JP5233008B2 - cutter knife - Google Patents

Description

  The present invention relates to a cutter knife, and more particularly, to a cutter knife having a structure that prevents the cutter blade from being accidentally dropped when the cutter blade is replaced.

  A known cutter knife is configured to include a substantially C-shaped case extending in the front-rear direction, a slider provided to be movable in the front-rear direction in the case, and a cutter blade whose rear end is held by the slider. ing. A locking mechanism is interposed between the slider and the case. This locking mechanism allows the cutter blade to protrude stepwise from the tip of the case, while maintaining the cutter blade in a fixed position. Yes.

In this type of cutter knife, for example, as described in Patent Document 1, a protrusion is formed on the slider, while a hole is formed in a rear end surface of the cutter blade. By positioning the portion in the hole, the slider and the cutter blade can be connected.
Japanese Patent Publication No. 7-85752

  However, the cutter knife disclosed in Patent Document 1 has a configuration in which the cutter blade is simply hooked on the slider. When the cutter blade is taken out from the case together with the slider and the cutter blade is exchanged, the cutter blade is used. Is inadvertently dropped from the slider.

[Object of invention]
The present invention has been devised by paying attention to such inconveniences, and the purpose thereof is a cutter in which the cutter blade does not accidentally fall off from the slider when the cutter blade is replaced. To provide a knife.

In order to achieve the above object, the present invention provides a case having an inner space extending in the front-rear direction, a cutter blade housed in the case and provided so as to be able to protrude from the front end of the case, and the cutter blade. In a cutter knife that includes a slider that is held and movable in the front-rear direction within the case,
The slider includes a slider main body having a temporary holding portion for the cutter blade, and a pressing member provided so as to sandwich the cutter blade between the slider main body and the pressing member. In addition to being movably connected, the other end side is provided so as to be able to be separated and approached by operating one end side, and the cutter blade is allowed to be removed by operating to separate the other end side. ,
The slider adopts a configuration in which the cutter blade is provided so as to be insertable into the case with the tip side of the cutter blade being the tip side in the insertion direction.

  Furthermore, the temporary holding part can be constituted by a protrusion that fits in a hole formed in the rear part of the cutter blade.

  Further, it is preferable that the slider is provided with a rotation restricting portion that restricts the rotation of the cutter blade while temporarily holding the cutter blade.

  According to the present invention, since the predetermined operation of the slider is required when removing the cutter blade, even when the slider and the cutter blade are taken out from the case, the cutter blade is inadvertently dropped. Such inconvenience does not occur.

  Further, since the cutter blade is prevented from falling off by sandwiching the cutter blade between the slider main body and the pressing member constituting the slider, the configuration is not complicated.

  In particular, the cutter blade can be sandwiched and released by connecting the pressing member to the slider body so as to be swingable, so that the cutter blade can be easily replaced.

  Furthermore, by providing the slider main body with a protrusion that fits in the rear hole of the cutter blade and providing a temporary holding portion, the attachment position of the cutter blade can always be maintained at a fixed position.

  In addition, the configuration provided with the rotation restricting portion of the cutter blade can prevent inadvertent movement that causes the cutter blade to rotate with the protrusion as the center of rotation when releasing the above-described pinching, thereby improving safety. Can do.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this specification, “front” is used for the side where the tip of the cutter blade is located, while “rear” is used for the opposite side.

  FIG. 1 shows a schematic perspective view of a cutter knife according to the present embodiment, and FIG. 2 shows an exploded perspective view thereof. In these drawings, the cutter knife 10 is provided so as to be movable in the front-rear direction along the case 12 having an inner space S extending in the front-rear direction, a guide member 13 accommodated in the case 12, and the guide member 13. A cutter blade 14 that can be projected and retracted from the front end of the case 12, a slider 15 that holds the cutter blade 14 and is movable along the guide member 13 together with the cutter blade 14, the slider 15 and the case 12 and a lock mechanism 17 that restricts the forward / backward movement of the slider 15.

