Folding knife

Abstract

The utility model provides a folding knife, which comprises a knife body and a handle body, the rear end of the knife body is pivoted with the front end of the handle body, the handle body is provided with a containing groove for containing the knife body, the handle body comprises a first handle body and a second handle body, the front end of the first handle body is pivoted with the central position of the rear end of the knife body through a first connecting nail, and the rear end of the second handle body is pivoted with the central position of the rear end of the knife body through a second connecting nail. The front end of the second handle body is pivoted to the position, close to the rear edge, of the rear end of the cutter body through a second connecting nail, the rear end of the first handle body is connected with the rear end of the second handle body through a connecting rod, one end of the connecting rod is pivoted to the rear end of the first handle body through a third connecting nail, and the other end of the connecting rod is pivoted to the rear end of the second handle body through a fourth connecting nail. When the first handle body translates relative to the second handle body, the cutter body can rotate between a first position where the cutter body is folded in the storage groove and a second position where the cutter body is completely unfolded relative to the handle body. The utility model has the advantages that when the handle body is grabbed, the knife body cannot be unfolded and folded relative to the handle body, a locking mechanism does not need to be additionally arranged, the unfolding and folding speed of the knife body is gentle, and the safety is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting tools, and more specifically, particularly relates to a folding knife. Background Art

[0002] A folding knife is a manual cutting tool used for cutting objects. The blade of the folding knife can be rotated to open and folded. When it is necessary to cut objects, the blade can be rotated to open, so that the blade can be used to cut objects. When it is not necessary to cut objects, the blade can be rotated to fold, and the blade is stored in the handle, which can protect the blade and prevent it from being cut by the blade, making it more convenient to carry and store.

[0003] For example, the Chinese utility model patent with patent number 202320114576.5 and invention name as piston shaft lock folding knife comprises: a blade body, provided with a blade portion, one end of the blade body is provided with a pivot hole, the blade body is provided with a first stop portion and a second stop portion at the outer edge of the pivot hole; a rotating shaft is provided in the pivot hole of the blade body; two side plates, one end of each side plate is provided with a pivot portion, each side plate is provided with the pivot portion at one end of the rotating shaft so that the blade body can be relative to the two side plates The plate rotates, and a long groove and a pivot hole are provided on the relative inner sides of the two side plates; a telescopic rod group has a fixed rod and a telescopic rod that can be telescopically moved, and the telescopic rod is sleeved on the fixed rod and can be telescopically moved relative to the fixed rod. The fixed rod is pivoted between the two pivot holes of the two side plates with one end thereof, and a bolt is provided at one end of the telescopic rod, and the bolt is arranged between the two long grooves of the two side plates, and a stopper is provided on the telescopic rod; a control member is arranged on the telescopic rod and exposed to the two side plates.

[0004] The piston shaft lock folding knife can simplify the originally complex and difficult to assemble spring and control structure into a module, so as to simplify the manufacturing and assembly process, shorten the manufacturing time and improve the manufacturing efficiency. However, there are also shortcomings. The structure of the telescopic rod group is still too complicated, and when the telescopic rod group is in the unlocked state, the blade will be expanded or retracted by gravity, which poses certain safety hazards. Summary of the invention

[0005] The invention of the utility model aims to overcome the above-mentioned technical problems and only provides a folding knife with simple structure and good safety.

[0006] The utility model is realized through the following technical solution.

[0007] The utility model provides a folding knife, comprising a knife body and a handle body, wherein the rear end of the knife body is pivotally connected to the front end of the handle body, and the handle body is provided with a storage groove for storing the knife body, wherein the handle body comprises a first handle body and a second handle body, wherein the front end of the first handle body is pivotally connected to the center position of the rear end of the knife body through a first connecting nail, and the front end of the second handle body is pivotally connected to the position of the rear end of the knife body close to the rear edge through a second connecting nail, and the rear end of the first handle body is connected to the rear end of the second handle body through a connecting rod, one end of the connecting rod is pivotally connected to the rear end of the first handle body through a third connecting nail, and the other end of the connecting rod is pivotally connected to the rear end of the second handle body through a fourth connecting nail, and when the first handle body is translated relative to the second handle body, the knife body can rotate relative to the handle body between a first position folded in the storage groove and a second position fully extended.

