JP2004241340A - Inclination switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inclination switch in which minute setup such as a detection angle is possible without malfunctioning against an oscillation or an impact. <P>SOLUTION: In this inclination switch wherein a light emitting/receiving element comprising a light emitting part and a light receiving part are arranged on a printed board, and comprising a pendulum type weight provided with a gobo swinging between the light emitting part and the light receiving part, protruded parts formed on both side surfaces of the pendulum type weight, recessed parts corresponding to the protruded parts and a supporting plate which provided a first gear in a circular arc shape on its end face are integrated by uneven engagement, a second gear formed in an end face of a receiving part arranged on the printed board and the first gear of the supporting plate are engaged, and connecting plates are supported on both side surfaces between the receiving part and the supporting plate rotatably in two directions, right and left, to hang the pendulum type weight, so that center-of-gravity point of pendulum type weight is constituted rotatably right and left in conjunction with inclination of a inclination switch main body. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tilt switch provided to detect a fall of a device and cut off power.
[0002]
[Prior art]
Conventionally, a tilt switch using the rolling of a sphere has a switch body composed of a housing 22 and a base 26, as shown in FIG. In the switch body, there is an optical object in which a sphere 23 and a guide 24 are disposed, and the sphere 23 rolls and detects the upper surface of the guide 24 formed in a concave mortar shape.
[0003]
[Problems to be solved by the invention]
Conventionally, the tilt switch using the rolling of a sphere has a simple structure and is inexpensive, but the movement of the sphere is difficult to control, the sphere easily jumps up, generates a false signal with a slight vibration or impact, etc., and the accuracy of the detection angle is also high. In some cases, the correction circuit was not required, and a separate correction circuit had to be provided.
In addition, because the sphere freely rolls inside the switch body, noise is generated and static electricity is generated because the base and cover are formed of insulating material, and the sphere is attracted into the base and cover inside the switch body. In some cases, a signal cannot be output without the sphere rolling even when the switch body is tilted.
The present invention has been invented to solve such a problem, and prevents a malfunction due to a small vibration or impact, can output a signal reliably when the switch body is tilted, and finely sets a detection angle and the like. To provide a tilt switch that can be used for a wide range of applications.
[0004]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a light emitting and receiving element including a light emitting unit and a light receiving unit on a printed circuit board, and a light shielding plate that swings between the light emitting unit and the light receiving unit. In a tilt switch composed of a pendulum weight, a convex portion is formed on both side surfaces of the pendulum weight, and a concave portion corresponding to the convex portion and a support plate having an arc-shaped first gear provided on an end surface are integrally formed by concave and convex fitting. And a receiving portion formed on an end face of a second gear meshing with the arc-shaped first gear provided on the supporting plate is disposed on the printed circuit board, and is provided on both side surfaces between the receiving portion and the supporting plate. The pendulum-type weight is suspended by pivoting a connecting plate so that the center of gravity of the pendulum-type weight can be rotated left and right in conjunction with the tilting of the tilt switch body.
Further, a hole is provided on a side surface of the pendulum weight, and a weight for adjusting the center of gravity can be provided in the hole.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
The present invention provides a tilt switch using a pendulum weight by combining a gear with a structure that supports the pendulum weight, whereby the center of gravity of the pendulum weight rotates in conjunction with the tilt switch, so that the moving distance can be reduced. It can be made small.
In addition, since the gears are engaged with each other using the connecting plate, the holding of the pendulum weight can be maintained in a stable state, preventing malfunction due to small vibration or impact, and providing a tilt switch of excellent quality. can do.
[0006]
【Example】
Hereinafter, this embodiment will be described with reference to the drawings.
FIG. 1 is a central sectional view showing a first embodiment of the tilt switch of the present invention, FIG. 2 is an exploded perspective view thereof, FIG. 3 is a sectional view showing its neutral state, and FIG. 4 is a sectional view showing its tilted state. .
[0007]
In these figures, a slit 10a of a light emitting and receiving element 10 provided with a light emitting element and a light receiving element facing each other is disposed substantially at a substantially central portion of a printed circuit board 11 having terminals 12 protruding downward, The terminal 12 is connected to the printed circuit board 11 via a wiring pattern.
