JPS5824163Y2 - tape measure case - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a tape measure tape (hereinafter simply referred to as a tape measure tape in this specification) that has an arcuate cross section and has the ability to maintain a straight line.

) related to a tape measure case that allows you to pull out all of the items.

In conventional tape measure cases, one end of the case is engaged with a drum with a built-in retraction spring to pull out and insert the tape, and it is impossible to take out the entire tape measure outside of the case. However, a type of tape measure case that allows you to pull out all the same tape measure tapes from the case is attracting attention.

Regarding the case of this kind of tape measure tape,
10849, but its construction and operation are rather complex, and its particular disadvantage is that it has only one guide shoe that moves within the case.

As a result of experimenting with such an article, the inventor found that a considerable amount of force was required to pull out and insert the measuring tape;
When we investigated the cause of this problem, we found that because the arcuate inner wall located on the entrance/exit side of the tape is fixed, when the tape measure tape is pulled out, the entire wound tape moves in the drawing direction. It was found that the contact friction with the outside of the measuring tape increases, and also when pushing the measuring tape into the case, the tape that is being wound tries to return to a straight line and spreads evenly over the contact surface of its outer periphery. However, in the above technical concept, only the guide shoe is movable, so it has been found that it does not greatly contribute to absorbing the contact resistance that occurs.

In particular, in the case of the same technical idea, when the tape measure tape is not inserted, the storage chamber is an ellipse with the long axis parallel to the line perpendicular to the tape insertion direction, so the tape measure tape is inserted from the entrance and exit and comes into contact with the guide shoe. When it is bent at a sharp angle, the hand is subjected to a considerable resistance force in the opposite direction at the beginning of insertion.

The present invention has been made in view of such drawbacks, and will be explained below with reference to the drawings shown as examples. 1 is a tape measure case, 2 is a tape measure case 1 provided at the lower end of the side wall. This is the entrance and exit for the measuring tape 3.

4 is the tip of the measuring tape 3. 5a. Reference numeral 5b denotes a movable frame formed with a semi-circular inner wall 6 and movable within the case 1 so as to be movable equally in the running direction of the measuring tape 3 in the entrance/exit 2, that is, in the entrance/exit direction, and the movable frames 5a, 5b
The inner walls 6 of the case 1 are arranged symmetrically to form a circular storage chamber 7, and an arbitrary number of springs 8 interposed between the outside of the movable frames 5a and 5b and the inner wall of the case 1 are used to form a circular storage chamber 7. There is direct oppression.

Among the movable frames 5a and 5b, the movable frame 5a disposed on the entrance/exit 2 side has a cutout at the lower end to communicate the storage chamber 7 and the entrance/exit 2, and the notch end surface is the upper edge of the entrance/exit 2. extends inside the case 1 parallel to the bottom surface 9 of the case 1,
The movable frame 5a is supported in contact with a seat plate 11 which together with the bottom surface 9 constitutes a guide path 10 following the entrance/exit 2.
, 5b, a protrusion 12 having a round-shaped cross section, for example, is formed in the direction of movement on the contact surface with the case 1 and the seat plate 11, and the case 1 and the seat plate 11 are provided with a groove that fits into the protrusion 12. 13 are formed.

The bottom surface 9 of the case 1 extends to the center of the bottom surface at the same level as the lower opening edge of the entrance/exit door 2, and a surface lower than that level is formed rearward from the center of the bottom surface. The upper end is in contact with the upper inner wall of the case 1 and is slidable.

Furthermore, the bottom surface 9 of the case 1 and the lower end 14 of the inner wall 6 of the movable frame 5b located on the opposite side from the entrance/exit 2 are the same as those of the movable frame 5a.
When and 5b are in contact with each other, they are in contact without a step, and
The bottom surface extends to the lower opening edge of the entrance/exit 2 in the tangential direction of the lower end 14.

Since the present invention is constructed as described above, when the tip 4 of the measuring tape 8 is inserted through the entrance 2 of the case 1, it enters the storage chamber 7 through the guide path 10 and gradually moves along the inner wall 6 of the movable frame 5b. The measuring tapes 3 are bent and raised, then reach the inner wall 6 of the movable frame 5a, and again reach the movable frame 5b, so that the tape measure tapes 3 are superimposed on each other, are inscribed in the storage chamber 7, and are wound up.

