TW201600290A - Multi-point tool, positioning mechanism of multi-point tool, scribing head and scribing device - Google Patents

Abstract

When carrying out scribing, the multi-point tool, positioning mechanism of multi-point tool, scribing head and scribing device of the present invention can fix the sharp point positions of the multi-point tool having a plurality of sharp points and easily change the sharp point position. The multi-point tool 30 has first notches 34-41 that become the scribing sharp points, and deeper second notches 42-49 which are formed at an equal interval in between the first notches. The blade tip fixing pin 60 comprises a pair of protruding parts 61a, 61b corresponding to the interval of the second notches of the multi-point tool 30, and a through hole 42 formed obliquely relative to the shaft. During the scribing, the pair of protruding parts 61a, 61b is pressed to be fixed to the groove of the second notches. The through hole of the blade tip fixing pin 60 is inserted with a lock pin, which is formed by matching up two opposite cone-shaped parts, and locking and unlocking are achieved by changing the position.

Description

Multi-point tool, multi-point tool positioning mechanism, scribing head and scoring device

The present invention relates to a multi-point tool for scribing a substrate of a brittle material such as a glass substrate or a crucible wafer by a diamond point, a positioning mechanism for fixing the multi-point tool, and a built-in mechanism The marking mechanism and the scoring device of the positioning mechanism.

Conventionally, in order to scribe a glass substrate or a tantalum wafer, a tool using a diamond cusp having a score wheel or a single crystal diamond is used. For the glass substrate, the scriber wheel is generally used for rolling with respect to the substrate. However, from the viewpoint of improving the strength of the substrate after the scribe, the diamond cusp using the fixed blade is also reviewed. Patent Documents 1 and 2 mention a sharp point cutter for marking a high hardness substrate such as a sapphire wafer or an alumina wafer. In these patent documents, a tool having a sharp point for cutting on a ridge line of a pyramid or a tool having a tip end tapered is used. Further, in Patent Document 3, in order to scribe a glass plate, there is mentioned a scribing device which uses a glass scribing tool having a conical front end.

Patent Document 1: Japanese Laid-Open Patent Publication No. 2003-183040

Patent Document 2: Japanese Laid-Open Patent Publication No. 2005-079529

Patent Document 3: Japanese Laid-Open Patent Publication No. 2013-043787

Since the cusp will wear (wear) if it is scored with a conventional tool, there is It is necessary to change the cusp. The apex that becomes a vertex in a pyramidal or conical tool is two or a maximum of four. Therefore, there is a problem that the tool must be replaced when changing the sharp points of two parts or four parts, and the frequency of replacement is high. Furthermore, in order to change the tool, it is necessary to center and rotate the axis of the holding tool, and it is difficult to accurately adjust the angle of the pointed contact substrate.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a multi-point tool and a multi-point tool capable of easily changing and fixing a cusp position even when sharp point wear is used in scribing. The positioning mechanism, the scribe head and the scribe device that house the positioning mechanism.

In order to solve the problem, the positioning mechanism of the multi-point tool of the present invention performs positioning of a multi-point tool that is rotatably mounted on the scribing head; the multi-point tool has a plurality of outer circumferences formed on the base of the rotationally symmetric body In the first notch, a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin and has a second end of the multi-point tool at one end a pair of protrusions having the same interval of the notch, having a through hole inclined at the center with respect to the other axis perpendicular to the axis; and a locking pin inserted into the through hole of the front end of the blade fixing pin, by fixing the pin with the tip end of the blade The shaft slides vertically and the multi-point tool is locked and unlocked by the front end fixing pin.

In order to solve the problem, the positioning mechanism of the multi-point tool of the present invention performs positioning of a multi-point tool that is rotatably mounted on the scribing head; the multi-point tool has a plurality of outer circumferences formed on the base of the rotationally symmetric body In the first notch, a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin and has a second end of the multi-point tool at one end a pair of protrusions having the same interval of the notches, having a sagging in the center Straightly forming a crank-like through hole; and a locking pin inserted into the through hole of the front end fixing pin of the blade, which slides perpendicularly to the axis of the front end fixing pin and fixes the pin by the front end of the blade The multi-point tool is locked and unlocked.

