CN212218548U

CN212218548U - Folding knife

Info

Publication number: CN212218548U
Application number: CN202021760641.4U
Authority: CN
Inventors: 蔡业鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-09
Filing date: 2020-08-21
Publication date: 2020-12-25
Anticipated expiration: 2030-08-21
Also published as: WO2022007155A1; CN111958643A

Abstract

The utility model discloses a folding knife, including the handle of a knife, blade and assist drive device, the blade is articulated with the handle of a knife through first connection nail, the blade can rotate relative handle of a knife and open and fold, assist drive device includes first transfer line, second transfer line and elastic arm, the front end of first transfer line is articulated with the blade through second connection nail, the middle part of second transfer line is articulated with the handle of a knife, and one end of second transfer line is articulated with first transfer line rear end through third connection nail, the other end is connected with the free end of elastic arm, when the blade is in fold condition to opening direction operation, the central point of second connection nail is before the central line through first connection nail and third connection nail, assist drive device provides the helping hand effect to folding direction, avoid the blade to open in fold condition accident; and after the central point of the second connecting nail passes through the central connecting line of the first connecting nail and the third connecting nail, the power assisting mechanism provides power assisting effect for the blade in the opening direction, and the blade is convenient and labor-saving to open.

Description

Folding knife

Technical Field

The utility model belongs to the technical field of the cutter, concretely relates to folding knife.

Background

The existing folding knife generally comprises a knife handle and a blade hinged with the knife handle, and the blade can rotate relative to the knife handle to be opened and folded, so that the blade can be folded when the knife is not used, and the folding knife is safe to use and convenient to carry.

The conventional folding knife is generally provided with a mechanism for maintaining a folded state of the blade, based on a safety design, in order to prevent the blade from being accidentally opened in the folded state. Traditional folding knife, handle body back are equipped with the back spring that presses with the blade afterbody and support, and the afterbody of blade is provided with the arc surface and presses and supports the plane, and when the blade was folded, the back spring was contradicted with pressing and supporting the plane, and when the blade was opened, need overcome the back spring and apply for the planar resistance of mortgage, when rotating back spring and arc surface mortgage, the blade could be more smooth and easy continuation open. This kind of structure, back of the body spring is applyed and is very big for pressing to planar elasticity, will open the blade, need hold between the fingers the blade and exert very big effort to opening the direction and just can open the blade smoothly, and the operation of opening of blade is more hard, and when the blade rotated to arc surface and back of the body spring mortgage, back of the body spring also can't open for the blade and provide supplementary helping hand, and the blade is opened the difficulty.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the above technical problems, and aims to provide a folding knife which is safe and labor-saving and can provide assistance to the opening and folding directions of the blade.

In order to achieve the above purpose, the utility model discloses the technical scheme who takes does: a folding knife comprises a knife handle and a blade, wherein the knife handle is provided with a knife slot, the blade is hinged at the end part in the knife slot through a first connecting nail, the blade can rotate relative to the knife slot around the first connecting nail to be opened and folded in the knife slot, the folding knife also comprises a power assisting mechanism which can play a power assisting role in the opening and folding directions of the blade, the power assisting mechanism comprises a first transmission rod, a second transmission rod and a spring arm, the front end of the first transmission rod is hinged with the blade through a second connecting nail, the middle part of the second transmission rod is hinged with the knife handle, one end of the second transmission rod is hinged with the rear end of the first transmission rod through a third connecting nail, the other end of the second transmission rod is connected with the free end of the spring arm, when the blade is operated in the opening direction under a folding state, the central point of the second connecting nail passes through the central connecting line of the first connecting nail and the third connecting nail, the power assisting mechanism blade provides, and after the central point of the second connecting nail passes through the central connecting line of the first connecting nail and the third connecting nail, the boosting mechanism provides boosting action to the blade in the opening direction.

