present invention will be described with reference to the drawings.

  1 to 4 show a first reference example of a push button switch A used as an elevator switch. FIG. 1 is a perspective view of the entire appearance, FIGS. 2 and 3 are longitudinal side views thereof, FIG. Is an exploded perspective view of the push button switch mounted on the inner wall of the elevator wagon.

  The push button switch A has a basic structure in which a switch body 2, a circuit board 3, a plunger 4 for operating a switch, a lever link mechanism 5 for translating the plunger 4, and the like are assembled to the base 1.

  The base 1 is formed in a rectangular or square shape having a low peripheral wall 1a erected around the four sides. The circuit board 3 is fixed along the inner bottom surface of the base 1 and mounted on the end of the circuit board 3. The connector 6 is provided in the opening 7 shown in FIG. 4 formed in a part of the peripheral wall 1a so that external wiring can be connected to the connector.

  The switch body 2 is fitted and mounted in the central opening 3 a of the circuit board 3. As will be described later, the switch body 2 uses upper and lower thin leaf switches provided with operation protrusions 8 on the upper surface, and a pair of plate-like external terminals 9 and 10 led out from the switch body 2 to the left and right are circuit. The circuit pattern formed on the upper surface of the substrate 3 is soldered and connected.

  The lever link mechanism 5 includes a pair of lever links 11 formed by bending a metal wire into a U-shape, a pair of joint members 12 that butt-connect each other in a refractive manner, and left and right for switch operation and snap operation. It consists of a long leaf spring 13. The lever links 11 and 11 are opposed to each other so that both end portions thereof are abutted with each other, the both end portions of each lever link 11 are refracted inward and abutted, and the refraction end portions 11a and 11a that are abutted with each other. The joint member 12 is inserted and connected. A spring hook portion 11 b that protrudes upward is bent at the outer end portion of each lever link 11.

  The leaf spring 13 has a central portion in the longitudinal direction bent in a mountain shape, and curled portions 13a are formed at both ends of the leaf spring 13, and the overall length of the leaf spring is expanded and contracted by elastic deformation of the mountain shaped bent portion. The curled portions 13 a at both ends are respectively engaged with the spring hook portions 11 b of the both lever links 11. Further, the central portion of the leaf spring 13 is disposed to face the operation protrusion 8 of the switch body.

  Each lever link 11 of the lever link mechanism 5 configured as described above is inserted between the butt end portions of the upper protrusion 14 and the lower protrusion 15 provided on the base 1, and as shown in FIG. The latching point is supported as an intermediate fulcrum p so that the seesaw can be swung, and the outer end of each lever link 11 is engaged and supported by a locking part 16 projecting from the plunger 4.

  The plunger 4 is formed in a hollow rectangular shape having an opening 17 in the center, and a peripheral wall protruding from the lower surface thereof is fitted into the peripheral wall 1a of the base. A protrusion 18 is provided along the peripheral portion of the opening 17 in the plunger 4, and a substantially rectangular push button 19 having a display mark formed on the surface thereof is externally fitted to the protrusion 18.

  Near the four corners of the base 1, half-cylindrical spring receiving bosses 21 project, and a return spring 22 made of a compression coil spring is inserted and supported. The return spring 22 presses and urges the plunger 4 upward. Yes.

  In the state where the plunger 4 is in the return position, as shown in FIGS. 3 and 5A, the lever links 11 of the lever link mechanism 5 are in a valley folded posture in which the butted portion is slightly lower than the outer end portion. At this time, as shown in FIG. 2, the leaf spring 13 is separated from the operation projection 8 of the switch body 2.

  When a pushing operation force is applied to the push button 19, the plunger 4 pushes and moves against the return spring 22, the outer ends of both lever links 11 in the lever link mechanism 5 are displaced downward, and the plunger 4 is pushed in parallel. Moving. As the plunger 4 moves, the lever link 11 swings the seesaw around the intermediate fulcrum p, which is the locking point between the upper protrusion 14 and the lower protrusion 15, and the levers 11 are spring-loaded by this seesaw swing. The space between the portions 11b is expanded, and the leaf spring 13 is elastically deformed so as to be extended, and the pushing operation resistance is slightly increased by this deformation reaction force.

