JP3505173B1 - Tape measure - Google Patents

Abstract

An object of the present invention is to provide a tape measure that has a hook portion that can be easily fixed to a portion to be used as a reference for length measurement and that can reduce an impact when the measure tape is rewound. SOLUTION: A tape measure 1 is such that a measuring tape 3 housed in a case 2 is pulled out or rewound through a payout opening 8 provided in the case 2. The magnet 10 was attached to the hook 9 at the tip of the measuring tape 3 so as to be exposed on the front and back surfaces. In addition, a cushion is provided in the payout opening 8 of the measuring tape 3 to alleviate the impact at the time of rewinding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape measure in which a measure tape housed in a case is pulled out or rewound through a feeding port provided in the case.

[0002]

2. Description of the Related Art A tape measure having an L-shaped hook portion at the tip of a measure tape feeds out the measure tape from a case, and a surface of the hook portion at a portion (planar portion) to be a reference for length measurement. Measure by pressing or hooking the back side. If the hook part is fixed to the reference part by magnetic force, etc., it is convenient that even one person can perform accurate measurement, especially when measuring a long distance.

As one of the tape measures devised for such a purpose, there is a tape measure described in Patent Document 1 below. Figure 7
As shown in FIG. 2, the tape measure 1'in the document has an L-shaped hook portion (hooking claw) 9'provided at the tip of the measure tape 3'encased in the case 2 ', and its surface (front side). , Ie, the magnet 10 'on the surface farthest from the case)
Is attached so that it can flip up. When measuring the length, the hook portion 9'is pressed against a reference portion with the magnet 10 'attached to the surface of the hook portion 9' (that is, lowered as shown). If the reference portion is a magnetic body, the magnet 10 'is attached to that portion, so that the hook portion 9'is fixed and the length measurement work is facilitated.

[Patent Document 1] Utility model registration No. 3006886

[0004]

In the tape measure of Patent Document 1 described above, when it is desired to hook the back surface of the hook portion to the reference portion to measure the length, it is difficult to obtain a sufficient coupling force by the magnet. Since the hook portion is interposed between the magnet and the reference portion, the force of the magnet is not transmitted sufficiently to the back surface thereof. Therefore, it is often difficult to fix the hook portion to the reference portion.

If the hook portion vigorously hits the case when the measure tape is quickly rewound, the impact may damage or drop the magnet. When the magnet is attached to the hook portion, the inertial mass of the hook portion is increased accordingly, so that the impact at the time of hitting the case also becomes large, and inconveniences such as damage and dropout easily occur.

In view of the above points, the invention according to the claims has a tape measure provided with a hook portion which can be easily fixed to a portion used as a reference for length measurement, and further a tape measure capable of relieving the impact when the measure tape is rewound. The purpose is to provide.

[0007]

The tape measure described in claim 1 is a tape measure in which a measure tape in a case is put in and taken out through a feeding port, and a hook portion at the tip of the measure tape (generally from the longitudinal direction of the measure tape). In the part that becomes a locking claw that is bent at a right angle) ・A magnet that is thicker than the hook is attached・While the hook penetrates between the front and back sides,
Not protruding to the surface (the back surface near the case)
And, it is characterized in that it is attached so as to be exposed on the surface of the hook portion (the tip of the measure tape, that is, the front surface far from the case) and the back surface .

This tape measure has magnets exposed on both sides of the hook.
Since it is out, the part that serves as the standard for measuring
Surface) and press the front side of the hook part to the same part
In both cases of hooking the back side of the hook part,
Fully exert the force of the magnet and hook it to the reference part.
The part can be fixed. Therefore, measuring with a tape measure
Work becomes easier. Also, the above magnet is attached so that the hook portion penetrates between the front and back sides .
In, compared to so apply a different magnet to each of front and back sides of the hook portion, the one magnet can be exposed on both sides of the hook portion, it requires less number of magnets, the manufacturing cost Can be lowered. Moreover, such
Check that the magnet does not project to the back side of the hook.
When the measure tape is rewound, the magnet
You can avoid hitting hard. Therefore, damage to the magnet
And falling off is effectively prevented. The magnet is the hook
To prevent it from protruding to the back,
The end surface closer to the slot is in the same surface as the back surface of the hook,
Or forward of the back of the hook (away from the case
Side).

