CN101704250B

CN101704250B - Manual knife convenient for blade replacement

Info

Publication number: CN101704250B
Application number: CN2009103083274A
Authority: CN
Inventors: 仇建平
Original assignee: Hangzhou Great Star Industrial Co Ltd
Current assignee: Hangzhou Great Star Industrial Co Ltd
Priority date: 2009-10-15
Filing date: 2009-10-15
Publication date: 2011-12-28
Anticipated expiration: 2029-10-15
Also published as: CN101704250A

Abstract

The invention discloses a manual knife convenient for blade replacement. The blade replacement of a traditional manual blade has complicated structure, inconvenient operation and especially poor operation handfeel. The manual knife convenient for blade replacement comprises a knife rest and a blade; the knife rest is provided with a containing cavity with an opening; the blade is inserted in the containing cavity thorough the opening; and a clamping groove is arranged at the edge of the back of the blade. The manual knife convenient for blade replacement is characterized in that a lock piece which can rotate circumferentially is vertically arranged at the top of the knife rest and comprises a slide part exposed outside the knife rest and a lock part driven by the slide part and extending towards the clamping groove of the blade; and the lock part is provided with a slit. By the invention, the lock piece can rotate circumferentially within a larger range, so that an operator can accurately judge whether the lock piece is in a constraining position to the blade or in a constraint releasing position to the blade; and the manual knife convenient for blade replacement has strong operation handfeel and is convenient for blade replacement; in addition, the manual knife convenient for blade replacement omits a central spindle, a slide block, a notch and other structures of the prior art, thereby having simple and compact structure.

Description

Be convenient to change the hand knife of blade

Technical field

The present invention relates to a kind of hand knife, especially a kind of hand knife of being convenient to change blade.

Background technology

Mostly the existing hand knife that can change blade is to change blade, complex structure, operation inconvenience by plate that operation constitutes knife rest.

Also have lock piece is set on knife rest (perhaps tool rest) retrains that blade installs and change, but because of the reasons such as set-up mode of lock piece cause the scope of activities of lock piece less, be difficult to accurately hold the lock piece position when changing blade, operating handle is poor.As No. 200710031012.0 Chinese invention patent applications disclosed " changing the cutting knife of blade automatically " (publication number is CN101143447A), it is by handle of a knife 1, be arranged in the handle of a knife 1 and also can form along handle of a knife 1 tool rest 2 that slides and the blade 3 that is installed on the tool rest 2, blade 3 is installed in the mounting groove 2a of tool rest 2 sides, on blade 3, be provided with locating notch 3a, blade 3 is limited by the lock pin 6a that is positioned at locating notch 3a, the blade release of stirring lock pin 6a is installed on tool rest 2, this blade release is a runner 6, lock pin 6a is fixed on the inboard of runner 6, be provided with breach 6b in the neighboring of runner 6, lock pin 6a and breach 6b lay respectively at the central rotating shaft 6c both sides of runner 6; Be provided with spring leaf 7 in tool rest 2, a wherein end of spring leaf 7 is fixedlyed connected with tool rest 2, another free end and breach 6b crimping, and the elastic force of spring leaf 7 is limited in lock pin 6a in the locating notch 3a of blade 3; When blade 3 parts were stretched out handle 1, with the hand runner 6 that rotates backward, the elastic force that can overcome spring leaf 7 can make lock pin 6a break away from the locating notch 3a of blade 3 and discharge blade 3, at this moment blade 3 can be taken off.This technical scheme, be subjected to runner 6 to be installed in the restriction that mode on the tool rest 2 and runner 6 neighboring breach 6b cooperate with spring leaf 7 by horizontal central rotating shaft 6c, cause runner 6 slewing areas less, the operator often is difficult to the angle that accurate perception runner rotates when changing blade, therefore being difficult to control accurately lock pin 6a breaks away from or snaps in locating notch 3a on the blade 3, be difficult to promptly judge that runner is in the constrained of blade or is in the position of removing the blade constraint, operating handle is poor.200720051673.5 number Chinese utility model patent also discloses the technical scheme (Granted publication number for CN201026616Y) of " a kind of cutting knife tool rest ", it comprises tool rest body 1 and the blade 2 that is plugged in the tool rest body 1, on blade 2, be provided with locating notch 2a, upper side at tool rest body 1 is equipped with runner 3, be provided with lock pin 3a and shifting block 3b in runner 3 inboards, lock pin 3a and shifting block 3b are separately positioned on the central rotating shaft 3c both sides of runner 3, from 35 degree, the locating notch 2a on the position of lock pin 3a and the blade 2 adapts with respect to the axial connecting line downward bias of lock pin 3a and central rotating shaft 3c in the axle center of shifting block 3b; Be provided with spring leaf 4 in tool rest body 1, a wherein end of spring leaf 4 is fixedlyed connected with tool rest body 1, another free end and shifting block 3b crimping, and the elastic force of spring leaf 4 makes lock pin 3 be positioned at the locating notch 2a of blade 2.When tool rest body 1 is opened (or stretching out), press hand rotating wheel 3(35 degree that rotate backward approximately), the lock pin 3a of runner 3 inboards breaks away from the locating notch 2a on the blade 2, blade 2 is released, and can blade 2 be taken out with hand, put into new blade 2 after, loose one's grip back runner 3 under the elastic force effect of spring leaf 4, rotate forward, make lock pin 3a be positioned at the locating notch 2a on blade top, blade 2 is locked.This technical scheme is subjected to runner 3 to be installed in the restriction of position relation between mode on the tool rest body 1 and shifting block 3b, the lock pin 3a by horizontal central rotating shaft 3c, has the defective of aforementioned invention technical scheme equally.In other words, be the rotational angle that shifting block 3b, breach 6b have limited corresponding runner respectively.And above-mentioned two schemes if increase the scope that runner rotates by force, then have the anxiety of spring leaf slippage from the runner.

