JPH07128001A - Tape measure - Google Patents

Abstract

PURPOSE:To provide a tape measure where a handle attached to a rotator does not rotate by rotating a take-up drum freely when withdrawing the tape of the tape measure. CONSTITUTION:Engagement parts 6 and 7 consisting of gear-lock surfaces 61 and 71 and inclination surfaces 62 and 72 are formed opposingly at a rotator 2 and a take-up drum 4 and at the same time both engagement parts 6 and 7 are engaged elastically. When taking up a take-up tape 5, the gear-lock surfaces 61 and 71 are mutually engaged and the rotator 2 and the take-up drum 4 are rotated in one piece. When withdrawing the take-up tape 5, the inclination surfaces 62 and 72 are slid mutually to rotate the take-up drum 4 freely. thus preventing the rotation of the take-up drum 4 from being transferred to the rotator 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure having an idle mechanism.

Conventionally, in a tape measure in which a winding drum is rotated by a handle attached to the outside of a case to wind a long tape measure of 10 to 100 m, the rotary body and the winding drum are conventionally separated from each other. Therefore, the rotating body and the winding drum are always rotated integrally.

[0003]

However, in such a tape measure as described above, since the rotating body and the winding drum are always rotated integrally with each other, when the tape measure is pulled out, As the handle rotates with the rotation, the rotated handle may hit your hand.
In particular, when the tape measure tape was pulled out rapidly, the handle also rotated vigorously, which was extremely dangerous. Also, when the tape measure tape was pulled out rapidly with the handle folded down, the handle knob might violently collide with the case and even damage the case and knob. Furthermore, the position of the folded handle is inevitably determined in relation to the take-up drum, so when storing the tape measure in a cosmetic case, etc., the handle may be an obstacle depending on the position of the folded handle, making it difficult to store. There was also.

The present invention solves the above problems of the conventional tape measure, and provides a tape measure in which the winding drum is allowed to idle and the handle is prevented from rotating when the tape measure is pulled out. It is a thing.

[0005]

In order to achieve the above object, the present invention has the following constitution. That is, in the tape measure according to the present invention, the rotating body horizontally installed in the case is rotated by the handle attached to the outside of the case, and the tape measure is wound around the winding drum axially attached to the rotating body. In the tape measure made as described above, the meshing portions composed of the locking surface and the inclined surface are formed to face each other on the rotating body and the winding drum, and both meshing portions are elastically meshed,
When the tape measure is wound up, the locking surfaces are engaged with each other so that the rotating body and the take-up drum are rotated integrally, and when the tape measure is pulled out, the inclined surfaces slide against each other and the take-up drum moves freely. Characterized by being rolled.

[0006]

According to the tape measure of the present invention, the rotating body and the take-up drum are opposed to each other, and the meshing portions are formed. When the tape measure is wound, the engaging surfaces of the meshing portions mesh with each other and the rotating body and the winding body are wound. The drum and the drum are rotated together, and when the tape measure is pulled out, the inclined surfaces of the meshing parts slide against each other so that the take-up drum idles. The rotation of the drum is not transmitted to the rotating body, and therefore the handle does not rotate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a front view showing an embodiment of a tape measure according to the present invention, FIG. 2 is a longitudinal sectional view of a main part of the tape measure shown in FIG. 1, FIG. 3 is a perspective view showing an embodiment of a rotating body, and FIG. It is a perspective view showing one example of a taking drum.

In the drawings, reference numeral 1 denotes a case, which is formed by symmetric front cover 11 and back cover 12 made of synthetic resin, metal or the like, which are opposed to each other and are integrated by screwing or the like. The shape of the case 1 is not particularly limited. A handle 13 is formed on the upper portion of the case 1, and a tape port 14 is formed on the lower portion.

Reference numeral 2 denotes a rotating body, one end surface 21 of which is bulged from the front cover 11 of the case 1, and a handle 3 is attached to the bulged end surface 21. A support shaft 23 is erected at the center of the other inner end surface 22 of the rotating body 2, and the support shaft 23 is inserted into the through hole 15 of the case back 12 of the case 1. In this way, the rotary body 2 is rotatably laterally mounted between the front lid 11 and the back lid 12 in the approximate center of the case 1, and is rotated by the knob 31 pivotally attached to the tip of the handle 3. It is done like this.

Reference numeral 4 denotes a cylindrical take-up drum which is axially attached to the rotating body 2, and has a shaft hole 41 formed at the center thereof, and the shaft hole 41 is fitted and inserted into the support shaft 23 of the rotating body 2. Has been done. A tape measure tape 5 is wound around the outer periphery of the take-up drum 4, and the tape measure tape 5 can be freely taken in and out from the tape port 14 of the case 1. The tape measure 5 is a synthetic resin,
It is a normal strip-shaped body made of metal or the like and has a front surface and a back surface with graduation printing, and has a length of about 10 m to 100 m.

