JP3045653U - Tape measure tape shock absorber - Google Patents

Abstract

(57) [Summary] (Modifications) [PROBLEMS] To efficiently absorb the impact at the time of collision of a locking hook, and to form the cushioning member with a single member. The present invention provides a tape-measure tape-measure member having a tape measure capable of easily and easily mounting the cushion member. A cushioning member (3) having an eave (35a / 35b) having a projection (33) provided on a top part (31) and being prevented from moving in a specific direction, between an upper jaw (7) and a lower jaw (8) provided with a groove (71) of a tape entrance (6). The projection 33 of the top part 31 and the groove 71 of the upper jaw 7 are provided in an engaged state. Thus, when the locking hook 5 collides with the hook collision portion 36 of the cushioning member 3, the cushioning member 3 is supported by the projection 33 of the top portion 31 of the cushioning member 3 fitted in the groove 71 provided in the upper jaw 7. Attempts to rotate, whereby the eaves 35a / 35b flex and deform, restraining rotation and absorbing shock.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a tape measure provided with a biasing means for biasing a tape in a winding direction, and more particularly to a shock generated when a locking hook attached to a tape tip collides with a tape entrance when the tape is wound. The present invention relates to a shock absorbing device that softens and prevents breakage of a locking hook.

[0002]

[Prior art and problems]

 Many of today's tape measures are mainly tape measures with a built-in biasing means that constantly biases the tape in the winding direction. Energy is stored in the biasing means. When storing the pulled-out tape, the tape is automatically inserted into the case by releasing the hand holding the tape, or by releasing the brake mechanism and using the rewinding energy of the urging means. It is a tape measure that can be caught.

[0003] Further, a locking hook is attached to the tape, and the locking hook is used to fix the tape by hooking it on the end of a member to be measured at the time of measurement, or when the tape is wound. Used as a stopper to prevent the tape from being pulled into the case. When the tape is wound, the locking hook collides with the lower jaw of the tape entrance and exit of the case at a considerable speed. For this reason, a buffer member is provided at the tape entrance to prevent the locking hook from being damaged, thereby exerting considerable power in preventing the locking hook from being damaged.

Since the structure of the cushioning member must efficiently absorb the collision energy of the locking hook, a conventional resilient member (spring / rubber) for absorbing the impact and a resin or the like combined with the same are used. In many cases, the structure is composed of members, so that several steps must be required to complete the cushioning member. For this reason, there is a problem that the unit price of the tape measure equipped with the shock-absorbing member is considerably higher than that of the tape measure not equipped with the shock-absorbing member, both in the manufacturing process and in the number of parts. there were.

There is also a tape measure equipped with a shock-absorbing member formed of a single member. However, this is because the shock-absorbing direction of the shock-absorbing member is linear, and When the stop hook collides with the shock absorbing member, the shock absorbing portion of the shock absorbing member retreats backward to receive the shock, but since the shock absorption direction is linear, the shock is sufficiently absorbed. It was not possible, and the shock absorber retracted further and collided with the lower jaw (tape case) of the tape entrance to receive the impact. At this time, since the impact acts on the lower jaw linearly, a considerable impact is applied to the case material of the lower jaw, and the lower jaw member becomes fatigued earlier than the useful life of the tape measure and the tape measure is used. There is also a problem that can not be done.

[0006]

【Purpose】

 SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and makes it possible to easily and easily attach the cushioning member in the manufacturing process, reduce the unit cost of the parts, and pull back the locking hook. It is an object of the present invention to provide a tape buffer member of a tape measure that can efficiently absorb the impact at the time of collision.

[0007]

[Means to solve the problem]

 The gist of the present invention is that, in a tape measure equipped with an urging means for urging the tape in the winding direction, the lower jaw of the tape entrance and exit of the case is retracted rearward from the upper jaw, and the inside of the entrance and exit is located inside the entrance. A cushioning member is provided, and the cushioning member has a frame having a tape through hole at the center, and a ridge is formed on an upper portion thereof. The ridge fits into a groove provided laterally in the upper jaw of the tape entrance. On the other hand, a contact portion that contacts the upper surface of the lower jaw at the tape entrance is formed below the tape through-hole frame, and the lower portion of the frame is held at a distance from the front edge of the lower jaw. Is a tape buffer member of a tape measure.

[0008] The tape measure is described in more detail. The tape measure case is provided with a measuring tape take-up spring inside the case, the spring is wound around a shaft in the case, and the measuring tape is attached to an end thereof. In addition, the winding energy is accumulated in the spring by pulling out the measuring tape. The lower jaw of the tape entrance is relatively receded to the depth side of the case from the upper jaw, and a buffer member is attached to this part in a somewhat inscribed state.

