KR20010010925A - low power switch - Google Patents

Abstract

PURPOSE: A low-power switch is provided to be easily manufactured and have a high stability of an operation. CONSTITUTION: A lower housing(110) has an inclined bottom(111) therein and a spherical concave cavity(112) which is formed at a center of the bottom(111). An upper housing(120) is formed at an upper portion of the lower housing(110). Electric connectors(210,211) are installed at both sides of the lower housing(110). Contacting ends(210a,211a) of the electric connectors(210,211) are located at a bottom of the upper housing(120). The contacting ends(210a,211a) have spherical concave portions and contact with a spherical conductive medium. The spherical conductive medium freely moves in the bottom(111) and spherical concave cavity(112). The spherical conductive medium escapes from spherical concave cavity(112) according to an inclination of the lower housing(110) and moves to the bottom(111).

Description

Low power switch {low power switch}

The present invention relates to a low power switch, and more particularly, to a low power switch that is automatically operated according to a change in posture.

In general, a safety switch that operates according to a change in posture is applied as a safety device for stopping the operation of the electrical appliance when the electrical appliance, such as an electric heater, insecticide fumigator, humidifier. Such a safety device generally includes a safety rod and a leaf switch operated by the safety rod in contact with the floor on which the electrical appliance is installed while being reciprocally exposed from the bottom of the electrical appliance.

Referring to FIG. 1, a safety rod 2 capable of vertically moving up and down is installed in a case 1 of an electronic product provided with an electrical appliance support member 6 at a bottom portion thereof. The leaf switch 3 fixed by the support 7 is provided adjacent to the upper end of the safety rod 2. The leaf switch 3 is provided with a first leaf 31 and a second leaf 32 to which the wires 5 are connected to each other in elastic contact with each other when the safety rod 2 is raised.

Looking at the leaf switch 3 in more detail, the second leaf 32 with respect to the first leaf 31 is installed to be able to change the distance elastically, the safety rod 2 is the second leaf (32) It is installed to press / release the pressure. Therefore, when the safety rod 2 rises, that is, when the safety rod 2 is in contact with the bottom 4 and ascends into the case, the second leaf 32 is pressed and the second leaf 32 is pressed. The first leaf 31 comes into contact with the first leaf 31, and thus the first leaf 31 and the second leaf 32 are electrically closed.

And when the safety rod 2 is separated from the bottom 4, that is, when the electronic product falls off or falls from the bottom 4, the pressing force against the second leaf 32 by the safety rod 2 is increased. Since the second leaf 32 is released from the first leaf 31 by its elasticity, the first leaf 31 and the second leaf 32 are electrically open (OFF). Will be maintained.

As the first rod 31 and the second leaf 32 are contacted and separated by the operation of the safety rod as described above, the first leaf 31 and the second leaf 32 operate as safety switches. Will be.

However, the conventional safety device having such a structure requires the safety rod 2 to penetrate the bottom of the electrical appliance, and also provides a first leaf 31 and a second leaf 32 which are interfering with each other and supporting means for supporting the same. It has a complicated structure such as a provision. In addition, the safety rod (2) does not make a smooth reciprocating motion with respect to the case, especially when a so-called mechanical locking phenomenon occurs due to external foreign matter, etc., the lifting and lowering movement is not possible to the case irrespective of the conduction of the electrical appliance, Therefore, the function of the safety switch can not be performed.

2 and 3 show an example of a so-called mercury switch as another example of a conventional safety switch. 2 and 3, two leads 61 and 62 are electrically connected to the outside in a sealed container 60 made of a material such as glass, and mercury 63 is contained in the container 60. ) Is contained in a predetermined amount. Therefore, as shown in FIG. 2, when the container 60 is kept upright, mercury 63 is collected toward the leads 61 and 62 so that the leads 61 and 62 are electrically closed. ) 3, the mercury 63 is separated from the leads 61 and 62 in the state in which the container 60 is conducted to one side, and thus the leads 61 and 62 are Electrically open (OFF) state. Since such a safety switch is used as a switching medium that is extremely harmful to the human body, not only should the worker be protected from mercury during the manufacturing process, but measures must be taken to prevent environmental pollution due to its leakage. In particular, when the mercury switch having a container 60 susceptible to impact, such as glass, is damaged by the user's carelessness or external impact in the state of being mounted on an electrical appliance, mercury 63 flows out from the inside of the container 60. Therefore, measures should be taken.

It is an object of the present invention to provide a low power switch having a simple structure without fear of environmental pollution.

Another object of the present invention is to provide a low-power switch having high operation stability and easy manufacturing.