Further, as in the tape measure described in claim 2, it is preferable that the magnet is attached by being press-fitted into a hole provided in the hook portion. Press fit the magnet,
Inner dimension (such as inner diameter) than its outer dimension (such as outer diameter)
It means pressing into a smaller hole (hence the hole with a tightening margin) with pressure. Since the attachment of the magnet by press fitting does not require attachment parts (bolts, nuts, etc.) or adhesives, the manufacturing cost can be further reduced.

The tape measure according to claim 3 further relaxes the impact of the measure tape feeding opening at the time of rewinding (that is, when the measure tape is pulled into the case and the hook portion hits the feeding opening). It is characterized in that a cushion for doing is provided. The cushion may have any structure, but for example, a member that is easily elastically deformed may be provided at a position where the hook portion abuts on the feeding port. With this tape measure, even when the drawn measure tape is quickly rewound by the action of a spring or the like in the case, the cushion reduces the impact when the hook portion hits the feeding port. Therefore, the magnet, the hook portion, and further (near the feeding port of the case) are less likely to be damaged, and the magnet is effectively prevented from falling off the hook portion.

[0011]

As in the tape measure according to the fourth aspect, the hook portion may be formed with a tubular portion, and the magnet may be fitted inside the tubular portion. The tubular portion is a cylindrical or square tubular portion having a central axis line at right angles to the surface (front surface or back surface) of the hook portion, and reference numeral 19 in FIG. 6 is an example thereof. When the magnet is fitted inside the tubular part, the contact area between the hook and the magnet becomes large, so the magnet is strongly restrained and protected by the hook, and the drop and damage are particularly effective. Can be prevented. For example, if the magnet is attached so that it does not protrude from the end of the tubular part as shown in Fig. 6, when the hook part is pressed or hooked to the reference part, or when the measure tape is rewound into the case, etc. The magnet does not easily receive external force. That point is most advantageous in preventing the magnet from falling off or being damaged.

A tape measure according to a fifth aspect is characterized in that the hook portion is attached to a measure tape so as to be movable back and forth by a thickness including a magnet. In the tape measure configured as described above, the front surface of the hook portion when the length is measured by pressing the measure tape and the back surface of the hook portion when the length is measured by hooking the tape on the reference position (0 mm point) of the measure tape. It is possible to match. Therefore, accurate length measurement can be performed by using either the front surface or the back surface of the hook portion.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION One mode for carrying out the invention is shown in FIGS. 1 and 2 are a side view and a front view of the tape measure 1. 3 is a sectional view taken along line III-III in FIG.
4 and 5 show IV-IV and V- in FIG. 1, respectively.
It is a sectional view of V.

The tape measure 1 shown in FIGS. 1 and 2 has a measure tape 3 wound in a case 2. The case 2 is made of synthetic resin and is covered with a rubber cover 4 on the outside for the purpose of making it easy to hold and protecting the case 2. A metal clip 5 is fixed to the central surface of the case 2 and the cover 4 with a screw 6 for sandwiching and fixing the belt between pants and the like. The measure tape 3 is made of thin carbon steel (SK material) with a thickness of about 0.2 mm, and has a width of about 20 mm,
It has a length of about 5 m and is housed in the case 2 by being wound around a reel (not shown) containing a coil spring (not shown).

The stop knob 7 provided on the side surface of the case 2 is for fixing the measure tape 3 pulled out against the coil spring at an arbitrary position (drawing length), and is slid downward in the drawing. As a result, the tape 3 can be fixed. When the stop knob 7 is slid upward, the measure tape 3 is released and is rewound into the case 2 by the action of the coil spring. The measure tape 3 is pulled out and rewound through a feeding port 8 provided at the bottom of the case 2.

