Safety hammer and control method thereof

Abstract

This invention relates to a safety hammer and its control method. The safety hammer includes a housing, a drive assembly, a position detection assembly, and a controller. An impact head is movably disposed within the housing, and has a mounting port for the impact head to extend and retract. The drive assembly includes a movably disposed drive unit connected to the impact head, used to drive the impact head to extend from the mounting port to strike or retract to reset. The position detection assembly generates a reset signal at least when the impact head is in its reset position. The controller is electrically connected to the drive assembly and the position detection assembly. Upon completion of a striking task or receipt of a stop signal, the controller controls the drive unit to reset the impact head, and upon receiving a reset signal, the controller controls the drive unit to stop. This not only achieves automatic and precise reset of the safety hammer's impact head, but also improves the stability of the safety hammer's operation through intelligent closed-loop control. This enhances the safety, convenience, durability, and adaptability of the safety hammer.

Description

Technical Field

[0001] This invention relates to the field of fire-fighting equipment technology, and in particular to a safety hammer and its control method. Background Technology

[0002] In emergency escape scenarios such as vehicle accidents and fires, safety hammers are core tools for breaking windows and escaping trapped individuals, and their performance directly affects personal safety in emergency situations. To overcome the drawbacks of manual striking, electric safety hammers have gradually appeared on the market. However, some existing electric safety hammers have their impact head exposed outside the casing after the strike, posing a significant safety hazard and affecting subsequent normal use. Other products require manual repositioning of the impact head, causing inconvenience for users. Summary of the Invention

[0003] The main objective of this invention is to propose a safety hammer and its control method, which aims to solve the safety hazards caused by the inability of the impact head to reset in existing electric safety hammers, as well as the inconvenience of manually resetting the impact head.

[0004] To achieve the above objectives, the present invention provides a safety hammer, comprising: The housing contains an impact head that is movably mounted therein, and has a mounting port on it for the impact head to extend and retract. The driving assembly includes a movable driving part, which is drivenly connected to the impact head to drive the impact head to extend from the mounting port to strike or retract and reset. A position detection component is used to generate a reset signal at least when the impact head is reset to the position. The controller is electrically connected to the drive assembly and the position detection assembly. When the striking task is completed or a stop signal is received, the controller controls the drive unit to drive the impact head to reset. When the reset signal is received, the controller controls the drive unit to stop.

[0005] Optionally, the position detection component is provided corresponding to the drive component and / or the impact head.

[0006] Optionally, the position detection component includes a signal transmitter and a signal receiver, one of which is located in the housing and the other in the drive unit or the impact head. When the drive unit drives the impact head to reset to its position, the two components are opposite to each other and trigger each other to generate the reset signal.

[0007] Optionally, the drive assembly further includes a power shaft and a mating part. The power shaft is disposed inside the housing and can rotate along its own axis. The impact head is circumferentially fixed and axially movable in a mating connection with the power shaft. The driving part is disposed on the impact head and cooperates with the mating part, so that when the driving part rotates with the impact head, under the action of the mating part, it can drive the impact head to extend axially from the mounting port to strike or retract and reset.

[0008] Optionally, the mating part is fixed relative to the housing and forms a mating surface, the mating surface including a spiral climbing section and an axial falling section continuously arranged in the circumferential direction; An elastic element is provided between the impact head and the power shaft; the driving part is in contact with the mating surface. When it rotates, the driving part climbs along the spiral climbing section, which can drive the impact head to contract and compress the elastic element. When the driving part falls back from the highest point of the spiral climbing section along the axial falling section, the elastic element can be reset and drive the impact head to extend out from the mounting port. The position detection component includes a signal transmitter and a signal receiver, one of which is located at the highest point of the spiral climbing section, and the other is located at the drive unit or the impact head.

[0009] Optionally, the end of the power shaft is axially movably inserted into the impact head, and the power shaft has an elongated hole extending radially near the end; the impact head has an insertion hole extending radially at a position corresponding to the elongated hole; the drive unit includes a pin, which passes through the insertion hole and the elongated hole, and both ends of the pin protrude from the outer wall of the impact head and can be slidably engaged with the spiral climbing section; The position detection component has a signal transmitter and a signal receiver, one of which is located on the surface of the pin facing the housing, and the other is located on the housing and is positioned at the highest point of the spiral climbing section.

[0010] Optionally, the safety hammer also includes a control operation component for user operation, and generates start signals, stop signals, and different mode signals; The controller is electrically connected to the drive component, the position detection component, and the control operation component. When it receives the start signal and the mode signal, it controls the drive unit to drive the impact head to strike in a preset mode.

[0011] Optionally, the control operation component includes: A mode switching switch, electrically connected to the controller, is used to selectively generate different mode signals and transmit them to the controller; and, A start / stop switch is electrically connected to the controller to generate the start signal or the stop signal and send it to the controller.

[0012] Optionally, the control operation component includes an integrated gear switch, which has at least four independent adjustment gears to generate the start signal, the stop signal, and at least two of the mode signals respectively, and transmits the corresponding signals to the controller.

[0013] Optionally, the mode signal includes at least a single-hit signal and a continuous-hit signal.

[0014] The present invention also proposes a control method based on the above-mentioned safety hammer, the control method comprising: The drive assembly of the safety hammer is controlled to strike in a preset mode; Receive a signal indicating completion of the attack or a shutdown signal; The drive assembly is controlled to cause the impact head to retract and reset towards the mounting port; Receive reset signal; The drive assembly is controlled to stop the impact head.

[0015] Optionally, the safety hammer further includes a control operation component for generating a start signal, a stop signal, and different mode signals; The step of controlling the drive assembly of the safety hammer to strike in a preset mode includes: Receive the start signal; Receive the mode signal; According to the type of the mode signal, the drive component is controlled to strike in a preset mode; wherein, if the mode signal is configured as a single strike signal, the preset mode is switched to the single strike mode; if the mode signal is configured as a continuous strike signal, the preset mode is switched to the continuous strike mode.

