Pen lamp with compact structure

Abstract

The utility model provides a pen lamp with a compact structure, and relates to the technical field of lighting lamps. Comprising a shell and a light source assembly arranged on the shell, and the light source assembly comprises a light-emitting light source module, a laser light source module and a reflection cup arranged on the light path of the light-emitting light source module and the laser light source module. The reflection cup is provided with a through hole which is opposite to a light path of the laser light source module and is used for emitting laser. According to the scheme, the size of the pen lamp with the laser function is reduced.

Description

Technical Field

[0001] This utility model relates to the field of lighting fixtures, and more specifically, to a compact pen lamp. Background Technology

[0002] Pen-shaped flashlights are small, portable lighting tools. Their portability, small size, and ease of operation make them widely used in construction sites, professional repair work such as car repair, and other applications. Laser lights, on the other hand, have excellent directionality, making them ideal for educational and business demonstrations, visual presentations, and explanations. They can easily and accurately point out targets. In professional repair settings, they can effectively indicate distant targets and locate unusual objects.

[0003] Existing pen lights with laser illumination typically have the white light emission module and the laser emission module placed at opposite ends of the pen light. When using different light effects, the direction of the light fixture needs to be changed. If the white light emission module and the laser emission module are placed side by side, the overall diameter of the pen light will increase due to the need to install lenses and other optical components separately, making it large and difficult to carry. Utility Model Content

[0004] This utility model discloses a compact pen lamp, which aims to solve the problems mentioned above.

[0005] The present invention adopts the following solution:

[0006] A compact pen lamp includes a housing and a light source assembly disposed on the housing. The light source assembly includes a light-emitting light source module, a laser light source module, and a reflector disposed on the light path of the light-emitting light source module and the laser light source module. The reflector is provided with a through hole opposite to the light path of the laser light source module for laser emission.

[0007] Furthermore, the light source module is disposed on the central axis of the reflector cup, the laser light source module is located beside the light source module, and the through hole is disposed on the side wall of the reflector cup and is opposite to the light path of the laser light source module.

[0008] Furthermore, the conical portion of the reflector cup covers the light-emitting light source module to shape and focus the light generated by the light-emitting light source module; a lens is provided at the end of the reflector cup away from the light source.

[0009] Furthermore, the lens is made of an optically transparent material.

[0010] Furthermore, the reflector cup is dome-shaped with openings at both ends, and the opening near the top of the dome is disposed on the light source module. The inner wall of the reflector cup gradually concaves from the top of the dome to the bottom to form a concave reflective surface or a convex reflective surface.

[0011] Furthermore, the reflector is made of metal to dissipate the heat generated during the operation of the light source assembly.

[0012] Furthermore, the light source module and the laser source module are connected to a circuit board, and the circuit board is provided with a switching assembly to control the opening and closing of the light source module and the laser source module.

[0013] Furthermore, the end of the housing is provided with an internal thread, and the outer side of the reflector is provided with an external thread for threaded connection to the housing; and the outer side of the reflector is provided with a pressure cap for mounting the lens at the end of the reflector; a waterproof sealing ring is provided between the pressure cap and the lens.

[0014] Beneficial effects:

[0015] This solution provides laser emission by setting a through hole on the reflector cup that is opposite to the light path of the laser light source module. By integrating the light source module and the laser light source module into the same reflector cup structure and using the through hole to achieve laser emission, it has the advantages of compact structure, easy portability and use, and no need to frequently change the direction of the lamp. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural schematic diagram of a compact pen lamp according to an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the external structure of a compact pen lamp according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the reflector of a compact pen lamp according to an embodiment of the present invention;

[0019] Reference numerals: 1. Housing; 2. Light source module; 3. Laser source module; 4. Reflector; 41. Through hole; 5. Lens; 6. Circuit board; 7. Switch assembly; 8. Pressure cover; 9. Waterproof sealing ring. Detailed Implementation

[0020] Combination Figures 1 to 3As shown, this embodiment provides a compact pen lamp, including a housing 1 and a light source assembly. The light source assembly includes a light-emitting light source module 2, a laser light source module 3, and a reflector 4. The reflector 4 is positioned in the light path of the two light sources, and its surface has a through hole 41 corresponding to the laser light source module 3, allowing the laser beam to pass through directly. At the same time, the reflector 4 controls the reflection of the light generated by the light-emitting light source module 2.

