JP2004077415A - Tape measure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To add an appropriate braking force to a reel containing a case main body by preventing the entrance of water and dust from a gap formed between a braking button and the case main body. <P>SOLUTION: This tape measure comprises the reel for holding a measuring tape by winding and unwinding and winding up the measuring tape by clockwise and counterclockwise rotation; a spiral spring for automatically winding up the unwound measuring tape by rotating the reel; and the case main body containing the reel and the spiral spring. The case main body is provided with the braking button formed by double molding. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tape measure frequently used in the fields of civil engineering, construction, and the like, and aims to reliably prevent water and dust from entering a case of the tape measure.
[0002]
[Prior art]
The tape measure used for measuring dimensions at construction sites, etc., has a structure in which a measuring tape is wound around a reel and incorporated into the case body together with a spiral spring. The reel can be automatically rotated by force and wound into the case.
[0003]
A brake button separately provided on the case is used to hold the measure tape wound out of the case at a predetermined length or to suppress the winding speed in order to eliminate tape flapping when winding the measure tape. Is adjusted by pressing with an appropriate force. Japanese Patent No. 2989781 is referred to as a prior art document in this regard.
[0004]
By the way, in the tape measure of the conventional structure, there is a gap between the brake button and the case, so that water and dust inevitably enter from the gap, and the measure button cannot reliably brake the measure tape. There was also.
[0005]
In addition, the conventional tape measure has a combined structure in which the case body is divided into two parts. When combining the two, a step of attaching a brake button is indispensable before the step, and there is a limit in simplifying the manufacturing process. there were.
[0006]
[Problems to be solved by the invention]
An object of the present invention is to propose a new tape measure that prevents the intrusion of water, dust, and the like, effectively exerts the braking function inherent in the brake button, and reduces the number of parts and simplifies the manufacturing process. There.
[0007]
[Means for Solving the Problems]
According to the present invention, a measuring tape is wound around and held in a clockwise or counterclockwise direction, and the measuring tape is automatically wound and wound. A spiral spring that winds into the reel, and a tape measure that includes a case body that houses the reel together with the spiral spring,
A tape measure, wherein a brake button formed by double molding is provided on the case body.
[0008]
In the tape measure having the above configuration, the brake button is preferably made of a soft material.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0010]
FIGS. 1 (a) and 1 (b) show a side surface of a tape measure according to the present invention and a cross section taken along the line AA. In FIG. A case 2 having a structure is a reel rotatably held in the case 1 and a measure tape 3 is wound around the reel 2 and held.
[0011]
Reference numeral 4 denotes a spiral spring disposed inside the reel. One end of the spiral spring 4 is connected to the locking piece 1a of the case body 1, and the other end is connected to the inside of the reel 2. The reel 2 is rotated by the restoring force of the spring 4, and the measuring tape 3 involved in unwinding can be automatically wound into the case body 1.
[0012]
Reference numeral 5 denotes a brake button made of a soft material such as an elastomer. The brake button 5 is formed integrally with the case main body 1 by double molding such as insert molding, and when the brake button 5 is pressed, the rear surface thereof comes into contact with the side surface of the reel 2 to cause friction at that time. A braking force is applied to the reel 2 by resistance.
[0013]
In the tape measure having the above configuration, since the brake button 5 is formed integrally with the case body 1, there is no gap between them, so that intrusion of water or dust is prevented. In contrast, a braking force can be reliably applied.
[0014]
Further, since the brake button 5 is integrated with the case body 1, there is no need to install the brake button 5, and there is an advantage that the structure can be simplified by reducing the number of parts.
[0015]
The case body 1 can be made of a hard synthetic resin, but the brake button 5 is made of a soft synthetic resin such as a synthetic rubber or an elastomer so that an accurate speed adjustment can be performed by pressing the brake button.
[0016]
FIG. 2 is a diagram showing another embodiment of the tape measure according to the present invention.
By connecting the brake button 5 and the case body 1 with a concave 1b and a convex 5a as shown in FIG. 2, the brake button 5 can be firmly adhered to the case body 1.
[0017]
In forming the connecting portion as described above, a concave portion 1b that widens toward the bottom may be formed on the surface of the case body 1 when the case body 1 is formed, and the brake button 5 may be double-formed on that portion.
[0018]
The concave portion 1b formed in the case main body 1 may be in the shape of a todd or a groove, and is not limited in this respect.
[0019]
Also, in FIG. 2 described above, the concave portion 1b and the convex portion 5a have a trapezoidal cross section as an example, but a T-shaped or circular cross section as shown in FIGS. May be provided, and there is no particular limitation on this point.
[0020]
【The invention's effect】
According to the present invention, since the brake button is formed integrally with the case body, intrusion of water and dust is prevented, and a reliable braking force can be applied to the reel.
[0021]
Further, since the incorporation of the brake button is unnecessary, the assembling work is simple, and the structure can be simplified by reducing the number of parts.
[Brief description of the drawings]
FIGS. 1 (a) and 1 (b) are explanatory diagrams of the configuration of a tape measure according to the present invention.
FIG. 2 is a diagram showing another embodiment of the tape measure according to the present invention.
FIGS. 3A and 3B are views showing a connection state between a brake button and a case main body.
[Explanation of symbols]
1 Case body 2 Reel 3 Measure tape 4 Spiral spring 5 Brake button

Claims (2)

A reel that winds and holds the measure tape and rotates it clockwise and counterclockwise to wind and wind the measure tape, and a spiral spring that turns the reel and automatically winds the measure tape involved in unwinding And a case main body including the reel and a case body in which the spiral spring is provided,
A tape measure, wherein a brake button formed by double molding is provided on the case body. The tape measure according to claim 1, wherein the brake button is made of a soft material.

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