Nail gun

Abstract

The invention discloses a nail gun. The nail gun comprises a shell; the motor is arranged in the shell; the percussion assembly is arranged in a nailing period, can move from an initial position to a percussion position so as to knock out a nail to a workpiece, and can move from the percussion position to the initial position; the guide assembly is arranged to at least guide the percussion assembly to conduct nailing in the nailing direction; the trigger switch is arranged on the shell and is configured to be operated when the trigger assembly is intended to be driven; the push rod switch can be opened when the push rod switch presses and abuts against the workpiece in the nailing direction; the controller at least can control the motor to operate so as to enable the percussion assembly to conduct nailing; the controller is configured to control the nailing distance interval of the percussion assembly in the state that the trigger switch is continuously operated and the push rod switch is kept abutting against the workpiece.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to a nail gun. Background Art

[0002] As a nailing tool, nail guns can be used in many occasions such as home decoration and construction sites. Especially when using nail guns to complete home decoration and other tasks, users pay more attention to the aesthetics of nailing. For example, the consistency of nailing depth or the consistency of the spacing between nails affects the aesthetics of nailing.

[0003] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a nail gun that can at least ensure that the nailing intervals are basically the same.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions: A nail gun comprises: a shell; a motor, which is arranged in the shell; a firing assembly, which is arranged to move from an initial position to a firing position within a nailing cycle to drive a nail into a workpiece, and move from the firing position to the initial position; a guide assembly, which is arranged to at least guide the firing assembly to nail in a nailing direction; a trigger switch, which is arranged in the shell and is configured to be operated when the firing assembly is intended to be driven; a push rod switch, which is configured to be turned on when pressed against the workpiece in the nailing direction; a controller, which can at least control the operation of the motor to enable the firing assembly to nail; the controller is configured to control the distance interval of the nailing of the firing assembly when the trigger switch is continuously operated and the push rod switch remains against the workpiece.

[0006] In one embodiment, the nail gun also includes a detection device, which is configured to at least detect the distance that the push rod switch remains against the workpiece and moves on the workpiece; the controller is configured to control the firing assembly to nail when the moving distance is basically equal to the distance interval.

[0007] In one embodiment, the detection device includes a first rolling element disposed on the clip assembly and a first detection element for detecting the number of rolling turns of the first rolling element.

[0008] In one embodiment, the first rolling element is disposed on the housing.

[0009] In one embodiment, a trigger element is disposed on the first rolling element, and a sensing element is disposed on the housing or the clip assembly, and the sensing element can sense the trigger element when the first rolling element rolls along the workpiece.

[0010] In one embodiment, the sensing element comprises a Hall sensor, and the triggering element comprises a magnet.

[0011] In one embodiment, the detection device includes a second rolling element linked to the push rod switch, and a second detection element for detecting the number of rotations or the rotation state of the second rolling element.

[0012] In one embodiment, the second rolling element is configured as an eccentric wheel; the eccentric wheel can open the push rod switch during rolling.

[0013] In one embodiment, the detection device further includes an acceleration sensor disposed on the housing.

[0014] In one embodiment, the detection device further includes a displacement sensor arranged on the housing.

[0015] In one embodiment, the nail gun further comprises an interactive device, and the interactive device is configured to be operable by a user to set a plurality of nailing gears, and different nailing gears correspond to different distance intervals.

[0016] In one embodiment, the interaction device includes at least one of a button, a code wheel, and an operation screen.

[0017] The benefit of the present application is that the aesthetics of the nailing effect is ensured by controlling the nailing interval. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a stereoscopic image of a nail gun from one perspective; Figure 2 yes Figure 1 A cross-sectional view of a nail gun in FIG. Figure 3 yes Figure 1 A schematic diagram of the internal structure of the nail gun in the initial position; Figure 4 yes Figure 1 A schematic diagram of the internal structure of the nail gun in the firing position; Figure 5 yes Figure 1 A three-dimensional schematic diagram of a driving wheel of a nail gun; Figure 6 It is a stereoscopic image of the nail gun from another perspective; Figure 7 is a circuit schematic diagram of a nail gun in one embodiment; Figure 8 is a flow chart of a control method of a nail gun in one embodiment; Fig. 9 is a flow chart of a control method of a nail gun in one embodiment; Fig.10 is a schematic diagram of the movement position of the firing pin in the nail gun and the number of rotations of the motor in one embodiment; Fig.11 is a flow chart of a control method of a nail gun in one embodiment; Fig.12 is a flow chart of a control method of a nail gun in one embodiment; Fig.13 is a schematic diagram of the relationship between nail gun temperature and minimum nailing time interval in one embodiment; Fig.14 is a schematic diagram of the relationship between nail gun temperature and minimum nailing time interval in one embodiment; Fig.15 is a flow chart of a control method of a nail gun in one embodiment; Fig.16 is a schematic diagram of a state of a backflow prevention structure in one implementation mode; Fig.17 is a schematic diagram of another state of the anti-return structure in one implementation method; Fig.18 is a control circuit diagram of a light emitting device in an embodiment; Fig.19 is a schematic diagram showing a light emitting device in an embodiment; Fig. 20 is a circuit schematic diagram of a nail gun in one embodiment; Fig.21 is a circuit schematic diagram of a nail gun in one embodiment; Fig. 22 is a flow chart of a control method of a nail gun in one embodiment; Fig.23 is a circuit schematic diagram of a nail gun in one embodiment; Fig.24 is a schematic structural diagram of a nail gun according to an embodiment; Fig.25 is a schematic diagram of a push rod switch according to an embodiment; Fig.26is a schematic diagram of the change in motor speed during a nailing cycle in one implementation mode; Fig. 27 is a circuit schematic diagram of a nail gun in one embodiment; Fig.28 is a schematic diagram of the change in motor speed during two consecutive nailing cycles in one embodiment; Fig.29 The present invention is a structural diagram of a nail gun in one embodiment; Fig.30 yes Fig.29 The whole structure diagram of the nail gun after removing part of the shell; Fig.31 yes Fig.29 A structural diagram of some components of a nail gun; Fig.32 yes Fig.29 A structural diagram of some components of a nail gun; Fig.33 yes Fig.29 A structural diagram of some components of a nail gun; Fig.34 yes Fig.29 The control circuit diagram of the nail gun in. DETAILED DESCRIPTION

[0020] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0021] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0022] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0023] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0024] In this application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, etc. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0025] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0027] In this application, the terms "controller", "processor", "central processing unit", "CPU", and "MCU" are interchangeable. When a unit "controller", "processor", "central processing unit", "CPU", or "MCU" is used to perform a specific function, unless otherwise specified, these functions can be performed by a single unit or multiple units.

[0028] In the present application, the terms “device”, “module” or “unit” may be implemented in the form of hardware or software to achieve specific functions.

[0029] In this application, the terms "calculate", "judge", "control", "determine", "identify", etc. refer to the operations and processes of a computer system or similar electronic computing device (e.g., a controller, a processor, etc.). The definitions of up and down, left and right, or front and back in this application can be found in Figures 1 to 4 The orientation shown.

[0030] Figure 1 to Figure 2 The nail gun 100 shown includes: a housing 11, a power output unit 12, a cylinder 13 and a clip assembly 14. Among them, the housing 11 includes a first accommodating space 111 extending in the direction of the first straight line 101 and a second accommodating space 112 extending in the direction of the second straight line 102. In one embodiment, the power output unit 12 can be partially arranged in the first accommodating space 111, or partially arranged in the second accommodating space 112. In one embodiment, the power output unit 12 can include a motor 121, or can include an energy storage device. The so-called energy storage device can be understood as releasing the stored kinetic energy in the first half of a nailing cycle to achieve nailing, and storing energy in the second half of a nailing cycle to prepare for subsequent nailing. The energy storage device can be a cylinder that can pre-store gas or a cylinder that can be inflated and deflated during the working process, or it can also be an elastic member such as a spring. In this embodiment, the cylinder 13 is used as the energy storage device, and the cylinder 13 is arranged in the second accommodating space 112.

[0031] The housing 11 is also formed with a handle 113 for the user to hold. A power interface 1131 is provided at one end of the handle 113 for connecting to a DC power source or an AC power source. In this embodiment, the power interface 1131 is configured to connect to a battery pack 15. A main switch 113a is provided on the handle 113, and the user controls the start and stop of the nail gun 100 through the main switch 113a.

[0032] The other end of the handle 113 is connected to the cylinder 13, and the cylinder 13 extends along the second straight line 102, and the first straight line 101 and the second straight line 102 are perpendicular to each other. The clip assembly 14 is arranged in the direction of the third straight line 103 parallel to the first straight line 101. As an optional embodiment, the clip assembly 14 is also provided with a window 141 for the user to observe the remaining nails. The window 141 is set as one or more notches on the clip assembly 14, which can allow the user to check the remaining nails on the one hand, and on the other hand, it can also allow the user to perform simple maintenance on the clip assembly 14 without disassembling the clip assembly 14.

[0033] A firing assembly 16 is disposed in the cylinder 13, and the gas in the cylinder 13 does work, pushing the firing assembly 16 to move and drive out the nail. The nail gun 100 also includes a striking part 17. The striking part 17 is at least partially disposed in the cylinder 13, for example, it can be a piston disposed in the cylinder 13 and connected to the firing assembly 16. The striking part 17 can be connected to the firing assembly 16, and can strike the firing assembly 16, so that it moves in the cylinder 13. In one embodiment, the cylinder 13 also includes an inflation nozzle, which is used to pre-fill gas in the cylinder 13. The pre-filled gas has a large kinetic energy stored in a compressed state, and can push the striking part 17 to quickly strike the firing assembly 16 to drive out the nail. Alternatively, the cylinder 13 is a cylinder including an air inlet nozzle and an air outlet nozzle, which does not require pre-filling of gas and can be inflated during the operation of the nail gun 100.

[0034] Here, the cylinder 13 that can be pre-filled with gas is used as an example for explanation. After the nail gun 100 is shut down, the motor 121 stops outputting power and can stop the firing assembly 16 at the initial position. The pre-filled gas in the cylinder 13 is in a compressed state. When the nail gun 100 is powered on and the motor is started, the motor 121 outputs power, the firing assembly 16 is released, and the striking part 17 can convert the kinetic energy in the cylinder 13 into a striking force to strike the firing assembly 16, so that the firing assembly 16 instantly obtains a large acceleration and moves to Figure 4 After the nail is driven, the firing assembly 16 is driven from the motor 121. Figure 4 The firing position shown returns to Figure 3 The firing assembly 16 can continuously drive the striking part 17 to compress the gas in the cylinder 13 during this process. The process from the nail gun starting to nailing, the firing assembly 16 returning to the initial position or the vicinity of the initial position, i.e., the stop position, is called a nailing cycle. It should be noted that Figure 3The initial position shown is the position where the firing assembly 16 stops after the nail gun 100 stops, and therefore can also be referred to as the stop position. The position to which the firing assembly 16 can move upwards as far as possible can be referred to as the top stop point, and the position to which the firing assembly 16 can move downwards as far as possible can be referred to as the bottom stop point, wherein the firing position and the bottom stop point can be the same position, and the initial position is close to the top stop point from bottom to top but is not the top stop point, that is, the distance between the initial position and the top stop point is greater than zero.

