CN205111889U - Helping hand folding knife - Google Patents

Abstract

The utility model discloses a helping hand folding knife belongs to the hand knife, and current folding knife one -hand operation is smooth and easy inadequately when expanding the handle of a knife, the utility model discloses a handle of a knife, the cutter body, the pivot, the handle of a knife includes the first handle body, the second handle body and formation are at the first handle body, holding tank between the second handle body, the first end position of pivot is on the first handle body, the second end position of pivot is on the second handle body, the middle part of pivot wears to make at the afterbody of cutter body that the cutter body is collapsible to launch to the holding tank or from the holding tank, the effect has the helping hand spring on the cutter body, the helping hand spring is exerted from the elasticity of holding tank expansion the cutter body when the cutter body is folded to the holding tank. Provide the helping hand when expanding the cutter body, do benefit to one -hand operation, and for for the purpose of the safety, the ability of giving this folding knife locking to maloperation or accident are opened the cutter body and are caused the injury or constitute the potential safety hazard.

Description

Assist folding knife

Technical field

The utility model belongs to hand knife, specifically a kind of assist folding knife launching cutter hub by elastic force.

Background technology

By pivot cutter hub is assemblied in the jackknife on handle of a knife, (launch or fold) during use and usually need two hand operateds, namely a hand grips handle of a knife, another hand grips cutter hub and operates, so, user has no time to carry out other operation with hand, and when user only can vacate a hand, will be difficult to operate this jackknife (especially launching the operation of cutter hub).

Can operate jackknife to realize a hand, some products set up pulling part on cutter hub, and during use, a hand grips handle of a knife, and stirs pulling part and deployable cutter hub with indivedual fingers (as thumb) of this hand to expansion direction.But, because to assemble or the reason of respective outer side edges exists resistance when launching cutter hub more between the cutter hub of prior art and handle of a knife, smooth and easy not when causing one-handed performance to launch handle of a knife.

Utility model content

The technical assignment of the technical problems to be solved in the utility model and proposition is inadequate defect smoothly when overcoming existing jackknife one-handed performance expansion handle of a knife, providing a kind of assist folding knife, to provide power-assisted when launching cutter hub, being beneficial to one-handed performance; And for the sake of security, give the ability of this jackknife locking, in order to avoid maloperation or unexpected cutter hub of opening damage or form potential safety hazard.

For achieving the above object, assist folding knife of the present utility model, comprise handle of a knife, cutter hub, pivot, described handle of a knife comprises the first handle body, second handle body and be formed in described first handle body, holding tank between second handle body, the first end of described pivot is positioned on the first described handle body, second end of described pivot is positioned on the second described handle body, the afterbody that the middle part of described pivot is through described cutter hub makes described cutter hub be foldable to described holding tank or launches from holding tank, it is characterized in that: on described cutter hub, effect has power assistant spring, described power assistant spring applies the elastic force launched from holding tank to cutter hub when described cutter hub is folded to holding tank.

As optimization technique means: described power assistant spring is helical torsion springs, one end of this helical torsion springs acts on described cutter hub also can rotate with described cutter hub.

As optimization technique means: the second described handle body has the second inner frame and covers the second cover plate outside described second inner frame, the second described cover plate is provided with the counterbore towards described second inner frame, the second described inner frame is provided with the second movable span, described helical torsion springs is positioned at described counterbore, and one end of described helical torsion springs acts on described cutter hub through the second described movable span, its other end is supported on the second described cover plate.

As optimization technique means: described counterbore is through hole, the second end of described pivot is positioned at the inner side of described second cover plate, and the outside of described second cover plate is equipped with elastic clip, and described through hole covers by described elastic clip.

As optimization technique means: be provided with resistance piece between described first handle body, the second handle body, when described cutter hub is folded to described holding tank, this resistance piece applies the elastic force stoping cutter hub to launch from holding tank to described cutter hub.

As optimization technique means: the afterbody of described cutter hub is provided with outstanding stress point, resistance piece described in when described cutter hub is folded to described holding tank is resisted against on described stress point, and the resistance piece described in the process that described cutter hub launches from holding tank leaves the afterbody of described cutter hub.

As optimization technique means: described resistance piece is the elastic structure made from described first handle body or the second handle body.

