JP2006046988A - Tape measure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape measure capable of putting in and putting out the measurement tape automatically without needing external power. <P>SOLUTION: The tape measure comprises: the tape reel 1 supported by the shaft 1a for winding the measurement tape 1e biased in a direction toward putting out; the coil spring 2e provided in the tape reel 1 for transmitting the rotation and biasing the measurement tape 1e in a direction of putting in the tape 1e; and the rotary drum 2 supported by the shaft 2a. For the tape reel 1 the pinion 1b and the gear wheel 1c, and for the rotary drum 2 the pinion 2b and gear wheel 2c are provided. Regarding the pinion and gear wheel, the gear wheel 1c of the tape reel 1 and the pinion 2b of the rotary drum 2 are engaged as the 1st engagement, and the pinion 1b of the tape reel 1 and the gear wheel 2c of the rotary drum 2 are engaged as the 2nd engagement. By selecting the 1st engagement or the 2nd engagement, the recovery force of the measurement tape 1e of the tape reel 1 and the biasing force of the coil spring 2e to the rotary drum 2 are reversed in priority, thereby the measurement tape 1e wounded on the tape reel 1 can be put out or put in. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a tape measure, and in particular, relates to a tape measure capable of feeding and retracting a measuring tape without using an electric motor.

Conventionally, a tape measure has been provided with a rotating drum with a coil spring wound around the measuring tape and energizing the measuring tape in the winding direction. When measuring, the measuring tape is wound around the rotating drum. The measuring tape is pulled out by a human hand for an arbitrary length, and stopped at the position pulled out by a brake for measurement.
When the measurement is finished and the brake is released, the drawn measurement tape is automatically wound around the rotating drum by the biasing force of the coil spring.

Thus, when a relatively short dimension is measured several times in succession by this tape measure, the following measurement operation is repeated many times.
In this operation, a person pulls out the measuring tape, for example, by about 1 meter from the case by hand, stops the measuring tape pulled out by operating the brake, and starts dimension measurement. Then, the brake is released at the end of the measurement, and the measuring tape is pulled into the case. This operation is repeated many times.

  At this time, since the measuring tape pulled out from the case is stopped at the position pulled out by the brake in order to facilitate the dimension measurement, the brake operation with the finger is performed twice in one measuring operation. This braking operation applies a force that stops the pulled-out measuring tape at that position against the winding urging force, so a certain amount of force is required for the operation, so the burden on the finger is considerable. Become.

And, there are many measuring places where the above operation is performed, and in order to prevent damage to the measuring tape, the measuring tape must be once stored in the case and moved, and it is put on the finger for the brake operation. In addition to the burden, it was very troublesome to put in and take out the measuring tape.
Accordingly, the present invention has been made in view of the above-described problems, and an object thereof is to provide a tape measure that can automatically feed and retract a measuring tape without requiring external power. is there.

  The gist of the present invention is that a measuring tape formed by an arbitrary member that can return to a substantially linear shape is rotatably supported, and the measuring tape of the tape reel is biased in the winding direction. A rotating drum that is rotatably supported and has a biasing means for rotating the tape reel and the rotating drum so that the rotation can be transmitted by an arbitrary rotation transmitting means. A rotation transmission form in which the rotation biasing force of the measuring drum wound around the tape reel is changed over the biasing force of the biasing means of the rotating drum and the biasing force of the biasing means of the rotating drum is the tape. By selecting any one of the rotation transmission modes that surpass the feeding biasing force of the measuring tape wound around the reel by any selection means, the tape reel Feed or take-up of the measuring tape are wound is tape measure which comprises carrying out.

The tape measure of the present invention will be described in detail. A measuring tape on which an arbitrary scale for dimension measurement is displayed is wound around the tape reel, and the measuring tape (an arbitrary linear tape that is urged in the feeding direction can be restored. The measuring tape member formed by the above member is fixed at an arbitrary portion of the tape reel at the inner end. And the winding direction of a measuring tape is wound so that it may feed out in the direction opposite to the urging | biasing direction of the urging | biasing means of a rotating drum. The tape reel may be supported rotatably.
The measurement tape refers to a member that displays at least a scale for measurement and can return (return) substantially linearly from the wound shape, and is formed so that this return can be performed. Any member can be used. Also, the cross-sectional shape of the measuring tape is not particularly limited, and it may be flat or curved, or substantially V-shaped. Furthermore, the material for forming the measuring tape is not particularly limited, and a tape material for tape measure (such as any hardened steel) that is commonly used may be used.

