JPS6120524Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a regulating mechanism for an electrode drive handle in a moisture measuring device for measuring the moisture content of grain such as rice paddy.

In this moisture measuring device, the upper electrode is lowered by rotating the handle onto the lower electrode on which the sample is placed, and the upper electrode is strongly pressed against the sample on the lower electrode to crush it, and in this state, the electrical resistance value between the two electrodes is measured. In this case, in order to keep the sample in a constant state of crushing, the handle is placed in contact with a stopper to regulate the lower limit position of the upper electrode at a constant level. It has been proposed to do so.

However, this stopper always protrudes and only prevents the upper electrode from moving forward together with the handle, and the handle always freely rotates within the range up to the stopper. This causes problems such as the handle rotating freely when not in use and protruding unintentionally from the outline of the case when it is carried, and in the case of a structure in which electricity is automatically applied to the measuring circuit when the handle rotates to a specified position, the handle becoming loose causes electricity to flow, unnecessarily draining the battery.

In order to eliminate these drawbacks, the present invention provides an improved regulation mechanism for the electrode drive handle in a water supply device that uses a stopper to lock the handle with one touch when not in use.

Hereinafter, one embodiment of the present invention will be specifically described with reference to the drawings. In Figures 1 to 4, reference numeral 1 denotes a housing, which consists of a thin box-shaped main body 2 that is integrally covered with a top cover 3, and a bottom cover 4 that is removably attached below. . Top cover 3
A transparent window 5 is formed approximately in the center of the window 5.
A light-emitting numeral display element 6 is provided below, and a power indicator light 7 is provided near it to digitally display the measurement results. A substantially semicircular recess 8 is provided in one longitudinal direction of the top cover 3.
is formed, and a bar-type handle 9 is provided inside this recess 8 so as to be horizontally rotatable. A bulkhead 10 is provided in most of the interior of the main body 2 on the side opposite to the recess 8.
is installed horizontally, and the partition wall 10, the top cover 3, and the bottom cover 4 form chambers 11 and 12, respectively. A circuit board 13 configuring a measurement circuit near the partition wall 10 inside the upper chamber 11
is fixed horizontally, and a battery case 14 is attached to the partition wall 10 on one side inside the lower chamber 12. Battery electrodes 1 are provided at both ends inside the battery case 14.
5 and 16, and a battery is inserted between them, and auxiliary tools such as a huller, a brush, and a spoon are stored in a space next to the battery case 14 when not in use.

Here, the head 16' of one battery electrode 16 penetrates the partition wall 10 and protrudes toward the chamber 11, and a connection spring 17 is installed in advance at a position that coincides with the head 16 on the back side of the circuit board 13. As a result, when fixing the circuit board 3 to the partition wall 10, the battery electrode 16
The head 16' of the head 16' and the connection spring 17 come into contact with each other to establish electrical continuity.

Further, a hole 18 penetrating vertically is bored in the center of the block 2' on the side of the recess 8 of the main body 2, and a nut 19 is slidably fitted into the hole 18. A screw shaft 21 having an upper electrode 20 at its lower end is screwed into the nut 19, and the center portion of the handle 9 is integrally connected to its upper end by a fixing fitting 22.
Such a nut 19 is elastically supported by hooking its outer circumferential portion onto the inner circumferential portion of a spring plate 24 fixed to the main body side by means of a fixture 23. As a result, the nut 19 is fixedly held by the spring plate 24, so that the upper electrode 20 moves up and down together with the screw shaft 21 according to the rotation of the handle 9, and when the lowering of the upper electrode 20 is restricted, the nut 19 rises. By bending the spring plate 24, the upper electrode 20 is strongly pressed.

Below the electrode 20, an opening 25 on the bottom surface of the tube and an opening 25' on the side surface of the tube communicating with the hole 18 are provided, through which spilled paddy etc. can be discharged and the upper electrode 20 can be brushed. A sample plate 26 is attached to this opening 25'. The sample dish 26 is formed into a T-shape in plan view, and the lower electrode support plate 2 is attached to the central trunk 26a.
The lower electrode 28 supported by the shaft 2 is installed so as to form a recess, and the end of one branch 26b is connected to the shaft 2.
A bent handle 30 is formed at the end of the other branch 26c, and the sample plate 26 is rotated about the shaft 29 to open the lower electrode 28 in the opening 25'. It will be possible to insert and remove it. When the lower electrode 28 is inserted here, it is set to face the upper electrode 20, and at this time the handle 30 protrudes a little beyond the housing outline as shown by the solid line in FIG. The sample plate 26 can be pulled out by hooking it.

By the way, a cover 31 is mounted on the lower part of the handle above the spring plate 24, and the handle 9 and screw shaft 21 are arranged so that the handle 9 is stopped at a predetermined position when the upper electrode 20 reaches a predetermined lowered position. This prevents variations in the stopping position of the handle 9.
Therefore, in the present invention, the rotation position of the handle 9 is set at the stop position as shown by the solid line in FIG. If the upper electrode 20 is located approximately perpendicular to the axis, the lower electrode 28
A stopper 32 is provided at such a stop position of the handle 9 so as to make light contact with the handle 9 .