A second gear 9b formed in an arc shape at the tip of a pair of projections 9a provided on the end face of the receiving portion 9 and the receiving portion 9 arranged substantially horizontally in the cover 1 constituting the tilt switch main body. Are arranged.
On the other hand, a concave portion 2d and a convex portion 2a are provided on both side surfaces of the pendulum type weight 2, and a convex portion 3e and a concave portion 3d are provided on a support plate 3 to be attached to a side surface of the pendulum type weight 2, so that the concave and convex portions are mutually fitted. A caulking portion 2b provided at the tip of the convex portion 2a of the pendulum weight 2 is inserted into the hole 3c of the support plate 3 and then fixed to form an integral body. The formed first gear 3a is disposed, and meshes with the second gear 9b disposed on the receiving portion 9, and the pendulum weight 2 is interlocked with the rotation of the first gear 3a of the support plate 3. The first gear 3a is suspended so as to be swingable, and the pin holes 3b set at substantially the center of the first gear 3a and the pin holes 9c set at substantially the center of the second gear 9b are rotated smoothly by the gears. The pin 4 and the pin 6 are connected via a connecting plate 5 having a pin hole 5a and a pin hole 5b disposed at a fixed distance, so that the rotation of the pendulum weight 2 is always the same distance. It is arranged to take place by.
[0008]
A groove 2c is provided at the lower end of the pendulum type weight 2, and the light shielding plate 8 is fixed with a set screw 7 through the screw hole 2e. The light-shielding portion 8a provided on the light-shielding plate 8 shields the optical axis of the light-emitting surface or the light-receiving surface with respect to the slit portion 10a of the light-emitting and light-receiving device 10 so that the light-emitting and light-receiving device 10 is turned off from the on state. Can be changed to
Then, after the receiving portion 9 provided with the through hole 9d for the light emitting and receiving element 10 at a substantially central portion is mounted on the upper surface of the light emitting and receiving element 10 of the printed circuit board 11, the fitting hole 1a is arranged on the side surface from above. The cover 1 is engaged with the printed board 11 having the convex portion 11a at a position facing the fitting hole 1a while holding the receiving portion 9 therebetween, thereby forming a tilt switch.
[0009]
In the tilt switch configured as described above, as shown in FIG. 4, when the tilt switch main body is tilted beyond a certain angle, the gravitational force related to the center of gravity of the pendulum weight 2 also acts in the tilt direction. The center of gravity of the pendulum weight 2 rotates while the first gear 3a meshes with the second gear 9b of the receiving portion 9, and the light shielding portion of the light shielding plate 8 disposed at the lower end of the pendulum weight 2 in conjunction therewith. 8a shields the optical axis of the light emitting and receiving element 10 and turns off the light receiving element to detect the inclination.
At this time, the center of gravity of the pendulum-type weight 2 is adjusted so as to be substantially at the center of the second gear 9b of the receiving portion 9, and the tilt angle of the pendulum-type weight 2 is not more than a certain angle. As the gears mesh with each other and move without slipping, the center of gravity moves in the direction opposite to the inclination direction, so that the pendulum type weight 2 rotates unnecessarily against slight inclination or vibration that does not require detection. Without stabilizing, it works to prevent malfunction.
[0010]
Further, one or more holes 2f for assembling the center of gravity adjusting weight 13 having a specific gravity different from that of the pendulum type weight 2 are arranged on the side surface of the pendulum type weight 2 in the horizontal direction in the same number of right and left or in a vertical direction in series. The position of the center of gravity of the pendulum weight 2 is changed in steps or the combination ratio of the gears is changed, so that the direction of gravity acting on the center of gravity of the pendulum weight 2 with respect to the inclination direction of the inclination switch is changed to the second direction of the receiving portion 9. Since the pendulum weight 2 does not tilt until the center point of the gear 9b is exceeded, tilt switches having different tilt detection sensitivities can be produced. The angle is also different, and it is possible to invert it after inclining it to the opposite direction beyond the neutral state, so that the on / off as a switch function can be held to a certain angle.
