JPS6138401A - Enlarging mechanism of expansion and contraction or displacement - Google Patents

Abstract

PURPOSE:To increase enlarging ratio, by making tension act on both ends of an expanding and contracting body through a body, which is not expanded or contracted, fixing both ends to the connecting bodies under the state a string shaped body whose length is unchanged is slackened, and applying an external force to the central point in the lateral direction. CONSTITUTION:A fixed body 2 is linked to a print B of an expanding and contracting body (hair) 3, which is displaced by humidity. A movable body 4, a spring 5 and a fixed body 1 are linked to a point A. A string shaped or ribbon shaped body 6, whose length is not changed by humidity, is attached to a part between a point A' of a body 4 and a point B' of a body 2. A central point C is pulled in the direction CE. In this mechanism, an expression shown in the Figure is realized. Change dL' of the expanding and contracting body 3 is enlarged by 1/tan theta. The value is detected as a change dlambda in distance lambda between D and C.

Description

[Detailed description of the invention] [Industrial application field] Ru.

[Conventional technology]

Object II! When detecting shrinkage or displacement, it is often necessary to increase it by 1.For example, a hair hygrometer uses the expansion and contraction of the hair to measure the humidity, n1, depending on the temperature of the hot water. , increasing 1.11 times by L is actually done using a recorder, etc. ↓2.

The enlargement mechanism conventionally used in hair hygrometers is
As shown in the illustration of the figure. An example of the prior art will be described below with reference to the drawings.

In FIG. 3, 31 is an elastic body (for example, hair).

Thus, both ends A' and B' of the hair 31 are fixed, respectively.
When the midpoint C is pulled in the lateral direction, the expansion and contraction of the 11 hairs becomes a displacement of the midpoint C and is expanded. If the lengths of 87C and CB' are β, then the displacement of the midpoint C is the change in the distance λ between the midpoint on the straight line of 8', B''''' and the above midpoint C.

Therefore, as known from Fig. 3, λ=l 5i
n(7, e cos θ=0 ----11).

Since l and λ depend on the humidity H, θ also depends on I(.

Differentiating both equations in equation (1) with respect to H gives dλ=-〒-d7! −・−m−−−−・・−・・−(3
1i11 is obtained. This indicates that the magnification ratio is 1/sin θ.

However, in the conventional configuration such as cooking, the magnification rate and accuracy are limited because the magnification mechanism uses the displacement that increases the angle θ due to the elongation of the hair length 2p directly to fa. There is a problem that it is not possible to obtain enough hair, and since hair is required to have a certain length, there is also a problem that it is difficult to obtain hair, which is in short supply.

[Problem that the invention seeks to solve]

The present invention was made from the viewpoint of cooking, and an object of the present invention is to provide a widening groove with a high magnification rate and a high accumulation even when hair is short. be.

[Means for solving problems]

Therefore, the gist of the present invention is to connect a non-contractable object of appropriate length (l:1) to both ends of a stretchable object, and apply tension in the longitudinal direction through the connected object. The purpose of the expansion mechanism is to fix a thread-like or ribbon-like object of unchanging length to the above-mentioned connecting object in a loose state, and to apply an external force in the lateral direction to the midpoint of the object. It is used in hair humidity needles and recorders, etc.

[Effect]

By configuring it like a rice cooker, short hair can be obtained, and a novel magnification mechanism can be provided that can record humidity measurements with high magnification and high density.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of a hair humidity needle using the expansion/contraction or displacement expansion mechanism according to the present invention, and FIG. 2 is an explanatory diagram showing an embodiment of the hair humidity needle using the expansion/contraction or displacement expansion mechanism according to the present invention. It is an explanatory view showing another example of a hair hygrometer.

An example of the magnification mechanism of the present invention is shown in FIG.

In FIG. 1, 1 and 2 are fixed objects, 3 is a stretchable object (for example, hair) that is displaced by humidity, and 4 is a movable object.
5 is a spring, and 6 is a thread-like or ribbon-like object.

Thus, the movable object 4 is fixed to the fixed object 1 by the spring 5.
The hair 3 is also connected to the fixed object 2 by both ends ASB. The thread-like or ribbon-like object 6 is flexible and has a length that does not change due to humidity.
Its both ends are point A' on the movable object 4 and point B' on the fixed object 2.
is attached to.

Assume that the midpoint C of the thread-like or ribbon-like object 6 is stretched in the qE direction. Let D be the midpoint of Δ/B/. Δ'C
, CB' have the same length l, and do not depend on the humidity as described above.

If the length of the hair 3 is 2 r, t , A / [3/ distance is 2 L, LL' is constant. L' changes depending on humidity.

In this case as well, the distance from DC is assumed to be λ, and the angle DΔ'/C is assumed to be θ.

In this case, λ=j! sinθ+ L=Jcosθ −−−−−
--(4), so if we differentiate with H, we get dHdH, so we get. From these two equations, it is known that . This has a magnification of 1/tanD
This shows that it is possible to expand the

FIG. 2 shows a different embodiment of the enlarging mechanism of the present invention.

In Fig. 2, 21 and 22 are fixed objects, 23 is a movable object,
24 is a spring, and 5 and 26 are an elastic body (hair) 3 and a thread-like or ribbon-like object 6 similar to those in the previous embodiment.

The movable object 23 is connected to the fixed object 21 by a spring 24, and is also connected to the fixed object 22 by both ends A, B of the extensible body 5, and is further connected to the fixed object 21 by a spring 24. A ribbon-shaped object 26 has both ends fixed at point A'' of the fixed object 21 and point B // of the movable object 23, and its midpoint C is at A/'B''! r! It is pulled in the vertical direction (CE direction).

A//C, CB" have the same length!, and l remains unchanged. Let the length of the stretchable body 5 be 2L', and the distance of A/'B" be 2.
Since it is assumed to be L, L+L' remains unchanged.

Let λ be the distance between the midpoint on the straight line of A // s" and the above midpoint C, and let θ be the angle DA//C. In this case, λ
=#sinθ, L=7! cosθ --------
-(7). Differentiating both equations with respect to H gives the following equation. As a result, it is known that dL' is expanded by a magnification of 1/lanθ.

The configuration of the present invention is not limited to the cooking example, and the shape, dimensions, etc. of each component can be freely changed within the scope of the purpose of the present invention, and the present invention It encompasses all of the above.

〔Effect of the invention〕

Since the present invention is configured like a cooking stove, it is possible to provide a novel magnification mechanism that can perform high magnification and highly accurate humidity measurement and magnified recording using a simple detection mechanism. .

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a hair hygrometer using the expansion/contraction or displacement expansion mechanism according to the present invention, and FIG. 2 is an explanatory diagram showing an example of a hair hygrometer using the expansion/contraction or displacement expansion mechanism according to the invention An explanatory diagram showing another embodiment of a hair hygrometer. ff13 is an explanatory diagram showing an example of an enlargement mechanism employed in a conventional hair hygrometer.

Claims (1)

[Claims] A non-stretchable object of appropriate length is connected to each end of a stretchable object, and tension is applied in the longitudinal direction through the connected object, and the length of the object, such as a thread-like or ribbon-like object, remains unchanged. The expansion mechanism is configured by fixing both ends to the connecting object and applying an external force in the lateral direction to the midpoint of the expansion mechanism.