In the above scheme, before the blade is opened, the second transmission rod of the power assisting mechanism can abut against the free end of the elastic arm to enable the elastic arm to maintain elastic deformation, and the elastic arm provides power for the power assisting mechanism to push the blade to be folded or opened. When the blade is in the folding state to the in-process of opening the direction operation, the central point of second connection nail is before the central line through first connection nail and third connection nail, and the elastic arm provides helping hand mechanism to promote blade anticlockwise pivoted power, and the helping hand is rotated to folding direction in the blade promptly, is equivalent to providing a counter force to the blade direction of opening, can avoid the blade to open automatically under folding state like this, and the blade is folded more firmly. In the process, the power provided by the elastic arm is transmitted through the power-assisted mechanism, the component force of the power provided by the elastic arm needs to be overcome when the blade is opened, the force is relatively small, the blade can be smoothly opened without great acting force applied to the opening direction by pinching the blade by fingers, and the blade opening operation is relatively labor-saving; after the central point of the second connecting nail passes through the central connecting line of the first connecting nail and the third connecting nail, the elastic arm provides power for the power-assisted mechanism to push the blade to rotate clockwise, namely, the power is assisted to rotate towards the opening direction, the blade can be automatically opened continuously, the user is not required to continuously apply opening power to the blade, and the blade is opened in a labor-saving and convenient manner.

Furthermore, a guide groove is formed in the side face of the cutter handle, the first transmission rod is located in the guide groove and can rotate relative to the inner side of the guide groove, the guide groove is provided with a starting point and an end point, and when the blade rotates to the folded state, the front end of the first transmission rod rotates to the position of the starting point of the guide groove. Like this, can make things convenient for putting of first transfer line, make full use of handle body space, when the blade rotated to the open mode moreover, the front end of first transfer line rotated the final position to the guide slot, can play the positioning action to the rotation of blade like this, avoided the blade to open and folding direction excessively rotate.

Furthermore, the elastic arm is formed by directly arranging a notch on one side surface of the knife handle corresponding to the position of the guide groove, so that the manufacturing process is simplified, and materials are saved.

Furthermore, the end, corresponding to the elastic arm, of the second transmission rod is connected with the free end of the elastic arm through the convex column in an abutting mode, and the free end of the elastic arm is prevented from limiting the rotation of the second transmission rod.

The utility model has the advantages of, assist drive device can provide the helping hand effect to the blade opening and folding direction, when the blade is opened from fold condition, the blade need overcome the helping hand that assist drive device provided to the blade in folding direction, and the blade will be to opening after the direction rotates to critical angle, the blade continues to rotate and just can open smoothly, the dynamics that needs when opening the blade like this is less than traditional folding sword, the blade needs the angle of rotation bigger, this critical angle can reach 30 ~ 40 degrees, can not appear the blade and just open a small angle from fold condition, if launch the problem of opening about 10 ~ 15 degrees promptly, the security is better; after the blade is opened and surpassed the critical angle, the blade can be opened automatically at the opening helping hand that assist drive mechanism provided, and the blade is opened more conveniently, laborsaving.

Drawings

Fig. 1 is a schematic view showing a folded state of the blade of the folding knife of the present embodiment.

Fig. 2 is a schematic view of a connection line between a center point of the second connecting pin and center points of the first connecting pin and the third connecting pin of the folding knife of this embodiment.

Fig. 3 is a schematic view showing a state in which the blade of the folding knife of the present embodiment is half-opened.

Fig. 4 is a schematic view showing a blade open state of the folding knife of the present embodiment.

Detailed Description

The present invention will be further explained 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.

