JP3917876B2 - Shock absorber for tape measure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tape measure capable of winding and storing a tape in a case, and more particularly, to a tape buffering device for buffering the collision energy of a tape leading end locking piece locked to a tape entrance at the end of winding of the tape. is there.
[0002]
[Prior art and problems]
Today, many of the tape measures are widely used as an automatic winding type that automatically winds a measuring tape, which winds the tape and winds the tape around the winding drum. For example, the rotating drum is provided with a coil spring and a case for storing the rotating drum.
Normally, the tape is stored in the case, so when measuring, pull the locking piece provided at the tip of the tape that locks into the tape inlet / outlet of the case with your finger, and then use the tape pulled out as appropriate. The desired measurement is performed.
[0003]
When the measurement is completed and the tape is accommodated in the case, the tape is stopped by a tape braking device or a coil spring built in the rotating drum in the case by releasing the braking of the tape stopped by the hand. The tape is automatically wound up in the case, and the tape is completely wound when the locking piece at the tip of the tape is locked at the tape inlet / outlet.
At this time, since the locking piece collides with the tape entrance / exit at a considerable speed, the tape entrance / exit is often provided with an impact buffering device for relaxing and absorbing the collision energy of the locking piece.
[0004]
Various types of shock absorbers have been developed depending on the winding speed of the tape, the width of the tape, the storage length of the tape, and the like.
However, in the conventional shock absorbing device, if the collision energy is more reliably mitigated, the device main body becomes a complicated shape, the device becomes larger as a whole, and it takes time to attach to the case. There were drawbacks and it was a problem economically and in production. In many cases, the shock absorbing device is formed in a unique form depending on the strength of the collision energy.
[0005]
【the purpose】
The present invention has been made in view of the above-described problems, and can reduce the collision energy of the locking piece with a simple structure. Further, the addition of the second buffer member also reduces the stronger collision energy. An object of the present invention is to provide a shock absorber with a tape measure that can be used.
[0006]
[Means for solving problems]
The gist of the present invention is an impact buffering device that is provided at the tape entrance / exit of the case and reduces the collision energy of the tape front end locking piece that is engaged with the tape entrance / exit when the winding of the tape is completed, The shock absorbing device is composed of a receiving member whose upper part is bent in the same direction as the tape bending direction, and a substantially U-shaped buffering member located behind the receiving member. A shock absorbing device for a tape measure characterized in that a free end or its vicinity is connected to an appropriate part of a receiving member.
[0007]
The shock absorber of the tape measure according to the present invention will be described in detail. The case is a member that accommodates a measuring tape and is also the main body of the tape measure.
The case is made of a material such as resin or metal that is appropriately formed in a desired shape, and a shaft is erected on the inner wall of the case, and a measuring tape with memory printed on the shaft is surrounded by the case. A rotating drum wound around is supported on the shaft.
Further, a coiled winding spring for winding the tape is provided inside the rotating drum, and the tape is biased in the winding direction.
[0008]
The tape enters and exits from the tape entrance / exit provided under the front wall of the case, and when the winding of the tape is finished, the locking piece at the tip of the tape is engaged with the tape entrance / exit. The tape is prevented from being pulled into the case.
Since the locking piece collides with the tape inlet / outlet at a considerable speed, an impact buffering device for relaxing the collision energy of the locking piece is provided at the tape inlet / outlet.
[0009]
The shock absorbing device includes a receiving member to which a locking piece at the tip of the tape is locked, and a substantially U-shaped buffering member located at the rear of the receiving member for alleviating shock caused by a collision. And both free ends of the buffer member or the vicinity thereof are connected to appropriate portions of the receiving member.
The material of the receiving member and the buffer member is not particularly limited, and may be formed using a suitable material. Preferably, an appropriate resin material is used so that the receiving member and the buffer member can be integrally molded. It is good to form from.
[0010]
The receiving member is preferably formed by bending the upper part of the member in the same direction as the tape bending direction and substantially the same curved shape, so that the gap between the lower surface of the tape and the upper surface of the receiving member is constant, The entry of foreign objects can be reduced.
Moreover, the said curve refers to both the shape substantially the same as the curvature of a circumference, or the shape close | similar to a substantially V shape.
The thickness of the receiving member in the tape insertion / removal direction, that is, the thickness of the member is not particularly limited, and a suitable size may be appropriately selected in consideration of the strength of the collision energy, the size of the locking piece, and the like.