Here, the lock pin may be formed such that the tapered tapered portions of the front end are opposed to each other, and the tapered portion is inserted into the through hole of the front end fixing pin of the blade.

Here, it may also be: further having a slider for rotating the multi-point tool at a predetermined angle.

In order to solve the problem, the multi-point tool of the present invention is rotatably attached to the scribing head; the multi-point tool has a plurality of first notches formed on the outer periphery of the base of the rotationally symmetric body, and between the first notches A plurality of second notches deeper than the first notch are formed at equal intervals, and the pin is restrained from rotating at the tip end of the second notch abutting blade at the time of scribing.

In order to solve the problem, the scribe head of the present invention includes a multi-point tool mounted in a rotatable manner and a positioning mechanism of the multi-point tool; the multi-point tool has a plurality of stages formed on the outer periphery of the base of the rotationally symmetric body a notch, a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin and a second notch of the multi-point tool at one end a pair of protrusions having the same interval, a through hole having a center inclined with respect to the other axis perpendicular to the axis; and a lock pin inserted into the through hole of the front end of the blade fixing pin, and the pin is fixed to the front end of the blade The shaft slides vertically and the multi-point tool is locked and unlocked by the front end fixing pin.

Here, it may be further provided with a slider for rotating the multi-point tool at a predetermined angle.

In order to solve the problem, the scoring device of the present invention has a scribing head and is rotated from a multi-point tool mounted on the scribe head and a positioning mechanism of the multi-point tool; the multi-point tool has a plurality of first notches formed on the outer circumference of the base of the rotationally symmetric body, and is placed between the first notches a plurality of second notches deeper than the first notch are formed at intervals; the positioning mechanism includes a blade distal fixing pin, and has a pair of protrusions at the one end equal to the interval between the second notches of the multi-point tool, and is centrally a through hole having a tilt with respect to another axis perpendicular to the axis; a lock pin inserted into the through hole of the front end fixing pin of the blade, sliding perpendicularly to the axis of the front end fixing pin of the blade and fixing the pin by the front end of the blade And the multi-point tool is locked and unlocked; and the slider rotates the multi-point tool by a predetermined angle.

According to the invention having such a feature, the multi-point tool can be fixed by engaging the projection of the blade distal end fixing pin with the second notch. Further, when the cusp position is changed, the cusp can be easily adjusted to the same position by releasing the lock and rotating the tool a predetermined angle and then locking it again. Therefore, an effect that the cusp switching of the multi-point tool can be easily performed can be obtained. Further, even if the tool is rotated, since the angle at which the ridge line of the tip end of the lower blade contacts the substrate is not changed before the tool, the contact angle of the cusp with respect to the substrate can be easily adjusted.

22‧‧‧Scratch

24‧‧‧ Pressure Giving Department

25‧‧‧Tools Maintenance Department

26‧‧‧Linear drive department

27‧‧‧Sliding holder

28‧‧‧Linear drive department

30‧‧‧Multi-point tools

31‧‧‧ Pedestal

32‧‧‧through holes

33‧‧‧Grinding surface

34~41‧‧‧1st gap

42~49‧‧‧2nd gap

60, 80‧‧ ‧ blade front end fixing pin

61a, 61b‧‧‧ protrusions

62, 81‧‧‧through holes

63‧‧‧Lock pin

64a, 64b‧‧‧ cone

65, 66‧‧‧ cylindrical

67‧‧‧ Spring

68‧‧‧Sliding parts

68a, 68b, 68c‧‧‧ protrusions

Fig. 1 is a perspective view showing a scoring apparatus according to an embodiment of the present invention.

Fig. 2 is a front view and a side view of a multi-point tool used in the positioning mechanism of the embodiment of the present invention.

Fig. 3A is a schematic view showing a state in which the scribe head of the positioning mechanism is locked in the first embodiment of the present invention.

Fig. 3B is a schematic view showing the unlocking of the scribe head in which the positioning mechanism is housed in the first embodiment of the present invention.

Fig. 4 is a perspective view and a cross-sectional view showing a blade distal end fixing pin of the embodiment.

Fig. 5 is a perspective view showing the lock pin of the embodiment.

Fig. 6A is a schematic view showing a scribed head of the built-in slider holding mechanism of the embodiment.

