CN110405694B - Multifunctional line pressing nail gun - Google Patents

Abstract

The invention discloses a multifunctional line pressing nail gun which comprises a frame body, a handle rotationally connected to the frame body, an impact element arranged at the front part of the frame body and a first elastic element connected with the impact element, wherein the handle is related to the impact element through a labor-saving mechanism, the handle is provided with a release position corresponding to the maximum displacement value of the impact element, the frame body is provided with a switching mechanism which is related to the first elastic element and is provided with a first position and a second position, and when the switching mechanism is switched from the first position to the second position, the maximum deformation of the first elastic element corresponding to the release position of the handle is reduced. The invention is suitable for different material objects and different types of gate nails, is convenient to operate and use, and can ensure the quality and efficiency of nailing.

Description

Multifunctional line pressing nail gun

Technical Field

The invention relates to the technical field of hardware tool manufacturing, in particular to a multifunctional line pressing nail gun.

Background

The line ball nail rifle is a kind of manual hardware tool commonly used in occasions such as fitment, and it includes a support body by plastic moulding, is equipped with impact mechanism in the support body. The lower part of the frame body is provided with a nail storage cavity, the nail storage cavity is internally provided with a left guide rail and a right guide rail, so that a strip-shaped nail outlet channel is formed, door-shaped nails which are bonded with each other and are similar to staples are placed in the nail outlet channel, the front end of the nail storage cavity is provided with a nail outlet, the rear part of the nail storage cavity is provided with a pushing mechanism for elastically pushing the door-shaped nails, so that the forefront end of the nails is always clung to the front side of the nail storage cavity, and at the moment, the forefront door-shaped nail in the door-shaped nails is just positioned in the nail outlet. The impact mechanism comprises a rotatable handle and a nailing sheet capable of moving up and down, the nailing sheet is connected with an elastic element, and the handle is connected with the nailing sheet through a labor-saving mechanism. When a user grips the handle, the nailing sheet can be moved upwards through the labor-saving mechanism, and accordingly, the elastic element connected with the nailing sheet is deformed to accumulate elastic force; when the handle is gripped to a certain extent, the nailing piece moves to the highest position, so that the maximum displacement is formed, the labor-saving mechanism is separated from the nailing piece, the elastic force of the elastic element is released, the nailing piece at the front end of the frame body is driven to rapidly move downwards, and then the gate-shaped nails positioned in the nail outlet are punched downwards.

Due to the different materials of the work object of the gate chain riveting, that is to say, the hardness of the work object varies. The prior line ball nail gun has the following defects: when the handle is held, the disengaging position of the labor-saving mechanism and the nailing piece is fixed, so that the maximum displacement value of the nailing piece is fixed, and correspondingly, the deformation generated by the elastic element is the same. That is, the elastic force accumulated by the elastic member is fixed. Thus, when the material of the operation object is softer, the door-shaped gang nails can be too deep in the operation object due to the overlarge impact force of the nail gun, and even the nailing pieces can be seriously punched out of unsightly marks on the surface of the operation object. When the material of the operation object is harder, the door-shaped gang nails cannot completely enter the operation object due to insufficient impact force of the nail gun, so that the nailing failure is caused. Similarly, when different types of gate nails are used, the required impact kinetic energy is different, and the phenomenon of too deep or too shallow nailing is easy to occur. That is, the user needs to prepare and carry a plurality of line pressing nail guns with different specifications, and in the process of operation and use, the user needs to switch back and forth between different nail guns according to the material of the operation object, so that the carrying and the use are inconvenient.

Disclosure of Invention

The invention aims to solve the problem that the prior wire pressing nail gun is difficult to adapt to work objects with different materials and door nails with different types, thereby causing inconvenient use.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the utility model provides a multi-functional line ball nail rifle, includes the support body, rotates the handle of connection on the support body, sets up at the anterior impact element of support body, the first elastic element that is connected with impact element, the handle is correlated with impact element through laborsaving mechanism, the handle has a release position corresponding with the biggest displacement value of impact element, is equipped with on the support body with the switching mechanism that first elastic element correlated with and have first position and second position, when switching mechanism switches to the second position from first position, the biggest deflection of first elastic element corresponding with the release position of handle reduces.

It is known that when a user grasps a handle in a compression wire nail gun, the impact element associated with the effort-saving mechanism may be displaced by an effort-saving mechanism such as a lever, and accordingly the first resilient element deforms to store energy. When the handle reaches the release position, the impact element forms a maximum displacement value, and the deformation amount of the first elastic element reaches the maximum. When the handle is continuously held, the labor-saving mechanism is disconnected from the impact element, and the first elastic element releases the capability to enable the impact element to quickly act, so that the door-shaped nail is nailed into the operation object. Unlike the prior art, the frame body of the invention is provided with a switching mechanism associated with the first elastic element, so that when the switching mechanism is in the first position, the maximum deformation of the first elastic element corresponding to the release position of the handle reaches a set maximum value; when the switching mechanism is switched from the first position to the second position, the maximum deformation amount of the first elastic element corresponding to the release position of the handle is correspondingly reduced. It will be appreciated that when the maximum deformation of the first resilient element is reduced, the stored energy thereof is correspondingly reduced, thereby resulting in a reduction in the kinetic energy of the impact element during rapid actuation, and thus accommodating the use of different types of door pins and different material work objects. That is, the maximum deformation of the first elastic element before release is regulated by the switching mechanism, so that the aim of adapting to different material operation objects and different types of gate nails is conveniently achieved, the operation and the use are convenient, and the nailing quality and efficiency can be ensured.

Preferably, the impact element is a nailing plate which is arranged at the front part of the frame body in a vertically movable manner, the first elastic element is a plate spring with one end connected at the rear part of the frame body, the other end of the first elastic element is inserted into the upper part of the nailing plate, and the switching mechanism comprises a cam which is arranged on the frame body and is positioned at the upper side of the middle part of the first elastic element.