Another object of the present invention is to provide a low-power switch that is structurally safe and miniaturized.

1 is a partial cross-sectional view of an electrical appliance showing an example of a conventional safety switch,

2 and 3 are cross-sectional views showing an example of a conventional low power switch,

4 is a schematic exploded perspective view of a first preferred embodiment according to the low power switch of the present invention;

5 is a schematic side cross-sectional view of the low power switch of the present invention shown in FIG.

6 is a schematic plan cross-sectional view of the low power switch of the present invention shown in FIG.

7A and 7B are excerpted side views illustrating modifications of main parts of the low power switch of the present invention shown in FIG. 4;

8 is a schematic sectional view of a second preferred embodiment according to the low power switch of the present invention;

9 is a schematic plan sectional view of a third preferred embodiment according to the low power switch of the present invention;

FIG. 10 is an enlarged plan view of a portion of the low power switch of the present invention shown in FIG. 9; and

FIG. 11 is an enlarged side view illustrating a portion of the low power switch of the present invention shown in FIG. 9.

* Explanation of symbols for main parts of the drawings

110: lower housing 120: upper housing

111: bottom (of the lower housing)

112: Concept cavity

211,212,213,214 (electrical) connections

211a, 212a, 211b, 212b, 213b, 214b (contact points)

300: spherical media (non-spherical or fully spherical)

According to the present invention for achieving the above object, a housing having a conductive spherical medium, and a bottom portion to which the spherical medium can move; It is installed in the housing, the front end is provided with at least two electrical connection portions each provided with contact ends in contact with the conductive spherical medium, the contact ends are located lower than the bottom of the housing, and one point of the bottom of the container Provided is a low power switch, which is disposed at predetermined angle intervals.

In the low power switch of the present invention, the spherical medium is completely spherical, and the contact end preferably has a spherical recess corresponding to the surface of the spherical medium.

In addition, in the low-power type switch of the present invention, three or more connection parts are provided, and contact ends of the connection parts are disposed radially about an arbitrary point, and a concave spherical shape accommodating the spherical medium by the contact ends is provided. It is desirable to have a cavity provided.

Hereinafter, preferred embodiments of the low power switch of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

4 to 6, the switch according to the present invention has a bottom 111 inclined therein and a lower housing 110 having a concave spherical cavity 112 in the center of the bottom 111. And an upper housing 120 coupled to the upper portion thereof. Electrical connecting parts 210 and 211 are penetrated from both sides of the side wall of the lower housing 110, and contact ends 210a and 211a, which are front ends thereof, are located at the bottom of the cavity 112. The contact ends 210a and 211a have spherical recesses, and a non-spherical or fully spherical conductive spherical medium 300 is in contact therewith, and the spherical medium 300 has the bottom 111 and the cavity part. It is possible to move 112 freely. As the spherical medium 300 is inclined of the lower housing 110, the spherical medium 300 moves out of the cavity 112 to the bottom 111 as shown in FIG. 6, and the lower housing 110 is horizontal. When the state or the state close to the horizontal enters the cavity 112 by gravity as shown in FIG. Since the spherical medium 300 located in the cavity 112 is in contact with the contact ends 210a and 211a of both connecting parts 210 and 211, the connecting parts 210 and 211 are electrically connected to each other. As described above, when the lower housing 110 is inclined and the spherical medium 300 deviates from the cavity 112, the connecting portions 210 and 211 are electrically disconnected.

As described above, the switch of the present invention may be electrically connected or disconnected according to an inclined state of the lower housing 110, and thus may be applied as a switching device, for example, a safety device, according to a change in posture of an electric product.

In the switch of the present invention as described above, the spherical medium 300 and the contact end (210a, 211a) is in the point contact or surface contact state with each other, it is preferable to be in the surface contact state to reduce the contact resistance. As shown in FIG. 7A, for surface contact, the surface curvature of the contact ends 210a and 211a is equal to the curvature of the spherical medium so as to be completely spherical treated, or as shown in FIG. 7B. As described above, the contact ends 210b and 211b are larger than the curvature of the spherical medium so that the spherical medium 300 can perform rolling motion with respect to the contact ends 210b and 211b. This difference in curvature is determined by the design conditions. 5 illustrates a state in which the spherical medium 300 and the contact ends 210a and 211a are completely spherical treated, that is, the curvature is the same.