[0016] The technical solution provided by this invention has at least the following advantages: The safety hammer provided by this invention includes a housing, a drive assembly, a position detection assembly, and a controller. An impact head is movably mounted within the housing, with a mounting port for the impact head to extend and retract. The drive assembly includes a movably mounted drive unit connected to the impact head, used to drive the impact head to extend from the mounting port to strike or retract and reset. The position detection assembly generates a reset signal at least when the impact head is reset to its correct position. The controller is electrically connected to the drive assembly and the position detection assembly. Upon completion of the striking task or receipt of a stop signal, the controller controls the drive unit to reset the impact head, and upon receiving the reset signal, it controls the drive unit to stop. Thus, through the electrical linkage of the controller, drive assembly, and position detection assembly, automatic and precise reset of the safety hammer's impact head is achieved. This eliminates the safety hazards caused by the inability to reset the impact head in existing safety hammers, solves the inconvenience of manual impact head reset, and reduces mechanical wear and extends product lifespan through precise control. Simultaneously, intelligent closed-loop control improves the stability of the safety hammer's operation, thereby enhancing its safety, convenience, durability, and adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of one embodiment of a safety hammer (in an idle state) provided by the present invention; Figure 2 for Figure 1 The safety hammer is shown in a cross-sectional view along AA. Figure 3 for Figure 1 A schematic diagram of the structure of the safety hammer (hidden part of the housing); Figure 4 for Figure 1 A structural diagram of the safety hammer regarding the power shaft, impact head, and drive assembly; Figure 5 for Figure 1 A cross-sectional view of the safety hammer along BB; Figure 6 A schematic diagram of the structure of an embodiment of a safety hammer (in striking state) provided by the present invention; Figure 7 for Figure 6 A cross-sectional view of the safety hammer along CC; Figure 8 for Figure 6A schematic diagram of the structure of the safety hammer (hidden part of the housing); Figure 9 for Figure 6 A structural diagram of the safety hammer regarding the power shaft, impact head, and drive assembly; Figure 10 A first flowchart of a safety hammer control method provided by the present invention; Figure 11 The second flowchart of a safety hammer control method provided by the present invention.

[0019] Explanation of icon numbers: 100 Safety hammer; 1 Housing; 11 Mounting port; 2 Drive assembly; 21 Power shaft; 211 Elongated hole; 212 Shoulder; 213 Retaining rib; 22 Motor; 221 Motor body; 222 Motor shaft; 23 Drive section; 231 Pin; 232 Bushing; 24 Mating part; 241 Spiral climbing section; 242 Axial falling section; 25 Elastic element; 3 Impact head; 31 Second end; 32 Receiving groove; 33 Annular groove; 34 Shaft section; 35 Stepped surface; 4 Annular shell; 41 Annular rib; 42 Bearing chamber; 43 First end face; 5 Bearing; 61 Protrusion; 62 Stop groove; 7 Position detection assembly; 71 Signal transmitter; 72 Signal receiver; 8 Control operation assembly.

[0020] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] In emergency escape scenarios such as vehicle accidents and fires, safety hammers are core tools for breaking windows and escaping trapped people, and their performance directly affects personal safety in emergency situations. To overcome the drawbacks of manual striking, electric safety hammers have gradually appeared on the market.

[0023] To achieve automatic reset of the impact head of the safety hammer 100, this invention improves the safety hammer 100. The structure of the safety hammer 100 is analyzed in detail below with reference to the accompanying drawings.

[0024] Please see Figures 1 to 9 The safety hammer 100 includes a housing 1, a drive assembly 2, and an impact head 3.

[0025] Please see Figure 1 and Figure 2The housing 1 is hollow and has an installation port 11 connecting to its interior. The drive assembly 2 is located inside the housing 1 and has a power shaft 21 that can rotate along its own axis. The drive assembly can be electrically driven, hydraulically driven, pneumatically driven, or other suitable mechanical drive structures. The impact head 3 is movably mounted on the housing 1, and the housing 1 has an installation port 11 for the extension and retraction of the impact head 3. The impact head 3 is circumferentially fixed and axially movable with the power shaft 21, and an elastic element 25 is provided between the impact head 3 and the power shaft 21. "Circumferentially fixed" means that the impact head 3 and the power shaft 21 move synchronously in the circumferential direction, with essentially no relative rotation between them. "Axially movable" means that the impact head 3 can move relative to the power shaft 21 in the axial direction.

[0026] Please see Figure 2 and Figure 3 The drive assembly 2 also includes a drive section 23 disposed on the impact head 3 and a mating section 24 fixed relative to the housing 1. At least one set of mating surfaces extending circumferentially are formed on the mating section 24, and the mating surfaces include a circumferentially continuous spiral climbing section 241 and an axial falling section 242.

[0027] The drive unit 23 can rotate with the impact head 3. The drive unit 23 can climb along the spiral climbing section 241 to drive the impact head 3 toward the elastic member 25 and compress the elastic member 25. When the drive unit 23 falls back from the highest point of the spiral climbing section 241 along the axial falling section 242, the elastic member 25 can be reset and drive the impact head 3 to extend out from the mounting port 11.

[0028] In the technical solution of this invention, an elastic element 25 is used to store and store energy, gradually accumulating the energy from the continuous rotation of the motor 22, and then releasing it instantaneously. This results in high energy transfer efficiency, concentrated impact kinetic energy, and sufficient impact force on tempered glass, thereby improving the success rate of breaking windows. Furthermore, the entire process of energy storage and triggering is automatically completed by the motor 22, eliminating the need for manual operation. With the cooperation of a stable and reliable transmission structure, the window-breaking action can be completed quickly and in one go, thus improving the ease of use and success rate of the safety hammer 100 in emergency scenarios.

[0029] Meanwhile, the use of a cam mating surface and elastic element 25 for power transmission eliminates the need for complex and easily damaged transmission components, resulting in high structural reliability of the drive assembly 2. This ensures stable triggering of the safety hammer 100 in emergency situations, guaranteeing reliable emergency use. Furthermore, the impact head 3 is circumferentially fixed and axially movable with the power shaft 21. Combined with the cam trajectory of spiral climbing and axial retraction, it achieves an automatic cycle of retraction energy storage and extension impact. This simplifies the overall structure of the drive assembly 2, making it suitable for emergency scenarios in confined spaces such as vehicles, ensuring smooth window-breaking actions for users.

[0030] The present invention does not impose a specific limitation on the number of mating surfaces. In one embodiment, a set of mating surfaces extending circumferentially are formed on the mating part 24.

[0031] In one embodiment, please refer to Figure 3 and Figure 4 , Figure 8 and Figure 9 The mating part 24 is arranged around the periphery of the impact head 3, and two sets of mating surfaces are formed thereon in a circumferential direction. The spiral climbing section 241 and the axial falling section 242 of the two sets of mating surfaces are connected end to end on the circumference. Correspondingly, two driving parts 23 are provided, which are respectively arranged on both sides of the impact head 3 in the radial direction, and are respectively slidably arranged on the two sets of mating surfaces.

[0032] In this embodiment, the mating part 24 is arranged around the periphery of the impact head 3, forming an integral annular end face cam structure. Two sets of mating surfaces are formed circumferentially distributed on the annular mating part 24. Each set of mating surfaces includes a spiral climbing section 241 and an axial falling section 242, which are connected end-to-end on the circumference of the two sets of mating surfaces. Two driving parts 23 are provided, located on opposite radial sides of the impact head 3, with each driving part 23 slidingly engaging with one set of mating surfaces.

