CN220146001U - Folding knife locking structure - Google Patents

Abstract

The utility model discloses a folding knife locking structure which comprises a lock bridge, a button washer, a screw washer, a button, a main shaft screw, a locking spring and a button spring. The locking bridge provided by the utility model can be automatically inserted into the locking groove or the closing groove arranged on the blade according to the rotation angle of the blade under the pushing of the locking spring, so that the locking effect is automatically achieved, the locking bridge is provided with the locking contact surface, the locking bridge is divided into two sections with different angles, the double effects of wear compensation and locking insurance are realized, the operation of manual safety is not needed, the locking bridge has the advantages of convenience in operation and firmness in locking, the operation gesture does not need to be realized on the folding path of the blade, the locking structure of the locking bridge is fastened by only one spindle screw, no specific structure is exposed in appearance, and the locking bridge has the advantages of simplicity and attractiveness. The utility model has the advantages of small total occupied space, less avoidance interference on the blade, high storage proportion during closing and space saving.

Description

Folding knife locking structure

Technical Field

The utility model relates to the field of folding knives, in particular to a folding knife locking structure.

Background

Folding knives with locking structures are a common tool for production and life, where the blade can be rotated through a range of angles. When the blade is unfolded to the maximum angle, the locking structure can automatically pop out to lock the blade, so that the blade is convenient for a user to use. The unlocking switch is arranged on the locking structure, the unlocking switch can be operated by a finger to unlock, and the blade is rotationally stored in the handle, so that the novel knife handle has the advantages of small storage space and combination of knife handles and knife sheaths. Along with the development of productivity and the improvement of the living standard of people, higher requirements from 'energy use' to 'good use' are also put forward on tools. In the field of folding knives, there are several general user needs.

Control convenience: the device can be operated by a comfortable gesture with one hand, and can control the unfolding, unlocking and closing of the blade. In the process, if the hand feeling is smooth and is not stagnant, the hand feeling is better.

Locking is firm: when the utility model is used under high force, the locking structure is not broken or slipped, and the blade is folded back to hurt hands. Some folding knives can be additionally provided with a second manual safety lock or a bolt outside the automatic locking, so that the firmness can be improved, but the requirement of convenience in operation is overcome.

Anti-misoperation: the hand is not hurt because of the blade turns back because of touching the unlock switch by mistake in normal use, can not hurt the hand because the finger is in the blade turning back route when normally unlocking, can not hurt people or articles because the blade accidentally spreads because of the vibrations of walking or transportation when accomodating.

Succinct pleasing to the eye: each locking structure, and particularly the unlocking switch therein, inevitably has a protrusion or a break, wherein the protrusion is generally an unlocking switch for finger pressing, and the break is in the specific forms of a screw, an opening, a slot, a block joint and the like. Users seeking a compact aesthetic will want these protrusions or breaks to be as small as possible, preferably hidden from view.

Space is saved: the locking structure necessarily occupies a certain space and collides with the blade. The larger the locking structure, the more area can be exposed when the blade is closed, or the blade needs to be gap-avoiding, and the length of the usable cutting edge is lost. The user may want the less space wasted the better.

In the current market, there are many popular locking structures, such as liner locks, backlocks, shaft locks, etc. The lining lock is the most popular locking structure, has the advantages of convenient operation, simplicity, attractive appearance and space saving, but has the disadvantages of firm locking and misoperation prevention. The backlock may be the best in terms of locking securely, but has obvious drawbacks in terms of handling ease, prevention of mishandling, space saving. The shaft lock has good control convenience, firm locking and misoperation prevention, but has the defects of simplicity, attractive appearance and space saving. The above needs are all long, but no locking structure has yet emerged to meet the customer's needs in all aspects.

Therefore, the utility model provides a locking structure which is convenient to operate and control, firm in locking, misoperation-preventing, simple and attractive, and space-saving, and meets the requirements of customers in the current market.

Disclosure of Invention

1. Technical problem to be solved

Aiming at the problems in the prior art, the utility model aims to provide a folding knife locking structure which can solve the problems that the existing locking structure can not simultaneously meet the requirements of users such as convenience in operation, firmness in locking, misoperation prevention, simplicity and attractiveness and space saving.

2. Technical proposal

In order to solve the problems, the utility model adopts the following technical scheme.

The utility model provides a folding knife locking structure, locking structure includes lock bridge, button packing ring, screw packing ring, button, main shaft screw, locking spring and button spring, is the screw thread pore in the middle of the main shaft, and button packing ring threaded connection is in the main shaft upper end, and the screw packing ring passes through main shaft screw setting in the main shaft lower extreme.