[0011]
Further, the buffer member has a substantially U-shape in which a bridge portion serving as an impact buffer portion for reducing (absorbing) an impact is connected to one end of each of two leg portions that are appropriately separated from each other. Is good. The distance between the leg portions may be appropriately separated so that the bridge portion can be bent and the collision energy can be relaxed. Specifically, the distance between the leg portions is preferably approximately the same as the lateral width of the receiving member. Moreover, you may make it the substantially U-shaped form where the part connected to a bridge part from a leg part is curving.
Further, the buffer member, that is, the vicinity of the center portion of the bridge portion may be wider than the other portions. In other words, it is to widen in the tape advance and retreat direction. The widened portion may be tapered so that it can be smoothly connected to other bridge portions. A plurality of the wide portions may be formed.
[0012]
The buffer member is positioned behind the receiving member with the free end of its respective leg connected to the appropriate part of the receiving member.
In connecting the leg portion to the receiving member, the leg portion may be connected to the back portion of the receiving member, that is, the rear surface portion of the receiving member, or may be connected to the side surface portion or the bottom surface portion of the receiving member.
The shape of the leg portion or the bridge portion is not particularly limited, and may be linearly or substantially linearly formed in a plan view or a side view, or may be appropriately curved in a predetermined direction. Furthermore, a wavy shape or the like may be used.
The dimensions, such as the length and thickness of the buffer member, that is, the leg portion and the bridge portion, are not particularly limited, and may be appropriate to withstand impact force and to be suitable for cushioning.
[0013]
Further, the second buffer member may be connected to the rear of the above-described buffer member, that is, the bridge portion supported by the two legs, and the second buffer member is provided with at least two free ends, The respective free ends are preferably located apart in the tape bending direction. Further, it is preferable that at least the shock buffering portion of the second buffer member can be positioned at a predetermined distance from the front buffer member. That is, it is sufficient that the impact buffering portion of the second buffer member has an interval (dimension) that does not hit the bridge portion of the buffer member when the second buffer member is appropriately bent for shock relaxation (impact absorption).
[0014]
The shape of the second buffer member is not particularly limited, but as a specific example, it is preferable that the second buffer member has a substantially I shape, and the longitudinal direction thereof is the same as the tape bending direction. .
Further, the connecting portion between the above-described buffer member and the second buffer member is not particularly limited, but preferably, a suitable member is interposed at a substantially central portion of each member (buffer member / second buffer member). Or it is good to connect directly.
[0015]
Moreover, it is good to make the shape of a 2nd buffer member into a substantially U shape, and to connect the opening (between each free end) toward back. Or it is good to make the shape of a 2nd buffer member into a substantially V shape, and to connect the opening (between each free end) toward back.
The connecting portion between the above-described buffer member and the second buffer member is not particularly limited, but preferably, a suitable member is interposed at a substantially central portion of each member (buffer member / second buffer member). Or it is good to connect directly.
[0016]
The dimensions such as the width of the second buffer member described above are not particularly limited, and may be a dimension that can appropriately withstand an impact force and is suitable for cushioning.
Furthermore, a protrusion extending rearward may be formed at or near the free end of the second buffer member. The protrusion length, thickness, etc. of the protrusions are not particularly limited, and may be any one that can appropriately withstand an impact force and is suitable for impact relaxation.
The abbreviation of substantially U-shape / I-shape / substantially U-shape / substantially V-shape means that each of the C / I / U / V shapes is short in the horizontal direction, the vertical direction, etc. It shows the state of becoming longer. That is, it means those character-shaped deformation bodies.
[0017]
When the shock absorber is set in the case, in order to buffer the collision energy efficiently, the substantially U-shaped buffer member consisting of only the leg portion and the bridge portion has the substantially central portion of the bridge portion as the case. It should be locked.
Further, in the case where the second buffer member is provided behind the bridge portion, the free end of the second buffer member or the vicinity thereof may be locked to the case.
Furthermore, if the protrusion that extends rearward is formed at or near the free end of the second buffer member, the tip of the protrusion may be locked to the case.
Thus, in locking the predetermined portion of the first buffer member / second buffer member and the case, the portion locked by the buffering operation of the buffer members appropriately changes.
[0018]
[Action]
Since the shock absorber of the tape measure of the present invention is configured as described above, the buffer member behind the receiving member is composed of only a substantially U-shaped buffer member, and the substantially central portion of the buffer member is the case. When the tape is wound into the case and the locking piece at the tip of the tape collides with an impact buffer provided at the tape inlet / outlet, the receiving member is wound around the tape. Retreating in the take-off direction, the buffer member is also retracted accordingly. In addition, the buffer member bends backward on both sides with a central portion that is engaged with an appropriate portion of the case as a fulcrum. Thereby, the collision energy is relaxed (absorbed).
