JP2000079794A - Ruler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a positioning without generating a positional shift at the time of a usage, and smoothly move a ruler by arranging a spring member which is warped upward at the central portion of the ruler main body, and constituting the ruler in such a manner that a slip preventive member may protrude on the lower surface of the ruler main body by interlinking with the pressing of the spring member. SOLUTION: A ruler main body 1 is formed of a plastic, and on the surface end portion supporting portions 2, 2 for a spring member and protruding lines 3, 3 for reinforcement are integrally formed on the whole body and into a frame shape. Also, a plate-form spring member of which the central portion is expanded upward and warped into an approx. bow-shape, is provided, and at locations closer to both ends, shaft pins 5, 5 are penetrated and held, and both ends of the shaft pins 5, 5 are projected from the plate-form spring member. When the plate-form spring member is pressed and brought into contact with the ruler main body 1, on the shaft pins 5, 5, a more force to advance to the outsides of the end portions of the plate-form spring member 4 is generated, and both ends of the ruler main body 1 are warped up, and the central lower surface of the ruler main body 1 is firmly pressed onto a paper surface or the like, and an anti-slip rubber piece protrudes, and a line-drawing or the like can be stably performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a ruler, mainly a ruler used as a guide for drawing or cutting a line on an object surface such as paper, without causing any displacement during use. The present invention relates to a ruler capable of obtaining a smooth slide when moving from one place to another.

[0002]

BACKGROUND OF THE INVENTION Generally, the above-mentioned ruler is formed of plastic, wood, bamboo, metal or the like, and is to be brought into planar contact with the surface of an object to be drawn. Usually, when drawing a line using this ruler, the ruler is pressed from above with the fingertip of one hand, the writing tool is held with the other hand, and the tip of the writing tool is made to follow the edge of the ruler.

[0003] Here, it is difficult for the fingertip that presses the ruler to cover the entire ruler, and it becomes a point. Therefore, the pressing portion serves as a fulcrum. It becomes the point of action, and the ruler is rotated. In order to prevent this, the presser force must be increased, and the work becomes tired.

[0004] A ruler provided with a handle is also known. However, in actual work, the handle is obstructive, and in addition, storage and carrying of the handle are hindered.

Further, there is a ruler in which a non-slip material such as a rubber sheet is stuck on the back surface of the ruler. In this case, however, it is extremely inconvenient to move the ruler to another position.

When cutting is performed using a ruler, the edge of the ruler may be damaged by the cutter, and the ruler itself may be unusable.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides the above-mentioned conventional situation
It was made by focusing on the problem, and it was decided to eliminate such a problem, to be positioned without causing displacement during use, and to be able to perform smoothly when shifting the position of the ruler. The purpose is to provide a ruler with a detachable option for a cutter, which can be performed with one touch of pressing and releasing one point.

[0008]

In order to achieve this object, a ruler according to the present invention comprises a ruler body having a spring member having a central portion curled upward on the surface of the ruler body, and interlocking with the pressing of the spring member. , Characterized in that the anti-slip member is configured to protrude from the lower surface of the ruler body, the above-mentioned spring member is characterized by being a plate material, and the above-mentioned spring member is characterized by being a rod material. .

Further, the present invention is characterized in that the anti-slip member is a replaceable rubber piece, and the anti-slip member is a balloon which expands by pressing a spring member. It is characterized in that a plurality of members are provided.

Further, the present invention is characterized in that a cutter guide is detachably provided on at least one side, and the spring member is branched, and a wire is connected to the spring member. And a link and a cam mechanism are connected to the spring member.

The present invention is characterized in that an end support portion of the spring member is provided on the surface of the ruler body, and the spring member can be moved in and out integrally with the support portion. A reinforcing ridge is provided in a frame shape, a point mark for pressing is provided at the center of the spring member, and a plurality of plate members or bar members are connected as the spring member. And a movable guide is provided, and a stopper is provided for preventing the above-mentioned spring material from exceeding a dead point.

With the above construction, the ruler is placed on the target paper surface or the like at the time of use, and the anti-slip member protrudes by pressing the spring member with the fingertip of one hand to position the ruler on the paper surface or the like. In addition, even if a force by the writing instrument is applied to the edge, no displacement occurs. Also, by relaxing the pressing force, the anti-slip member returns to the initial state,
The position can be smoothly moved, and the operation can be performed with one touch.

