Nailing gun and safety device for nailing gun

Abstract

The utility model discloses a nailer and nailer's safety device, including bumper, transmission assembly, positioning rod and sensor, transmission assembly includes connecting rod and connecting plate, the positioning rod is equipped with the guide hole of passing through for connecting rod, one end of connecting rod with sensor corresponds to set up, and the outer thread is equipped with in the outer peripheral wall of the other end of connecting rod, one end of connecting plate is equipped with the screw hole of cooperation with outer thread, and the other end of connecting plate is fixedly connected with the bumper. Through the cooperation of the outer thread on connecting rod and the screw hole on connecting plate, the user or maintenance personnel can adjust the relative position between connecting rod and connecting plate steplessly by rotating connecting rod, thereby accurately adjusting the effective length of the whole transmission assembly. This design can directly and conveniently compensate the stroke loss caused by the long-term use and wear of the bumper, connecting piece and other components.

Description

Technical Field

[0001] This utility model relates to the field of nailing equipment technology, specifically to a nail gun and a safety device for the nail gun. Background Technology

[0002] As a highly efficient power tool, the safety of electric nail guns is paramount. Therefore, modern electric nail guns are generally equipped with a contact safety device. This device works by using a retractable safety lever to detect whether the nozzle is pressed firmly against the workpiece surface. Sensors detect the position of this safety lever, and the electronic control system then determines whether to allow the tool to fire. This safety interlock mechanism effectively prevents accidental triggering and ensures user safety.

[0003] However, in actual long-term use, the safety lever of the safety device will inevitably experience mechanical wear. This wear leads to an increase in the clearance between various components. Specifically, even if the safety lever has been fully pressed back to the preset physical stroke end point by the workpiece, its actual travel distance is shortened due to the accumulated clearance in the intermediate links, making it unable to effectively drive the end of the transmission component to trigger the sensor. The sensor therefore cannot send the correct safety signal to the controller, causing the nail gun to be misjudged as being in an unsafe state and refuse to work, even if the nozzle is pressed tightly against the workpiece. This malfunction seriously affects the normal use of the tool and operational efficiency. Therefore, maintenance personnel often need to replace worn parts to restore the original stroke, which is not only cumbersome but also increases maintenance costs. Utility Model Content

[0004] To address the technical problem of existing nail guns lacking a simple and effective compensation mechanism, this utility model proposes a nail gun and a safety device for the nail gun. By rotating the connecting rod, the relative position of the connecting rod and the connecting plate can be adjusted, thereby changing the overall length of the transmission component to compensate for the travel loss caused by the wear of the safety rod after long-term use.

[0005] The technical solution adopted by this utility model is as follows: a safety device for a nail gun includes a safety rod, a transmission assembly, a positioning rod, and a sensor. The transmission assembly includes a connecting rod and a connecting plate. The positioning rod is provided with a guide hole for the connecting rod to pass through. One end of the connecting rod is correspondingly set with the sensor. The outer peripheral wall of the other end of the connecting rod is provided with an external thread. One end of the connecting plate is provided with a screw hole that mates with the external thread. The other end of the connecting plate is fixedly connected to the safety rod.

[0006] Optionally, a spring is fitted on the outer peripheral wall of the portion of the connecting rod located between the connecting plate and the positioning rod.

[0007] Optionally, the connecting rod is fixedly connected to a rotating wheel.

[0008] Optionally, the outer peripheral wall of the wheel is provided with anti-slip texture.

[0009] Optionally, the number of positioning rods is two, and the rotating wheel is located between the two positioning rods.

[0010] Optionally, the connecting plate and the bumper are fixedly connected by screws or integrally formed.

[0011] This utility model also discloses a nail gun, including a gun frame, a nozzle mounted on the gun frame, a nail magazine mounted below the nozzle, and the safety device described above. One end of the positioning rod is mounted on the gun frame, and the other end of the positioning rod is provided with the guide hole. The end of the safety rod away from the connecting plate is movably located in front of the nozzle.

[0012] Optionally, the nail box is provided with a top plate, the top plate is connected to a limiting plate, one end of the limiting plate is detachably connected to the top plate, the other end of the limiting plate protrudes from the top plate, and the safety rod is provided with a protrusion that moves against the limiting plate.

