CN215589227U

CN215589227U - Practical knife

Info

Publication number: CN215589227U
Application number: CN202022909777.3U
Authority: CN
Inventors: 陈咏顺; 吴政洲
Original assignee: Wu Zhengzhou; Mingxin International Co ltd
Current assignee: Wu Zhengzhou; Mingxin International Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-01-21
Anticipated expiration: 2030-12-07

Abstract

The utility model relates to a utility knife, comprising: a shell, a tool post, a tool magazine base and a locking mechanism. The shell is surrounded with a working chamber and a storage chamber; the tool apron is movably accommodated in the working chamber; the tool magazine base is movably inserted in the storage chamber and comprises a storage part and an extraction part which are connected, and the extraction part protrudes out of the shell; the locking and releasing mechanism comprises a base body, a moving piece, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving piece is arranged on the base body, the first clamping and supporting part is arranged on the moving piece, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove. The utility model locks through the locking mechanism, so that the tool magazine base can be really combined with the shell to contain the spare blade, and the tool magazine base is quite convenient to take out and put back the shell, thereby meeting the requirement of quick use.

Description

Practical knife

Technical Field

The present invention relates to utility knives.

Background

Utility knives (utility knife), also known as utility knives, are shaped to fit one-handed grips, are commonly used to cut sheet material, such as cut paper, cut adhesive tape, cut fabric, and the like, and are commonly found in processing plants and warehouses, such as taiwan patent I309197, M478597, US2007074402a1, US2003037444a1, and the disclosed utility knives are of this type.

However, the tool magazine base for storing the spare blades of the utility knife has practical disadvantages, such as that the tool magazine base of taiwan patent I309197 is used by a pivot swinging method, and the hooking point is often too small, so that the fingers of the user cannot be hooked and screwed out smoothly; the tool magazine seat of taiwan patent I309197 is combined with the housing in a tight fit manner, and has the defect that the tool magazine seat cannot be combined in a tight fit manner really due to unexpected falling or abrasion; the US patent 2003037444A1 has various opening modes, but has the problems that a rotary cover is easy to be touched and opened by mistake, a rotary blade is easy to fall off and the like; the problem of the cover being easily lost is that of US2007074402a 1.

Therefore, there is a need to provide a new and improved utility knife to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main objective of the present invention is to provide a utility knife, which is locked by a locking mechanism, so that the tool magazine base can be securely combined with the housing to accommodate the spare blade, and the tool magazine base can be conveniently taken out and put back into the housing, thereby satisfying the requirement of rapid use.

To achieve the above object, the present invention provides a utility knife, comprising: a shell, a tool post, a tool magazine base and a locking mechanism. The shell is surrounded with a working chamber and a storage chamber; the tool apron is movably accommodated in the working chamber and used for positioning a working blade; the tool magazine base is movably inserted in the storage chamber and comprises a storage part and an extraction part which are connected, wherein the storage part is used for accommodating at least one spare blade, and the extraction part protrudes out of the shell and is used for external clamping operation; the locking and releasing mechanism comprises a base body, a moving piece, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving piece is arranged on the base body and can move relatively to a locking position and a releasing position, the first clamping and supporting part is arranged on the moving piece to form a synchronous movement relation, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove; when the moving member is located at the locking position to enable the clamping protrusion to be embedded into the clamping groove, the tool magazine base cannot move to be separated from the shell, and when the moving member is located at the releasing position to enable the clamping protrusion to be separated from the clamping groove, the tool magazine base can move to be separated from the shell.

Preferably, the moving member is slidably sleeved on the base, and the sliding direction of the moving member is transverse to the extracting direction of the tool magazine base.

Preferably, the locking and unlocking mechanism further includes an elastic member disposed between the housing and the moving member to urge the moving member to normally have a tendency of moving toward the locking position.