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is an overall perspective view of a ruler embodying the present invention, FIG. 2 is a schematic cross-sectional view of an end of the ruler, FIG. 3 is a schematic cross-sectional view of another end of the same ruler, and FIG. , FIG. 5 is a cross-sectional view from another direction, FIG. 6 is an end cross-sectional view when it is used, FIG. 7 is an overall plan view, FIG. 8 is a side view, FIG. FIG. 11 is an exploded perspective view showing a mounting structure of a rubber piece, FIG. 12 is a side view showing another example, FIG. 13 is a partial perspective view showing a mounting structure of a cutter guide, and FIG. Is a schematic view of an end showing another example, FIG. 15 is a schematic view of a case where a wire is interposed, FIG. 16 is a schematic view of the end similarly, and FIG. 17 is a schematic view showing another example of an interposed wire. 18 is a diagram showing a coupling operation state, FIG. 19 is a schematic diagram showing an example in which a cam and a wire are also interposed, 20 also schematically before use end, FIG. 21 is also a schematic diagram in use, FIG. 2
2 (A), (B) and (C) are schematic side sectional views showing an example in which a balloon is interposed, FIG. 23 is a plan view of the same, FIG. 24 is a perspective view of an essential part showing an example of a support structure of a spring member, 25 is a side view showing an example in which a plate-shaped spring member is superimposed, FIG. 26 is a perspective view of a main part showing an example of a support structure of the spring member, FIG. 27 is a perspective view of the same main part, and FIG. FIG. 29 is a schematic diagram of an example in which a wire and a link are also interposed, FIG. 30 is a plan view of the main part, FIG. 31 is a side view of the main part, FIG. 32 is a partial perspective view showing a compressor mechanism for sending air, FIG.
3 is a plan view showing an application example to a triangle ruler, FIG. 34 is a plan view showing another example of the same, FIG. 35 is an enlarged view of a mounting portion of a cutter guide, and FIG. 36 is a view showing an application example to a triangle ruler. 37 is a plan view showing another example, FIG. 38 is a plan view showing another example, FIG. 39 is a schematic side view of an example using a bar as a spring member, and FIG. FIG. 41 is an end view along line A, FIG. 41 is a side view showing a mechanism of another example, FIG.
2 is a plan view of the same, and FIG. 43 is a plan view of a main part showing a modification of the same.

In these figures, reference numeral 1 denotes a ruler main body, and this ruler main body 1 is formed of plastic in this embodiment. On the surface of the ruler main body 1, end support portions 2, 2 of a spring member, which will be described later, and reinforcing ridges 3, 3 are integrally formed in a frame shape as a whole.

Further, in the figure, reference numeral 4 denotes a plate-like spring member whose central portion is bulged upward and warped in a substantially arcuate shape. This plate-like spring member 4 is also made of plastic in this embodiment. The portion is formed thin and the central portion is formed thick. The width of the plate-like spring member 4 substantially matches the size between the reinforcing ridges 3.

In the present embodiment, shaft pins 5 and 5 are penetrated and held near both ends of the plate-shaped spring member 4, and both ends of the shaft pins 5 and 5 are connected to the plate-shaped spring member 4. Projecting from

On the other hand, on the inner surfaces of the reinforcing projections 3, 3, fitting holes 6, 6,... For fitting both ends of the shaft pins 5, 5 are formed. It is desirable that 6 is an oval shape which is larger than the diameter of the shaft pin 5 and is long in the vertical direction. The positions of the fitting holes 6, 6,... Are higher than the center line X of elasticity when the ruler main body 1 and the plate-shaped spring member 4 are overlapped.

Further, a point mark 7 is provided at the center of the plate-shaped spring member 4 as a mark for confirming the position at the time of pressing.

In the vicinity of both ends of the ruler body 1, window holes 8, 8 which are rectangular on the lower surfaces of the end support portions 2, 2 are provided.
The movable plate 9 having a projecting portion 9a that fits into the window hole 8, straddling the window holes 8, 8 is provided by being elastically provided at four places by coil springs 10, 10,. .