  The case 12 has an elongated shape that extends in the front-rear direction and can be held in the palm of the hand. The case 12 includes a bottom wall 20 extending in the front-rear direction, a pair of side wall surfaces 21 continuous in the short width direction of the bottom wall 20, and a top wall 22 continuous between the upper portions of the side wall surfaces 21. The front end and the rear end of the case 12 are open, and a cap 23 is attached to the front end and a tail plug 25 is detachably attached to the rear end. As shown in FIG. 3, the top wall 22 is formed with a slit 27 connected to the inner space S from the rear end to the front end portion at a position slightly shifted to the one side wall surface 21 side. . Further, a vertical hole 28 is formed on the front end surface of the cap 23 for projecting the tip end region of the guide member 13. A window hole 29 extending in the front-rear direction is formed in a region extending between the side wall surface 21 and the side surface of the cap 23 so that the remaining length of the cutter blade 14 located inside can be visually recognized through the window hole 29. It has become. The case 12 in this embodiment is integrally molded using an appropriate resin material, but is molded as a two-part mold having an intermediate position in the thickness direction (a direction perpendicular to the surface of the side wall surface 21) as a mating surface. Alternatively, the cap 23 can be formed integrally with the case 12.

  As shown in FIG. 4, the rear end portion of the bottom wall 20 is a lower bottom wall 20 </ b> A, and the relative surface of the side wall surface 21 in the region of the rear bottom wall 20 </ b> A has a front-rear direction. An extending groove 30 is formed, and a protrusion 31 formed on the tail plug 25 can be fitted into the groove 30. The tail plug 25 has a closed surface with a curved rear end, and a slit 32 connected to the slit 27 formed on the top wall 22 is formed on the upper end surface.

  The cutter blade 14 has the same structure as a known cutter blade with a tip and a rear end inclined with respect to the extending direction of the blade edge to form a substantially parallelogram-like plate shape in plan view and provided with a hole 14A in the rear portion. Is used.

  As shown in FIG. 5, the guide member 13 is connected to the base surface 34 facing the bottom wall 20 and the side wall surface 21 of the case 12 substantially in parallel, and both sides of the base surface 34 in the short width direction. It includes a pair of side wall surfaces 35 that are directed substantially vertically upward and that form a surface substantially parallel to the cutter blade 14. The front end side of the side wall surface 35 is set to an inclined surface portion 35A in which the mutual separation width is gradually narrowed, and a gap that guides the passage of the cutter blade 14 in a substantially straight line within the vertical plane, connected to the front end of the inclined surface portion 35A. The parallel surface portion 35 </ b> B penetrates the vertical hole 28 formed in the front wall 23 of the case 12 and protrudes forward.

  At the upper end portion of the side wall surface 35, a notch portion 37 is formed as a locked portion arranged at a substantially pitch along the front-rear direction. Further, one side wall surface 35 at the front position projects rearward upward. A tongue piece 38 is provided continuously. The tongue piece 38 determines the insertion limit when the guide member 13 is inserted from the rear end in the case 12. An inner window hole 39 that extends in the front-rear direction and overlaps the window hole 29 of the case 12 is formed in the front region of the side wall surface 35.

  The slider 15 is configured to allow removal of the cutter blade 14 by a predetermined operation. As shown in FIGS. 6 and 7, the slider 15 includes a slider main body 42 having a protrusion 41 as a temporary holding portion that fits in a hole 14 </ b> A formed in the rear portion of the cutter blade 14, and the slider main body 42. A pressing member 43 provided so as to interact and sandwich the rear end portion of the cutter blade 14 and an operation member 44 connected to the slider main body 42 are included.

  The slider main body 42 is provided with an outer shape that is substantially parallel to the surface of the cutter blade 14 and has a substantially plate shape in plan view extending in the front-rear direction. As shown in FIGS. 8 to 11, the slider main body 42 is positioned along one surface of the rear end portion of the cutter blade 14 and has a holding surface portion 46 in which the protrusion 41 is integrally provided, An attachment portion 47 that forms an attachment region for the pressing member 43 and the operation member 44 is connected to the rear portion of the holding surface portion 46. The holding surface portion 46 has an inclined raised portion 46A formed at the rear end, and a horizontal raised portion 46B formed at the upper end. The inclined raised portion 46A regulates the position of the rear end of the cutter blade 14 corresponding to the shape of the rear end edge of the cutter blade 14, while the horizontal raised portion 46B is engaged with the upper edge of the rear end of the cutter blade 14 and the cutter. It acts as a rotation restricting portion when the blade 14 is temporarily held.

