JPH0474901A - Tape measure with inner dimension measurement scale - Google Patents

Abstract

PURPOSE:To measure the inside size, for example, length in the depth of a U-shaped wall which cannot be measured near the entrance by indicating the value when the length is measured by a rule of a tape measure while a case of the tape measure is used as a reference. CONSTITUTION:This tape measure has a reading reference mark 2, a reading window 3 and a protruding part 6 in a case 1. Scales and numerals 5 are indicated on a rule 4 to show the length from an origin which is set at the protruding part 6 which is agreed with the reference mark 2 and a starting point of the rule 4 at one end of the case 1 to a front end of the rule 4. The rule 4 is housed inside the case 1. Therefore, the length from the front end to the origin is a value of the scales and numerals 5 indicated by the reference mark 2 agreed with the scales and numerals 5 of the rule 4. Since two origins are set in this tape measure, one similar to an origin of a conventional rule and the other in the case, the tape measure can be used even if an object to be measured is changed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an internal method for specifying dimensions when it is more convenient to include the length of the case (1) when measuring the length. Concerning a tape measure with measuring scales.

[Conventional technology]

Conventional tape measures have scales and numerical values with the tip of the drawer part of the built-in ruler as the origin of the measurement.

The same applies to small tape measures with built-in metal rulers. Therefore, a measurement value using a case cannot be obtained unless the length of the case is added to the scale and numerical value of the difference, and it does not have a display function that includes the length of the case.

[Problem to be solved by the invention]

When using a conventional tape measure, measure the inner diameter of the bottom of the box,
When making internal measurements that require deep dimensions that cannot be measured with the mouth, such as the dimensions of the back wall of a U-shaped wall, it is possible to bend the ruler and use it to measure the arc of the pole when folded. Sometimes parts are supplemented by visual measurement, making it difficult to measure the original dimensions. Furthermore, even when using the tape measure in one hand, keeping in mind the length of the case, the bulges on the fingers and back of the hand get in the way and make it difficult to measure, making it very difficult to use depending on the object and location being measured.

The present invention is aimed at solving the inconvenience of using a conventional tape measure by allowing the value of the length to be immediately determined using a ruler based on the case of the tape measure as a reference.

[Means to solve the problem]

In order to achieve the above object, the present invention sets the origin of the dimension and the reading reference point on the case, and the scale and value of the ruler that match the reading reference point are the lengths between the origin and the tip of the ruler. is displayed and readable.

[Effect]

Using the tape measure created as described above, for example, when measuring the back wall of a U-shape, press the case against either the left or right wall, pull out the measuring tape, and then insert the tip of the measuring tape against the opposite wall. By pressing it against the reading reference point, the scale and numerical value of the difference that match the reading reference point are the length values to be measured, and can be read and displayed immediately. This is true even if the order of work is reversed.

〔Example〕

The embodiment will be described with reference to the drawings. A reading reference mark (2), a reading window (3), and a protrusion (6) are formed on a case (1), and a case (1) that matches the reading reference mark (2) is formed. 1
) is located at one end of the ruler (4) and is the starting point of the ruler (4). Write down the difference (4)
This is a tape measure built into the above-mentioned case (1).

Therefore, the length from the tip to the origin shown in the figure is the reading reference mark (2) that matches the scale and numerical value (5) of the ruler (4).
The scale and numerical value (5) indicated by will be the value.

Next, to explain each part, the reading reference mark (2) is the scale of the ruler (4) and the numerical value (5
) may serve as a reference mark that can be read, so a reference line may be marked on a transparent resin plate and attached to the reading window (3). At that time, it is best to write it on the inside of the window so that it is in close contact with the ruler (4) to prevent errors caused by strabismus. In the drawing, a triangular mark is shown.

The opening and reading window (3) are made easier to read by making the scale and numerical value (5) of the stripes more visible than the scale and numerical value (5) that match the reading reference mark (2).

C. Regarding the protrusion (6), it is well known that the area including the origin when it hits an object has a smaller measurement error as it gets closer to the point. Based on this, the present invention is designed to change the origin to the protrusion (6). 6), and the origin is set at the tip of the tape measure according to the imaginary line shown in FIG. 2, which is more protruding than the finger of an example when the tape measure is held with one hand, making it easy to use. or,
By changing the shape of the protrusion (6) so that it can be taken in and out of the case (1), it is convenient to store it in a pocket of clothes etc. without being bulky.

In the case of the mechanism for putting the protrusion (6) in and out of the case (1),
One point on the protrusion (6) during use is the reading reference mark (2)
must act as the origin for the scale and numerical value (5) that match. Also, the reading reference mark (2) when the measuring tape of the present invention (4) and the case (1) are fixed and the reading reference mark (2) and the protrusion (6) including the origin are moved together. The scale and numerical value (5) that match indicate the length from the origin to the tip of the ruler (4). It is convenient to attach the scale and numerical values of the present invention to a rod-shaped elongated scale.

2. To explain the scale and numerical value (5), if the position of the reading reference mark (2) is set to a position that satisfies both the edge of the case (1) and the tip of the ruler (4), the ruler (4) ) The scale and numerical value (5) next to the length of case (1) including the origin can be written from the tip of the ruler (4). The scale and numerical value (5) in the example diagram are written on the surface of a conventional tape measure, and the corresponding reading reference mark (2) and reading window (3) are formed on the case (1). Misreading the numerical value on the scale of the ruler can be prevented, and it is easy to use both. In addition, when writing on the surface, color divisions, etc. are also effective.

As explained above, this is a tape measure with an internal measurement scale that has its origin set in the case (11) and has a built-in ruler that can be used in conjunction with a conventional ruler.

〔Effect of the invention〕

As explained above, the present invention is a tape measure in which the origin is set on both the conventional ruler and the case, so it can be used differently even if the object to be measured changes, and has the effect of compensating for the inconveniences when using the conventional tape measure. play.

[Brief explanation of drawings]

FIG. 1 is a top view of the tape measure with internal measurement scale, and FIG. 2 is a front view showing a partial cross section of the tape measure with internal measurement scale. ■・・・・・・Case 2・・・Reading reference mark 3・・・Reading window 4・・・・・・Difference 5
...Scale and numerical value 6 ...Protrusion 7.
・・・・・・Measurement fixing button

Claims (1)

[Claims] 1. The scale and numerical value (5) of the scale (4) that match the reading reference mark (2) of the reading window (3) and the reading reference mark (2) formed on the case (1) are A tape measure 2 with an internal measurement scale indicating the length from the origin to the tip of the ruler (4), which is attached to the case (1), and has a case (1) in which the origin of claim 1 is the tip of the protrusion (6). Tape measure with internal measuring scale