Preferably, the locking protrusion is in a shape of a barb and is provided with a first inclined surface portion, an outer groove wall of the locking groove is provided with a second inclined surface portion facing the first inclined surface portion, and when the tool magazine base is inserted into the storage chamber from the outside and moves close to the base body, the first inclined surface portion and the second inclined surface portion slide against each other to drive the moving member to move toward the release position.

Preferably, the drawing part is provided with at least one groove for the finger part to extend into and drive the drawing part to move in a hooking manner.

Preferably, the housing further comprises an arc recess, the arc recess direction of the arc recess is transverse to the recess direction of the groove, and the arc recess is communicated with the groove.

Preferably, the tool changer further comprises a tool changing knob movably disposed in the housing along a first direction, the tool apron comprises a deformation portion elastically deformable along the first direction, the deformation portion is provided with a positioning portion for inserting and positioning the working blade and a touch portion for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released.

Preferably, the tool magazine further comprises a pressing portion, and a portion of the pressing portion extends into the storage portion for pressing and positioning the at least one spare blade.

Preferably, the pressing part is a sheet body with elastic deformation capability.

Preferably, the moving member is slidably sleeved on the base body, and the sliding direction of the moving member is transverse to the extraction direction of the tool magazine base; the drawing part is provided with at least one groove for the finger part to extend into and drive the drawing part to move in a hooking way; the shell further comprises an arc concave part, the arc notch direction of the arc concave part is transverse to the notch direction of the groove, and the arc concave part is communicated with the groove; the utility knife also comprises a knife-changing button which can be arranged on the shell along a first direction in a moving way, the knife holder comprises a deformation part which can elastically deform along the first direction, the deformation part is provided with a positioning part and a touch part, the positioning part is used for embedding and positioning the working blade, and the touch part is used for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released; the tool magazine base further comprises a pressing part, and part of the pressing part extends into the storage part to press and position the at least one spare blade; the pressing part is a sheet body with elastic deformation capability; two connecting claws of the moving part penetrate through the shell and are connected with a push button, the two connecting claws are connected with the sleeve body, and the push button is used for external operation and pressing; the first clamping and abutting part is the clamping protrusion, and the second clamping and abutting part is the clamping groove; the moving element further comprises a sleeve body and two arms, the sleeve body is sleeved on the base body, one ends of the two arms are connected to the sleeve body at intervals, the other ends of the two arms are clamped and connected with the clamping protrusions, the two arms and the clamping protrusions jointly enclose an inserting space, the tool magazine base further comprises an inserting section, the inserting section and the extracting portion are located at two opposite ends of the tool magazine base, the clamping groove penetrates through the inserting section, one side, opposite to the extracting portion, of the inserting section is provided with the second inclined plane portion, and the inserting section can be selectively inserted into the inserting space so that the clamping protrusions are clamped into the clamping groove; the storage part is positioned at one end of the tool magazine base far away from the extraction part, the insertion section protrudes out of the storage part, one side of the storage part, back to the extraction part, is open and is concavely provided with an embedded groove, and when the insertion section is inserted into the insertion space, an arm part is embedded into the embedded groove and extends into the storage part to stop and limit the at least one spare blade; the number of the at least one groove is two, and the two grooves are respectively arranged on two opposite surfaces of the extraction part.

The utility model has the advantages that:

the utility knife provided by the utility model is locked by the locking and releasing mechanism, so that the knife magazine seat can be really combined with the shell to contain the spare blade, and the knife magazine seat is quite convenient to take out and put back the shell, thereby meeting the requirement of quick use.

Drawings

Fig. 1 and fig. 2 are perspective views from different viewing angles according to an embodiment of the present invention.

FIG. 3 is an exploded view of an embodiment of the present invention.

Fig. 4 and 5 are perspective views of the tool magazine base according to an embodiment of the utility model.

FIG. 6 is a partial enlarged view of an embodiment of the present invention.

Fig. 7 and 8 are sectional views illustrating the operation of the locking and unlocking mechanism according to an embodiment of the present invention.