[0033] The dual drive units 23 and dual mating surfaces are arranged symmetrically on both sides of the radial direction. The impact force and the cam reaction force are balanced in a concentric manner, which enables the impact head 3 to always move in a straight line along the axis, thereby improving the stability and service life of the mechanism and enabling the safety hammer 100 to be reliably triggered in an emergency.

[0034] Furthermore, during the rotation of the power shaft 21, the two drive units 23 synchronously ascend from the two spiral climbing sections 241, ensuring that the impact head 3 experiences uniform force during the contraction and energy storage process. The elastic element 25 is compressed evenly, resulting in higher energy storage efficiency and more stable energy accumulation, thus guaranteeing a uniform impact force of the impact head 3. The two drive units 23 simultaneously reach the highest point of the cam and simultaneously fall back and release, concentrating the restoring force of the elastic element 25 along the axis. This makes the movement of the impact head 3 straighter and the impact point more precise, thereby improving the consistency and success rate of window breaking.

[0035] Furthermore, after the two drive units 23 simultaneously fall back and release, both drive units 23 are simultaneously at the lowest point of the two spiral climbing sections 241. Subsequently, the power shaft 21 continues to rotate, and the two drive units 23 can continue to climb along the two spiral climbing sections 241. In this way, the power shaft 21 continues to rotate, causing the drive units 23 to circumferentially move along the circumferential closed-loop mating surface, sequentially completing the spiral climbing energy storage and axial falling impact actions. With the reciprocating energy storage and release of the elastic element 25, driven by the continuous unidirectional rotation of the power shaft 21, the impact head 3 achieves automatic, continuous, and periodic extension and retraction striking action, realizing continuous window-breaking impact without additional control switching.

[0036] In one embodiment, the safety hammer 100 also includes a controller (not shown in the figure), which is electrically connected to the drive assembly 2. Upon completion of the striking task or receiving a stop signal, the controller controls the drive unit 23 to reset the impact head 3. Thus, after striking, the impact head 3 can actively retract and be stored. Once retracted, the entire impact head 3 is located within the housing 1. Preferably, after retracting, the impact head 3 and the mounting port 11 are axially spaced a certain distance apart. Therefore, the impact head 3 will not protrude for extended periods, eliminating safety issues such as scratches, accidental activation, and obstruction of escape, making it safer to use and store. Furthermore, the automatic reset action by the drive unit 23 eliminates the need for manual prying or pressing, making operation simple and responsive in emergency situations.

[0037] And, please see Figure 2 and Figure 5 The safety hammer 100 also includes a position detection component 7. The position detection component 7 generates a reset signal at least when the impact head 3 is reset to its position. The controller is electrically connected to the position detection component 7 and stops the drive unit 23 upon receiving the reset signal.

[0038] The position detection component 7 specifically collects the reset position status of the impact head 3 and generates a feedback signal. This signal, combined with the controller, enables closed-loop control, ensuring the impact head 3 fully retracts and avoiding safety risks caused by incomplete reset. Upon reset, the controller immediately stops the machine to prevent over-travel of the drive unit 23, mechanical hardening, or motor overload, thereby reducing component wear and structural jamming, and extending the service life of the safety hammer 100. The mechanical drive combined with position signal feedback standardizes the striking and reset actions of the electric hammer, making the safety hammer 100 less prone to jamming or failure during long-term operation, thus improving the overall operational stability of the safety hammer 100.

[0039] It should be noted that the controller is the core control hub of the safety hammer 100, preferably composed of a micro-microcontroller as the main control unit, integrating functional modules such as signal reception, logic operation, command output, delay control, and overload protection. The controller can receive external impact trigger signals and stop signals; receive real-time position feedback signals from the position detection component 7; issue control commands such as forward rotation impact, reverse rotation reset, and stop operation to the drive component 2; and has built-in delay program, overcurrent protection, and stall protection logic to prevent long-term overload damage to the drive unit 23 components.

[0040] The drive assembly 2 is an action actuator, including a drive unit 23, which is rigidly or flexibly connected to the impact head 3. The drive unit 23 has bidirectional axial driving capability, which can output power in the forward direction to push the impact head 3 out from the mounting port 11 of the housing to complete the window breaking, and output power in the reverse direction to pull or push the impact head 3 to retract and store it inward; the movement stroke is stable and the transmission is smooth.

[0041] The position detection component 7 is a state sensing unit, which is specifically used to collect the position status of the impact head 3 in real time. It can at least monitor the retraction stroke of the impact head 3 in real time and identify the reset position. The signal is uploaded to the controller in real time, which can help to realize over-travel protection, self-locking at the position, and motion status monitoring.

[0042] The present invention does not impose specific limitations on the placement of the position detection component 7. In one embodiment, the position detection component 7 is positioned corresponding to the drive component 2. In another embodiment, the position detection component 7 is positioned corresponding to the impact head 3. In yet another embodiment, the position detection component 7 is positioned corresponding to both the drive component 2 and the impact head 3.

[0043] This invention does not impose specific limitations on the form of the position detection component 7. The position detection component 7 can be in the form of an encoder, which can collect the rotational stroke or linear displacement information of the drive unit 23 in real time and convert it into a continuous pulse position signal transmitted to the controller; the controller determines the reset position of the impact head 3 based on the stroke position signal fed back by the encoder and controls the drive unit 23 to stop in time. The position detection component 7 can also be a common sensor. The following description uses a common sensor as an example of the position detection component 7.

[0044] This invention does not impose specific limitations on the triggering method of the position detection component 7. The position detection component 7 can be triggered via photoelectric transmission and reception. It can also be triggered via mechanical contact, such as a mechanical limit switch. Furthermore, it can be triggered using a combination of Hall effect sensing and a magnet, such as a Hall sensor. The following explanation uses "the position detection component 7 being triggered via photoelectric transmission and reception" as an example.

[0045] Please combine Figure 2 and Figure 5The position detection component 7 includes a signal transmitter 71 and a signal receiver 72, one of which is located in the housing 1 and the other is located in the drive unit 23 or the impact head 3. When the drive unit 23 drives the impact head 3 to reset to the position, the two are relative to each other and trigger to generate a reset signal.

[0046] This invention does not impose specific limitations on the photoelectric transceiver triggering method of the position detection component 7. In one embodiment, when the impact head 3 extends to strike, the signal between the signal transmitter 71 and the signal receiver 72 can be normally connected. When the impact head 3 is fully retracted and reset, the signal transmission path of the signal transmitter 71 is blocked, and the signal receiver 72 cannot receive the signal. It then sends a low-level reset signal to the controller, determining that the reset is complete.

[0047] In one embodiment, when the impact head 3 extends to strike, the angle or position of the signal transmitter 71 and the signal receiver 72 is misaligned, resulting in wireless signal transmission. When the impact head 3 is fully retracted and reset, the signal transmitter 71 and the signal receiver 72 are perfectly aligned, enabling directional signal transmission. The signal receiver 72 continuously receives valid signals and outputs a high-level reset feedback signal, which the controller determines indicates that the reset is complete.