You may comprise a measuring tape so that it can enter / exit from the entrance / exit of the measuring tape formed in the arbitrary parts of the case similarly to a normal tape measure. In that case, the measuring tape is guided to its doorway. The structure is not particularly limited. For example, a guide may be arranged and the measurement tape may be guided to the entrance / exit by the guide.
The measuring tape may be positioned at the entrance of the measuring tape of the case so that the locking piece attached to the tip can be pulled out from the outside of the case, but all of it including the locking piece is accommodated in the case. May be.
The feeding length of the measuring tape may be set to a desired length with an appropriate restraining member such as a stopper.
The tape reel may be supported so that the tape reel can rotate about the center of the rotation surface. For example, a shaft support may be used.

The rotating drum includes an urging means and is rotatably supported. The urging means may be housed in a housing portion arranged side by side so as to be able to transmit rotation to the rotating drum, or a housing portion may be formed inside the main body of the rotating drum and placed in the housing portion.
The biasing means is for obtaining a force to rotate the rotating drum in one direction, and may be formed of any member as long as this force can be obtained. The rotating direction of the rotating drum is a direction in which a measuring tape wound around a tape reel provided to be able to transmit rotation to the rotating drum is always wound.
The rotatable support of the rotating drum only needs to be supported so that the rotating drum can rotate about the center of the rotating surface. For example, a shaft support may be used.

As a specific example of the aforementioned urging means, a spring member is suitable, and the spring member is not particularly limited, but a coil spring formed of an arbitrary material is desirable. A spring spring or the like may be used. And what is necessary is just to select and use the product (member) used as desired return force.
In the case of using a spring member, one end may be attached to a member such as a shaft on which the rotating drum is supported, and the other end may be attached to any part of the rotating drum. The attachment may be performed as long as the spring member does not come off the attachment portion, and may be hooked or fixed.

  The tape reel and the rotating drum are provided so as to be able to transmit rotation by an arbitrary rotation transmitting means. Specifically, the rotation may be transmitted by mainly forming a rotation transmission mechanism using gears. Alternatively, the rotation may be transmitted by mainly constituting a rotation transmission mechanism using a belt or a shaft. The belt is not particularly limited, and a round belt, a timing belt, or the like may be used.

  Further, the rotation transmission includes a rotation transmission form in which the feeding urging force of the measuring tape wound around the tape reel by changing the rotation ratio exceeds the urging force of the urging means of the rotating drum, and the urging means of the rotating drum. The rotation transmission form is superior to the feeding biasing force of the measuring tape wound around the tape reel. The rotation ratio may be changed by an arbitrary method or structure. For example, the rotation transmission means between the tape reel and the rotating drum may be structured so that the rotation ratio can be changed. Specifically, it may be performed by a combination of large and small gears.

  Further, the rotation ratio is not changed by the rotation transmission means, but the rotation transmission means simply transmits the rotation, and the rotation ratio may be changed by an arbitrary rotation ratio change means provided separately. The rotation ratio changing hand may be provided directly or indirectly on the tape reel and / or the rotating drum, or may be provided between the rotation transmitting means and the tape reel and / or between the rotation transmitting means and the rotating drum. Good.

When the rotation ratio is changed by a combination of large and small gears, the tape reel and the rotating drum body are formed by arranging two gears of a large diameter and a small diameter with an arbitrary number of teeth perpendicular to the rotation direction. That's fine.
The combinations of the gears that transmit the rotation include a first meshing of the large-diameter gear of the tape reel and the small-diameter gear of the rotating drum, the small-diameter gear of the tape reel, and the large-diameter gear of the rotating drum, So that the second engagement is achieved. The first engagement maintains the state where the measurement tape is wound, and the second engagement is a state where the measurement tape is fed out.

A specific method for forming the above-described gear may be to form a tooth portion of the gear with a convex cross section and form teeth around the convex large diameter portion and the small diameter portion. Alternatively, the large-diameter gear and the small-diameter gear may be formed separately and fixed in parallel by an arbitrary method around the rotation axis.
The large-diameter gear and the small-diameter gear are the first engagement between the large-diameter gear of the tape reel and the small-diameter gear of the rotary drum, or the small-diameter gear of the tape reel and the large-diameter gear of the rotary drum. As long as the positional relationship allows the second engagement, the gap may be provided with an arbitrary gap.