Fig. 9 to 10 are schematic views illustrating movement of the tool holder according to an embodiment of the utility model.

Fig. 11 to 12 are schematic views illustrating the actuation of a tool changer according to an embodiment of the present invention.

Detailed Description

The following description is given by way of example only, and is not intended to limit the scope of the utility model.

Referring to fig. 1 to 12, which illustrate a preferred embodiment of the present invention, a utility knife of the present invention includes: a shell 1, a tool holder 2, a tool magazine holder 3 and a locking mechanism 4.

The housing 1 encloses a working chamber 11 and a storage chamber 12, the tool holder 2 is movably accommodated in the working chamber 11 for positioning a working blade 71, and the tool magazine base 3 is movably inserted into the storage chamber 12. In detail, the tool magazine 3 comprises a storage portion 32 and an extraction portion 31 connected to each other, the storage portion 32 is used for receiving at least one spare blade 72, and the extraction portion 31 protrudes from the housing 1 for external clamping operation. More specifically, the locking and releasing mechanism 4 includes a base 41, a moving member 42, a first engaging portion and a second engaging portion, the base 41 is disposed on the housing 1, the moving member 42 is disposed on the base 41 and can move relatively to a locking position and a releasing position, the first engaging portion is disposed on the moving member 42 to move in unison, the second engaging portion is disposed on the tool magazine base 3, one of the first engaging portion and the second engaging portion is a locking slot 34, and the other is a locking protrusion 46 that can be releasably engaged with the locking slot 34; when the moving member 42 is located at the locking position to make the locking protrusion 46 engage with the locking slot 34, the tool magazine base 3 cannot move away from the housing 1, and when the moving member 42 is located at the releasing position to make the locking protrusion 46 disengage from the locking slot 34, the tool magazine base 3 can move away from the housing 1.

Preferably, the locking mechanism 4 further comprises an elastic member 48, the elastic member 48 is disposed between the housing 1 and the moving member 42 to urge the moving member 42 to have a tendency of moving toward the locking position in a normal state, so that the tool magazine base 3 can be reliably kept at the locking position against an unexpected external force.

In this embodiment, the first engaging portion is the engaging protrusion 46, the second engaging portion is the engaging groove 34, the engaging protrusion 46 is in a shape of a barb and is provided with a first inclined surface portion 47, an outer groove wall of the engaging groove 34 is provided with a second inclined surface portion 35 facing the first inclined surface portion 47, when the tool magazine base 3 is inserted into the storage chamber 12 from the outside and moves toward the base 41, the first inclined surface portion 47 and the second inclined surface portion 35 slide against each other to drive the moving member 42 to move toward the releasing position, and the elastic member 48 is restored to achieve the effect of automatic locking. Moreover, the moving member 42 is slidably sleeved on the base 41, and the sliding direction of the moving member 42 is transverse to the extracting direction of the tool magazine base 3.

More specifically, the moving member 42 further includes a sleeve 43 and two arms 44, the sleeve 43 is sleeved on the base 41, one end of each of the two arms 44 is connected to the sleeve 43 at an interval, the other end of each of the two arms 44 is connected to the corresponding protrusion 46 in a clamping manner, and the two arms 44 and the protrusion 46 together form an insertion space 45. Moreover, the two connecting claws 49 of the moving member 42 are connected to a push button 51 through the housing 1, the two connecting claws 49 are connected to the sleeve 43, and the push button 51 is pressed by external operation and can be released quickly by pressing. In addition, the tool magazine base 3 further includes an insertion section 33, the insertion section 33 and the extraction portion 31 are located at two opposite ends of the tool magazine base 3, the slot 34 is disposed through the insertion section 33, the second inclined plane portion 35 is disposed at a side of the insertion section 33 opposite to the extraction portion 31, the insertion section 33 can be selectively inserted into the insertion space 45, so that the protrusion 46 is engaged with the slot 34; wherein, the inserting and matching of the inserting space 45 and the inserting section 33 can improve the combination accuracy and has the function of guiding the inserting direction to prevent the fool.