It is known that leaf springs provide a greater spring force with a smaller amount of deflection and store a greater amount of energy. In particular, when the handle moves the impact element upward by the effort-saving mechanism, the front portion of the first elastic element connected to the impact element is bent upward to be deformed to accumulate energy. At this time, the cam located at the upper side of the middle part of the first elastic element can be a supporting point of the first elastic element in a cantilever state. That is, the front portion of the first elastic element is bent upward with the cam as a fulcrum at this time. When we rotate the cam, we can conveniently change the up-down position of the cam as the supporting point of the first elastic element. Because the upward displacement value of the front end of the first elastic element is fixed, when the position of the supporting point in the middle of the first elastic element is changed up and down, the maximum bending deformation of the front part of the first elastic element can be changed, so that the impact kinetic energy of the impact element on the gate nail can be adjusted. It can be understood that the cam can design the shape of the working curved surface according to the requirement, and a plurality of positions capable of changing the maximum deformation of the first elastic element can be formed between the first position and the second position, so that the multi-gear adjustment of the energy storage of the first elastic element can be conveniently realized, and the multi-gear energy storage type door-type nail is suitable for the use requirements of various types of door-type nails and different operation objects.

Preferably, a positioning sleeve above the first elastic element is arranged on the inner side of the frame body, a notch is formed in one side, close to the first elastic element, of the positioning sleeve, the cam is a cylinder which is rotatably inserted into the positioning sleeve, a flat surface extending along the axial direction is arranged on the side face of the cam, and one end of the cam is in transmission connection with a control handle extending out of the frame body.

The cam is arranged into a cylinder, so that the cam can be reliably positioned in the positioning sleeve and can be conveniently rotated to switch different positions. The cam can be rotated to the cylindrical surface towards the first elastic element through the control handle, when the front part of the first elastic element is bent upwards, the cylindrical surface of the cam can be attached to the upper side surface of the middle part of the first elastic element through the notch of the positioning sleeve, at the moment, the contact point of the cam and the first elastic element is located at the lowest position, the first elastic element can form the largest upward bending deformation amount, and the cam is located at the first position. When the cam is rotated to the flat surface towards the first elastic element through the control handle and the front part of the first elastic element is bent and deformed upwards, the flat surface of the cam can be abutted against the upper side surface of the middle part of the first elastic element through the opening of the positioning sleeve, at the moment, the contact point of the cam and the first elastic element is positioned at the highest position, the first elastic element can form the minimum upward bending deformation, and the cam is positioned at the second position. It can be understood that the cross section of the cam with the flat surface is in a shape of a large half circle, so that on one hand, the cam can be reliably positioned in the positioning sleeve, and on the other hand, smooth transition between the flat surface and the cylindrical surface can be ensured, and the cam can be conveniently switched back and forth.

Preferably, the end part of the cam, which is far away from the control handle, is provided with an arc-shaped limit notch, and the bottom of the positioning sleeve is provided with a limit bump positioned in the limit notch.

When we rotate the cam, the spacing lug that is located spacing breach can contradict the both ends of spacing breach respectively to with the cam accurate, reliably fix a position in first position and second position, make things convenient for switching mechanism's round trip to switch, avoid the cam to lead to the nailing error because of the location inaccuracy.

Preferably, the edge of the cylindrical surface of the cam at one end of the opening of the positioning sleeve is provided with two positioning notches corresponding to the first position and the second position respectively, the inner side of the frame body is provided with a positioning bulge matched with the positioning notch, and the bottom of the positioning sleeve is provided with a second elastic element for pressing the cam, so that the positioning bulge is clamped in one of the positioning notches.

Because the positioning bulge is clamped in the positioning notch, the automatic rotation of the cam can be effectively prevented, and misoperation caused by the automatic rotation and switching of the cam is avoided. When the cam is required to rotate, the cam can be pressed firstly, and at the moment, the positioning protrusion is separated from the first positioning notch, so that the cam can be conveniently rotated. When the cam rotates in place, the cam can be loosened, and the second elastic element can drive the cam to move and reset, so that the positioning protrusion is clamped in the second positioning notch, and the cam is repositioned and cannot rotate.

Preferably, the rear end of the handle is hinged to the upper portion of the rear side of the frame body, the labor-saving mechanism comprises a lever which is arranged in the frame body along the front-rear direction, the front end of the lever is inserted into an insertion hole in the upper portion of the impact element, the rear end of the lever abuts against the lower side of the handle, a sliding groove is formed in the middle of the lever, a supporting pin which can move forwards and backwards and is positioned in the sliding groove is arranged in the frame body, and a reset spring which abuts against the upper side of the front end of the lever is arranged in the frame body.

The supporting pin positioned in the middle of the lever forms a fulcrum for the rotation of the lever. Because the rear end of the handle is hinged to the upper part of the rear side of the frame body, when people press the front part of the handle and rotate the handle downwards, the rear part of the handle props against the rear end of the lever, so that the rear end of the lever rotates downwards, and at the moment, the front end of the lever is lifted upwards, so that the nailing sheet is driven to move upwards. It will be appreciated that when the lever is in a horizontal state, the length of the front end of the lever inserted into the insertion hole of the impact element is longest; when the front end of the lever continues to rotate upwards, the front end of the lever gradually withdraws from the inserting hole; when the handle rotates to the release position, the lever is inclined with the front part high and the rear part low, at the moment, the front end of the lever completely withdraws from the inserting hole to be separated from the impact element, and the first elastic element can drive the impact element to rapidly move downwards to punch out the gate nail. At this time, the user releases the handle, the front end of the lever can rotate downwards to reset by the reset spring, the front end of the lever can push the impact element and reenter the inserting hole of the impact element, and correspondingly, the rear end of the lever jacks up the handle to reset the handle. In particular, the supporting pin of the invention is movably positioned in the sliding groove in the middle of the lever back and forth, so that when the lever is initially in a tilting state with low front and high rear, the supporting pin is positioned at the rear end in the sliding groove, and the front end of the lever extends into the inserting hole of the impact element; when the handle rotates to the release position, the lever is in a tilting state with high front and low rear, the lever can move backwards at the moment, correspondingly, the supporting pin is shifted from the rear end of the sliding groove to the front end of the sliding groove for positioning, and the front end of the lever exits from the inserting hole of the impact element, so that the lever is separated from the impact element.

