Portable laser marking hand tool with multiple safety protections

Abstract

The utility model discloses a portable laser marking hand tool with multiple safety protections.The portable laser marking hand tool comprises a marking main body and a handheld main body, a switch button of the handheld main body is provided with a trigger switch protection device, and a distance measuring module facing a marked object is further installed in a light outlet of the marking main body; when the distance between the distance measuring module and the marking object is changed, an alarm is triggered and marking is stopped, a laser work indicating device is arranged on the hand tool, and transparent laser protective glass corresponding to the wavelength of working laser is arranged on the light emitting side face of the marking body. Contact type switch protection devices are further symmetrically arranged on the edge of the light-emitting face of the marking body, the light-emitting side face of the marking body is provided with side exhaust turbofans with the wind direction facing outwards, and the side exhaust direction is the light-emitting direction. The portable laser marking hand tool solves the problem that in the prior art, a portable laser marking hand tool is poor in safety protection; the beneficial effect of comprehensively improving the safety protection reliability of each scene is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of laser marking tools, and in particular to a portable laser marking tool with multiple safety protections. Background Art

[0002] Currently, there is a lack of portable laser marking devices with multiple safety features on the market. Most safety features are built into portable laser marking equipment, but products with only one safety feature are often too bulky and heavy to qualify as portable laser marking devices. They also fail to meet the safety requirements of various national standards. For example, a laser device used for marking utility poles, published in application number CN117182325A, is prone to inadvertent triggering due to accidental triggering of the push button during abnormal operation, and lacks a mechanism to prevent laser leakage and eye damage. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the present application provides a portable laser marking tool with multiple safety protections to solve the problem of poor safety protection of the portable laser marking tool in the above-mentioned prior art.

[0004] To achieve the above objectives, this application is implemented through the following technical solutions:

[0005] A portable laser marking tool with multiple safety protections includes a marking body and a handheld body at the rear of the marking body. The rear of the handheld body is provided with an external line card, and the finger portion of the handheld body is provided with a switch button. The edge of the light-emitting surface of the marking body is also symmetrically provided with a contact switch protection device. The contact switch protection device triggers an alarm and stops light emission when the edge of the light-emitting surface of the marking body is lifted off the marking plane. A distance measuring module facing the marking object is also installed in the light outlet of the marking body. When the distance between the distance measuring module and the marking object changes, an alarm is triggered and marking stops.

[0006] Preferably, the ranging module uses a photon time-of-flight ranging sensor.

[0007] Preferably, the marking body further includes a focus plate, and the focus plate is fixed on the inner side of the opening edge of the marking body.

[0008] Preferably, the contact switch protection device includes a microswitch module and a microswitch module fixing cover. The microswitch module is directly installed on the bottom of the fixed focus plate and its microswitch faces the microswitch module fixing cover. A protrusion is provided on the outer side of the microswitch module fixing cover protruding from the edge surface of the light-emitting surface of the marking body.

[0009] Preferably, the switch button is provided with a trigger switch protection device so that the switch button cannot be touched in abnormal use.

[0010] Preferably, the trigger switch protection device uses a flip cover assembly, which includes a flip cover seat and a flip cover. The flip cover seat is fixed around the switch button, and the flip cover rotates around one side of the flip cover seat. When opened, the switch button is exposed, and when closed, the switch button is enclosed. The flip cover assembly is provided with dead points in both the open and closed positions.

[0011] Preferably, the hand tool is provided with a laser working indication device.

[0012] Preferably, the laser working indicator device is a laser working indicator light which is set at a position facing the operator when the hand tool is working and lights up when working.

[0013] Preferably, a transparent laser protection glass corresponding to the working laser wavelength is provided on the light-emitting side surface of the marking body.

[0014] Preferably, a fan with outward wind direction is provided on the light-emitting side surface of the marking body, and the fan is a side-discharge turbofan.

[0015] Preferably, the side discharge direction of the side discharge turbofan is the light emitting direction.