  As soon as the lever link 11 is continuously rocked by the seesaw and the both spring hooks 11b pass the fulcrum p downward, as shown in FIG. 5B, the elastic force of the leaf spring 13 causes the lever link 11 to move. The outer end portions are attracted to each other, and the lever links 11 are instantaneously reversed and biased toward a mountain-folding posture where the abutting portion is higher than the outer end portion, and the pushing operation resistance is instantaneously caused by a snap operation that reverses the biasing direction. This is reduced to a feeling of clicking and felt by the finger operating the push button 19.

  The lever link mechanism 5 snaps to move the leaf spring 13 downward, the operation projection 8 of the switch body 2 is pushed in at the central portion of the leaf spring 13, and the switch body 2 is turned on.

  When the push-in operation to the push button 19 is released, the plunger 4 is returned upward by the return spring 22 and the outer end of the lever link 11 is also moved upward accordingly, and the lever link mechanism is moved by the reverse snap operation. 5 returns to the original posture, and the switch body 2 returns to the OFF state.

  The detailed structure of the switch body 2 is shown in FIGS. The switch body 2 is configured by incorporating a fixed contact 26 made of a leaf spring, a movable contact 27, and an actuator 28 for operating the movable contact 27 into a resin switch case 25.

  The switch case 25 is composed of an upper case 25a and a lower case 25b formed in a shallow box shape, and caulking pins 29 protruding from the four corners of the lower case 25b are inserted into the connecting holes 30 of the upper case 25a to be caulked and deformed. Thus, the upper case 25a and the lower case 25b are integrally connected. The fixed contact 26 and the movable contact 27 are sandwiched and fixed in an inward cantilevered manner between the upper case 25a and the lower case 25b in a state where the fixed contact 26 and the movable contact 27 are positioned and fitted to the caulking pin 29 through the connection holes 31 and 32, and are fixed. The free ends of the contact 26 and the movable contact 27 are arranged opposite to each other with a space therebetween. The fixed contact 26 and the movable contact 27 protrude outside the case to form the external terminals 9 and 10.

  The actuator 28 is provided with a pair of left and right fulcrum projections 33 at one end thereof and the operation projection 8 at the outer surface of the other end. The fulcrum protrusion 33 is engaged with the recesses 34 formed on the left and right peripheral walls of the lower case 25b and supported by the upper case 25a to be connected to the actuator 28 so that the actuator 28 swings around the fulcrum protrusion 33. Supported as possible. The operation protrusion 8 protrudes from an opening 35 formed in the upper case 25a. When the operation protrusion 8 is pushed in, the movable contact 27 is elastically deformed as shown in FIG. 26 is brought into contact with the switch 26 and the switch-on state appears.

  The elevator switch is attached to the operation panel provided on the inner wall of the elevator wagon or the outer wall of the elevator entrance / exit on each floor. Some examples of the push button switch A mounting structure are shown in FIGS. ing.

  In the example shown in FIG. 9 and FIG. 10, a pair of mounting brackets 37 made of a leaf spring material are inserted and fixed to the bottom surface of the base 1. The mounting bracket 37 is provided with a locking claw 37a bent in a U-shape, and the mounting bracket 37 is inserted into a mounting hole 39 formed in the back panel 38b of the operation panel 38 which is formed in a thin hollow shape in the front and rear. The push button switch A can be attached and fixed to the back panel 38b by press-fitting the latching claws 37a and elastically locking them. Thereafter, the front panel 38a is attached by performing wiring processing and the like, and the push button 19 is provided in the opening 40 formed in the front panel 38a.

