JP2001155600A - Inclination switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inclination switch with excellent stability free from noise and malfunction. SOLUTION: In an inclination switch consisting of a base 11 to which light receiving and emitting elements 14 are installed, a ball 4 put above the elements 14 with free rolling motion and a cover 1 fitted to the base 11 and detecting the inclination by switching the elements 14 with the travel of the ball 4, non- successive projections 6, 7, 8 are plated on the rolling area of the ball 4. A pinching part 10 of a partitioning plate 5 made of a soft material is tucked into the space between the base 11 and the cover. The non-successive projections 6, 7, 8 are formed on the plate 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt switch provided for detecting a tilt or a falling state of a device and shutting off power.

[0002]

2. Description of the Related Art Conventionally, as a tilt switch utilizing the rolling of a sphere, there is an optical switch which detects a concave surface or a mortar-shaped receiving surface by rolling the sphere as shown in FIG.

[0003]

Heretofore, in a tilt switch utilizing the rolling of a sphere, the sphere is liable to jump up, and a small vibration or impact may generate an erroneous signal, so that a separate correction circuit must be provided. . Further, since the sphere freely rolls inside the switch body, noise has been generated. Furthermore, the tilt switch body needs to have a sealed structure so that the surface of the sphere having the reflective surface is not corroded or contaminated by the external environment, and the present invention, which requires a separate sealing member such as packing, solves this problem. It was invented to solve the problem.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a base having a light receiving and emitting element disposed thereon, a sphere rotatably disposed above the light receiving and emitting element, In a tilt switch comprising a cover fitted to the base and detecting the tilt by opening and closing the light emitting / receiving element by movement of the sphere, a discontinuous projecting portion is planted on a rolling arrangement portion of the sphere. In addition, a partition plate formed of a flexible member is disposed so as to be sandwiched between the base and the cover, and the discontinuous projection is formed on the partition plate.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The tilt switch according to the present invention suppresses unnecessarily rolling and bouncing of a sphere by forming a discontinuous projecting portion on a rolling arrangement portion of the sphere.
By forming the discontinuous projection on the partition plate formed of a flexible member, the tilt switch main body can be easily made to have a closed structure, so that an inexpensive and high-quality tilt switch can be provided. Furthermore, since the sphere is not received on a continuous surface such as a concave surface or a mortar surface as in a conventional tilt switch, even if there is internal dew or abrasion powder, the effects thereof can be minimized. .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings. FIG. 1 is a front sectional view showing a tilt switch according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a sectional view showing its tilted state.

In these figures, a terminal 13 is fixed to a base 11 formed in a bottomed cylindrical shape, with one end being led out from the bottom surface and the other exposed inside the base 11. The light emitting / receiving element terminal 15 is welded to the exposed portion, and the light emitting / receiving element 14 is fixed to the center of the base 11.

[0008] A disk-shaped partition plate 5 formed of a flexible member such as an elastomer is disposed on the light receiving / emitting element 14, and the sphere 4 is further mounted on the light receiving and emitting element 14 so as to roll freely. A hole 9 serving as an optical path of the light emitting / receiving element 14 is formed substantially in the center of the partition plate 5 and a holding portion 10 is formed on the outer periphery in a flange shape. Part 6,
7 and 8 are formed so as to be sequentially higher in the outer peripheral direction.

The cover 1 is covered from above with the bowl lying down, and the engaging projection 3 provided on the cover 1 is attached to the base 11.
Of the partition plate 5 at the same time
Is pressed against the base 11 and the cover 1 to complete the tilt switch of the present invention. A convex portion 2 is formed at the center of the inner upper surface of the cover 1 so that the sphere 4 is prevented from stagnating at the center of the cover 1 when the tilt switch is turned upside down.

[0010] The tilt switch of the present invention thus configured is configured at multiple points, in which the portion that receives the rolling of the sphere 4 is composed of the discontinuous protruding portions 6, 7, 8 formed of a flexible member. For this reason, it is possible to suppress the bounce of the sphere 4 to prevent noise and also to suppress the unstable movement of the sphere 4.

FIG. 4 shows a state where the sphere 4 is violently bounced and comes into contact with the partition plate 5. The non-continuous protrusions 7 and 8 flexibly receive the sphere 4 so that the sphere 4 is prevented from being bounced, and damage due to collision of the sphere 4 can be prevented.