Fig. 6B is a schematic view showing the scribed head of the built-in slider holding mechanism of the embodiment.

Fig. 7 is a view showing a state in which a multi-point tool fixed by a positioning mechanism is used for scribing in a first embodiment of the present invention, and a view showing a state in which a multi-point tool is rotated.

Fig. 8 is a view showing a state in which the multi-point tool is rotated and a state in which the multi-point tool after the rotation is used for scribing.

Fig. 9A is a schematic view showing the locking of the scribe head in which the positioning mechanism is housed in the second embodiment of the present invention.

Fig. 9B is a schematic view showing the unlocking of the scribe head in which the positioning mechanism is housed in the second embodiment of the present invention.

Fig. 1 is a schematic perspective view showing an example of a scoring apparatus according to an embodiment of the present invention. In the scribing device 10, the moving table 11 is held to be movable in the y-axis direction along the pair of guiding rails 12a, 12b. The ball screw 13 is screwed to the moving table 11. The motor 14 moves the movable table 11 in the y-axis direction along the guide rails 12a and 12b by rotating the ball screw 13. A motor 15 is disposed above the mobile station 11. Motor 15 rotates platform 16 in the xy plane to a predetermined angle. The brittle material substrate 17 is placed on the stage 16 and held by a vacuum suction means or the like (not shown). On the upper portion of the scoring device, an alignment mark for the brittle material substrate 17 is provided Two CCD cameras 18a and 18b for photographing are recorded.

In the scribing device 10, the bridge 20 is bridged by the stays 21a, 21b in the x-axis direction so as to straddle the mobile station 11 and the platform 16 above it. A linear motor 23 holding the scoring head 22 is provided in the bridge 20. The linear motor 23 linearly drives the scribing head 22 in the x-axis direction. The tool holding portion 25 is attached to the pressure applying portion 24 that applies pressure to the tip end of the blade by the scribing head 22. The tool holding portion 25 holds the multi-point tool 30 at the lower end and presses it against the surface of the brittle material substrate 17 with an appropriate load, and rotates the multi-point tool 30 by a predetermined angle when the tip end of the blade is worn.

Next, a multi-point tool according to an embodiment of the present invention will be described. Fig. 2 is a front view and a side view showing an example of a multi-point tool 30 fixed by a positioning mechanism in the embodiment. The multi-point tool 30 uses a single crystal diamond to form a base 31 having a rotationally symmetrical shape such as a circular plate, and has a through hole 32 at the center thereof. As shown in the side view of Fig. 2(a), the both ends of the circumferential portion are polished into a V shape to form a blade tip end portion 33 composed of a ridge line and an inclined surface. Further, as shown in the figure, the first notches 34 to 41 are formed by laser processing, electric discharge machining, mechanical polishing or the like at eight locations on the circumference of the blade tip end portion 33. The focus of the first notch and the ridge line is used as a sharp point. Further, each of the first notches is formed at equal intervals, and the second notches 42 to 49 having a deeper V shape are formed at equal intervals in the middle portion of the notch by laser processing, electric discharge machining, mechanical polishing or the like.

3A is a schematic view showing a state in which the tool holding portion 25 of the scribing head 22 in which the positioning mechanism is housed is locked, and FIG. 3B is a schematic view showing the state in which the lock is released, and only the blade distal end fixing pin 60 is used. The profile is shown. As shown in the drawings, the multi-point tool 30 is rotatably attached to the end portion of the tool holding portion 25 by inserting a pin (not shown) into the through hole 32. Further, in order to prevent the multi-point tool 30 from rotating during the scribing, the blade distal end fixing pin 60 is fixed to the second notch of the two portions of the multi-point tool. The blade front end fixing pin 60 can be slightly above and below The lock pin 63 is used in order to lock the multi-point tool 30 by the blade distal end fixing pin 60.

Next, the blade distal end fixing pin 60 will be described in detail. The blade distal end fixing pin 60 is a cylindrical member as shown in a perspective view and a cross-sectional view of Fig. 4, and a pair of projections 61a, 61b are formed at the right end portion thereof. The interval between the front ends of the projections 61a and 61b is the same as the interval between the bottoms of the recesses of the second notches 42 to 49 of the multi-point tool 30. Further, at a central portion of the blade distal end fixing pin 60, an inclined through hole 62 having a certain inclination angle with respect to a central axis of the cylinder is formed.