The stopper 32 is formed stepwise and inserted into the hole 33 on the main body side, and a spring 35 is interposed between the lower end of the stopper 32 and the blind screw 34, and normally the stopper 32 protrudes and is inserted into the hole 33 on the main body side. By restricting the rotation and pushing down the stopper 32 against the spring 35, the handle 9 can be rotated beyond the stop position. Note that the direction in which the stopper 32 protrudes and retracts is not limited to the vertical direction, and can be of a sliding type as well as a push type.

Further, as shown in FIG. 1, the stopper 32 prevents the handle 9 from rotating on its left side.
In order to prevent the handle 9 from rotating counterclockwise, not only its right side surface but also its upper surface may be brought into contact with the lower surface of the handle 9.

Furthermore, a magnet 3 is attached to the bottom of one end of the handle 9.
A reed switch 37 is installed on the side of the circuit board 13 that faces the magnet 36 when the handle 9 comes into contact with the stopper 32.
7, the circuit on the circuit board 13 is automatically energized.

Since the present invention is constructed as described above, when measuring the moisture content of a sample such as rice, turn the handle 9 counterclockwise to raise the upper electrode 20 and pull out the sample plate 26. Then, a sample is placed on the lower electrode 28 of the sample dish 26 and inserted, and the upper electrode 20 is lowered by turning the handle 9 clockwise. Then, just before the handle 9 contacts the stopper 32, the upper electrode 20 contacts the sample and its movement is restricted. From this point on, the sample is crushed by applying a little force to the handle 9 and turning it until it contacts the stopper 32. and spring plate 2
Both electrodes 2 are held together with only the elastic pressing force of 4.
The moisture content is detected by measuring the electrical resistance value between 0 and 28, and this result is displayed on the window 5 by the luminous number display element 6.
will be displayed. After the measurement is completed in this way, turn the handle 9 counterclockwise again to raise the upper electrode 20, pull out the sample plate 26, and raise the upper electrode 20.
Clean the surface of 0.28 and prepare it for the next measurement.

When the measurement work is finished, the empty sample plate 26 is inserted into the housing, the handle 9 is turned clockwise, and the upper electrode 20 is lowered. When the handle 9 comes into contact with the stopper 32, the stopper 32 is pushed down against the spring 35 to allow the handle 9 to pass and the stopper 32 to protrude again. Then, the handle 9 is prevented from rotating in the opposite direction by the protruding stopper 32, and at the same time, shortly after the handle 9 passes the stopper position, the upper electrode 20 comes into contact with the lower electrode 28, and the upper electrode 20
As the handle 9 is lowered, rotation of the handle 9 is restricted, and the handle 9 is thus held in a state substantially perpendicular to the housing axis as indicated by the two-dot chain line in FIG. Further, the sample dish 26 is also prevented from escaping due to the contact between the electrodes 20 and 28.

In this manner, the present invention prevents the handle 9 from loosening and inadvertently protruding from the outline of the casing or the sample dish 26 from escaping when carried when not in use, which contributes to miniaturization. Damage is also prevented. Also, due to the structure, the handle 9 is
2 and electrodes 20, 28, and no special mechanism is added for this purpose, the structure is simple and advantageous in terms of cost. In the embodiment of the present invention, when the handle 9 comes into contact with the stopper 32 at the stop position, the magnet 36 operates the reed switch 37 to energize it, but as mentioned above, the handle 9 is locked when not in use. magnet 36
Since the reed switch 37 is forcibly released,
Battery consumption due to malfunction of the reed switch 37 is completely prevented.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the mechanism according to the present invention, Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is a cross-sectional view of Fig. 1, and Fig. 4 is an illustration of a sample dish. FIG. 2 is a cross-sectional view of FIG. 1, omitted. DESCRIPTION OF SYMBOLS 1... Housing, 9... Handle, 13... Circuit board, 20... Upper electrode, 26... Sample plate, 28...
...lower electrode, 32...stopper.

Claims (1)

[Scope of utility model registration request] A lower electrode on which the sample is placed, an upper electrode located opposite the lower electrode and raised and lowered by the rotation of the handle, and the sample is crushed and clamped by these upper and lower electrodes, and the electrical resistance value at that time is measured. In the moisture measuring device, the moisture measuring device has a measuring circuit that detects the moisture content by measuring the water content, and a housing that incorporates the measuring circuit and supports the upper and lower electrodes. A stopper is movably disposed at a position where it stops with a predetermined gap from the lower electrode, and the stopper is protruded and brought into contact with the handle to restrict the forward rotation of the handle, and the stopper is temporarily stopped. By further rotating the handle in the forward direction, the upper electrode comes into contact with the lower electrode, and the protruding stopper prevents the handle from rotating in the opposite direction. Regulatory mechanism for the electrode drive handle in the device.