As optimization technique means: the tail end of described cutter hub is provided with the backing pin stretching to side direction, described handle of a knife is provided with slip dead bolt, described slip dead bolt is provided with push button, described push button extends outside described handle of a knife, and the backing pin that the slip dead bolt described in when described cutter hub is folded to described holding tank can be pushed ahead described in stop rotates to the direction that cutter hub launches.

As optimization technique means: the first described handle body has the first inner frame and covers the first cover plate outside described first inner frame, described slip dead bolt is assemblied between the first described inner frame and the first cover plate, the first described inner frame is provided with the first movable span, described backing pin extends the first described inner frame and the first cover plate through the first described movable span, the slide opening extended before and after the first described cover plate is provided with, described push button extends the outside of described first cover plate through described slide opening.

As optimization technique means: the inner side of described first cover plate is provided with chute, described slip dead bolt is positioned at described chute and is directed to.

As optimization technique means: the inner side of described first cover plate is provided with the loose slot of the end activity for described backing pin.

As optimization technique means: described slip dead bolt is provided with jerk-finger, and described jerk-finger is provided with locator protrusions, the first described inner frame is provided with locating slot, and described locator protrusions sinks into locate described slip dead bolt in described locating slot.

As optimization technique means: the first described handle body has the first inner frame, the second described handle body has the second inner frame, the first described inner frame and the second inner frame are connected as a single entity via ridge, and described resistance piece is be positioned at described ridge and the en plaque elastic structure extended forward.

As optimization technique means: described ridge comprises two bridge plates connecting described first inner frame and the second inner frame, and described resistance piece is between described two bridge plates.

As optimization technique means: described cutter hub is independently blade.

As optimization technique means: described cutter hub comprises knife rest and is assemblied in the detachable blade on described knife rest.

The beneficial effects of the utility model are: by acting on power assistant spring on cutter hub, and power assistant spring applies the elastic force launched from holding tank to cutter hub when cutter hub is folded to holding tank, providing power-assisted, being beneficial to one-handed performance when launching cutter hub.And for the sake of security, give the ability of this jackknife locking, in order to avoid maloperation or unexpected cutter hub of opening damage or form potential safety hazard.

Accompanying drawing explanation

Schematic diagram when Figure 1A is the cutter hub expansion of the utility model assist folding knife;

Figure 1B is the top view of Figure 1A;

Fig. 2 A is the schematic diagram after the first cover plate, the second cover plate, elastic clip in Figure 1A being removed;

Fig. 2 B is the top view of Fig. 2 A;

Fig. 2 C is the schematic diagram of structured rear surface shown in Fig. 2 A;

Fig. 3 is the schematic diagram after being removed by helical torsion springs in Fig. 2 C;

Schematic diagram after the cutter hub that Fig. 4 is structure shown in Fig. 2 A folds;

Fig. 5 A is the schematic diagram of the utility model first cover plate;

Fig. 5 B is the schematic diagram of structured rear surface shown in Fig. 5 A;

Fig. 6 A be the utility model be connected as a single entity the first inner frame, the first inner frame schematic diagram;

Fig. 6 B is that the K-K of Fig. 6 A is to sectional view;

Fig. 6 C is the top view of Fig. 6 A;

The top view (schematic diagram of structured rear surface shown in Fig. 6 A) that Fig. 6 D is Fig. 6 C;

Fig. 7 A is the schematic diagram of the utility model second cover plate;

Fig. 7 B is the schematic diagram of structured rear surface shown in Fig. 7 A;

Fig. 8 is the schematic diagram of a kind of cutter hub of the utility model;

Fig. 9 A be of the present utility model be assembled together dead bolt, push button schematic diagram;

Fig. 9 B is the top view of Fig. 9 A;

Figure 10 is the schematic diagram of the utility model elastic force jam plate;

Figure 11 is the schematic diagram of the utility model elastic clip;

Number in the figure illustrates:

01-handle of a knife:

11-first handle body: 111-first inner frame, 112-first cover plate, 113-first movable span, 114-locating slot, 115-slide opening, 116-chute, 117-loose slot;

12-second handle body: 121-second inner frame, 122-second cover plate, 123-second movable span, 124-counterbore, 125-slit groove;

13-holding tank;

14-resistance piece;

15-elastic force jam plate, 151-salient point;

16-alignment pin;

17-slip dead bolt, 171-jerk-finger, 172-locator protrusions;

18-push button;

19-division board;

110-ridge;

120-bridge plate;

02-cutter hub: 21-stress point, 22-backing pin, 23-pulling part, 24-axis hole, 25-jack;

03-pivot;

04-power assistant spring;

05-elastic clip.