At the lower surface of the projection 9a of the movable plate 9, mounting holes 9b, 9b,... Are provided at four corners and at the center, and the upper surfaces of the non-slip rubber pieces 11 are provided in the mounting holes 9b, 9b,. Fitting pins 11a, 11a protruding from
Are snap-in engaged, so that the rubber piece 11 is mounted. Due to such a configuration, the rubber piece 11 can be replaced when worn. Reference numeral 9c denotes a cutout for inserting the tip of a flathead screwdriver or the like when removing the rubber piece 11 and prying it. In the initial state, the lower surface of the end of the plate-shaped spring member 4 is in contact with the upper surface of the movable plate 9, and the rubber piece 11 is located in the window hole 8.

Further, when the plate-shaped spring member 4 is mounted, for example, as shown in FIG. 3, the end surface of the plate-shaped spring member 4 is engaged with an arc-shaped concave portion 2a formed on the inner surface of the end support portion 2. Alternatively, the inner surface of the end support portion 2 may be formed in a tapered shape, and the end of the plate-shaped spring member 4 may be dropped off.
A configuration in which the window hole 8 is framed at a position recessed from the bottom surface of the ruler main body 1, and rubber pieces are directly provided thereon, and the rubber pieces are directly pushed and protruded from the lower surfaces at both ends of the plate-shaped spring member 4. And so on.

On the other hand, reference numeral 12 denotes a cutter guide, and the cutter guide 12 is set on a groove-like mounting portion formed on the lower surface of one edge of the ruler body 1 along the longitudinal direction. The cutter guide 12 has mounting flanges 12a, 12b, and 12c integrally formed on the upper surface thereof.
The mounting flanges 12a and 12c are formed with a horizontally long mounting hole 12d, and the center 12b is formed with a general mounting hole. 12b is normally fixed by a screw 13, but in 12a and 12c, the screw 13 is slightly floated and a space S is provided in order to allow movement.

The above is the basic configuration of the present invention. Here, the operation will be described. First, the ruler main body 1 is placed on a target paper surface or the like, and the center of the plate-shaped spring material 4 is pressed according to the point mark 7. The resilience of itself is transmitted to both ends to lower the shaft pin 5 along the fitting holes 6. Along with this lowering, both ends of the plate-like spring member 4 push the top surface of the movable plate 9, and the coil springs 10, 10.
Descends through the window hole 8 to project the rubber piece 11 into the window hole 8.

The protrusion of the rubber piece 11 causes the ruler body 1
When the plate-shaped spring material 4 is pressed and brought into contact with the ruler body 1, the position of the shaft pin 5 is changed to the ruler body 1, the reinforcing ridge 3 and the plate-shaped spring material 4. Above the center line X of the elasticity obtained by superimposing the elastic force, a force is generated in which the shaft pins 5 and 5 move outward from the ends of the single-plate spring material 4, and both ends of the ruler main body 1 warp up. The lower surface of the center of the ruler body 1 is strongly pressed onto a sheet of paper or the like and positioned. (See FIGS. 9 and 10, T
Indicates a table)

At the time of work, the reinforcing ridges 3, 3
The plate-like spring member 4 is in a stored state therebetween, so that the drawing or the like can be stably performed. When the position of the ruler body 1 is changed, the mechanism is restored to the initial state by releasing the pressing on the plate-shaped spring material 4, and a smooth transition can be performed.

Also, when the cutter guide 12 is mounted, the space S is provided for the mounting flanges 12a and 12c on the side side so that the mounting holes 12d are horizontally long and the screws 13 are floated. It is possible to follow.

Further, when the ruler body 1 is long, as shown in FIG. 12, a frame into which a short plate-like spring member 14 is fitted may be provided, and the frame may be overlapped with the plate-like spring member 4. In addition, the movable plate 9 described above is also provided at the center of the lower surface of the ruler body 1.
It is also possible to attach a mechanism of (1).

In addition to the basic configuration described above, the following modified examples can be applied. FIG. 14 shows the movable plate 9 having a single coil spring 10.