[0019]
Further, the buffer member behind the receiving member is formed of a substantially U-shaped buffer member, and the second buffer member is connected to the rear of the substantially central portion of the buffer member, and both free ends of the second buffer member are connected to each other. Here, what is locked to the case will be described with the buffer member behind the receiving member as the first buffer member. When the tape is wound into the case and the locking piece at the tip of the tape collides with an impact buffer provided at the tape inlet / outlet, the receiving member moves backward in the tape winding direction due to the collision. The first buffer member and the second buffer member also move backward. The second buffer member is bent at the inner portion thereof with both free ends locked to appropriate portions of the case as fulcrums, and the first buffer member is supported at the central portion connected to the second buffer member. Then, both side parts bend backwards. Thereby, the collision energy is relaxed (absorbed).
[0020]
【Example】
The impact shock absorber of the tape measure of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the impact shock absorber according to the present invention. A receiving member 21 for receiving the bending portion 21 is a curved portion facing the lower surface of the tape.
Reference numeral 3 denotes a U-shaped first buffer member, 31 denotes a leg portion connected to the receiving member 2, and 32 denotes a bridge portion serving as a portion for relaxing (absorbing) collision energy.
The shock absorbing device is set with the substantially central portion of the bridge portion 32 being locked to an appropriate portion of the case 61.
FIG. 2 is a plan view of the shock absorbing device of FIG. FIG. 3 is a perspective view of the shock absorbing device having a wide bridge center.
[0021]
FIG. 4 is a perspective view of an impact buffering device provided with a second buffering member. 1 is an impact buffering device, 2 is a receiving member for receiving a locking piece 66 at the tip of the tape 63, and 21 is a tape. It is a curved part which opposes the lower surface of this.
Reference numeral 3 denotes a U-shaped first buffer member, 31 denotes a leg portion connected to the receiving member 2, and 32 denotes a bridge portion serving as a portion for relaxing (absorbing) collision energy.
Reference numeral 4 denotes a connecting member that connects the bridge portion 32 of the first buffer member 3 and the second buffer member 5. Of course, when the shock absorbing device 1 is formed by integral molding, the connecting member 4 becomes an apparent part.
Reference numeral 5 denotes a second cushioning member formed in a substantially I-shape, and 51 denotes a protruding portion that protrudes rearward and is formed at both ends.
The shock absorbing device is set with both protrusions 51 locked to appropriate portions of the case 61.
FIG. 5 is a plan view of the shock absorbing device of FIG.
[0022]
FIG. 6 / FIG. 7 is a perspective view of an impact buffering device provided with another type of second buffer member, and FIG. 6 is a diagram in which the second buffer member 5 is substantially U-shaped. FIG. 7 shows the second buffer member 5 having a substantially V shape.
[0023]
FIG. 8 is a side view of the shock absorbing device attached to the case, where 6 is a tape measure, 61 is a case of the tape measure 6, 62 is a rotating drum supported by a shaft 65 standing in the case 61, 63 Is a tape wound around the rotary drum 62, and 64 is a take-up spring accommodated in the rotary drum 62 for winding the drawn-out tape 63. Reference numeral 67 denotes a tape inlet / outlet through which the tape 63 enters and exits, and 66 denotes a locking piece provided at the tip of the tape 63. Reference numeral 1 denotes an impact shock absorber attached to the tape doorway 67.
[0024]
FIG. 9 is a plan view of the shock absorbing device attached to the case. (A) is the impact buffering device of FIG. 1, 1 is an impact buffering device, 2 is a receiving member for receiving the locking piece 66 at the tip of the tape 63, and 3 is a U-shaped first buffering device. 31 is a leg part connected with the receiving member 2, and 32 is a bridge part which becomes a site | part which relieves (absorbs) collision energy. Reference numeral 68 denotes a locking portion of the bridge portion 32 with the case 61.
FIG. 4B shows the shock absorbing device of FIG. 4, 1 is the shock absorbing device, 2 is a receiving member for receiving the locking piece 66 at the tip of the tape 63, and 3 is a U-shaped first buffer. 31 is a leg portion connected to the receiving member 2, 32 is a bridge portion that is a part that relaxes (absorbs) collision energy, 4 is a connecting member, and 5 is a second formed in a substantially I-shape. Reference numeral 51 denotes a buffer member, which is a protruding portion that is formed at both ends and protrudes backward. Reference numeral 69 denotes a locking portion between the rear end portion of the protrusion 51 and the case 61.
