JP4194060B2 - Tilt switch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tilt switch provided for detecting the tilt of a device and controlling power supply.
[0002]
[Prior art]
Conventionally, an inclination switch that is attached to an opening / closing drive part such as a circuit breaker or kitchen equipment and controls power supply is required to have repeated opening / closing durability in a specific direction, unlike a fall detection switch, and is currently mercury as shown in FIG. A switch or the like is used.
[0003]
[Problems to be solved by the invention]
Tilting switches using mercury have major environmental problems, and are not suitable for food handling equipment such as kitchen facilities.
Further, when repeated opening / closing durability is required, the conventional fall detection type tilt switch has problems in opening / closing capacity and durability.
The present invention has been invented for the purpose of solving such problems and providing a tilt switch having excellent durability and consideration for the environment.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is connected by a casing having a substantially cylindrical or substantially cubic space portion and a connecting means in which the space portion is rotatably arranged in a substantially linear direction. A plurality of rotating bodies and a contact mechanism storage portion arranged in parallel in the space portion, and a movable contact piece and a fixed contact piece formed by a spring member in the contact mechanism storage portion are arranged to face each other. An actuator that is rotated by the movement of the rotating body is provided with a rotating shaft, and a part thereof is arranged to protrude into the space.
Further, the fixed contact piece is supported by a stopper portion that supports the falling-down at a fixed position, and the operating element is disposed so as to project into the space portion at an obtuse angle with the side surface of the space portion.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
According to the present invention, the weight of the rotating body is smooth by rotating the actuator having the rotating shaft by the movement of the plurality of rotating bodies connected by the connecting means and bringing the spring members arranged opposite to each other into contact with each other. Therefore, a stable contact force is transmitted to the spring member, so that a relatively large opening / closing capacity can be secured, and a tilt switch excellent in durability can be configured.
[0006]
【Example】
Hereinafter, the present embodiment will be described with reference to the drawings.
FIG. 1 is a front sectional view showing a first embodiment of a tilt switch of the present invention (clockwise tilted state), FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a sectional view showing a counterclockwise tilted state thereof. is there.
[0007]
In these drawings, a housing 1 and a cover 18 having a housing divided into two sides are provided with a horizontally long space portion 2 and a contact mechanism housing portion 3 formed in parallel with the space portion 2 with a partition wall 4 interposed therebetween. The part 2 accommodates three spheres 7 as a plurality of rotating bodies connected by connecting means, and a plate spring-like movable contact piece 12 and a fixed contact piece 14 are held in a cantilever shape. In the state, it is disposed opposite to the contact mechanism storage unit 3.
Further, a movable contact 13 and a fixed contact 15 are welded to a substantially intermediate portion of the movable contact piece 12 and a distal end portion of the fixed contact piece 14 to form a contact mechanism portion corresponding to a relatively large switching capacity.
[0008]
Also, faston terminals 16 and 17 that are individually provided are led out to the outside of the housing, and a part of the fixed contact side of the movable contact piece 12 and the fixed contact piece 14 is elastically contacted using the elasticity of the spring member. However, it is also possible to extend the movable contact member and the fixed contact member, respectively, to also serve as external terminals.
[0009]
An actuator 8 having a rotation shaft 9 is rotatably disposed in a substantially intermediate portion between the space portion 2 and the contact mechanism storage portion 3 with the rotation shaft 9 locked to the partition wall 4. Yes.
The operating element 8 has one surface 10 protruding into the space portion 2 in an obtuse angle and a pressing portion 11 provided on the other side is in contact with the movable contact piece 12. It arrange | positions so that the piece 12 may be pressed and it may contact with the fixed contact piece 14 and each contact.
[0010]
In this embodiment, three spheres 7 are accommodated in the space 2, but the spheres 7 on both sides serve as auxiliary weights at the time of on and off, respectively, and the spheres 7 are used as necessary. Can be increased or decreased to meet the usage conditions.