In FIG. 15, a short plate-like spring member 4 is arranged at the center of the ruler main body 1, and the wire 15 is actuated in accordance with the pressing deformation of the plate-like spring member 4 to project the rubber piece. In this case, not only the end but also the lower surface of the ruler body 1
A series of rubber pieces may be projected. That is, the wire 15 is arranged to be hung on rollers 16, 16... And holds the tension. The wire 15 pulls or presses the support portions 16 at both ends by the pressing of the plate-shaped spring material 4, and the force is applied. The rubber piece 11 is projected.

The rubber piece 11 can be moved in and out by interposing an arc-shaped link bar 17 as shown in FIG. 16 and moving the link bar.

In the case shown in FIG. 17, the wire 15 is also interposed. In this case, an overall reinforcing portion is formed on the upper surface of the ruler main body 1 in the longitudinal direction, and the central portion of the reinforcing portion is provided at the central portion of the reinforcing portion. A window hole is provided, and the spring material 4 is fitted in the window hole as an operation portion. Lateral grooves 18 are provided on both lower edges of the spring material 4, and a work bar 19 is provided in the lateral holes 18, 18. Engagement pins 19a, 19a provided at one end of
Are engaged.

The tips of the working bars 19, 19 are bent at an obtuse angle, and the ends of the wires 15 are connected to the tips thereof.
0a and 20 are connected to each other, and 19a slides in the lateral slot 18 and moves toward each other by the pressing of the spring material 4, but the tip of the work bar 19 rotates and lifts with the 19a as a fulcrum, The support 20 is pulled. The rubber piece is projected using the tensile force as a load.

FIG. 19 shows a further application of the example shown in FIG.
1, one end of which is pivoted, and its link bar 21,
The other end of the wire 21 is connected to the end of the wire 15, and the other end of the wire 15 is connected to the support 22. That is, when the spring material 4 is pressed and lowered, the link bars 21 and 21 rotate about the pivot point, lift the connected wires 15 and 15 and apply a tensile force to the support portions 22 and 22. Is used as a load to project the rubber piece.

The rubber piece 11 using the wire 15
The protrusion of the rubber piece 1 is, for example, as shown in FIGS.
1 can be rotated by rotating the roller 23, which is in contact with the rubber piece 11 in an eccentric state.
Can be more effective.

In the present invention, a rubber balloon can be used as the slip preventing member. In this case, a ridge 4a for pressing operation is integrally formed on the lower surface of the plate-shaped spring member 4 and is in contact with a part of the compression ball 24. Tubes 25, 25 are connected to both ends of the compression ball 24, and are directly connected to the tips of the tubes 25, 25.
Alternatively, balloons 26, 26 having thicker bottoms are connected from above or from the side through a joint 25a. The balloon 26 is accommodated in boxes 27, 27 in order to suppress the lateral expansion. The compressed ball 24 is relatively large when sending gas such as air, and small when sending liquid such as water. In the drawing, reference numeral 28 denotes a partition for regulating the escape of the compressed ball 24.

In this case, the plate-shaped spring material 4 and the end support 2
As shown in FIG. 24, the end of the spring member 4 is formed in a round shape, and a receiving part corresponding to the end is formed in the end supporting part 2, or as shown in FIG. The pin pole 29 having the head 29a may be erected, and the engaging notch 30 formed at the tip of the spring member 4 may be engaged with the pin pole 29.

Further, a hole may be formed in the end of the spring material 4 and joined through the hole with a pin pole 29. In the case of an engagement configuration, two ends of the spring material 4 are straightened. May be engaged with the pin poles 29, 29.

When the end portion of the spring member 4 is fixed as described above, the elasticity of the ruler body 1 and the spring member 4 is greater than that of the spring member 4 if the spring member 4 is thicker. Thus, two spring members in opposite warp states as shown in FIG. 25 can be used together.

Further, as an application example using the above-mentioned link bars 21, 21, it is also possible to configure as shown in FIGS. 29 to 31. In this example, horizontally long holes 31, 31 are provided at both ends of the lower edge of the spring member 4 (operator), so that link bars 21, 2 are provided.
One end is pivotally supported, and tension rollers 32, 32 are attached to the other ends of the link bars 21, 21, respectively. The tension roller 32 and the wire 15 are in contact with each other. The link bar 21 rotates as the spring material 4 is pressed and lowered, and the tension roller 32 lifts the wire 15. The link bar 21 has a two-plate structure,
In the meantime, the tension roller 32 and the guide roller 33 are sandwiched, and the rotation of the link bar 21 causes the guide roller 33 to rotate.
Presses the wire 15 from above to below.