[0035] like Figure 2 The motor 121 extends substantially along the first straight line 101, and the cylinder 13 and the firing assembly 16 disposed in the cylinder 13 extend substantially along the second straight line 102. The motor 121 and the cylinder 13 are disposed substantially vertically. The motor 121 can be used as a power source to drive the motor 121 to drive the firing assembly 16 to move in the cylinder 13. In an optional implementation, the motor 121 can be used as a part of the motor 121. Power can be output to the drive shaft 124, and the drive wheel 125 is disposed on the drive shaft 124. The firing assembly 16 includes at least a striker 161. In one embodiment, the firing assembly 16 may also include a striking portion 17, wherein the striking portion 17 may be a piston connected to the top of the striker 161. The piston and the striker 161 are fixedly connected or detachably connected. The striking portion 17 can compress the pre-charged gas in the cylinder 13 when the striker 161 is driven to move upward, i.e., to move to the initial position. The firing pin 161 is formed with a transmission tooth 161a, and the firing pin 161 can move in the cylinder 13 along the second straight line 102 direction, and the second straight line 102 can be understood as the nailing direction. The driving wheel 125 can cooperate with the transmission tooth 161a to drive the firing assembly 16 to overcome the air pressure in the cylinder 13 to do work, so that the firing assembly 16 can enter the Figure 3 Initial position shown.

[0036] like Figure 4 and Figure 5 As shown, the driving wheel 125 is a gear structure. The driving wheel 125 is also formed with a second connecting hole 125a for connecting the driving shaft 124. The second connecting hole 125a is specifically a flat hole. When the driving shaft 124 is connected to the second connecting hole 125a, the driving wheel 125 can rotate synchronously with the driving shaft 124. A plurality of driving teeth 125g are formed around the main body of the driving wheel 125. The driving teeth 125g include a first tooth 125b arranged at the starting end and a second tooth 125d arranged at the end. Here, it is defined that the driving wheel 125 starts to drive the firing assembly 16 to reset to Figure 3The driving tooth 125g that first starts to contact the firing pin 161 in the firing assembly 16 in the initial position is defined as the first tooth 125b, and the driving tooth 125g that is in the initial position and last meshed with the firing pin 161 in the firing assembly 16 is defined as the second tooth 125d. The first tooth 125b and the second tooth 125d include a first section 125e and a second section 125f. The first section 125e is evenly distributed with a plurality of driving teeth 125g; the second section 125f is smooth and continuous, and is not distributed with driving teeth 125g. When the driving tooth 125g of the first section 125e is engaged with the transmission tooth 161a on the firing pin 161, the driving wheel 125 can drive the firing pin 161 to compress the gas in the cylinder 13 to do work; when the second section 125f cooperates with the firing pin 161, since the second section 125f is smooth and continuous, the firing pin 161 will be quickly pushed out by the gas in the cylinder 13 in the absence of the driving tooth 125g to stop it, thereby achieving the nailing effect.

[0037] In other embodiments, the driving wheel 125 may also be a driving component in other forms, and the present application does not specifically limit other possible structural forms of the driving wheel 125 .

[0038] In this embodiment, the nail gun 100 is provided with a light emitting device 18. The light emitting device 18 may be one or more LED lamp beads arranged at different positions, or a row of light strips, or a digital tube, or a display screen, etc. Figure 6 As shown, the light emitting device 18 is three LED lights arranged on the housing 11. Among them, one light emitting device 181 is arranged just above the horizontal plane where the striker 161 is located, and the other two light emitting devices 182 can cooperate with the light emitting device 181 to project a V-shaped, arrow-shaped or triangular light spot on the nailed workpiece 300, and the light spot can indicate the nailing position on the workpiece 300. In one implementation, the other two light emitting devices 182 are arranged on the housing 11 on the left and right sides of the front end of the nail gun 100.

[0039] It is known that after the nail gun has been used for a long time, the cylinder 13 may leak due to problems such as material or sealing. If the cylinder 13 leaks, the pre-filled gas in the cylinder 13 will be reduced, or the cylinder 13 will be under-filled during operation. In short, the kinetic energy of the gas after being compressed will be reduced, thereby affecting the nailing force or depth of the nail gun. When the motor 121 drives the firing assembly 16 back to the initial position, i.e., the stop position, under the same power, it may also not stop when reaching the initial position due to the reduction of gas in the cylinder 13, which poses certain safety hazards. For nail guns whose energy storage devices are elastic parts such as springs, they will also face the problem of spring elastic force decay after being used for a long time, resulting in a reduction in the kinetic energy, i.e., elastic energy, of the spring after compression, which will also affect the nailing force or depth, or bring certain safety hazards.

[0040] In order to solve the above problems, it is necessary to accurately detect whether the cylinder is leaking or whether the spring force is attenuated, and to promptly alarm and repair after confirming that the cylinder is leaking or the spring force is attenuated.

[0041] refer to Figure 7 The control circuit 200 of the nail gun shown may include at least a parameter detection unit 21, a drive circuit 22, a controller 23, a light-emitting device 18, and a motor 121. The battery pack 15, as the power supply of the control circuit 200, can not only provide driving power for the motor 121, but also provide low-voltage power supply power for the controller 23 after conversion by the power conversion unit, or provide power for the parameter detection unit 21, or provide power for the light-emitting device 18. This embodiment only illustrates the power supply path for the battery pack 15 to provide power for the motor 121, and other possible power supply paths are not described in detail.

[0042] In one embodiment, the drive circuit 22 is connected between the controller 23 and the motor 121, and can receive the control signal output by the controller 23, and control the operation state of the motor 121 by changing its own conduction state, such as stopping or rotating or rotating speed or rotating direction. Optionally, the drive circuit 22 can be composed of one or more power components. In one embodiment, Figure 7As shown, the drive circuit 22 includes a plurality of power elements VT1, VT2, VT3, VT4, VT5, and VT6. Each gate terminal of the power element is electrically connected to the controller 23 for receiving a control signal from the controller 23. Each drain or source of the power element is connected to the stator winding of the motor 121. The power elements VT1-VT6 receive control signals from the controller 23 to change their respective conduction states, thereby changing the current loaded by the battery pack on the stator winding of the motor 121. In one embodiment, the drive circuit 22 may be a three-phase bridge driver circuit including six controllable semiconductor power devices (e.g., FET, BJT, IGBT, etc.). It will be understood that the above-mentioned power elements may also be any other type of solid-state switch, such as an insulated gate bipolar transistor (IGBT), a bipolar junction transistor (BJT), etc.

[0043] In order to rotate the motor 121, the drive circuit 22 has multiple drive states. In one drive state, the stator winding of the motor generates a magnetic field. The controller 23 outputs a corresponding PWM control signal to the switch element in the drive circuit according to the rotor position or back electromotive force of the motor to switch the drive circuit to switch the drive state, so that the stator winding generates a changing magnetic field to drive the rotor to rotate, thereby realizing the rotation or phase change of the motor. It should be noted that any other circuit and control method that can drive the rotation or phase change of the motor can be used in the present disclosure, and the present disclosure does not limit the circuit structure of the drive circuit 22 and the control of the drive circuit 22 by the controller 23.

[0044] The parameter detection unit 21 can at least detect the working parameters of the motor 121, or detect the electrical parameters of the battery pack 15. In one embodiment, the parameter detection unit 21 can detect the output current, output voltage, or output power of the motor 121, or the working time of the motor 121 in a nailing cycle, i.e., the time of the nailing cycle, or the nailing frequency, or the number of revolutions of the motor in a nailing cycle, etc. In one embodiment, the parameter detection unit 21 can also detect the battery parameters of the battery pack 15, such as detecting the output voltage, current, power consumption, or power consumption of the battery pack in a nailing cycle. It is understandable that the parameter detection unit 21 may include one or more detection devices, which can detect a variety of different working parameters or battery parameters separately or simultaneously.

[0045] In this embodiment, if there is no air leakage in the cylinder 13, or the spring force has not decayed, the output energy of the motor 121 in each nailing cycle is basically the same, or the energy consumption of the battery pack 15 in each nailing cycle is also basically the same. If there is an air leakage problem in the cylinder 13, or the spring force decays, the energy required for the motor 121 to drive the firing assembly 16 to drive the power unit 17 to gradually compress the gas or spring in any nailing cycle will be reduced, and the energy consumption of the battery pack 15 will also be reduced. In other words, by analyzing the output energy of the motor 121 and / or the energy consumption of the battery pack 15 in at least one nailing cycle, the accumulation or integration of the motor energy or the battery pack energy in a time period can be formed, which can avoid the problem of low credibility of the comparison of energy or current or voltage or power at discrete moments, so as to more accurately judge whether the cylinder 13 is leaking or the spring force is decaying.

[0046] In this embodiment, the controller 23 can at least obtain the working parameters of the motor 121 and / or the electrical parameters of the battery pack 15, and then determine the output energy of the motor 121 in at least one nailing cycle or the energy loss of the battery pack 15 in at least one nailing cycle according to the obtained parameters. Exemplarily, the controller 23 can calculate the output energy of the motor in one nailing cycle according to the product of the output current, output voltage and time of one cycle of the motor 121 in one nailing cycle.

[0047] It should be noted that the air pressure in the cylinder 13 changes with the movement of the firing assembly 16 in the cylinder 13 during a nailing cycle, and the average air pressure in the cylinder 13 during a nailing cycle can be considered to be basically unchanged. If the cylinder 13 leaks, the air pressure in the cylinder will decrease, that is, the air pressure at any time or the average air pressure in a nailing cycle will decrease, then the output energy of the motor 121 in a nailing cycle will decrease, or the energy consumption of the battery pack 15 in a nailing cycle will decrease. In other words, the output energy of the motor 121 in a nailing cycle, or the energy consumption of the battery pack 15 in a nailing cycle is positively correlated with the air pressure in the cylinder 15, or at least positively correlated with the average air pressure of the cylinder 13 in a nailing cycle. In one embodiment, the above positive correlation can be linear or nonlinear. According to this relationship, the controller 23 can determine the air pressure of the cylinder 13 according to the output energy of the motor 121 and / or the energy loss of the battery pack 15 in at least one nailing cycle currently calculated, or at least determine the size of the air pressure of the cylinder 13 in one nailing cycle. Similarly, when the energy storage device is a spring, the output energy of the motor 121 in one nailing cycle, or the energy loss of the battery pack 15 in one nailing cycle is positively correlated with the elastic force of the spring, or at least positively correlated with the average air pressure of the spring in one nailing cycle. In one embodiment, the above positive correlation can be linear or nonlinear. According to this relationship, the controller 23 can determine the elastic force of the spring according to the output energy of the motor 121 and / or the energy loss of the battery pack 15 in at least one nailing cycle currently calculated, or at least determine the size of the elastic force of the spring in one nailing cycle. In this embodiment, the air pressure of the cylinder 13 or the elastic force of the spring can be understood as the kinetic energy of the energy storage device or at least corresponds to the kinetic energy of the energy storage device.