[0008] In the above technical solution, the deployment and folding of the blade body is achieved by operating the first handle body to move forward and backward relative to the second handle body. The deployment and folding of the blade body will not be affected by gravity and has high safety. When the blade body is located at the first position and the second position and the user's hand grasps the handle body, the first handle body and the second handle body cannot move relative to each other. At this time, the blade body cannot be folded or deployed, and the setting of the locking mechanism can be omitted, and the structure is simpler.

[0009] Preferably, the first handle body includes a first handle piece, the front end and the rear end of the first handle piece are each provided with an assembly hole, the number of the first handle pieces is two, the two first handle pieces are symmetrically arranged on both sides of the blade body and the connecting rod, and the first handle piece is respectively connected to the first connecting nail and the third connecting nail through the two assembly holes. In this technical solution, by symmetrically arranging two identical first handle pieces on both sides of the blade body and the connecting rod, and then connecting and fixing them through the first connecting nail and the third connecting nail, the overall structure of the first handle body is simple, the manufacturing cost is low, and the assembly is also very convenient.

[0010] Preferably, the second handle body includes a second handle piece, the number of the second handle pieces is two, the two second handle pieces are symmetrically arranged on both sides of the blade body and the connecting rod, and the second handle piece is respectively connected to the second connecting nail and the fourth connecting nail through two assembly holes. In this technical solution, by symmetrically arranging two identical second handle pieces on both sides of the blade body and the connecting rod, and then connecting and fixing them through the second connecting nail and the fourth connecting nail, the overall structure of the second handle body is simple, the manufacturing cost is low, and the assembly is also very convenient.

[0011] Preferably, the inner sides of the first handle piece and the second handle piece are both configured to be a wave structure, the wave structure includes a crest and a trough, the shape of the crest matches the shape of the trough, and the height of the crest is the same as the depth of the trough, and the crest and trough of the first handle piece are configured to respectively match the trough and crest of the second handle piece when the knife body is in the first position and the second position. In the technical solution, by matching the crest of the first handle piece with the trough of the second handle piece, and the trough of the first handle piece with the crest of the second handle piece, when the knife body is in the first position and the second position, the area of ​​the first handle body and the second handle body fitting is larger, the fitting surface of the first handle body and the fitting surface of the second handle body cooperate with each other to better limit the mutual displacement of the first handle body and the second handle body, and the user will not feel that the handle body is loose and shaking when grasping the handle body, and at the same time, when the knife body is operated for cutting, when the reaction force on the knife body acts on the handle body, it will not push the first handle body and the second handle body to move, thereby improving safety.

[0012] Preferably, the shape and size of the second handle piece are the same as those of the first handle piece. In this technical solution, the second handle body piece adopts the same structure as the first handle piece, which can further simplify the production process. The first handle body and the second handle body can be assembled with a handle piece of one specification, which reduces the manufacturing cost.

[0013] Preferably, a first pivot hole is provided at the center position of the rear end of the knife body and at the position of the rear end near the rear edge. The knife body is pivoted to the first connecting nail and the second connecting nail respectively through the two first pivot holes. The side surface of the knife body is provided with a sink groove which is concentric with and connected to the first pivot hole at the periphery of the first pivot hole, and a ball turntable is provided in the sink groove. In this technical solution, by providing the ball turntable, the surface of the knife body does not directly contact the inner side surface of the handle sheet, but contacts through the ball, which can reduce friction, make the knife body rotate more smoothly, and the inner side surface of the handle sheet will not scratch the surface of the knife body.

[0014] Preferably, a second pivot hole is provided at each end of the connecting rod, and the connecting rod is pivotally connected to the third connecting nail and the fourth connecting nail through the two second pivot holes, respectively. A side surface of the connecting rod is provided with a sink groove which is concentric with and connected to the second pivot hole at the periphery of the second pivot hole, and a ball rotating disk is provided in the sink groove. In this technical solution, by providing the ball rotating disk, the surface of the connecting rod does not directly contact the inner side surface of the handle piece, and the friction force can be reduced by the contact of the ball, so that the first handle body and the second handle body can rotate more smoothly relative to the connecting rod.

[0015] Preferably, the axial core distance between the first connecting pin and the second connecting pin is set to be the same as the axial core distance between the third connecting pin and the fourth connecting pin. In this technical solution, through the above setting, the first handle body can always maintain a relatively parallel state when it translates relative to the second handle body, which is conducive to the expansion and folding of the blade body.