[0013] The beneficial effects of this invention are as follows: By engaging the external thread on the connecting rod with the threaded hole on the connecting plate, users or maintenance personnel can steplessly adjust the relative position between the connecting rod and the connecting plate by rotating the connecting rod, thereby precisely adjusting the effective length of the entire transmission assembly. This design directly and conveniently compensates for travel loss caused by long-term wear of components such as the bumper and connecting parts, ensuring that the transmission assembly effectively triggers the sensor when the bumper is fully retracted, restoring the normal firing function of the nail gun. This transforms maintenance from traditional component replacement to in-situ adjustment, greatly simplifying the maintenance process, saving repair time and parts costs, and improving the economic efficiency of using the nail gun. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the safety device for a nail gun according to an embodiment of the present invention;

[0015] Figure 2 This is an exploded view of the safety device for a nail gun according to an embodiment of the present invention;

[0016] Figure 3 This is a schematic diagram showing the safety bar of the nail gun abutting against the limiting plate according to an embodiment of the present invention.

[0017] The markings in the attached figures are as follows: 1. Gun mount; 2. Nail magazine; 21. Top plate; 22. Limiting plate; 3. Safety rod; 31. Protrusion; 4. Connecting rod; 41. External thread; 5. Connecting plate; 51. Screw hole; 6. Positioning rod; 7. Sensor; 8. Spring; 9. Rotary wheel; 10. Nozzle; 101. Through hole. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-3 As shown, this embodiment discloses a nail gun and a safety device for the nail gun. The nail gun includes a gun frame, a nozzle mounted on the gun frame, a nail magazine mounted below the nozzle, and a safety device. The safety device includes a safety rod, a transmission assembly, a sensor, and at least one positioning rod. One end of the positioning rod is mounted on the gun frame, and the other end of the positioning rod has a guide hole. The end of the safety rod away from the connecting plate is movably located in front of the nozzle. The safety rod is movably positioned in front of the nozzle to detect whether the nozzle is in contact with the workpiece surface. The transmission assembly transmits the linear motion of the safety rod to the sensor. The transmission assembly includes a connecting rod and a connecting plate. The sensor is used to detect whether the safety rod has been pressed back to a safe position and is connected to the controller signal in the electronic control system of the electric nail gun. The positioning rod is fixed to the gun frame body and has a guide hole for the connecting rod to pass through, serving a guiding and supporting function. One end of the connecting rod has an external thread, and the other end is correspondingly positioned with the sensor. The connecting plate can be made of wear-resistant, self-lubricating material, with a centrally machined threaded hole that mates with the external thread of the connecting rod. By rotating the connecting rod, the relative position of the connecting rod and the connecting plate can be adjusted, thereby changing the overall length of the transmission assembly. This compensates for travel loss caused by wear on the safety rod after long-term use. This design ensures that the sensor can accurately detect the position of the safety rod, improving the reliability and service life of the tool. The connecting plate and the safety rod can be fixed together with screws or integrally molded. This connection method is simple and robust, ensuring transmission stability. Thread-locking adhesive can be applied to the external thread of the connecting rod to prevent loosening of the threads due to vibration during use, ensuring the stability of the transmission assembly length.

[0020] The safety lever is made of a metal rod with a contact head at the front end for contact with the workpiece surface. When the nozzle presses against the workpiece, the safety lever is pressed back into the gun frame. A protrusion on the safety lever interacts with a limiting plate inside the nail magazine to achieve anti-dry-firing functionality.

[0021] A spring is fitted between the connecting rod, the positioning rod, and the connecting plate. The spring is a stainless steel compression spring, and its preload is precisely calculated to ensure timely reset of the safety bar without causing excessive resistance to the operator. The stainless steel material provides excellent corrosion resistance and durability.

[0022] A rotating wheel is fixedly mounted on the connecting rod, and the connecting rod and the rotating wheel can be connected via a spline. The rotating wheel can be made of engineering plastic or rubber, and its outer circumference has anti-slip texture, providing good grip even when it is oily. The rotating wheel is located between the two positioning rods, forming a stable support structure to prevent the connecting rod from shifting during movement. Users can adjust the length of the transmission component by manually rotating the rotating wheel, without the need for special tools, greatly improving ease of use. There are two positioning rods, both fixed to the gun mount body. Each positioning rod has a guide hole through which the connecting rod passes, ensuring that the connecting rod maintains linear movement during operation and preventing jamming.