One end of the button penetrates through the button washer body and stretches into the threaded hole channel of the main shaft, a button spring is arranged between the button and the main shaft screw in the threaded hole channel, an avoidance hole is formed in the side edge of the button washer, and a locking spring placing hole is formed in the screw washer; the locking spring placing hole is provided with a locking spring, two ends of the locking bridge are respectively provided with a first contact block which is clamped into the button gasket and is contacted with the button through the avoiding hole, the second contact block is clamped at the other end of the locking spring, two sides of the locking bridge are respectively provided with a locking contact surface which is matched with the cutting edge locking groove, and a closing contact surface which is matched with the cutting edge closing groove.

By means of the structure, the button is pressed down relative to the button gasket, so that the lock bridge is driven to move downwards, the position of the lock bridge changes, the locking contact surface of the lock bridge is separated from the blade locking groove, the blade can rotate around the handle, folding or unfolding can be achieved, and the blade is not directly or indirectly pressed by any spring during rotation, so that friction resistance is small, one-hand operation can be achieved, the other hand is not needed to assist in rotating the blade, and the effect of controlling and facilitating is achieved. Meanwhile, as the push button does not need fingers to appear on the folding path of the blade, the hand injury can be prevented, the misoperation prevention effect is realized, in the pressing process, the push button and the lock bridge respectively squeeze the push button spring and the lock spring, but after the external force is released, the push button and the lock bridge return to the original positions under the action of the elastic force, the lock bridge can be locked through the locking contact surface which is matched with the blade locking groove or can provide a certain threshold value of closing resistance through the closing contact surface which is matched with the blade closing groove, so that people or articles can not be injured due to accidental unfolding of the blade caused by walking or vibration of transportation during storage. Preferably, a groove is formed at the extending end of the button, and a clamping rubber ring for fixing the extending end of the button on a threaded hole channel of the main shaft is arranged on the groove; an inner step for clamping the rubber clamping ring is arranged in the middle of the button gasket.

Therefore, the groove is formed in the extending end of the button, the clamping rubber ring is arranged, the inner step is matched, the position of the button is fixed, the use of the button is not affected, the structure is simple, and the manufacturing cost is low.

Preferably, the upper surface of button packing ring has seted up the first recess that matches with the button size, has seted up the button in the first recess and has stretched into the end hole, and the lock bridge that is used for lock bridge and button contact is still seted up to first recess side and is touched the breach.

Therefore, the first groove matched with the size of the button is used for enabling the button to be arranged in the button gasket, the lock bridge is contacted with the break to enable the button to be contacted with the first contact block of the lock bridge, the whole structure is wholly concealed in the handle, the appearance of the whole structure is more attractive, and meanwhile the break is matched with the handle to prevent the button gasket from rotating. The problem that the normal use is affected due to friction between the button gasket and the movement of the lock bridge caused by the rotation of the button gasket is avoided. The button is flush with the button gasket, so that the anti-misoperation function is realized besides attractive appearance, and if no hard circle is arranged around the button for protection, the button is easy to touch by mistake in use, and the blade is unlocked to injure fingers by mistake. After the protective ring is added, the finger tip is needed to extend into the small hole to be pressed to the depth required by unlocking, and other modes can not be used for unlocking, so that the problem of hand injury caused by false touch is solved.

Preferably, the middle of the screw washer is provided with a circular ring in a protruding mode, a main shaft hole for the main shaft to pass through is formed in the middle of the screw washer, and an arc-shaped break used for matching the handle and the locking spring is formed in the side edge of the protruding circular ring.

Therefore, the locking spring and the fixing handle are conveniently fixed through the arc-shaped opening, the whole structure is totally concealed in the upper handle and the lower handle, the whole structure is concise and attractive, and the arc-shaped opening also plays a role in preventing rotation.

Preferably, the outer end of the main shaft is provided with an upper gasket and a lower gasket respectively from top to bottom, a cutting edge setting area is formed between the upper gasket and the lower gasket, an upper handle fixing area is formed between the upper gasket and the button gasket, and a lower handle fixing area is formed between the lower gasket and the screw gasket.

Therefore, the upper gasket and the lower gasket are fixedly arranged to form a blade arrangement area, an upper handle fixing area and a lower handle fixing area, so that the whole structure is totally concealed in the handle, and the appearance of the whole structure is more attractive.