  The mounting portion 47 includes an upper surface portion 49 set at a position lower than the upper end position of the holding surface portion 46, a lower surface portion 50 connected to the lower end of the holding surface portion 46, and one end side in the width direction of the upper surface portion 49 and the lower surface portion 50. And a front portion 51 connected to the front. The upper surface portion 49 is provided with slot holes 52 at two places in the front-rear direction, and a pair of spring mounting protrusions 53 respectively disposed at the two front and rear positions so that the slot holes 52 are located in the middle. ing. Further, a square hole 54 is formed on the front side 51 in the central portion on the left side in FIG. 8, and as shown in FIG. A pair of upper and lower shafts 57 that are connected to the supporting protrusion 55 and have an axis in the vertical direction are formed. Further, a rib 59 is formed at the central portion 51 of the front portion 51. On the right side of the rib 59 in FIG. 8, a notch hole 61 that is long in the front-rear direction and a left end side that is located in the notch hole 61 are provided. A single spring portion 62 is formed which can be elastically displaced with the free end as a free end.

  As shown in FIGS. 7 and 12 to 15, the pressing member 43 is configured by a generally flat plate-like member. That is, a main body surface 63 having a planar size that fits in front of the mounting portion 47, and a pressing surface whose upper end position is higher than the upper end position of the main body surface 63, which is connected to the left side of the main body surface 63 in FIG. 64. In the main body surface 63, a semicircular ring portion 65 is formed in a plane facing the slider main body 42 along a substantially arc locus protruding from the center portion, and the inner side of the ring portion 65 is a bearing space 66. It is formed as. On the right side of the main body surface 63 in FIG. 14, a raised protrusion 67 that abuts against the single spring portion 62 is formed. Further, the left end of the pressing surface 64 in FIG. 12 is formed with a circular arc notch 69 that avoids positional interference with the protrusion 41 of the holding surface portion 46, and a pressing bulge extending substantially horizontally on both upper and lower sides thereof. A portion 70 is formed.

  As shown in FIGS. 7 and 16 to 19, the operation member 44 includes an operation plane 72 positioned on the upper end portion of the case 12, that is, the top wall 22 and directed in the front-rear direction. A connecting piece 73 that is connected to the upper surface of the plane 72 and extends along the operation plane 72, a finger pad 74 that is connected in a substantially cantilever manner via the connecting piece 73, and the operation plane 72. The bottom surface 76 is provided continuously from the center in the short width direction to the lower side, and the insertion piece portion is inserted into the slot hole 52 so as not to fall off and is located at two front and rear positions on the lower end of the bottom surface 76. 77. Here, the length of the insertion piece portion 77 in the front-rear direction is smaller than the length of the slot hole 52, so that the operation member 44 can move relative to the slider body 42 in the front-rear direction. Can be combined. In the drooping surface portion 76, a retraction hole 80 for retreating a free end side of a leaf spring 83 as a locking member described later inward in the thickness direction is formed at a position near the left end in FIG. The drooping surface portion is a position holding surface 76 </ b> A that keeps the free end side of the leaf spring 83 at the initial position with respect to the slider body 42. In addition, the leaf spring 83 is displaced behind the hanging surface portion 76 so that when the operation force for moving the operation member 44 relative to the slider body 42 in the front-rear direction is released, the operation member 44 is returned to the initial relative position. A projecting portion 81 is formed.

  The lock mechanism 18 is provided between the case 12 and the slider 15. More specifically, the lock mechanism 18 includes a leaf spring 83 as a locking member mounted on the outer peripheral surface side of the spring mounting protrusion 53 positioned at two front and rear positions of the slider body 42, and the guide member 13. It is comprised by the notch part 37 as a to-be-latched part formed in the side wall surface 35. As shown in FIG. As shown in FIGS. 7 and 20, the leaf spring 83 is connected to and opposed to the connecting surface portion 85 located between the two spring mounting protrusions 53 at the front and rear, and the spring mounting protrusion. A short spring piece 87 and a long spring piece 88 located on each outer surface side of the piece 53 are configured. These spring pieces 87 and 88 have their surfaces positioned in a substantially vertical plane, and each front end side has a bent portion 89 that bends and protrudes substantially in an L shape when viewed from above. The bent portions 90 are formed at the front ends of the bent portions 89 so as to be widened at the front ends. Further, the long spring piece 88 is provided with a length having an extension piece portion 91 at the rear portion, and the rear end side of the extension piece portion 91 is a rear portion bent in a substantially L shape inward as viewed from above. A bent portion 93 is formed.