[0016] Compared with the existing technology, the beneficial effects of this solution are as follows: This application has made targeted optimizations to the existing safety technology, specifically using time-of-flight sensor protection, trigger switch protection device, contact switch protection and ring-shaped working indicator light, which further improves safety and ensures the safety of operators and surrounding relevant personnel. Protective glass is added to the observation window, and the protection level reaches the OD6+ standard, which can not only effectively protect the eyes from laser radiation, but also allow operators to observe the marking work, greatly improving safety performance. A side suction exhaust fan is added on the side to prevent the laser from overflowing from the fan, increasing safety. At the same time, the side exhaust direction is the light output direction, which can effectively prevent the dust accumulation inside the fixed focus bracket from affecting the marking effect during long-term marking, and can facilitate and effectively clean the surface of the object to be marked. All of the above functions adopt a modular design, which is not only convenient for production and assembly, but also convenient for maintenance operations, and can also be appropriately configured for different safety requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an embodiment of the present application when assembled;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of a light-emitting module with the light-emitting port hidden from view according to an embodiment of the present application;

[0019] Figure 3 This is a structural diagram facing the light outlet of an embodiment of the present application;

[0020] Figure 4This is a schematic diagram of the three-dimensional structure of a contact switch protection device according to an embodiment of the present application;

[0021] Figure 5 This is a three-dimensional schematic diagram of a trigger switch protection device in an embodiment of the present application when it is opened;

[0022] Figure 6 This is a three-dimensional cross-sectional schematic diagram of a fan installation according to an embodiment of the present application;

[0023] Among them, 1- marking body, 101- focusing field lens, 102- fixed focus plate, 2- handheld body, 3- external output line card, 5- laser working indicator light, 6- protective glass, 7- trigger switch protection device, 71- flip cover assembly, 8- contact switch protection device, 81- micro switch module, 9- photon time-of-flight ranging sensor, 11- fan, 13- switch button. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] This embodiment provides a technical solution: This solution discloses a portable laser marking handpiece with multiple safety protections, including a marking body 1 and a handheld body 2 at the tail thereof, wherein the tail of the handheld body 2 is provided with an external line card 3, and the finger portion of the hand-held body 2 is provided with a switch button 13, and the switch button 13 is provided with a trigger switch protection device 7 so that the switch button 13 cannot be touched under abnormal use conditions. When the handpiece is working, a laser working indicator device is provided, and the light-emitting side surface of the marking body 1 is provided with a transparent laser protection glass 6 corresponding to the working laser wavelength. The edge of the light-emitting surface of the marking body 1 is also symmetrically provided with a contact switch protection device 8, and the contact switch protection device 8 triggers an alarm and stops emitting light when the edge of the light-emitting surface of the marking body 1 is lifted off the marking plane. The marking body 1 also includes a fixed focus plate 102, and the fixed focus plate 102 is fixed on the inner side of the opening edge of the marking body 1.

[0026] The laser operation indicator device is a laser operating indicator light 5, positioned facing the operator when the handpiece is operating. When the laser is operating, the laser operating indicator light 5 illuminates, alerting the operator that the laser is emitting light, preventing dangerous operations and enhancing operational safety. In this embodiment, the laser operating indicator light 5 is located on the back of the marking body 1 and is annular in shape, providing both a reminder and aesthetic appeal. The laser operation indicator device can also be replaced with an audible prompt device that emits a specific sound to alert the operator when the laser is operating. This audible prompt can be more effective, especially in visually restricted environments.

[0027] The trigger switch protection device 7 utilizes a protective flip cover assembly 71, which comprises a flip cover seat and a flip cover. The flip cover seat is fixed around the switch button 13, and the flip cover rotates around one side of the flip cover seat, exposing the switch button 13 when opened and enclosing it when closed. The flip cover only opens during operation and closes when not in operation, preventing inadvertent triggering caused by accidental touches under abnormal circumstances and reducing the risk of accidents. In this embodiment, the flip cover assembly 71 has dead points in both the open and closed positions, effectively ensuring stability in both the protective and operational positions. The trigger switch protection device 7 can also utilize other protective devices, such as a sliding cover assembly, to achieve the same protective purpose.