[0023] The sensor, which can be a microswitch or a Hall effect sensor, is fixedly mounted inside the gun mount. The sensor is connected to the controller of the electronic control system. The controller is programmed to allow the drive assembly to respond to the switch firing command only when the sensor detects that the safety lever is in the fully retracted safe position. This safety interlock mechanism effectively prevents accidental operation and improves tool safety.

[0024] The nail magazine contains a top plate with a spring underneath for continuously pushing the nail pack upwards. A limit plate connects to the top plate; one end of the limit plate is detachably connected to the top plate via screws or a snap-fit ​​mechanism for easy maintenance or replacement. The other end of the limit plate bends upwards and protrudes from the top plate. A protrusion on the safety lever abuts against the limit plate. When the nail magazine is full, the top plate and limit plate are in the lower position of the magazine, with no interference between the limit plate and the protrusion, allowing the safety lever to be normally pressed back. When the nails are almost used up, the top plate rises to its highest predetermined position under the spring's push, and the protruding part of the limit plate moves into the path of the protrusion, preventing the safety lever from being fully pressed back. The nozzle has a through hole for the limit plate to pass through. At this point, the sensor cannot detect a safety signal, the controller locks the motor to prevent dry firing, protects the firing pin and drive assembly, and reminds the user to reload the nail pack in time.

[0025] During use, the operator aligns the nozzle with the workpiece surface and applies pressure. The safety lever is pressed back into the gun holder. The movement of the safety lever is transmitted through the transmission assembly. The connecting plate pushes the connecting rod to move linearly along the guide hole of the positioning rod. When the end of the connecting rod triggers the sensor, the sensor sends a safety signal to the controller. At this time, the switch is pulled, and the controller starts the motor after confirming receipt of the safety signal, completing the nail-driving action. If the nails in the nail magazine are almost empty, the limit plate will block the protrusion of the safety lever, preventing the safety lever from being pressed back, thus preventing dry firing. The spring ensures that the safety lever automatically returns to the extended position after the pressure is released. After long-term use, if the transmission stroke is lost due to wear, the user can adjust the length of the transmission assembly by rotating the wheel to restore accurate detection.

[0026] It is understood that the specific embodiments described above are merely for explaining the relevant utility model and not for limiting the utility model. It should also be noted that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings. Multiple technical solutions in the same embodiment, as well as multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions that do not contradict or conflict with each other. All equivalent structural transformations made based on the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly included within the protection scope of this utility model.

Claims

1. A safety device for a nail gun, characterized in that, The device includes a bumper, a transmission assembly, a positioning rod, and a sensor. The transmission assembly includes a connecting rod and a connecting plate. The positioning rod has a guide hole for the connecting rod to pass through. One end of the connecting rod is correspondingly positioned to the sensor, and the outer peripheral wall of the other end of the connecting rod has an external thread. One end of the connecting plate has a threaded hole that mates with the external thread, and the other end of the connecting plate is fixedly connected to the bumper.

2. The safety device for the nail gun according to claim 1, characterized in that, A spring is fitted on the outer peripheral wall of the portion of the connecting rod located between the connecting plate and the positioning rod.

3. The safety device for the nail gun according to claim 1, characterized in that, The connecting rod is fixedly connected to a rotating wheel.

4. The safety device for a nail gun according to claim 3, characterized in that, The outer peripheral wall of the wheel is provided with anti-slip texture.

5. The safety device for the nail gun according to claim 3, characterized in that, There are two positioning rods, and the rotating wheel is located between the two positioning rods.

6. The safety device for a nail gun according to claim 1, characterized in that, The connecting plate and the bumper are fixedly connected by screws or integrally formed.

7. A nail gun, characterized in that, The device includes a gun mount, a muzzle mounted on the gun mount, a nail magazine mounted below the muzzle, and a safety device as described in any one of claims 1 to 6. One end of the positioning rod is mounted on the gun mount, and the other end of the positioning rod is provided with the guide hole. The end of the safety rod away from the connecting plate is movably located in front of the muzzle.

8. The nail gun according to claim 7, characterized in that, The nail box is provided with a top plate, and the top plate is connected to a limiting plate. One end of the limiting plate is detachably connected to the top plate, and the other end of the limiting plate protrudes from the top plate. The safety rod is provided with a protrusion that moves against the limiting plate.

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