The number of teeth of the gear formed on the tape reel and the rotating drum is determined in consideration of the feeding operation from the winding part of the measuring tape or the winding operation to the winding part by the first or second meshing described above. It only has to be selected. That is, the gear ratio may be set according to the one using the advance / retreat mechanism.
The gears formed on the tape reel and the rotating drum may form two gears having a large diameter and a small diameter as described above, but the gears have different diameters depending on the operation mode (stepwise operation) of the advance / retreat operation. Any number may be formed.

  The first engagement between the large-diameter gear of the tape reel and the small-diameter gear of the rotating drum, or the second engagement between the small-diameter gear of the tape reel and the large-diameter gear of the rotating drum is any method or mechanism. The method and mechanism are not particularly limited. Specifically, the tape reel or the rotating drum may be moved in the axial direction on the shaft on which the gear is supported.

  The on-axis movement of the tape reel or rotary drum can be achieved by, for example, projecting the heads of buttons directly or indirectly connected to both sides of the tape reel or rotary drum from the case, respectively, The tape reel or the rotating drum may be moved by pushing the part. Of course, it is not limited to this method, and a known technique may be used.

Further, in order not to move the winding part of the measuring tape of the tape reel, only the large-diameter and small-diameter gears formed on the tape reel may be moved. In this case, the tape reel is composed of a gear portion that meshes with the gear of the rotating drum, and a rotating drum portion around which the measuring tape is wound, and the gear portion and the rotating drum portion are rotatably supported coaxially. By allowing the gear portion to move in the axial direction so as to be able to transmit rotation to the rotating drum portion, the rotating drum portion can be prevented from synchronizing with the movement of the gear portion.
The rotating body must be held rotatably so that it can be rotated in the same position by any method. Any method may be used so that the gear portion can transmit the rotation to the rotating body portion, and a known structure may be used.

Alternatively, the rotary drum is composed of a gear portion that meshes with the gear of the tape reel, and a rotation accommodating portion that accommodates the urging means, and the gear portion and the rotation accommodating portion rotate on the same axis as in the tape reel described above. The rotation receiving portion may be not synchronized with the movement of the gear portion by freely supporting the shaft and allowing the gear portion to move in the axial direction so as to transmit rotation to the rotation receiving portion.
The rotating housing must be held rotatably so that it can be rotated at the same position by any method. Any method may be used so that the gear portion can transmit the rotation to the rotation accommodating portion, and a known structure may be used.

  Therefore, since the tape measure of the present invention is configured as described above, if the urging force of the rotating drum is in the first meshing state of the gear ratio (rotation ratio) at which the urging force of the rotating tape is stronger than the restoring force of the measuring tape of the tape reel. The rotating drum is always applied with a rotational force in one direction by the urging means, and therefore the tape reel is always rotated in one direction. That is, the measurement tape wound around an arbitrary part of the tape reel is always held at the winding part.

  Then, if the second gear is in a gear ratio where the restoring force of the measuring tape on the tape reel is stronger than the urging force of the rotating drum, the linear restoring force of the measuring tape wound around an arbitrary part of the tape reel ( The tape reel is always rotated in one direction by the measuring tape due to the feeding force), and therefore the measuring tape is fed in one direction substantially linearly from its winding part while rotating the tape reel and the rotating drum. . That is, it is fed out of the case from the entrance and exit of the measuring tape. The feeding is performed until the straight return force (feeding force) of the measuring tape and the urging force of the rotating drum are balanced in the state of the second engagement. Thus, the feeding length is determined by the arrangement position of the arbitrary restraining member.

Then, by returning to the first meshing state in which the biasing force of the rotating drum is stronger than the linear restoring force (feeding force) of the measuring tape of the tape reel, the tape reel rotates with the rotation of the rotating drum, and the measurement is taken out. The tape is wound and held on the winding portion of the tape reel.

Since the tape measure of the present invention is configured as described above, the measuring tape is automatically drawn out of the case and automatically pulled into the case with one gear switching operation without requiring external power. be able to.
Therefore, even when a relatively short dimension is measured several times in a narrow place, it can be easily performed without placing a burden on the finger.

