CN218082822U

CN218082822U - Folding knife with blade replacing structure

Info

Publication number: CN218082822U
Application number: CN202221813882.XU
Authority: CN
Inventors: 张寰
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-12-20
Anticipated expiration: 2032-07-13

Abstract

The utility model provides a folding knife containing blade replacement structure, including handle body 1, blade fixing base 2, blade 3 and connecting nail 4, blade fixing base 2 includes first splint 21, second splint 22, space bar 23 and shell fragment 221, first splint 21, second splint 22 and space bar 23 enclose into the dress embedding groove that holds the blade and insert jointly, and when folding knife was in the state of opening completely, first draw-in groove 31 on the blade 3 cooperated with first calorie of protruding 231 on the space bar 23, second draw-in groove 32 on the blade 3 cooperated with the second calorie of protruding on the shell fragment 221; the blade fixing seat 2 and the blade 3 can be rotatably accommodated in the handle body 1 along the connecting nail 4. The utility model has the advantages of, the blade is reliable and stable with being connected of blade fixing base, when the blade needs to be changed, only needs to press down press switch, makes the protruding and blade draw-in groove of card break away from the side and can remove the restriction of blade displacement in the front and back direction.

Description

Folding knife with blade replacing structure

Technical Field

The application relates to the technical field of cutting tools, in particular to a folding knife comprising a blade replacing structure.

Background

The utility model discloses a chinese utility model patent that the bulletin number is CN209665439U discloses a tool bit of folding art designer's sword, including knife rest, blade, the knife rest is formed by upper cover and base mutual involution connection, and the knob downthehole tool changing lock button that is equipped with of the upper cover of this knife rest is equipped with first spring plate groove on the base of this knife rest, is provided with bow-shaped spring leaf in the first spring plate groove, and the top surface of spring leaf and the basal surface elasticity of tool changing lock button lean on connect, and two lug locks that tool changing lock button received opening recess lower surface on it to be equipped with are put into two blade locked grooves on blade upper portion, and the blade locking is fixed in the blade chamber of knife rest, and when the new blade is changed to the tool bit, press down tool changing lock button and can make two lug locks break away from and be connected with the locking of two blade locked grooves on blade upper portion.

The blade of the cutter head of the folding utility knife is convenient to replace, but has defects, for example, the used blade is a trapezoidal blade which is universally used in the industry, the blade is thinner and lower in strength, and is mainly used for cutting paper, packaging sealing adhesive tapes and the like, and the cutter head is not applicable to cutting objects such as fruits, hard objects and the like in daily life of people, and has great limitation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem existing in the prior art and providing a folding knife which is suitable for cutting hard objects, such as the blades used for cutting fruits and the like in daily use, and the blades are convenient to replace, and the blades are replaced by a convenient blade replacing structure and the blade replacing structure.

The utility model discloses a following technical scheme realizes.

The utility model provides a structure is changed to blade, including blade and blade fixing base, the blade fixing base includes first splint, second splint, space bar and first shell fragment, the space bar sets up between first splint and second splint, first splint, second splint and space bar enclose jointly into holding blade male blade dress caulking groove, the knife tip one side that is close to of space bar is equipped with the first card that extends forward protruding, the blade be equipped with the mouth of dodging the space bar with the relative one side of cutting part, the edge of dodging the mouth is equipped with the first draw-in groove with the protruding complex of first card in the position that corresponds first card, blade dress caulking groove is close to the cutting part and is equipped with down spacing wall, when blade dress caulking groove is inserted completely at the blade, spacing wall keeps away from the knife tip with the blade and is close to cutting part one side counterbalance down, the space bar is equipped with the groove of dodging in the position that corresponds first shell fragment, first draw-in groove includes first end and second end, the first end and second splint fixed connection of first shell fragment are equipped with the protruding of the operation of dodging the second card and the edge of second clip and the protruding cooperation of operation of second clip, the edge of second clip, the protruding of the corresponding.

Optionally, the partition plate and the second clamping plate are integrally formed, and the first end of the first elastic sheet is fixedly connected with the second clamping plate through a connecting nail.

Optionally, push switch is a cylinder, first splint are in push switch corresponds the position and is equipped with and dodges the hole, push switch passes and dodges the hole and extends to the first splint outside.

