JPH0350402Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a length measuring device for measuring straight lines, curved lines, etc., which is equipped with a scale disc that is tangentially rolled along a part to be measured.

[Technical background of the invention and its problems]

Conventional length measuring instruments equipped with a scale disc as described above have the disadvantage that the number of revolutions of the scale disc is displayed by a gear-type counting device, resulting in a complicated device structure and high cost. It was hot. Therefore, in order to eliminate the above-mentioned conventional drawbacks, the applicant has developed a scale disk.
He devised a length measuring device that could count the number of revolutions corresponding to a length of 10 cm by counting the number of times the swinging body operated.
It has been filed as a utility model No. 74882.

Although this length measuring device devised in the earlier application has the effects described in the specification of the application, there are cases where it is doubtful whether the length of straight lines, etc. measured by the rotation of the scale disc is accurate. To check this, you can remeasure using a different tape measure, but you don't always have a tape measure nearby, and even if you do have one, you have to carry two different length measuring devices. The problem was that it was extremely inconvenient.

[Purpose and outline of the idea]

This invention was made for the purpose of solving the problems of the earlier invention, and the outer circumference length was set to 10 cm or an integral multiple thereof, and a length measurement scale was provided along the outer circumference of the front surface, and the outer circumference of the back surface was A scale disc with one count operation pin protruding from the outer circumference of 10cm, and a part of the scale disc that is exposed so that it can roll tangentially along the part to be measured, and is held in a pivoted hand. When the scale disk, whose base end is supported by a pin on the measuring device body so as to be movable up and down, rotates a distance of 10 cm from the starting point, the count operation pin comes into contact with the measuring device body, which is moved and operated by The length measuring instrument devised in the earlier application, which is equipped with an oscillating body for 10 cm length counting that is oscillated by engagement, has been improved as follows, namely, the scale disk mounting portion of the measuring instrument body. A tape measure storage part is provided on the back side of the main body, a take-up reel is pivotally supported in the tape measure storage part, and a tape measure of a predetermined length wound on the take-up reel is extended to the outside from the main body entrance/exit hole, The gist of this invention is a length measuring device having a tape measure device structure in which a tape measure drawer knob is attached to the extending end of the tape measure.

[Example of idea]

Hereinafter, the structure of a length measuring instrument according to an embodiment of this invention will be explained with reference to the drawings. In the figure, 1 is a scale disc with an outer circumference of 20 cm fitted with a rubber ring 2; Along the outer periphery of the front surface, a length measurement scale is displayed as shown in Figure 3, and on the outer periphery of the back surface, there are two protruding scales located on the back surface corresponding to the "3.5cm position" of length measurement scale 3. Count actuation pins 4,4 are provided.

Reference numeral 6 denotes a measuring instrument main body in which the scale disk 1 is partially exposed downward and supported by a shaft 7 as shown in FIG.
The internal space surrounded by the intermediate board 6b and the front and back lids 6a is formed as a scale disk mounting part A, and the intermediate board 6b and the back lid 6c form a scale disk mounting part A. An enclosed internal space is formed as a tape measure storage part B. The scale disc 1 is pivoted so that its outer circumference is partially exposed through the lower opening 8 of the front lid 6a of the main body, and the zero point position of the length measurement scale 3 is set at the front surface of the front lid 6a of the main body. Align the measuring instrument body 6 with the start mark 10 aligned with the measurement starting point and the scale reading point 9a of the window hole 9.
When held in the hand and pushed forward, the scale disk 1 rolls along the surface to be measured, making it possible to measure the length of the part to be measured.

Reference numeral 11 denotes a snail-shaped oscillating body whose base end is pivoted by a pin 12 so as to be movable up and down at the front end of the main body 6 in the moving direction. It has a protruding lever part 13 extending to the outer periphery back surface position, and when the scale disc 1 is rotated by a length of 10 cm from the scale reading point 9a,
One count operation pin 4 is connected to the protruding lever portion 1.
By rotationally engaging with and disengaging from the tip inclined edge of No. 3, it is operated to swing up and down. The swing actuating body 11 is urged to rotate in the neck-down direction by the elasticity of the rubber string 14, and due to the rapid rotation due to the urging force of the rubber string 14, the neck portion 11a moves to the lower edge 15 of the neck opening of the main body. When it collides with the drum, it emits a counting sound.