The inner diameter of the tape measure tape 3 in the storage chamber 7 is the same as that of the tape measure tape 3.
However, the outer diameter of the wound tape 3 increases because the movable frames 5a and 5b move in opposite directions while being pressed by the spring 8. As a result, the storage chamber 7 is enlarged to provide room for storing the measuring tape 3.

The tape measure tape 3 is pulled out in the reverse manner.

As described above, in the present invention, the tape measure tape 3 is wound up in the circular storage chamber 7 formed by the two movable frames having the semi-circular inner walls 6 which are pressed against each other by the springs 8. The entire outer periphery is in contact with the inner wall 6 of the movable frames 5a, 5b, and since the movable frames 5a, 5b including this inner wall 6 move together while being pressed, the tangent acting on any point of the contact surface of the measuring tape 3 The friction caused by the force in the direction causes the movable frame 5
The force required to take in and out the tape measure tape 3 is reduced by the movement of the tape measure tape 3, and the force required to put in and take out the tape measure tape 3 is reduced, resulting in a smooth tape measure tape 3.
The loading and unloading operations will be secured.

In particular, when the measuring tape 3 is pulled out, the entire wound tape 3 tends to move toward the entrance/exit 2 side.
In the present invention, the movable frame 5a as well as the movable frame 5b is movable in the direction in which the tape measure tape 3 enters and exits from the entrance 2.
The contact resistance with the inner wall 6 is significantly reduced.

Also, when the measuring tape 3 enters the storage chamber 7, the movable frame 5
The lower end 14 of the inner wall 6 of b and the case bottom 9 are in contact with each other without a step, and the bottom 9 extends in the tangential direction of the lower end 14 of the movable frame 5b, so that a large shock is applied when the measuring tape 3 is inserted. It is possible to perform a smooth insertion operation without any friction.

Furthermore, the movable frames 5 a , 5 b have protrusions 12 formed on their upper and lower surfaces, and grooves 13 corresponding to the protrusions 12 are provided inside the case 1 , so that the transition of the movable frames 5 a , 5 b is easy. In addition, the lower surface of the movable frame 5a is fitted and supported by the seat plate 11 extending parallel to the bottom surface 9 on the upper edge of the entrance/exit door 2, the protrusion 12, and the groove 13. will not occur.

Further, the level of the rear part of the bottom surface is further lowered, and the lower end of the movable frame 5b slides on this part, so the movable part 5b does not go to the left half of the case 1, and the movable part 5a, The shape of the storage chamber formed by the arc-shaped inner wall of 5b is a constant circle when the movable parts 5a and 5b are in contact with each other, and the winding is performed without changing the center when winding the tape measure tape. Insertion of the movable frame 5b is also carried out smoothly in combination with the seamless connection between the bottom surface 9 and the movable frame 5b.

As described above, in the present invention, all the surfaces in contact with the outer peripheral surface of the measuring tape being wound up are movable, so the insertion and withdrawal operation of the tape can be performed with extremely small force. In addition, there are other products that also produce the other effects mentioned above, so their practical value is enormous.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the tape measure case according to the present invention, and Fig. 2 is a sectional view of the tape measure case according to the present invention.
FIG. 1 is a sectional view taken along the line AA, and FIG. 3 is a sectional view taken along the line BB in FIG. 1... Case, 2... Doorway, 3...
...Tape, 4...Tip, 5a, 5b...
...Movable frame, 6...Inner wall, 7...
Storage chamber, 8...Spring, 9...Bottom, 10...Guideway, 11...Seat plate,
12...Protrusion, 13...Concave groove, 14.
...Lower end.

Claims (1)

[Scope of utility model registration request] A case with an entrance and exit for a tape measure at the lower end of the side wall,
It consists of two movable frames that are disposed facing each other so as to be movable toward and away from the case and have semicircular arc-shaped inner walls. A seat plate is formed on the upper edge of the entrance/exit of the tape measure tape and extends parallel to the bottom surface of the case.
The movable frame on the entrance/exit side is slidable between the upper inner wall of the case and the seat plate, while the bottom surface of the case from the center to the rear extends from the lower opening edge of the entrance/exit to the center. The movable frame on the opposite side of the entrance is slidable between the upper inner wall of the case and the rear part from the center of the bottom, which is at a lower level. A tape measure case characterized in that, when the frame is in contact with the lower end of the movable frame on the opposite side to the entrance/exit, the bottom surface connected to the lower opening edge of the bottom of the case is in contact with the lower end of the movable frame on the tangent line thereof without any step.