Detailed description of the invention

Below in conjunction with Figure of description, the utility model is described further.

As seen in figs. 1 a-1b, assist folding knife of the present utility model comprises handle of a knife 01, cutter hub 02, pivot 03, handle of a knife 01 comprises the first handle body 11, second handle body 12 and be formed in the first handle body 11, holding tank 13(between second handle body 12 is see Fig. 6 B, in order to form this holding tank, the first general handle body, be equipped with as Figure 1B between second handle body, division board 19 shown in Fig. 2 B or separation sleeve, with securing member if the screw of docking is by the first handle body, when second handle body is fastening, securing member compresses division board or separation sleeve while fastening for two handle bodies, being made between two handle bodies by tight division board or separation sleeve keeps spacing to form holding tank, separation sleeve is generally enclosed within securing member), the first end of pivot 03 is positioned on the first handle body 11 and is supported, second end of pivot 03 is positioned at the (first end of pivot described herein that the second handle body 12 is supported, second end is only the demand of expression and defines, therebetween there is no concrete differentiation), common, pivot 03 docks (as being threaded connection) by two sections of axis bodies to form, it also can be the structure of other form during concrete enforcement, the middle part of pivot is through the afterbody of cutter hub (see Fig. 8, afterbody is provided with the axis hole 24 passed for pivot) make cutter hub 02 be foldable to holding tank 13(see Fig. 4) or launch (see Figure 1A-1B from holding tank, Fig. 2 A-2C, Fig. 3), on cutter hub 02, effect has power assistant spring 04(see Fig. 2 B-2C), power assistant spring 04 when cutter hub is folded to holding tank (see Fig. 4) applies the elastic force launched from holding tank to cutter hub.Structure accordingly, when launching cutter hub, power assistant spring provides power-assisted, needn't exert a force, both be beneficial to one-handed performance, and cutter hub action in expansion process is smooth and easy, can not be blocked at whole expansion process to cutter hub.

As improving further and supplementing technique scheme, the utility model also comprises following additional technical characteristic, although diagram contains following relevant additional technical feature and forms preferred embodiment of the present utility model, but the utility model is not limited to this situation, they are selected in the technical scheme described in epimere according to concrete effect when implementing the utility model.

First, for the ease of assembling, make compact conformation, power assistant spring 04 is helical torsion springs (see Fig. 2 B-2C), and one end of this helical torsion springs acts on cutter hub 02 also can rotate with cutter hub.Concrete, see Fig. 3, Fig. 8, be provided with jack 25 at the afterbody of cutter hub 02, one end of helical torsion springs extends in this hole and elastic force is applied to cutter hub.

Further, second handle body 12 has the second inner frame 121 and covers in second cover plate 122(the utility model outside the second inner frame, when relating to outside or the inner side of parts, outside refers to the side of these parts away from holding tank, inner side refers to the side of these parts close to holding tank), second cover plate 122 is provided with towards the counterbore 124(of the second inner frame 121 see Fig. 7 A-7B), second inner frame 121 is provided with the second movable span 123(of arc see Fig. 3, Fig. 6 D), helical torsion springs is positioned at counterbore 124, one end of helical torsion springs acts on cutter hub through the second movable span 123, its other end is supported on the second cover plate 122 (see Fig. 7 B, second cover plate is provided with slit groove 125, this end of helical torsion springs is positioned at slit groove).

Depending on concrete structure requirement, described counterbore can be stepped hole, also can be isometrical hole, can be through hole, also can be blind hole.Based on the version of counterbore, following several assembly structure can be had:

A kind of structure is: counterbore is blind hole, and the second end of pivot is positioned at the inner side of the second cover plate and is covered by the second cover plate.On this basis, the outside of the second cover plate is equipped with elastic clip with Portable belt;

The second is structure: counterbore is through hole, and the second end of pivot is positioned at the outside of the second cover plate and is covered by through hole.On this basis, the outside of the second cover plate is equipped with elastic clip with Portable belt, elastic clip offers the through hole of corresponding pivot, is convenient to assemble pivot by this through hole;

The third is structure: counterbore 124 is through hole (see Fig. 7 A-7B), and the second end of pivot 03 is positioned at the inner side of the second cover plate 122, and the outside of the second cover plate 122 is equipped with elastic clip 05(see Figure 1B, Figure 11), through hole covers by elastic clip 05.