[0011]
Further, a resilient leaf spring portion 5c is provided around a pin hole 5b serving as a rotation center of the connecting plate 5 because the pendulum weight 2 is tilted, and a pin hole 9c on the side surface of the protrusion 9a of the receiving portion 9 is provided. By arranging and combining uneven portions 9e having different inclinations and heights, sliding the uneven portion 9e on the leaf spring portion 5c, and setting the uneven shape and the arrangement of the unevenness, the rotational speed of the connecting plate 5 can be reduced. By regulating the rotation angle and controlling the swing and inclination of the pendulum weight 2, the ON / OFF function as a switch can be reliably maintained.
[0012]
On the other hand, as an application development example of the first embodiment of the tilt switch of the present invention, the outer shape of the pendulum weight 2 is reduced in size (not shown), and the center of gravity of the pendulum weight 2 is adjusted. The weight 13 is not mounted on the pendulum weight 2 itself, but is installed on the light shielding plate 8 fixed to the pendulum weight 2, thereby reducing the number of adjustments of the pendulum weight 2 itself and facilitating the assembly of the tilt switch. be able to.
[0013]
FIG. 5 shows an application example of the tilt switch according to the first embodiment of the present invention. The position of the light shielding unit 14a provided on the light shielding plate 14 for blocking the light emitting and receiving surface 10b of the light emitting and receiving element is changed. It is possible to select and set a switch function for keeping the light emitting / receiving element 10 in the off state and changing the state from the off state to the on state when the pendulum weight tilts down.
[0014]
FIG. 6 shows an application example of the tilt switch according to the first embodiment of the present invention in which the tilt switch is tilted. The reflecting surface 16a is formed at the lower end of the pendulum weight 16, and the tilt switch is mounted on a printed circuit board 21 constituting the tilt switch body. When the pendulum weight 16 is in the neutral state and the light emitting / receiving element 17 is turned on, the light emitting / receiving element 17 provided with the light emitting unit and the light receiving unit is mounted on the printed circuit board 21 with the pendulum weight 16 facing upward. In order to turn on the light emitting / receiving element 17 in the tilted state, the light emitting / receiving element 17 is mounted on the film substrate 19 and connected to the printed circuit board 21, and the inclined surface of the receiving portion 20 together with the reinforcing plate 18 provided on the film substrate 19. When the reflection surface 16a of the pendulum weight 16 is acting so as to maintain the facing direction with the light emitting and receiving element 17, the on state is maintained, and the inclination is deviated from the optical axis of the light emitting and receiving light element 17. Light emitting and receiving element 17 Off the light-receiving element tilting it can be detected by the cover 15 constituting the tilt switch can be made smaller than because there is no light shielding plate.
As described above, various application developments are possible, but the present invention does not exclude such cases.
【The invention's effect】
As described above in detail, according to the present invention, the following effects can be obtained.
(1) Convex portions are formed on both side surfaces of a pendulum type weight, and a concave portion corresponding to the convex portion and a support plate provided with an arc-shaped first gear on an end surface are integrated by concave-convex fitting together with the arc-shaped. A receiving portion having a second gear meshing with the first gear formed on an end surface is disposed on the printed circuit board, and a connecting plate is pivotally supported on both side surfaces between the support plate and the receiving portion to drop the pendulum weight. Since the center of gravity of the pendulum weight can be rotated left and right in conjunction with the tilting of the tilt switch main body, the gears are always meshed with the connecting plate, and the pendulum weight is not slipped by the gear. Is rotated, a highly reliable tilt switch free from erroneous output due to vibration or impact can be provided.
(2) A convex portion is formed on both side surfaces of the pendulum type weight, and a concave portion corresponding to the convex portion and a support plate provided with an arc-shaped first gear on the end surface are integrated by concave-convex fitting together with the arc-shaped portion. A receiving portion having a second gear meshing with the first gear formed on an end surface is disposed on the printed circuit board, and a connecting plate is pivotally supported on both side surfaces between the support plate and the receiving portion to drop the pendulum weight. Since the center of gravity of the pendulum weight can be rotated left and right in conjunction with the tilting of the tilt switch main body, the pendulum weight itself is rotated more than the moving amount of the conventional pendulum weight, and the pendulum weight itself is moved. Since the rotation can rotate, the inclination can be configured in a small space, so that it is possible to provide an inclination switch that contributes to further reduction in the size and weight of the device.