FIG. 32 shows an application of the above-described example using a balloon.
The hemispherical pressing button 35 is formed on the lower surface of the spring member 4 so as to match the top surface of the compressor 34.

Next, FIG. 33, FIG. 34, FIG. 36, FIG.
FIG. 38 is an example in which the present invention is applied to a triangle ruler, and the installation position of the spring material 4 can be selected according to the side used by the triangle ruler 36. When it is desired to strongly position the whole as shown in FIGS. 36 and 38, the spring member 37 can be formed in a cross shape, or can be deformed into a radial shape with a pitch of 120 degrees shown as 38. It is needless to say that such an application can be applied to a deformation ruler such as a cloud ruler, and the spring material can also be formed in a circular dome shape, and the anti-slip material can be projected along the shape.

FIGS. 39 and 40 show a rod-shaped spring member 39 used as a spring member. In this case, a spherical fitting member 40 is provided at the end of the rod-shaped spring member 39, and the fitting member 40 is provided. The united portion 40 is engaged with a spherical concave portion 41 formed on the inner surface of the end support portion 2, and has a kind of ball joint structure. The rod-shaped spring member 39 is attached to the ruler body 1.
Pressing and returning are guided by valleys 43 formed along the longitudinal direction on a receiving body 42 provided on the surface of the receiving member 42.

Next, FIGS. 41 to 43 show examples of further application. In this embodiment, the plate-like spring member 4 includes a central short plate 44 and its short plate 44.
And long plates 45, 45 arranged on the left and right of the camera. The connection between the short plate 44 and the long plates 45, 45 is intermeshing in the form of a comb, and the pins 46, 46 are inserted.

The ends of the long plates 46, 46 are formed in a rounded shape, and are in rolling contact with the operating portion of the anti-slip member to move the short plate 44 up and down. And the above-mentioned pins 4 on the inner surfaces of the reinforcing ridges 3, 3.
Grooves 47, 47 for guiding the ends of 6, 6 are formed.

Further, instead of or in addition to the above-mentioned grooves 47, 47, projections 44a, 44a are formed on the side surfaces of the short plate 44, and the grooves 48, 48 for guiding the projections 44a, May be formed on the inner surface of the protruding piece 44a.
Are formed on the inner surfaces of the reinforcing ridges 3 and 3, and the guide grooves 4 are formed.
8 and 48 may be formed on the side surface of the short plate 44.

Further, reference numeral 49 in the figure denotes a stopper for preventing the short plate 44 from being returned to the initial state beyond the dead center lowered by pressing.
9 is formed in a thin plate-like step shape in the present embodiment,
It is also possible to use a protrusion or the like.

[0047]

The ruler according to the present invention is constructed and operates as described above. For this reason, it is firmly positioned during use, and the position can be shifted smoothly.In addition, the cutter guide makes it easy to use the cutter without damaging the ruler body. ing.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a ruler embodying the present invention.

FIG. 2 is an end schematic sectional view.

FIG. 3 is an end schematic sectional view showing another example.

FIG. 4 is an end sectional view in which a mechanism is assembled.

FIG. 5 is a cross-sectional view from another direction.

FIG. 6 is an end cross-sectional view in use.

FIG. 7 is an overall plan view.

FIG. 8 is a side view.

FIG. 9 is a side view at the time of change.

FIG. 10 is a cross-sectional view when used on a table.

FIG. 11 is an exploded perspective view showing a mounting structure of a rubber piece.

FIG. 12 is a side view showing another example.

FIG. 13 is a partial perspective view showing a mounting structure of a cutter guide.

FIG. 14 is a schematic end view showing another example.

FIG. 15 is a schematic view when a wire is interposed.

FIG. 16 is a schematic end view.

FIG. 17 is a schematic view showing another example in which a wire is interposed.

FIG. 18 is a view showing a coupling operation state.

FIG. 19 is a schematic view showing an example in which a cam and a wire are interposed.

FIG. 20 is a schematic view of an end before use.

FIG. 21 is a schematic view during use.

FIG. 22 is a schematic side view showing an example in which a balloon is interposed.

FIG. 23 is a plan view.