[0048] Assuming that the cylinder 13 is not leaking, the output energy of the motor 121 in one nailing cycle is W11, or the energy loss of the battery pack 15 in one nailing cycle is W21, and the average air pressure of the cylinder 13 is Pa1. After the cylinder 13 leaks, the output energy of the motor 121 in one nailing cycle is W12, or the energy loss of the battery pack 15 in one nailing cycle is W22, and the average air pressure of the cylinder 13 is Pa2, then W12 is less than W11, W22 is less than W21, and Pa2 is less than Pa1.

[0049] In one embodiment, the controller 23 can set the average air pressure Pa1 of a nailing cycle when the cylinder 13 is not leaking as the air pressure threshold. When it is determined that the air pressure in the cylinder 13 is less than the air pressure threshold according to the output energy of the motor 121 in a nailing cycle and / or the energy consumption of the battery pack 15 in a nailing cycle, it can be determined that there is a problem of air leakage in the cylinder 13, so that the controller 23 can control the motor 121 to stop working, for example, the motor 121 can be controlled to cut off the power or stop outputting the control signal.

[0050] In one embodiment, the controller 23 can also control the light-emitting device 18 to display different prompt information after determining the relationship between the air pressure in the cylinder 13 and the air pressure threshold. For example, when the air pressure is lower than the low pressure threshold, the cylinder 13 may have a leakage problem, and the controller 23 can control the light-emitting device 18 to output prompt information in a first manner, wherein the first manner may include at least one of the number of light-emitting devices, light-emitting color, light-emitting frequency, brightness level, and light-emitting display content. When the air pressure is substantially equal to the air pressure threshold, the controller 23 can control the light-emitting device 18 not to emit light or to emit light in a second manner different from the first manner. When the air pressure is greater than the air pressure threshold, the controller 23 can control the light-emitting device 18 to emit light in a second manner different from the first manner and the second manner.

[0051] Similarly, the determination or early warning method of the spring elastic force can also refer to the determination or early warning method of the air pressure in the cylinder 13, which will not be repeated here.

[0052] refer to Figure 8 A control process of the nail gun shown may include at least the following steps: S101, obtaining working parameters of a motor in at least one nailing cycle.

[0053] S102, determining the air pressure in the cylinder according to the working parameters in at least one nailing cycle.

[0054] S103, when the air pressure is lower than the air pressure threshold, the motor is controlled to stop working.

[0055] refer to Fig. 9 A control process of the nail gun shown may include at least the following steps: S201, obtaining operating parameters of a motor and / or electrical parameters of a battery pack in at least one nailing cycle.

[0056] S202: Determine the air pressure in the cylinder according to the working parameters and / or electrical parameters in at least one nailing cycle.

[0057] S203, determining the relationship between the air pressure in the cylinder and the air pressure threshold.

[0058] S204: When the air pressure in the cylinder is less than the air pressure threshold, control the light emitting device to output prompt information in a first manner.

[0059] S205, when the air pressure in the cylinder is substantially equal to the air pressure threshold, control the light emitting device to output prompt information in a second manner.

[0060] S206: When the air pressure in the cylinder is greater than the air pressure threshold, control the light emitting device to output prompt information in a third manner.

[0061] It is known that after a nailing cycle of the nail gun is completed, the firing pin 161 stops at the stop position. Generally, the controller 23 can determine whether the motor 121 needs to stop according to the working time after the motor 121 is powered on. For example, if a nailing cycle is T, the controller 23 can control the motor to stop after the motor 121 rotates for T1 time. However, if the motor speed is too fast, when the motor stops at the preset stop time, the firing pin 161 may have reached the stop position, but the motor has not completely stopped rotating, so that the firing pin 161 will be driven to continue to move to the initial position or even double hit.

[0062] Since the correspondence between the number of revolutions of the motor 121 and the position of the striker 161 is not affected by the motor speed or other factors, the present application can control the stop position of the striker 161 according to the number of revolutions of the motor 121 in order to accurately control the stop position of the striker 161. Figure 7 In the control circuit shown, the parameter detection unit 21 can also detect the number of rotations of the motor 121. For example, the parameter detection unit 21 can count from zero after the motor is started, and calculate the number of rotations of the motor according to the number of motor commutation. The controller 23 can determine the timing of controlling the motor to run at a constant speed according to the number of rotations of the motor, ensuring that the motor runs at a constant speed before stopping, thereby ensuring the accuracy of the stop position control.

[0063] refer to Fig.10 , taking any physical point of the striker 161 as a reference point, the relationship between the position of the striker 161 and the number of revolutions of the motor in a nailing cycle is illustrated. Fig.10 The number 0 represents the number of revolutions of the motor when the motor is just powered on and the striker 161 is in the initial position or the stop position, N1 represents the number of revolutions of the motor 121 when the motor 121 drives the striker 161 to move from the initial position to the firing position, and N2 represents the number of revolutions of the motor 121 when the motor 121 returns to the stop position after being powered on and driving the striker 161 to nail. N3 represents the number of revolutions of the motor 121 when the stop signal is triggered during the process of the striker 161 returning from the firing position to the initial position. It is understandable that a Hall sensor can be provided on the driving wheel 125 to detect the position of the striker 161, and a stop signal will be triggered when the striker 161 moves to a preset position. The controller 23 can control the motor 121 to stop rotating in response to the stop signal.

[0064] In this embodiment, the controller 23 can control the motor 121 to run at a constant speed when the number of revolutions of the motor 121 is greater than or equal to the first revolution threshold and less than the second revolution threshold. The first revolution threshold can be Fig.10 The number of revolutions N1 in the second revolution threshold may be Fig.10That is to say, the controller 23 can control the motor 121 to run at a constant speed before the stop signal is detected, so as to ensure that the rotation speed of the motor is stable when braking. The stable or constant initial braking speed can ensure that the number of rotations of the motor 121 from the start of braking to the stop of rotation is stable, so as to ensure that the striker 161 can be stably stopped at the stop position.

[0065] In other embodiments, the controller 23 can also control the motor 121 to run at a constant speed in other ways before detecting the stop signal until the stop signal is detected, so as to have a stable initial braking speed and ensure that the striker 161 can stably stop at the stop position.

[0066] In one embodiment, the controller 23 can control the speed of the motor 121 at a constant speed according to the energy stored in the energy storage device. Generally, the greater the energy stored in the energy storage device, the higher the speed of the motor at a constant speed, and vice versa. In other words, the energy currently stored in the energy storage device has a positive correlation with the speed of the motor at a constant speed.

[0067] In this embodiment, the energy storage device is set as the cylinder 13. When the number of revolutions of the motor 121 is greater than or equal to the first number of revolutions threshold and less than the second number of revolutions threshold, the controller 23 can obtain the air pressure in the cylinder 13, and set the speed of the motor to run at a constant speed according to the air pressure, or the controller 23 can calculate the kinetic energy in the cylinder 13 according to the air pressure in the cylinder 13, and set the speed of the motor to run at a constant speed according to the kinetic energy. In one implementation, the kinetic energy in the cylinder 13 can be the kinetic energy at the current moment, or it can be the average kinetic energy of the cylinder 13 in a nailing cycle. In one implementation, the controller 23 can calculate the air pressure in the cylinder 13 by using the output energy of the motor 121 in at least one nailing cycle and / or the energy consumption of the battery pack 15 in at least one nailing cycle to determine the air pressure in the cylinder 13 as described in the above embodiment, which will not be repeated here.

[0068] refer to Fig.11 A control process of the nail gun shown may include at least the following steps: S301, obtaining the number of rotations of the motor.

[0069] S302, when the number of rotations is greater than or equal to a first threshold number of rotations and less than a second threshold number of rotations, controlling the motor to run at a constant speed.

[0070] S303, when a brake signal is detected, braking is performed with a constant rotation speed as an initial braking speed.

[0071] Some power tools require a faster starting acceleration when starting, such as nail guns, reciprocating saws, jigsaws, etc. Quick-start power tools need to increase the duty cycle of the start signal to the target value, such as to the maximum, in a short period of time. However, the quick start of power tools will face a large starting current. If the tool is blocked or started with a large load during startup, it may burn out. Especially for power tools such as nail guns that need to be started and stopped frequently, the ability to start safely and quickly is an important performance indicator to ensure the normal operation of the nail gun.

[0072] In order to avoid the above problems, this embodiment takes a nail gun as an example to provide a control method for starting an electric tool.

[0073] Continue to refer Figure 7 In the control circuit of the nail gun shown, the parameter detection unit 21 can detect the working parameters of the motor 121, at least the working parameters during the starting process of the motor 121. For example, the parameter detection unit 21 can detect one or more of the rotation speed, number of revolutions, starting current or starting voltage of the motor 121. The controller 23 can set the maximum duty cycle of the control signal for controlling the start of the motor 121 according to the obtained working parameters of the motor 121. In this embodiment, by adjusting the maximum duty cycle of the motor start control signal according to the working parameters of the motor, it is possible to avoid damage to the tool when the electric tool is forced to start due to stalling or heavy load during the starting process.

[0074] During the start-up process of the motor 121, when the controller 23 detects that the working parameter of the motor 121 is less than or equal to the parameter threshold, it can be considered that the motor 121 may be started with a large load, or a stall may have occurred during the start-up process, so that the maximum duty cycle of the start control signal can be set to be less than or equal to the duty cycle threshold. It is understandable that the setting of the parameter threshold of the motor working parameter may be different in different types of power tools. Exemplarily, the parameter threshold may be the minimum speed or the minimum number of rotations when the motor 121 is stalled and started, or it may be the minimum speed or the minimum number of rotations when the motor is started with a large load.

[0075] In one embodiment, the controller 23 can set the duty cycle threshold value according to the battery parameters of the battery pack 15. For example, the duty cycle threshold value can be set according to at least one of the battery power, voltage, temperature, battery cell, and number of parallel battery cells of the battery pack. In this embodiment, the duty cycle threshold value is inversely correlated with at least one battery parameter. For example, the lower the voltage of the battery pack 15, the greater the duty cycle threshold value. Exemplarily, the nail gun 100 is generally powered by a 24V battery pack. If the controller 23 detects that the voltage of the battery pack 15 is lower than 24V, the duty cycle threshold value of the start control signal is set to 100%, so that when the working parameters of the motor 121 are less than or equal to the parameter threshold value, the duty cycle of the start control signal can be increased to 100% at most. If the controller 23 detects that the voltage of the battery pack 15 is higher than 24V, the duty cycle threshold value of the start control signal is set to be lower than 100%, for example, set to 60%, so that when the working parameters of the motor 121 are less than or equal to the parameter threshold value, the duty cycle of the start control signal can be increased to 60% at most. This ensures that when the power tool is installed with battery packs of different voltages or capacities, the starting performance of the power tool remains basically the same, and also increases the machine's anti-blocking capability.