[0048] Based on the above photoelectric transceiver triggering method, the position detection component 7 can be configured as at least one of the following: infrared beam sensor, laser beam sensor, photoelectric isolation detection module, directional photoelectric transceiver component, and point-to-point signal transceiver module.

[0049] Based on the above, an elastic element 25 is provided between the impact head 3 and the power shaft 21; the drive part 23 is in contact with the mating surface. When it rotates, the drive part 23 climbs along the spiral climbing section 241, which can drive the impact head 3 to contract and compress the elastic element 25. When the drive part 23 falls back from the highest point of the spiral climbing section 241 along the axial falling section 242, the elastic element 25 can be reset and drive the impact head 3 to extend out from the mounting port 11.

[0050] In one embodiment, the signal transmitter 71 and signal receiver 72 of the position detection component 7 are respectively positioned at the highest point of the spiral climbing section 241, and the other is located on the drive unit 23 or the impact head 3, moving synchronously with the drive unit 23 or the impact head 3. In this way, the combined motion characteristics of spiral climbing and axial falling of this device can be used to accurately use the highest point of the spiral as the criterion for determining whether the impact head 3 has fully retracted and reset.

[0051] Meanwhile, relying on the trajectory movement of the drive unit 23, the signal is stably triggered and switched. The point of contact is unique, the anti-interference is strong, the structure is compact and it is compatible with rotary drive logic. It can provide timely feedback when the impact head 3 is fully retracted and reset, so as to achieve precise stopping of the drive mechanism, prevent the structure from jamming and the elastic element 25 from long-term fatigue, thereby improving the safety of product use and the overall service life.

[0052] Specifically, please refer to Figure 2 and Figure 7 The power shaft 21 has a first end, which is axially inserted into the impact head 3. The power shaft 21 has an elongated hole 211 extending radially near its first end. The impact head 3 has an insertion hole extending radially at the position corresponding to the elongated hole 211.

[0053] The drive unit 23 includes a pin 231, which passes through the insertion hole and the elongated hole 211. Both ends of the pin 231 protrude from the outer wall of the impact head 3 and can be slidably engaged with the spiral climbing section 241.

[0054] In this embodiment, the first end of the power shaft 21 is axially movably inserted into the impact head 3, forming a bushing-type guide fit. An elongated hole 211 extending axially is formed near the first end of the power shaft 21, and a radially penetrating insertion hole is formed at the corresponding position on the impact head 3. A pin 231 passes through both the insertion hole on the impact head 3 and the axially elongated hole 211 on the power shaft 21. Both ends of the pin 231 protrude outwards from the outer wall of the impact head 3 for sliding engagement with the mating surfaces on the mating part 24.

[0055] The pin 231 passes through both the insertion hole of the impact head 3 and the elongated hole 211 of the power shaft 21, achieving a circumferentially fixed and axially movable connection between the impact head 3 and the power shaft 21. Specifically, when the power shaft 21 rotates, the pin 231 engages with the insertion hole to achieve circumferential limiting, driving the impact head 3 to rotate synchronously. The hole on the power shaft 21 is an axially extending elongated hole 211, within which the pin 231 can slide axially back and forth, allowing the impact head 3 to freely extend and retract relative to the power shaft 21, achieving energy storage and impact action. The two ends of the pin 231 protrude to form sliding contacts, which can directly slide and engage with the spiral climbing section 241, serving both as a transmission mechanism and a cam follower.

[0056] Thus, by setting a pin 231 and a corresponding elongated hole 211 and insertion hole, the circumferential anti-rotation transmission between the power shaft 21 and the impact head 3, the axial sliding guidance of the impact head 3 relative to the power shaft 21, and the cam follower that cooperates with the cam mating surface are realized, thereby realizing the functional reuse of a single part, thereby reducing the number of parts, reducing assembly difficulty, and improving structural reliability.

[0057] The power shaft 21 is inserted into the impact head 3 to form an internal guide support. Combined with the axial positioning of the pin 231 in the elongated hole 211, this ensures that the impact head 3 maintains coaxial and linear motion during extension and retraction, resulting in smoother operation of the safety hammer 100. Simultaneously, the elongated hole 211 limits the axial travel of the impact head 3, ensuring sufficient energy storage compression while preventing excessive extension and retraction, thus ensuring safety and reliability.

[0058] Furthermore, the pin 231 has a through-type structure, with both ends supported on the cam mating surface, resulting in symmetrical force distribution and load dispersion, making it less prone to bending or breakage. Simultaneously, the impact reaction force is evenly transmitted through the pin 231, making it suitable for long-term vehicle standby and frequent impact applications.

[0059] Please continue reading Figure 2 and Figure 5 The position detection component 7 has a signal transmitter 71 and a signal receiver 72, one of which is located on the surface of the pin 231 facing the housing 1, and the other is located on the housing 1, corresponding to the highest point of the spiral climbing section 241. Preferably, one of the signal transmitter 71 and the signal receiver 72 is located on the end surface of the pin 231. In this way, using the pin 231 as the detection linkage carrier, the signal transmitter 71 or the signal receiver 72 can follow the pin 231 along the sliding trajectory of the mating surface. The position detection component 7 will only generate an effective signal feedback when the pin 231 climbs to the highest point of the spiral climbing section 241 and the impact head 3 is fully retracted and reset, thereby making the detection reference accurate and the motion linkage reliable.

[0060] Meanwhile, the arrangement of the signal transmitter 71 and signal receiver 72 reuses the drive component 2, eliminating the need for additional triggering components, resulting in a compact and simple structure. Furthermore, the use of non-contact sensing avoids mechanical friction loss, accurately identifies the reset position, and coordinates with the controller to stop the machine promptly, thereby preventing over-rotation jamming and component fatigue damage, thus improving the operational stability and safety of the safety hammer 100.

[0061] To further improve the smoothness of movement of the two ends of the pin 231 on the mating surface, in one embodiment, please refer to... Figure 4 and Figure 9 The drive assembly 2 also includes a bushing 232, which is located at both ends of the pin 231 and can rotate relative to the pin 231 along its own axis. The pin 231 is slidably connected to the spiral climbing section 241 through the bushing 232.

[0062] In this embodiment, a bushing 232 is fitted at each end of the pin 231; the bushing 232 and the pin 231 are in clearance fit, and the bushing 232 can rotate freely relative to the pin 231 around its own axis; the pin 231 no longer directly contacts the mating surface, but rolls into contact with the mating surface through the external bushing 232; the bushing 232, as a rolling element, moves circumferentially along the spiral climbing section 241 when the impact head 3 rotates, and can also rotate around the pin 231 itself.