Examples

As shown in fig. 1-4, the embodiment provides a folding knife, which includes a knife handle 1 and a blade 2, wherein the knife handle 1 includes two stainless steel sheets arranged at an interval, an interval space between the two sheets is a knife slot, the blade 2 is hinged to a front end portion of the knife slot through a first connecting nail 31, the blade 2 can rotate around the first connecting nail 31 relative to the knife slot to open and fold in the knife slot, the folding knife further includes a power assisting mechanism capable of assisting the opening and folding directions of the blade 2, the power assisting mechanism includes a first transmission rod 11, a second transmission rod 12 and a spring arm 13, a front end of the first transmission rod 11 is hinged to a side surface of the blade 2 through a second connecting nail 32, a middle portion of the second transmission rod 12 is hinged to an outer side surface of one of the stainless steel sheets of the knife handle 1 through a fourth connecting nail, and a front end of the second transmission rod 12 is hinged to a rear end of the first transmission rod 11 through a third connecting nail 33, the rear end of the second transmission rod 12 is connected to the free end of the spring arm 13. As shown in fig. 2, when the center point of the second connecting pin 32 is aligned with the center point of the first connecting pin 31 and the center point of the third connecting pin 33, the rear end of the second transmission rod 12 drives the free end of the elastic arm 13 to deform downward to the lowest point. As shown in fig. 1, when the center point of the second connecting pin 32 is located at the upper side direction of the central connecting line of the first connecting pin 31 and the third connecting pin 33, the free end of the elastic arm 13 will automatically return upward to drive the second transmission rod 12 to rotate counterclockwise, and the second transmission rod 12 will drive the front end of the first transmission rod 11 to drive the blade 2 to rotate counterclockwise, so that the front end of the first transmission rod 11 will assist the blade 2 to rotate in the folding direction. As shown in fig. 3 and 4, when the center point of the second connecting pin 32 is located at the lower side of the central connecting line of the first connecting pin 31 and the third connecting pin 33, the free end of the elastic arm 13 will automatically return upward to drive the second transmission rod 12 to rotate counterclockwise, and at this time, the second transmission rod 12 will drive the blade 2 to rotate clockwise at the front end of the first transmission rod 11, so that the blade 2 is assisted by the front end of the first transmission rod 11 to rotate in the opening direction.

The center lines of the first connecting nail 31, the second connecting nail 32, the third connecting nail 33 and the fourth connecting nail are parallel to each other, the elastic arm 13 is formed by directly connecting the handle 1 with the notch 130 formed in the stainless steel plate of the second transmission rod 12, the rear end of the second transmission rod 12 extends to one side of the elastic arm 13 to form a convex column 131, the convex column 131 is located on the upper side of the elastic arm 13, the convex column 131 can abut against the free end of the elastic arm 13, and when the rear end of the second transmission rod 12 rotates downwards, the convex column 131 of the second transmission rod 12 can push the free end of the elastic arm 13 to deform downwards.

The stainless steel plate of the knife handle 1 connected with the second transmission rod 12 is provided with a hollow guide groove 10 on one side corresponding to the position of the elastic arm 13, the first transmission rod 11 is arranged in the guide groove 10 and can rotate relative to the inner side of the guide groove 10, the guide groove 10 is provided with a starting point 101 and a terminal point 102, as shown in fig. 1, when the blade 2 rotates to the folding state, the front end of the first transmission rod 11 rotates to the position of the starting point 101 of the guide groove 10, and the blade 2 is prevented from excessively rotating towards the folding direction. As shown in fig. 4, when the blade 2 is rotated to the open state, the front end of the first transmission lever 11 is rotated to the end point 102 of the guide slot 10, so as to prevent the blade 2 from being excessively rotated in the opening direction. An outer handle for thickening the thickness of the knife handle is further arranged on the outer sides of the two stainless steel plates of the knife handle 1, so that the inner structure of the knife handle is conveniently expressed, and the outer handle is omitted in the attached drawings. The outer handle can be made of plastic, wood or metal materials, and the inner side of the outer handle is provided with an avoiding groove at the position corresponding to the power assisting mechanism.

