JPH023175Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a shock detector suitable for detecting the presence or absence of mechanical impact.

(B) Prior art In general, when a failure or malfunction occurs in electronic devices such as floppy disk devices or other precision devices, it is difficult to determine whether the cause is due to the device itself or due to external mechanical shock. If the problem can be investigated, countermeasures can be taken at a later date, which is convenient for maintenance management. By the way, conventionally,
A device for detecting whether a mechanical shock is applied from the outside, whether electrical or mechanical, has the disadvantage of being large-scale and expensive equipment.

(c) Purpose The purpose of the present invention is to solve the conventional problems and provide a detector that can detect mechanical impact in any direction with high accuracy, has a simple structure, is compact, and is inexpensive.

(D) Structure In order to achieve such an object, the present invention arranges a colored magnetic fluid and a corpus cavernosum within a transparent surrounding wall with a predetermined space therebetween, and a magnetic fluid is placed outside the surrounding wall. A shock detector is constructed by providing a magnet near the fluid.

(E) Embodiments The present invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a central vertical sectional view of the shock detector of this embodiment. Shock detector 1 of this embodiment
The whole has a capsule shape and includes a transparent surrounding wall 2 made of glass or the like. This enclosing wall 2 has a closed cross-sectional structure, and inside thereof there is a colored magnetic fluid 4 in the center, and on the left and right sides of this magnetic fluid 4 there are predetermined spaces 6 in which cavernous bodies 8a and 8b are arranged, respectively. has been done. Furthermore, a magnet (permanent magnet in this example) 1 is placed outside the surrounding wall 2 in a position close to the magnetic fluid 4.
0 is installed.

Therefore, if this shock detector 1 is attached to the device, the magnetic fluid 4 will be activated when no shock is applied.
is restrained by the magnetic field of the permanent magnet 10 and maintains a state separated from the cavernous bodies 8a and 8b by the space 6, as shown in the figure. When an external impact is applied, the magnetic fluid 4 is scattered due to the impact force, and the droplets adhere to the corpus cavernosum 8a, 8b. As a result, the corpus cavernosum 8a, 8b is colored. Therefore, by observing from the outside whether or not the corpus cavernosum 8a, 8b of the shock detector 1 is colored, it is possible to determine whether or not a shock has been applied to the device.

In addition to the embodiments described above, if an electromagnet is used instead of the permanent magnet 10, the strength of the magnetic field can be adjusted as desired.
It becomes possible to judge not only the presence or absence of an impact, but also the amount of impact force applied. Further, in the above embodiment, the surrounding wall 2 has a closed section structure, but as shown in FIG. 2, the surrounding wall 2' of the shock detector 1' has a structure having openings 2'a and 2'b. You can also. In this case, there is an advantage that the surrounding wall 2' can be reused. In the embodiment shown in FIGS. 1 and 2, the corpus cavernosum 8a, 8b is located on both sides of the magnetic fluid 4.
However, the present invention is not limited to this, and as shown in FIG. It may also be possible to detect only the impact from.
Furthermore, the permanent magnet 10 can be enclosed inside the surrounding wall 2 instead of just being provided outside the surrounding wall 2.

(f) Effects As described above, according to the present invention, if there is a mechanical shock, the state is displayed in color and the display is maintained. In addition, the magnitude of the impact can be adjusted to some extent. As described above, compared to the conventional device, the structure is extremely simple and compact, and the impact can be detected reliably at a low cost, which is an excellent practical effect.

Furthermore, in the present invention, the magnetic fluid is restrained at a predetermined initial position by the magnetic force of the magnet. It is possible to detect shocks in any direction, and has a wide range of applications.

Furthermore, since the magnetic force acting as the binding force of the magnetic fluid does not change depending on the ambient temperature, accurate shock detection is possible without being affected by temperature changes.

Moreover, since the magnets for restraining the magnetic fluid are installed outside the surrounding wall, by changing the magnetic force by replacing the magnets, the restraining force of the magnetic fluid can be adjusted and shock detection can be performed. The threshold value can be set freely, and a shock of a size corresponding to the installation location and installed equipment can be detected with high accuracy.

[Brief explanation of drawings]

1 to 3 are central vertical sectional views of a shock detector showing an embodiment of the present invention, respectively. 1, 1', 1''...Shock detector, 2, 2',
2''...Surrounding wall, 4,4''...Magnetic fluid, 6...Space, 8a, 8b, 8''...Cavernous body, 10...Magnet.

Claims (1)

[Scope of utility model registration request] A shock detector comprising: a colored magnetic fluid and a corpus cavernosum disposed within a transparent surrounding wall with a predetermined space therebetween; and a magnet provided outside the surrounding wall and near the magnetic fluid.