[0063] By fitting relatively rotatable bushings 232 at both ends of the pin 231, the pin 231 is rolled into the spiral climbing section 241 through the bushings 232, converting sliding friction into rolling friction. This reduces frictional resistance and wear during transmission, prevents jamming, reduces the load on the motor 22, and improves transmission smoothness and service life. Simultaneously, it ensures stable and reliable energy storage and impact action of the impact head 3, further improving the triggering stability and service life of the emergency window-breaking device.

[0064] Understandably, existing safety hammers, besides having an impact head that cannot automatically reset, also have a very limited striking mode, making them unsuitable for a wide range of applications.

[0065] To improve the applicability of the safety hammer 100, in one embodiment, please refer to... Figure 1 The safety hammer 100 also includes a control operation component 8 for user operation and generates start signals, stop signals, and different mode signals. The controller is electrically connected to the drive component 2, the position detection component 7, and the control operation component 8. When receiving the start signal and the mode signal, the control drive unit 23 drives the impact head 3 to strike in a preset mode.

[0066] In this embodiment, a control operation component 8 is added for user-controlled operation, capable of independently generating start signals, stop signals, and various mode signals. The controller, combining the start signal and mode signal, controls the drive unit 23 to drive the impact head 3 to complete the striking operation in different preset modes. This enables the safety hammer 100 to be manually controllable to start and stop, with adjustable striking modes, making it convenient to operate, highly practical for emergency situations, and adaptable to various window-breaking scenarios.

[0067] Meanwhile, the operating status of the safety hammer 100 can be manually intervened, forming a complete closed-loop control with the position detection and automatic reset structure, thereby avoiding malfunctions and mechanism overload problems, and thus improving the safety of the safety hammer 100, its adaptability to different scenarios, and the overall durability of the machine.

[0068] It should be noted that this invention does not impose specific limitations on the pattern signal. The pattern signal includes at least a single-hit signal and a continuous-hit signal.

[0069] Specifically, the pattern signal includes a single impact signal; the position detection component 7 includes an impact detection unit and a reset detection unit. The impact detection unit is used to generate an impact completion signal when the impact head 3 moves to the extended limit position, and the reset detection unit is used to generate a reset signal.

[0070] The controller receives a start signal and a single-strike signal, and controls the drive unit 23 to drive the impact head 3 to strike in a single-strike mode. After receiving the strike completion signal and the reset signal, the drive unit 23 stops.

[0071] In this embodiment, the mode signal is set to a single-impact signal. In this mode, the controller controls the drive unit 23 to drive the impact head 3 to strike in a single-impact mode. A strike detection unit is provided to generate a strike completion signal when the impact head 3 reaches its extended limit position. After receiving the strike completion signal, the controller controls the drive unit 23 to reset the impact head 3. A reset detection unit is provided to generate a reset signal when the impact head 3 is reset to its original position. Upon receiving the reset signal, the controller stops the drive unit 23.

[0072] It should be noted that the impact detection unit can be set to correspond to either drive component 2 or impact head 3. The reset detection unit can also be set to correspond to either drive component 2 or impact head 3. The setting positions of the impact detection unit and the reset detection unit can be the same or different.

[0073] Based on the aforementioned "position detection component 7 is set to correspond to both drive component 2 and impact head 3", in one embodiment, the reset detection unit is set to correspond to drive component 2, and the impact detection unit can be set to correspond to impact head 3.

[0074] In other words, the reset detection unit includes a signal transmitter 71 and a signal receiver 72, one of which is located in the housing 1 and the other in the drive unit 23. When the drive unit 23 drives the impact head 3 to reset to the position, the two are relative to each other and trigger to generate a reset signal.

[0075] Similarly, the impact detection unit also includes a signal transmitter and a signal receiver, one of which is located in the housing 1 and the other in the impact head 3. When the impact head 3 moves to its extended limit position, the two are relative to each other and trigger to generate an impact completion signal.

[0076] In another scenario, the position detection component 7 only includes a reset detection unit that generates a reset signal. The generation of the impact completion signal does not rely on sensors. The end of the impact action can be determined by the controller's built-in delay timer, based on the preset working duration sequence of the impact action. Alternatively, the completion of the impact action can be determined by collecting the sudden change characteristics of the operating current and torque load of the drive unit 23. The completion of the impact action can also be determined by combining the rotation angle count or the operation feedback signal from the control operation component 8.

[0077] Specifically, the mode signal includes a continuous striking signal; the position detection component 7 includes a reset detection unit for generating a reset signal. The controller receives a start signal and a continuous striking signal, and controls the drive unit 23 to drive the impact head 3 to strike in a continuous striking mode; after receiving a stop signal and a reset signal in succession, the drive unit 23 stops.

[0078] In this embodiment, the mode signal is set to a continuous impact signal. In this mode, the controller controls the drive unit 23 to drive the impact head 3 to strike continuously. During continuous impact, the impact head 3 extends and retracts continuously. Even if the impact head 3 resets and the trigger position detection component 7 sends a reset signal, the controller will not issue a stop command. After completing the impact task, such as glass shattering, the user can operate the control operation component 8 to generate a stop signal. Upon receiving the stop signal, the controller controls the drive unit 23 to reset the impact head 3. When the impact head 3 is fully reset, the controller receives the reset signal and stops the drive unit 23. This design is more suitable for applications requiring continuous impact.

[0079] The present invention does not impose specific restrictions on the form of the control operation component 8.

[0080] In one embodiment, the control operation component 8 includes a mode switching switch and a start / stop switch. The mode switching switch is electrically connected to the controller and is used to selectively generate different mode signals and send them to the controller. The start / stop switch is electrically connected to the controller and is used to generate a start signal or a stop signal and send it to the controller.

[0081] In this embodiment, the control operation component 8 employs independently configured mode switching and start / stop switches. The mode switching switch can selectively output different mode signals, enabling on-demand switching between different striking modes to adapt to various window-breaking operating conditions. The start / stop switch independently generates start and stop signals, allowing for one-button start of striking or emergency stop at any time. The two switches are independently configured, with clear operating logic and reduced risk of accidental activation. Simultaneously, in coordination with the controller, drive component 2, and position detection component 7, it can precisely control the striking action of the impact head 3 and the automatic reset process according to the selected mode, improving ease of use, scenario adaptability, and overall machine reliability.

[0082] In one embodiment, the control operation component 8 includes an integrated gear switch, which has at least four independent adjustment gears to generate at least two mode signals, a start signal and a stop signal respectively, and transmits the corresponding signals to the controller.

[0083] In this embodiment, the control operation component 8 is set as an integrated gear switch with at least four independent adjustment gears, corresponding to the start signal, the stop signal, and outputting at least two modes of signals. For example, the first gear outputs the start signal, the second gear outputs the start signal and a single strike signal, the third gear outputs the start signal and a continuous strike signal, and the fourth gear outputs the stop signal. This eliminates the need for separate switches, resulting in a compact structure for the safety hammer 100, saving installation space, and simplifying wiring and assembly processes.