Reference numeral 5 denotes an idling prevention device for the scale disc 1, which includes a ratchet wheel 16 provided on the back side of the scale disc 1 to prevent idling;
The plate spring 17 has a portion 17a that comes into elastic contact with the outer peripheral teeth of the ratchet wheel 16, and has a base end fixed to the intermediate board 6b.

Reference numeral 18 denotes a tape measure take-up reel which is rotatably supported by a shaft 18a in the tape measure storage part B of the measuring instrument main body 6, and this take-up reel 18 is urged in the tape measure winding direction by the elasticity of a mainspring 19. has been done. Reference numeral 20 denotes a tape measure of a predetermined length (for example, a length that allows measurement of about 50 cm) wound on the take-up reel 18. A tape measure drawer knob 22 is attached to the extending end of the tape measure. Note that the reference numeral 23 shown in FIG.
When the operation button 23a protruding from the opening is pushed, it rotates clockwise in FIG. 4 against the elasticity of the leaf spring 26, and the stopped state of the tape measure 20 is released. The tape measure 20 pulled out from the main body 6 is automatically wound up by the spring force of the mainspring 19 when the stop lever 23 is released.

In addition, in the above-mentioned embodiment, the case where the scale disk 1 has an outer circumference length of 20 cm has been described, but the scale disk 1 may have an outer circumference length of 10 cm, and in this case, the count operation pin 4 is It is considered to be 1 piece.

[Effect of idea]

Since the length measuring instrument of this invention is equipped with the scale disc 1 and the swinging body 11 as described above,
The number of revolutions corresponding to the 10 cm length of the scale disc can be counted by counting the number of times the oscillating actuator operates, and for this reason, conventional length measuring instruments incorporating a gear-type counting device can be used. In comparison, the structure can be simplified and costs can be reduced, and the oscillation of the oscillating body 11 can be made more interesting.

Moreover, the scale disk mounting portion A of the measuring instrument main body 6
A tape measure storage part B is provided on the back side of the main body, and a take-up reel 18 is pivotally supported in this tape measure storage part, and a tape measure 20 of a predetermined length wound on this take-up reel 18 is inserted outward from the main body entrance/exit hole 21. Since the tape measure drawer knob 22 is attached to the extending end of the tape measure, it can be used when checking whether the length of a straight line, etc. measured by rotating the scale disc 1 is accurate. Furthermore, the measuring device can be easily and accurately remeasured using the tape measure 20 incorporated in the measuring device main body 6, and the inconvenience of using another tape measure can be easily eliminated.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the length measuring device of this invention, Fig. 2 is a cross-sectional plan view, Fig. 3 is a vertical cross-sectional view of the portion where the scale disk and the swinging body are attached, and Fig. 4. is a vertical cross-sectional view of the tape measure storage portion. 1... Scale disk, 3... Length measurement scale, 4...
Count operation pin, 5... Graduation disc idling prevention device, 6... Measuring instrument body, A... Scale disc attachment part, B... Tape measure storage part, 9... Window hole, 9a... Scale reading Point, 10...Start mark, 11...
Swing operating body, 18... Take-up reel, 20... Tape measure, 21... Body entrance/exit hole, 22... Tape measure drawer knob.

Claims (1)

[Scope of utility model registration request] A scale disk whose outer circumference is set to 10 cm or an integral multiple thereof, has a length measurement scale along the front outer circumference, and has one count operation pin protruding from the back outer circumference for every 10 cm of outer circumference. and a measuring instrument body that is operated by holding the scale disc in a hand that is pivoted with a part of it exposed so that it can roll on the tangential surface along the part to be measured;
A 10 cm length that is oscillated by the abutting engagement of the count operation pin when the scale disk, whose base end is supported by a pin on the main body of the measuring device so as to be able to move up and down, is rotated by a distance of 10 cm from the starting point. A tape measure storage part is provided on the back side of the scale disc insertion part of the measuring instrument main body, and a take-up reel is pivotally supported in this tape measure storage part, and A length measuring instrument comprising a tape measure of a predetermined length wound on a take-up reel and extending outward from an inlet/outlet hole of the main body, and a tape measure drawer knob attached to the extending end of the tape measure.