The tape measure of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are diagrams showing the internal mechanism of the tape measure. In this figure, the rotation ratio of the tape reel 1 and the rotating drum 2 is changed by the rotation transmitting means.
FIG. 1 shows the first meshing of the large-diameter gear 1c of the tape reel 1 and the small-diameter gear 2b of the rotating drum 2, that is, the meshing state when the measuring tape 1e is wound and held. FIG. 2 shows the second meshing between the small-diameter gear 1b of the tape reel 1 and the large-diameter gear 2c of the rotating drum 2, that is, the meshing state when the measuring tape 1e is fed out.

Reference numeral 1 denotes a tape reel, 1a denotes a shaft, and a small-diameter gear 1b and a large-diameter gear 1c constituting the tape reel 1 are pivotally supported, and the small-diameter gear 1b and the large-diameter gear 1c rotate synchronously. Reference numeral 1d denotes a rotating drum portion around which the measuring tape 1e is wound, and the rotating drum portion is loosely fitted on the shaft 1a. 1f is a locking piece provided at the tip of the measuring tape 1e, 1g is an operation unit for changing the meshing state (first meshing / second meshing) of the tape reel 1 and the rotating drum 2, and 1h is the measuring tape 1e. This is a guide for guiding the direction to the payout port, and what is shown in this figure is a roller. Reference numeral 1i denotes an engaging pin for transmitting the rotation of the large-diameter gear 1c moving in the direction of the shaft 1a to the rotating body 1d, and 1j denotes a guide for guiding the feeding direction of the measuring tape 1e. Reference numeral 3 denotes a support for supporting the tape reel 1, the rotating drum 2, the guide 1h, and the guide 1j.
Reference numeral 2 denotes a rotating drum, 2a denotes a shaft, and a small-diameter gear 2b and a large-diameter gear 2c constituting the rotating drum 2 are pivotally supported, and the small-diameter gear 2b and the large-diameter gear 2c rotate synchronously. Reference numeral 2d denotes an accommodating portion that accommodates a coil spring 2e (see FIG. 3) serving as an urging means.

FIG. 3 is a side view of the inside of the rotating drum. FIG. 3 shows a state in which a cover for preventing the coil spring 2e from protruding is removed.
A coil spring 2e serving as an urging means is accommodated in the spring accommodating portion 2d. Reference numeral 2f denotes an inner locking end, which is a portion for locking the inner end of the coil spring 2e to the shaft 2a. Reference numeral 2g denotes an outer locking end, which is a portion for locking the outer end of the coil spring 2e to the spring accommodating portion 2d. 2c is a large-diameter gear.

FIG. 4 is a side view of the tape reel, in which a measuring tape 1e is wound around a rotating body 1d. The measuring tape 1e is guided in a direction toward a feeding outlet by a guide 1h, and the measuring tape 1e is fed out. The feeding direction is guided by a guide 1j for guiding Reference numeral 1f denotes a locking piece provided at the tip of the measuring tape 1e.
Reference numeral 1i denotes an engagement pin for transmitting the rotation of the large-diameter gear 1c to the rotary body 1d, and 1c denotes a large-diameter gear.

FIG. 5 is a diagram showing a coil spring state in the rotating drum when the measuring tape is wound, and FIG. 6 is a diagram showing a measuring tape state of the tape reel in the coil spring state of FIG.
The meshing between the tape reel 1 and the rotating drum 2 at this time is when the large-diameter gear 1c of the tape reel 1 and the small-diameter gear 2b of the rotating drum 2 are meshed, that is, the coil spring 2e of the rotating drum 2. The rotating drum 2 is always applied with a rotational force in one direction by the coil spring 2e so that the urging force of the tape reel 1 is larger than the restoring force of the measuring tape 1e of the tape reel 1. Always rotating in one direction. As a result, the measuring tape 1e wound around the rotating drum portion 1d of the tape reel 1 is always wound around the rotating drum portion 1d.