  In the example shown in FIGS. 11 and 12, a plate-like mounting bracket 37 provided on the back side of the back panel 38 b in the operation panel 38 is used. A locking piece 37b with a hole is formed by folding from the mounting bracket 37, and this locking piece 37b is projected forward from the back panel 38b. When the switch is attached, the push button switch A is pushed between the groups of locking pieces 37b projecting forward from the back panel 38b, and the locking pieces 37b are inserted into the recesses 41 formed on the outer peripheral surface of the base 1. The push button switch A can be attached and fixed to the back panel 38b by locking the protrusion 42 provided in the recess 41 to the locking piece 37b. Thereafter, the front panel 38a is attached by performing wiring processing and the like, and the push button 19 is provided in the opening 40 formed in the front panel 38a.

  In the example shown in FIGS. 13 and 14, a plate-like mounting bracket 37 is connected and fixed to the bottom surface of the base 1. The mounting bracket 37 of this example has a locking piece 37c with a hole formed in a folded manner, and a pair of protruding pieces 37d with holes at diagonal positions, and a rear surface using the protruding pieces 37d with holes. A mounting bracket 37 is screwed to the panel 38b. When mounting the switch, the push button switch A is pushed in between the locking pieces 37c protruding from the rear panel, and the locking pieces 37c are inserted into the recesses 41 formed on the outer peripheral surface of the base 1, and the recesses 41 are provided. The push button switch A can be attached and fixed to the rear panel 38b by locking the protrusion 42 to the locking piece 37c. Thereafter, the front panel 38a is attached by performing wiring processing and the like, and the push button 19 is provided in the opening 40 formed in the front panel 38a.

  15 to 17 show a second reference example of the push button switch A. FIG. 15 is an overall perspective view of the push button, FIG. 16 is a longitudinal side view thereof, and FIG. 17 is an exploded perspective view thereof.

  As in the first example, the push button switch A includes a switch body 2, a circuit board 3, a plunger 4 for operating a switch, a lever link mechanism 5 for translating the plunger 4 while snapping, The same functional parts and parts as those in the first example are denoted by the same reference numerals as those in the first example, and detailed description thereof is omitted.

  The base 1, the switch body 2, the circuit board 3, and the lever link mechanism 5 of the push button switch A are the same as those in the first example, and the plunger operation structure is different from that in the first example.

  That is, a circular push button 19 is connected to the upper surface of the plunger 4 via a pair of connecting pins 45, and a cover 46 is attached and fixed to the base 1, and a cylindrical guide portion 46 a formed on the cover 46. The push button 19 is guided so as to move up and down. The cover 46 is provided with a locking piece 46b with a hole. The locking piece 46b is engaged with a recess 41 formed on the outer periphery of the base 1, and the protrusion 42 provided in the recess 41 is connected to the locking piece 46b. The cover 46 is connected and fixed to the base 1.

  Further, the above-described pair of elastic locking claw-type mounting brackets 37 are mounted and fixed on the bottom surface of the base 1, and can be mounted on the back panel 38b of the operation panel 38 not shown in the manner shown in FIG.

  The push button switch A having this configuration can be attached to the front panel 38a of the operation panel 38 as follows.

  That is, as shown in FIGS. 18 to 20, instead of the cover 46, a mounting flange 48 is connected and fixed to the base 1, and the push button 19 is moved by a cylindrical guide portion 48 a provided on the mounting flange 48. Guided to move up and down.

  The mounting flange 48 is formed to have a size protruding from the outer shape of the base 1, and the front panel 38a of the operation panel 38 is sandwiched between the mounting flange 48 and the base 1 as shown in FIG. The push button switch A can be attached and fixed to the front panel. The mounting flange 48 is provided with a locking piece 48b with a hole. The locking piece 48b is engaged with a recess 41 formed on the outer periphery of the base 1, and the protrusion 42 provided in the recess 41 is locked. The mounting flange 48 can be connected to the base 1 by being locked to the piece 48b.

  21 to 24 show a first example of a push button switch A according to the present invention. FIG. 21 is an overall perspective view, FIG. 22 is a longitudinal side view thereof, and FIG. 23 is a perspective view of an essential part thereof. FIG. 24 is an exploded perspective view of the whole.