The utility model has the technical advantages that:

the locking structure of the utility model only needs one spindle screw to fasten, has no specific structure exposed in appearance, and has the advantages of conciseness and beautiful appearance.

Compared with the existing locking structure for placing the button at the main shaft in the market, the push button with the structure moves together with the parts playing a role in locking, so that the push button is in a concave position in use, the appearance is not perfect, the push button is always in a perfect flush position, and the appearance is more attractive.

The utility model adopts the mode that the arch lock bridge bypasses the outer ring of the blade, so that the distance between the locking contact surface and the circle center is maximized as much as possible, namely the locking force arm is maximized, the locking stress under the condition of the same external force moment is reduced, and the locking is firmer.

In the utility model, the locking contact surface of the lock bridge is divided into two sections with different angles, one section is flat and the other section is inclined. The inclined section is a compensation inclined surface, is a locking contact surface which is normally used, provides abrasion compensation, ensures that no gap exists between the blade and the lock bridge, and cannot shake. The flat section is a safety plane, and is not contacted with the blade in a normal state, but when the blade is impacted by external force to slide with the inclined plane, for example, the blade is clamped when a firewood is split in the field, the firewood is pulled outwards by force, and the like, the plane appears when the firewood slides to the extreme end of the inclined plane, and the folding path of the blade is blocked. Because of plane contact, the component force of the pressure of the blade to the lock bridge in the translational direction of the lock bridge is suddenly changed to 0 (component force on the inclined plane), so that the lock bridge loses translational power and only remains friction force, and can not continue to move, and the blade is locked and can not hurt hands, and the effect of the two sections of locking surfaces is equivalent to the manual safety of the addition of some folding knives in the market, but the scheme is fully automatic. Simultaneously, the requirements of convenient operation and firm locking are met.

The utility model can be operated by comfortable gestures with one hand to control the unfolding, unlocking and closing of the blade. The friction force is small in the process, the operation hand feeling is smooth, and the operation is convenient.

The utility model has the advantages that when the device is closed, the device has closing resistance, vibration and false opening are prevented, when the device is unfolded, the protection ring surrounds the button to prevent false touch, when the device is unlocked, fingers do not need to appear on a cutting edge retracing path to prevent hand injury, and the device has multiple aspects of false operation prevention.

The appearance of the assembled parts of the button, the button gasket, the spindle screw and the screw gasket is not different from that of the common folding knife spindle structure, and the additional occupied space is avoided. The rubber ring, the button spring and the locking spring are completely hidden inside and cannot be seen, and no extra space is occupied. The lock bridge is in a semi-hidden state and can be seen only from a specific angle, and the use part of the blade exposed out of the handle is not interfered, so that all the influence is hidden in a small range in the handle, and the space saving effect is achieved.

Drawings

Fig. 1 is a schematic diagram of the whole structure of the locking structure of the present embodiment.

Fig. 2 is a front view of the whole structure of the locking structure of the present embodiment.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a schematic view of the folding knife according to the present embodiment.

Fig. 5 is an exploded view of the folding knife of the present embodiment.

Fig. 6 is a schematic diagram of the button structure of the present embodiment.

Fig. 7 is a top view of the button washer of the present embodiment.

Fig. 8 is a schematic view of the structure of the button washer of the present embodiment.

Fig. 9 is a schematic front and back view of the lower handle of the present embodiment.

Fig. 10 is a schematic view of a screw washer according to the present embodiment.

Fig. 11 is a top view of the screw washer of the present embodiment.

Fig. 12 is a schematic view of the structure of the blade of this embodiment.

Fig. 13 is a schematic structural view of a lock bridge according to the present embodiment.

Fig. 14 is a top view of the lock bridge of the present embodiment.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Examples:

referring to fig. 1-14, a folding knife locking structure 100, the locking structure 100 includes a lock bridge 1, a button washer 2, a screw washer 3, a button 4, a spindle 5, a spindle screw 6, a locking spring 7 and a button spring 8, wherein a threaded hole is formed in the middle of the spindle 5, the button washer 2 is in threaded connection with the upper end of the spindle 5, and the screw washer 3 is disposed at the lower end of the spindle 5 through the spindle screw 6.