Further, the inclined through hole 62 of the blade distal end fixing pin 60 is inserted into the lock pin 63 shown in Fig. 5. The lock pin 63 has a structure in which members of the pair of tapered portions 64a and 64b are joined, and cylindrical portions 65 and 66 protrude from the outside. The tapered portions 64a and 64b are inserted into the through holes 62 of the blade distal end fixing pins 60 described above. Further, as shown in FIG. 3A, a spring 67 is provided on the outer circumference of the cylindrical portion 65 of one of the lock pins 63, and the lock pin 63 is biased to the left side of FIG. 3A. The lock pin 63 causes the blade distal end fixing pin 60 to move upward by pressing the cylindrical portion 66 to the right when the multi-point tool 30 is rotated, thereby releasing the lock.

When the cusp is changed, the slider 68 can be used in order to rotate the multi-point tool 30 by a predetermined angle. As shown in FIGS. 3A and 3B, the slider 68 is formed by forming elongated portions 68a to 68c at three intervals in the elongated rectangular member. The distance between the front ends of the projections 68a, 68b, and 68c is the same as the interval between the bottoms of the recesses of the second notches 42 to 49 of the multi-point tool 30. As shown in Fig. 7(b), the slider 68 abuts the second notch of the multi-point tool 30 and slides it relative to each other. Further, the multi-point tool 30 can be rotated by a predetermined angle by the state in which the projections 68a and 68b are fitted into the notch and moved to the right side in the drawing to the state in which the projections 68b and 68c are fitted. The slider 68 can be disposed in a scoring device different from the scoring head, or can be embedded in the scoring head.

Then, for one of the holding mechanisms of the slider built in the case of the scribing head, Line description. As shown in FIG. 6A, a linear drive unit 26 that drives the slider holding portion in the vertical direction is provided adjacent to the pressure applying portion 24 and the multi-point tool holding portion 25. The linear drive unit 26 drives the slider holding unit 27 in the vertical direction. The slider holding portion 27 is provided with a linear driving portion 28 for driving the slider 68 in the horizontal direction, and the above-described slider 68 is attached to the tip end thereof.

The case where the multipoint tool 30 of the present embodiment is used for scribing will be described with reference to Figs. 7 and 8 . In addition, in FIGS. 7 and 8, the notch of the circumferential portion is exaggeratedly enlarged. When the scribing is performed, as shown in FIG. 7, one of the first notches of the multi-point tool 30, for example, the end of the notch 34 is used as a sharp point, and the projections 61a, 61b and the second notch of the blade distal fixing pin 60 are provided. 45, 46 snap and lock. In this manner, the multi-point tool 30 is fixed in a non-rotating state, and is relatively moved in the direction of the arrow A shown in the figure with respect to the substrate 17 to perform scribing. At this time, since the multi-point tool 30 is not scrolled, it is possible to perform scribing with the same sharp point.

Further, in a case where the sharp point in contact with the substrate 17 has deteriorated due to abrasion, the sharp point is changed by rotating the multi-point tool.

When the scribing head 22 itself is moved upward in order to rotate the multi-point tool 30, the multi-point tool 30 and the substrate 17 do not contact each other. Then, as shown in FIG. 6A(b), the slider holding portion 27 is moved downward by the linear drive portion 26. Next, as shown in FIG. 6B(a), the slider 68 is driven in the right direction by the linear drive unit 28, and the slider holding portion 27 is slightly raised by the linear drive unit 26. Accordingly, as shown in FIGS. 6B(b) and 7(b), the projections 68a and 68b of the slider 68 are fitted to the V-shaped notches 42, 49.

Then, the lock pin 63 is biased in the direction of the arrow B of FIG. 3A by a cylinder or the like (not shown) against the spring 67. Accordingly, as shown in FIG. 3B, the position at which the inner wall of the through hole 62 is in contact with the tapered portions 64a, 64b of the lock pin 63 is changed, so that the blade front end fixing pin 60 is upward. Shift. Therefore, the lock of the multi-point tool 30 by the lock pin 63 can be released.