[0028] The light-emitting side of the marking body 1 is equipped with laser shielding glass 6 corresponding to the operating laser wavelength. In this embodiment, the laser shielding glass 6 has an optical density protection level of OD6+, effectively reducing damage to the human eye in the 190-550nm and 800-1100nm wavelength bands. Furthermore, when previewing a mark using 650nm red light, the marking position is clearly displayed, improving operational safety and convenience. The specific protection level and function of the laser shielding glass 6 make it uniquely valuable for protecting the human eye while not affecting the preview of the mark.

[0029] A distance measuring module facing the marking object is also installed in the light outlet of the marking body 1. The distance measuring module uses a laser distance measuring module composed of a photon time-of-flight distance measuring sensor 9. This module can measure distance in real time. When the marking tool is tilted or slightly lifted, the distance changes, and an alarm is triggered and the marking laser output is stopped. It can also prevent harmful lasers from leaking from the gap between the fixed focus plate and the marking plane to protect human eyes. The photon time-of-flight distance measuring sensor 9 can also be replaced by an ultrasonic sensor for distance measurement protection, which triggers an alarm and stops the marking operation by detecting distance changes. Ultrasonic sensors may have better stability and anti-interference capabilities in some environments.

[0030] In this embodiment, since the light outlet is square, a contact switch protection device 8 is provided at each diagonal corner. The contact switch protection device 8 includes a micro switch module 81 and a micro module fixing cover 82. The micro switch module 81 is directly mounted on the bottom of the fixed focus plate 102 and its micro switch faces the micro module fixing cover 82. The outer side of the micro module fixing cover 82 is provided with a protrusion protruding from the edge surface of the light emitting surface of the marking body 1. When not in operation, the micro switch is normally open. When working, the hand tool is placed on the marking plane, and the micro switch is pressed when the marking plane is pressed, and normal marking and other operations can be performed at this time. If any corner of the hand tool is lifted during the marking process, the micro switch will trigger an alarm and stop marking, that is, stop emitting light, to prevent harmful laser light from leaking from the gap between the fixed focus plate 102 and the marking plane, protecting human eyes from harm. When the light outlet is circular, the contact switch protection device 8 can also be arranged evenly and symmetrically. Alternatively, the contact switch protection device 8 can use a pressure sensor instead of the microswitch module 81. When the handpiece is placed on the marking surface, the pressure sensor senses the pressure change and triggers the marking operation. If the pressure change is abnormal, such as when the handpiece is lifted, the pressure sensor immediately sends a signal to stop marking.

[0031] In order to ensure a better marking effect, the light-emitting side of the marking body 1 is also provided with a fan 11 with an outward wind direction. The fan 11 is a side-discharge turbofan with the side discharge port facing the light-emitting surface. The fan can also be set to be delayed and turned off when the light is finished. During marking, the fan 11 starts working, and the exhaust gas or dust generated by marking in the fixed focus frame 411 space can be discharged in time, and the light-emitting device is cooled. At the same time, it prevents the laser from overflowing from the gap of the fan and avoids blowing the exhaust gas and dust towards the user, thereby enhancing the protection of the user, avoiding adverse effects on the marking effect, and ensuring the stability of the marking quality. It is especially suitable for long-term marking scenarios and can also conveniently and effectively remove dust generated on the surface of the object to be marked. In addition to using the fan 11, a built-in micro vacuum cleaner can be used to replace the side-discharge turbofan to directly suck the exhaust gas and dust generated by marking into the dust collection bag to avoid the influence of dust on the marking effect. For the heat dissipation of the light-emitting device, a fixed focus frame structure with a heat sink and ventilation holes can also be used to dissipate heat through natural convection, reducing dependence on the fan 11.