FIG. 7 is a diagram showing the state of the coil spring in the rotating drum when the measurement tape is fed out, and FIG. 8 is a diagram showing the state of the measurement tape on the tape reel when the coil spring is in FIG.
The meshing between the tape reel 1 and the rotating drum 2 at this time is when the small-diameter gear 1b of the tape reel 1 and the large-diameter gear 2c of the rotating drum 2 are meshed, that is, the rotating drum of the tape reel 1. The tape reel 1 always has a rotational force in one direction by the measuring tape 1e, with the gear ratio meshing so that the linear restoring force of the measuring tape 1e wound around the portion 1d is stronger than the biasing force of the coil spring 2e of the rotating drum 2. Accordingly, the measuring tape 1e is fed out in one direction substantially linearly from the rotating body 1d while rotating the tape reel 1 and the rotating drum 2.

FIG. 9 is a partially enlarged view showing an example of the structure of the meshing operation means, that is, an example of a structure for performing an operation for changing the meshing between the tape reel 1 and the rotary drum 2, and by operating the handle 1l. Is what you do.
The front end of the handle 11 is loosely fitted by the shaft 1k to the front end of the shaft 1a that fixes the tape reel 1, and the fulcrum of the handle 11 is fixed to the support member by the shaft 1m.

FIG. 10 is a diagram showing an example of the structure of the internal mechanism, and FIG. 11 is a side view of the rotating body portion of FIG.
This figure shows an example of a structure for transmitting the rotation of the large-diameter gear 1c moving in the direction of the axis 1a of the tape reel 1 part to the rotating body 1d. The transmission gear 1n fixed to the large-diameter gear 1c and the rotating body A receiving gear 1o formed on the inner periphery of the hole through which the shaft 1d passes is meshed. The transmission gear 1n is formed longer than the moving distance of the large-diameter gear 1c in the direction of the shaft 1a so that the engagement with the receiving gear 1o is not disengaged even when the large-diameter gear 1c is farthest from the rotating body 1d.

FIG. 12 is a view showing an internal mechanism of a tape measure of another form. In this figure, the rotation ratio of the tape reel 1 and the rotary drum 2 is changed by the transmission unit 3a provided on the tape reel 1 side. is there.
1 is a tape reel, 1a is a shaft, and a pulley 1p is pivotally supported. Reference numeral 1d denotes a rotating drum portion around which the measuring tape 1e is wound, and the rotating drum portion is pivotally supported on the shaft 1aa. 1f is a locking piece provided at the tip of the measuring tape 1e, 1h is a guide for guiding the direction to the outlet of the measuring tape 1e, and what is shown in this figure is a roller. 1j is a guide for guiding the feeding direction of the measuring tape 1e. 2 is a rotating drum, 2a is a shaft, and a pulley 2h is pivotally supported. Then, the belt 2i is stretched between the pulley 1p and the pulley 2h, and the rotation is transmitted. Reference numeral 2d denotes an accommodating portion that accommodates a coil spring 2e (see FIG. 3) serving as an urging means. Reference numeral 3 denotes a support for supporting each member.

13 and 14 are diagrams showing an example of the internal structure of the transmission unit of FIG. FIG. 13 shows the meshing state of the gears in the transmission unit when the measuring tape 1e is wound and held. FIG. 14 shows the meshing state of the gears in the transmission section when the measuring tape 1e is fed out.
1a / 1aa is a shaft, and the shaft 1a and the shaft 1aa are not connected. The rotation of the shaft 1a is not directly transmitted to the shaft 1aa, and the rotation is transmitted to the small-diameter gear 3b and the large-diameter gear in the transmission section 3a. It is transmitted via each gear of 3c. 3e is a bearing of the shaft 1a / shaft 1aa, and 3d is an operation lever for changing the meshing of the small diameter gear 3b / large diameter gear 3c.

15 and 16 are side views showing an example of a tape measure with the half case removed.
FIG. 15 shows a first gear ratio (rotation ratio) where the biasing force of the coil spring 2e of the rotating drum 2 is stronger than the restoring force of the measuring tape 1e of the tape reel 1, that is, the measuring tape 1e is placed in the case 4 FIG. 16 shows the second meshing state of the gear ratio (rotation ratio) in which the restoring force of the measuring tape 1e of the tape reel 1 is stronger than the biasing force of the coil spring 2e of the rotating drum 2, that is, FIG. 6 is a view in which the measuring tape 1e is being fed out of the case 4. Moreover, the tape measure of this figure is a thing of the form which engages the locking piece 1f with the tape entrance / exit 41. FIG.
Reference numeral 4 denotes a half case on one side, and a mechanism portion is accommodated in the half case 4. Reference numeral 41 denotes a tape inlet / outlet through which the measuring tape 1e enters and exits, and 42 denotes a guide strip that guides the measuring tape 1e up to the tape inlet / outlet 41. 1f is a locking piece provided at the tip of the measuring tape 1e, which is used by being hooked on a measuring member at the time of measurement.