[0076] refer to Fig.12 A control process of the nail gun shown may include at least the following steps: S401, monitoring the working parameters of the motor during the motor startup process.

[0077] S402: If the operating parameter of the motor is less than or equal to the parameter threshold, the maximum duty cycle of the start control signal is limited to be less than or equal to the duty cycle threshold.

[0078] S403, obtaining battery parameters of the battery pack.

[0079] S404, setting a duty cycle threshold according to battery parameters.

[0080] The order of some or all of the process steps in the flowchart in this application is not limited to the steps defined in the flowchart, because the order of the steps can be parallel or interchanged. For example, steps S403 and S404 can be parallel or interchanged with step S401.

[0081] The nail gun 100 usually works in an environment that requires continuous and sustained nailing. After working for a long time, the temperature of the cylinder 13 or the motor 121 and other components may rise or be too high. For example, the temperature of the motor 121 may reach 150°C. If the nail gun 100 continues to nail at a high temperature, some parts inside the nail gun may be burned, such as the circuit board, or the motor may be short-circuited. Therefore, the present application provides a nail gun that can detect temperature and control the start frequency or start time interval of the nail gun.

[0082] Continue to refer Figure 7In the control circuit of the nail gun 100 shown, the parameter detection unit 21 may include a temperature detection unit capable of detecting temperature data, and can detect the temperature at at least one position in the nail gun 100. In this embodiment, the temperature detection unit may be one or more temperature sensors, such as a thermistor sensor, a thermocouple sensor, a temperature sensor, a platinum thermal resistance temperature sensor, and a digital output sensor.

[0083] In one embodiment, the temperature detection unit can detect the temperature of the motor 121, for example, it can detect the temperature of the motor stator or rotor, or the temperature detection unit can detect the temperature of the circuit board where the control circuit is located or the temperature of the power element on the circuit board, or it can detect the temperature inside the cylinder 13 or the temperature of the cylinder wall or the temperature of the striking part 17, or it can detect the temperature of the firing pin 161, or it can detect the temperature of the piston, or it can detect the temperature of the air outlet provided on the housing 11 of the nail gun 100, where the air outlet can be a heat dissipation port provided near the motor 121, or a heat dissipation port provided near the circuit board, etc. In other embodiments, the temperature detection unit can also detect the temperature of any other position of the nail gun 100, which will not be listed here one by one. The temperature described in this embodiment can be understood as the temperature of at least one position or component of the nail gun 100.

[0084] In this embodiment, the controller 23 can obtain the temperature detected by the temperature detection unit, and adjust the minimum nailing time interval of the nail gun 100 according to the relationship between the temperature and the set temperature threshold. It should be noted that the time interval between the end of a nailing cycle and the beginning of the next nailing cycle of the nail gun 100 can be called the nailing time interval, and the minimum nailing time interval can be understood as the minimum time interval between two adjacent nailing cycles. In this embodiment, the start time of a nailing cycle can be the time when the controller 23 detects the start signal, and the end time of a nailing cycle can be the time when the controller 23 detects the stop signal. Thus, a nailing time interval can be the time period from when the controller 23 detects the stop signal in the previous nailing cycle to when the controller 23 detects the start signal at the beginning of the next nailing cycle.

[0085] Since the nailing frequency can be understood as the number of nailing times per unit time, the nailing time interval and the nailing frequency can be replaced in some embodiments. For example, the controller 23 can adjust the nailing frequency of the nail gun 100 according to the temperature of the nail gun 100.

[0086] In one embodiment, the controller 23 can set the minimum nailing time interval to T1 when the temperature of at least one place of the nail gun 100 is less than or equal to the temperature threshold, and set the minimum nailing time interval to T2 when the temperature is greater than the time threshold, and T2 is greater than T1. Or it can be said that the controller 23 can set the maximum nailing frequency to f1 when the temperature of at least one place of the nail gun 100 is less than or equal to the temperature threshold, and set the maximum nailing frequency to f2 when the temperature is greater than the time threshold, and f2 is less than f1. It can be understood that after the temperature of the nail gun 100 exceeds the predetermined value, the minimum nailing time interval of the nail gun 100 becomes larger, or the nailing frequency of the nail gun is reduced. Exemplarily, when the temperature of the nail gun is less than or equal to 100°C, the minimum nailing time interval is 1s, which can be understood as when the temperature of the nail gun 100 is less than or equal to 100°C, the nailing time interval between any two adjacent nailing cycles is greater than or equal to 1s. When the temperature of the nail gun is greater than 100° C., the minimum nailing time interval is 2 seconds. It can be understood that when the temperature of the nail gun 100 is greater than 100° C., the nailing time interval between any two adjacent nailing cycles is greater than or equal to 2 seconds.

[0087] In one embodiment, the temperature of the nail gun 100 has a positive correlation with the minimum nailing time interval. For example, as the temperature of the nail gun continues to increase, the minimum nailing time interval set by the controller 23 increases. Fig.13 The temperature of the nail gun shown has a linear relationship with the minimum nailing time interval, wherein the horizontal axis represents the nail gun temperature t, and the vertical axis represents the minimum nailing time interval TI. In the temperature range where the nail gun temperature is less than the temperature threshold t0, the minimum nailing time interval TI of the nail gun can be a fixed value, and when the nail gun temperature is greater than or equal to the temperature threshold, the higher the temperature t, the larger the minimum nailing time interval TI, which is basically a linear relationship. In one embodiment, as Fig.14 The nail gun temperature and the minimum nailing time interval have a step-type change relationship, that is, the minimum nailing time interval corresponding to any temperature within a certain temperature range is the same. In other embodiments, the nail gun temperature and the minimum nailing time interval may also have other change relationships. It is understandable that the nail gun temperature may be inversely correlated with the maximum nailing frequency, that is, as the nail gun temperature continues to increase, the maximum nailing frequency set by the controller 23 becomes smaller.

[0088] In one embodiment, if the controller 23 detects a start signal and determines that the time from the start signal to the last stop signal received is less than the minimum nailing time interval, the start signal can be ignored, that is, the motor 121 is not controlled to start, or the motor 121 is controlled not to start or the motor 121 is not powered on or the drive signal is not output to drive the motor 121, etc. If the controller 23 detects a start signal and determines that the time from the start signal to the last stop signal received is greater than or equal to the minimum nailing time interval, the motor 121 is controlled to start.

[0089] In this embodiment, when the temperature of the nail gun exceeds a certain value, by extending the minimum nailing time interval or reducing the nailing frequency, the nail gun can be given a certain amount of time to dissipate heat or cool down, so that it does not continue to work in a high temperature state for a short period of time, thereby improving the safety of the nail gun's operation and ensuring the working performance of the nail gun.

[0090] refer to Fig.15 A control process of the nail gun shown may include at least the following steps: S501, obtaining the temperature of the nail gun.

[0091] S502: When the temperature of the nail gun is less than or equal to the temperature threshold, the minimum nailing time interval of the nail gun is set to T1.

[0092] S503, when the nail gun temperature is greater than the temperature threshold, setting the minimum nailing time interval to T2.

[0093] In one embodiment, in order to prevent the firing pin 161 from sliding down during the process of the firing pin 161 moving from the firing position to the initial position or after the nail gun 100 is stopped, a Fig.16 and Fig.17 The non-return structure 19 shown stops or locks the striker.

[0094] Continue to refer Fig.16 and Fig.17 The anti-return structure 19 may include a solenoid 191, an elastic member 192, a push rod 193 and a stopper 192. The solenoid 191 can at least be electrically connected to the controller 23, and the controller 23 can control the solenoid 191 to be powered on or off. Fig.16 As shown, when the solenoid 191 is not powered, the elastic member 192 is in an extended state, and the stopper 192 connected to the push rod 193 is meshed with the check tooth 162 on the other side of the striker 161, so that the striker 161 can be kept in the initial position without slipping. When the nail gun is turned on and the motor 121 is powered on, the solenoid 191 is powered on, and the electromagnetic effect generated attracts the push rod 193 to be compressed along the first direction 1, so that the stopper 192 can rotate in a clockwise direction, thereby disengaging from the meshing state with the check tooth 162, and the striker 161 can be driven by the power in the cylinder 13 without being blocked.

[0095] That is to say, when the solenoid 191 is energized, the stopper 192 is in an invalid state, that is, the stopper 192 cannot lock the firing pin 161 or is not in contact with the firing pin 161, and the firing pin 161 can move from the initial position to the firing position to nail under the drive of the driving force 125; and when the solenoid 191 is de-energized, the stopper 192 is in a stop state, that is, the stopper 192 can lock the firing pin 161 in the initial position, or at least prevent the firing pin 161 from slipping during the process of moving from the firing position to the initial position.

[0096] If the solenoid 191 cannot be effectively started in time to put the stopper 192 in a stopping state when the firing pin 161 moves to the initial position after nailing, the firing pin 161 may accidentally slip off, and continuous nailing or other safety accidents may occur.

[0097] To solve the above problems, continue to refer to Figure 7 The control circuit diagram of the nail gun shown in the figure, wherein the parameter detection unit 21 can detect the number of rotations of the motor 121. When the motor 121 is started, the controller 23 controls the solenoid 191 to be powered on, the stopper 192 works in a failure state, and the firing pin 161 can move from the initial position to the firing position. After the motor 121 is powered on, the controller 23 can continuously monitor the number of rotations of the motor 121, and when the number of rotations is greater than or equal to the number of rotations threshold, the solenoid 191 is controlled to be powered off, so that the stopper 192 works in a stop state, which can prevent the firing pin 161 from slipping during the process of returning to the initial position upward, and can lock the firing pin 161 in the initial position. In other words, after the nail gun 100 is shut down, the solenoid 191 remains in a powered-off state. Even if the nail gun 100 does not work for a long time, the non-return structure 19 will not make the solenoid 191 in a powered-on state because of locking the firing pin 161, thereby preventing the solenoid from working for a long time at a high temperature. The revolution threshold in this embodiment may be the revolution of the motor 121 when the firing pin 161 reaches the firing position after the motor 121 is started. Since the displacement of the firing pin 161 is certain when the motor 121 rotates a certain number of revolutions, the solenoid is de-energized by controlling the number of revolutions of the motor, which ensures that the firing pin can be locked by the solenoid while preventing the solenoid from being energized for a long time and heating up.