The cushioning member has a frame having a tape through hole in the center, and a ridge formed on an upper portion of the frame surrounding the through hole, and the ridge is provided behind the upper jaw of the tape entrance. It fits into the groove provided on the inner wall of the case. Horizontal installation means the width direction of the tape. The ridge includes the upper edge of the frame. In addition, the ridge and the groove may be formed in a shape that can easily withstand the impact due to the collision of the locking hook and that can be easily formed. The mounting positions of the ridges and grooves may be reversed. Desirably, the ridge is vertically long and the groove is deep.

The cushioning member may have a form in which the frame of the through hole has no cut or a form in which a part of the frame has a cut. Should be selected in consideration of the above. Then, to improve the efficiency of shock absorption, an eave is formed above the cushioning member so as to protrude in the tape retraction direction. It is preferable to form a pair of projections on the inner wall and to sandwich the end between them. However, the eaves may be shortened and the top surface may be in contact with the upper jaw behind the groove.

Further, the movement may not be prevented by the projection but may be prevented by another method. The protruding length and width of the eaves may be selected in consideration of the impact absorption efficiency, and are not particularly limited. Further, the eaves may not be provided at one place behind the frame of the through hole, but may be provided in parallel behind the cushioning member below the eaves in the same protruding direction.

At this time, the manner of regulating the movement of the end of the eave is the same as that of the upper eave. However, its end is positioned below the lower protrusion of the pair of protrusions. Also, in this eave, similarly to the upper eave, the protruding length and width are not particularly limited, and may be set to a suitable size in consideration of the shock absorption efficiency. For bettering, the movement may be prevented by a rib or the like with a part of the eaves in the upper jaw direction.

[0013] A contact portion that contacts the upper surface of the lower jaw of the tape entrance or the inner upper surface of the bottom surface of the case is formed below and behind the frame of the tape through hole. It does not fall out of the tape entrance of the room. It is desirable to form a hook collision portion on the front surface below the frame of the cushioning member with which the locking hook collides. Although the shape of the hook collision portion is not particularly limited, the width is slightly smaller than the width of the tape entrance, and the vertical direction extends further below the bottom of the cushioning member, and is substantially flush with the bottom of the tape measure case. It is better to do so. The thickness is not particularly limited as long as it can sufficiently withstand an impact.

A desired space is provided between the hook collision portion or the lower portion of the frame and the front edge of the lower jaw, and the space is preferably set in consideration of the moving distance and the absorption efficiency at the time of shock absorption. Be separated. It is desirable to use a material such as resin for the material used for the cushioning member in view of molding, impact resistance, and production, but the material is not limited to this material and may be formed using a suitable material. Further, the eaves and the hook collision portion may be integrally formed using the same material as the cushioning member body.

[0015]

[Action]

 Since the tape shock absorber of the present invention has the above-described structure, in the manufacturing process, a biasing means equipped with a winding spring is attached to a case half having a shaft, and the end of the winding spring is exposed. The cushioning member is inserted, the protrusion formed on the cushioning member is fitted into the groove of the case half, and the contact portion below the cushioning member is brought into contact with the upper surface of the lower jaw of the case. Since the jaw of the case is retracted from the upper jaw, the contact portion below the cushion member is held away from the cushion member of the case or the hook collision portion formed on the front surface thereof from the front edge of the lower jaw.

[0016] With this, the mounting of the cushioning member to the case is completed, and thereafter, the tape is connected, the case half is covered and fixed, and then the tape is released. On the other hand, in use, when the tape is rewound and the locking hook collides with the buffer member, the locking hook is received by the hook collision portion or the frame, and the received collision energy is absorbed by the buffer member. You. In the absorption, when the locking hook collides with the collision portion of the cushioning member, the cushioning member tries to rotate in the tape pull-in direction with the ridge of the cushioning member fitted in the groove provided in the upper jaw as a fulcrum.

The rotation is suppressed by the eaves provided behind the cushioning member, which is prevented from moving in a direction substantially perpendicular to the tape surface, by bending the eaves. Due to the bending deformation of the second eave provided below and the backward movement, the rotation is further suppressed and the collision energy is absorbed.

Even without the eaves, the cushioning member is sandwiched between the groove and the lower jaw, and when the tape is rewound and the locking hook collides with the cushioning member, the shock of the protrusion is reduced by the bending of the ridge. After the collision and the end of the collision, the cushioning member returns by the restoring force of the material of the ridge.

[0019]

【Example】

 FIG. 1 is a partial side view of a tape measure according to the present invention. FIG. 1 is a tape measure having a winding spring (not shown) therein. 2 is a case of the tape measure 1, 3 is a cushioning member for absorbing the collision energy of the retaining tape 5 of the unwound tape 4, 4 is a tape connected to the winding spring, and 5 is a tip of the tape 4. It is a hook attached by the beau 51.

Reference numeral 6 denotes a tape entrance through which the tape 4 enters and exits. Reference numeral 7 denotes an upper jaw provided with a groove 71, and reference numeral 8 denotes a lower jaw. The end of the upper jaw retreats slightly backward from the upper jaw 7. 81 is an upper surface of the lower jaw 8 and 82 is a front edge of the lower jaw 8. The contact portion 32 of the frame 37 of the cushioning member 3 is held in contact with the upper surface 81 of the lower jaw 8, and a ridge 33 constituting the upper part of the frame 37 having the through hole 34 is provided on the upper jaw 7. It is engaged with the groove 71.