[0025]
FIG. 10 is a plan view illustrating a buffering operation state of the shock absorbing device. (A) is the impact buffering device of FIG. 1, and when the locking piece 66 at the tip of the tape 63 collides with the receiving member 2 of the impact buffering device 1 provided at the tape doorway 67, the receiving member is caused by the collision. 2 retracts in the winding direction of the tape 63, and the first buffer member 3 also retracts accordingly. And the bridge | bridging part 32 of the 1st buffer member 3 bends back on both sides using the latching | locking part 68 with the case 61 as a fulcrum. Thereby, the collision energy is relaxed (absorbed).
FIG. 4B shows the shock absorbing device of FIG. 4. When the locking piece 66 at the tip of the tape 63 collides with the shock absorbing device 1 provided at the tape inlet / outlet 67, the receiving member 2 of the tape 63 is caused by the collision. The first buffer member 3 and the second buffer member 5 are also retracted along with the retracting in the winding direction. The second buffer member 5 has its inner portion bent backward with a locking portion 69 with the case 61 as a fulcrum, and the bridge portion 32 of the first buffer member 3 is connected to the second buffer member 5. With the (connecting member 4) as a fulcrum, both side portions bend backward. Thereby, the collision energy is relaxed (absorbed).
[0026]
【effect】
As described above, the shock absorber of the tape measure according to the present invention relieves the collision energy by bending deformation of the member (buffer member), so the structure thereof is very simple, and the collision energy is also sufficiently reduced (absorbed). )can do.
Furthermore, the adjustment of the collision energy and the buffering force of the buffer member can be easily adjusted by changing the thickness of the buffer member.
[0027]
And the impact buffer device comprised from a receiving member and a 1st buffer member can be used for the tape measure with a weak collision energy, and is comprised from a receiving member, a 1st buffer member, and a 2nd buffer member. The shock absorbing device can be used for a tape measure with high collision energy. Therefore, even when used for a tape measure with different levels of impact energy, it is possible to share the basic structure of the shock absorber without economically constructing the shock absorber exclusively for the tape measure, as in the past. Moreover, it is excellent also in manufacture.
[Brief description of the drawings]
FIG. 1 is a perspective view of an impact buffering device according to the present invention. FIG. 2 is a plan view of the impact buffering device of FIG. 1. FIG. 3 is a perspective view of an impact buffering device having a wide bridge center. FIG. 5 is a plan view of the shock absorbing device of FIG. 4. FIG. 6 is a perspective view of the shock absorbing device provided with another type of second shock absorbing member. ] Perspective view of shock absorber provided with second buffer member of other form [FIG. 8] Side view of shock absorber attached to case [FIG. 9] Plan view of shock absorber attached to case FIG. 10 is a plan view showing the shock absorbing state of the shock absorbing device.
DESCRIPTION OF SYMBOLS 1- Shock absorber, 2-Reception member, 21- Bending part, 3-First buffer member, 31- Leg part, 32- Bridge part, 33- Wide part, 4- Connection member, 5- Second buffer member 51-protrusions, 6-measure, 61-case, 62-rotating drum, 63-tape, 64-winding spring, 65-shaft, 66-locking piece, 67-tape inlet / outlet, 68-locking portion, 69-Locking part

Claims (8)

An impact shock absorber provided at a tape inlet / outlet of a case to reduce the collision energy of a tape tip locking piece locked to the tape inlet / outlet at the end of winding of the tape. The receiving member is bent in the same direction as the bending direction, and a substantially U-shaped buffering member located behind the receiving member, and both free ends of the buffering member or the vicinity thereof are receiving members. A second buffer member having at least two free ends is connected to the rear of the buffer member, and the respective free ends are positioned apart from each other in the tape bending direction. Shock absorber for tape measure . The shock absorbing device for a tape measure according to claim 1 , wherein the vicinity of the central portion of the buffer member is wide . Shock absorbing device according to tape measure of claim 1, wherein the cushioning member is shaped substantially U. 2. The impact buffering device for a tape measure according to claim 1, wherein the second buffer member has a substantially I-shape and is connected such that the longitudinal direction thereof is the same as the bending direction of the tape . The impact buffering device for a tape measure according to claim 1, wherein the second buffer member has a substantially U-shape and is connected with its opening directed rearward . The impact buffering device for a tape measure according to claim 1, wherein the second buffer member has a substantially V-shape and is connected with its opening facing rearward . The shock absorbing device for a tape measure according to claim 1, wherein the buffer member and the second buffer member are connected to each other through a suitable member or directly at a substantially central portion of each member . The impact buffering device for a tape measure according to claim 1, wherein a protrusion extending rearward is formed at or near the free end of the second buffering member .

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