[0098] It is understandable that, in the process of the striker 161 moving downward from the initial position to the firing position, the striker 161 quickly completes the nailing work by relying on the power stored in the energy storage device, i.e., the cylinder 13. In the above process, the driving force 125 is not engaged with the striker 161, and the motor 121 drives the driving wheel 125 to rotate. After nailing, the driving wheel 125 is engaged with the striker 161 in the process of the striker 161 moving upward from the striking position, and the striker 161 moves upward under the drive of the driving wheel 125. The motor 121 changes from not driving the striker 161 to driving the striker 161 to move, and the working state of the motor 121 changes, and the working parameters of the motor 121 also change greatly. For example, when the striker 161 starts to move upward from the firing position, the change range of the working current, output torque, or speed of the motor 121 is large, the output current of the motor becomes larger, or the output torque of the motor becomes larger, or the speed of the motor decreases.

[0099] In this embodiment, the controller 23 can also monitor at least one of the output current, output torque or rotation speed of the motor to determine whether the firing pin 161 begins to move upward from the firing position. Exemplarily, when the controller 23 monitors the output current of the motor, or the rate of change of the output current is greater than a set threshold, the solenoid 191 can be controlled to be powered off, so that the stopper 192 works in a stop state. Alternatively, when the controller 23 detects that the output torque of the motor or the rate of change of the torque is greater than a set threshold, the solenoid 191 can be controlled to be powered off, so that the stopper 192 works in a stop state. Alternatively, when the controller 23 detects that the rotation speed or acceleration of the motor is greater than a set threshold, the solenoid 191 can be controlled to be powered off, so that the stopper 192 works in a stop state.

[0100] refer to Fig.18 The control circuit of the light emitting device shown in the figure, some units or devices therein are connected with Figure 7 The label is also used in Figure 7 The parameter detection unit 21 may include a sensor capable of detecting the total number of nails in the clip assembly 14 or the number of remaining nails, or may include a sensor capable of detecting the depth of driven nails, or may include a sensor capable of detecting the force of nailing, etc. This embodiment does not specifically limit the types, installation locations, or working modes of various sensors.

[0101] The controller 23 can obtain the information transmitted by the parameter detection unit 21, and then control the light emitting device 18 to display the first information of the nails in the clip assembly 14 and / or the second information of the nails that have been driven. In one embodiment, the first information may include the specific number of remaining nails in the clip assembly 14, or the number range of remaining nails, or an alarm message when the remaining nails are less than a preset number. The second information may include the nailing depth information of the driven nails, or the nailing force information, or the nailing angle information, or the nailing interval information, etc.

[0102] In this embodiment, Figure 1 and Figure 6 The light emitting device 18 shown includes LED digital tubes 181 and 182, or at least one light strip composed of multiple LEDs, and may also include Figure 6 The display screen 183 shown. The digital tube can display the first information and / or the second information in one or more ways such as light intensity, flash frequency, flash number, light color, light quantity, etc. The display screen 183 can directly display content data, such as Fig.19 The light emitting device 18 shown can display the pattern and number of nails, or display the real image or depth of the nails driven, or display the nailing animation. Not limited to digital tubes or display screens, as long as the light emitting device can display the above information, it is within the protection scope of this application.

[0103] In one embodiment, the controller 23 can also display the fault information of the nail gun 100 or the current working mode or battery pack information. Among them, the fault information may include various common faults, such as over-temperature, over-voltage, under-voltage, over-current, stalling, anti-lock, etc. The working mode may include a single-shot mode and a single-drive mode, and the continuous-shot mode is a continuous-drive mode. The battery information may include the remaining power or remaining power time of the battery pack, or the output voltage, or the output current, or the temperature, etc. In this embodiment, the light-emitting device 18 can also display the above-mentioned fault information or working mode or battery pack information in at least one of the following ways: light intensity, flash frequency, number of flashes, light color, light quantity, and display content data.

[0104] In one embodiment, the light emitting device 18 may display different fault codes to indicate different fault information, for example, E1 represents over-temperature of the power tube in the control circuit, E2 represents motor stall, E3 represents battery under-voltage, etc. By displaying faults with different fault codes, different fault types of the nail gun will not be affected by the number of light emitting devices 18, light color, or light frequency, etc., which is a more intelligent and simpler fault display.

[0105] In one embodiment, the display screen 183 as a light emitting device may also include an operation interface, such as a touch interface or an interface that can be combined with a physical button. The operation interface can receive the user's operation information, and can transmit it to the controller 23 while displaying the operation information. The controller 23 can control the motor 121 to work according to the user's operation. Exemplarily, the user can select the nailing mode, switch the nailing mode, or set the operating parameters of the nail gun in the operation interface, such as setting the nailing force or nailing depth or nailing time interval or nailing frequency.

[0106] In one embodiment, the light-emitting device 18 can be divided into a lighting device and a fault prompting device. In some embodiments, the lighting device and the fault prompting device can be the same device or different devices. If the lighting device and the fault prompting device are the same lighting device, when there is no fault in the nail gun 100, the lighting device 18 remains in a constant light state; when there is a fault in the nail gun 100, the fault can be prompted by flashing frequency or color or flashing times or fault code, or the fault can be prompted by extinguishing the lighting device. If the lighting device and the fault prompting device are different lighting devices, when there is no fault in the nail gun 100, the lighting device can remain in a constant light state, and the fault prompting device can remain in a long off state; when a fault occurs, the lighting device can remain in a constant light state or be extinguished, and the fault prompting device can prompt the fault in the above-mentioned fault prompting method. If the lighting device and the fault prompting device are different lighting devices, when there is no fault in the nail gun 100, the lighting device and the fault prompting device can remain in a constant light state, and when there is a fault, the lighting device can remain in a constant light state or be extinguished, and the fault prompting device can be extinguished to prompt the fault or prompt the fault in the above-mentioned fault prompting method. In one embodiment, the fault indication device may indicate the fault level by light color and / or flashing frequency when or after indicating the fault type. For example, the green light is always on when there is no fault, the yellow light is on or flashing when there is a minor fault (such as undervoltage protection, overtemperature protection), and the red light is on or flashing when there is a serious fault (such as overcurrent protection, stall protection, anti-lock protection).

[0107] In one embodiment, the parameter detection unit 21 may be a brightness sensor or other sensor capable of detecting the light intensity of the working environment of the nail gun. The controller 23 may control whether the light emitting device 18 is on or the light intensity of the controller according to the detected light intensity. For example, when working outdoors during the day in good weather, the light emitting device 18 may be controlled to be turned off, or at least the lighting device may be controlled to be turned off. When working indoors in a dim light, the brightness of the light emitting device may be enhanced, or at least the brightness of the lighting device may be increased.

[0108] refer to Fig. 20 The control circuit of the nail gun shown in the figure is Figure 7The control circuit has the same structure or parts as the Fig. 20 The circuit numbers in Figure 7 The control circuit at least includes a first control circuit 24 that can control the operation of the light-emitting device 18, and a second control circuit 25 that controls the motor 121. Among them, the first control circuit 24 can at least independently control the light-emitting device 18 to light up when the motor 121 is not powered on, that is, when the motor 121 is not started, the light-emitting device 18 is controlled to light up in advance. Lighting up the light-emitting device 18 before nailing can illuminate the workpiece 300 or the working environment in advance, so that the user can get a better use experience, and the lighting device 18 can work even if the motor 121 fails to start.

[0109] In one embodiment, the first control circuit 24 and the second control circuit 25 can be arranged on the same circuit board. In one embodiment, the first control circuit 24 and the second control circuit 25 can also be arranged on different circuit boards.

[0110] refer to Fig.21 In the nail gun control circuit shown in the figure, the first control circuit 24 at least includes a light control switch 241 and a light circuit 242, wherein the light control switch 241 can conduct the current path between the light circuit 242 and the battery pack 15 after being operated by the user, so that the light device 18 can be lit. In this embodiment, the light control switch 241 can be a button switch, a toggle switch, a membrane switch, a lever switch, a micro switch, a travel switch, etc. The second control circuit 25 and Figure 7 The control circuit in is basically the same as that in the embodiment, which is a circuit for controlling the operation or shutdown of the motor 121, and can also be called the main control circuit of the nail gun 100. In this embodiment, the second control circuit 25 may include a host switch 251, a drive circuit 22, and a controller 23. After the host switch 251 is operated by the user, the current path between the controller 23, the drive circuit 22 and the motor 121 can be turned on, and the motor 121 can be controlled to operate after the controller 23 outputs a control signal. For the implementation of the controller 23 controlling the operation of the motor 121, please refer to Figure 7 The description of the control circuit shown is not repeated here. It should be noted that the host switch 251 can also be a button switch, or a toggle switch, or a membrane switch, or a lever switch, or a micro switch, or a travel switch, etc.

[0111] In other embodiments, it can be considered that the light control switch 241 does not belong to the first control circuit 24, but is connected to the first control circuit 24. Or it can be considered that the host switch 251 does not belong to the second control circuit 25, but is connected to the second control circuit 25. In other words, other ways can be used to divide the control circuit, as long as the corresponding functions can be achieved.

[0112] In one embodiment, the nail gun 100 may include a travel switch (not shown), which acts as the above-mentioned light control switch 241 in the first switch stroke and acts as the main switch 251 in the second switch stroke. In one embodiment, when the travel switch is in the second switch stroke, the controller 23 in the second control circuit 25 is turned on, but the motor 121 is not started. When the travel switch is operated to the third switch stroke, the motor 121 is started. In one embodiment, when the travel switch is operated to the fourth switch stroke, the controller 23 can perform specific control operations on the motor 121, for example, it can control the motor 121 to run at a constant speed.

[0113] In one embodiment, the light emitting device 18 can be turned off by operating the light emitting control switch 241. The light emitting circuit 242 can also be powered off by the controller 23 in the second control circuit 25, thereby turning off the light emitting device 18. In one embodiment, the controller 23 can also control the light emitting circuit 242 to delay disconnection, so that the light emitting device 18 is delayed to turn off. It can be understood that different components can be used to implement the function of the light emitting circuit 242, and the specific circuit structure of the circuit is not limited in this application.

[0114] Continue to refer Fig.21, the controller 23 can also control the light-emitting circuit 242 to change the circuit state according to the working parameters of the motor 121 detected by the parameter detection unit 21 and / or the battery parameters of the battery pack 15, so that the light-emitting device 18 can change the light-emitting form to give an alarm prompt. Among them, the working parameters of the motor 121 can be the output current of the motor 121, or the output voltage, or the output power, or the working time of the motor 121 in a nailing cycle, that is, the time of the nailing cycle, or the nailing frequency, or the number of revolutions of the motor in a nailing cycle, or the temperature, etc. The battery parameter can be the output voltage, or the current, or the power loss, or the power loss, or the temperature, etc. of the battery pack 15 in a nailing cycle. Exemplarily, when the controller 23 determines that the motor is blocked according to the current of the motor 121, the motor 121 can be controlled to stop rotating, and the light-emitting circuit 242 can be controlled to change the circuit state, so that the light-emitting device 18 flashes and / or emits red light to give an alarm prompt. In this embodiment, the controller 23 can control the light-emitting device 18 to give an alarm prompt in at least one form of the number of light-emitting devices, light-emitting color, light-emitting frequency, number of flashes, brightness level, and light-emitting display content. The controller 23 may also set an alarm according to the fault type or fault level.