An eave 35a for absorbing collision energy protruding in the tape retracting direction is provided behind the frame 37, and an end of the eave 35a has an end substantially perpendicular to the tape retracting direction. The movement in the direction is prevented by the upper jaw 7 and the projections 22 formed on the inner wall 21 of the case 2. Further, an eave 35b having the same protruding direction as that of the eave 35a is provided below the eave 35a, so that the absorption of collision energy can be enhanced. Its end is located below the lower protrusion 22.

Reference numeral 34 denotes a through hole through which the tape 4 passes, and reference numeral 36 denotes a hook collision portion formed on the front surface thereof and against which the locking hook 5 of the rewound tape 4 collides. A space is provided between the hook collision portion 34 or the lower portion of the frame 37 and the front edge 82 of the lower jaw 8. Then, when the tape 4 is rewound and the locking hook 5 collides with the buffer member 3, the locking hook 5 is received by the hook collision portion 36, and the received collision energy is absorbed by the buffer member 3.

When the locking hook 5 collides with the hook colliding portion 36 of the cushioning member 3, the cushioning member 3 is attached to the top portion 31 of the cushioning member 3 fitted in the groove 71 provided in the upper jaw 7. An attempt is made to rotate in the tape pull-in direction with the ridge 33 as a fulcrum. The rotation is buffered by the eaves 35a provided behind the frame 37, which is prevented from moving in a direction substantially perpendicular to the surface of the tape 4, by bending the eaves 35a. The second eave 35b provided below the second eave 35b is deformed and moved rearward, whereby the rotation is further suppressed and the collision energy is absorbed. FIG. 2 is a front view of a tape measure showing the cushioning member set in the half case, and FIG. 3 is an exploded perspective view showing the tape entrance and the setting state of the cushioning member.

[0024]

【effect】

 Since the tape cushioning member of the present invention has the above-described structure, in the manufacturing process, the spring unit wound around the case half having the shaft is mounted, and the exposed end is inserted through the center through hole. By inserting the ridge formed on the frame into the groove of the case half and fitting the lower part of the frame into contact with the lower jaw of the case, the hook collision part moves away from the front edge of the lower jaw. Since it is held and the mounting of the cushioning member to the case is completed, the assembling work is extremely easy, and the cost is low because the parts are one-piece.

Further, even if the locking hook pulled back during use collides vigorously with the cushioning member, each part of the cushioning member efficiently absorbs the collision energy, thereby giving fatigue to the lower jaw member. It is possible to reliably absorb the collision energy over a long period of time. This prevents the tape measure from becoming unusable due to fatigue (cracks, etc.) of the cushioning member or the lower jaw member of the case before the useful life of the tape measure elapses.

As described above, since the cost for equipping the cushioning member can be reduced, the manufacturing cost of the tape measure equipped with the cushioning member can be reduced. Also, when a cushioning member is newly provided on a tape measure that has not been provided, it can be easily provided.

[Brief description of the drawings]

FIG. 1 is a partial side view of a tape measure according to the present invention.

FIG. 2 is a front view of a tape measure showing a cushion member set in a half case.

FIG. 3 is an exploded perspective view showing a set state of a tape entrance and a buffer member.

[Explanation of symbols]

1-tape measure, 2-case, 21-inner wall, 22-projection, 23
Bottom, 3-buffer, 31-top, 32-bottom, 33
-Protrusion, 34- through hole, 35a / 35b- eaves, 36-
Hook collision part, 37-frame, 4-tape, 5-locking hook, 51-byou, 6-tape entrance, 7-upper jaw, 71
-Groove, 8-lower jaw

[Procedure amendment]

[Submission date] August 21, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims for utility model registration

[Correction method] Change

[Correction contents]

[Utility model registration claims]

Claims (3)

[Utility model registration claims] In a tape measure provided with an urging means for urging a tape in a winding direction, a lower jaw of a tape entrance of a case is retreated backward from an upper jaw, and a cushioning member is provided in the entrance. The cushioning member has a frame having a tape through hole in the center, and a ridge formed on an upper portion thereof fits into a groove provided in the upper jaw of the tape entrance and the lower portion of the frame. A contact portion that contacts the upper surface of the lower jaw of the tape entrance, and the lower part of the frame is held at a distance from the front edge of the lower jaw, and the tape buffer device is a tape measure. 2. An eaves protrudes rearward of the cushioning member in a depth direction of the case, and its end is sandwiched between a pair of protrusions formed on an inner wall of the case. 1. Tape measure of tape measure 3. An eave having the same protruding direction is similarly formed below the eave, and an end of the eave is disposed below a lower one of a pair of protrusions formed on the inner wall of the case. 2. The tape measure of claim 1, wherein