Then, the slider 68 is moved to the right side in the drawing by the linear driving portion 28, whereby the multi-point tool 30 is rotated by 45° as shown in Fig. 8(a). Accordingly, the notches 42 and 43 are fixed to the projections 68b and 68c of the pin end of the notch 42 and 43, and the notch 35 of the multi-point tool 30 is brought into contact with the substrate 17.

Then, the lock pin 63 is biased in the direction of the arrow C by a cylinder (not shown). Accordingly, the position at which the inner wall of the through hole 62 is in contact with the tapered portions 64a and 64b of the lock pin 63 is changed, and the blade distal end fixing pin 60 is displaced downward to provide the blade tip as shown in Fig. 8(b). The projections 61a and 61b of the fixing pin 60 are engaged with the notches 46 and 47. According to this, the multi-point tool 30 is locked again. Then, while the lock is maintained by the spring 67, the end portion of the notch 35 is brought into contact with the substrate 17 as a sharp point, and the scribe is similarly performed. By repeating this operation, even if the sharp point is deteriorated by abrasion, it is possible to easily switch to a new sharp point in accordance with the number of times of the number of notches formed around the disk to perform the scribing.

Next, a second embodiment of the present invention will be described. In this embodiment, only the blade distal end fixing pin 80 is different, and the other configuration is the same as that of the first embodiment. 9A and 9B show this embodiment, and only the blade distal end fixing pin 80 is shown in a cross-sectional view. The blade distal end fixing pin 80 is provided with a through hole 81 having a crank-like cross section by a pair of holes 81a and 81b which are slightly shifted from the center instead of the through hole 62 which is inclined from the vertical direction of the shaft.

Also in this case, when the tip end of the blade is rotated, the cylindrical portion 66 of the lock pin 63 is pressed in the arrow direction B. As a result, as shown in FIG. 9B, the lock pin 63 can be moved to the right side against the spring 67, and the blade distal end fixing pin 80 can be moved upward. Thereby, the locking of the multi-point tool 30 is released, and the rotation is freely rotatable. The slider 68 is then rotated by a predetermined angle by sliding it. Then, the front end of the blade is fixed by pressing the lock pin 63 in the left direction of the arrow C. The pin 80 moves downward. Thereby, the multi-point tool 30 can be locked. If this action is repeated, even if the sharp point is deteriorated due to wear, it is possible to easily switch to a new sharp point to perform the scoring depending on the number of notches formed in the multi-point tool. Further, even if the tool is rotated, since the angle at which the ridge line of the tip end of the lower blade contacts the substrate is not changed before the tool, the contact angle of the cusp with respect to the substrate can be easily adjusted. In particular, when the first notches are provided at equal intervals, the position and angle of the new sharp points can be easily set only by rotating the tool.

Further, in the above-described embodiment, eight first notches and second notches are formed around the circumference of the multi-point tool, but of course, a plurality of notches may be further formed. Further, the shape of the second notch is not limited to a V shape, and may be other shapes such as a U shape. Further, the second notch must be formed at equal intervals. Further, it is preferable that the first notch is equally spaced so as to be in contact with the substrate at the same position when positioning by the second notch.

Further, in each of the above embodiments, the positioning device of the multi-point tool is provided on the scribing head, but the positioning device may be provided in the scribing device itself. In the case where the slider is provided on the scoring device itself, it is preferably disposed near the end of the platform or the standby position of the scribing head. In the case where the slider is disposed on the scoring device itself, as long as the cusp is changed, the scribe head is relatively moved horizontally to the position of the slider 68, further causing the scribe head or slider 68 to be relatively vertical The direction is moved until it abuts against the slider 68. The operation of changing the cusp is the same as that of the first embodiment, and the description thereof will be omitted.

Further, in each of the above-described embodiments, the slider is formed as the protrusions 68a to 68c which are formed at equal intervals in three places in the elongated rectangular member, but only one of the multi-point tools can be used. The manner in which the second notch of the portion abuts may have at least one protrusion. In this case, the moving distance of the slider, that is, the amount of rotation of the multi-point tool may be set in advance. Further, the slider is not limited to the rectangular member, and may be a cylinder having any protrusion that can abut against the notch of the multi-point tool or an arbitrary shape.

Further, in each of the above-described embodiments, the through hole is formed in the blade distal end fixing pin, but the groove portion into which the lock pin is inserted may be used. Further, the blade distal end fixing pin may be a cylindrical body, but may be a corner post, and the locking pin may have any shape such as a corner post or a combined pyramid shape as long as it has a tapered shape.

The multi-point tool of the present invention can be used in a scoring device for scribing a substrate of a brittle material, and is particularly useful for scoring objects with a large amount of wear.

24‧‧‧ Pressure Giving Department

30‧‧‧Multi-point tools

60‧‧‧blade front end fixing pin

62‧‧‧through holes

63‧‧‧Lock pin

65, 66‧‧‧ cylindrical

67‧‧‧ Spring

68‧‧‧Sliding parts

68a, 68b, 68c‧‧‧ protrusions

Claims (8)

A positioning mechanism for a multi-point tool is a positioning of a multi-point tool that is rotatably mounted on a scribing head, wherein the multi-point tool has a plurality of first notches formed on a periphery of a base of the rotationally symmetric body a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin and has a gap with the second notch of the multi-point tool at one end An equal pair of protrusions having a through hole at the center inclined with respect to the other axis perpendicular to the axis; and a lock pin inserted into the through hole of the front end of the blade fixing pin, perpendicular to the axis of the pin fixing the front end of the blade The multi-point tool is locked and unlocked by sliding the blade and fixing the pin at the tip end. A positioning mechanism for a multi-point tool is a positioning of a multi-point tool that is rotatably mounted on a scribing head, wherein the multi-point tool has a plurality of first notches formed on a periphery of a base of the rotationally symmetric body a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin and has a gap with the second notch of the multi-point tool at one end a pair of equal protrusions having a through-hole formed in a crank shape perpendicularly to the shaft at the center; and a lock pin inserted into the through hole of the pin at the tip end of the blade, sliding perpendicularly to the axis of the tip fixing pin of the blade The multi-point tool is locked and unlocked by the blade front end fixing pin. The positioning mechanism of the multi-point tool of the first or second aspect of the patent application, wherein the locking pin is formed by the tapered tapered portions of the front end being mutually opposed to each other, and the tapered portion is inserted into the front end of the blade to fix the pin Through hole. The positioning mechanism of the multi-point tool of claim 1 or 2 further has a slider for rotating the multi-point tool at a predetermined angle. A multi-point tool is rotatably mounted on a scribe head, wherein the multi-point tool has a plurality of first notches formed on an outer circumference of a base of the rotationally symmetric body, and is equally spaced between the first notches A plurality of second notches deeper than the first notch are formed in the ground, and the pin is restrained from rotating at the tip end of the second notch abutting blade at the time of scribing. A scribing head having a multi-point tool mounted in a rotatable manner and a positioning mechanism of the multi-point tool, wherein the multi-point tool has a plurality of first notches formed on an outer circumference of a base of the rotationally symmetric body. A plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes a blade distal fixing pin having an interval equal to the second notch of the multi-point tool at one end a pair of protrusions having a through hole at the center inclined with respect to the other axis perpendicular to the axis; and a lock pin inserted into the through hole of the front end of the blade fixing pin, perpendicular to the axis of the front end fixing pin of the blade The multi-point tool is locked and unlocked by sliding and fixing the pin at the front end of the blade. For example, the scribe head of claim 6 is provided with a slider for rotating the multi-point tool at a predetermined angle. A scoring device, comprising: a scribing head, a multi-point tool rotatably mounted on the scribing head, and a positioning mechanism of the multi-point tool, wherein the multi-point tool is outside the base of the rotationally symmetric body a plurality of first notches are formed, and a plurality of second notches deeper than the first notch are formed at equal intervals between the first notches; and the positioning mechanism includes: The blade distal end fixing pin has a pair of protrusions at one end equal to the distance between the second notches of the multi-point tool, and has a through hole at the center inclined with respect to the other axis perpendicular to the axis; the lock pin is inserted into the blade a through hole of the front end fixing pin, which slides perpendicularly to an axis of the front end fixing pin of the blade and locks and unlocks the multi-point tool by fixing the pin at the front end of the blade; and a slider for the multi-point tool Rotate the given angle.