[0016] Preferably, the height of the crest and the depth of the trough are set to be equal to or less than half of the distance between the axial cores of the first connecting pin and the second connecting pin. In the present technical solution, through the above settings, not only can the crest of the first handle piece and the trough of the second handle piece, as well as the trough of the first handle piece and the crest of the second handle piece be closely matched, but also the first handle body can be smoothly translated relative to the second handle body, avoiding being blocked by the crest of the first handle piece and the crest of the second handle piece during translation and being unable to translate smoothly.

[0017] Preferably, the rear end of the knife body is provided with a toggle portion at the same side as the knife body cutting edge, and the toggle portion is arranged to be exposed outside the storage slot when the knife body is in the first position and the second position. In the technical scheme, by providing the toggle portion, when the knife body is in the first position, the toggle portion can be pushed by a finger to rotate the knife body to a certain angle, and then the first handle body and the second handle body can be grasped by fingers to continue to drive the first handle body and the second handle body to translate relative to each other, so that the knife body can be fully unfolded. In this way, when the first handle body and the second handle body are directly grasped and translated at the beginning, the fingers will block the unfolding of the knife body, and the trouble of releasing the fingers grasping the first handle body to avoid the knife body and then grasping the first handle body again to drive the translation can be avoided. At the same time, after the knife body is rotated and opened to a certain angle by pushing the toggle portion, the first handle and the second handle can be grasped by fingers to operate the translation, so that the fingers can be prevented from touching the cutting edge of the knife body, and the safety is also higher.

[0018] The advantage of the utility model is that when the user grasps the handle body, the blade body cannot be expanded or retracted relative to the handle body, and there is no need to set up a locking mechanism separately, so the structure is simpler and more practical; the expansion and retraction of the blade body is restricted by the relative translation of the first handle body and the second handle body, and the speed of expansion and retraction of the blade body is relatively slow, and there will be no sudden and rapid opening, so the safety is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model when the knife body is fully unfolded and in the second position;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model when the knife body is fully unfolded and in the second position with one handle piece omitted;

[0021] Figure 3 It is a structural schematic diagram of the utility model when the knife body is retracted into the storage groove and is in the first position;

[0022] Figure 4 It is a schematic diagram of the structure of the utility model when the knife body is retracted in the storage groove and is in the first position and a handle piece is omitted;

[0023] Figure 5It is a schematic diagram of the structure of the utility model when the knife body is folded in the storage groove and is in the first position, and the two upper handle pieces are omitted;

[0024] Figure 6 This is a schematic diagram of the structure of the utility model in which the knife body and the two handle pieces above are omitted;

[0025] Figure 7 It is a structural schematic diagram of the knife body of the utility model;

[0026] Figure 8 It is a structural schematic diagram of the connecting rod of the utility model;

[0027] Fig. 9 It is a structural schematic diagram of the first handle piece of the utility model. DETAILED DESCRIPTION

[0028] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0029] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0030] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0031] Example 1

[0032] The utility model provides a folding knife, such as Figures 1 to 5 ,as well as Figure 7 and Figure 8As shown, it comprises a blade body 1 and a handle body 2, the rear end of the blade body 1 is pivotally connected to the front end of the handle body 2, the handle body 2 is provided with a receiving groove 23 for storing the blade body, the handle body 2 comprises a first handle body 21 and a second handle body 22, the first handle body 21 and the second handle body 22 are both provided with a receiving groove 3, the front end of the first handle 21 is pivotally connected to the center position of the rear end of the blade body 1 through a first connecting nail 3, the front end of the second handle body 22 is pivotally connected to the position of the rear end of the blade body 1 near the rear edge through a second connecting nail 4, specifically, a first pivot hole 12 is respectively provided at the center position of the rear end of the blade body 1 and the position of the rear end near the rear edge, the blade body 1 is pivotally connected to the first connecting nail 3 and the second connecting nail 4 through the two first pivot holes 12. In this way, the axis connecting line of the first connecting nail 3 and the second connecting nail 4 is in the length direction of the blade body 1, and the second connecting nail 4 can rotate 180 degrees around the first connecting nail 3 with the first connecting nail 3 as the center of the circle, which just corresponds to the blade body 1 rotating 180 degrees with the first connecting nail 3 as the rotation axis. The rear end of the first handle body 21 is connected to the rear end of the second handle body 22 through a connecting rod 7, one end of the connecting rod 7 is pivotally connected to the rear end of the first handle body 21 through a third connecting pin 5, and the other end of the connecting rod 7 is pivotally connected to the rear end of the second handle body 22 through a fourth connecting pin 6. Specifically, each end of the connecting rod 7 is provided with a second pivot hole 71, and the connecting rod 7 is pivotally connected to the third connecting pin 5 and the fourth connecting pin 6 through two second pivot holes 71. When the first handle body 21 translates relative to the second handle body 22, the second connecting pin 4 at the front end of the second handle body 22 will rotate around the first connecting pin 3, thereby driving the blade body 1 to rotate, and the blade body 1 can rotate relative to the handle body 2 between a first position retracted in the receiving groove 23 and a second position fully extended. Among them, the axial core distance between the first connecting pin 3 and the second connecting pin 4 is set to be the same as the axial core distance between the third connecting pin 5 and the fourth connecting pin 6, so that when the first handle body 21 translates relative to the second handle body 22, it can always maintain a relatively parallel state, which is conducive to the extension and retraction of the blade body 1.