[0021] The reflector cup 4 refers to a cup-shaped optical element with a curved reflective structure. It can be made of metal material using precision stamping or spinning processes, and its inner wall is polished to form a smooth reflective surface, used to reflect and shape the scattered light generated by the light source module 2. The through-hole 41 refers to an opening structure penetrating the wall of the reflector cup 4, which can be achieved through laser cutting or punching processes. Its position is precisely aligned with the optical axis of the laser source module 3 to ensure unobstructed passage of the laser beam. The light source module 2 refers to the light-emitting unit that generates floodlight illumination. It can be constructed using surface-mount LED chips and a substrate, which can be an aluminum substrate to enhance heat dissipation. The laser source module 3 refers to a semiconductor device that generates a directional laser beam, specifically including a laser diode, a collimating lens 5, and a mounting bracket. The collimating lens 5 is used to adjust the laser beam into parallel light output.

[0022] In this embodiment, the light emitted by the light source module 2 is reflected by the inner wall of the reflector cup 4 to form a focused beam, while the parallel laser beam generated by the laser source module 3 passes directly through the through-hole 41 of the reflector cup 4 for output. The optical paths of the two light sources are spatially reused at the reflector cup 4, eliminating the need for a separate light guide channel or lens 5 assembly for the laser source. The reflector cup 4 serves both as a white light reflection and focusing function and as a path for the laser beam to penetrate through the through-hole 41. This dual-function design allows the two light sources to share a single optical system. The through-hole 41 design of the reflector cup 4 allows the laser beam to penetrate directly without additional light guide structures, integrating the optical paths of the two light sources within a single reflector cup 4, significantly reducing lateral space occupation. This structure breaks through the traditional understanding that optical components must be completely isolated, creatively utilizing the through-hole 41 to achieve optical path separation. It achieves dual-mode illumination while maintaining portability. The collaborative design of the reflector cup 4 and the through-hole 41 eliminates the optical redundancy of the traditional side-by-side layout, allowing the operator to quickly switch light source modes without adjusting the grip direction, meeting the needs of one-handed operation in maintenance and inspection scenarios.

[0023] In this embodiment, the light source module 2 is positioned on the central axis of the reflector cup 4, and the laser light source module 3 is located beside the light source module 2. The central axis refers to the geometric symmetry axis of the reflector cup 4. This arrangement allows the light generated by the light source module 2 to be uniformly reflected along the symmetrical direction of the reflector cup 4, thereby improving light efficiency. The "side" refers to the outer region of the light source module 2, which is spaced from the inner wall of the reflector cup 4. This layout ensures that the light path of the laser light source does not interfere with the light path of the light source module 2, while sharing the same reflector cup 4 for optical path integration. When the light source module 2 is fixed on the axial position of the reflector cup 4, the light emitted by it is reflected by the conical inner wall of the reflector cup 4 to form a focused beam. The laser light source module 3 is positioned to the side of the light source module 2, and its laser beam is projected outwards through the through-hole 41 in the side wall of the reflector cup 4. By integrating the mounting positions of the two light sources into the same reflector cup 4 structure, the need for separate lens 5 or reflector is avoided, thereby reducing the axial space occupation; while maintaining the single-end light emission characteristic of the pen lamp, there is no need to increase the radial dimension, solving the volume expansion problem caused by the integration of multiple light sources; at the same time, it realizes the simultaneous use of white light illumination and laser indication functions, and users can operate the two light sources at the same time without switching the holding direction, and the compact arrangement of the light path is achieved inside the narrow pen-shaped housing 1, avoiding the increase in structural complexity caused by adding independent optical components.

[0024] In this embodiment, the conical portion of the reflector cup 4 covers the light source module 2 to shape and focus the light generated by the light source module 2; a lens 5 is provided at the end of the reflector cup 4 away from the light source; the lens 5 is made of an optically transparent material, such as glass, polycarbonate, polystyrene, PMMA, acrylic acid, styrene acryloyl nitride, or other suitable transparent plastics, glass or optical materials.