That is, the sphere 7 can be increased when the contact pressure is required to increase the switching capacity, and the sphere 7 can be decreased when the switching capacity is at the signal detection level.
[0011]
FIG. 4 is a moment diagram based on the configuration of the main parts of the first embodiment, and shows a state inclined about 30 degrees counterclockwise.
The component force W in the movement axis direction of the force generated by the dead weight of the sphere 7 exhibits a state in which the sphere 7 is sandwiched between the upper wall of the space portion 2 and the actuator 8, so that a vector of a large pressing force N is activated. In addition to the child 8, a pressing moment of F is transmitted from the actuator 8 to the tip of the movable contact piece 12. Since the contact force P satisfies P≈F (L1 / L2) based on the positional relationship between the action point and the force point of the movable contact piece 12, the contact force P far exceeding the weight of the sphere 7 is always stable contact. And a large switching capacity can be secured.
[0012]
Further, since the contact mechanism housing part 3 is arranged in parallel with the space part 2 which is a moving space of the sphere 7, it is possible to lengthen the beam of the movable contact piece without increasing the outer shape of the tilt switch. Can be used effectively.
[0013]
Further, since the rotating shaft 9 is provided on the operating element 8, the rotating moment of the spherical body 7 to the operating element 8 is transmitted to the movable contact piece 12 without being attenuated and the returning operation of the operating element 8 at the time of return is smooth. Can be.
[0014]
Further, by connecting the spheres 7 in a freely rotatable manner, the component force in the moving direction of all the spheres 7 can be added and transmitted to the actuator, so that the tilt switch is compared with the case where the spheres 7 are not connected. The main body can be made more compact, and reliable contact switching and improved contact force can be achieved.
[0015]
FIG. 5 is a front sectional view showing a clockwise tilt state of the second embodiment of the tilt switch of the present invention, FIG. 6 is a front sectional view showing the counterclockwise tilt state, and FIG. It is a top view.
Compared to the first embodiment in that the external connection is connected by a connector 40, and further arrangement of the stationary contact piece 34 and the movable contact piece 32 is different.
[0016]
Specifically, the fixed contact piece 34 and the movable contact piece 32 arranged in parallel in the contact mechanism housing portion 23 are crossed to face each other only in the vicinity of the contact portion, and a stopper 39 that projects the falling of the fixed contact piece 34 on the base 21 is provided. The structure is supported in a fixed position. The fixed contact portion is formed sharp by bending the tip end portion of the fixed contact piece 34.
[0017]
With this configuration, it is possible to save the space of the contact mechanism housing portion 23 and make the tilt switch more compact, and to provide a highly accurate tilt switch by absorbing the variation in the bending dimension of the fixed contact piece 34. It has the feature that it can be.
Although the present second embodiment is configured as a tilt switch for minute rating, a high contact reliability can be maintained because the contact wiping amount after contact can be sufficiently secured.
[0018]
FIG. 8 shows an application development example of the rotating body 47 of the tilt switch of the present invention. A cylindrical body is used instead of a spherical body, but other barrel-shaped rotating bodies are used, or a guide groove is formed in the cylindrical body and rotated along a rail protruding from the space ( Various developments are possible, such as none (not shown).
FIG. 9 is a perspective view showing the principal part of a tilt switch according to a third embodiment of the present invention. A rotating shaft 89 is formed on the rotating body 87 and is connected by a connecting plate 90 so as to be rotatable .
[0019]
【The invention's effect】
As described above in detail, according to the present invention, the following effects can be obtained.
(1) A housing having a space portion, a plurality of rotating bodies connected by connecting means in which the space portion is rotatably arranged in a substantially linear direction, and a contact mechanism arranged in parallel in the space portion A movable contact piece formed by a spring member and a fixed contact piece facing each other, and an actuator rotated by the movement of the rotating body is provided on a rotation shaft Since a part of the operating element protrudes into the space, and the movable contact piece is pressed by the turning of the operating element to come into contact with the fixed contact piece. It is possible to secure a contact force far surpassing the above, maintain a stable contact at all times, and secure a large switching capacity.