In such a tape measure 1, as shown in FIG. 3, an L-shaped portion (a portion along the longitudinal direction of the tape and a portion perpendicular to it) is formed at the tip of the measure tape 3 (the end portion on the side where the tape goes out of the case 2). The hook portion 9 which is formed by integrating the portion with the L shape) is attached. When measuring the length,
The surface of the hook portion 9 (the surface facing outward from the case 2) is pressed against a portion serving as a reference for length measurement, or the back surface of the hook portion 9 (the surface facing the case 2 side) is hooked.

As shown in FIGS. 2 and 3, the hook portion 9
Two magnets 10 are attached to the. Hereinafter, the hook portion 9 and parts related thereto will be described.

The hook portion 9 is made of a steel plate (S
S41). In this hook portion 9 having an L-shape, two circular holes are formed through the bent portion bent at a right angle from the length direction of the measure tape 3, and each hole has a diameter of about 5 mm and a length of about 5 mm. A 2 mm cylindrical ferrite (N35) magnet 10 is inserted and fixed. The hole of the hook portion 9 and the magnet 10 are fitted to each other by a so-called interference fit with no clearance and a tight margin, and the magnet 10 is press-fitted into the hole using a press machine.

Since a through hole is provided between the front surface and the back surface of the hook portion 9 and the magnet 10 is fitted therein,
The end surface of the magnet 10 is exposed on the front surface and the back surface of the hook portion 9. When the magnet 10 is exposed in this way, the magnetic flux density (about 2000 gauss) possessed by the magnet 10 is effectively exhibited on both sides, and a strong magnetic force is exerted on the magnetic body on the other side. However, as will be described later, the magnet 10 is attached so that its end surface does not project from the back surface of the hook portion 9 in order to reduce the impact received when the measure tape 3 is unwound.

The hook portion 9 is connected to the measure tape 3 as follows. As shown in FIG. 4, two elongated holes 13 are formed in the connecting portion 9a of the hook portion 9 that faces the length direction of the measure tape 3, and the measure tape 3 and the reinforcing member 15 on the lower surface thereof (see FIG. Insert the rivet 14 fixed in (5). As a result, the hook portion 9 is connected to the measure tape 3 and the reinforcing member 15.

The elongated hole 13 formed in the hook portion 9 has a major axis oriented in the longitudinal direction of the measure tape 3, and its dimension (major axis) is the thickness from the surface of the magnet 10 to the rear surface of the hook portion 9. Only larger than the diameter of the rivet 14. Therefore, when the hook portion 9 is pushed from the front (front surface side), the surface of the magnet 10 coincides with the zero point (reference point, 0 mm point) of the measure tape 3, and when the hook portion 9 is pulled forward, Hook part 9 by the thickness including 10
Slides and the back of the hook 9 is the measuring tape 3
Matches the zero point of.

When the hook portion 9 is pressed against H-shaped steel or the like, the measure tape 3 is pulled out and measured while fixing the hook portion 9 to the H-shaped steel at the surface of the magnet 10. When hooking the back surface of the hook portion 9 on H-shaped steel or the like, the hook portion 9 is fixed to the H-shaped steel by the back surface of the magnet 10. Since the hook portion 9 slides properly as described above, the error does not increase even though the hook portion 9 having a large thickness is used because of the magnet 10, and the length can be accurately measured with the same scale. In addition, the magnet 1 is provided on the front surface and the back surface of the hook portion 9.
Since 0 is exposed, the magnetic force of the magnet 10 can be fully utilized to facilitate length measurement work.

A cushion 12 is arranged inside the feeding port 8 in order to absorb the impact caused by the hook portion 9 hitting the feeding port 8 of the case 2 when the measure tape 3 is rewound. The cushion 12 is made of a synthetic resin having high elasticity and is formed in an annular shape close to a quadrangle while providing U-shaped bent portions 17 on both sides as shown in FIG. The front portion (the side close to the tip of the measure tape 3) is extended to the front of the feeding port 8, and the rear portion is positioned by a stopper 18 formed integrally with the case 2. The measure tape 3 is rapidly rewound and the hook portion 9 is fed out.
When the back surface hits the front portion of the cushion 12, the impact is absorbed by the deformation of the cushion 12 (particularly the bent portion 17). In addition to the impact absorbing action of the hook portion 9, since the magnet 10 does not project on the back surface of the hook portion 9 (the impact force is not concentrated on the magnet 10), the magnet 10 is damaged. It is effectively prevented from falling off.