Example 2

FIG. 8 shows a structure in which three connecting portions 210, 211, and 212 are arranged at equal isometric intervals about the cavity 112 of the lower housing 110. In this embodiment, the three spherical parts 210, 211, and 212 are electrically energized or disconnected by one spherical medium 300. In this case, when the lower housing 110 is completely horizontal in three directions, a spherical medium is positioned at the center of the connecting parts 210, 211, and 212, and both are energized. When the medium 300 does not contact all of the contact ends 210b, 211b, and 212b of the three connecting portions 210, 211, and 212, only the two of either side thereof, and the lower housing 110 is inclined more. It is completely out of the cavities 112 and none of them become energized. This embodiment is suitable for electrical products in which a more precise posture recognition or a horizontal state is maintained.

For this structure, each contact end of the connecting portions 210, 211, and 212 forms a spherical cavity for accommodating the spherical medium, and does not form a full spherical treatment on the spherical medium 300, as shown in FIG. 7B. As described above, it is preferable that the spherical medium has a small curvature compared to the spherical medium 300 so that the spherical medium can be clouded to some extent and the position thereof can be changed.

Example 3

9 shows a structure in which four connection parts 210, 211, 212, and 213 are disposed at 90 degree intervals about the cavity 112 of the lower housing 110. This embodiment is useful for electrical appliances that require a switching operation corresponding to a more precise attitude change than the above-described third embodiment. As shown in FIG. 10, the cavity 112 has a diameter larger than that of the spherical medium 300, so that the spherical medium may move according to the inclination of the lower housing 110 in the cavity 112. When the lower housing 110 is completely horizontal in all directions, the spherical medium 300 is located at the center of the cavity 112 so that the four connecting portions 210, 211, 212, and 213 are connected to the spherical medium 300. Each of the contact ends 210b, 211b, 212b, and 213b that are in contact with each other is electrically energized or disconnected. In this case, when the lower housing 110 is completely horizontal in four directions, the spherical medium 300 is positioned at the center of the connecting portions 210, 211, 212, and 213, and both are in an energized state. Even when inclined only, the spherical medium 300 does not come into contact with each of the contact ends 210b, 211b, 212b, and 213b of the four connection portions 210, 211, and 212, as shown by the dotted lines in FIGS. 10 and 11. As it is biased toward any one side in the cavity 112, only the two contact ends of one side thereof come into contact with each other, and when the lower housing 110 is inclined further, it completely escapes from the cavity 112 so that nothing is energized. do. This embodiment is suitable for electrical products in which a more precise posture recognition or a horizontal state is maintained.

For this structure, each contact end of the connecting portions 210, 211, and 212 is not spherically treated with the spherical medium 300 as in the second embodiment, and the spherical medium as shown in FIG. 7B. It is desirable to have a small curvature compared to 300 so that the spherical medium can be clouded to some extent within the cavity 112 and the position thereof can be changed.

As described above, the switch of the present invention can be used as a posture sensor that obtains the switching state according to the tilt of the switch as logical information, and is installed in a power line of an electrical product having a low risk of sparking and the like. It can also be used as a safety switch.

The switch of the present invention as described above is simple in structure, and therefore can be miniaturized. In addition, it is easy to manufacture by a simple structure, and the operation stability is also high. In addition, since it can be manufactured as one finished product, there is no additional requirement of a separate fastening element for a specific electric product as in the conventional switch. Therefore, the switch of the present invention is inexpensive, and greatly reduces the price increase burden of the electrical appliance to which the switch is applied.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined only in the appended claims.

Claims (7)

Conductive spherical media, A housing having a bottom portion through which the spherical medium can move; It is provided in the housing, the front end has at least two electrical connection portions each provided with contact ends in contact with the conductive spherical medium, The contact end is located lower than the bottom of the housing, low power switch, characterized in that arranged at a predetermined angle intervals around one point of the bottom of the container. The low power switch according to claim 1, wherein the spherical medium is completely spherical and the contact end has a spherical recess corresponding to the surface of the spherical medium. The method according to claim 1 or 2, And the curvature of the surface of the contact end is less than or equal to the curvature of the spherical medium. The method according to claim 1 or 2, The connection portion is provided with three or more, the contact ends of the connection portion is disposed radially around any point, the low power type characterized in that the contact end is provided with a concave spherical cavity for receiving the spherical medium switch. The method of claim 4, wherein The connection portion is provided with three or more, the contact ends of the connection portion is disposed radially around any point, the low power type characterized in that the contact end is provided with a concave spherical cavity for receiving the spherical medium switch. The method according to any one of claims 1, 2 and 5, The bottom portion of the housing is a low power switch, characterized in that formed inclined around the portion where the contact portion is located. The method of claim 3, The bottom portion of the housing is a low power switch, characterized in that formed inclined around the portion where the contact portion is located.