[0032] The various functions of the portable laser marking handpiece of this application adopt a modular design, which facilitates production, assembly, and maintenance operations. At the same time, it can be appropriately configured according to different safety requirements, improving the flexibility and adaptability of the product. The comprehensive use of the photon time-of-flight ranging sensor 9 protection, the trigger switch protection device 7, the contact switch protection module 8, and the ring laser working indicator light 5 greatly improves safety. The unique design combination of these safety protection mechanisms and the coordinated operation of various safety modules effectively reduce the safety risks during the use of the laser marking handpiece and improve its reliability and effectiveness in protecting human eyes in different scenarios.

[0033] In the description of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] The above is only a preferred specific implementation method of this solution, but the scope of protection required by this solution is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solution and inventive concept of this application within the technical scope disclosed in this application, and they should be covered by the scope of protection of this application.

Claims

1. A portable laser marking hand tool with multiple safety protections, comprising a marking body (1) and a handheld body (2) at the rear thereof, wherein the rear of the handheld body (2) is provided with an external outlet line card (3), and a finger portion of the hand holding the handheld body (2) is provided with a switch button (13), characterized in that: A contact switch protection device (8) is symmetrically provided on the edge of the light-emitting surface of the marking body (1). When the edge of the light-emitting surface of the marking body (1) is lifted off the marking plane, the contact switch protection device (8) triggers an alarm and stops emitting light. A distance measuring module facing the marking object is also installed in the light outlet of the marking body (1). When the distance between the distance measuring module and the marking object changes, an alarm is triggered and marking is stopped.

2. The portable laser marking tool with multiple safety protections according to claim 1 is characterized by: The distance measurement module uses a photon time-of-flight distance measurement sensor (9).

3. The portable laser marking tool with multiple safety protections according to claim 1 is characterized in that: The marking body (1) further comprises a focus plate (102), wherein the focus plate (102) is fixed on the inner side of the opening edge of the marking body (1).

4. The portable laser marking tool with multiple safety protections according to claim 3 is characterized by: The contact switch protection device (8) comprises a micro switch module (81) and a micro module fixing cover (82), wherein the micro switch module (81) is directly mounted on the bottom of the fixed focus plate (102) and its micro switch faces the micro module fixing cover (82), and a protrusion is provided on the outer side of the micro module fixing cover (82) protruding from the edge surface of the light emitting surface of the marking body (1).

5. The portable laser marking tool with multiple safety protections according to claim 1 is characterized in that: The switch button (13) is provided with a trigger switch protection device (7) so that the switch button (13) cannot be touched in an abnormal use state.

6. The portable laser marking tool with multiple safety protections according to claim 5, characterized in that: The trigger switch protection device (7) uses a flip cover assembly (71), which includes a flip cover seat and a flip cover. The flip cover seat is fixed around the switch button (13), and the flip cover rotates around one side of the flip cover seat. When opened, the switch button (13) is exposed, and when closed, the switch button (13) is enclosed. The flip cover assembly (71) is provided with dead points in both the open and closed positions.

7. The portable laser marking tool with multiple safety protections according to claim 1 is characterized in that: The hand tool is provided with a laser working indicating device.

8. The portable laser marking tool with multiple safety protections according to claim 7, characterized in that: The laser working indicator device is a laser working indicator light (5) which is set at a position facing the operator when the hand tool is working and lights up when working.

9. The portable laser marking tool with multiple safety protections according to claim 1, characterized in that: A transparent laser protection glass (6) corresponding to the wavelength of the working laser is provided on the light-emitting side surface of the marking body (1).

10. The portable laser marking tool with multiple safety protections according to claim 1, characterized in that: A fan (11) with an outward wind direction is provided on the light-emitting side surface of the marking body (1), and the fan (11) is a side-discharge turbofan.

11. The portable laser marking tool with multiple safety protections according to claim 10, characterized in that: The side discharge direction of the side discharge turbofan is the light emitting direction.

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