  17 is an internal front view of the tape measure of FIG. 16, wherein 1a is a shaft, 1b is a small-diameter gear constituting the tape reel 1, 1c is a large-diameter gear constituting the tape reel 1, and 1d is wound around the measuring tape 1e. 1f is a locking piece provided at the tip of the measuring tape 1e, 1g is an operation unit for changing the meshing state (first meshing / second meshing) of the tape reel 1 and the rotating drum 2, 1h is a guide for guiding the direction of the measuring tape 1e toward the tape inlet / outlet 41, 1i is an engagement pin for transmitting the rotation of the large-diameter gear 1c moving in the direction of the shaft 1a to the rotary body 1d, and 2c is a rotation A large-diameter gear 2d constituting the drum 2 is an accommodating portion for accommodating a coil spring 2e (see FIG. 3) serving as an urging means.

18 and 19 are side views showing an example of a tape measure with the half case removed.
FIG. 18 shows a first gear ratio (rotation ratio) in which the urging force of the coil spring 2 e of the rotary drum 2 is stronger than the restoring force of the measuring tape 1 e of the tape reel 1, that is, the measuring tape 1 e inside the case 4. FIG. 19 shows a state of the second engagement of the gear ratio (rotation ratio) in which the restoring force of the measuring tape 1e of the tape reel 1 is stronger than the biasing force of the coil spring 2e of the rotating drum 2, that is, FIG. 6 is a view in which the measuring tape 1e is being fed out of the case 4. Moreover, the tape measure of this figure is a thing of the form which draws in the locking piece 1f in the tape entrance / exit 41, ie, a case.
Reference numeral 4 denotes a half case on one side, and a mechanism portion is accommodated in the half case 4. Reference numeral 41 denotes a tape inlet / outlet through which the measuring tape 1e enters and exits, and 42 denotes a guide strip that guides the measuring tape 1e up to the tape inlet / outlet 41. 1f is a locking piece provided at the tip of the measuring tape 1e, which is used by being hooked on a measuring member at the time of measurement.

  FIG. 20 is a side view showing an example of a tape measure from which a semi-case of another form is removed, and the tape measure in this figure omits a guide 1h for guiding the direction of the measuring tape 1e toward the tape inlet / outlet 41. It is. In the embodiment shown in the other figures, the guide 1h is provided, but this guide 1h is added in order to make the feeding of the measuring tape 1e smoother. In both cases, the measuring tape 1e is fed out. However, an arbitrary guide is provided in the vicinity of at least the part where the measuring tape 1e is separated from the rotary drum 1d of the tape reel 1. In the figure, a guide strip 42 is provided as the guide.

FIG. 21 is a side view showing an example of a tape measure from which a half case of another form is removed, and the tape measure of this figure is of a form in which the locking piece 1 f is engaged with the tape doorway 41.
The measuring tape 1e is guided to the tape entrance 41 by the guide strip 42 and the guide wall 43. 4 is a half case on one side, 41 is a tape inlet / outlet through which the measuring tape 1e enters and exits, 42 is a guide strip, 43 is a guide wall, and 1f is a locking piece provided at the tip of the measuring tape 1e. It is used by hooking to

Diagram showing the internal mechanism of the tape measure Diagram showing the internal mechanism of the tape measure Side view inside the rotating drum Side view of tape reel The figure which shows the coil spring state in a rotating drum at the time of measurement tape winding-up The figure which shows the measurement tape state of the tape reel at the time of the coil spring state of FIG. The figure which shows the coil spring state in the rotating drum at the time of measurement tape delivery The figure which shows the measurement tape state of the tape reel at the time of the coil spring state of FIG. Partially enlarged view showing a structure example of the meshing operation means Diagram showing one structural example of internal mechanism Side view of the rotating body of FIG. The figure which shows the internal mechanism of the tape measure of another form The figure which shows an example of the internal structure of the mission part of FIG. The figure which shows an example of the internal structure of the mission part of FIG. Side view showing an example of a tape measure with the half case removed Side view showing an example of a tape measure with the half case removed Internal front view of the tape measure of FIG. Side view showing an example of a tape measure with the half case removed Side view showing an example of a tape measure with the half case removed Side view showing an example of a tape measure with other forms of semi-cases removed Side view showing an example of a tape measure with other forms of semi-cases removed