One end of the button 4 penetrates through the button washer 2 and stretches into a threaded hole channel of the spindle 5, a button spring 8 is arranged between the button 4 and the spindle screw 6 in the threaded hole channel, an avoidance hole is formed in the side edge of the button washer 2, and a locking spring 7 placement hole is formed in the screw washer 3; the locking spring 7 is arranged on the placing hole of the locking spring 7, the two ends of the locking bridge 1 are respectively provided with a first contact block 101 which is clamped into the button washer 2 and is contacted with the button 4 through the avoiding hole, a second contact block 102 which is clamped at the other end of the locking spring 7, and two sides of the locking bridge 1 are respectively provided with a locking contact surface 104 which is clamped with a locking groove 200a of the cutting edge 200 and a closing contact surface 103 which is clamped with a closing groove 200b of the cutting edge 200.

Preferably, a groove is formed at the extending end of the button 4, and a clamping rubber ring 401 for fixing the extending end of the button 4 in a threaded hole channel of the spindle 5 is arranged on the groove; the button washer 2 is provided with an inner step 201 in the middle for clamping the click ring 401.

Preferably, the upper surface of the button washer 2 is provided with a first groove 202 which is matched with the button 4 in size, a button extending end hole 203 is formed in the first groove 202, and a lock bridge contact break 204 for contacting the lock bridge 1 with the button 4 is formed on the side edge of the first groove 202.

Preferably, the middle of the screw washer 3 is provided with a circular ring in a protruding mode, a main shaft 5 hole for the main shaft 5 to pass through is formed, and the side edge of the protruding circular ring is provided with an arc-shaped break 301 for matching the handle and the locking spring 7.

Preferably, an upper gasket 9 and a lower gasket 10 are respectively arranged at the upper and lower parts of the outer end of the main shaft 5, a cutting edge setting area A is formed between the upper gasket 9 and the lower gasket 10, an upper handle fixing area B is formed between the upper gasket 9 and the button washer 2, and a lower handle fixing area C is formed between the lower gasket 10 and the screw washer 3.

In this embodiment, the lock bridge is constrained to slide only in one direction within a pair of rectangular holes 401 symmetrically disposed inside the shank.

In this embodiment, the locking contact surface 104 of the lock bridge 1 is divided into two sections with different angles, one section being flat and the other section being inclined. The bevel section is a compensation bevel 104a, is a normal locking contact surface 104, and provides wear compensation, ensuring that there is no gap between the blade 200 and the lock bridge 1, and no wobble. The flat section is a safety plane 104b, and is not contacted with the blade 200 in a normal state, but when the blade 200 is impacted by external force to slide with the inclined plane, for example, the blade is clamped when a firewood is split and cut in the field, the blade is pulled outwards by force, and the like, the blade slides to the tail end of the inclined plane to form a plane, so that the folding path of the blade 200 is blocked. Because of the plane contact, the component force of the pressure of the blade 200 to the lock bridge 1 in the translational direction of the lock bridge is suddenly changed to 0 (component force on an inclined plane), so that the lock bridge 1 loses the translational power and only remains friction force, and the lock bridge cannot continue to move, thereby ensuring that the blade 200 is locked and cannot hurt hands, and avoiding the problem that the blade 200 is folded back and hurt hands under the same condition compared with a common folding knife.

The specific embodiment is as follows: in this embodiment, the blade 200 is disposed on the spindle 5 between the upper pad 9 and the lower pad 10 through the blade disposition area a, the upper handle fixing area B and the lower handle fixing area C are respectively fixed with the upper handle 300 and the lower handle 400, the blade 200 is provided with an exposed portion for finger operation to push the blade 200 to rotate around the spindle 5, and it is noted that the exposed portion of the blade includes various manners including a projection, a nail slot, an opening, a push button, a push plate, and the like.

A knife stopping column for stopping the counterclockwise rotation of the knife 200 is further arranged between the upper handle 300 and the lower handle 400 and the knife 200, the knife stopping column belongs to the prior art, the specific structure and the working principle are not repeated in the utility model, and in the embodiment, the upper handle 300 and the lower handle 400 are mirror image structures.

In this embodiment, the folding knife is initially in a closed state, in which on the one hand the counter-clockwise rotation of the blade 200 is blocked by the knife post; on the other hand, the lock bridge 1 is urged by the lock spring 7 to enter the closed groove of the blade 200, preventing the clockwise rotation of the blade 200. The resistance in both directions causes the blade 200 to be restrained in a fixed position, but wherein the resistance of the bridge 1 provides for closing the contact surface 103, which can be pushed open only by the finger providing a force exceeding a certain threshold.

At this time, the lock bridge 1 is not in contact with the button 4, the button 4 is pushed by the button spring 8 to be flush with the surface of the button washer 2, at this time, the continued movement of the button 4 is limited by the click ring 401 and is not ejected from the button washer 2, which is the normal state of the button 4, and when no finger is pressed, the button 4 is always limited by the button spring 8 and the click ring, and stops at the position flush with the button washer 2.

