JPS6139949Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a self-holding vibration sensor.

In a conventional vibration sensor, for example, as shown in FIG. 1, a conductive plate spring 4, one end of which is supported by a support part 3, is arranged with respect to a plate-shaped fixed contact 2 supported by a fixed part 1. A fixed contact 2 is attached to the tip of the leaf spring 4.
A movable contact 5 that contacts the contact point 5 is integrally attached and a weight 6 is added, and when the leaf spring 4 receives a vibration impact in the thickness direction of the leaf spring 4, that is, in the Y-axis direction, the leaf spring 4 vibrates in the Y-axis direction, and the contact point 2 and Vibration is electrically sensed by opening and closing between 5 and 5. t ₁ and t ₂
are output terminals derived from the fixed contact 2 and the leaf spring 4, respectively. In this case, adjust the vibration sensitivity using the weight 6.
The elasticity of the leaf spring 4 is adjusted by adjusting the weight of the leaf spring 4 and the elasticity of the leaf spring 4. In particular, the elasticity of the leaf spring 4 is adjusted by adjusting the pressure by adjusting the adjusting screw 7 provided in relation to the leaf spring 4, as shown in FIG. This is done by increasing or decreasing.

However, with this configuration, in addition to sensing one-dimensional vibrations as shown in the figure, when sensing two-dimensional vibrations, the mechanism is inevitably extremely complicated, and vibration sensing is also difficult. It is stable.

The present invention takes these points into consideration and provides a vibration sensor that senses two-dimensional vibrations and has a self-holding function to ensure vibration sensing.

Hereinafter, the vibration sensor according to the present invention will be explained with reference to the embodiment shown in FIG.

In the present invention, both plate portions 1 at one end of mutually orthogonal plate portions 11A and 11B made of an insulating material, for example.
A fixed plate 11 having a substantially L-shaped cross section and integrally having a fixed contact 12 is provided at the boundary between 1A and 11B. A linear elastic movable body, that is, a conductive linear spring 15, which has one end fixed to a support portion 13 and a movable contact 14 formed at the other end, is arranged opposite to the fixed plate 11. In this case, the linear spring 15 is bent at its intermediate portion in advance so that the movable contact 14 can elastically contact the stationary contact 12 at all times from a 45° direction, and as a result of two-dimensional vibration, both contacts 12 and 14 are formed so as to be electrically separated from each other. A weight 16 made of a magnetic material having an appropriate shape is movably inserted through the linear spring 15 so as to be supported by the fixed plate 11. A self-holding means, that is, a magnet 17 that magnetically attracts the magnetic weight 16 is arranged opposite to the magnetic weight 16 . t ₁ and t ₂ are the fixed contact 12 and the linear spring 1, respectively.
An output terminal 18 led out from 5 is a reset means for separating the attracted weight 16 from the magnet 17 and returning the movable contact 14 to its original state.

In this configuration, when the movable contact 14 contacts the fixed contact 12 and receives a two-dimensional (X-axis direction, Y-axis direction) vibration impact with the terminals t ₁ and t ₂ in a conductive state, the linear spring 15 vibrates and its movable contact 1
4 is separated from the fixed contact 12, the terminals _t1 and _t2 become non-conductive, and two-dimensional vibrations can be sensed. At this time, as the magnetic weight 16 separates from the fixed plate 11 due to vibration, it is simultaneously attracted by the magnet 17, and the movable contact 14 is held in a state separated from the fixed contact 12, that is, a non-conducting state between the terminals _t1 and _t2 . is self-maintained. In this case, the vibration sensing sensitivity also increases due to the attractive force between the weight 16 and the magnet 17. After sensing the vibration, the reset means 18 is activated to reset the weight 16.
is separated from the magnet 17, and the movable contact 14 is returned to its original state (in contact with the fixed contact 12). In this vibration sensor, the sensitivity of vibration sensing can be adjusted simply by changing the mounting position of the weight 16 along the linear spring 15.

As described above, according to the present invention, two-dimensional vibration can be sensed with a simple configuration, the sensitivity can be easily adjusted, and the vibration can be reliably sensed by the self-holding function.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a conventional vibration sensor.
FIG. 2 is a perspective view showing an example of the vibration sensor of the present invention. 11 is a fixed plate, 12 is a fixed contact, 14 is a movable contact, 15 is an elastic movable body, 16 is a magnetic weight, and 17 is a magnet.

Claims (1)

[Scope of utility model registration request] a fixed plate having a substantially L-shaped cross section and having a fixed contact at the boundary between the two plates that intersect with each other; an elastic movable body having one end supported and a movable contact contacting the fixed contact at the other end; A magnetic weight movably disposed on an elastic movable body, and a magnet disposed facing the magnetic weight and attracting the magnetic weight during vibration to maintain an electrically separated state between the two contacts. A vibration sensor comprising: