JP2017209342A - New razor blade for cutter, and cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new razor blade for a cutter capable of reducing contact with the new razor blade in a clearing work of the new razor blade; and to provide a cutter including the new razor blade.SOLUTION: A new razor blade 20 for a cutter includes a tray 60 having an engagement part (sliding projection 631), and a blade body 70 stored movably forward/backward in the tray 60, and having a part to be engaged (holding hole 73) with which the engagement part is engaged. The engagement part is detachably engaged with the part to be engaged. Further, the cutter 10 includes a body case 30 for storing detachably the new razor blade 20 for the cutter, and is formed with the blade body 70 in the retractable state.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a replacement blade for a cutter and a cutter.

  Conventionally, a cutter capable of replacing a replaceable blade has been proposed. For example, the cutter knife disclosed in Patent Document 1 has a slider that is movably provided in the case while holding the cutter blade. The slider includes a slider main body and a pressing member provided so as to sandwich a cutter blade between the slider main body. Further, the cutter blade can be removed by performing a predetermined operation. Since the cutter knife of Patent Document 1 requires a predetermined operation of the slider when removing the cutter blade, the cutter blade is not prepared even when the slider and the cutter blade are taken out of the case. It is assumed that there will be no inconvenience of dropping off.

JP 2008-229077 A

  However, although the above-mentioned cutter knife has a slider that covers a part of the blade body and can replace the replacement blade, most of the blade body is exposed until it is stored in the cutter body. The user may touch the blade during the replacement work.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a replacement blade for a cutter in which contact with the blade of the replacement blade is reduced during replacement work of the replacement blade and a cutter including the replacement blade. And

  The replaceable blade for a cutter of the present invention includes a tray having an engaging portion, and a blade body having an engaged portion that is housed in the tray so as to be movable back and forth and is engaged with the engaging portion. The engaging portion is detachably engaged with the engaged portion.

  The cutter according to the present invention includes a main body case for detachably storing the replacement blade for the cutter described above, and is formed so that the blade body can be projected and retracted.

  ADVANTAGE OF THE INVENTION According to this invention, the replacement blade for cutters and the cutter provided with this replacement blade by which touching the blade of a replacement blade was reduced in the replacement work of a replacement blade can be provided.

It is the perspective view seen from the left front upper part of the cutter which concerns on embodiment of this invention, (a) shows the accommodation state, (b) shows the use condition. It is the disassembled perspective view seen from the front left upper part of the cutter which concerns on embodiment of this invention. It is the disassembled perspective view seen from the lower right back of the cutter which concerns on embodiment of this invention. It is IV-IV sectional drawing of the cutter of FIG. 1 which concerns on embodiment of this invention, (a) shows a lock release state, (b) shows a lock state. It is VV sectional drawing of the cutter of FIG. 1 which concerns on embodiment of this invention, (a) shows an accommodation state, (b) shows a use condition. It is VI-VI sectional drawing of the cutter of FIG. 5 which concerns on embodiment of this invention, (a) shows an accommodation state, (b) shows a use condition. It is VII-VII sectional drawing which expanded the operation part periphery of the cutter of FIG. 5 which concerns on embodiment of this invention. It is sectional drawing in the middle of changing to the use condition of FIG.6 (b) from the accommodation state of Fig.6 (a) of the cutter which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the cutter 10 as viewed from the upper left front. (A) of this figure shows a storage state, (b) shows a use state. In the cutter 10, a cutter replacement blade 20 (see FIGS. 2 and 3) having a blade body 70 is accommodated in the main body case 30. The user can cause the blade body 70 to appear and retract from the blade body intrusion hole 31 provided at the front end of the main body case 30 by operating the operation member 80 back and forth. In the following description, the blade body retracting hole 31 side of the cutter 10 is the front, and the opposite side is the rear. Further, the upper side in FIG. 1 is the upper side, the lower side is the lower side, and the left side when viewing the front from the rear is the left, and the right side is the right.

  FIG. 2 is an exploded perspective view of the cutter 10 as viewed from the upper left front. FIG. 3 is an exploded perspective view of the cutter 10 as viewed from the lower right rear side.

  The cutter 10 includes a main body case 30 that houses the replaceable blade 20 and the slider 50, and an end cap 40. The replaceable blade 20 includes a tray 60 and a blade body 70. An operation member 80 is attached to the upper part of the slider 50. In addition, the cutter 10 includes a lock member 90 that regulates attachment / detachment of the end cap 40 and movement of the slider 50. Hereinafter, each member will be described.

  The main body case 30 is formed in a substantially quadrangular prism shape having a long axis in the front-rear direction, and the front end portion of the front end surface 30c is formed to be narrowed. The left and right widths of the left side surface 30a and the right side surface 30b (see FIG. 3) of the main body case 30 are formed so as to expand slightly toward the rear. On the upper surface on the front end side of the main body case 30, an operation recess 301 having a long axis in the front and rear and recessed in an elliptical shape is formed. In addition, a gripping surface 302 that is recessed from the outer surface along the outer surface of the main body case 30 is formed on the lower surface of the main body case 30. The front end face 30c of the main body case 30 is formed with a blade body retracting hole 31 having a width and a length through which the blade body 70 can be inserted in a slit shape extending in the vertical direction. In addition, as shown in the enlarged view A when the rear opening 34 of the main body case 30 is viewed from the rear, two arc-shaped protrusions 311 are formed on the inner wall on the right side of the blade body intrusion hole 31 in the vertical position.

  On the upper surface of the main body case 30, a concave long rectangular groove 303 is formed from the rear end of the main body case 30 toward the front. At the bottom of the long rectangular groove 303, a slit 32 is formed by cutting out from the rear end of the main body case 30 toward the front. Through the slit 32, the outside of the main body case 30 and the inside 33 in which the replaceable blade 20 is accommodated are penetrated. A plurality of notches 321 are formed on the right edge of the slit 32 across the front and rear. Each notch 321 is notched to the left and right, and is formed in a substantially V shape in plan view as viewed from above.

  A rear opening 34 for accommodating the replaceable blade 20 and the slider 50 from the rear is formed at the rear end of the main body case 30. The rear opening 34 is opened by cutting the upper rear side into an L shape in a side view. In the rear opening 34, a bottom surface 30f of the main body case 30 and a U-shaped opening receiving portion 35 extending rearward from the left side surface 30a and the right side surface 30b are formed. Two guide grooves 351a are formed on the outside of the left side surface 35a of the opening receiving portion 35 shown in FIG. The two guide grooves 351a are arranged side by side in the vertical direction. A locking recess 352 that is deeper than the guide groove 351a is formed on the front side of each guide groove 351a.

  As shown in FIG. 3, two guide grooves 351b and 351c are formed on the outer side of the right side surface 35b of the opening receiving portion 35. The upper guide groove 351b and the lower guide groove 351c are arranged in parallel vertically. A locking recess 352 that is deeper than the guide grooves 351b and 351c is formed on the front side of each guide groove 351b and 351c. A rectangular locking hole 353 that penetrates the right side surface 35b of the opening receiving portion 35 inward and outward is formed on the rear side of the lower guide groove 351c. Further, the opening receiving portion 35 is formed with a rectangular cutout portion 354 at the rear end of the guide groove 351c.

  In the enlarged view A of FIG. 2, a substantially rectangular space having a front bottom portion 333 is formed in the inside 33 of the main body case 30. An intermediate plate 334 is erected from the right inner wall 33b of the interior 33 toward the left. The intermediate plate 334 extends from the front bottom portion 333 where the blade body retracting hole 31 is formed to the vicinity of the rear opening 34.

  On the inner wall on the lower side of the inner portion 33, a concave lower groove portion 36f that is shallowly recessed from the front bottom portion 333 to the vicinity of the rear opening 34 is formed. A concave frame portion 36e that opens to the left is formed between the middle plate 334 and the lower groove portion 36f, and a concave groove portion 36e1 having a narrower vertical width than the concave frame portion 36e is formed on the right inner surface of the concave frame portion 36e. It is formed. The concave frame portion 36e is formed wider in the vertical width than the blade body retracting hole 31, and extends in the front-rear direction from the front bottom portion 333 to the vicinity of the rear opening portion 34. The tray storage portion 36 is formed by the concave frame portion 36e and the concave groove portion 36e1. Further, a slider left storage portion 37 is formed between the left inner wall 33a of the interior 33 and the left end surface 334a of the intermediate plate 334. Further, a slider upper storage portion 38 is formed between the upper inner wall 33 e in which the slit 32 of the inner 33 is formed and the upper surface of the intermediate plate 334. A concave frame portion 355 and a guide projection 356 are formed in the front-rear direction on the bottom 35 f of the opening receiving portion 35 behind the intermediate plate 334. The guide projection 356 is provided at a substantially center in the left-right direction of the bottom portion 35f, and extends from the inclined surface connecting the lower groove portion 36f to the bottom portion 35f to the rear end of the opening receiving portion 35. The concave frame portion 355 is provided on the right side of the guide protrusion 356.

  The end cap 40 functions as a lid by being detachably attached to the opening receiving portion 35 from the rear end of the main body case 30 housing the replaceable blade 20 and the slider 50. The end cap 40 is formed to have a lateral width narrower than that of the main body case 30 (see FIG. 6). The end cap 40 has a front opening 41 on the front side. On the rear side of the end cap 40, an elliptical through hole 42 penetrating left and right is formed. Further, the rear end surface 40d of the end cap 40 is formed in an elliptical arc shape along the inner peripheral shape of the through hole 42 so that the thickness formed between the end cap 40 and the through hole 42 is substantially the same in a side view. (See FIG. 5). Two through-holes 422 that penetrate to the rear end face 40d side are arranged on the inner wall 421 of the through-hole 42 in the vertical direction.

  On the inner wall of the front opening 41, convex guide rails 43a and 43b extending in the front-rear direction are formed on the right guide surface 41b and the left guide surface 41a, respectively. Two guide rails 43a are arranged side by side, and two guide rails 43b are arranged side by side. On the right guide surface 41b, on the front side of the guide rail 43b, a convex arcuate engagement protrusion 431 that engages with the engagement recess 352 of the right guide grooves 351b and 351c of the opening receiving portion 35 is formed. Is done. Similarly, on the left guide surface 41a, on the front side of the guide rail 43a, a convex arc-shaped engagement protrusion (not shown) that engages with the engagement recess 352 of the left guide groove 351a of the opening receiving portion 35. Is formed. Accordingly, the right end guide rail 43b is guided by the guide grooves 351b and 351c and the left end guide rail 43a is guided by the guide groove 351a, so that the end cap 40 is attached to the main body case 30 from the rear.

  When the end cap 40 is completely attached to the main body case 30, the engaging protrusion 431 engages with the locking recess 352. Therefore, a click feeling with the end cap 40 attached is obtained, and the unintentional dropping of the end cap 40 is prevented.

  On the upper surface of the end cap 40, a countersink portion 44 that is recessed in a rectangular shape to which the lock member 90 is attached is formed. The counterbore 44 has mounting holes 441 at the corners of the four corners at the bottom, and has a lock pin insertion hole 442 having a slightly larger opening area than the mounting hole 441 at the center. The mounting hole 441 and the lock pin insertion hole 442 are formed as a substantially rectangular long hole extending in the left-right direction of the end cap 40. Engagement protrusions 443 are formed at the front and rear sides of the lock pin insertion hole 442 at substantially the center in the left-right direction at the bottom of the counterbore 44.

  Next, the replaceable blade 20 will be described. The replaceable blade 20 includes a tray 60 and a blade body 70. The blade body 70 included in the replaceable blade 20 is held by the tray 60 from the right side of the blade body 70 and is connected to the slider 50 from the left side of the blade body 70.

  The tray 60 has a substantially rectangular bottom plate 61 having long sides on the front and rear sides. From the upper edge and the lower edge of the bottom plate 61, an upper side wall 61e and a lower side wall 61f are erected on the left side from the rear end side to the front end side of the bottom plate 61, respectively. The height in the left-right direction of the upper side wall 61e and the lower side wall 61f is formed higher than the thickness of the blade body 70. Two upper presser walls 61e1 and 61e2 refracted downward are formed from the tip of the upper wall 61e. Two lower presser walls 61f1 and 61f2 refracted upward are formed from the tip of the lower wall 61f. Each presser wall 61e1, 61e2, 61f1, 61f2 is arranged in the order of the upper presser wall 61e1, the lower presser wall 61f1, the upper presser wall 61e2, and the lower presser wall 61f2 from the front to the rear. In this way, the bottom plate 61, the upper side wall 61e, and the lower side wall 61f form a long groove portion in the front and rear direction. In the left-right direction, the blade body 70 placed in the groove is restricted to move left and right by being sandwiched between the upper retaining walls 61e1 and 61e2 and the lower retaining walls 61f1 and 61f2 on the one side and the bottom plate 61 on the other side. The Therefore, the blade body 70 is guided to freely move back and forth while being loosely fitted in the vertical and horizontal directions, and is prevented from falling off the tray 60.

  Further, a long plate-like guide plate 611 is extended from the left end portion of the upper side wall 61e. The guide plate 611 extends from the slightly rear side to the front end in the front-rear direction. The guide plate 611 is connected to the upper side wall 61e so that the lower surface is substantially flush with the lower surface of the upper side wall 61e, and the upper surface is lowered downward so as to form a step with the upper surface of the upper side wall 61e.

  The bottom plate 61 has a long rectangular recess 62 that is recessed on the side opposite to the placement side of the blade body 70 (on the right side of the tray 60). The long rectangular recess 62 is formed in a straight line from the vicinity of the center in the front-rear direction to the front end, and is provided at the approximate center of the bottom plate 61 in the vertical direction. A circular through hole 621 is formed behind the long rectangular recess 62. Further, the bottom plate 61 has an upper window hole 64e and a lower window hole 64f, which are through holes, at an upper position and a lower position of the long rectangular recess 62 (see also FIG. 3). The upper window hole 64e is located on the right side of the upper presser walls 61e1 and 61e2. The lower window hole 64f is located on the right side of the lower pressing walls 61f1 and 61f2. The upper window hole 64e and the lower window hole 64f are formed as a substantially rectangular long hole extending in the front-rear direction.

  The bottom plate 61 has a long hole 612 extending forward and backward on the rear end side. A cantilever spring-like sliding plate 63 is formed inside the long hole 612. The rear end side of the sliding plate 63 is a fixed end 63d connected to the bottom plate 61, and the front end 63c of the sliding plate 63 is a free end. The sliding plate 63 has a sliding protrusion (engagement portion) 631 standing on the left side of the tip 63c. The sliding protrusion 631 is formed in a columnar shape having a long and long bottom. The front end and the rear end of the sliding protrusion 631 are formed in a chamfered shape. Further, the sliding plate 63 has an operation protrusion 632 protruding leftward between the fixed end 63d and the tip 63c. As shown in the cross-sectional view of FIG. 6A, the operation protrusion 632 is formed in a substantially pentagonal shape with the bottom side on the sliding plate 63 side when viewed from above.

  A front projection 633c and a rear projection 633d having a substantially trapezoidal shape in a side view are formed above the fixed plate 63d side of the sliding plate 63 (see FIG. 5B). The front side surface of the front projection 633c and the rear side surface of the rear projection 633d are formed in the vertical direction. Further, the rear side surface of the front projection 633c is inclined so as to be lowered rearward, and the front side surface of the rear projection 633d is formed so as to be inclined rearward.

  The bottom plate 61 includes an upper locking portion 651 and a lower locking portion 652 on the rear side of the upper pressing wall 61e1 and the rear side of the lower pressing wall 61f1, respectively. The upper locking portion 651 is formed in a substantially trapezoidal shape in a side view when the upper bottom portion is connected to the upper side wall 61e and extends downward (see FIG. 5A). The lower locking portion 652 is formed in a substantially trapezoidal shape in a side view in which the lower bottom portion is connected to the lower side wall 61f and stands upward. Each of the front end surface of the upper locking portion 651 and the front end surface of the lower locking portion 652 is provided on substantially the same plane, and when the blade body 70 is stored in the tray 60, the rear end slope of the blade body 70 is inclined. The blade body 70 is prevented from moving backward by contacting the surface 70d.

  On the rear side of the upper side wall 61e, a locking portion 66 curved in a concave arc shape downward is formed. The locking portion 66 is formed in a double-supported spring plate shape that can be elastically deformed up and down with the front end and the rear end as fixed ends. An upper locking projection 661 is erected at the approximate center of the lower surface of the locking portion 66 in the front-rear direction. In FIG. 3, the upper locking projection 661 is wider than the locking portion 66 and extends to the right side of the locking portion 66. In addition, plate-like flange portions 661c and 661d are formed on the front and rear sides of the base end side of the upper locking projection 661. The flange portions 661c and 661d are provided at the right position of the upper locking projection 661. In FIG. 2, a support protrusion 662 is erected upward at a position facing the upper locking protrusion 661 of the lower side wall 61f. The tips of the upper locking projection 661 and the support projection 662 are formed in a semicircular shape when viewed from the side.

  In FIG. 3, a notch 663 is formed in the bottom plate 61 between the locking portion 66 and the sliding plate 63 on the rear end side of the long hole 612. A protruding surface 613 is formed on the right side surface of the bottom plate 61. The protruding surface 613 is formed at the upper and lower approximate centers, and extends from the front end of the tray 60 to the substantially rear end. At the front end portion and the rear end portion of the notch 663, projections 664 c and 664 d are formed from a part of the projecting surface 613 toward the upper locking projection 661. A rib portion 635 is formed on the right side surface side of the sliding plate 63. The rib portion 635 extends from the fixed end 63 d of the sliding plate 63 to the approximate center in the front-rear direction of the sliding plate 63. A part of the fixed end 63 d of the rib portion 635 is formed to have a narrow vertical width adjacent to the edge of the notch 634.

  In FIG. 2, the sliding plate 63 is formed with a notch 634 that is notched in a substantially rectangular shape at the lower end on the fixed end 63d side. On the left side of the notch 634, a substantially quadrangular prism-like engagement protrusion 671 extending from the bottom plate 61 is provided. A return protrusion 671e standing upward is formed at the tip of the engagement protrusion 671. A rear presser plate 672 extending from the bottom plate 61 is formed on the left side of the slider 50 below the engagement protrusion 671. When the groove portion 533 of the slider 50 is engaged with the engagement protrusion 671, the leftward movement of the slider 50 is restricted. Further, the rearward movement of the slider 50 with respect to the tray 60 is restricted by the engagement protrusion 671 and the rear pressing plate 672. A contact protrusion 673 that contacts the upper surface of the guide protrusion 356 of the opening receiving portion 35 is formed on the front side of the rear pressing plate 672 at the lower end of the lower side wall 61f. The contact protrusion 673 is formed in a substantially semicircular arc shape when viewed from the side.

  The tray 60 has a tray locking portion 68 behind the bottom plate 61. The tray locking portion 68 is formed in a plate shape whose vertical width is narrower than that of the bottom plate 61. A groove 681 that is recessed in a V shape in plan view is formed on the left side surface of the tray locking portion 68. A square columnar protrusion 682 is formed on the rear inner surface of the groove 681 so as to stand to the left. In FIG. 3, a locking protrusion 683 is formed on the right side surface of the rear end of the tray locking portion 68. When the tray 60 is stored in the inside 33 of the main body case 30, the locking protrusion 683 is locked in the locking hole 353 of the main body case 30 and fixes the position of the tray 60. Further, an operation plate 684 is provided at the rear end of the tray locking portion 68 to release the locking of the locking protrusion 683 to the locking hole 353 by elastically deforming the tray locking portion 68 in the left direction. It is done.

  The blade body 70 is formed in a parallelogram-like plate shape. The blade body 70 has a blade edge 71 on one of the long sides. The blade edge 71 is formed as a double blade on both surfaces of the blade body 70. The blade body 70 is stored in the tray 60 so that the blade edge 71 is on the lower side and the acute angle vertex of the blade body 70 including the blade edge 71 is on the front. The blade body 70 has a delivery hole 72 and a holding hole (engaged portion) 73 on the rear end side. The delivery hole 72 is a round hole formed substantially at the center in the vertical direction of the blade body 70. In addition, the holding hole 73 is formed in a long hole shape at a position behind the delivery hole 72 at a substantially center in the vertical direction of the blade body 70. The long axis of the hole shape of the holding hole 73 is formed to be in the front-rear direction of the blade body 70. The blade body 70 is sandwiched between the upper side wall 61e and the lower side wall 61f in the vertical direction, and the left and right direction is sandwiched between the bottom plate 61 and the upper pressing walls 61e1 and 61e2 and the lower pressing walls 61f1 and 61f2. It is stored freely. A sliding protrusion 631 is inserted into the holding hole 73. The blade body 70 is restricted from moving in the front-rear direction while the sliding protrusion 631 is inserted into the holding hole 73.

  The slider 50 is used in combination with the tray 60, the blade body 70, and the operation member 80 to operate the forward / backward movement of the blade body 70. The slider 50 includes a slide plate 51 and an operation unit 52.

  The slide plate 51 is connected to the blade body 70 while sandwiching the blade body 70 with the tray 60. A fixed plate 53 is extended on the rear side of the slide plate 51. The vertical width of the fixed plate 53 is narrower than the vertical width of the slide plate 51. A locking hole 531 for fixing the slider 50 is formed at the rear end of the fixing plate 53. The fixing plate 53 has a substantially rectangular cutout 532 having a width in the front-rear direction wider than the columnar protrusion 682 below the lock hole 531. On the left side surface of the slide plate 51, four guide rails 54 are formed that are arranged in two upper and lower stages and divided into front and rear. The guide rail 54 is a linear protrusion protruding from the slide plate 51 and is formed in the front-rear direction of the slider 50. As shown in FIG. 3, a groove portion 533 that is substantially L-shaped when viewed from the back is formed at the lower end of the fixed plate 53. The groove portion 533 is provided so that the inner wall faces downward and to the left, and engages with the return protrusion 671e of the tray 60.

  On the right side of the slide plate 51, a guide groove 55 arranged in the front-rear direction is formed. The guide groove 55 engages with the guide plate 611. The guide groove 55 is formed between two long plate-like rails. The guide groove 55 is provided from the front end portion of the slider 50 to the fixed plate 53 provided with the lock hole 531. A pressing portion 561 is formed substantially at the center of the right side surface of the slide plate 51. The pressing portion 561 is formed in a substantially rectangular parallelepiped shape having a long axis at the front and rear. The pressing part 561 has a front inclined part 561c and a rear inclined part 561d. In addition, a concave portion that is long in the front-rear direction is formed in the approximate center of the right side surface of the pressing portion 561. A plate portion 561e extends rearward at the rear end of the pressing portion 561 and at the upper end of the rear inclined portion 561d. A lower locking projection 562 is formed on the upper surface of the pressing portion 561 including the plate portion 561e. The lower locking projection 562 is formed in a substantially semicircular arc shape when viewed from the right side.

  On the front side of the pressing portion 561 of the slide plate 51, a substantially cylindrical engagement protrusion 563 that is engaged with the feed hole 72 of the blade body 70 is provided upright. The engagement protrusion 563 has a groove portion 563a that divides the whole in the front-rear direction. On the rear side adjacent to the engagement protrusion 563, a mounting table 564 for the blade body 70 standing in a substantially quadrangular prism shape is formed. In addition, a groove is formed at the approximate center in the vertical direction at the boundary between the mounting table 564 and the engaging protrusion 563. An engaging projection 563 is inserted into the delivery hole 72 of the blade body 70. At this time, the left side surface of the blade body 70 comes into contact with the flat surface 564 a of the mounting table 564.

  Note that, on the right side surface of the slide plate 51, a lower step portion 51e and an upper step portion 51f having a thicker plate thickness to the right than the lower step portion 51e are formed. The lower step portion 51 e is provided above the slide plate 51, and the upper step portion 51 f is provided below the slide plate 51. The pressing portion 561 and the mounting table 564 are disposed at the positions of the upper step portion 51f and the lower step portion 51e. Further, the engagement protrusion 563 is disposed on the upper step portion 51f. The bottom of the groove 563a of the engaging protrusion 563 is formed on the same plane as the upper step 51f.

  In FIG. 2, the operation unit 52 extends over the slide plate 51. The operation unit 52 includes a substantially rectangular plate-shaped operation main body 57 and a substantially rectangular plate-shaped fixing plate 58 erected upward from the operation main body 57. The operation main body 57 is connected to the upper portion of the slide plate 51 so as to be substantially perpendicular to the slide plate 51. At the four corners of the upper surface of the operation main body 57, quadrangular columnar contact protrusions 571 are provided. The front end and the rear end on the upper surface side of the contact protrusion 571 are each formed in a C chamfer shape. In addition, on the upper surface of the contact protrusion 571, a stepped portion protruding upward is formed at a substantially center in the front-rear direction. A total of four engagement projections 572 each having a substantially arc shape are provided on the left side surface and the right side surface of the operation main body 57 at a position below each contact projection 571.

  The fixing plate 58 is adjacent to the right side of the two left contact protrusions 571a. A return protrusion 581 protruding leftward is formed above the front end and rear end of the fixing plate 58. The upper end of the return protrusion 581 is formed in a C chamfer shape. The fixed plate 58 is formed with a front branch plate 582 that bifurcates in the forward direction toward the right front (see also FIG. 7). In addition, a rear branch plate 583 is formed on the fixed plate 58 so as to branch in a bifurcated manner toward the rear right side. The front end portion of the front branch plate 582 and the rear end portion of the rear branch plate 583 are formed so as to be substantially parallel to the fixed plate 58 in a top view. Further, as shown in FIG. 3, a return protrusion 581 protruding rightward is formed above the front end portion of the front branch plate 582 and the front end portion of the rear branch plate 583. The upper ends of the return projections 581 of the front branch plate 582 and the rear branch plate 583 are formed in a chamfered shape.

  Two prismatic engagement protrusions 584c and 584d are formed on the right side surface of the fixing plate 58. The engaging protrusions 584c and 584d are provided between the front branch plate 582 and the rear branch plate 583. The front engaging protrusion 584c extends from the fixed plate 58 toward the right front, and the rear engaging protrusion 584d extends from the fixed plate 58 toward the right rear. Further, the front ends of the respective engagement protrusions 584c and 584d are provided so as to be located on the right side of the front branch plate 582 and the rear branch plate 583.

  The operation member 80 is fixed to the operation unit 52 from above. As shown in the enlarged view C of FIG. 3, the operation member 80 is formed in a substantially rectangular plate shape that is long in the front-rear direction. The operation member 80 includes a left side plate 81a and a right side plate 81b, and is formed in a frame shape having an opening at the bottom. Two inner locking projections 81a1 are provided on the inner wall of the left side plate 81a at substantially the same longitudinal position as the return projection 581. Also, two inner locking projections 81b1 are provided on the inner wall of the right side plate 81b at positions facing the inner locking projections 81a1 on the left and right. Each of the inner locking projections 81a1 is formed in a substantially straight body shape protruding inward of the operation member 80. C-chamfered shapes are formed at the lower ends of the inner locking projections 81a1 and 81b1.

  At the front end and the rear end of the top plate 82 of the operation member 80, a cubic front restriction member 821c and a rear restriction member 821d are formed from the lower surface. Between the front restricting member 821c and the rear restricting member 821d, a prismatic disengagement plate 83 having a substantially trapezoidal bottom is erected downward from the top plate 82. The engagement release plate 83 is disposed such that the right side surface is in contact with the inner surface of the right side plate 81b. The left sides of the front end portion and the rear end portion of the engagement release plate 83 are each formed as an inclined surface. A concave groove is formed at the boundary between the engagement release plate 83 and the right side plate 81b. As shown in FIG. 2, groove-shaped uneven portions are formed on the upper surface of the operation member 80 in the left-right direction. This uneven part serves as a slip stopper when the user slides the operation member 80 in the front-rear direction.

  The lock member 90 is formed in a substantially square flat plate shape. On the upper surface of the lock member 90, an operation knob 91 which is a linear protrusion long in the front-rear direction is formed. The operation knob 91 is used when the user moves the lock member 90 in the left-right direction. On the lower surface of the main body portion of the lock member 90, as shown in an enlarged view B of FIG. 3, guide pillars 92 are erected downward at the corners of the four corners. Each guide column 92 includes a return protrusion 921 that protrudes outward in the front-rear direction at the lower end portion thereof. The return protrusion 921 is formed to be gradually inclined so as to become thicker from the distal end side toward the proximal end side of the lock member 90. The inclined surface of the return projection 921 of the front guide column 92c is formed on the front side, and the inclined surface of the return projection 921 of the rear guide column 92d is formed on the rear side.

  Each guide column 92 is inserted corresponding to each mounting hole 441 provided in the counterbore 44. Further, the return protrusion 921 is provided at the exposed portion of the lower end that penetrates the mounting hole 441. Therefore, the return protrusion 921 can prevent the lock member 90 from coming out of the mounting hole 441 of the end cap 40.

  In the center of the lower surface of the main body portion of the lock member 90, a lock pin 93 is formed standing downward. The tip of the lock pin 93 is bent in an L shape toward the left side of the end cap 40. The lock pin 93 is inserted into a lock pin insertion hole 442 provided in the countersunk portion 44. Further, on the back side of the lock member 90, groove portions 94a and 94b extending in the front-rear direction are formed on the left and right sides, respectively. Each groove 94a, 94b is divided into a front side and a rear side across the lock pin 93. The left and right groove portions 94 a and 94 b engage with the engagement protrusion 443 of the end cap 40.

  Fig.4 (a) is IV-IV sectional drawing in the position of the lock member 90 of the cutter 10 of FIG. 1, and shows a lock release state. FIG.4 (b) shows the locked state of IV-IV sectional drawing. Since the guide pillar 92 and the lock pin 93 of the lock member 90 are respectively inserted into the mounting hole 441 and the lock pin insertion hole 442 formed in the shape of a long hole, the lock member 90 can be moved in the left-right direction of the cutter 10. it can. When the lock member 90 is slid to the right side of the figure (left side of the cutter 10), the tip of the L-shaped lock pin 93 provided on the lower surface of the lock member 90 is inserted into the lock hole 531 as shown in FIG. It is inserted. In the locked state in which the lock pin 93 is inserted through the lock hole 531, the movement of the slider 50 in the front-rear direction is restricted. Further, since the lock member 90 is attached to the end cap 40 in the locked state, the back-and-forth movement of the end cap 40 is also restricted. That is, by operating the lock member 90, the use of the cutter 10 can be restricted while the removal of the end cap 40 of the cutter 10 is restricted.

  When the lock member 90 is in the right position of the cutter 10 (the unlocked state in FIG. 4A), the left groove 94a provided on the back surface of the main body of the lock member 90 shown in FIGS. Then, the engagement protrusion 443 is engaged. Further, when the lock member 90 is at the left position of the cutter 10 (the locked state in FIG. 4B), the engagement protrusion 443 engages with the right groove portion 94b provided on the back surface of the lock member 90. Therefore, the lock member 90 is fixed in either the locked state or the unlocked state.

  Next, an operation from the storage state of the cutter 10 to the use state will be described. 5A and 5B are cross-sectional views taken along the line V-V of the cutter 10 in FIG. 1, in which FIG. 5A shows a stored state and FIG. 6 is a cross-sectional view taken along the line VI-VI of the cutter 10 of FIG. 5, in which (a) shows a stored state and (b) shows a used state. FIG. 7 is an enlarged VII-VII sectional view of the periphery of the operation unit 52 of the cutter 10 of FIG.

  In the housed state of FIG. 5A, the sliding protrusion 631 is inserted in the front side of the holding hole 73 as shown in FIG. The top of the operation protrusion 632 on the slider 50 side and the front and back surfaces inclined from the top toward the bottom plate 61 come into contact with the pressing portion 561 according to the position of the slider 50. In the stored state, the operation protrusion 632 is located in front of the front inclined portion 561c of the pressing portion 561. When the operation member 80 is pushed forward by the user, as shown in FIG. 7, the front end inclined portion 83c of the engagement release plate 83 provided on the operation member 80 moves the front engagement protrusion 584c to the left front direction (FIG. 7, and the engagement with the notch 321 is released. Therefore, the operation unit 52 can move forward. The rear engaging protrusion 584d bends to the left (downward in FIG. 7) as the operating portion 52 moves forward, and the engagement with the notch 321 is released.

  5A, when the slider 50 moves forward, the lower locking projection 562 pushes the upper locking projection 661 upward and elastically deforms the center of the locking portion 66 upward. Accordingly, since the slider 50 requires a predetermined force or more, the blade body 70 can be prevented from moving carelessly together with the slider 50.

  FIG. 8 is a cross-sectional view of the cutter 10 during the transition from the housed state of FIG. 6A to the used state of FIG. When the operation member 80 is pushed forward, the sliding protrusion 631 is inserted into the holding hole 73 that is a long hole with a predetermined play amount, so that the blade body 70 together with the slider 50 has a predetermined play amount. Move forward by that amount. As shown in FIG. 8, when the operation protrusion 632 rides on the front inclined portion 561 c and is positioned on the flat portion of the pressing portion 561, the sliding plate 63 bends to the right side of the tray 60 (upper side in FIG. 8). Therefore, the sliding protrusion 631 is detached from the holding hole 73, and the blade body 70 can further move forward. When the slider 50 is further moved forward, the pressing portion 561 moves to the front of the operation protrusion 632 and comes into contact with the sliding protrusion 631 that has moved to the slider 50 side by the elastic force. Therefore, the sliding protrusion 631 is positioned at the flat portion of the pressing portion 561, and the bending of the sliding plate 63 to the right is maintained. Thereafter, as shown in FIG. 6B, when the pressing portion 561 moves forward of the sliding projection 631, the deformation of the sliding plate 63 is restored by the elastic force, and the blade body 70 is moved from the blade body retracting hole 31. Exposed to the outside.

  When the forward operation of the slider 50 is finished and the user releases the operation of the operation member 80, the engagement protrusions 584c and 584d in FIG. 7 are engaged with one of the notches 321. Therefore, the back-and-forth movement of the slider 50 is restricted, and the protrusion of the blade body 70 can be fixed. The appearance of the cutter 10 shown in FIGS. 5B and 6B in use is shown in the perspective view of FIG.

  Further, when the slider 50 is moved backward, the engagement protrusions 584c and 584d shown in FIG. 7 operate in the same manner as when moved forward. That is, when the operation member 80 is pushed rearward by the user, the rear end inclined portion 83d of the engagement release plate 83 provided on the operation member 80 moves the rear engagement protrusion 584d to the left rear direction (right side in FIG. 7). Pushing down (downward) releases the engagement with the notch 321. Therefore, the operation unit 52 can move backward. The front engaging protrusion 584c bends to the left (downward in FIG. 7) as the operation portion 52 moves rearward, and the engagement with the notch 321 is released. As described above, the engagement release plate 83 can release the engagement of the engagement protrusions 584c and 584d with the cutout portion 321 in the moving direction of the slider 50 by operating the operation member 80 back and forth.

  As mentioned above, although embodiment of this invention was described, this invention is not limited by this embodiment, It can implement by adding a various change. In the description of the present embodiment, the slider 50 has a function of moving the blade body 70 forward and a function of removing the sliding protrusion 631 inserted into the blade body 70, each having an engagement protrusion 563 and a pressing portion 561. Although it implement | achieves by one member, it is good also as a structure which does not provide the press part 561. FIG. For example, the sliding protrusion 631 may be a protrusion on a convex arc inclined in the front-rear direction. Therefore, by pushing the operation member 80 forward with a predetermined force or more, the sliding projection 631 can ride on the rear edge of the holding hole 73 and release the holding of the blade body 70 and the tray 60.

  The replaceable blade 20 and the slider 50 can be configured as one assembly. In this case, the replacement blade that is replaced as a consumable part of the cutter 10 can include the tray 60, the blade body 70, and the slider 50. Therefore, the replacement work can be facilitated by omitting the operation of attaching the slider 50 when replacing the replacement blade.

  Further, the slider 50 and the blade body 70 can be fixed by providing the blade body 70 with two or more hole portions such as round holes and square holes. Alternatively, the slider 50 and the blade body 70 may be fixed by providing one or a plurality of notches in the blade body 70 and engaging the slider 50 with the notches.

  Further, the method of releasing the engagement between the holding hole 73 and the sliding protrusion 631 is not limited to the method in which the pressing portion 561 bends the sliding plate 63 by the forward movement of the slider 50. For example, another member interlocked with the operation of the operation member 80 may come into contact with the left side of the sliding plate 63 to bend the sliding plate 63. Alternatively, a release member independent of the slider 50 may be provided on the outer surface of the main body case 30, and the slide plate 63 may be bent by pressing the operation protrusion 632 or the like by a member or the like interlocked with a pressing operation or a slide operation of the release member. .

  Further, the holding hole 73 is not limited to the long hole shown in the present embodiment, and may be, for example, one or a plurality of round holes or square holes.

  In addition, as a method for attaching and detaching the sliding protrusion 631, another method may be used. For example, the main body case 30 can include a lock member for switching the holding state and the holding release state of the blade body 70 and the sliding protrusion 631 by a sliding operation or a pressing operation. Further, the sliding protrusion 631 may be configured to be biased by a coil spring or the like when being inserted into the holding hole 73.

  The cutting edge 71 formed on the blade body 70 may be a single blade.

DESCRIPTION OF SYMBOLS 10 Cutter 20 Spare blade 30 Main body case 30a Left side surface 30b Right side surface 30c Front end surface 30f Bottom surface 31 Blade body retracting hole 32 Slit 33 Interior 33a Left inner wall 33b Right inner wall 33e Upper inner wall 34 Back opening 35 Opening receiving part 35a Left side 35b Right side Surface 35f Bottom portion 36 Tray storage portion 36e Concave frame portion 36e1 Concave groove portion 36f Lower groove portion 37 Slider left storage portion 38 Slider upper storage portion 301 Operation concave portion 302 Holding surface 303 Long rectangular groove 311 Arc-shaped protrusion 321 Notch portion 333 Front bottom portion 334 Middle plate 334a Left end surface 351a-351c Guide groove 352 Locking recess 353 Locking hole 354 Notch 355 Concave frame 356 Guide projection 40 End cap 40d Rear end surface 41 Front opening 41a Guide surface 41b Guide surface 42 Through hole 43a Guide rail 43b Guide rail 4 Countersink portion 421 Inner wall portion 422 Through hole 431 Engagement protrusion 441 Mounting hole 442 Lock pin insertion hole 443 Engagement protrusion 50 Slider 51 Slide plate 51e Lower step portion 51f Upper step portion 52 Operation portion 53 Fixing plate 54 Guide rail 55 Guide groove 57 operation main body 58 fixing plate 531 lock hole 532 notch 533 groove 561 pressing portion 561c forward inclined portion 561d backward inclined portion 561e plate portion 562 lower locking protrusion 563 engaging protrusion 563a groove portion 564 mounting table 564a flat surface 571 (571a, 571b) Contact projection 572 Engagement projection 581 Return projection 582 Front branch plate 583 Rear branch plate 584c, 584d Engagement projection 60 Tray 61 Bottom plate 61e Upper side wall 61e1, 61e2 Upper presser wall 61f Lower side wall 61f1, 61f2 Lower presser wall 62 Long rectangular recess 63 Sliding plate 6 c Tip 63d Fixed end 64e Upper window hole 64f Lower window hole 66 Locking portion 68 Tray locking portion 611 Guide plate 612 Long hole 613 Projection surface 621 Through hole 631 Sliding projection 632 Operation projection 633c Front projection 633d Rear projection 634 Notch Portion 635 Rib portion 651 Upper locking portion 652 Lower locking portion 661 Upper locking protrusion 661c Hedge portion 661d Hedge portion 662 Support projection 663 Notch portion 664c Projection portion 664d Projection portion 671 Engagement projection 671e Reverse projection 672 Back presser plate 673 Contact protrusion 681 Groove 682 Columnar protrusion 683 Locking protrusion 684 Operation plate 70 Blade body 71 Cutting edge 72 Delivery hole 73 Holding hole 70d Rear end inclined surface 80 Operation member 81a Left side plate 81a1 Inner locking protrusion 81b Right side plate 81b1 Inner locking protrusion 82 Top plate 83 Disengagement plate 83c Front end inclined part 83d Rear end inclined part 21c before regulating member 821d after the regulating member 90 the locking member 91 operating knob 92 (92c, 92d) guide posts 93 lock pin 94a groove 94b groove 921 flashing projections

Claims (7)

A tray having an engagement portion;
A blade body that is housed in the tray so as to be movable back and forth and has an engaged portion with which the engaging portion is engaged;
With
The replacement blade for a cutter, wherein the engaging portion is detachably engaged with the engaged portion. The engaging portion is a sliding protrusion formed to protrude from a cantilever spring-like sliding plate provided on the tray,
The replacement blade for a cutter according to claim 1, wherein the engaged portion is a long hole-shaped holding hole formed in the blade body.   A cutter comprising: a main body case for detachably storing the replacement blade for a cutter according to claim 1 or 2; A main body case for detachably storing the replacement blade for the cutter according to claim 2,
A slider provided with an operation member and a pressing portion and configured to be fixed to the blade body;
The tray is fixed to the body case;
The slider is provided to be movable back and forth with respect to the body case,
The cutter is characterized in that the sliding plate is formed with an operation protrusion with which the pressing portion is brought into contact with the back and forth movement of the slider. The main body case has a slit formed on the upper surface along the front-rear direction, and a plurality of notches cut out in the left-right direction from the slit,
The slider has an engaging protrusion that engages with the notch,
The operation member has an engagement release plate for releasing the engagement of the engagement protrusion with the notch in the moving direction of the slider.
The cutter according to claim 4.   The cutter according to claim 4 or 5, wherein the slider is detachably provided to the blade body. An end cap detachably provided at the rear end of the main body case;
A lock member for restricting the attachment / detachment of the end cap and the longitudinal movement of the slider;
The cutter according to any one of claims 4 to 6, further comprising:

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