Summary of the invention

The technical assignment of the technical problem to be solved in the present invention and proposition is to overcome complex structure, operation inconvenience, the especially defective of operating handle difference that prior art exists, and a kind of hand knife of being convenient to change blade is provided.For this reason, the present invention is by the following technical solutions:

Be convenient to change the hand knife of blade, comprise handle of a knife, knife rest and blade, described knife rest is provided with container cavity, this container cavity has an opening, described blade is in described opening is inserted into described container cavity, the back edge of described blade is provided with draw-in groove, it is characterized in that: the lock piece that can circumferentially rotate in the vertical installation in the top of described knife rest, this lock piece comprises the lock part that stretches to described insert pocket that is exposed at the outer clicking section of knife rest and is driven by described clicking section, this lock part is avoided blade in the angular range that lock piece circumferentially rotates, and in another angular range that lock piece circumferentially rotates with blade lock.

The invention has the beneficial effects as follows:

1, the top that vertically is installed in knife rest by lock piece can circumferentially be rotated, lock piece circumferentially can rotated in the larger context, make the rotation that the operator can clear and definite perception lock piece, be that the operator can judge accurately that lock piece is in the constrained of blade or is in the position of removing the blade constraint, operating handle is strong, is easy to change blade.

2, by changing the mounting means of lock piece on knife rest, and lock part is limited to the position of the circumferential center of rotation that departs from lock piece, position by lock part concerns blade lock on knife rest or avoid blade and change so that take off blade, and structures such as central rotating shaft of the prior art, shifting block, breach have been omitted, it is simple and compact for structure, is convenient to operation.

Description of drawings

Fig. 1 is the side schematic view of hand knife of the present invention under deployed condition.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is for being equipped with the side schematic view of blade on the knife rest of hand knife of the present invention.

Fig. 4 for the A-A of Fig. 3 to a kind of view of analysing and observe.

Fig. 5 for the B-B of Fig. 4 to a kind of view of analysing and observe.

Fig. 6 for the C-C of Fig. 5 to a kind of view of analysing and observe.

Fig. 7 for the A-A of Fig. 3 to the another kind of view of analysing and observe.

Fig. 8 for the B-B of Fig. 4 to the another kind of view of analysing and observe.

Fig. 9 for the C-C of Fig. 5 to the another kind of view of analysing and observe.

Figure 10 is the I portion enlarged drawing of Fig. 4.

Figure 11 is the II portion enlarged drawing of Fig. 5.

Figure 12 is the III portion enlarged drawing of Fig. 6.

Figure 13 is the IV portion enlarged drawing of Fig. 7.

Figure 14 is the V portion enlarged drawing of Fig. 8.

Figure 15 is the VI portion enlarged drawing of Fig. 9.

Number in the figure explanation: 1-handle of a knife, 2-knife rest, 3-blade, 4-pivot, the 5-container cavity, 6-opening, 7-draw-in groove, 8-lock piece, the 9-clicking section, 10-lock part, 11-slit, 12-flexible member, the 13-accommodation section, 14-reference column, 15-through hole, the 16-neck, 17A, 17B-plate, 18A, 18B-limiting section, the 19-cover plate, 20-screw, 21-fastener.

The specific embodiment

The present invention will be further described below in conjunction with Figure of description.