Also, even if dew condensation occurs inside the tilt switch due to a sudden change in the outside temperature, the discontinuous projection 6,
At the tips of 7 and 8, water droplets of dew condensation hardly stay, and there is no danger of adversely affecting the rolling of the sphere 4.

Further, as shown in FIG. 4, abrasion powder due to the collision between the sphere 4 and the cover 1 and dust entering in the assembling process also accumulate at the roots of the discontinuous projections 6, 7, 8 as shown in FIG. Unlike the tilt switch, the rolling of the sphere 4 prevents dust and the like from gathering in the hole 9 of the partition plate 5 and accumulating on the upper surface of the light emitting / receiving element 14.

In addition, the holding portion 10 of the partition plate 5 is
And the base 11 are pressed against each other, so that there is an excellent feature that the entire tilt switch can have a sealed structure without using any other sealing member or the like. Therefore, the surface of the sphere 4 is not corroded by the external environment,
A high-quality tilt switch can be provided at low cost.

FIGS. 5 and 6 are plan views of non-continuous projections 26, 27, 28, 46, 47, 48 and 49 showing another embodiment. Black-painted portions are discontinuous protrusions 26, 2
7, 28, 46, 47, 48, 49, which are non-continuous projections 26, 27, 28, 46, 47, 4, both of which are concentric arcs
This is an example in which 8, 49 are formed, and the same effects as in the above embodiment can be obtained. Various other formation patterns are conceivable, but the present invention does not exclude these applications.

[0016]

As described above, according to the present invention, the following effects can be obtained. (1) A base provided with a light emitting and receiving element, a sphere rotatably disposed above the light receiving and emitting element, and a cover fitted to the base, wherein the light emitting and receiving element is moved by movement of the sphere. In the tilt switch that detects the tilt by opening and closing, a discontinuous projection is implanted on the rolling arrangement portion of the sphere, so that it is possible to suppress the bounce of the sphere and prevent noise, Unstable movement can also be suppressed. (2) Since the partition plate formed of a flexible member is disposed so as to be sandwiched between the base and the cover, and a discontinuous protruding portion is formed on the partition plate, the entire tilt switch can be used without using a separate sealing member or the like. Can be a closed structure. (3) Since the partition plate formed of the flexible member is disposed so as to be sandwiched between the base and the cover and the discontinuous projection is formed on the partition plate, even if the sphere is violently flipped and collides with the partition plate. The non-continuous protruding portion flexibly receives the sphere, thereby preventing the sphere from bouncing and preventing damage due to collision of the sphere. (4) Since a discontinuous protrusion is planted on the rolling arrangement portion of the sphere, even if dew condensation occurs inside the tilt switch due to a sudden change in the outside air temperature, the tip of the discontinuous protrusion is a water droplet of dew condensation. Is difficult to stay and there is no danger of adversely affecting the rolling of the sphere. (5) Since the discontinuous projection is implanted on the rolling arrangement portion of the sphere, abrasion powder and dust and the like entering in the assembling process are gathered and received in the hole of the partition plate by the rolling of the sphere. There is no deposition on the upper surface of the light emitting element.

[Brief description of the drawings]

FIG. 1 is a front 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 tilted state of the first embodiment of the tilt switch of the present invention.

FIG. 4 is a partial cross-sectional view showing a state where a sphere of the tilt switch according to the present invention is in contact with a partition plate.

FIG. 5 is a plan view of a non-continuous projection showing another embodiment of the tilt switch of the present invention.

FIG. 6 is a plan view showing a non-continuous projection of a tilt switch according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a conventional tilt switch.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 61 Cover 2 Convex part 3 Engagement projection 4, 64 Spherical body 5, 25, 45 Partition plate 6, 7, 8, 26, 27, 28, 46, 47, 48, 4
Reference Signs List 9 discontinuous projecting part 10 holding part 11, 71 base 12 engaging hole 13 terminal 14, 74 light emitting / receiving element 15 light emitting / receiving element terminal

Claims (2)

[Claims] 1. A base having a light receiving and emitting element disposed thereon, a sphere rotatably disposed above the light receiving and emitting element, and a cover fitted to the base, wherein the receiving element is moved by movement of the sphere. A tilt switch for detecting a tilt by opening and closing a light emitting element, wherein a discontinuous protruding portion is implanted on a rolling arrangement portion of the sphere. 2. A partition plate formed of a flexible member is disposed so as to be sandwiched between the base and the cover, and the discontinuous projection is formed on the partition plate. Tilt switch.