[0084] Meanwhile, each gear position has an independent function and interlocking feature, making operation centralized and intuitive, and preventing accidental triggering and signal logic conflicts. Working mode selection, strike initiation, and emergency stop can be completed simply by switching gears, making human-machine interaction convenient and reliable; it also facilitates the controller's matching with preset strike modes and automatic reset control logic. This improves the overall reliability, safety, and mass production compatibility of the Safety Hammer 100.

[0085] Based on the structure of the safety hammer 100 described above, the present invention also provides a control method for the safety hammer 100.

[0086] Please see Figure 10 , Figure 10 This is a first flowchart of a control method for a safety hammer 100 provided by the present invention.

[0087] Control methods include: S10: Control the drive component 2 of the safety hammer 100 to strike in a preset mode; S20: Receive a signal indicating completion of the attack or a stop signal; S30: Control drive assembly 2 drives impact head 3 to retract and reset towards mounting port 11; S40: Receive reset signal; S50: Control drive component 2 to stop the impact head 3.

[0088] In this embodiment, the impact head 3 is directly linked by the drive part 23 of the drive component 2, thereby stably driving the impact head 3 to extend and retract to reset.

[0089] Simultaneously, the controller is electrically connected to the drive component 2. Upon completion of the impact task or receipt of a stop signal, the control drive unit 23 drives the impact head 3 to reset. Thus, after the impact is completed, the impact head 3 can actively retract and be stored, preventing prolonged exposure and eliminating safety issues such as scratches, accidental contact, and obstruction of escape, making it safer to use and store. Furthermore, the automatic reset action by the drive unit 23 eliminates the need for manual prying or pressing, making operation simple and responsive in emergency situations.

[0090] Furthermore, the position detection component 7 specifically collects the reset position status of the impact head 3 and generates a feedback signal, which, in conjunction with the controller, achieves closed-loop control to ensure that the impact head 3 is fully retracted and in place, avoiding safety risks caused by incomplete reset. Upon receiving the signal after reset, the controller immediately stops the machine to prevent the drive unit 23 from overtravel, mechanical hardening, or motor overload, thereby reducing component wear and structural jamming failures, and ultimately extending the service life of the safety hammer 100. Through mechanical drive combined with position signal feedback, the striking and reset actions of the electric hammer are standardized, making the safety hammer 100 less prone to jamming or failure during long-term operation, thus improving the overall operational stability of the safety hammer 100.

[0091] The safety hammer 100 also includes a control operation component 8 for generating start signals, stop signals, and different mode signals.

[0092] Please see Figure 11 , Figure 11 A second flowchart of a control method for a safety hammer 100 provided by the present invention. Step S10, which controls the drive component 2 of the safety hammer 100 to strike in a preset mode, includes: S101: Receive start signal; S102: Receive mode signal; S103: According to the type of the mode signal, control the drive component 2 to strike in a preset mode; wherein, if the mode signal is configured as a single strike signal, the preset mode is switched to the single strike mode; if the mode signal is configured as a continuous strike signal, the preset mode is switched to the continuous strike mode.

[0093] In this embodiment, in one scenario, the mode signal is set to a single-hit signal. In this case, the controller controls the drive unit 23 to drive the impact head 3 to perform a single-hit strike. A hit detection unit is provided to generate a hit completion signal when the impact head 3 moves to its extended limit position. After receiving the hit completion signal, the controller controls the drive unit 23 to reset the impact head 3. A reset detection unit is provided to generate a reset signal when the impact head 3 is reset to its position. Upon receiving the reset signal, the controller stops the drive unit 23.

[0094] In another scenario, the mode signal is set to a continuous impact signal. In this case, the controller controls the drive unit 23 to drive the impact head 3 to perform continuous impact. During continuous impact, the impact head 3 extends and retracts continuously. Even if the impact head 3 reset trigger position detection component 7 sends a reset signal, the controller will not perform a reset action. After completing the impact task, such as glass shattering, the user can operate the control operation component 8 to generate a stop signal. After receiving the stop signal, the controller controls the drive unit 23 to reset the impact head 3. When the impact head 3 is reset to its original position, the controller receives the reset signal and controls the drive unit 23 to stop.

[0095] In one embodiment, please refer to Figure 2 and Figure 7 The impact head 3 has a second end 31 located away from the mounting port 11. The second end 31 has a receiving groove 32 in its central area and an annular groove 33 surrounding the receiving groove 32. The first end of the power shaft 21 is axially inserted into the receiving groove 32, and a shoulder 212 is formed around the outer wall of the power shaft 21 at a position away from its first end. One end of the elastic member 25 is housed in the annular groove 33, and the other end abuts against the shoulder 212.

[0096] In this embodiment, the end of the impact head 3 away from the window breaking end is the second end 31, and a two-stage coaxial structure is formed at this end: a receiving groove 32 is opened at the center position for coaxially fitting around the outside of the first end of the power shaft 21; a ring groove 33 is opened around the periphery of the receiving groove 32, which is specifically used to place and position the elastic element 25.

[0097] The first end of the power shaft 21 extends into the receiving groove 32 of the impact head 3, forming an axially sliding and coaxially guided fit; a shoulder 212 is provided on the outer wall of the power shaft 21, which serves as the axial fixed support surface for the elastic element 25. One end of the elastic element 25 is placed in the annular groove 33 of the impact head 3 and is radially constrained by the side wall of the annular groove 33; the other end abuts against the shoulder 212 of the power shaft 21 to achieve axial positioning.

[0098] By providing a central receiving groove 32 and an outer annular groove 33 at the second end 31 of the impact head 3, and a shoulder 212 on the power shaft 21, the end of the power shaft 21 is movably inserted into the receiving groove 32. One end of the elastic element 25 is housed in the annular groove 33, and the other end abuts against the shoulder 212, achieving coaxial internal installation and precise positioning of the elastic element 25. This ensures that the elastic element 25 will not deviate or dislodge during compression and reset, and also provides a stable guide for the power shaft 21 through the receiving groove 32, making the extension and retraction movement of the impact head 3 more coaxial and smooth, thereby improving the operational stability and emergency work reliability of the mechanism.

[0099] Specifically, on the side of the shoulder 212 facing the impact head 3, the outer wall of the power shaft 21 is provided with a retaining rib 213. The retaining rib 213 is connected to the shoulder 212. The outer diameter of the retaining rib 213 is smaller than the outer diameter of the shoulder 212. The elastic element 25 abuts against the end of the shoulder 212 and is provided around the periphery of the retaining rib 213. When the impact head 3 retracts axially, the retaining rib 213 axially limits the second end 31 of the impact head 3.