Fig. 1,2,3, hand knife shown in 4, comprise handle of a knife 1, knife rest 2 and blade 3, knife rest 2 is connected on the handle of a knife 1 by pivot 4, knife rest 2 is provided with container cavity 5, this container cavity 5 has an opening 6, blade 3 is in opening 6 is inserted into container cavity 5, the back edge of blade 3 is provided with draw-in groove 7(referring to Fig. 5, Fig. 8), the lock piece 8(that the vertical installation in the top of knife rest 2 can circumferentially be rotated circumferentially rotates and be meant that lock piece rotates with respect to knife rest 2 just as rotating shaft is the same on knife rest 2), this lock piece 8 comprises clicking section 9 that is exposed at outside the knife rest 2 and the lock part that stretches to insert pocket 7 10 that is driven by clicking section 9, this lock part 10 is avoided blade in the angular ranges that lock piece 8 circumferentially rotates, and in another angular ranges that lock piece 8 circumferentially rotates with blade lock (referring to Fig. 5, Fig. 9, Figure 11, Figure 15).Therefore, when dialing to lock piece 8 as Fig. 8, Fig. 9, Figure 14, state shown in Figure 15 by clicking section 9, the lock part of lock piece departs from insert pocket 7, blade does not retrain, blade 3 can be extracted in the container cavity 5 of knife rest easily, perhaps with blade in opening is inserted into container cavity; When dialing to lock piece as Fig. 5, Fig. 6, Figure 11, state shown in Figure 12 by clicking section 9, the lock part 10 of lock piece 8 is positioned at insert pocket 7, and restriction blade 3 is extracted in the container cavity 5 of knife rest, therefore, can safety carry out work.Above-mentioned realization blade locking and the lock piece of changing, it is simple in structure, easy to operate, can in 90 ° of scopes, rotate, therefore when changing blade, make the rotation that the operator can clear and definite perception lock piece, be that the operator can judge accurately that lock piece is in the constrained of blade or is in the position of removing the blade constraint, operating handle is strong, is easy to change blade.By the rotation of above-mentioned lock piece 8, can determine that lock part 10 is avoided the angular range of blade and with the angular range of blade lock.General, for fear of the blade accidental, the angular range of avoiding blade is less than the angular range with blade lock.

Further, the present invention also comprises following additional technology contents:

Described lock part 10 departs from the circumferential center of rotation of lock piece 8, so that change the position of lock part 10 phase blade when rotating lock piece 8.Further, lock part 10 is two and is the semiaxis shape, is that slit 11(is referring to Fig. 5, Fig. 9, Figure 11, Figure 15 between two lock parts 10).At this moment, by changing that slit 11 can realize with respect to the position of blade that lock part 10 is avoided blade or with blade lock: when dialing to lock piece 8 as Fig. 8, Fig. 9, Figure 14, state shown in Figure 15 by clicking section 9, the direction of slit 11 is consistent with the bearing of trend of blade 3, even this moment, the lock part 10 of lock piece was positioned at insert pocket 7, but blade does not retrain, blade 3 can be extracted in the container cavity 5 of knife rest easily, perhaps with blade in opening is inserted into container cavity; When dialing to lock piece as Fig. 5, Fig. 6, Figure 11, state shown in Figure 12 by clicking section 9, the bearing of trend of the direction of slit 11 and blade 3 staggers, this moment, the lock part 10 of lock piece 8 was positioned at insert pocket 7, restriction blade 3 is extracted in the container cavity 5 of knife rest, therefore, can safety carry out work.The existence of this slit 11, the angle that makes lock part 10 avoid blade reduce and the angle of blade lock are increased, and effectively avoid the blade accidental, guarantee safe in utilization.

As Fig. 4, Fig. 7, Figure 10, shown in Figure 13, lock piece 8 vertically is installed on the knife rest 2 according to the mode of rotating around its center line; Lock piece 8 upper supports have elastic component 12, and flexible member 12 supports lock piece 8 to the position of lock part 10 with blade lock, make that thus always limiting blade under the normality is extracted in the container cavity of knife rest, with the work of carrying out of safety.

