JPH062105U - Tape measure outer case - Google Patents

Abstract

(57) [Summary] [Purpose] The objective is to obtain a tape measure outer case that allows the rule to be uniformly wound around the winding shaft even when the drawn rule is suddenly pulled into the case. . [Arrangement] An arc-shaped guide wall is provided inside the case along the outer periphery of a rule winding drum mounted inside the case with a space that does not hinder the rotation of the winding drum.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an outer case of a tape measure.

[0002]

[Prior art]

 As shown in FIG. 2, the rule winding drum of the conventional tape measure is composed of a winding drum 2 having a rule winding shaft 1 and a side surface 3 integrally fitted to the winding drum 2.

The winding drum is loosely fitted to a shaft 6 provided in the center of the inner wall surface of one of the outer cases 4 and 5 of the tape measure so as to freely rotate, and one end is fixed to the shaft 6. Then, the spring 7 is wound, the other end 8 of the spring 7 is fixed to the rule winding shaft 1 of the winding drum, and the elastic force of the spring 7 rotates the winding drum. The rule winding shaft 1 is used as a member for fixing the end of the rule 9 and winding the rule 9, and pulling the rule 9 drawn out from the cases 4 and 5 into the cases 4 and 5. A hook 10 is attached to the tip of the rule 9.

In the conventional tape measure having such a structure, when the drawn rule 9 is suddenly drawn into the cases 4 and 5, the rule 9 is evenly arranged on the winding shaft 1 as shown in FIG. It is not closely wound in a spiral shape, but is irregularly wound in a triangular rice ball shape. As a result, the winding drum 2 does not rotate smoothly when the rule is pulled out next time, and the irregularly wound rule 9 is smoothly pulled out. Instead, a gentle feeling was transmitted to the hand, causing discomfort.

[0005]

[Problems to be solved by the device]

 An object of the present invention is to obtain an outer case of a tape measure capable of uniformly winding the rule on the winding shaft even when the drawn rule is suddenly drawn into the case.

[0006]

[Means for Solving the Problems]

 An arcuate guide wall was provided inside the case along the outer circumference of the rule winding drum mounted inside the case, with a space that did not hinder the rotation of the winding drum.

[0007]

[Action]

 When the rule that was pulled out is suddenly drawn into the case, the rule prevents the rule from expanding beyond the diameter of the winding drum due to the presence of the guide wall, and the rule is wound tightly in a spiral shape on the winding shaft. To be done.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

The rule take-up drum of the tape measure of the present invention shown in FIG. 1 has a take-up drum 12 having a rule take-up shaft 11, and a side surface (removed in the figure) which is integrally fitted to the take-up drum 12. It has been configured) and.

The take-up drum is freely loosely fitted to a shaft 16 provided at the center of the inner wall surface of one outer case 14 of the tape measure, one end of which is fixed to the shaft 16 and a spring 17 is wound around it. The other end 18 of the winding drum is fixed to the rule winding shaft 11 of the winding drum so that the winding drum is rotated by the elastic force of the spring 17, and the rule winding shaft 11 of the rule winding drum has a rule. It is used as a member for fixing the end portion of 19 and drawing it into the winding case 14. 20 is a hook attached to the tip of the rule 19. And the structure of the above-mentioned tape measure is not different from the conventional tape measure.

In the present invention, however, an arcuate shape is formed inside the case 14 along the outer circumference of the winding drum 12 which is rotated by the elastic force of the spring 17 and which does not hinder the rotation of the winding drum 12. A guide wall 21 is provided. By providing the guide wall 21, when the rule 19 that has been pulled out is suddenly pulled into the case, the rule 19 is wound by the presence of the guide wall 21. It is possible to prevent the diameter of the take-up drum 21 from becoming larger than the diameter of the take-up drum 21, and it is possible to closely wind the rule take-up shaft 11 in a uniform spiral shape.

Although the guide wall 21 has been described as being provided inside the case 14, even if it is provided in the other case (not shown), it is provided in both cases and a predetermined guide is provided when both cases are engaged. Of course, the wall 21 may be formed.

[0013]

[Effect of device]

 As described in detail above, the outer case of the tape measure of the present invention is circular along the outer circumference of the rule winding drum mounted inside the case, with a space that does not hinder the rotation of the winding drum. Since the arc-shaped guide wall is provided inside the case, when the rule that was pulled out is suddenly drawn into the case, the rule is larger than the diameter of the winding drum body due to the existence of the guide wall. It is prevented from spreading greatly, and is closely wound in a spiral shape evenly on the rule winding shaft, without irregular winding as in the past. We were able to completely eliminate the phenomenon that a rugged feeling was transmitted to the hand, causing discomfort.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a tape measure embodying the present invention.

FIG. 2 is an exploded view of a conventional tape measure.

FIG. 3 is a vertical sectional view of a conventional tape measure.

[Explanation of symbols]

 1,11 Rule winding shaft 2,12 Winding drum 4,5,14 Exterior case 6,16 Shaft 7,17 Spring 9,19 Rule 21 Guide wall

Claims (1)

[Scope of utility model registration request] 1. An arc-shaped guide wall is provided inside the case along the outer periphery of a rule winding drum mounted inside the case, with a spacing that does not hinder the rotation of the winding drum. An outer case of a tape measure that is characterized by that.