Optionally, the partition plate and the second clamping plate are of a split structure, wherein the first end of the first elastic sheet is integrally connected with the second clamping plate.

Optionally, the other edge of the first resilient tab is separated from the first clip plate by an interruption slot that penetrates the second clip plate.

Optionally, a bent portion is disposed at a first end of the first elastic sheet, and a second end of the first elastic sheet is lifted up toward the blade relative to the second clamping plate.

Optionally, the end surface of the first clamping protrusion close to one side of the blade is arranged to be an arc-shaped end surface, and the edge shape of the avoidance opening of the blade is arranged to be matched with the shape of the outer edge of the partition plate.

The utility model also provides a folding knife, including the handle body and the aforesaid the blade change the structure, the knife tip one side is kept away from to the blade fixing base is equipped with the connecting hole, the handle body is through connecting nail and blade fixing base pin joint, the handle body is equipped with accomodates the groove, the blade fixing base can use the connecting nail to convert into for the relative handle body rotation of pivot and accomodate in accomodating the groove.

Optionally, the handle body is provided with a limit nail at a position close to the connecting nail relative to one side of the cutting part, a first limit groove and a second limit groove are formed in the edge of one side of the blade fixing seat far away from the tool nose, the first limit groove abuts against the limit nail when the blade is in a fully opened state, and the second limit groove abuts against the limit nail when the blade is fully closed.

Optionally, a second elastic sheet is disposed on a groove wall of one side of the accommodating groove, and the second elastic sheet is configured such that when the blade holder is located at the fully open position, one side of the second elastic sheet close to the knife tip can abut against a rear edge of the blade holder to maintain the fully open state of the blade holder.

The application provides a folding knife who contains blade replacement structure has following advantage:

1. the blade is connected with the blade fixing seat stably and reliably. When the blade needs to be replaced, the second clamping protrusion and the second clamping groove are separated by operating the press switch, so that the displacement limitation of the blade in the front-back direction can be relieved, and the blade replacement operation is very convenient.

2. The great blade of size requires much more to the intensity of blade fixing base, and second splint, space bar all need have corresponding thickness promptly and can guarantee intensity, and first shell fragment adopts independent structure, and its elasticity can not receive the restriction of second splint thickness, when having solved the great blade of assembly size, the intensity problem of blade fixing base.

3. The first elastic sheet integrally formed with the second clamping plate improves the elasticity of the first elastic sheet by arranging the bending part at the first end position, and the technical problems that the hardness of the first elastic sheet is too high and the elasticity is insufficient are solved.

4. Under the prerequisite of guaranteeing that blade fixing base and blade are connected and have sufficient intensity, the thickness of blade fixing base can be made thinner, save material, reduce cost. Is more suitable for assembling blades with small size, such as small-size fruit blades and the like.

Drawings

FIG. 1 is an exploded view of a blade and a blade holder according to an embodiment of the present invention;

FIG. 2 is a schematic view of a blade holder, a spacer and a first resilient plate according to an embodiment of the present invention;

FIG. 3 is a schematic view of a blade holder and a push switch according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a second blade holder, a spacer and a first resilient piece according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a second first elastic sheet and a second clamping plate according to an embodiment of the present invention;

fig. 6 is a schematic structural view of the second blade of the embodiment of the present invention cooperating with the first elastic sheet and the fixing base;

FIG. 7 is a schematic structural view of the three-folding knife blade of the present invention with the handle cover omitted when fully opened;

fig. 8 is a schematic view of the blade of the triple folding knife of the embodiment of the present invention being received in the handle receiving groove;

fig. 9 is a schematic view of the first limit groove and the limit nail of the handle body when the blade of the three-folding knife of the embodiment of the present invention is closed;

fig. 10 is a schematic view of the second limit groove and the handle limit nail when the blade of the three-folding knife of the embodiment of the present invention is opened.

In the figure: 1-a handle body; 2-blade holders; 21-a first clamping plate; 211-avoiding holes; 22-a second splint; 221-a first spring plate; 222-second snap; 223-connecting nails; 23-a spacer plate; 231-first snap; 232-a lower limiting wall; 24-blade mounting caulking groove; 25-a push switch; 26-connecting holes; 27-a first limit groove; 28-a second limiting groove; 3-a blade; 31-a first card slot; 32-a second card slot; 4-connecting nails.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described below with reference to the accompanying drawings. The drawings are for illustrative purposes only and are not to be construed as limiting the patent.