Explanation of symbols

1-tape reel, 1a-shaft, 1aa-shaft, 1b-small gear, 1c-large gear, 1d-rotating body, 1e-measuring tape, 1f-locking piece, 1g-operating portion, 1h-guide, 1i-engagement pin, 1j-guide, 1k-axis, 1l-handle, 1m-axis, 1n-transmission gear, 1o-receiving gear, 1p-pulley, 2-rotating drum, 2a-axis, 2b-small diameter gear, 2c-large gear, 2d-spring accommodating portion, 2e-coil spring, 2f-inner locking end, 2g-outer locking end, 2h-pulley, 2i-belt, 3-support, 3a-transmission unit, 3b- Small gear, 3c-large gear, 3d-operating lever, 3e-bearing, 4-half case, 41-tape doorway, 42-guide strip, 43-guide wall

Claims (9)

  A tape reel that is rotatably supported to wind a measuring tape formed by an arbitrary member that can return to a substantially straight shape, and a biasing means that biases the measuring tape of the tape reel in the winding direction. It is composed of a supported rotating drum, and the tape reel and the rotating drum are provided so as to be able to transmit rotation by an arbitrary rotation transmitting means, and the rotation transmitting means changes the rotation ratio of the tape reel and the rotating drum, A rotation transmission mode in which the feeding biasing force of the measuring tape wound around the tape reel is greater than the biasing force of the biasing means of the rotating drum, and the measuring tape of which the biasing force of the biasing means of the rotating drum is wound around the tape reel. By selecting one of the rotation transmission modes that is superior to the feeding urging force by any selection means, the measuring tape wound around the tape reel is fed. Tape measure according to claim or that the winding is carried out   The rotation transmission means is a gear, and the tape reel and the rotating drum are formed with two gears having a large diameter and a small diameter with an arbitrary number of teeth orthogonal to the rotation direction. The rotation transmission is performed by the first meshing of the large-diameter gear of the tape reel and the small-diameter gear of the rotating drum or the second meshing of the small-diameter gear of the tape reel and the large-diameter gear of the rotating drum. The superiority or inferiority of the restoring force of the measuring tape of the tape reel and the urging force of the urging means of the rotating drum is reversed by setting the first engagement or the second engagement. Tape measure   The tape measure according to claim 2, wherein the first meshing or the second meshing is performed by moving a gear in an axial direction.   The tape reel includes a gear unit that meshes with the gear of the rotating drum and a rotating drum unit that winds the measuring tape. The gear unit is configured to be able to transmit rotation to the rotating drum unit and move in the axial direction. The tape measure of claim 2, wherein   The rotating drum includes a gear portion that meshes with a gear of the tape reel, and a rotation accommodating portion that accommodates an urging means, and the gear portion is configured to be able to transmit rotation to the rotation accommodating portion and move in the axial direction. The tape measure of claim 2, wherein   3. The tape measure according to claim 2, wherein the rotating drum has a biasing means accommodated in a large-diameter gear.   3. The tape measure according to claim 2, wherein at least three or more gears are formed on the tape reel and the rotary drum.   A tape reel that is rotatably supported to wind a measuring tape formed by an arbitrary member that can return to a substantially straight shape, and a biasing means that biases the measuring tape of the tape reel in the winding direction. The tape reel and the rotating drum are provided so as to be able to transmit rotation by an arbitrary rotation transmitting means, and the rotation ratio of the tape reel and the rotating drum is changed by an arbitrary rotation ratio changing means. The rotation transmission form in which the feeding biasing force of the measuring tape wound around the tape reel is superior to the biasing force of the biasing means of the rotating drum, and the measurement of the biasing force of the biasing means of the rotating drum being wound around the tape reel. By selecting any one of the rotation transmission modes that is superior to the tape feeding and energizing force by any selection means, the measurement tape wound around the tape reel is selected. Measuring tape, characterized in that the feeding or the winding is performed 9. The measuring tape according to claim 1, wherein the measuring tape is entirely wound and accommodated in a case.

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