[0033] like Figure 1 , Figure 3 and Fig. 9As shown, in this embodiment, the first handle body 21 includes a first handle piece 20, and the front end and the rear end of the first handle piece 20 are each provided with an assembly hole 201. The number of the first handle pieces 20 is two, and the two first handle pieces 20 are symmetrically arranged on both sides of the blade body 1 and the connecting rod 7. The first handle piece 20 is respectively connected to the first connecting nail 3 and the third connecting nail 5 through the two assembly holes 201. The second handle body 22 includes a second handle piece, and the number of the second handle pieces is two. In this embodiment, the shape and size of the second handle piece are the same as those of the first handle piece 20. The second handle body piece adopts the same structure as the first handle piece 20, which can further simplify the production process. The first handle body 21 and the second handle body 22 can be assembled by a handle piece of one specification, and the manufacturing cost is lower. The two second handle pieces are symmetrically arranged on both sides of the blade body 1 and the connecting rod 7, and the second handle piece is respectively connected to the second connecting nail 4 and the fourth connecting nail 6 through the two assembly holes 201.

[0034] like Figure 2 and Figure 5 As shown, as a further improvement, a toggle portion 11 is provided at the rear end of the blade body 1 at the same side as the cutting edge of the blade body 1, and the toggle portion 11 is arranged to be exposed outside the storage groove 23 when the blade body 1 is located in the first position and the second position. When the blade body 1 is in the first position, the toggle portion 11 can be pushed by a finger to rotate the blade body 1 to a certain angle, and then the first handle body 21 and the second handle body 22 can be grasped by the fingers respectively to continue to drive the first handle body 21 and the second handle body 22 to translate relative to each other so that the blade body 1 can be fully unfolded.

[0035] Example 2

[0036] The structure of this embodiment is similar to that of embodiment 1, except that: Figure 6 and Fig. 9 As shown, the inner sides of the first handle piece 20 and the second handle piece are both configured to be a wave structure, the wave structure includes a crest 203 and a trough 202, the shape of the crest 203 matches the shape of the trough 202, and the height of the crest 203 is the same as the depth of the trough 202, and the crest 203 and the trough 202 of the first handle piece 20 are configured to match the trough 202 and the crest 203 of the second handle piece when the blade body 1 is located at the first position and the second position, respectively. The height of the crest 203 and the depth of the trough 202 are configured to be equal to or less than half of the distance between the axial cores of the first connecting pin 3 and the second connecting pin 4, so as to prevent the first handle body 21 from being blocked by the crest 203 of the first handle piece 20 and the crest 203 of the second handle piece when the first handle body 21 is translated relative to the second handle body 22 and cannot be translated smoothly.

[0037] Example 3

[0038] The structure of this embodiment is similar to that of embodiment 2, except that Figures 5 to 8 As shown, the side of the knife body 1 is provided with a sink groove 9 on the periphery of the first pivot hole 12, which is concentric with and connected to the first pivot hole 12, and a ball turntable 8 is provided in the sink groove 9. The side of the connecting rod 7 is provided with a sink groove 9 on the periphery of the second pivot hole 71, which is concentric with and connected to the second pivot hole 71, and a ball turntable 8 is provided in the sink groove 9. In this embodiment, the surfaces of the knife body 1 and the connecting rod 7 do not directly contact the inner side surface of the handle piece, and the contact of the balls of the ball turntable 8 can reduce friction and make the rotation smoother.