  Next, a method for assembling and using the cutter knife 10 in the present embodiment will be described.

  First, the guide member 13 is inserted from the rear part of the case 12 and fitted into the inner space S to be fixed. On the other hand, in the slider 15, the pressing member 43, the leaf spring 83, and the operation member 44 are sequentially combined with the slider body 42. In this combination, first, in a state where the pressing member 43 is opposed to the slider main body 42 (see FIG. 2), the slider 57 is pressed in the direction of the arrow, and the shaft 57 on the slider main body 42 side is pressed by the ring portion 65 of the pressing member 43. The bearing space 66 (see FIG. 15) to be formed is forcibly fitted. As a result, the pressing member 43 can swing in a direction in which the front end side moves away from the holding surface portion 46 by pressing the rear end side. In other words, the rear end portion of the cutter blade 14 can be sandwiched between the pressing raised portion 70 of the pressing member 43 and the holding surface portion 46.

  Next, after setting the leaf spring 83 so that the short spring piece 87 and the long spring piece 88 are positioned on the outer surface side of the spring mounting protrusion 53 in the slider main body 42, the operation member 44 is connected to the slider main body 42. This connection can be performed by forcibly inserting the insertion piece 77 of the operation member 44 into the slot hole 52 of the slider body 42. In the state where this connection is completed, the leaf spring 83 is in a position where the bent portions 90 of the short spring piece 87 and the long spring piece 88 substantially correspond to the position holding surface 76A (see FIG. 21A). On the other hand, the rear bent portion 93 on the extension piece portion 91 side is engaged with the projecting portion 81 without being deformed. Therefore, the front end sides of the spring pieces 87 and 88 cannot be displaced in the direction approaching each other, and the relative position between the operation member 44 and the slider main body 42 in this state is the initial relative position.

  The cutter blade 14 is held on the slider 15 in a state where the slider 15 is assembled. As shown in FIG. 22A, this holding is performed by pressing the rear end side of the pressing member 43 to separate the front end side of the pressing member 43 from the holding surface portion 46. Then, as shown in FIG. 5B, the rear end side of the cutter blade 14 is inserted between the holding surface portion 46 and the pressing member 43, and the protrusion 41 is inserted into the hole 14A for temporary holding. After that, the pressing on the pressing member 43 may be released. When the pressing is released, the front end side (free end side) of the rear portion of the pressing member 43 approaches the holding surface portion 46 side by an elastic restoring force that the single spring portion 62 returns to the initial planar shape. As a result, as shown in FIG. 22C, the rear portion of the cutter blade 14 is sandwiched between the holding surface portion 46 and the pressing member 43, and unless the pressing member 43 is pressed, the cutter blade 14 is There is no inconvenience that the slider 15 falls off. When the cutter blade 14 is temporarily held, the upper edge of the rear portion of the cutter blade 14 is hooked on the horizontal raised portion 46B of the holding surface portion 46. Therefore, the cutter blade 14 rotates around the protrusion 41 as a rotation center. There is no such thing.

  The unit in a state where the cutter blade 14 is held by the slider 15 is inserted into the case 12 with the tip end side of the cutter blade 14 as the tip end side in the insertion direction. At this time, the connecting piece 73 that supports the operation member 44 in a cantilever posture is located in the slit 27 of the case body 12, and the finger pad 74 is located on the top wall 21. Then, the tail plug 25 is inserted and fitted into the rear end portion of the case 12, whereby the assembly of the cutter knife 10 can be completed.

  When the cutter blade 14 is protruded from the front end of the case 12, a fingertip may be applied to the finger contact portion 74 to apply an operation force toward the front. As a result, the operating member 44 moves relative to the slider main body 42 until the front end of the insertion piece portion 77 abuts against the front end of the slot hole 52, and as a result, the drooping surface portion 76 of the operating member 44 moves forward. The bases of the bent portions 90 of the short spring pieces 87 and the long spring pieces 88 fall into the holes 80 (see FIG. 21B), and the bent portions 89 are retracted inside the side wall surface 21 to form the notches 37 and Accordingly, the slider 15 is allowed to move, and the cutter blade 14 held by the slider 15 can be protruded forward.