General, helical torsion springs and pivot coaxially assemble, and because helical torsion springs is positioned at counterbore, the form that helical torsion springs and pivot coaxially assemble can embody from the corresponding relation of counterbore and pivot.

In order to avoid cutter hub folded state launches by the effect of power assistant spring, resistance piece 14(is provided with see Figure 1B, 2B, 6C) between first handle body 11, second handle body 12, when cutter hub is folded to holding tank, this resistance piece 14 pairs of cutter hubs apply the elastic force stoping cutter hubs to launch from holding tank, in order to offset the elastic force (see Fig. 4) of power assistant spring 04.

Concrete, the afterbody of cutter hub 02 is provided with outstanding stress point 21(see Fig. 8), when cutter hub is folded to holding tank as shown in Figure 4, resistance piece 14 is resisted against on stress point 21, the resistance that the afterbody that cutter hub resistance piece from the process that holding tank launches leaves cutter hub launches to reduce cutter hub.

Concrete, resistance piece can be the rigid member be assemblied between the first handle body, the second handle body, on resistance piece, effect has elastic component (resistance piece of this structure can with reference to the locking bar shown in Fig. 1, Fig. 2 in patent document CN201095111Y, the flexible member of this structure can with reference to the support spring shown in Fig. 1, Fig. 2 in patent document CN201095111Y).Further, the end of resistance piece is provided with latch hook (can with reference to the snap close shown in Fig. 1, Fig. 2 in patent document CN201095111Y), the afterbody of cutter hub is provided with locked groove (can with reference to the locating slot shown in Fig. 1, Fig. 2 in patent document CN201095111Y), when cutter hub launches, latch hook is positioned at locked groove, in order to lock cutter hub, cutter hub is avoided surprisingly to fold.

As a kind of desirable structure, resistance piece 14 is for being assemblied in the spring element between the first handle body, the second handle body, or be the elastic structure (see Fig. 6 C) made from the first handle body 11 or the second handle body 12, be illustrated as and be made as one with the first inner frame 111, second inner frame 121.

In order to lock cutter hub after cutter hub launches, cutter hub is avoided surprisingly to fold, can as Figure 1A, Fig. 2 A, Fig. 3 be shown in holding tank 13 be provided with can the elastic force jam plate 15(of lateral deformation see Figure 10), when cutter hub is folded to holding tank as shown in Figure 4, elastic force jam plate 15 is positioned at the side of cutter hub, and the afterbody that after cutter hub launches from holding tank as illustrated in figures 1 a-3, the front end of elastic force jam plate 15 is resisted against cutter hub stops cutter hub to fold to holding tank.During for folding cutter hub, need now elastic force jam plate 15 be pushed open to side, more folding cutter hub of taking advantage of a situation.During manufacture, elastic force jam plate can be the independent parts be assemblied between the first handle body, the second handle body, also can be the structure of making from the first handle body or the second handle body.Because handle of a knife is divided into two parts by holding tank, and cutter hub when being folded to holding tank elastic force jam plate be positioned at the side of cutter hub, therefore this elastic force jam plate is usually used as the component part of the first handle body or the second handle body, with regard to the utility model, elastic force jam plate 15 shown in Figure 10 and the second inner frame 121 are assemblied in the part that a plane constitutes the second handle body, and in order to strengthen assembly structure, elastic force jam plate 15 is locked in together with coordinating of groove by hook with the second inner frame.Obvious, elastic force jam plate also integrally can manufacture with the first inner frame, the second inner frame.

In order to locate cutter hub when cutter hub launches, formed the support of cutter hub so that cutting object when especially using, alignment pin 16(is connected with see Figure 1B between first handle body 11 and the second handle body 12), cutter hub launches its afterbody rear from holding tank and relies on alignment pin.

Launch in the process of cutter hub, in order to reduce elastic force jam plate tool setting body resistance, the side, front end of elastic force jam plate 15 is provided with salient point 151(see Figure 10, Fig. 2 C, Fig. 3), when elastic force jam plate 15 is positioned at the side of cutter hub, (being folded to the state of holding tank see Fig. 4 cutter hub) bump contacts is in the side of cutter hub afterbody, due to salient point and cutter hub contact area little, therefore launch cutter hub time the resistance of cutter hub is reduced.