Wedge-shaped meshing portions 6 and 7 are respectively formed on the inner end surface 22 of the rotating body 2 and one end surface 42 of the winding drum 4 facing the inner end surface 22.
The two meshing portions 6, 7 are elastically meshed by the elastic pressing force of the repulsion spring 8. The two meshing portions 6, 7 have locking surfaces 61, 71 formed with one edge being substantially vertical, and a downward slope from the locking surfaces 61, 71 toward the other edge. It is composed of the formed inclined surfaces 62 and 72. The inclined surface 62 of the rotating body 2 and the inclined surface 72 of the winding drum 4 are downwardly inclined in opposite directions, and when the tape measure 5 is wound up, it is wound with the locking surface 61 of the rotating body 2 by an elastic pressing force. The locking surface 71 of the take-up drum 4 meshes with each other to rotate the rotating body 2 and the winding drum 4 integrally, and when the tape measure 5 is pulled out, the inclined surface 62 of the rotating body 2 and the inclination of the winding drum 4 The surface 72 slides to allow the winding drum 4 to rotate freely, so that the rotation of the winding drum 4 is not transmitted to the rotating body 2. The meshing portions 6 of the rotating body 2 and the meshing portions 7 of the take-up drum 4 are generally formed with the same number of 2 to 4 facing each other at equal intervals on the circumference of the support shaft 23. To be done.

Reference numeral 8 is a repulsion spring fitted into the support shaft 23 of the rotating body 2 so as to elastically mesh the engaging portion 6 of the rotating body 2 with the engaging portion 7 of the winding drum 4. The repulsion spring 8 is elastically supported between the support tool 91 and the end surface 43 of the winding drum 4 by a mounting tool 9 such as a screw attached to the tip of the support shaft 23, so that the winding drum 4 is rotated. Always elastically pressed toward. In addition, in order to elastically mesh both the meshing portions 6 and 7, the repulsion spring 8 is used in the above embodiment, but a plate-shaped spring may be used, or an elastic material such as rubber may be used.
Further, the back case 12 may be bent slightly inward so that its repulsive elastic force is utilized.

In the above embodiment, the meshing portion 6 of the rotating body 2 and the meshing portion 7 of the winding drum 4 are both formed in a convex shape. Alternatively, the other meshing portion may be formed in a concave shape.

[0014]

As described above in detail, in the tape measure of the present invention, the meshing portion is formed so as to face the rotating body and the winding drum, and the locking surface of the meshing portion is formed when the tape measure is wound. The rotating body and the take-up drum are integrally rotated by meshing with each other, and when the tape measure tape is pulled out, the inclined surfaces of the engaging portions slide with each other so that the take-up drum is idled. When the tape is pulled out, the rotation of the take-up drum is not transmitted to the rotating body and the handle does not rotate. Therefore, even if the tape measure is pulled out, there is no danger that the handle will hit the hand, and even if the tape measure is pulled out rapidly with the handle tilted, the case or knob will not be damaged, and the tape measure can be put on a cosmetic box or the like. When storing, the handle can be arbitrarily rotated in the reverse direction to a position where it does not get in the way, and storage is easy.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a tape measure according to the present invention.

FIG. 2 is a vertical sectional view of a main part of the tape measure shown in FIG.

FIG. 3 is a perspective view showing an embodiment of a rotating body.

FIG. 4 is a perspective view showing an example of a winding drum.

[Explanation of symbols]

 1 Case 2 Rotating Body 3 Handle 4 Winding Drum 5 Tape Measure Tape 6 Rotating Body Meshing Part 61 Rotating Body Locking Surface 62 Rotating Body Sloping Surface 7 Winding Drum Meshing Area 71 Winding Drum Locking Surface 72 Rolling Inclined surface of take-up drum 8 Repulsion spring

Claims (1)

[Claims] 1. A rotating body horizontally mounted in a case is rotated by a handle attached to the outside of the case, and a tape measure is wound around a winding drum axially attached to the rotating body. A tape measure made up of a tape measure and a rotary drum and a take-up drum, in which meshing portions each having a locking surface and an inclined surface are formed to face each other, and both meshing portions are elastically meshed. At this time, the locking surfaces are engaged with each other so that the rotating body and the winding drum are rotated integrally, and when the tape measure is pulled out, the inclined surfaces slide with respect to each other so that the winding drum is idled. Characteristic tape measure.