[0115] Continue to refer Figure 1 and Figure 2 The nail gun 100 shown includes a push rod switch 113b in addition to the trigger switch 113a. The trigger switch 113a is used to control the start and stop of the nail gun 100, and the push rod switch 113b can be used as a safety switch, which is arranged at the lower end of the firing assembly 16, and when the user pushes the nail gun 100 downward along the nailing direction, i.e., the second straight line 102, the push rod switch 113b can be pressed against the workpiece 300, so that the push rod switch 113b is turned on, i.e., the push rod switch 113b is triggered. In this embodiment, the nail gun 100 is also provided with a guide assembly 114, which can be a part of the housing 11, or can be arranged on the housing 11 and can partially or completely cover the firing assembly 16, and can at least guide the firing assembly 16 to nail in the nailing direction. It can be understood that the lower end of the guide assembly 114 can be an outlet for nails. There is a height difference between the lower end of the push rod switch 113 b and the lower end of the guide assembly 114 . When the push rod switch 113 b just contacts the workpiece 300 , there is still a height difference between the lower end of the guide assembly 114 and the workpiece 300 .

[0116] Generally, the nail gun 100 can include at least two working modes: a single drive mode and a continuous drive mode. In the drive mode, one nail can be driven at a time, and in the continuous drive mode, nails can be driven continuously for multiple times. In one embodiment, the triggering modes of the trigger switch 113a and the push rod switch 113b are different, and the corresponding working modes of the nail gun 100 are also different. Exemplarily, when the push rod switch 113b abuts against the workpiece 300, the trigger switch 113a is operated to turn on the single drive mode of the nail gun 100 and drive a nail. When the trigger switch 113a is operated and the push rod switch 113b abuts against the workpiece 300, the continuous drive mode of the nail gun 100 can be turned on. In the continuous drive mode, the trigger switch 113a is continuously operated, and the user only needs to intermittently abut the push rod switch 113b against the workpiece 300 to continuously drive nails, that is, when the trigger switch 113a is constantly triggered by the user, a nail is driven once each time the push rod switch 113b abuts against the workpiece 300. That is to say, continuous nailing does not mean nailing all the time, but means that when the trigger switch 113a is continuously triggered, nailing is performed once each time the push rod switch 113b is turned on. Generally, when the workload is large, or the workpiece 300 has good continuity or flatness and needs to be fastened more, the user can use the continuous driving mode to continuously nail to improve work efficiency.

[0117] However, there are also certain disadvantages in the continuous driving mode. For example, in order to further increase the nailing efficiency, when the trigger switch 113a is operated, the push rod switch 113b is triggered to open when it abuts against the workpiece 300, thereby driving the nail. Generally, when the push rod switch 113b abuts against the workpiece 300 and is turned on, the lower end of the guide assembly 114 is still a certain distance from the surface of the workpiece 300, which will affect the nailing quality and nailing effect, for example, the driven nail is partially exposed outside the workpiece 300.

[0118] To solve this problem, in the continuous drive mode, the controller 23 can at least control the nailing timing of the nail gun 100 according to the distance from the lower end of the guide assembly 114 to the surface of the workpiece 300. The so-called nailing timing can be understood as an objective nailing moment with time. Or the controller 23 can control the nailing timing according to the distance between other relatively fixed positions of the nail gun 100 and the surface of the workpiece 300. Figure 7 , the parameter detection unit 21 can be used to detect the distance from the lower end of the guide assembly 114 to the surface of the workpiece 300. In this embodiment, the parameter detection unit 21 can be a distance sensor, which can be set at the lower end of the guide assembly 114 (not shown), or set at other fixed positions of the nail gun 100, which is not limited here. In some embodiments, the distance sensor can be a laser sensor, an ultrasonic sensor, an infrared sensor, etc.

[0119] In the continuous drive mode, when the controller 23 detects that the distance from the lower end of the guide assembly 114 to the surface of the workpiece 300 is less than or equal to the preset distance, the motor 121 can be controlled to operate so that the firing assembly 16 can be released from the initial position for nailing. The preset distance can be any distance greater than or equal to 0. That is, nailing is triggered when the lower end of the guide assembly 114 contacts the surface of the workpiece 300, or the lower end of the guide assembly 114 is very close to the surface of the workpiece 300. This avoids the nail being driven out when it is far from the surface of the workpiece 300, affecting the nailing quality and nailing effect. When the controller 23 detects that the distance from the lower end of the guide assembly 114 to the surface of the workpiece 300 is greater than the preset distance, at least the nailing is not started until the monitored distance is less than or equal to the preset distance. It can also be understood that when it is detected that the distance from the lower end of the guide assembly 114 to the surface of the workpiece 300 is greater than the preset distance, the time to start nailing is extended.

[0120] In one embodiment, not starting nailing may include reducing the starting speed. For example, the motor 121 may be controlled to reduce the rotation speed to reduce the starting speed of nailing, thereby obtaining a relatively long time for the operation push rod switch 113b to be continuously pressed, so that the guide assembly 114 can be closer to the surface of the workpiece 300 when the user continues to press the push rod switch 113b, so that the nail gun 100 can have a shorter nailing distance in the continuous driving mode.

[0121] In one embodiment, Figure 7 The control circuit of the nail gun 100 shown may include at least one filter element, for example, the power elements VT1-VT6 in the power circuit 22 may be used as filter elements, or a filter capacitor may be provided in the control circuit. This embodiment does not limit the position of the filter element in the control circuit, the type of the filter element, etc., as long as the components in the control circuit that have a filtering function are within the protection scope of this application. In this embodiment, not starting nailing may also include extending the filtering time of the filter element in the control circuit, for example, controlling the filter element to filter at least twice. By extending the filtering time of the control circuit, a relatively long time for the operation push rod switch 113b to be continuously pressed can be obtained, so that the guide assembly 114 can be closer to the surface of the workpiece 300 when the user continues to press the push rod switch 113b, so that the nail gun 100 can have a shorter nailing distance in the continuous drive mode.

[0122] It is understandable that the controller 23 may also adopt other methods that require prolonging the time for starting nailing. In other words, other methods or concepts that extend the time for starting nailing in the continuous driving mode to reduce the distance between the guide assembly 114 and the surface of the workpiece 300 to achieve better nailing quality and nailing effect are within the protection scope of this application.

[0123] Assume that in the continuous driving mode, the nailing response time is the time from when the push rod switch 113b starts to abut against the surface of the workpiece 300 to when the firing assembly 16 drives out the nail. In this embodiment, the nailing response time is greater than or equal to the time from when the trigger switch 113a is operated to when the firing assembly 16 drives out the nail in the single driving mode. In the case where the nailing response time is not significantly increased, a better nailing effect and nailing quality are achieved.

[0124] refer to Fig. 22 The nail gun control process shown includes at least the following steps: S601, start.

[0125] S602, determine whether the nail gun is currently working in the continuous driving mode, if so, proceed to step S603, otherwise continue to monitor the working mode of the nail gun.

[0126] S603, detecting the distance between the lower end of the guide assembly and the surface of the workpiece 300.

[0127] S604, determining whether the distance is less than or equal to a preset distance, if so, executing step S605, otherwise executing step S606.

[0128] S605, controlling the motor to start nailing.

[0129] S606: Do not start nailing.

[0130] When users are pursuing fast and high-quality nailing, they also pay attention to the aesthetics of the nailing effect. Especially in the continuous drive mode, users generally continue to nail quickly by feeling or marking the nailing positions in advance, and to a certain extent, ensure that the spacing between nails is not much different. However, judging the nailing spacing, that is, the distance between two adjacent nails, requires a high level of user feeling, and marking the nailing positions in advance requires users to align the positions to ensure that the nailing spacing is basically consistent, which is not conducive to ensuring the nailing efficiency in the continuous drive mode.

[0131] In order to solve the above problems, the present embodiment controls the nailing spacing during rapid nailing, especially effectively controls the nailing spacing in the continuous drive mode. In the present embodiment, the controller 23 can at least detect the switch state of the trigger switch 113a, that is, whether it is operated, and can also detect whether the push rod switch 113b is against the workpiece 300. When the trigger switch 113a is continuously operated and the push rod switch 113b remains against the workpiece 300, the controller 23 is configured to control the distance interval of the nailing of the firing assembly 16, that is, the nailing spacing. It should be noted that the push rod switch 113b is against the workpiece 300, and the push rod switch 113b may be triggered or not. For example, the push rod switch 113b is connected to an eccentric wheel, or the push rod switch 113b includes an eccentric wheel, and the eccentric wheel can remain against the workpiece 300. When the user moves the nail gun 100, the eccentric wheel continues to rotate, and when it rotates to the first eccentric position, the push rod switch 113b is detected by the detection element, and it is considered that the push rod switch 113b is triggered. When the eccentric wheel rotates to the second eccentric position, the push rod switch 113b cannot be detected by the detection element, and it is considered that the push rod switch 113b is not triggered.

[0132] In one embodiment, reference Fig.23 The nail gun control circuit shown in the figure, the nail gun 100 may also include a detection device 26. The detection device 26 can at least detect the distance that the push rod switch 113b abuts against the workpiece 300 and moves on the workpiece 300. The controller 23 can obtain the above-mentioned moving distance, and control the firing assembly 16 to nail when the moving distance is substantially equal to the preset distance interval, so as to ensure that the distance interval between the nails is substantially consistent after each nailing.

[0133] In one embodiment, Fig.24As shown, the detection device 26 may include a first rolling element 261 disposed on the clip assembly 14 or the housing 11, and a first detection element 262 capable of detecting the number of rotations of the first rolling element 261. In one embodiment, a trigger element 2611 may be disposed on the first rolling element 261, and a sensing element 2621 may be disposed on the clip assembly 14 or the housing 11 as the first detection element 262. As the nail gun 100 is pressed by the user and moves on the surface of the workpiece 300, the first rolling element 261 rotates, and the trigger element 2611 is sensed by the sensing element 2621 as the first rolling element 261 rotates, so that the rotation of the first rolling element 261 by one rotation can be recorded. In one embodiment, the sensing element 2621 may be a Hall sensor, and the trigger element 2611 may be a magnet, or the sensing element 2621 may be a magnet, and the trigger element 2611 may be a Hall sensor. It is understandable that the contact point between the first rolling element 261 and the workpiece 300 is on the same horizontal plane as the contact point between the push rod switch 113b and the workpiece 300, which can ensure that the number of rotations of the first rolling element 161 can accurately reflect the moving distance of the push rod switch 113b on the workpiece 300 on the basis of the push rod switch 113b abutting against the workpiece 300. In one embodiment, the nail gun 100 is provided with a plurality of sensing elements 2621 and / or a plurality of triggering elements 2611, and the controller 23 can integrate a plurality of sets of detection data to more accurately identify the moving distance of the push rod switch 113b abutting against the workpiece 300. In this embodiment, while the push rod switch 113b remains abutting against the workpiece 300, the push rod switch 113b also remains in a triggered state.