[0025] The conical portion covering the light source module 2 refers to the reflector cup 4 being constructed with a conical structure surrounding the light source module 2. This can be achieved using parabolic or hyperboloid geometry, adjusting the light propagation direction through the reflection path to shape the light beam. The lens 5 being positioned at the far end of the reflector cup 4 means that the light-transmitting element is installed at the open end of the reflector cup 4 opposite to the light source. Adjusting the radius of curvature controls the light refraction angle to achieve focusing or diverging functions.

[0026] In another embodiment, the reflector cup 4 is dome-shaped with openings at both ends. The opening near the top of the dome is disposed on the light source module 2. The inner wall of the reflector cup 4 gradually concaves from the top to the bottom of the dome, forming a concave or convex reflective surface. The dome shape refers to the reflector cup 4's geometric shape resembling a hemisphere or parabola, which can be achieved using injection molding or metal stamping processes. The dome structure reflects and focuses light, reducing the optical path length. The concave reflective surface refers to the inner wall surface being recessed into the reflector cup 4, which can be achieved using a parabolic or ellipsoidal surface, reflecting divergent light into parallel or focused light. The convex reflective surface refers to the inner wall surface bulging outwards from the reflector cup 4, which can be achieved using a spherical or aspherical structure, used to expand the beam diffusion angle or adjust the light spot distribution. Here, the light source module 2 is disposed at the opening at the top of the dome, allowing light to directly enter the interior of the reflector cup 4. The inner wall surfaces extending from the top to the bottom, designed as either concave or convex surfaces, control the reflection of light in different ways. For example, the concave reflective surface converts divergent light into a collimated beam through its parabolic curvature, while the convex reflective surface expands the beam coverage through its spherical curvature. The opening at the bottom of the dome and the laser through-hole 41 form independent optical paths, ensuring that the light from the two sources does not interfere with each other.

[0027] In a preferred embodiment, the reflector cup 4 is made of metal to dissipate the heat generated by the light source assembly during operation. The metal material refers to a material with thermal conductivity, specifically aluminum alloy, copper alloy, or stainless steel. These materials have high thermal conductivity, enabling rapid transfer of heat generated by the light source assembly to the surface of the housing 1. The bottom of the reflector cup 4 can directly contact the light source assembly. When the light source module is operating, the heat generated by the light source module 2 and the laser light source is transferred to the metal reflector cup 4 via thermal conduction, and then dissipated through the contact surface between the reflector cup 4 and the housing 1 or through air convection. For example, the reflector cup 4 can be made of aluminum alloy, with its inner wall designed as a smooth reflective surface to guide light, while its outer wall is partially and tightly fitted to the housing 1, forming a heat transfer path. This effectively solves the problem of overheating caused by prolonged operation of the light source assembly, avoiding light efficiency degradation or component damage due to excessive temperature. Furthermore, by integrating heat dissipation with the optical component structure, it ensures stable operation of the pen light even in confined spaces.

[0028] In this embodiment, the light source module 2 and the laser light source module 3 are connected to the circuit board 6, and the circuit board 6 is provided with a switch assembly 7 to control the opening and closing of the light source module 2 and the laser light source module 3.

[0029] The circuit board 6 refers to the substrate used to carry electronic components. It can be made of FR-4 material or a flexible circuit board 6. Its function is to provide power supply and signal transmission for the light source module 2 and the laser light source module 3. The switch assembly 7 refers to the device used to control the on / off state of the circuit. It can be implemented using a tactile button, a slide switch, or a touch sensor. Its function is to achieve independent on / off or coordinated control of the light source module 2 and the laser light source module 3 through user operation. The light source module 2 and the laser light source module 3 can be fixedly connected to corresponding contacts on the circuit board 6 via wires or surface mount technology. The circuit board 6 is integrated and installed in a predetermined position within the cavity of the housing 1. The contacts of the switch assembly 7 form an electrical connection with the control circuitry of the circuit board 6. When the user presses or slides the switch, the control logic on the circuit board 6 is triggered, selectively turning on or off the power supply circuits of the light source module 2 and the laser light source module 3. By integrating the switch assembly 7 onto the same circuit board 6, the wiring path of the control logic is simplified, avoiding the space occupation of additional mechanical structures, and enabling the light source control function to be implemented without increasing the diameter of the housing 1.