In order to explain the embodiment more simply, some parts of the drawings or descriptions that are well known to those skilled in the art but are not relevant to the main content of the present invention will be omitted. In addition, some components in the drawings may be omitted, enlarged or reduced for convenience of description, but do not represent the size or the entire structure of an actual product.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example one

As shown in fig. 1 to 3, the present embodiment provides a blade replacement structure, which includes a blade 3 and a blade holder 2, wherein the blade holder 2 includes a first clamping plate 21, a second clamping plate 22, a spacing plate 23 and a first elastic sheet 221, the spacing plate 23 is disposed between the first clamping plate 21 and the second clamping plate 22, and the first clamping plate 21, the second clamping plate 22 and the spacing plate 23 jointly enclose a blade-mounting groove 24 for accommodating the insertion of the blade 3. Wherein, the space bar 23 is close to knife tip one side and is equipped with first card protruding 231, blade 3 and cutting part relative and be close to one side of knife tip be equipped with first card first draw-in groove 31 of protruding 231 complex, when first shell fragment set to be under the natural state, first card is protruding to be gone into in the first draw-in groove. Spacing plate 23 is kept away from knife tip one side and is equipped with down spacing wall 232, spacing wall 232 offsets with one side that blade 3 kept away from the knife tip and is close to the cutting part, with the downward displacement of rear portion of restriction blade, spacing plate 23 is equipped with in the position that corresponds first shell fragment 221 and dodges the groove, first shell fragment 221 includes first end and second end, the first end and the second splint 22 fixed connection of first shell fragment 221, the second end sets up in blade dress caulking groove 24, second end fixedly connected with press switch 25, first shell fragment 221 is equipped with the protruding 222 of second card with cutting part syntropy one side, blade 3 just keeps away from one side of knife tip relatively with the cutting part and is equipped with the protruding 222 complex second draw-in groove 32 of second card. In the above technical solution, after the blade 3 is completely inserted into the blade embedding groove 24, the first locking protrusion 231 is matched with the first locking groove 31 to limit the front portion of the blade 3 from moving up and down, and the lower limit wall 232 arranged at the rear portion of the blade embedding groove 24 can limit the tail portion of the blade 3 from moving down, at this time, the second locking protrusion 222 is automatically locked into the second locking groove 32 under the elastic action of the first elastic piece 221, so that the blade 3 cannot move in the front and rear positions at this time, thereby locking the blade 3 in the up-down and front-rear directions is realized, and the blade 3 is fixedly connected with the blade 3 fixing seat, and the blade 3 is limited in the up-down and front-rear directions, and the connection with the blade fixing seat 2 is also very stable and reliable. When the blade needs to be replaced, only the press switch needs to be operated, the second clamping protrusion and the second clamping groove are separated, so that the limitation of the displacement of the blade in the front and rear directions can be removed, the blade can be replaced at the moment, and the blade is very convenient to replace.

Optionally, in this embodiment, the partition plate 23 and the second clamping plate 22 are an integrally formed structure, and the first end of the first elastic sheet is fixedly connected to the second clamping plate through the connecting nail 22. The integrated into one piece's design can improve structural strength to realize the more stable centre gripping of blade, reduced the possibility that the displacement appears or drops in the use in the blade. When the great blade of matching size, the intensity demand of blade fixing base is higher, and second splint, space bar all need have corresponding thickness promptly and just can guarantee intensity, and first shell fragment adopts independent structure, and its elasticity can not receive the restriction of second splint thickness, and when this technical scheme can solve the great blade of assembly size, the intensity problem of blade fixing base.

Optionally, the push switch 25 is a cylinder, the first clamping plate 21 is provided with an avoiding hole 211 at a position corresponding to the push switch 25, and the push switch 25 passes through the avoiding hole 211 and extends to the outer side of the first clamping plate 21. The push switch extends to the outer side of the clamping plate through the avoiding hole, so that the operation difficulty in blade replacement is reduced, the structure of the push switch more accords with the ergonomic principle, and the folding knife can be replaced by the blade when being opened or stored.