More specifically, the storage part 32 is located at an end of the tool magazine base 3 away from the drawing part 31, the inserting section 33 protrudes out of the storage part 32, one side of the storage part 32 opposite to the drawing part 31 is open and is concavely provided with an inserting groove 37, when the inserting section 33 is inserted into the inserting space 45, an arm 44 is inserted into the inserting groove 37 and extends into the storage part 32 for stopping and limiting the at least one spare blade 72, thereby simultaneously improving the placing stability of the at least one spare blade 72 and the stability of the tool magazine 2 inserted into the housing 1.

Preferably, the tool magazine base 3 further comprises a pressing portion 36, and a portion of the pressing portion 36 extends into the storage portion 32 for pressing and positioning the at least one spare blade 72, so as to substantially and firmly position the at least one spare blade 72, thereby providing a better synchronous action effect. In the present embodiment, the pressing portion 36 is a sheet with elastic deformation capability, so as to insert or extract the at least one spare blade 72.

Preferably, the extracting portion 31 is provided with at least one groove 311, the at least one groove 311 is used for the finger portion to extend into and drive the extracting portion 31 to move in a hooking manner, in this embodiment, the number of the at least one groove 311 is two, and the two grooves 311 are respectively disposed on two opposite surfaces of the extracting portion 31.

Preferably, the housing 1 further comprises an arc recess 13, the arc recess direction of the arc recess 13 is transverse to the recess direction of the groove 311, and the arc recess 13 is connected to the groove 311 to further provide a space margin for the finger.

The utility knife further includes a tool changing button 52, the tool changing button 52 can be movably disposed on the housing 1 along a first direction 6, the knife holder 2 includes a deformation portion 21, the deformation portion 21 can elastically deform along the first direction 6, the deformation portion 21 is provided with a positioning portion 211 and a touching portion 212, the positioning portion 211 is used for embedding and positioning the working blade 71, and the touching portion 212 is used for crossing the working blade 71. It can be understood that the tool holder 2 can move to a predetermined position along the first direction 6, when the tool holder 2 is located at the predetermined position, the trigger 212 is located on the moving path of the tool changing button 52, the tool changing button 52 is pushed against the trigger 212 by an external operation to deform the deformation portion 21, so that the positioning portion 211 is disengaged from the working blade 71 to release the working blade 71, and at this time, a user can pull out the working blade 71 for replacement or turning.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A utility knife, comprising:

a shell, which encloses a working chamber and a storage chamber;

a cutter seat movably accommodated in the working chamber for positioning a working blade;

a tool magazine base, movably inserted in the storage chamber, comprising a storage part and an extraction part which are connected, wherein the storage part is used for accommodating at least one spare blade, and the extraction part protrudes out of the shell and is used for external clamping operation; and

a locking and releasing mechanism, which comprises a base body, a moving member, a first clamping and supporting part and a second clamping and supporting part, wherein the base body is arranged on the shell, the moving member is arranged on the base body and can relatively move between a locking position and a releasing position, the first clamping and supporting part is arranged on the moving member to form a synchronous movement relation, the second clamping and supporting part is arranged on the tool magazine base, one of the first clamping and supporting part and the second clamping and supporting part is a clamping groove, and the other clamping and supporting part is a clamping protrusion which can be releasably embedded with the clamping groove;

when the moving member is located at the locking position to enable the clamping protrusion to be embedded into the clamping groove, the tool magazine base cannot move to be separated from the shell, and when the moving member is located at the releasing position to enable the clamping protrusion to be separated from the clamping groove, the tool magazine base can move to be separated from the shell.

2. The utility knife of claim 1, wherein the moving member is slidably engaged with the base member, and the sliding direction of the moving member is transverse to the withdrawing direction of the magazine holder.