FIG. 6 is a partial sectional view showing another embodiment for attaching the magnet 10 to the hook portion 9.
An example in which the tubular portion 19 is integrally formed with the hook portion 9 and the magnet 10 is press-fitted into the tubular portion 19 is shown. To form the tubular portion 19 on the hook portion 9, for example, an overhang process and a hole process are performed by a press machine. It is preferable to perform both processes at the same time (that is, with one stroke of the punch) because the manufacturing efficiency is improved.

As shown in FIG. 6, since the peripheral surface of the magnet 10 is protected and constrained by the tubular portion 19, the magnet 10 is
Can be prevented from being damaged or falling off. If the positions of both end surfaces of the magnet 10 are aligned with the ends of the tubular portion 19, the magnet 10
It is extremely advantageous in terms of both the protection of magnetic field and the exertion of magnetic force.

When the tubular portion 19 is provided as shown in FIG. 6, a screw is formed on the inner surface of the tubular portion 19 and a screw is also formed on the peripheral surface of the magnet 10, and the magnet 10 is attached to the hook portion 9 by screw connection. It is also possible to fix it. Also,
If the tubular portion 19 is formed on the back side of the hook portion 9,
It is also possible to provide the tubular portion 19 so as to project there. In addition, in order to obtain a strong magnetic force while using the small magnet 10, a rare earth cobalt-based permanent magnet may be used as the magnet 10.

[0028]

According to the tape measure described in claim 1, the magnetic force is strong on both the front surface and the back surface of the hook portion, which facilitates the length measurement work. Further, in addition to reduce the manufacturing cost can be used both sides of the one magnet, magnetic
The stones can be effectively prevented from being damaged or falling off. With the tape measure according to the second aspect , the magnet can be attached at low cost.

According to the tape measure described in claim 3 , it is possible to prevent the magnet from being damaged or falling off due to an impact when the measure tape is rewound. With the tape measure according to the fourth aspect , it is possible to more effectively prevent damage and dropout of the magnet.

In the tape measure according to the fifth aspect, since the hook portion moves, accurate length measurement can be performed using either surface of the hook portion.

[Brief description of drawings]

FIG. 1 is a side view of a tape measure 1 which is one mode for carrying out the invention.

FIG. 2 is a front view of the tape measure 1, which is II-II in FIG.
FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2, showing an enlarged view of the periphery of a delivery port 8.

FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 1, showing a state in which the measure tape 3 is pulled out from the feeding port 8 as seen from above.

5 is a bottom view of the state of FIG. 4, taken along line V-V in FIG.
FIG.

FIG. 6 is a partial cross-sectional view showing another embodiment regarding attachment of the magnet 10.

FIG. 7 is a side view schematically showing an entire conventional tape measure 1 ′.

[Explanation of symbols]

1 tape measure 2 cases 3 major tape 8 Feeding mouth 9 Hook part 10 magnets 12 cushion 13 slots 14 rivets 17 Bend

Claims (5)

(57) [Claims] 1. A measure tape contained in a case,
It is a tape measure that is pulled out or rewound through the feeding port provided in the case, and a magnet thicker than the hook is hooked at the hook at the tip of the measure tape.
Projection on the back of the hook while penetrating the hook between the front and back
A tape measure, which is attached so as to be exposed on the front surface and the back surface of the hook portion in a state where it is not attached. 2. The tape measure according to claim 1, wherein the magnet is press-fitted and attached to a hole provided in the hook portion. 3. The feeding port of the above-mentioned measure tape,
The tape measure according to claim 1 or 2, further comprising a cushion for cushioning an impact at the time of rewinding. 4. The tape measure according to claim 1 , wherein a cylindrical portion is formed on the hook portion, and a magnet is fitted inside the tubular portion. 5. The tape measure according to claim 1, wherein the hook portion is attached to a measure tape so as to be movable back and forth by a thickness including a magnet.