(2) Since the movable contact piece formed by the spring member and the fixed contact piece are arranged opposite to each other in the contact mechanism housing portion arranged in parallel in the space portion, the length of the spring member can be efficiently arranged. Thus, the moment can be used effectively without increasing the outer shape of the tilt switch, and a tilt switch with high contact reliability can be configured.
(3) An actuator that is rotated by the movement of a plurality of rotating bodies connected by a connecting means is provided with a rotating shaft, and a part of the actuator is protruded into the space, Since the movable contact is pressed to come into contact with the fixed contact by the rotation of the actuator, the rotational moment applied to the actuator by the rotating body is transmitted to the movable contact without being attenuated, and at the time of return. The return operation of the actuator can be made smooth.
(4) Since the fixed contact piece is configured to come into contact with the stopper portion that supports the falling-down at a fixed position, it is possible to provide a highly accurate tilt switch by absorbing variations in the bending dimension of the fixed contact piece. .
(5) Since the rotating body composed of a plurality of rotating bodies that are rotatably connected by the connecting means is disposed, the component forces in the moving direction of all the rotating bodies are added and transmitted to the actuator. Therefore, the tilt switch body can be made more compact than the case where the rotating body is not connected, and reliable contact switching and improvement in contact force can be achieved.
[Brief description of the drawings]
FIG. 1 is a front sectional view (tilted state clockwise) showing a first embodiment of a tilt switch of the present invention.
FIG. 2 is an exploded perspective view showing a first embodiment of the tilt switch of the present invention.
FIG. 3 is a front sectional view (counterclockwise tilted state) showing the first embodiment of the tilt switch of the present invention.
4 is a sectional view showing a moment diagram based on the configuration of main components of the first embodiment of the tilt switch of the present invention. FIG. 5 is a front sectional view showing the second embodiment of the tilt switch of the present invention (clockwise). Inclined state).
FIG. 6 is a front sectional view (counterclockwise tilted state) showing a second embodiment of the tilt switch of the present invention.
FIG. 7 is a plan view illustrating a second embodiment of the tilt switch according to the present invention.
FIG. 8 is an application development example of a rotating body of the tilt switch of the present invention.
FIG. 9 is a perspective view of a main part showing a third embodiment of the tilt switch of the present invention.
FIG. 10 is a front sectional view showing a conventional mercury switch.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,41 Housing 2,22 Space part 3,23 Contact mechanism accommodating part 4 Bulkhead 5,25 Mounting hole 6 Rotating bearing part 7,27 Sphere 8,28,48 Actuator 9,29 Rotating shaft 10,30 Single side 11 , 31 Pressing part 12, 32 Movable contact piece 13 Movable contact point 14, 34 Fixed contact piece 15, 35 Fixed contact point 16, 17 Faston terminal 18, 38 Cover 21 Base 36 Connector terminal 39 Stopper 40 Connector 47, 87 Rotating body 89 Rotating shaft 90 connecting plate

Claims (2)

A casing having a substantially cylindrical or substantially cubic space portion, a plurality of rotating bodies connected by connecting means in which the space portion is rotatably arranged in a substantially linear direction, and juxtaposed in the space portion A movable contact piece formed by a spring member and a fixed contact piece facing each other, and an actuator that is rotated by the movement of the rotating body. The movable contact piece is formed by forming a rotating shaft in the operating element and disposing a part of the operating element protruding into the space, and moving the rotating body to rotate the operating element. A tilt switch, wherein the switch is pressed to contact the fixed contact piece.   The tilt switch according to claim 1, wherein the fixed contact piece is supported by a stopper portion that supports the tilting in a fixed position.

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