FIG. 24 is a perspective view of an essential part showing an example of a support structure of a spring member.

FIG. 25 is a side view showing an example in which a plate-shaped spring member is superimposed.

FIG. 26 is a perspective view of an essential part showing an example of a support structure of a spring member.

FIG. 27 is a perspective view of a main part.

FIG. 28 is a plan view of a main part.

FIG. 29 is a schematic view of an example in which a wire and a link are interposed.

FIG. 30 is a plan view of a main part.

FIG. 31 is a side view of a main part.

FIG. 32 is a partial perspective view showing a compressor mechanism for sending air.

FIG. 33 is a plan view showing an application example to a triangle ruler.

FIG. 34 is a plan view showing another example.

FIG. 35 is an enlarged view of a mounting portion of a cutter guide.

FIG. 36 is a diagram showing an application example to a triangle ruler.

FIG. 37 is a plan view showing another example.

FIG. 38 is a plan view showing another example.

FIG. 39 is a schematic side view of an example in which a bar is used as a spring member.

FIG. 40 is an end view along the line AA in FIG. 39;

FIG. 41 is a side view showing a mechanism of another example.

FIG. 42 is a plan view.

FIG. 43 is a plan view of relevant parts showing a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ruler main body 2 End support part 3 Reinforcement protrusion 4 Plate-shaped spring member 5 Shaft pin 6 Fitting hole 7 Point mark 8 Window hole 9 Movable plate 10 Coil spring 11 Rubber piece 12 Cutter guide 13 Screw 14 Short spring Material 15 Wire 16 Roller 17 Link Bar 18 Horizontal Slot 19 Work Bar 20 Support 21 Link Bar 22 Support 23 Roller 24 Compressed Ball 25 Tube 26 Balloon 27 Box 28 Partition 29 Pin Pole 30 Notch 31 Horizontal Slot 32 Tension Roller 33 Guide Roller 34 Compressor 35 Pressing button 36 Triangular ruler 37 Cross-shaped spring material 38 Radial spring material 39 Rod-shaped spring material 40 Fitting body 41 Spherical concave part 42 Receiver 43 Valley part 44 Short plate 44a Projection piece 45 Long plate 46 Pin 47 Groove 48 Groove 49 Stopper

Claims (15)

[Claims] 1. A spring member having a central portion warped upward on a surface of a ruler body, and interlocked with the pressing of the spring member,
A ruler characterized in that an anti-slip member protrudes from the lower surface of the ruler body. 2. The ruler according to claim 1, wherein the spring member is a plate. 3. The ruler according to claim 1, wherein the spring member is a bar. 4. The ruler according to claim 1, wherein the slip prevention member is a replaceable rubber piece. 5. The ruler according to claim 1, wherein the anti-slip member is a balloon that expands when pressed by a spring member. 6. The apparatus according to claim 1, wherein a plurality of said spring members are provided.
Or the ruler according to claim 5. 7. A ruler according to claim 1, wherein a cutter guide is detachably provided on at least one side. . 8. The method according to claim 1, wherein the spring member is branched. ruler. 9. A wire is connected to the spring member described above, wherein the wire is connected to the spring member. Item 9. The ruler according to Item 8. 10. The system according to claim 1, wherein a link and a cam mechanism are connected to said spring member. 7. A ruler according to claim 8 or claim 9. 11. The ruler body according to claim 1, wherein an end support portion of the spring member is provided on a surface of the ruler main body. Claim 6, Claim 7, Claim 8, Claim 9, or Claim 10
Ruler described in. 12. The frame according to claim 1, wherein a reinforcing ridge through which the spring member can enter and exit is provided integrally with the support portion. The ruler according to claim 4, claim 5, claim 6, claim 7, claim 8, claim 9, claim 10, claim 10, or claim 11. 13. The spring member according to claim 1, further comprising a pressing point mark at the center of said spring member. Claim 7, Claim 8, Claim 9, Claim 10, Claim 11
Or the ruler according to claim 12. 14. The spring member according to claim 1, wherein a plurality of plate members or rod members are connected and a movable guide is provided. , Claim 11, claim 12, or claim 1
The ruler according to 3. 15. The ruler according to claim 14, further comprising a stopper for preventing the spring member from exceeding a dead point.