(3) Convex portions are formed on both side surfaces of the pendulum-type weight, and a concave portion corresponding to the convex portion and a support plate provided with an arc-shaped first gear on an end surface are integrated by concave-convex fitting together with the arc-shaped. A receiving portion having a second gear meshing with the first gear formed on an end surface is disposed on the printed circuit board, and a connecting plate is pivotally supported on both side surfaces between the support plate and the receiving portion to drop the pendulum weight. Since the center of gravity of the pendulum weight can be rotated left and right in conjunction with the tilting of the tilt switch main body, the pendulum weight rotated by a gear is connected to the first gear formed on the support plate. The inclination is changed by changing the curvature of the second gear provided in the receiving portion, and the weight having a different specific gravity is added to change the center of gravity and the mass of the pendulum weight, thereby changing the moment of inertia and changing the inclination with different sensitivity. A switch can be provided easily.
(4) A mechanism that combines unevenness and a leaf spring to attenuate the inclination speed is installed around the pin hole of the connecting plate that rotates in conjunction with the pendulum weight, so that fine settings such as the detection angle can be made. A possible tilt switch can be provided.
[Brief description of the drawings]
FIG. 1 is a central sectional view showing a first embodiment of a tilt switch according to 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 sectional view showing a neutral state of the first embodiment of the tilt switch according to the present invention.
FIG. 4 is a cross-sectional view illustrating a tilted state of the tilt switch according to the first embodiment of the present invention; FIG. 5 is a cross-sectional view illustrating an application example of the tilt switch according to the first embodiment of the present invention;
FIG. 6 is a cross-sectional view illustrating an application example of the tilt switch according to the first embodiment of the present invention.
FIG. 7 is a sectional view showing a conventional tilt switch.
[Explanation of symbols]
1, 15 Cover 1a Fitting hole 2, 16 Pendulum weight 2a, 3e, 11a Convex portion 2b Caulking portion 2c Groove portion 2d, 3d Recess 2e Screw hole 2f Hole 3 Support plate 3a First gear 3b, 5a, 5b, 9c Pin hole 3c Hole 4, 6 Pin 5 Connecting plate 5c Leaf spring portion 7 Set screw 8, 14 Light shielding plate 8a, 14a Light shielding portion 9, 20 Receiving portion 9a Projecting portion 9b Second gear 9d Through hole 9e Concavo-convex portions 10, 17, 25 Light emitting / receiving element 10a Slit 10b Light emitting / receiving surface 11, 21 Printed circuit board 12, 27 Terminal 13 Weight for adjusting center of gravity 16a Reflecting surface 18 Reinforcement plate 19 Film substrate 22 Housing 23 Sphere 24 Guide 26 Base

Claims (2)

An inclination switch composed of a pendulum weight provided with a light emitting and receiving element including a light emitting part and a light receiving part on a printed circuit board and having a light shielding plate swinging between the light emitting part and the light receiving part, wherein the pendulum type A convex portion is formed on both side surfaces of the weight, and a concave portion corresponding to the convex portion and a support plate provided with an arc-shaped first gear on an end surface are integrated by uneven fitting, and the arc-shaped portion provided on the support plate is formed. A receiving portion formed on an end surface of a second gear meshing with the first gear is disposed on the printed circuit board, and a connecting plate is pivotally supported on both side surfaces between the receiving portion and the support plate, thereby allowing the pendulum type weight to move. A tilt switch wherein the center of gravity of the pendulum weight is rotatable left and right in conjunction with the tilting of the tilt switch body. 2. The tilt switch according to claim 1, wherein a hole is provided on a side surface of the pendulum weight, and a weight for adjusting the center of gravity can be provided in the hole.

Images