Because the utility model obtains power-assisted when launching cutter hub, because this increasing the risk that cutter hub surprisingly launches, in order to avoid this risk, the tail end of cutter hub be provided with stretch to side direction backing pin 22(see Fig. 2 A-2B, Fig. 4), handle of a knife is provided with slip dead bolt 17, slip dead bolt 17 is provided with push button 18(see Fig. 2 A, Fig. 4), push button 18 extends outside handle of a knife 01, and when cutter hub is folded to holding tank, slip dead bolt 17 can be pushed ahead and be stopped that backing pin 22 is to the direction rotation that cutter hub launches.So even if cutter hub obtains power-assisted, but bolt blocks backing pin provides safety guarantee for surprisingly launching cutter hub.

For making compact conformation, first handle body 11 has the first inner frame 111 and covers the first cover plate 112 outside the first inner frame, slip dead bolt 17 is assemblied between the first inner frame 111 and the first cover plate 112 (see Figure 1A, Fig. 2 A, Fig. 4), first inner frame 111 is provided with the first movable span 113(of arc see Fig. 2 A, Fig. 4), backing pin 22 extends the first inner frame 111 and the first cover plate 112 through the first movable span 113, the slide opening 115(extended before and after first cover plate 112 is provided with is see Fig. 5 A, Fig. 5 B), push button 18 extends the outside of the first cover plate 112 to operate through slide opening 115.

Further, the inner side of the first cover plate 112 is provided with chute 116(see Fig. 5 B), slip dead bolt 17 is positioned at chute 116 and is directed to, and therefore can slide at fore-and-aft direction (shown in Figure 1A left and right directions) flexibly.

Can stop backing pin in order to ensure dead bolt, backing pin should have enough length, so the loose slot 117(of end activity be provided with in the inner side of the first cover plate for backing pin is see Fig. 5 B).

In order to slip dead bolt being positioned at corresponding position, slip dead bolt 17 is provided with jerk-finger 171, jerk-finger 171 is provided with locator protrusions 172(see Fig. 9 A, 9B), first inner frame 111 is provided with locating slot 114(see Fig. 6 A), locator protrusions 172 sinks into locate slip dead bolt in locating slot 114.So, when cutter hub folds (see Fig. 4), slip dead bolt 17 stops backing pin 22, and locator protrusions 172 sinks in the locating slot in left side; When launching cutter hub, dead bolt must be removed and not stop backing pin, so locator protrusions sinks into the locating slot interior (see Fig. 2 A) on right side, slip dead bolt be located.

As previously mentioned, the first cover plate that first handle body 11 has the first inner frame 111 and covers outside the first inner frame, the second cover plate that second handle body 12 has the second inner frame 121 and covers outside the second inner frame, first inner frame 111 and the second inner frame 121 are connected as a single entity (see Fig. 6 A-6D) via ridge 110, resistance piece 14 is for being positioned at ridge 110 and the en plaque elastic structure extended forward, and this structure can make two inner frames have better rigidity.In order to obtain the compact resistance piece of portable construction, ridge 110 comprises two bridge plate 120(of connection first inner frame 111 and the second inner frame 121 see Fig. 6 A, Fig. 6 C), resistance piece 14 two bridge plates 120 between.

For the ease of launching cutter hub, cutter hub is provided with pulling part 23.

And as the concrete form of cutter hub, cutter hub can be independently blade (see Fig. 8), and cutter hub also can comprise knife rest and be assemblied in the detachable blade (see the knife rest in patent document CN201095111Y, blade) on knife rest.

Claims (16)

1. assist folding knife, comprise handle of a knife (01), cutter hub (02), pivot (03), described handle of a knife (01) comprises the first handle body (11), second handle body (12) and be formed in described first handle body, holding tank (13) between second handle body, the first end of described pivot (03) is positioned on the first described handle body (11), second end of described pivot (03) is positioned on the second described handle body (12), the afterbody that the middle part of described pivot (03) is through described cutter hub (02) makes described cutter hub be foldable to described holding tank or launches from holding tank, it is characterized in that: the upper effect of described cutter hub (02) has power assistant spring (04), described power assistant spring (04) applies the elastic force launched from holding tank to cutter hub when described cutter hub (02) is folded to holding tank (13).