Flexible member 12 can be for being enclosed within the torque spring on the lock piece 8, and the two ends of this torque spring are supported on respectively on lock piece 8 and the knife rest 2, and torque spring can not break away from the operating position yet when the characteristic of dependence torque spring was rotated lock piece in the larger context.Further, lock piece 8 is provided with two location divisions that cooperate with torque spring, thus by determining lock piece 8 residing positions with the location that cooperates of spring, concrete, the reference column 14 that has an accommodation section 13 on the lock piece 8 and be positioned at 13 centres, accommodation section, torque spring is enclosed within on the reference column 14, one end of torque spring is supported on the lock piece 8, the other end of torque spring passes the through hole of being located on the lock piece 8 15 and is supported on the knife rest 2, described two end walls that the location division is a through hole 15, this is simple and compact for structure, be easy to assembling, especially can limit the angle that lock piece 8 rotates by the angle of setting through hole 15 on the lock piece, so can the elastic force of torque spring order lock piece turn to torque spring when conflicting a end wall at through hole (referring to Fig. 4, Figure 10) just as Fig. 5, Fig. 6, Figure 11, the direction of slit 11 and the bearing of trend of blade 3 of making shown in Figure 12 staggers, with the work of carrying out of safety; And when lock piece 8 be turned to torque spring when conflicting another end wall at through hole (referring to Fig. 7, Figure 13) just as Fig. 8, Fig. 9, Figure 14, the direction of slit 11 that makes shown in Figure 15 consistent with the bearing of trend of blade 3, with the replacing blade (in Figure 10,13 respectively with arrow expressed lock piece in the relevant position rotating direction).As location, can also the location division that cooperatively interact be set on lock piece 8 and knife rest 2 and realize lock piece 8.In order to protect torque spring and to make lock piece complete in appearance, on reference column 14, connect a lid and establish the cover plate 19 of accommodation section 13 by screw 20.

Clicking section 9, lock part 10 are structure as a whole, and lock piece 8 vertically is installed in the position of corresponding insert pocket 7 on the knife rest 2.Lock piece 8 has neck 16, knife rest 2 fixedly forms by two

plate

17A, 17B are superimposed, two

plate

17A, 17B are provided with to be and encircle limiting section 18A, the 18B that shape is fastened on neck 16, this structure is when assembling, earlier lock piece is assemblied on two plates, gets final product in that two plates are fixed together afterwards.

In addition, for the ease of carrying, on handle of a knife, be connected with fastener 21 with can clamping or hang over suitable position.

Said structure has been addressed knife rest 2 and has been connected structure on the handle of a knife 1 by pivot 4, but from the technical problem to be solved in the present invention, knife rest 2 does not influence the basic realization of conceiving of the present invention with the syndeton of handle of a knife 1, therefore, knife rest 2 can be to fixedly connected or other version with handle of a knife 1.

Claims

1. be convenient to change the hand knife of blade, comprise handle of a knife (1), knife rest (2) and blade (3), described knife rest (2) is provided with container cavity (5), this container cavity (5) has an opening (6), described blade (3) is in described opening (6) is inserted into described container cavity (5), the back edge of described blade (3) is provided with draw-in groove (7), it is characterized in that: the lock piece (8) that can circumferentially rotate in the vertical installation in the top of described knife rest (2), this lock piece (8) comprises the lock part that stretches to described insert pocket (7) (10) that is exposed at the outer clicking section (9) of knife rest (2) and is driven by described clicking section (9), this lock part (10) is avoided blade in the angular range that lock piece (8) circumferentially rotates, and in another angular range that lock piece (8) circumferentially rotates with blade lock.

2. the hand knife of being convenient to change blade according to claim 1 is characterized in that described lock part (10) departs from the circumferential center of rotation of described lock piece (8).

3. the hand knife of being convenient to change blade according to claim 2 is characterized in that described lock part (10) is that two and two lock parts all are the semiaxis shape, is slit (11) between two lock parts (10).

4. according to each described hand knife of being convenient to change blade among the claim 1-3, it is characterized in that described lock piece (8) upper support have elastic component (12).

5. the hand knife of being convenient to change blade according to claim 4 is characterized in that described flexible member (12) supports described lock piece (8) to the position of described lock part (10) with blade lock.

6. the hand knife of being convenient to change blade according to claim 4, it is characterized in that described flexible member (12) for being enclosed within the torque spring on the described lock piece (8), the two ends of this torque spring are supported on respectively on described lock piece (8) and the knife rest (2).

7. the hand knife of being convenient to change blade according to claim 6 is characterized in that described lock piece (8) is provided with two location divisions that cooperate with described torque spring.

8. the hand knife of being convenient to change blade according to claim 7, it is characterized in that having an accommodation section (13) on the described lock piece (8) and be positioned at the middle reference column (14) in accommodation section (13), described torque spring is enclosed within on the described reference column (14), one end of described torque spring is supported on the described lock piece (8), its other end passes the through hole of being located on the described lock piece (8) (15) and is supported on the described knife rest (2), described two end walls that the location division is described through hole (15).

9. the hand knife of being convenient to change blade according to claim 1 is characterized in that described clicking section (9), lock part (10) are structure as a whole, and described lock piece (8) is installed in the position that knife rest (2) is gone up corresponding described insert pocket (7).

10. according to claim 1 or the 9 described hand knifes of being convenient to change blade, it is characterized in that described lock piece (8) has neck (16), described knife rest (2) fixedly forms by two plates (17A, 17B) are superimposed, and two plates (17A, 17B) are provided with the limiting section (18A, 18B) that is fastened on described neck (16).