[0100] By circumferentially mounting a retaining rib 213 on the shoulder 212 of the power shaft 21 towards the impact head 3, forming a stepped surface with the retaining rib 213, the end of the elastic element 25 is circumferentially mounted on the stepped surface formed by the shoulder 212 and the retaining rib 213. This allows the retaining rib 213 to radially center and guide the elastic element 25, preventing it from shifting or bending. Simultaneously, the retaining rib 213 and the outer wall of the power shaft 21 form another stepped surface, enabling axial mechanical restraint of the impact head 3 when it retracts to its limit position. This limits the retraction stroke of the impact head 3 and the compression of the elastic element 25, preventing excessive compression failure of the elastic element 25 and damage to the motor 22, thereby improving the mechanism's operational stability, service life, and reliability in emergency operations.

[0101] In one embodiment, please refer to Figure 4 and Figure 9The impact head 3 is configured as a multi-stage stepped shaft structure, having at least two shaft segments 34 with different outer diameters. In the direction toward the outside of the housing 1, the outer diameter of the shaft segment 34 gradually decreases and forms a stepped surface 35.

[0102] The mating part 24 is spaced around the outer periphery of the small outer diameter shaft section 34, and the end of the mating part 24 away from the mounting port is provided with a mating surface located on the radial outer side; the driving part 23 is provided on the large outer diameter shaft section 34 and is in transmission engagement with the spiral climbing section.

[0103] In this embodiment, the impact head 3 is a multi-stage stepped shaft, comprising at least two shaft segments 34 with different outer diameters: a segment near the inside of the housing 1 is a large-diameter shaft segment 34; a segment near the outside of the housing 1, used for breaking windows, is a small-diameter shaft segment 34; along the direction towards the outside of the housing 1, the outer diameter of the shaft segments 34 gradually decreases, and a stepped surface 35 is formed between adjacent shaft segments 34. The mating parts 24 are spaced around the periphery of the small-diameter shaft segments 34. The aforementioned mating surfaces (the aforementioned spiral climbing section and axial falling section) are provided radially outward of the end of the mating part 24 away from the mounting opening. The driving part 23 is disposed on the large-diameter shaft segment 34 of the impact head 3, corresponding to the position of the mating surface on the mating part 24, to achieve the aforementioned sliding and / or rolling engagement, thereby realizing the transmission engagement between the driving part 23 and the spiral climbing section 241.

[0104] By configuring the impact head 3 as a multi-stage stepped shaft structure, the outer diameter of the shaft segment 34 gradually decreases towards the outer side of the housing 1, forming a stepped surface 35. The mating parts 24 are spaced around the outer periphery of the smaller outer diameter shaft segment 34, and a mating surface is formed on the end face of the mating part 24 facing away from the mounting port 11. Simultaneously, the drive unit 23 is located on the larger outer diameter shaft segment 34 and mates with the spiral climbing section 241. This results in a reasonable and compact structural layout, simplifying the overall assembly structure. Furthermore, the stepped shape of the impact head 3 enhances the window-breaking effect and structural strength, further improving the structural reliability and ease of assembly of the safety hammer 100.

[0105] In one embodiment, please refer to Figure 2 , Figure 3 , Figure 7 and Figure 8 The safety hammer 100 also includes an annular shell 4 surrounding the inner wall of the housing 1. The annular shell 4 is spaced around the periphery of the power shaft 21, and the inner diameter of the annular shell 4 is larger than the outer diameter of the impact head 3.

[0106] The power shaft 21 has a first end connected to the impact head 3. A shoulder 212 is formed around the outer wall of the power shaft 21 at a position away from the first end. An annular rib 41 protrudes from the inner wall of the annular shell 4. The annular rib 41 is located on the side of the shoulder 212 away from the impact head 3, and a bearing chamber 42 is formed between the two. The safety hammer 100 also includes a bearing 5, which is sleeved around the power shaft 21 and located in the bearing chamber 42. An elastic element 25 is located between the impact head 3 and the shoulder 212.

[0107] In this embodiment, the annular shell 4 is arranged around the inner wall of the housing 1 and fixed to the inner wall of the housing 1; the annular shell 4 is spaced around the power shaft 21 and does not directly contact the power shaft 21; the inner diameter of the annular shell 4 is larger than the outer diameter of the impact head 3, so as to reserve enough space for the extension and retraction of the impact head 3 and not interfere with the reciprocating motion of the impact head 3.

[0108] The power shaft 21 is provided with a shoulder 212; the inner wall of the annular shell 4 protrudes inward with an annular rib 41; the annular rib 41 is located on the side of the shoulder 212 away from the impact head 3; the annular space between the end face of the shoulder 212 and the end face of the annular rib 41 together forms the bearing chamber 42. The outer ring of the bearing 5 is radially positioned by the inner wall of the annular shell 4, and axially held by the annular rib 41 and the shoulder 212; the inner ring of the bearing 5 cooperates with the power shaft 21 to form a stable rotational support for the power shaft 21.

[0109] An annular shell 4 is provided on the inner wall of the housing 1, and an independent bearing chamber 42 is formed by the cooperation of the shoulder 212 on the power shaft 21 and the annular rib 41 on the inner wall of the annular shell 4. The bearing 5 is placed in the bearing chamber 42 to provide rotational support for the power shaft 21. At the same time, the elastic element 25 is arranged between the impact head 3 and the shoulder 212 to achieve partitioned arrangement and isolation protection between the bearing 5 and the elastic element 25. In this way, the smoothness and coaxiality of the rotation of the power shaft 21 can be improved by the bearing 5, and the load on the motor 22 can be reduced. At the same time, the independent bearing chamber 42 can prevent the intrusion of impurities, thereby improving the reliability and service life of the bearing 5.

[0110] Meanwhile, the annular shell 4 can provide external constraint protection for the impact head 3. The overall structure is compact and reasonable, with balanced force and high assembly precision, which further improves the overall structural stability and emergency work reliability of the safety hammer 100.

[0111] Please see Figure 2 and Figure 3 The drive assembly 2 also includes a motor 22, which includes a motor body 221 and a motor shaft 222 disposed on the motor body 221 and rotatable along its own axis. The motor shaft 222 is connected to the power shaft 21 for transmission.

[0112] One end of the annular shell 4 extends axially to the motor body 221. The safety hammer 100 also includes a protrusion 61 and a stop groove 62 that are inserted into each other. One of the protrusion 61 and the stop groove 62 is provided on the annular shell 4, and the other is correspondingly provided on the motor body 221.

[0113] In this embodiment, the drive assembly 2 includes a motor 22, which consists of a motor body 221 and a self-rotating motor shaft 222. The motor shaft 222 is connected to the power shaft 21 for transmission, thereby transmitting the rotational power of the motor 22 to the power shaft 21. One end of the annular shell 4 extends axially to the position of the motor body 221, so that the annular shell 4 covers and connects to the motor 22 mounting area from the impact head 3 area, forming a long-stroke internal support shell.