Example two

As shown in fig. 4 to 6, another blade replacing structure is provided in this embodiment, and the manner of matching the blade 3 with the blade holder 2 is the same as that in the above embodiment, and will not be described again here. The difference between the present embodiment and the above embodiments is that the partition plate 23 and the second clamping plate 22 in the blade fixing seat 2 are in a split structure, the partition plate 23 and the second clamping plate 22 are connected to each other by a connecting nail, and the first end of the first elastic piece 221 and the second clamping plate 22 are integrally formed. Compared with the spacing plate 23 and the second clamping plate 22 which are integrally formed in the above embodiment, the thickness of the blade fixing seat 2 can be made thinner on the premise that the blade fixing seat 2 and the blade 3 are connected to have enough strength in the split structure in the embodiment, so that the material is saved, and the cost is reduced. Is more suitable for assembling small-sized blades, such as small-sized fruit blades and the like. Compared with the first embodiment, the structure in which the first elastic piece 221 and the second clamping plate 22 are integrally formed reduces the structural complexity, and can achieve the effect of reducing the production cost. Optionally, a first end of the first resilient piece 221 is provided with a bending portion, and a second end of the first resilient piece 221 is lifted toward the blade relative to the second clamping plate. In order to guarantee the strength of the blade fixing seat, the thickness of the first clamping plate cannot be too thin, the first elastic sheet integrally formed with the first clamping plate is provided with a bending portion at the first end position, the elasticity of the first elastic sheet can be improved, and the technical problems that the hardness of the first elastic sheet is too high and the elasticity is insufficient can be solved.

Optionally, the other edge of the first resilient tab 221 is separated from the second clamping plate by an intermittent slot through the second clamping plate 22. In this embodiment, after the first elastic sheet 221 is separated from the second clamping plate 22, the first elastic sheet 221 can obtain a larger working stroke, that is, the upper and lower moving ranges are larger, the larger working stroke enables the first elastic sheet 221 to adapt to more blades 3 with different thicknesses, and the structural adaptability is improved.

Optionally, the first locking protrusion 231 is disposed as an arc end surface near one side end surface of the blade, and the edge shape of the avoiding opening of the blade 3 is disposed to match the outer edge shape of the partition plate. In this embodiment, the contact end surface of the first clamping protrusion 231 and the blade 3 is set to be an arc end surface, which increases the contact area between the partition plate 23 and the blade 3, so that the blade 3 is stressed more stably when in use, and the possibility of displacement after the blade 3 is stressed is reduced.

EXAMPLE III

Referring to fig. 7 to 10, the present embodiment provides a folding knife including a blade replacing structure, which includes a handle 1 and the blade replacing structure of any one of the above embodiments, and is characterized in that a connecting hole 26 is formed in a side of the blade holder 2 away from the blade tip, the handle 1 is pivotally connected to the blade holder 2 through a connecting nail 4, and the handle 1 is provided with a receiving groove 12. In this embodiment, the blade 3 and the blade holder 2 rotate around the connecting nail 4 to open and close, and the storage groove 12 of the handle 1 is used for storing the blade 3 and the blade holder 2 into the groove when being folded, so as to avoid the scratch of the blade edge.

Optionally, a position of the handle 1 close to the connecting nail 4 relative to one side of the blade portion is provided with a limit nail 11, an edge of one side of the blade fixing seat 2 away from the blade tip is provided with a first limit groove 27 and a second limit groove 28, the first limit groove 27 abuts against the limit nail 11 when the blade is in a fully opened state, and the second limit groove 28 abuts against the limit nail 11 when the blade is fully closed. In the embodiment, the first limit groove 27 is matched with the limit nail 11 to limit the opening angle of the blade 3, and simultaneously, the blade can be kept stable under the external force when the blade is in the opening state; the second limit groove 28 is matched with the limit nail 11 to limit the closing angle of the blade 3, meanwhile, the danger caused by the fact that the blade 3 is displaced by external force in the closing state is avoided, and the operation safety is improved.