It will be appreciated that when the impact member is moved down rapidly to punch the gate pin downwardly, the forward portion of the gun is subjected to an upward recoil force. Therefore, the front part of the nail gun is liable to jump upward during nailing. Because the rear end of the handle is hinged to the upper part of the rear side of the frame body, that is, when a user presses and rotates the handle, a downward acting force is formed on the front part of the handle, namely the front part of the nail gun, so that the upward recoil acting force applied to the front part of the nail gun can be greatly counteracted, and the condition that the front part of the nail gun jumps upwards in use can be effectively avoided.

Preferably, the two side edges of the lever are respectively provided with a turned-over edge which is bent downwards, the edge of the turned-over edge is provided with the sliding groove, the bottom of the sliding groove comprises a circular arc-shaped front positioning concave and a rear positioning concave which are connected together, the supporting pin is positioned in the rear positioning concave, and when the handle is pressed down to a release position, the supporting pin moves from the rear positioning concave to the front positioning concave.

The lever is formed by stamping a plate, so that the lever is beneficial to saving materials and improving production efficiency. The flanges are arranged at the edges of the two sides of the lever, so that the lever forms a channel steel-like structure, and the strength and the rigidity of the lever are improved. In particular, the bottom of the sliding groove is provided with the circular arc-shaped front positioning groove and the circular arc-shaped rear positioning groove, so that a bulge is formed at the joint of the front positioning groove and the rear positioning groove. Thus, when the handle is depressed to the release position, the rear end of the lever is rotated downward and the front end of the lever is lifted upward, at which time the support pin is moved from the rear positioning recess over the boss into the front positioning recess. It will be appreciated that the presence of the projection causes the bearing pin to form an instantaneous jump when moving from the rear positioning recess to the front positioning recess, so that the rearward movement of the lever and the separation from the impact element are in an instantaneous action so as to adapt to the instantaneous release of the first elastic element and the instantaneous downward phase shift of the impact element, thereby facilitating the improvement of the impact kinetic energy of the impact element, ensuring the accuracy of the separation time of the lever from the impact element and further improving the stability of the impact kinetic energy formed by the impact element.

Preferably, a blocking pin with left and right ends connected to the inner side wall of the frame body is arranged in the frame body, a sliding inclined plane is arranged on the lever, and when the handle is pressed down to the release position, the blocking pin abuts against the sliding inclined plane, so that the lever moves backwards, and the supporting pin moves from the rear positioning recess to the front positioning recess.

The invention arranges the stop pin in the frame body, thus, when the handle is pressed down to rotate to the release position, the sliding inclined surface on the lever contacts the stop pin, and the stop pin can form an axial backward acting force on the lever, thereby ensuring that the lever is pulled out from the insertion hole of the impact element, further ensuring the reliability of lever action, and ensuring that the impact kinetic energy formed by the impact element by the first elastic element is consistent when the first elastic element is released each time.

Preferably, front arc-shaped concave and rear arc-shaped concave which are connected front and back are arranged on the lower side of the handle, a roller which is abutted against the front arc-shaped concave is arranged at the rear end of the lever, and the radius of the front arc-shaped concave and the radius of the rear arc-shaped concave are larger than the radius of the roller.

It will be appreciated that when we depress the handle, the lever will rotate with it and the position of the point of contact of the rear end of the lever with the handle will move accordingly. The invention sets front arc concave and back arc concave which are connected in front and back on the lower side of the handle, and sets roller on the back end of the lever. Therefore, rolling friction can be formed between the rear end of the lever and the handle, so that friction resistance between the lever and the handle during rotation is greatly reduced. In particular, the radius of the front and rear arcuate recesses is greater than the radius of the roller, i.e., the roller and the front and rear arcuate recesses form tangential line contacts. When the handle is pressed down and the lever is gradually rotated, the contact point of the lever and the handle gradually moves backwards, that is, the roller moves backwards in the front arc-shaped concave and gradually approaches the junction point of the front arc-shaped concave and the rear arc-shaped concave, the rear end of the lever can accelerate to rotate downwards, the rotation angle of the lever is increased on the premise of the same handle size and rotation angle, and the rotation stroke of the handle and the overall size of the whole nail gun can be reduced. By reasonable design, when the handle reaches the release position, the roller just reaches the junction point of the front arc-shaped concave and the rear arc-shaped concave. At this time, the lever moves backward under the action of the stop pin to be separated from the impact element, and the roller on the lever can pass through the junction point of the front arc-shaped concave and the rear arc-shaped concave and enter the rear arc-shaped concave. When the handle is released, the return spring can push the lever to reversely rotate and gradually reset, and the roller at the rear end of the lever rolls in the rear arc-shaped concave firstly. When the lever rotates to the horizontal position, the roller gradually moves forward and enters the front arc-shaped recess, and at the moment, the front arc-shaped recess can form a forward component force to the rear end of the lever through the roller, so that the component force acts together with the reset spring, and the lever moves forward to be reinserted into the inserting hole of the impact element.

Preferably, a nail storage cavity arranged along the front-back direction is formed in the bottom of the frame body, two left and right guide rails are arranged in the nail storage cavity, the rear ends of the guide rails are fixedly connected in the frame body, so that a first nail outlet width is formed between the two guide rails, a sliding cover capable of moving up and down is arranged at the front end of the frame body, the sliding cover is associated with the front end of the guide rail on the corresponding side through two left and right push blocks, and when the sliding cover moves downwards to an adjusting position, the push blocks enable the front ends of the guide rails to move inwards, so that a second nail outlet width is formed at the front ends of the two guide rails.

The rear ends of the left and right guide rails are fixedly connected with the frame body, and of course, in an initial state, the two guide rails are parallel to each other similarly to the prior art, and the space between the two guide rails forms a first nail discharging width. When the sliding cover is moved downwards, the two pushing blocks can be driven to move, so that the front ends of the left guide rail and the right guide rail are pushed to relatively move inwards to approach. That is, the two guide rails are approximately tapered with small front and large rear, and correspondingly, the front ends of the two guide rails form a second staple discharging width smaller than the first staple discharging width, so that the door-shaped staples with different widths and specifications can be used. It can be understood that by arranging the positioning structure for positioning the sliding cover, the sliding cover has a plurality of positioning positions, and correspondingly, a plurality of different nail discharging widths can be formed between the front ends of the two guide rails, so that the invention can adapt to the use of a plurality of gate nails with different specifications and widths. It is known that the staple discharging channel between the guide rails is firstly used for storing the gate type row staples, and the width of the front end of the staple discharging channel is really positioned in the left-right direction of the gate type staples at the staple discharging opening. When the pushing mechanism in the nail storage cavity elastically pushes the gate-type gang nails in the nail pushing-out channel, the front ends of the gate-type gang nails can be automatically centered and positioned.

Therefore, the invention has the following beneficial effects: the nailing machine is suitable for different material working objects and different types of door nails, is convenient to operate and use, and can ensure the nailing quality and efficiency.

Drawings

Fig. 1 is a schematic view of a structure of the present invention.

Fig. 2 is a schematic view of the structure of the present invention with the left side housing removed.

Fig. 3 is an enlarged view at a in fig. 2.

Fig. 4 is a schematic structural view of the control handle.

Fig. 5 is a schematic view of the structure of the cam.

Fig. 6 is a schematic structural view of the lever.

Fig. 7 is a schematic view of a connection structure of the sliding cover and the frame body.

Fig. 8 is a schematic view of the structure of the front end of the guide rail.

In the figure: 1. the hand-held device comprises a frame body 11, a shell 12, a hand holding hole 14, a guide rail 141, a transition piece 142, an outer baffle 15, a positioning sleeve 151, a baffle pin 16, a supporting pin 2, a handle 21, a front arc-shaped concave 22, a rear arc-shaped concave 3, an impact element 31, a U-shaped notch 4, a first elastic element 5, a cam 51, a flat surface 52, a limit notch 53, a positioning notch 6, a control handle 61, a rotating rod 611, a connector 62, a toggle rod 7, a lever 71, a U-shaped fork 72, a flanging 721, a sliding inclined plane 722, a front positioning concave 723, a rear positioning concave 73, a roller 74, a positioning convex column 8, a return spring 9, a sliding cover 91, a push block 911, a push inclined plane 912 and a return inclined plane.

Detailed Description

The invention is further described below with reference to the drawings and detailed description.

As shown in fig. 1 and 2, a multifunctional line ball nail gun comprises a frame body 1 made of plastic, a handle 2 rotatably connected to the frame body, an impact element 3 arranged at the front part of the frame body, and a first elastic element 4 connected with the impact element, wherein the handle is associated with the impact element through a labor-saving mechanism so as to drive the impact element to act by pressing the handle, and the first elastic element connected with the impact element is deformed to store energy. When the handle is pressed to rotate downwards, the handle has a release position corresponding to the maximum displacement value of the impact element. That is, when the handle reaches the release position, the impact element reaches the maximum displacement value, and correspondingly, the first elastic element reaches the maximum deformation, and at the moment, the handle and the impact element are separated from each other, the first elastic element can instantly release the deformation energy, so that the impact element can rapidly move to punch out the gate nail, and the action of nailing once is completed.

In order to enable the impact element of the nail gun to generate different impact kinetic energy so as to adapt to different operation objects or different specifications of door nails, the invention is provided with a switching mechanism which is associated with the first elastic element and can be switched from a first position to a second position on the frame body. When the switching mechanism is switched from the first position to the second position, the maximum deformation amount of the first elastic member corresponding to the release position of the handle is reduced. That is, the maximum amount of deformation of the first elastic element is greater when the handle reaches the release position when the switching mechanism is in the first position, and is smaller when the handle reaches the release position when the switching mechanism is in the second position. It will be appreciated that when the maximum deformation of the first resilient element is reduced, the stored energy thereof is correspondingly reduced, thereby resulting in a reduction in the kinetic energy of the impact element during rapid actuation, and thus accommodating the use of different types of door pins and different material work objects. That is, the maximum deformation of the first elastic element before release is regulated by the switching mechanism, so that the aim of adapting to different material operation objects and different types of gate nails is conveniently achieved, the operation and the use are convenient, and the nailing quality and efficiency can be ensured.

For convenient processing and assembly, the frame body can be composed of a left shell 11 and a right shell 11 which are spliced, and an oblong holding hole 12 which is arranged front and back is arranged in the middle of the frame body, so that an operator can hold the frame body conveniently. Of course, we need to set a rectangular nail storage cavity arranged along the front-back direction at the bottom of the hand holding hole on the frame body, set left and right two sheet guide rails 14 in the nail storage cavity, and the two guide rails are vertically set, so as to form a nail outlet channel between the two guide rails for accommodating the gate-type chain nails, and set a nail outlet at the front of the nail storage cavity, and set a pushing mechanism capable of elastically pushing the gate-type chain nails at the rear of the nail storage cavity. Because the basic structure of the wire pressing nail gun belongs to the prior art, the wire pressing nail gun is not described in detail herein.

In this embodiment, the direction in which the side of the frame body where the nail outlet is provided is referred to as the front side or front end, and the opposite side is referred to as the rear side or rear end, and the left and right sides are determined accordingly. Further, the front-rear direction is referred to as the longitudinal direction, the left-right direction is referred to as the lateral direction, the side closer to the inside of the frame body is referred to as the inside, and the side farther from the inside of the frame body and toward the left and right sides of the frame body is referred to as the outside.

Preferably, the impact element is a rectangular nailing piece formed by punching a plate, the left and right inner side walls of the front part of the frame body can be provided with sliding grooves which are arranged along the up-down direction, and the left and right sides of the nailing piece are respectively and slidably connected in the sliding grooves on the corresponding side, so that the vertical nailing piece can move up and down. The first elastic element is a plate spring positioned above the hand holding hole so as to form larger elastic force under smaller deformation and store larger energy. The rear end of the plate spring is rotatably connected to the rear part of the frame body, and the front end of the plate spring is inserted into the insertion hole at the upper part of the nailing piece, so that the nailing piece can move upwards to drive the plate spring to bend upwards to deform so as to store energy, and meanwhile, the plate spring and the nailing piece are convenient to install and connect.

As a preferred solution, the switching mechanism comprises a cam 5 provided on the frame at the upper side of the middle of the first elastic element. It is known that when the handle moves the impact member upwardly by the labor-saving mechanism, the front portion of the first elastic member connected to the impact member is bent upwardly to accumulate energy. At this time, the upper side of the middle part of the first elastic element is abutted against the cam, that is, the contact point between the cam and the first elastic element becomes a supporting point when the first elastic element is bent upwards, and at this time, the front part of the first elastic element is bent upwards by taking the contact point as a fulcrum. When we turn the cam, we can conveniently change the up-down position of the switching contact point. When the position of the contact point is lower, the displacement value of the front end of the first elastic element relative to the supporting point is larger, and the maximum bending deformation amount is larger; when the contact point is higher, the displacement value of the front end of the first elastic element relative to the supporting point is smaller, and the maximum bending deformation amount is smaller. On the premise that the upward displacement value of the front end of the first elastic element is fixed, the position of the contact point between the cam and the first elastic element is changed up and down by rotating the cam, so that the maximum bending deformation of the front part of the first elastic element can be changed conveniently, and the impact kinetic energy of the impact element on the gate nail can be adjusted. The shape of the working curved surface of the cam can be designed according to the requirement, so that a plurality of positions capable of changing the maximum deformation of the first elastic element are formed between the first position and the second position, thereby realizing multi-gear adjustment of the energy storage of the first elastic element, and being suitable for the use requirements of various types of door nails and different operation objects.

As another preferable scheme, as shown in fig. 1, 2 and 3, a positioning sleeve 15 which is arranged above the first elastic element and transversely is arranged on the inner side wall of the right side shell of the frame body, and a notch which extends to the inner side wall of the right side shell is arranged on the lower side of the positioning sleeve close to the first elastic element, so that the cross section of the positioning sleeve is in a C shape. The cam is a cylinder which is rotatably fitted in the positioning sleeve, and a flat surface 51 extending in the axial direction is provided on the side surface of the cam, so that the cross section of the cam is a half circle so as to ensure the reliable positioning of the cam in the positioning sleeve. In addition, the left end of the cam, which is positioned at the opening of the positioning sleeve, is in transmission connection with a control handle 6 which extends out of the frame body. Of course, the central angle of the notch on the positioning sleeve should be larger than the central angle of the flat surface on the cam, so as to ensure that the cam can partially extend out of the notch to contact with the first elastic element.

Preferably, a transition fillet can be arranged between the flat surface and the cylindrical surface on the cam, so that the cam can be conveniently switched back and forth, and the first elastic element is ensured to elastically press against the cam when being installed in the frame body. That is, the first elastic element has a smaller pretensioning force, so that the cam can be prevented from falling out of the notch of the positioning sleeve.

When the control handle is rotated to enable the cam to rotate until the cylindrical surface faces the first elastic element, the cylindrical surface of the cam is abutted against the upper side face of the middle of the first elastic element, at the moment, the contact point of the cam and the first elastic element is located at the lowest position, the first elastic element can form the largest upward bending deformation amount, and the cam is located at the first position. When the cam is rotated to the flat surface towards the first elastic element through the control handle, the flat surface of the cam is abutted against the upper side surface of the middle part of the first elastic element, at the moment, the contact point of the cam and the first elastic element is positioned at the highest position, the first elastic element can form the minimum upward bending deformation, and the cam is positioned at the second position.

Further, one end of the cam provided with the control handle is provided with a regular polygon connecting hole or a round hole with a left flat surface and a right flat surface, and the other end of the cam is provided with a counter bore; correspondingly, as shown in fig. 4, the control handle comprises a rotating rod 61, a regular polygon connector 611 is arranged at the inner end of the rotating rod, or a cylindrical connector with left and right flat surfaces is arranged at the outer end of the rotating rod, a poking rod 62 perpendicular to the rotating rod is arranged at the outer end of the rotating rod, the connector is matched in the connecting hole, a screw in threaded connection with the connector is arranged in a counter bore of the cam, and the cam is driven to rotate by rotating the control handle.

In addition, as shown in fig. 5, we can also set an arc-shaped limit notch 52 at the edge of the cylindrical surface of one end of the cam far away from the control handle, and set a limit bump located in the limit notch at the bottom of the positioning sleeve. Like this, when we rotate the cam, the spacing lug that is located spacing breach can contradict the both ends of spacing breach respectively to with the cam accurate, reliably fix a position in first position and second position, make things convenient for switching mechanism's round trip to switch, avoid the cam to lead to the nailing error because of the location inaccuracy.

In addition, the cam is provided with a plurality of positioning notches 53 which are arranged at equal intervals in the circumferential direction at the edge of the cylindrical surface at one end of the opening of the positioning sleeve, positioning protrusions which are matched with the positioning notches are arranged at the inner side of the frame body, and meanwhile, the bottom of the positioning sleeve is provided with a pressing cam and a second elastic element which is composed of a cylindrical pressure spring, so that the positioning protrusions are elastically clamped in one of the positioning notches. The positioning bulge clamped in the positioning notch can effectively prevent the cam from rotating automatically, so that misoperation caused by automatic rotation and switching of the cam is avoided. When the cam is required to rotate, the control handle can be pressed first, so that the cam overcomes the elasticity of the second elastic element and moves inwards, and at the moment, the positioning protrusion is separated from the first positioning notch, and the cam can be driven to rotate by rotating the control handle. When the cam rotates in place, the control handle can be loosened, and the second elastic element can enable the cam to move outwards to reset, so that the positioning protrusion is clamped in the second positioning notch, and the cam is repositioned and cannot rotate.

Preferably, the number of the positioning notches is three, and the number of the positioning protrusions is two, and the interval between two positioning protrusions is the same as the interval between two adjacent positioning notches. Therefore, the second elastic element enables the two positioning bulges to be elastically clamped in the two positioning notches, so that the torsional strength of the control handle relative to the frame body can be improved. When the control handle is pressed, the positioning protrusion is separated from the positioning notch, and the control handle can be rotated to drive the cam to rotate. When the cam rotates in place, the control handle can be loosened, and the second elastic element enables the cam to move outwards to reset, and the two positioning protrusions are clamped in the two positioning gaps at the back, so that the cam is repositioned and cannot rotate.

It is known that when the impact member is moved down rapidly to blow the gate pin downwardly, the forward portion of the gun is subjected to an upward recoil force. Therefore, the front part of the nail gun is liable to jump upward during nailing. For this purpose, the rear end of the elongated handle can be hinged to the upper rear side of the frame, i.e. the rotatable front part of the handle is located on the front side of the nail gun in the present invention. When nailing is needed, a user holds the holding hole and the handle of the rack body and presses the front part of the handle downwards, so that the front part of the handle rotates downwards relative to the rack body, at the moment, the front part of the handle, namely the front part of the nail gun, is subjected to downward acting force by the hand of the user, so that the upward recoil acting force applied to the front part of the nail gun can be greatly counteracted, and the condition that the front part of the nail gun jumps upwards in use is effectively avoided.

As shown in fig. 2, 3 and 6, the labor-saving mechanism of the invention comprises a lever 7 longitudinally arranged on the upper side of the first elastic element in the frame body, the lever is inclined in a front low and rear high way, and the left and right sides of the upper part of the nailing piece are respectively provided with a U-shaped notch 31 so as to form a splicing hole. The front end of the lever is provided with a U-shaped fork 71 which is inserted into the left U-shaped notch and the right U-shaped notch, the rear end of the lever abuts against the lower side of the handle, the middle part of the lever is provided with a sliding groove, the frame body is internally provided with a supporting pin 16 transversely positioned in the sliding groove, and the supporting pin positioned in the middle part of the lever forms a fulcrum for the rotation of the lever. Because the lever is inclined with the front lower and the rear higher, and the front and the rear ends of the lever receive downward acting forces of the nailing piece and the handle respectively, the lever supported on the supporting pin is in a forward moving trend, and the supporting pin is positioned at the rear end of the sliding groove.

When a user presses the front part of the handle downwards and rotates the handle downwards, the rear part of the lever abuts against the rear end of the lever, so that the rear end of the lever rotates downwards, and at the moment, the front end of the lever is lifted upwards, so that the nailing piece is driven to move upwards. It will be appreciated that when the lever is in a horizontal state, the length of the front end of the lever inserted into the insertion hole of the impact element is longest; when the front end of the lever continues to rotate upwards, the front end of the lever gradually withdraws from the inserting hole; when the handle rotates to the release position, the lever is inclined with the front part high and the rear part low, at the moment, the front end of the lever is completely withdrawn from the inserting hole and separated from the impact element, and the first elastic element can drive the nailing piece to rapidly move downwards to punch out the door-shaped nail. When the handle is rotated to the release position, the lever is inclined in a front-high and rear-low manner, so that the lever supported on the supporting pin moves backward rapidly, the supporting pin is shifted from the rear end of the sliding groove to the front end of the sliding groove for positioning, and the front end of the lever is pulled out of the insertion hole of the nailing piece by a certain distance.

In order to facilitate the resetting of the lever and the handle, a reset spring 8 which is pressed against the upper side of the front end of the lever can be arranged in the frame body. Thus, when the user finishes nailing and releases the handle, the first elastic element enables the nailing piece to be positioned at the impact position of the lower side, the reset spring pushes the front end of the lever to rotate downwards to reset, and the rear end of the lever pushes the handle upwards to enable the front part of the handle to be lifted upwards to reset. Since a certain distance is formed between the front end of the lever and the nailing piece at this time, the nailing piece does not form an obstacle to the rotation of the lever. When the handle is completely reset, the lever is positioned in an inclined shape with a lower front and a higher rear, at the moment, the lever supported on the supporting pin can rapidly move forwards, and the supporting pin is shifted from the front end of the sliding groove to the rear end of the sliding groove for positioning, so that the front end of the lever reenters the inserting hole of the nailing piece.

Preferably, the return spring can be a pagoda-shaped pressure spring with a big top and a small bottom, a positioning convex column 74 is arranged on the upper side of the front end of the lever, and the lower end of the return spring is sleeved on the positioning convex column to avoid the displacement of the return spring. Because the pagoda-shaped pressure spring has the advantages of small volume and large elasticity, the pagoda-shaped pressure spring is beneficial to reducing the outline dimension and is suitable for being used in a narrow space in a frame body.

In order to facilitate the processing of the lever, flanges 72 bent downwards can be respectively arranged at the two side edges of the lever, so that the lever forms a channel steel-like structure, the strength and the rigidity of the lever are improved, and the lever can be formed by stamping by adopting plates. In addition, the sliding grooves are respectively arranged at the edges of the flanges on the two sides, that is to say, the sliding grooves are opened at the edges of the flanges, so that the connection of the sliding grooves and the supporting pins is facilitated when the lever is installed.

In order to ensure that the lever can move forwards and backwards when rotating up and down, a stop pin 151 which is transversely arranged can be embedded on the outer side wall of the positioning sleeve, and two ends of the stop pin are respectively inserted on the inner side walls of the left and right shells, so that the installation of the stop pin is convenient. In addition, trapezoid grooves with large openings and small inner openings are arranged at the edges of the turned edges on two sides of the lever, and the rear side edges of the trapezoid grooves form sliding inclined planes 721. When the user presses the handle downwards to the release position, the rear end of the lever rotates downwards, the sliding inclined surface contacts with the blocking pin at the moment, the blocking pin forms a backward reaction force on the sliding inclined surface, so that the lever moves backwards, the front end of the lever is ensured to be pulled out from the inserting hole of the nailing piece and separated from a certain distance, and the supporting pin moves from the rear positioning recess to the front positioning recess.

Preferably, the bottom of the sliding groove includes a front positioning recess 722 and a rear positioning recess 723 in the shape of circular arcs connected together, so that a protrusion is formed at the junction of the front and rear positioning recesses, and the support pin is located in the rear positioning recess. When the front part of the handle is pressed down to the release position, the rear end of the lever rotates downwards, the front end of the lever lifts upwards, the lever moves backwards under the action of the sliding inclined plane, and the supporting pin moves from the rear positioning concave to the front positioning concave beyond the bulge for positioning. That is, the support pin is ultimately positioned within the rear locating recess, thereby enabling the lever to rotate about the support pin. When the lever receives the acting force of the sliding inclined plane, the bulge can instantly cross the supporting pin to enable the lever to quickly move backwards, the lever and the impact element are quickly separated so as to be instantly released by the first elastic element and instantly downwards phase-shifting and adapting to the nailing piece, impact kinetic energy of the impact element is favorably improved, accuracy of separation time of the lever and the impact element is ensured, and stability of impact kinetic energy formed by the impact element is further improved.

It will be appreciated that when we depress the handle to turn the lever, the position of the point of contact of the rear end of the lever with the handle will move back and forth accordingly. For this purpose, a roller 73 may be provided at the rear end of the lever to be abutted against the lower side of the handle, so that rolling friction is formed between the rear end of the lever and the handle, thereby greatly reducing friction resistance between the lever and the handle when the lever is rotated. Further, we can also set front arc-shaped concave 21 and back arc-shaped concave 22 connected in front and back on the underside of the handle, the roller at the back end of the lever is abutted against the front arc-shaped concave, and the radius of the front and back arc-shaped concave is larger than that of the roller, so that the roller and the front and back arc-shaped concave can form tangent line contact. Of course, the center-to-center distance of the front and rear arcuate recesses should be less than the sum of the radii of the front and rear arcuate recesses so that a slightly convex interface is formed between the front and rear arcuate recesses.

When the handle is pressed down, the rear end of the lever with the front lower part and the rear higher part gradually rotates downwards, the contact point of the lever and the handle gradually moves backwards, that is, the roller moves backwards in the front arc-shaped concave part and gradually approaches to the junction point of the front arc-shaped concave part and the rear arc-shaped concave part, at the moment, the rear end of the lever can be accelerated to rotate downwards by the front arc-shaped concave part, the rotation angle of the lever can be increased on the premise of the same handle size and rotation angle, and the rotation stroke of the handle and the overall size of the whole nail gun can be reduced. When the handle reaches the release position, the roller just reaches the junction point of the front arc-shaped concave and the rear arc-shaped concave. At this time, the lever moves backward under the action of the stop pin to be separated from the impact element by a certain distance, and the roller on the lever passes over the junction point of the front arc-shaped recess and the rear arc-shaped recess and enters the rear arc-shaped recess. It will be appreciated that the front side of the rear arcuate recess forms a rearward component of force to the roller at this point, thereby facilitating acceleration of the lever rearward and engagement of the roller in the intermediate position of the rear arcuate recess.

When the handle is released, the reset spring can push the lever to reversely rotate to the horizontal position from the front high-back low-inclination state, at the moment, the roller at the rear end of the lever rolls backwards in the rear arc-shaped recess, and the rear side of the rear arc-shaped recess forms a forward component force on the roller. When the handle continues to rotate upwards, the rear end of the lever is lifted upwards to be inclined with the front lower part and the rear higher part, the lever moves forwards under the action of the front end reset spring, the roller gradually moves forwards and enters the front arc-shaped concave, and at the moment, the rear side of the front arc-shaped concave can form a forward component force to the rear end of the lever through the roller, so that the lever moves forwards and reinserts into the inserting hole of the impact element under the combined action of the roller and the reset spring.

In order to adapt to the use of the gate-type chain riveting with different specifications and widths, as shown in fig. 1, 7 and 8, the rear ends of the guide rails arranged in the nail storage cavity are fixedly connected in the frame body, and a first nail outlet width which is fixed and unchanged is formed between the rear ends of the two guide rails. In addition, a U-shaped sliding cover 9 capable of moving up and down is arranged on the outer side of the front end of the frame body in a wrapping mode, two pushing blocks 91 which are fixedly connected to the left side and the right side of the sliding cover are arranged in the frame body, vertical sliding holes are formed in positions, corresponding to the pushing blocks, of the frame body, the pushing blocks are fixed to the two sides of the sliding cover through screws located in the sliding holes, and accordingly the sliding cover can drive the pushing blocks on the left side and the right side to move up and down. In addition, a rectangular notch is arranged on the upper side of the front end of the guide rail, a transition strip 141 extending outwards integrally is arranged on the rear side of the rectangular notch, an outer baffle strip 142 extending forwards integrally is arranged at the end part of the transition strip, a pushing inclined surface 911 inclining outwards from top to bottom is arranged on the inner side of the pushing block, a reset inclined surface 912 inclining outwards from top to bottom is arranged on the outer side of the rear part of the pushing block, the pushing inclined surface is abutted against the upper side edge of the guide rail, and the reset inclined surface is abutted against the outer baffle strip, so that the sliding cover is related with the front end of the guide rail on the corresponding side through the left pushing block and the right pushing block.

When the sliding cover drives the pushing block to move downwards, the pushing inclined plane can push the front ends of the left guide rail and the right guide rail to move inwards relatively to approach, at the moment, the nail outlet channel between the two guide rails is in a conical shape with small front and large rear, and correspondingly, the front ends of the two guide rails form a second nail outlet width smaller than the first nail outlet width. When the gate-type chain riveting with smaller width is put into the nail discharging channel, the pushing mechanism in the nail storage cavity elastically pushes the gate-type chain riveting, so that the front end of the gate-type chain riveting is automatically centered and positioned, and the invention can be suitable for the use of gate-type nails with different specifications and widths. It can be understood that by arranging the positioning structure for positioning the sliding cover, the sliding cover has a plurality of positioning positions, and correspondingly, a plurality of different nail discharging widths can be formed between the front ends of the two guide rails, so that the invention can adapt to the use of a plurality of gate nails with different specifications and widths.

When the sliding cover drives the pushing block to move upwards, the reset inclined plane can push the outer blocking strips on the left guide rail and the right guide rail to move outwards oppositely to leave, and at the moment, the gap between the front ends of the two guide rails is gradually increased to the first nail outlet width.

It should be noted that, the inclination angles of the pushing inclined plane and the reset inclined plane should be consistent with each other, so as to avoid interference with the guide rail when the pushing block moves.

Claims (8)

1. The utility model provides a multi-functional line ball nail rifle, includes the support body, rotate the handle of connecting on the support body, set up the impact element in the support body front portion, the first elastic element that is connected with the impact element, the handle is through laborsaving mechanism and impact element correlation, the handle has a release position corresponding with the biggest displacement value of impact element, characterized by is equipped with on the support body and has the switching mechanism of first position and second position with first elastic element correlation, when switching mechanism switches to the second position from first position, the biggest deflection of first elastic element corresponding with release position of handle reduces, laborsaving mechanism includes the lever of arranging in the support body along fore-and-aft direction, is equipped with the retaining pin of left and right sides connection on the support body lateral wall in the support body, the middle part of lever is equipped with the slide groove in the support body with the back-and-forth movement, be equipped with the slide slope on the lever both sides edge respectively, be equipped with down turn-ups at the edge of turn-ups, the bottom of slide groove is including connecting in the arc when the recess is located to the recess when the location is located to the recess in the support position.

2. The multifunctional wire pressing nail gun according to claim 1, wherein the impact element is a nailing sheet which is arranged at the front part of the frame body in a vertically movable mode, the first elastic element is a plate spring with one end connected to the rear part of the frame body, the other end of the first elastic element is inserted into the upper part of the nailing sheet, and the switching mechanism comprises a cam which is arranged on the frame body and is positioned at the upper side of the middle part of the first elastic element.

3. The multifunctional line ball nail gun of claim 2, wherein the inside of the frame body is provided with a positioning sleeve above the first elastic element, the positioning sleeve is provided with a notch at one side close to the first elastic element, the cam is a cylinder rotatably inserted in the positioning sleeve, the side surface of the cam is provided with a flat surface extending along the axial direction, and one end of the cam is in transmission connection with a control handle extending out of the frame body.

4. A multifunctional line ball nail gun according to claim 3, characterized in that the end of the cam away from the control handle is provided with an arc-shaped limit notch, and the bottom of the positioning sleeve is provided with a limit bump positioned in the limit notch.

5. A multifunctional line ball nail gun according to claim 3, wherein the cam is provided with two positioning notches corresponding to the first position and the second position at the edge of the cylindrical surface at one end of the opening of the positioning sleeve, the inner side of the frame body is provided with a positioning bulge matched with the positioning notch, and the bottom of the positioning sleeve is provided with a second elastic element for pressing the cam, so that the positioning bulge is clamped in one of the positioning notches.

6. The multifunctional line ball nail gun of claim 1, wherein the rear end of handle articulates in support body rear side upper portion, and the front end of lever is pegged graft in the spliced eye of impact element upper portion, and the rear end of lever supports the downside of handle, is equipped with the reset spring that supports the upper side of lever front end in the support body.

7. The multifunctional line ball nail gun of claim 1, wherein the front arc sunken and the back arc sunken that link to each other around being equipped with in the downside of handle, the rear end of lever is equipped with the gyro wheel that leans on the front arc sunken, the radius of front and back arc sunken is greater than the radius of gyro wheel.

8. The multifunctional line ball nail gun of claim 1, wherein a nail storage cavity that is arranged along fore-and-aft direction is arranged in the bottom of the frame body, two left and right guide rails are arranged in the nail storage cavity, the rear ends of the guide rails are fixedly connected in the frame body, so that a first nail outlet width is formed between the two guide rails, the front end of the frame body is provided with a sliding cover capable of moving up and down, the sliding cover is associated with the front end of the guide rail on the corresponding side through two left and right push blocks, and when the sliding cover moves downwards to an adjusting position, the push blocks enable the front ends of the guide rails to move inwards, so that a second nail outlet width is formed at the front ends of the two guide rails.