  The push button switch A includes a switch body 2, a circuit board 3, a plunger 4 for operating a switch, and a lever link mechanism 5 for translating the plunger 4 while operating a snap, as in the second reference example. The cover 46, the push button 19, and the like are assembled, and the same functional parts and parts as those in the second reference example are denoted by the same reference numerals as those in the second reference example, and detailed description thereof is omitted.

  This push button switch A is different from the first reference example and the second reference example in the plunger operation structure and the assembly specifications of the circuit board 3.

  That is, in this example, the operation piece 50 for pressing the switch body 2 is locked and mounted over the outer end portion of each lever link 11 in the lever link mechanism 5, and the operation piece 50 and each lever A tension coil spring 51 is stretched over the outer end portion of the link 11, and the lever links 11 are attracted and biased.

  The operation piece 50 is formed into a horizontally long shape by punching a thick metal plate, and bent portions 50a formed at both ends thereof are locked to the outer end portions of the lever links 11 from above. Notches 52 are formed in the left and right parts of the operation piece 50, and the tension coil spring 51 is inserted and accommodated therein. An operation tongue piece 50b is cut out in a cantilevered manner at the left and right central portion of the operation piece 50 and faces the operation protrusion 8 of the switch body 2 from above.

  The switch body 2 uses a leaf switch as in the previous example, and a pair of plate-like external terminals 9 and 10 led out from the switch body 2 are soldered to a circuit pattern formed on the upper surface of the circuit board 3. Has been.

  The circuit board 3 is mounted and connected from below the base 1, and the switch body 2 mounted on the circuit board 3 is disposed in the base through an opening 53 formed in the center of the base 1. The above-described pair of elastic locking claw-type mounting brackets 37 are mounted and fixed on the back surface of the circuit board 3, and can be mounted on the back panel 38b of the operation panel 38 not shown in the manner shown in FIG. A dust-proof seal 54 is attached to the back surface of the circuit board 3 to prevent dust from entering the inside.

  Other Embodiments The present invention can also be implemented in the following forms.

  (1) The switch body 2 is desirably a leaf switch that can be easily reduced in thickness, but can be implemented using a switch having another specification that does not have a click feeling.

  (2) The push button 19 can be integrally formed with the plunger 4.

  (3) According to various specifications, a plurality of types of push buttons 19 and plungers 4 are prepared in advance, and the switch body 2, the circuit board 3, the leaf spring 13, and the arbitrarily selected push buttons 19 and 4, and By incorporating the lever link mechanism 5 in common, the push button switch A can be configured with a wider variety of specifications to meet the needs.

  (4) A tension coil spring that snaps the lever link mechanism 5 may be stretched over the outer ends of both lever links 11.

  The present invention is useful as various push button switches.

DESCRIPTION OF SYMBOLS 1 Base 2 Switch body 4 Plunger 5 Lever link mechanism 11 Lever link 12 Joint member 13 Leaf spring 37 Mounting bracket 46 Cover 48 Mounting flange 50 Operation piece 51 Pulling coil spring 52 Notch

Claims (3)

Equipped with a plunger that can be pushed in, a return spring that acts on the plunger, a lever link mechanism that moves the plunger in parallel, and a switch body that is operated by the operation of the lever link mechanism.
The lever link mechanism includes a pair of lever links arranged to oscillate around the intermediate fulcrum on the base, and a joint member that connects the butt ends of the lever links, and the lever link is moved by the plunger. It can be operated,
An operating piece facing the switch body is installed across the lever links, and the lever links are pulled and urged by a tension coil spring locked to the outer end of each lever link. The lever link mechanism can be snapped in the plunger movement direction with the movement operation,
A push button switch, wherein the switch body is pressed by the operation piece that moves in a plunger moving direction in accordance with the operation of the lever link mechanism.   2. The push button switch according to claim 1, wherein a pair of said tension coil springs are stretched across the operation piece and the outer end of each lever link.   The push button switch according to claim 1 or 2, wherein the tension coil spring is inserted into and accommodated in a notch formed in the operation piece.

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