Optionally, a second elastic sheet is disposed on a groove wall on one side of the accommodating groove, and when the blade holder 2 is located at the fully open position, one side of the second elastic sheet close to the tool nose abuts against a rear edge of the blade holder 2. The second shell fragment is used for supporting 2 trailing edges of blade fixing base, when guaranteeing that 3 backs of blade receive external force in the use, and blade 3 and blade fixing base 2 can not retrace the groove of accomodating in the handle of a knife 1 under the effect of force, produce the injury to the operating personnel who grips.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and scope of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A blade replacing structure comprises a blade (3) and a blade fixing seat (2), and is characterized in that the blade fixing seat (2) comprises a first clamping plate (21), a second clamping plate (22), a spacing plate (23) and a first elastic sheet (221), the spacing plate (23) is arranged between the first clamping plate (21) and the second clamping plate (22), and the first clamping plate (21), the second clamping plate (22) and the spacing plate (23) jointly enclose a blade embedding groove (24) for accommodating the blade (3) to be inserted;

spacing plate (23) are close to knife tip one side and are equipped with first card protruding (231), one side that blade (3) and cutting part are relative and be close to the knife tip be equipped with first card protruding (231) complex first draw-in groove (31), blade dress caulking groove (24) are close to cutting part one side and are equipped with down spacing wall (232), one side that the knife tip is close to the cutting part is kept away from to spacing wall (232) and blade (3) down offsets, spacing plate (23) are corresponding the position of first shell fragment (221) is equipped with dodges the groove, first shell fragment (221) include first end and second end, the first end and second splint (22) fixed connection of first shell fragment (221), the second end set up in blade dress caulking groove (24), second end fixedly connected with press switch (25), first shell fragment (221) are equipped with second card protruding (222) with cutting part syntropy one side, blade (3) and the one side of keeping away from the knife tip relatively be equipped with second card protruding draw-in groove (32) of second card.

2. A blade changing structure according to claim 1, wherein the partition plate (23) is integrally formed with the second clamping plate (22), and the first end of the first resilient piece (221) is fixedly connected with the second clamping plate (22) through a connecting nail (223).

3. The blade replacing structure according to claim 1, wherein the push switch (25) is a cylinder, the first clamping plate (21) is provided with an avoiding hole (211) at a position corresponding to the push switch (25), and the push switch (25) passes through the avoiding hole (211) and extends to the outside of the first clamping plate (21).

4. The blade replacing structure according to claim 1, wherein the partition plate (23) and the second clamping plate (22) are of a split structure, and are connected through a connecting nail, and the first end of the first elastic sheet (221) and the second clamping plate (22) are integrally formed.

5. A blade changing structure according to claim 4, wherein the other edge of the first resilient piece (221) is separated from the second clamping plate by an interruption groove passing through the second clamping plate (22).

6. The structure of claim 1, wherein a first end of the first resilient piece (221) is provided with a curved portion, and a second end of the first resilient piece (221) is raised in a direction of the blade relative to the second clamping plate.

7. A blade changing structure according to claim 1, wherein the first catching protrusion (231) is provided as an arc-shaped end surface near a side end surface of the blade, and an edge of the avoiding opening of the blade (3) is shaped to fit with an outer edge of the partition plate (23).

8. A folding knife, comprising a handle body (1) and a blade replacing structure as claimed in any one of the claims 1 to 6, wherein a connecting hole (26) is arranged on one side of the blade fixing seat (2) away from the knife tip, the handle body (1) is pivoted with the blade fixing seat (2) through a connecting nail (4), and the handle body (1) is provided with a containing groove (12).

9. The folding knife according to claim 8, characterized in that the handle (1) is provided with a stop pin (11) at a position close to the connecting pin (4) relative to the edge portion side, the blade holder (2) is provided with a first stop groove (27) and a second stop groove (28) at a side edge far away from the blade tip, the first stop groove (27) abuts against the stop pin (11) when the blade is in the fully opened state, and the second stop groove (28) abuts against the stop pin (11) when the blade is in the fully closed state.

10. The folding knife according to claim 9, wherein a second resilient piece is disposed on a wall of the storage groove, and when the blade holder (2) is in the fully open position, a side of the second resilient piece close to the knife point abuts against a side of the blade holder (2) away from the knife point.