[0134] In one embodiment, reference Fig.25, the detection device 26 may further include a second rolling element 263 at least linked to the push rod switch 113b, and a second detection element 264 capable of detecting at least the number of rotations or the rotation state of the second rolling element 263. In the present embodiment, the second rolling element 263 may be an eccentric wheel, which can drive the push rod switch 113b to move up and down during the rotation of the eccentric wheel, thereby periodically triggering the push rod switch 113b. It is understandable that a trigger element 2631, such as a magnet or a Hall sensor, may be provided on the push rod switch 113b, and a second detection element 264 capable of sensing the trigger element 2631 may be provided in the housing 11, such as a Hall sensor or a magnet. In the present embodiment, although the push rod switch 113b is kept against the workpiece 300, the push rod switch 113b is periodically triggered as the second rolling element 263, i.e., the second eccentric wheel, rotates. When the push rod switch 113b is triggered, the controller 23 may control the firing assembly 16 to nail. In one embodiment, in order to control the nailing interval, the controller 23 can control the firing assembly 16 to nail when the number of rotations of the second rolling element 263 reaches a threshold number of rotations and the push rod switch 113b is triggered.

[0135] In one embodiment, the detection device 26 may also be a laser displacement sensor, which can directly detect the displacement of the nail gun 100 against the workpiece 300. In one embodiment, the detection device 26 may also be an acceleration sensor, which can detect the acceleration of the nail gun 100 against the workpiece and obtain the displacement after time integration.

[0136] In one embodiment, continue to refer to Fig.23 The nail gun 100 may further include an interactive device 20. In this embodiment, the interactive device 20 may be operated by a user to set a plurality of nailing gears. Different nailing positions correspond to different spacing distances, that is, the spacing between nails driven out is different under different nailing gears. The controller 23 may change the nailing distance interval in combination with the nailing gear set by the user.

[0137] In one embodiment, the interaction device 20 may be a key or a code disk or an operation screen or a multiplexing trigger switch 113a. In some embodiments, the interaction device 20 may also be an intelligent interaction device such as a voice interaction device.

[0138] While users pursue the quality and aesthetics of nailing guns, they also pay more attention to the rapidity of nailing response. In particular, the continuous drive mode itself can improve the nailing efficiency. If the timeliness of nailing response in the continuous drive mode can be improved, the nailing efficiency in the continuous drive mode will be further improved. Of course, the timeliness of nailing response in the single drive mode is also conducive to improving the nailing efficiency and giving users a better operating experience.

[0139] Under normal circumstances, after a nailing cycle is completed, the firing assembly 16 stops at the initial position and the motor 121 stops rotating. In this embodiment, a nailing cycle can be divided into an upper half cycle and a lower half cycle. In the upper half cycle, the motor 121 drives the firing assembly 16 to move from the initial position to the firing position and drive the nail; in the lower half cycle, the motor 121 drives the firing assembly 16 to move from the firing position and stop at the initial position. In the upper half cycle, the speed of the motor 121 at least includes a stage of increasing from zero, and the motor speed in the middle stage of the upper half cycle can of course remain unchanged, decrease, or increase; in the lower half cycle, the speed of the motor 121 at least includes a stage of decreasing to zero, and the motor speed in the middle stage of the lower half cycle can of course remain unchanged, increase, or decrease.

[0140] Fig.26 The figure shows the change of the speed of the motor 121 in a nailing cycle under normal conditions. The controller 23 detects the start signal of the current nailing cycle T1 at time t0, and controls the motor 121 to start running, so that the motor 121 starts to rotate with a speed; it is assumed that the upper half of the cycle ends at time t1, and the firing assembly 16 starts to return to the initial position; at time t2, the firing assembly 16 stops at or near the initial position, and the speed of the motor 121 drops to zero. The speed of the motor 121 at time t1 is not representative in a nailing cycle. It can be understood that the speed of the motor 121 at time t1 may be the maximum speed in the entire nailing cycle, or the minimum speed, or any speed value between the maximum speed and the minimum speed.

[0141] In this embodiment, reference Fig. 27 In the control circuit of the nail gun shown, the controller 23 can detect the switch state or the operated state of the trigger switch 113a and the push rod switch 113b, so that the start signal can be obtained when the trigger switch 113a is operated and the push rod switch 113b is turned on. It can be understood that when the trigger switch 113a remains in the operated state, the controller 23 obtains the start signal for starting the continuous drive mode when the push rod switch 113b is turned on; when the push rod switch 113b is turned on, the trigger switch 113a is operated, and the controller 23 obtains the start signal for starting the single drive mode.

[0142] In the prior art, if the controller 23 detects a start signal during the current nailing cycle, the controller 23 will respond to the start signal and control the motor 121 to operate after the current nailing cycle ends.

[0143] In this embodiment, if the controller 23 detects a start signal in the current nailing cycle, the controller 23 can at least control the motor 121 to continue to operate until the next nailing cycle to drive out the nail, or it is understood that it can at least operate until the end of the first half of the next nailing cycle. It is understandable that the user can generally operate the trigger switch 113a or the push rod switch 113b again to generate a start signal after the second half of the current nailing cycle begins, that is, after the firing assembly 16 nails, the controller 23 can obtain the start signal in the process of returning upward from the firing position to the initial position. Exemplarily, after the controller 23 detects the start signal in the second half of the current nailing cycle, it can control the motor 121 to accelerate or decelerate or run at a constant speed to continue to drive the firing assembly 16 back to the initial position, and then quickly move from the initial position to the firing position to complete the nailing.

[0144] In one embodiment, when the controller 23 detects a start signal in the second half of the current nailing cycle, it can at least adjust the duty cycle of the control signal to control the motor 121 to continue to operate at least until the end of the first half of the next nailing cycle. In one implementation, the way in which the controller 23 adjusts the duty cycle may include at least one of increasing the duty cycle, reducing the duty cycle, and keeping the duty cycle unchanged. In some embodiments, when the controller 23 detects a start signal in the second half of the current nailing cycle, on the basis of ensuring that the speed of the motor 121 is not zero, it can also adjust the output power of the motor 121 or parameters related to the output power, or adjust the torque of the motor 121.

[0145] In one embodiment, Fig.28 It is a schematic diagram of the change in the rotation speed of the motor 121 after the start signal is detected before the current nailing cycle ends. Fig.29 The control from t0 to t2 can refer to Fig.26 Description. Among them, time t3 is the moment when the controller 23 detects the start signal again, which can also be understood as the moment when the next nailing cycle T2 starts, or the moment when the controller 23 responds to the nailing control of the next nailing cycle T2 when the current nailing cycle T1 has not ended. Time T4 is the moment when the nailing of the next nailing cycle T2 ends and the firing assembly 16 returns to the initial position, that is, the shutdown time. Generally, the time of each nailing cycle of the nail gun 100 is basically the same, that is, it can be understood that T1 is basically equal to T2. By Fig.28 It can be seen that the time between time t0 and time t4 is less than T1+T2, or less than 2T1, or less than 2T2. By controlling the speed of the motor 121 to be at least non-zero in response to the start signal of the next nailing cycle before the current nailing cycle ends, the time for the speed of the motor 121 to drop to zero and then increase again from zero between two consecutive nailing cycles is saved, thereby improving the efficiency of continuous nailing.

[0146] against Fig.29 The spring-type nail gun 200 shown includes: a housing 21, a motor 22, an energy storage device 23, a clip assembly 24, a transmission assembly 25, and a firing assembly 26. The housing 21 may include a main housing 211 and a handle housing 212. A trigger switch 2121 is provided at the handle housing 212, and the user controls the start and stop of the nail gun 200 through the trigger switch 2121. The housing 21 is formed with a fourth accommodation space 2111 extending in the direction of the fourth straight line 201 and a fifth accommodation space 2112 extending in the direction of the fifth straight line 202. The energy storage device 23 is arranged in the fourth accommodation space 2111, and the motor 22 is arranged in the fifth accommodation space 2112. The motor 22 can drive the transmission assembly 25 to rotate, thereby driving the energy storage device 23 to store elastic force or release elastic force. In this embodiment, the transmission assembly 25 is basically consistent with the transmission assembly principle in the nail gun 100 in the above embodiment, and the transmission assembly 25 may also include a driving wheel 251. The transmission process of the transmission assembly 25 or the driving wheel 251 is not described in detail here.

[0147] The clip assembly 24 is arranged in the direction of the sixth straight line 203 which is parallel to the fifth straight line 102. The clip assembly 24 may be consistent with the clip assembly 14 in the cylinder nail gun 100 in the above embodiment, and will not be described in detail here.

[0148] The firing assembly 26 at least includes a firing pin 261, and the firing pin 261 can also refer to the firing pin 161 in the nail gun 100 in the above embodiment. In this embodiment, the transmission assembly 25 drives the firing pin 261 to return to the initial position and drives the energy storage device 23 to start energy storage. In other embodiments, when the transmission assembly 25 drives the firing pin 261 to move upward, the firing assembly 26 can drive the energy storage device 23 to store energy. In this embodiment, the specific process of the transmission assembly 25 driving the firing pin 261 or the energy storage device 23 is not described in detail.

[0149] The energy storage device 23 can also be called an energy storage mechanism, which at least provides stored energy for the firing assembly 25 to drive the nail. In this embodiment, when the motor 22 drives the transmission assembly 25 to drive the firing assembly 26 to move upward, the elastic force stored in the energy storage device 23 continues to increase. When the firing assembly 26 is at the initial position, the elastic force stored in the energy storage device 23 is the largest. As the motor 22 continues to drive the rotating assembly 25, the energy storage device 23 can release the elastic force in a short time and drive the firing pin 261 to quickly reach the firing position to achieve nailing.

[0150] It should be noted that the initial position and firing position of the firing assembly 26 in the nail gun 200 in this embodiment can be referred to Figure 3 and Figure 4 The location is indicated and will not be described in detail here.

[0151] refer to Figure 31 to Figure 33 The energy storage device 23 includes a spring 231, a spring seat 232 abutting against the upper end of the spring 231, and an elastic force adjustment component 233 capable of adjusting the maximum stored elastic force of the spring 231, and also includes a lever 234 disposed in the spring 231. The maximum stored elastic force of the spring 231 can be understood as the elastic force of the spring 231 when it is in the maximum compression state in the nail gun, or the elastic force of the spring 231 when the firing component 25 is in the initial position.

[0152] In this embodiment, the elastic force adjustment component 233 at least includes a movable member 2331 that can abut against the other end of the spring seat 232, and an adjustment knob 2332 that can be threadedly connected to the movable member 2331. Among them, the top of the lever 234 can be provided with a thread, which can at least be threadedly connected to the movable member 2331. In order to adjust the maximum stored elastic force of the spring 231, the user can rotate the adjustment knob 2332 when the nail gun 200 is stopped, and the adjustment knob 2332 can drive the movable member 2331 to move downward along the lever 234, so that the movable member 2331 pushes the spring seat 232 to compress the spring. The user can view the size or range of the maximum stored elastic force in real time through the elastic force adjustment display part (not shown) exposed outside the housing 21.