2. assist folding knife according to claim 1, is characterized in that: described power assistant spring (04) is helical torsion springs, and one end of this helical torsion springs acts on described cutter hub also can rotate with described cutter hub.

3. assist folding knife according to claim 2, it is characterized in that: the second described handle body (12) has the second inner frame (121) and covers the second cover plate (122) outside described second inner frame, described the second cover plate (122) is provided with the counterbore (124) towards described second inner frame (121), described the second inner frame (121) is provided with the second movable span (123), described helical torsion springs is positioned at described counterbore (124), one end of described helical torsion springs acts on described cutter hub (02) through described the second movable span (123), its other end is supported on described the second cover plate (122).

4. assist folding knife according to claim 3, it is characterized in that: described counterbore (124) is through hole, second end of described pivot (03) is positioned at the inner side of described second cover plate (122), the outside of described second cover plate (122) is equipped with elastic clip (05), and described through hole covers by described elastic clip (05).

5. assist folding knife according to claim 1, it is characterized in that: be provided with resistance piece (14) between described first handle body (11), the second handle body (12), when described cutter hub (02) is folded to described holding tank, this resistance piece (14) applies the elastic force stoping cutter hub to launch from holding tank to described cutter hub (02).

6. assist folding knife according to claim 5, it is characterized in that: the afterbody of described cutter hub (02) is provided with outstanding stress point (21), resistance piece (14) described in when described cutter hub is folded to described holding tank is resisted against on described stress point (21), and the resistance piece described in the process that described cutter hub launches from holding tank leaves the afterbody of described cutter hub.

7. assist folding knife according to claim 5, is characterized in that: described resistance piece (14) is the elastic structure made from described first handle body or the second handle body.

8. assist folding knife according to claim 1, it is characterized in that: the tail end of described cutter hub (02) is provided with the backing pin (22) stretching to side direction, described handle of a knife (01) is provided with slip dead bolt (17), described slip dead bolt (17) is provided with push button (18), described push button (18) extends described handle of a knife (01) outward, and the backing pin (22) that the slip dead bolt (17) described in when described cutter hub (02) is folded to described holding tank can be pushed ahead described in stop rotates to the direction that cutter hub launches.

9. assist folding knife according to claim 8, it is characterized in that: the first described handle body (11) has the first inner frame (111) and covers the first cover plate (112) outside described first inner frame, described slip dead bolt (17) is assemblied between described the first inner frame (111) and the first cover plate (112), described the first inner frame (111) is provided with the first movable span (113), described backing pin (22) extends described the first inner frame (111) and the first cover plate (112) through described the first movable span (113), the slide opening (115) extended before and after described the first cover plate (112) is provided with, described push button (18) extends the outside of described first cover plate (112) through described slide opening (115).

10. assist folding knife according to claim 9, is characterized in that: the inner side of described first cover plate (112) is provided with chute (116), and described slip dead bolt (17) is positioned at described chute (116) and is directed to.

11. assist folding knife according to claim 9, is characterized in that: the inner side of described first cover plate (112) is provided with the loose slot (117) of the end activity for described backing pin (22).

12. assist folding knife according to claim 9, it is characterized in that: described slip dead bolt (17) is provided with jerk-finger (171), described jerk-finger (171) is provided with locator protrusions (172), described the first inner frame (111) is provided with locating slot (114), and described locator protrusions (172) sinks into locate described slip dead bolt (17) in described locating slot (114).

13. assist folding knife according to claim 5, it is characterized in that: the first described handle body has the first inner frame, the second described handle body has the second inner frame, described the first inner frame (111) and the second inner frame (121) are connected as a single entity via ridge (110), and described resistance piece (14) is for being positioned at described ridge (110) and the en plaque elastic structure extended forward.

14. assist folding knife according to claim 13, it is characterized in that: described ridge (110) comprises two bridge plates (120) connecting described first inner frame (111) and the second inner frame (121), and described resistance piece (14) is positioned between two described bridge plates (120).

15. assist folding knife according to claim 1, is characterized in that: described cutter hub is independently blade.

16. assist folding knife according to claim 1, is characterized in that: described cutter hub comprises knife rest and is assemblied in the detachable blade on described knife rest.