Nail gun capable of preventing idle hitting

Abstract

The invention discloses an anti-idle-hitting nail gun which comprises an energy storage mechanism and a nailing mechanism. The nail gun comprises a firing pin in a nailing base, and the firing pin strikes a fastener through energy accumulated by the energy storage mechanism. A striking mechanism is further arranged at the front end of the nailing seat, the striking mechanism can slide relative to the nailing seat, and the striking mechanism is arranged at the front end of the firing pin and abuts against the workpiece; the lifting mechanism is used for pushing the firing pin to move in the direction opposite to the striking direction; the nail box is used for storing nails; a nail pushing mechanism for pushing a nail to the nailing seat is arranged in the nail box, a telescopic retainer is arranged on the nail pushing mechanism, and the striking mechanism is provided with a striking arm matched with the retainer; when the number of the nails in the nail box is larger than the preset number, the head end of the retainer and the striking arm are in a separated state; when the number of nails in the nail box is below the preset number, the head end of the retainer is inserted into the translation track of the striking arm to prevent the striking arm from moving. According to the invention, the phenomenon of'empty gun 'when the number of fasteners is insufficient can be completely eradicated.

Description

Technical Field

[0001] The invention relates to an anti-air-driving nail gun, in particular to an electric nail gun, belonging to the technical field of tools. Background Art

[0002] With the development of battery technology, electric nail guns are becoming more and more popular with users due to their convenience and other advantages. Take the electric wood nail gun as an example, it includes an energy storage mechanism, a striking mechanism, a nailing mechanism, a lifting mechanism, and a nail feeding mechanism; the nail feeding mechanism can feed wood nails into the nailing mechanism for the firing pin to hit; when the number of wood nails is insufficient, the locking block in the nail feeding mechanism will stop the striking mechanism from moving, thereby preventing the striking switch from being turned on, making it impossible to nail, and prompting the user to add fasteners (i.e. nails) to the nail box.

[0003] Since electric nail guns have large kinetic energy and fast nailing speed, most existing nail guns are equipped with safety mechanisms, but they can only prevent the tool from being accidentally triggered and fired. Therefore, they can only ensure the safety of the tool during storage and transportation, but cannot prevent the tool from being fired when there is no fastener in the nail magazine. There are still hidden dangers - when firing without a fastener, the firing pin may damage the surface of the workpiece and affect the product quality; multiple firings without fasteners may also damage internal structural parts and shorten the service life of the tool.

[0004] In the prior art, some nails are often reserved in the nail magazine to achieve the empty-driving protection of the nail gun. For example, the technical solution described in US6966477B1, when switching from normal nailing to the anti-empty-driving state, the nail pushing mechanism cannot provide effective thrust for the nail to enter the nailing channel in the nailing seat. As a result, the nail pushing mechanism cannot push the nail into place, and the empty-driving phenomenon of the nail gun cannot be avoided. If the nail is stuck between the nailing channel and the nail feeding mechanism, the nail may be stuck.

[0005] like Figure 10 As shown, the technical solution described in JP6790629B2 is to set a stopper on the nail magazine, and the transmission pin in the stopper is pushed by the spring on the nail pusher, and then the transmission pin pushes the spring in the stopper, and the spring pushes the stopper block to resist the striking arm to prevent air strikes. This solution requires two springs with different elastic forces to complete the stopping, has a complex structure and high precision requirements, and is not suitable for aluminum nail magazines widely used on the market. Summary of the invention

[0006] The purpose of the present invention is to propose an anti-empty nail gun through structural improvement in view of the shortcomings of the prior art, which can smoothly and reliably transport fasteners in the nail feeding mechanism to the nailing mechanism, and prevent the "empty gun" phenomenon when the number of fasteners is insufficient.

[0007] In order to achieve the above object, the basic technical scheme of the nail gun of the present invention is as follows:

[0008] An anti-aircraft nail gun, comprising:

[0009] An energy storage mechanism,

[0010] A nail driving mechanism, including a firing pin in a nail driving base, the firing pin hitting a fastener by the energy accumulated by the energy storage mechanism; a striking mechanism is further provided at the front end of the nail driving base, the striking mechanism is slidable relative to the nail driving base, the striking mechanism is arranged at the front end of the firing pin and abuts against a workpiece;

[0011] A lifting mechanism, pushing the firing pin to move in a direction opposite to the hitting direction;

[0012] A nail magazine, for storing nails;

[0013] A nail pushing mechanism for pushing nails to the nail driving base is provided in the nail magazine, a retractable stop is provided on the nail pushing mechanism, and the striking mechanism is provided with a striking arm cooperating with the stop;

[0014] When the number of nails in the nail magazine is greater than a predetermined number, the head end of the stop is in a disengaged state from the striking arm;

[0015] When the number of nails in the nail magazine is below the predetermined number, the head end of the stop inserts into the translation track of the striking arm to prevent the striking arm from moving.

[0016] Furthermore, a chute opening towards the nail driving base is provided on one side of the base body of the nail pushing mechanism close to the nail driving base, and the tail end of the stop is located in the chute and is slidable along the chute.

[0017] Furthermore, a kidney-shaped long hole is provided in the middle of the stop, the length direction of the kidney-shaped long hole is parallel to the axis of the chute, the middle of a limit pin passes through the kidney-shaped long hole and both ends are fixed; an elastic element for applying a thrust to the stop is provided between the tail end of the stop and the base body.

[0018] Furthermore, both ends of the limit pin are fixed in the base body and the cover plate of the nail pushing mechanism.

[0019] Furthermore, the top of the elastic element abuts against the middle of the tail end of the stop, a stop tail rod extending outwards is provided on one side of the tail end of the stop, the stop tail rod extends out of the bottom wall of the chute and a tail rod bending part for limiting the extending stroke of the stop is provided at the end.

[0020] Furthermore, a bending part is provided on the base body, the horizontal side of the bending part constitutes the bottom wall of the chute for supporting the elastic element, the vertical side of the bending part is located on one side of the elastic element, and the stop tail rod is located on the other side of the elastic element.

[0021] Further, the striking arm is arranged at the tail end of the striking mechanism.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. When the nail retention amount is small but has not yet entered the state where it cannot be struck, this nail gun can still provide reliable thrust for the nails, avoiding the situation where the striker strikes empty and the nails cannot be fired when the nail retention amount is small.

[0023] 2. It can avoid damage to the workpiece surface caused by "dry firing" and protect the internal parts of the tool, creating favorable conditions for ensuring the operation quality and extending the service life of the tool.

[0024] 3. The structure is simple and easy to install, and it is generally applicable to various types of nail guns on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. The drawings are only for reference and explanation, and are not used to limit the present invention.

[0026] Among them:

[0027] Figure 1 is a schematic structural diagram of an embodiment of the anti-aircraft nail gun of the present invention;

[0028] Figure 2 is Figure 1 a partial cross-sectional view when the striker is in the ready position in the embodiment;

[0029] Figure 3 is a three-dimensional view showing Figure 1 the nail feeding mechanism and the striking mechanism in the embodiment (the stop member is disengaged from the striking arm);

[0030] Figure 4 is Figure 1 a cross-sectional view of the nail pushing mechanism in the embodiment;

[0031] Figure 5 is Figure 1 a state diagram showing the engagement of the stop member and the striking arm when the nail retention amount is insufficient in the embodiment;

[0032] Figure 6a is Figure 1 a state diagram showing the state where the upper part of the stop member and the lower part of the striking arm are just in contact when the nail retention amount is relatively small in the embodiment;

[0033] Figure 6b shows Figure 1State diagram of the upper part of the stopper contacting the lower part of the striking arm when the striking mechanism of the embodiment is depressed;

[0034] Figure 7 Yes Figure 1 Cross-sectional view of the stopper retracting after contacting the striking arm when the nail pushing mechanism of the embodiment pushes the nail;

[0035] Figure 8a Yes Figure 1 Front view of the nail pushing component of the embodiment;

[0036] Figure 8b Yes Figure 8a Cross-sectional view;

[0037] Figure 9 Yes Figure 1 Schematic diagram of the stopper structure in the nail pushing component of the embodiment;

[0038] Figure 10 For the embodiment drawings of JP6790629B2;

[0039] In the figure: 1. Energy storage mechanism; 2. Lifting mechanism, 3. Nail driving mechanism, 4. Striking mechanism, 5. Nail feeding mechanism, 6. Firing pin, 7. Nail, 8. Nail pushing mechanism, 9. Stopper, 901. Stopper tail rod, 902. Tail rod bending part, 10. Substrate, 101. Right-angle bending part, 11. Nail pushing part, 12. Force applying component, 13. Elastic element, 14. Striking arm, 15. Screw, 16. Cover plate, 17. Nail groove. Detailed implementation method

[0040] As Figures 1 to 9 shown, the anti-aircraft nail gun of this embodiment includes an energy storage mechanism 1, a lifting mechanism 2, a nail driving mechanism 3, a striking mechanism 4, a nail feeding mechanism 5, a nail pushing mechanism 8, a nail pushing part 11, a force applying component 12, and a nail magazine 17 for storing nails.

[0041] The nail driving mechanism includes a firing pin in the nail driving seat, and the firing pin strikes the fastener through the energy accumulated by the energy storage mechanism; a striking mechanism is also provided at the front end of the nail driving seat. The striking mechanism is slidable relative to the nail driving seat, and the striking mechanism is arranged at the front end of the firing pin and abuts against the workpiece. To ensure safety, only when the striking mechanism 4 abuts against the workpiece surface and is depressed, can the firing pin be fired to drive the nail.

[0042] The energy storage mechanism can be a gas spring structure as adopted in US8387718B, or a flywheel structure as shown in US9039342B2 or other energy storage structures such as a spring as shown in EP4088869B1. The energy storage mechanism in this embodiment is a gas spring structure.

[0043] The lifting mechanism pushes the firing pin in the direction opposite to the striking direction to prepare for the firing of the firing pin.

[0044] The nail magazine is provided with a nail pushing mechanism for pushing the nails to the nail driving seat. The nail pushing mechanism is provided with a retractable stop, and the tail end of the striking mechanism is provided with a striking arm that cooperates with the stop.

[0045] On one side of the base body of the nail pushing mechanism close to the nail driving seat, there is a sliding groove opening towards the nail driving seat. The tail end of the stop is located in the sliding groove and can slide along the sliding groove.

[0046] The middle part of the stop is provided with a waist-shaped long hole. The length direction of the waist-shaped long hole is parallel to the axis of the sliding groove. The middle part of the limit pin passes through the waist-shaped long hole and is fixed at both ends. Between the tail end of the stop and the base body, there is an elastic element that applies a thrust to the stop. The elastic element can be a spring. The two ends of the limit pin are fixed in the base body and the cover plate of the nail pushing mechanism.

[0047] The top of the elastic element abuts against the middle part of the tail end of the stop. On one side of the tail end of the stop, there is a tail rod of the stop extending outwards. The tail rod of the stop extends out of the bottom wall of the sliding groove and the end is provided with a bent part of the tail rod.

[0048] As Figure 8b shown, the base body is provided with a right-angle bent part. The horizontal side of the right-angle bent part constitutes the bottom wall of the sliding groove for supporting the elastic element. The vertical side of the right-angle bent part is located on one side of the elastic element, forming a semi-surrounding structure for the elastic element. The tail rod of the stop is located on the other side of the elastic element. The elastic element will not be skewed during the compression or elongation process between the tail rod of the stop and the right-angle bent part.

[0049] When the striking mechanism 4 is pressed down, the switch is turned on, and the lifting mechanism 2 is started. The striker 6 in the nail driving mechanism 3 compresses the air in the energy storage mechanism 1 from the temporarily locked preparation position. After the striker 6 disengages from the engagement with the lifting mechanism 2, it is suddenly released to strike the nails 7 conveyed by the nail feeding mechanism 5, causing them to shoot out from the nozzle.

[0050] In this embodiment, the striker 6 can move between the first position driven by the lifting mechanism 2 and the second position where it strikes the nails after being released. Among them, after the striker 6 finishes striking the nails 7, it will be driven by the lifting mechanism 2 to stop at the preparation position. At the preparation position, the nails 7 in the nail feeding mechanism 5 contact the lower part of the striker 6 under the action of the nail pushing mechanism 8, as Figure 2 shown.

[0051] When the striking mechanism 4 presses down and the switch is turned on, the striker 6 moves towards the first position. After the lower part of the striker 6 disengages from the nails 7, the nails 7 are pushed into the nail driving channel under the action of the nail pushing mechanism 7. Subsequently, during the process of the striker 6 moving towards the first position, the head strikes the nails to complete the nail driving action.

[0052] The nail pushing mechanism 8 provides a thrust to push the nail 7 into the nailing channel. The thrust comes from the force applying component 12, which applies a force to the nail pushing mechanism to move in the direction of the nailing channel and acts on the nail through the nail pushing portion 11. The nail pushing mechanism 8 has a stopper 9, which is in an extended state under the action of the elastic element 13; when the stopper 9 is not forced, the elastic element 13 is in an extended state, such as Figure 4 shown.

[0053] like Figure 3 As shown, when the number of nails is large enough, the stopper 9 in the nail pushing mechanism 8 and the striking arm 14 in the striking mechanism 4 are in a disengaged state, that is, there is a distance between the upper end of the stopper 9 and the lower end of the striking arm 14, and the stopper 9 and the striking arm 14 do not interfere with each other. At this time, the striking mechanism 4 can be pressed down normally, and the firing pin 6 can hit the nail 7 normally.

[0054] like Figure 5 As shown, when the amount of nails left is insufficient, the stopper 9 in the nail pushing mechanism 8 extends upwardly to a greater extent, and the upper end is inserted into the translation channel of the striking arm 14, that is, the stopper 9 will interfere with the striking arm 14, preventing the striking mechanism 4 from being pressed down, and nailing cannot be performed.

[0055] In the above two states, normal striking and unable to strike, the operation of the nail gun is relatively safe; when it is in the critical state between the above two states, there are safety hazards:

[0056] like Figure 6a , Figure 6b As shown, when the amount of nails left is small and the upper part of the stopper 9 is in a just-contacting state with the lower part of the striking arm 14, that is, similar to a tangential contact state, the striking mechanism 4 can still be pressed down normally. Since the stopper 9 is in contact with the striking arm 14, the head end of the stopper 9 is supported by the striking arm 14, resulting in the travel of the nail pushing mechanism 8 to the nail driving channel being blocked. The nail pushing mechanism 8 cannot provide effective thrust for the nail to reliably enter the nail driving channel. At this time, if the firing pin 6 is fired, the nail may not be driven out, which will cause damage to the tool. This is a defect of similar products.

[0057] In this embodiment, the stopper 9 can slide in the base 10 under the action of the elastic element 13. When the upper portion of the stopper 9 is in a just-contacting state with the lower portion of the striking arm 14, the stopper 9 compresses the elastic element 13 under the thrust of the force-applying component 12 to put it in a compressed state. Figure 7 As shown, different from Figure 4 At this time, the thrust of the force-applying component 12 can be effectively transmitted to the nail, that is, the top nail can be reliably pushed into the nailing channel to avoid empty firing of the firing pin.

[0058] After the nail is driven out, it has passed this critical state and entered a state where the nail quantity is insufficient and the nail cannot be driven.

[0059] When the number of nails remaining is small but has not yet entered the state where it cannot be struck, this nail driver can still provide reliable thrust to the nails, avoiding the situation where the striker strikes empty and the nails cannot be fired when the number of nails remaining is small.

[0060] As shown in Figures 8 and 9, in this embodiment, the stop member 9 is slidably limited in the chute of the base body 10, and the elastic element 13 is installed between the stop member 9 and the base body 10, biasing the tail end of the stop member 9 to protrude upward, and the elastic element 13 is in an extended state; a kidney-shaped long hole is opened in the middle of the stop member 9, and the screw 15 serves as a limit pin and passes through the kidney-shaped long hole to be locked with the cover plate 16, so that the stop member 9 translates between the base body 10 and the cover plate 16 along the set track, that is, along the length direction of the kidney-shaped long hole.

[0061] Among them, the nail pushing part 11 is rotatably hinged in the base body 10, and the force applying member 12 is installed in the base body 10, and the other end is fixed to the nail groove 17, providing thrust for the nail pushing mechanism 8 and acting on the nails through the base body 10.

[0062] As Figure 9 shown, the tail rod bending part 902 plays a role in limiting the stroke of the stop member 9 to extend. When the tail rod bending part 902 abuts against the bottom of the horizontal side of the right-angle bending part 101, the extension of the stop member 9 reaches the limit position, and at this time, the elongation of the elastic element 13 reaches the maximum.

[0063] Practice shows that this embodiment can ensure that the nail gun that prevents air strikes is not fired when there are too few fasteners in the nail magazine, thereby protecting the internal components of the tool and the surface of the workpiece. At the same time, it can avoid the phenomenon of "empty gun" when the number of fasteners reaches the preset number, thereby effectively extending the service life of the tool.

[0064] In addition to the above embodiments, the present invention may also have other implementation manners. For example: the number of protection blocks can be one or more; the elastic parts can be elastic sheets, springs, etc.; the trigger end can be integrated with the nail pushing mechanism or an independent part connected to the nail pushing mechanism; the trigger end can first push the elastic element and then push the protection block, or can also push the elastic element and then push the protection block through a transmission member. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. An anti-air strike nail gun, comprising: Energy storage mechanism, The nailing mechanism comprises a striker in the nailing seat, wherein the striker strikes the fastener by the energy stored in the energy storage mechanism; a striking mechanism is also provided at the front end of the nailing seat, wherein the striking mechanism is slidable relative to the nailing seat, and the striking mechanism is arranged at the front end of the striker for abutting against the workpiece; The lifting mechanism pushes the firing pin in the direction opposite to the striking direction; A nail box for storing nails; The invention is characterized in that: a nail pushing mechanism for pushing nails to the nail driving seat is provided in the nail box, a retractable stopper is provided on the nail pushing mechanism, and a striking arm cooperating with the stopper is provided on the striking mechanism; When the number of nails in the nail magazine is greater than a predetermined number, the head end of the stopper is in a disengaged state from the striking arm; When the number of nails in the nail magazine is less than a predetermined number, the head end of the stopper is inserted into the translation track of the strike arm to prevent the strike arm from moving.

2. The anti-runaway nail gun according to claim 1, characterized in that: A slide groove facing the opening of the nail driving seat is provided on one side of the base of the nail pushing mechanism close to the nail driving seat, and the tail end of the stopper is located in the slide groove and can slide along the slide groove.

3. The anti-runaway nail gun according to claim 2, characterized in that: A waist-shaped long hole is provided in the middle of the stopper, and the length direction of the waist-shaped long hole is parallel to the axis of the slide slot. The middle part of the limit pin passes through the waist-shaped long hole and both ends are fixed; an elastic element is provided between the tail end of the stopper and the base to apply thrust to the stopper.

4. The anti-runaway nail gun according to claim 3, characterized in that: The two ends of the limit pin are fixed in the base body and the cover plate of the pin pushing mechanism.

5. The anti-runaway nail gun according to claim 3, characterized in that: The top of the elastic element abuts against the middle of the stopper tail end, and one side of the stopper tail end is provided with a stopper tail rod extending outward, the stopper tail rod extends out of the bottom wall of the slide slot and the end is provided with a tail rod bending portion that limits the extension stroke of the stopper.

6. The anti-runaway nail gun according to claim 5, characterized in that: The base is provided with a bending portion, the horizontal side of the bending portion constitutes a bottom wall of a slide groove supported by an elastic element, the vertical side of the bending portion is located on one side of the elastic element, and the stopper tail rod is located on the other side of the elastic element.

7. The anti-runaway nail gun according to claim 1, characterized in that: The striking arm is arranged at the rear end of the striking mechanism.

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