[0153] Generally, the maximum stored elastic force is adjusted when the nail gun 200 is in a stopped state, and after the nail gun 200 is stopped, the firing assembly 26 is in the initial position, the spring 231 is in the maximum compressed state, and the elastic force is relatively large. Therefore, when the user rotates the adjustment knob 2332, he will encounter greater resistance, and the adjustment feel is poor.

[0154] It has been found through research that if the pressure of the spring 231 on the adjusting knob 2332 can be reduced or removed, the adjusting knob 2332 can be easily rotated. Since the rotation of the adjusting knob 2332 can drive the movable member 2331 to rotate, and the movable member 2331 directly abuts against one end of the spring seat 232, and the other end of the spring seat 232 is connected to the spring 231. Therefore, the pressure between the contact surface of the spring seat 232 and the movable member 2331 can be adjusted, for example, the spring seat 232 and the movable member 2331 can be opened a little distance, so that there is no pressure between the two, or the pressure between the two is reduced. In other words, the above problem can be solved by releasing at least part of the pressure between the spring seat 232 and the movable member 2331.

[0155] refer to Figure 29 to Figure 32, the nail gun 200 further includes a first external adjustment member 27. The first external adjustment member 27 can pass through the housing 21 and be connected to the middle member 235, and the middle member 235 is connected to the spring seat 232. The first external adjustment member 27 can be operated by a user to toggle the middle member 235, so that the middle member 235 drives the spring seat 232 to move along the lever 234, or at least can toggle the middle member 235 to drive the spring seat 232 to move downward along the lever 234, so that the distance between the spring seat 232 and the movable member 2331 is greater than or equal to zero. Since the pressure from the spring seat 232 is reduced or disappears, the user can easily rotate the adjustment knob 2332 to increase or decrease the maximum stored elastic force of the spring 231. In this embodiment, the middle member 235 may include a clamping portion 2351 that clamps the spring seat 232, and a toggle portion 2352 that is partially exposed outside the housing 21. The first external adjustment member 27 can remove the toggle portion 2352 , that is, when there is no need to adjust the maximum stored elastic force, the first external adjustment member 27 can be removed to avoid affecting the normal nailing operation.

[0156] In one implementation, a connection hole (not shown) may be directly provided on the spring seat 232 , and the first external adjustment member 27 may be inserted into the connection hole 2321 . The user may directly drive the spring seat 232 to move by turning the first external adjustment member 27 without the need for the intermediate member 235 .

[0157] refer to Fig.33 The nail gun 200 further includes a transmission member 28 disposed between the spring seat 232 and the spring 231. Generally, the spring seat 232 can push the spring 231 to be compressed downward along the direction of the lever 234 under the drive of the movable member 2331, and there is sliding friction between the spring seat 232 and the spring 231. The transmission member 28 can convert the sliding friction between the spring seat 232 and the spring 231 into rolling friction. In one implementation, the transmission member 28 can be a rolling bearing. In one embodiment, the transmission member 28 can be a ball disposed in the spring seat 232, wherein a groove is provided in the spring seat 232 for accommodating the ball, and the ball is in direct contact with the spring, so that when the spring seat 232 compresses the spring 231 downward under the drive of the movable member 2331, the friction between the spring seat 231 and the spring 231 can be converted into rolling friction with the help of the ball, thereby reducing the force of compressing the spring 231. Since the force is mutual, the pressure between the spring seat 231 and the movable part 2331 is also reduced, thereby facilitating the adjustment of the maximum stored elastic force of the spring 231 by turning the adjustment knob 2332 .

[0158] In one embodiment, the nail gun 200 may further include a second external adjustment member 29. Fig.31The second external adjustment member 29 can be operated by the user to turn the motor 22 or the drive wheel 251, so that when the nail gun 200 is stopped or not powered on, the firing assembly 26 can be driven to move from the initial position and maintain it to the firing position. In this embodiment, the second external adjustment member 29 can be removed when not in use to avoid affecting the nailing operation. By slowly driving the firing assembly 26 downward, the elastic force of the spring 231 is released, and the squeezing force on the spring seat 232 is reduced or disappears, so that the pressure between the spring seat 232 and the movable member 2331 is also released. The user can easily rotate the adjustment knob 2332 to adjust the maximum stored elastic force of the spring 231.

[0159] Continue to refer Fig.29 The trigger switch 2121 on the nail gun 200 is configured to be operated when the firing assembly 26 is driven, that is, the user controls the start and stop of the nail gun 200 through the trigger switch 2121. The nail gun 200 also includes a push rod switch 220 disposed at the front end of the firing assembly 26, and the push rod switch 220 is configured to be turned on when pressed against the workpiece in the nailing direction, wherein the nailing direction is substantially parallel to the direction of the fourth straight line 201. In this embodiment, the push rod switch 220 may include a contact member 2201 disposed outside the housing 21 and located at the lowest end in the nailing direction, and a magnet or a Hall element may be disposed at the upper end of the trigger member 2201, which can sense each other with the Hall or magnet element in the housing 21. When the contact member 2201 is pressed against the surface of the workpiece and the nail gun 200 is continuously pressed, the contact member 2201 and the housing 21 generate relative displacement, so that the magnet in the housing 21 can sense the Hall element at the top of the contact member 2201, and the push rod switch 220 is turned on. Or the Hall element in the housing 21 can generate induction with the magnet at the top of the contact piece 2201, and the push rod switch 220 is turned on.

[0160] Generally speaking, the nail gun 200 has two working modes: a continuous drive mode and a single drive mode. When the push rod switch 220 abuts against the workpiece, the trigger switch 2121 is operated to turn on the single drive mode of the nail gun 200 and drive a nail. When the trigger switch 2121 is operated and the push rod switch 220 abuts against the workpiece, the continuous drive mode of the nail gun 200 can be turned on. In the continuous drive mode, the trigger switch 2121 is continuously operated, and the user only needs to intermittently push the push rod switch 220 against the workpiece to continuously drive nails. That is to say, when the trigger switch 2121 is constantly triggered by the user, a nail is driven each time the push rod switch 220 abuts against the workpiece.

[0161] refer to Fig.34The control circuit of the nail gun 200 shown may include a battery pack 230, a controller 240, a motor 22, a light emitting device 250, a trigger switch 2121, a push rod switch 220, and a release switch 260. The controller 240 can detect whether the release function of the nail gun 200 is triggered, and when the release function is detected to be triggered, the controller 240 can control the motor 22 to operate so that the firing assembly 26 moves and remains at the firing position, so that the elastic force of the spring 231 is released, and the corresponding pressure of the spring 231 on the spring seat 232, and the pressure between the spring seat 232 and the movable member 2331 are also released. After the pressure between the spring seat 232 and the movable member 2331 is released, the user can easily rotate the adjustment knob 2332 to adjust the maximum stored elastic force of the spring 231.

[0162] In one implementation, the release function can be triggered when the trigger switch 2121 and the push rod switch 220 are operated in a preset manner. The so-called preset manner can be any switch operation mode that is different from the operation modes of the two switches in the above-mentioned single drive mode and continuous drive mode. For example, the release function can be triggered when the trigger switch 2121 is quickly triggered at least twice and the push rod switch 220 is also turned on.

[0163] In one implementation, the nail gun 200 may further include a release switch 260, which can directly trigger the release function of the nail gun after being operated. The release switch 260 may be a trigger switch 2121 or a push rod switch 220, or other switches, which are not limited here.

[0164] In one embodiment, after the controller 240 detects that the release function of the nail gun 200 is triggered, the motor 22 can be controlled to rotate in the reverse direction to drive the firing assembly 26 to move to the firing position at a slower speed and maintain it at the firing position, making the release function safer. It is understandable that the mechanical structure in the nail gun 200 can be coordinated in order to make the motor 22 rotate in the reverse direction, which will not be described in detail here.

[0165] In this embodiment, the nail gun 200 further includes a light emitting device 250, which may be one or more LED lamp beads arranged at different positions, or a row of light strips, or a digital tube, or a display screen, etc. Reference may be made to the introduction of the light emitting device 18 in the nail gun 100, which will not be described in detail here. In this embodiment, after detecting that the release function of the nail gun 200 is triggered, the controller 240 may control the light emitting device 250 to issue a prompt message. In one implementation, the light emitting device 250 may output the above prompt message in at least one form of quantity, light color, light frequency, number of flashes, brightness level, and light display content.

[0166] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A nail gun, comprising: case; A motor, disposed in the housing; A firing assembly is configured to move from an initial position to a firing position to drive a nail into a workpiece within a nailing cycle, and to move from the firing position to the initial position; A guide assembly, configured to at least guide the firing assembly to nail in a nailing direction; a trigger switch disposed on the housing and configured to be operated when the firing assembly is intended to be actuated; A push rod switch configured to be turned on when pressed against the workpiece in a nailing direction; A controller, capable of at least controlling the motor to operate so that the firing assembly can drive a nail; The controller is configured to: When the trigger switch is continuously operated and the push rod switch is kept against the workpiece, the distance interval of the nailing of the firing assembly is controlled.

2. The nail gun according to claim 1, characterized in that: The nail gun also includes a detection device, which is configured to at least detect the distance that the push rod switch remains against the workpiece and moves on the workpiece; the controller is configured to control the firing assembly to nail when the moving distance is substantially equal to the distance interval.

3. The nail gun according to claim 2, characterized in that: The detection device includes a first rolling element arranged on the clip assembly and a first detection element for detecting the number of rolling turns of the first rolling element.

4. The nail gun according to claim 3, characterized in that: The first rolling element is disposed on the housing.

5. The nail gun according to claim 4, characterized in that: A trigger element is disposed on the first rolling element, and a sensing element is disposed on the housing or the clip assembly. When the first rolling element rolls along the workpiece, the sensing element can sense the trigger element.

6. The nail gun according to claim 5, characterized in that: The sensing element includes a Hall sensor, and the triggering element includes a magnet.

7. The nail gun according to claim 2, characterized in that: The detection device includes a second rolling element linked to the push rod switch, and a second detection element for detecting the number of rotations or the rotation state of the second rolling element.

8. The nail gun according to claim 7, characterized in that: The second rolling element is configured as an eccentric wheel; the eccentric wheel can open the push rod switch during rolling.

9. The nail gun according to claim 2, characterized in that: The detection device also includes an acceleration sensor arranged on the housing.

10. The nail gun according to claim 2, characterized in that: The detection device also includes a displacement sensor arranged on the housing.

11. The nail gun according to claim 1, characterized in that: The nail gun further comprises an interactive device, which is configured to be operable by a user to set a plurality of nailing gears, and different nailing gears correspond to different distance intervals.

12. The nail gun according to claim 11, characterized in that The interactive device includes at least one of a button, a code disk, and an operation screen.

Images