3. The utility knife of claim 1, wherein the locking mechanism further comprises a resilient member disposed between the housing and the movable member to urge the movable member to normally move toward the locked position.

4. The utility knife according to claim 3, wherein the locking protrusion is in the shape of a barb and has a first inclined surface portion, the outer wall of the locking groove has a second inclined surface portion facing the first inclined surface portion, and when the magazine base is inserted into the storage chamber from the outside and moved toward the base to approach, the first inclined surface portion and the second inclined surface portion slide against each other to drive the moving member toward the release position.

5. The utility knife of claim 1, wherein the extracting portion has at least one groove for the finger portion to extend into for hooking movement of the extracting portion.

6. The utility knife of claim 5, wherein the housing further comprises an arcuate recess having an arcuate notch direction transverse to the notch direction of the groove, the arcuate recess communicating with the groove.

7. The utility knife according to claim 1, further comprising a knife changing button movably disposed in the housing along a first direction, the knife holder comprising a deformation portion elastically deformable along the first direction, the deformation portion having a positioning portion for inserting and positioning the working blade and a touch portion for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released.

8. The utility knife of any of claims 1 to 7, wherein the magazine base further comprises a pressing portion, a portion of the pressing portion extending into the storage portion for pressing against and positioning the at least one spare blade.

9. The utility knife of claim 8, wherein the pressing portion is a sheet having elastic deformation capability.

10. The utility knife according to claim 4, wherein the moving member is slidably engaged with the base member, and a sliding direction of the moving member is transverse to a withdrawing direction of the magazine holder; the drawing part is provided with at least one groove for the finger part to extend into and drive the drawing part to move in a hooking way; the shell further comprises an arc concave part, the arc notch direction of the arc concave part is transverse to the notch direction of the groove, and the arc concave part is communicated with the groove; the utility knife also comprises a knife-changing button which can be arranged on the shell along a first direction in a moving way, the knife holder comprises a deformation part which can elastically deform along the first direction, the deformation part is provided with a positioning part and a touch part, the positioning part is used for embedding and positioning the working blade, and the touch part is used for crossing the working blade; the tool holder can move to a preset position along the transverse first direction, when the tool holder is positioned at the preset position, the touch part is positioned on a moving path of the tool changing button, the tool changing button is pushed against the touch part by external operation to drive the deformation part to deform, and the positioning part is separated from the working blade to be released; the tool magazine base further comprises a pressing part, and part of the pressing part extends into the storage part to press and position the at least one spare blade; the pressing part is a sheet body with elastic deformation capability; two connecting claws of the moving part penetrate through the shell and are connected with a push button, the two connecting claws are connected with the sleeve body, and the push button is used for external operation and pressing; the first clamping and abutting part is the clamping protrusion, and the second clamping and abutting part is the clamping groove; the moving element further comprises a sleeve body and two arms, the sleeve body is sleeved on the base body, one ends of the two arms are connected to the sleeve body at intervals, the other ends of the two arms are clamped and connected with the clamping protrusions, the two arms and the clamping protrusions jointly enclose an inserting space, the tool magazine base further comprises an inserting section, the inserting section and the extracting portion are located at two opposite ends of the tool magazine base, the clamping groove penetrates through the inserting section, one side, opposite to the extracting portion, of the inserting section is provided with the second inclined plane portion, and the inserting section can be selectively inserted into the inserting space so that the clamping protrusions are clamped into the clamping groove; the storage part is positioned at one end of the tool magazine base far away from the extraction part, the insertion section protrudes out of the storage part, one side of the storage part, back to the extraction part, is open and is concavely provided with an embedded groove, and when the insertion section is inserted into the insertion space, an arm part is embedded into the embedded groove and extends into the storage part to stop and limit the at least one spare blade; the number of the at least one groove is two, and the two grooves are respectively arranged on two opposite surfaces of the extraction part.