[0114] At the mating position between the annular shell 4 and the motor body 221, a protrusion 61 and a stop groove 62 are provided for mutual insertion and engagement. The protrusion 61 inserts into the stop groove 62 to achieve rapid circumferential and axial positioning. During assembly, the end of the annular shell 4 is aligned with the motor body 221, allowing the protrusion 61 to directly engage with the stop groove 62. After insertion and engagement, the annular shell 4 and the motor body 221 cannot rotate relative to each other circumferentially, and axial positioning is accurate. The motor shaft 222 and the power shaft 21 remain coaxial, ensuring stable power transmission during motor rotation. The annular shell 4 provides continuous and stable internal support for the internal bearing 5, the power shaft 21, and the impact head 3.

[0115] By extending one end of the annular shell 4 axially to the motor body 221, and providing a protrusion 61 and a stop groove 62 for interlocking between the annular shell 4 and the motor body 221, rapid positioning and assembly between the motor 22 and the annular shell 4 are achieved. This ensures the coaxiality of the motor shaft 222, the power shaft 21, and the impact head 3, improving the smoothness of power transmission and the stability of the mechanism. It also provides circumferential anti-rotation and axial limiting between the annular shell 4 and the motor body 221, preventing relative rotation and loosening. Simultaneously, it forms a continuous internal rigid support structure, improving the overall structural strength.

[0116] In one embodiment, the annular shell 4 has a first end face 43 facing the impact head 3; when the drive part 23 is at the highest point of the spiral climbing section 241, the drive part 23 and the first end face 43 are spaced apart in the axial direction.

[0117] By axially spacing the annular shell 4 facing the first end face 43 of the impact head 3 with the drive unit 23 located at the highest point of the spiral climbing section 241, the drive unit 23 and the annular shell 4 do not contact each other or interfere axially when the impact head 3 retracts to its designed limit position for energy storage. This ensures that the energy storage process of the elastic element 25 and the impact kinetic energy output are completely controlled by the cam trajectory, avoiding friction, wear, and motor 22 stalling under normal operating conditions. Simultaneously, in the event of an abnormal condition where the impact head 3 retracts excessively, the first end face 43 of the annular shell 4 can axially limit and stop the drive unit 23, preventing excessive compression and damage to internal components. This improves overall structural safety and emergency reliability while ensuring smooth mechanism movement.

[0118] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A safety hammer, characterized in that, include: The housing contains an impact head that is movably mounted therein, and has a mounting port on it for the impact head to extend and retract. The driving assembly includes a movable driving part, which is drivenly connected to the impact head to drive the impact head to extend from the mounting port to strike or retract and reset. A position detection component is used to generate a reset signal at least when the impact head is reset to the position. The controller is electrically connected to the drive assembly and the position detection assembly. When the striking task is completed or a stop signal is received, the controller controls the drive unit to drive the impact head to reset. When the reset signal is received, the controller controls the drive unit to stop.

2. The safety hammer according to claim 1, characterized in that, The position detection component is provided corresponding to the drive component and / or the impact head.

3. The safety hammer according to claim 1, characterized in that, The position detection component includes a signal transmitter and a signal receiver, one of which is located in the housing and the other in the drive unit or the impact head. When the drive unit drives the impact head to reset to its position, the two components are opposite each other and trigger each other to generate the reset signal.

4. The safety hammer according to claim 1, characterized in that, The drive assembly also includes a power shaft and a mating part. The power shaft is located inside the housing and can rotate along its own axis. The impact head is circumferentially fixed and axially movable in a mating connection with the power shaft. The driving part is disposed on the impact head and cooperates with the mating part, so that when the driving part rotates with the impact head, under the action of the mating part, it can drive the impact head to extend axially from the mounting port to strike or retract and reset.

5. The safety hammer according to claim 4, characterized in that, The mating part is fixed relative to the housing and forms a mating surface, the mating surface including a spiral climbing section and an axial falling section continuously arranged in the circumferential direction; An elastic element is provided between the impact head and the power shaft; the driving part is in contact with the mating surface. When it rotates, the driving part climbs along the spiral climbing section, which can drive the impact head to contract and compress the elastic element. When the driving part falls back from the highest point of the spiral climbing section along the axial falling section, the elastic element can be reset and drive the impact head to extend out from the mounting port. The position detection component includes a signal transmitter and a signal receiver, one of which is located at the highest point of the spiral climbing section, and the other is located at the drive unit or the impact head.

6. The safety hammer according to claim 5, characterized in that, The end of the power shaft is axially inserted into the impact head, and the power shaft has an elongated hole extending radially near the end. The impact head has a radially inserted hole at a position corresponding to the elongated hole. The drive unit includes a pin that passes through the inserted hole and the elongated hole. Both ends of the pin protrude from the outer wall of the impact head and can slide with the spiral climbing section. The position detection component has a signal transmitter and a signal receiver, one of which is located on the surface of the pin facing the housing, and the other is located on the housing and is positioned at the highest point of the spiral climbing section.

7. The safety hammer according to claim 1, characterized in that, The safety hammer also includes a control operation component for user operation, and generates start signals, stop signals and different mode signals; The controller is electrically connected to the drive component, the position detection component, and the control operation component. When it receives the start signal and the mode signal, it controls the drive unit to drive the impact head to strike in a preset mode.

8. The safety hammer according to claim 7, characterized in that, The control operation component includes: A mode switching switch, electrically connected to the controller, is used to selectively generate different mode signals and transmit them to the controller; and, A start / stop switch is electrically connected to the controller to generate the start signal or the stop signal and send it to the controller.

9. The safety hammer according to claim 7, characterized in that, The control operation component includes an integrated gear switch, which has at least four independent adjustment gears to generate the start signal, the stop signal, and at least two mode signals respectively, and transmits the corresponding signals to the controller.

10. The safety hammer according to claim 8 or 9, characterized in that, The mode signal includes at least a single-hit signal and a continuous-hit signal.

11. A control method for a safety hammer based on any one of claims 1 to 10, characterized in that, The control method includes: The drive assembly of the safety hammer is controlled to strike in a preset mode; Receive a signal indicating completion of the attack or a shutdown signal; The drive assembly is controlled to cause the impact head to retract and reset towards the mounting port; Receive reset signal; The drive assembly is controlled to stop the impact head.

12. The control method for a safety hammer according to claim 11, characterized in that, The safety hammer also includes a control operation component for generating a start signal, a stop signal, and different mode signals; The step of controlling the drive assembly of the safety hammer to strike in a preset mode includes: Receive the start signal; Receive the mode signal; According to the type of the mode signal, the drive component is controlled to strike in a preset mode; wherein, if the mode signal is configured as a single strike signal, the preset mode is switched to the single strike mode; if the mode signal is configured as a continuous strike signal, the preset mode is switched to the continuous strike mode.

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