  On the other hand, when the cutter blade 14 is accommodated in the case 12, the finger pad 74 may be operated backward. Accordingly, as shown in FIG. 21C, the bent portion 90 is positioned in front of the front end of the drooping surface portion 76, and the bent portion 89 retreats inward and moves backward while releasing the lock. Is acceptable. Then, by releasing the operation force to the finger contact portion 74 at an arbitrary position, the operation member 44 returns to the initial position with respect to the slider body 42, and the bent portion 89 is engaged with the notch portion 37 to be locked. Will keep. The force that returns the operating member 44 to the initial position is displaced by the force that moves the operating member 44 back and forth, so that the state where the rear bent portion 93 is engaged with the protruding portion 81 is displaced. It will be given by the force.

  Therefore, according to such an embodiment, the protrusion 41 provided on the slider body 42 is inserted into the hole 14A of the cutter blade 14 to temporarily hold the cutter blade 14, and the pressing member 43 and the slider body 42 Therefore, when the slider 15 and the cutter blade 14 are extracted from the rear end of the case 12 and the cutter blade 14 is replaced, the cutter blade 14 is moved to the slider 15. Therefore, it is possible to provide the cutter knife 10 capable of avoiding inconvenience such as inadvertent dropping.

The best configuration, method and the like for carrying out the present invention have been disclosed in the above description, but the present invention is not limited to this.
That is, the invention has been illustrated and described with particular reference to particular embodiments, but it should be understood that the above-described embodiments are not deviated from the technical idea and scope of the invention. On the other hand, those skilled in the art can make various modifications in shape, material, quantity, and other detailed configurations.
Therefore, the description limited to the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

For example, in the above embodiment, a so-called universal type cutter knife is shown and described, but the present invention is not limited to this, and a conventional type cutter in which a slider is arranged on the side surface side of a substantially C-shaped case. Does not interfere with applying to the knife.
In short, according to the present invention, various design changes can be made as long as the cutter blade is not accidentally dropped when the slider holding the cutter blade is extracted from the case.

The schematic perspective view of the cutter knife which concerns on this embodiment. The disassembled perspective view of the said cutter knife. The top view which shows the state which accommodated the guide member in the case. (A) is a longitudinal cross-sectional view of FIG. (B) is an expanded sectional view which follows the AA line of FIG. 4 (A). (A) is a top view of a guide member, (B) is a front view of a guide member. The schematic perspective view which shows the state which made the slider hold | maintain the cutter blade. The expansion disassembled perspective view of FIG. The front view of a slider main body. The expanded sectional view which follows the BB line of FIG. Sectional drawing which follows the CC line | wire of FIG. The top view of a slider main body. The front view of a pressing member. The rear view of a pressing member. The top view of a pressing member. The expanded sectional view which follows the DD line of FIG. The top view of an operation member. The front view of an operation member. The left view of FIG. Cross section of operation member (A) is a top view of a leaf | plate spring, (B) is the same front view. (A)-(C) is an operation explanatory view of locking and unlocking. (A)-(C) is an operation explanatory view which attaches a cutter blade to a slider.

Explanation of symbols

10 Cutter Knife 12 Case 14 Cutter Blade 14A Hole 15 Slider 41 Projection (Temporary Holding Part)
42 Slider body 43 Holding member)
46B Horizontal protuberance S Inner space

Claims (3)

A case having an inner space extending in the front-rear direction, a cutter blade that is housed in the case and that can be projected and retracted from the front end of the case, and holds the cutter blade and moves in the front-rear direction in the case In a cutter knife including a slider provided in a possible manner,
The slider includes a slider main body having a temporary holding portion for the cutter blade, and a pressing member provided so as to sandwich the cutter blade between the slider main body and the pressing member. In addition to being movably connected, the other end side is provided so as to be able to be separated and approached by operating one end side, and the cutter blade is allowed to be removed by operating to separate the other end side. ,
The slider is provided so that it can be inserted into the case with the front end side of the cutter blade in the insertion direction front end side while holding the cutter blade .   The cutter knife according to claim 1, wherein the temporary holding portion is constituted by a protrusion that fits in a hole formed in a rear portion of the cutter blade.   The cutter knife according to claim 2, wherein the slider is provided with a rotation restricting portion that restricts the rotation of the cutter blade while temporarily holding the cutter blade.

Images