By pressing the button 4, the lock bridge 1 is unlocked to restrict the blade 200, or the finger provides a force exceeding a certain threshold value, driving the blade 200 to rotate around the spindle 5, in which intermediate state the lock bridge 1 is not fixed in the blade 200 closing groove 200b or the blade 200 locking groove 200a, whereby the blade 200 can freely rotate clockwise or counterclockwise.

When the blade 200 is rotated and unfolded, an unfolded locking state is formed, in which, on the one hand, the clockwise rotation of the blade 200 is blocked by the stopping post; on the other hand, the lock bridge 1 is urged by the lock spring 7 to enter the blade 200 lock groove 200a of the blade 200, preventing counterclockwise rotation of the blade 200. The resistance in both directions causes the blade to be restrained in a fixed deployed position. Unlike the closed state, the slope of the locking interface 104 is very small, which creates a friction angle self-locking condition that results in a very secure lock.

When the storage is required to be closed, the button 4 is required to be pressed, the limitation of the lock bridge 1 is removed, and the unfolding and unlocking state is formed, so that the blade 200 can freely rotate to enter the intermediate state and return to the closed state to finish the storage.

The difference between the deployment unlocked state and the deployment locked state depends entirely on whether the button 4 is pressed. When the button 4 is not pressed, the blade is in a locked state and cannot rotate; when the button 4 is pressed, the blade is free to rotate so as to enter an intermediate state back to the closed state to complete the storage.

The present utility model is perfectly integrated into the spindle screw 6 by the folding knife locking structure 100 without adding any appearance-specific locking structure 100. There is more simplicity and aesthetics than other locking arrangements 100, either with additional buttons 4, or with additional slots, or with additional screws.

It is noted that the upper pad and the lower pad may be replaced by structures such as thrust ball bearings, etc. capable of forming a blade setting area, etc., which belongs to the prior art for those skilled in the art, and the equivalent replacement of the structure can be realized by simple replacement. The above description is only of the preferred embodiments of the present utility model; the scope of the utility model is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present utility model, and the technical solution and the improvement thereof are all covered by the protection scope of the present utility model.

Claims (5)

1. A folding knife locking structure, characterized in that: the locking structure comprises a lock bridge, a button washer, a screw washer, a button, a main shaft screw, a locking spring and a button spring;

the middle of the main shaft is provided with a threaded hole, the button washer is in threaded connection with the upper end of the main shaft, and the screw washer is arranged at the lower end of the main shaft through a main shaft screw;

one end of the button penetrates through the button washer and stretches into a threaded hole channel of the main shaft, and a button spring is arranged between the button and the main shaft screw in the threaded hole channel;

the side edge of the button washer is provided with an avoidance hole, and the screw washer is provided with a locking spring placing hole; the locking spring placing hole is provided with a locking spring;

the two ends of the lock bridge are respectively provided with a first contact block which is clamped into the button gasket and is contacted with the button through the avoidance hole, and a second contact block which is clamped at the other end of the locking spring;

the two sides of the lock bridge are respectively provided with a locking contact surface for clamping the blade locking groove, and a closing contact surface for clamping the blade closing groove;

the locking contact surface is divided into two sections which are flat and inclined.

2. The folding knife locking structure according to claim 1, wherein: a groove is formed at the extending end of the button, and a clamping rubber ring for fixing the extending end of the button on a threaded hole channel of the main shaft is arranged on the groove; an inner step for clamping the rubber clamping ring is arranged in the middle of the button gasket.

3. The folding knife locking structure according to claim 1, wherein: the upper surface of button packing ring is offered and is agreed with the first recess of button size, offer the button in the first recess and stretch into the end hole, the lock bridge that is used for lock bridge and button contact is still offered to first recess side and is touched the breach.

4. The folding knife locking structure according to claim 1, wherein: the middle of the screw washer is provided with a circular ring in a protruding mode, a main shaft hole for a main shaft to pass through is formed in the middle of the screw washer, and an arc-shaped break used for matching the handle and the locking spring is formed in the side edge of the protruding circular ring.

5. The folding knife locking structure according to claim 1, wherein: the upper and lower gaskets are arranged at the outer end of the main shaft respectively, a blade setting area is formed between the upper gasket and the lower gasket, an upper handle fixing area is formed between the upper gasket and the button gasket, and a lower handle fixing area is formed between the lower gasket and the screw gasket.