The utility model discloses a during folding sword used, when needs are opened blade 2, as shown in fig. 1, the accessible finger holds between the fingers 2 backs of blade and rotates blade 2 to opening the direction clockwise, 2 can drive first transfer line 11 rotations when blade 2 pivoted, first transfer line 11 can drive in second transfer line 12 rotation simultaneously, projection 131 of second transfer line 12 promotes downwards that the elastic arm 13 free end takes place to warp, can reverse action when elastic deformation takes place for elastic arm 13 and make it have anticlockwise rotation's trend in second transfer line 12, assist drive device promptly can provide and open opposite direction's power for blade 2, blade 2 is opened the process and is overcome elastic arm 13 and provide and open opposite direction's power, can avoid the blade to open in the accident under the effort condition that the user did not exert, the security is improved. As shown in fig. 2, when the blade 2 rotates to a point where the center point of the second connecting pin 32 and the center point of the first connecting pin 31 and the center point of the third connecting pin 33 are on the same straight line, the free end of the elastic arm 13 is pushed downward by the convex pillar 131 to deform to the lowest point, and at this time, the back of the blade 2 is slightly pulled downward to rotate the blade 2 clockwise in the opening direction, so that the center point of the second connecting pin 32 is located at the lower side of the center connecting line of the first connecting pin 31 and the third connecting pin 33, at this time, the free end of the elastic arm 13 automatically returns upward to react with the force of the second transmission rod 12 and the first transmission rod 11 to change into the driving force for driving the blade 2 to rotate clockwise, so that the front end of the first transmission rod 11 rotates downward to the end point 102 of the guide slot 10, as shown in fig. 4, the blade 2 can be rotated to the open state conveniently and. On the contrary, as shown in fig. 2, when the blade 2 is folded from the open state, the elastic arm 13 provides the blade 2 with the resistance force for blocking the folding of the blade 2 in the clockwise direction through the power assisting mechanism before the blade 2 rotates to the point where the center point of the second connecting pin 32 is aligned with the center point of the first connecting pin 31 and the center point of the third connecting pin 33, and the elastic arm 13 provides the blade 2 with the power assisting force for assisting the folding of the blade 2 in the counterclockwise direction through the power assisting mechanism after the blade 2 rotates to the point where the center point of the second connecting pin 32 is aligned with the center point of the first connecting pin 31 and the center point of the third connecting pin 33. As shown in fig. 1, until the front end of the first transmission rod 11 rotates upwards to the position of the starting point 101 of the guide slot 10, that is, the blade 2 rotates to the folded state, at this time, the free end of the elastic arm 3 will continue to reset upwards and continuously provide an acting force for the blade 2 to rotate anticlockwise, so that the automatic opening phenomenon of the blade 2 in the folded state can be avoided, the folding stability of the blade 2 is improved, and the use is safer.

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto, and the design concept of the present invention is right, the insubstantial modification made by the present invention all falls into the protection scope of the present invention.

Claims

1. The utility model provides a folding knife, includes handle of a knife (1) and blade (2), handle of a knife (1) seted up the sword groove, blade (2) articulate the tip position in the sword groove through first connecting nail (31), blade (2) can rotate to opening and fold in the sword groove around first connecting nail (31) relative sword groove, its characterized in that: still including the helping hand mechanism that can play the helping hand effect to opening and folding direction blade (2), helping hand mechanism includes first transfer line (11), second transfer line (12) and elastic arm (13), the front end of first transfer line (11) connect nail (32) through the second and blade (2) are articulated, the middle part and handle of a knife (1) of second transfer line (12) are articulated, and the one end of second transfer line (12) is connected nail (33) through the third and is articulated with first transfer line (11) rear end, the other end is connected with the free end of elastic arm (13), in-process to opening the direction operation under fold condition blade (2), the central point of nail (32) is being connected through first connection nail (31) and before the central line of third connection nail (33), helping hand mechanism provides the helping hand effect to folding direction blade (2), and the central point of second connection nail (32) is being connected nail (31) and third through first connection nail (33) is being connected the central point and is being connected the central point of nail (33) and is being connected to the second After threading, the booster mechanism provides a booster action to the blade (2) in the opening direction.

2. The folding knife according to claim 1, wherein: the utility model discloses a cutter handle, including handle of a knife (1), handle of a knife (1) side seted up guide slot (10), first transfer line (11) are located guide slot (10) and can rotate to guide slot (10) inboard relatively, guide slot (10) have starting point (101) and terminal point (102), when blade (2) rotated to folded state, the front end of first transfer line (11) rotated to the starting point (101) position of guide slot (10), when blade (2) rotated to open mode, the front end of first transfer line (11) rotated to terminal point (102) position of guide slot (10).

3. The folding knife according to claim 2, wherein: the elastic arm (13) is formed by directly arranging a notch (130) on one side surface of the position of the knife handle (1) corresponding to the guide groove (10).

4. The folding knife according to claim 3, wherein: one end of the second transmission rod (12) corresponding to the elastic arm (13) is connected with the free end of the elastic arm (13) in an abutting mode through the convex column (131).