[0039] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A folding knife, comprising a knife body (1) and a handle body (2), wherein the rear end of the knife body (1) and the front end of the handle body (2) are pivotally connected together, and the handle body (2) is provided with a receiving groove (23) for receiving the knife body (1), characterized in that: The handle body (2) comprises a first handle body (21) and a second handle body (22); the front end of the first handle body (21) is pivotally connected to the center position of the rear end of the blade body (1) through a first connecting pin (3); the front end of the second handle body (22) is pivotally connected to the rear end of the blade body (1) near the rear edge through a second connecting pin (4); the rear end of the first handle body (21) is connected to the rear end of the second handle body (22) through a connecting rod (7); one end of the connecting rod (7) is pivotally connected to the rear end of the first handle body (21) through a third connecting pin (5); the other end of the connecting rod (7) is pivotally connected to the rear end of the second handle body (22) through a fourth connecting pin (6); when the first handle body (21) translates relative to the second handle body (22), the blade body (1) can rotate relative to the handle body (2) between a first position retracted in a receiving groove (23) and a second position fully extended.

2. The folding knife according to claim 1, characterized in that: The first handle body (21) comprises a first handle piece (20), the front end and the rear end of the first handle piece (20) are each provided with an assembly hole (201), there are two first handle pieces (20), the two first handle pieces (20) are symmetrically arranged on both sides of the blade body (1) and the connecting rod (7), and the first handle piece (20) is respectively connected to the first connecting pin (3) and the third connecting pin (5) via the two assembly holes (201).

3. The folding knife according to claim 2, characterized in that: The second handle body (22) comprises a second handle piece, the front end and the rear end of the second handle piece are each provided with an assembly hole (201), there are two second handle pieces, the two second handle pieces are symmetrically arranged on both sides of the blade body (1) and the connecting rod (7), and the second handle piece is respectively connected to the second connecting pin (4) and the fourth connecting pin (6) via the two assembly holes (201).

4. The folding knife according to claim 3, characterized in that: The inner sides of the first handle piece (20) and the second handle piece are both arranged to form a wave structure, the wave structure comprising a wave crest portion (203) and a wave trough portion (202), the shape of the wave crest portion (203) matches the shape of the wave trough portion (202), and the height of the wave crest portion (203) is the same as the depth of the wave trough portion (202), and the wave crest portion (203) and the wave trough portion (202) of the first handle piece (20) are arranged to respectively match the wave trough portion (202) and the wave crest portion (203) of the second handle piece when the knife body (1) is located at the first position and the second position.

5. The folding knife according to claim 4, characterized in that: The shape and size of the second handle piece are the same as those of the first handle piece (20).

6. The folding knife according to any one of claims 1 to 5, characterized in that: A first pivot hole (12) is respectively provided at the center position of the rear end of the knife body (1) and at a position near the rear edge of the rear end. The knife body (1) is pivotally connected to a first connecting nail (3) and a second connecting nail (4) via the two first pivot holes (12). A side surface of the knife body (1) is provided with a sink groove (9) which is concentric with and communicates with the first pivot hole (12) at the periphery of the first pivot hole (12). A ball rotating disk (8) is provided in the sink groove (9).

7. The folding knife according to claim 6, characterized in that: A second pivot hole (71) is respectively provided at both ends of the connecting rod (7), and the connecting rod (7) is pivotally connected to the third connecting nail (5) and the fourth connecting nail (6) through the two second pivot holes (71). A side surface of the connecting rod (7) is provided with a sink groove (9) which is concentric with and connected to the second pivot hole (71) at the periphery of the second pivot hole (71), and a ball rotating disk (8) is provided in the sink groove (9).

8. The folding knife according to claim 7, characterized in that: The axial core distance between the first connecting pin (3) and the second connecting pin (4) is set to be the same as the axial core distance between the third connecting pin (5) and the fourth connecting pin (6).

9. The folding knife according to claim 4, characterized in that: The height of the wave crest portion (203) and the depth of the wave trough portion (202) are set to be equal to or less than half of the distance between the axial cores of the first connecting nail (3) and the second connecting nail (4).

10. The folding knife according to claim 6, characterized in that: The rear end of the blade body (1) is provided with a toggle portion (11) at a position on the same side as the cutting edge of the blade body (1), and the toggle portion (11) is arranged to be exposed outside the storage groove (23) when the blade body (1) is located at the first position and the second position.

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