[0030] In one embodiment, an internal thread is provided at the end of the housing 1, and an external thread is provided on the outer side of the reflector cup 4 for threaded connection to the housing 1; a pressure cap 8 is provided on the outer side of the reflector cup 4 for mounting the lens 5 at the end of the reflector cup 4; a waterproof sealing ring 9 is provided between the pressure cap 8 and the lens 5. The internal thread is used to mate with the external thread to form a detachable connection. The reflector cup 4 can be rotated to achieve a tight fit with the internal thread of the housing 1. The pressure cap 8 is an annular component covering the end of the reflector cup 4, which can be an injection-molded plastic part or a metal stamping part, with a groove or flange structure on its inner side to fix the edge of the lens 5. The waterproof sealing ring 9 can be made of silicone or rubber, and fills the assembly gap between the pressure cap 8 and the lens 5 by compression deformation, preventing liquid or dust from seeping in.

[0031] The reflector cup 4 is axially positioned by the engagement of its external thread with the internal thread of the housing 1. The lens 5 is held in place by the cap 8 at the end opening of the reflector cup 4. During installation, after the reflector cup 4 is screwed into the housing 1 to a preset position, the cap 8 moves downward along the outer wall of the reflector cup 4 until it abuts the edge of the lens 5. At this point, the waterproof sealing ring 9 is deformed by compression, forming a continuous sealing interface at the contact surface between the lens 5 and the cap 8. In this structure, the threaded connection provides reliable mechanical fixation, avoiding the risk of loosening caused by traditional adhesive or snap-fit ​​assembly. The combination of the cap 8 and the sealing ring forms multiple sealing barriers while ensuring the stability of the optical element. In another embodiment, the cap 8 can be threaded to the housing 1 or fixedly glued.

[0032] The threaded connection enables precise positioning of the reflector cup 4 and the housing 1, avoiding the impact of assembly errors on the optical path. The combination of the pressure cap 8 and the sealing ring simultaneously achieves the functions of fixing the lens 5 and waterproofing within a compact space, saving more axial space compared to the split sealing structure.

[0033] Through the above technical solution, this application solves the problem of increased size caused by the independent installation of optical components in existing pen lamps. It achieves a compact structure while ensuring the dual light source function, and improves waterproof performance through sealing rings and threaded connections, making it suitable for portable use in humid or dusty environments.

[0034] It should be understood that the above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions that fall within the scope of the present utility model are protected by the present utility model.

[0035] The accompanying drawings used in the above description of the embodiments only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

Claims

1. A compact pen lamp, comprising a housing and a light source assembly disposed on the housing, characterized in that, The light source assembly includes a light source module, a laser source module, and a reflector cup disposed on the light path of the light source module and the laser source module. The reflector cup is provided with a through hole opposite to the light path of the laser source module for laser emission.

2. The compact pen lamp according to claim 1, characterized in that, The light source module is disposed on the central axis of the reflector cup, the laser light source module is located beside the light source module, and the through hole is disposed on the side wall of the reflector cup and is opposite to the light path of the laser light source module.

3. The compact pen lamp according to claim 1, characterized in that, The conical portion of the reflector covers the light source module to shape and focus the light generated by the light source module; a lens is provided at the end of the reflector away from the light source.

4. The compact pen lamp according to claim 3, characterized in that, The lens is made of an optically transparent material.

5. The compact pen lamp according to claim 1, characterized in that, The reflector cup is dome-shaped with openings at both ends, and the opening near the top of the dome is disposed on the light source module. The inner wall of the reflector cup gradually concaves from the top of the dome to the bottom to form a concave reflective surface or a convex reflective surface.

6. The compact pen lamp according to claim 1, characterized in that, The reflector is made of metal to dissipate the heat generated by the light source assembly during operation.

7. The compact pen lamp according to claim 1, characterized in that, The light source module and the laser light source module are connected to a circuit board, and the circuit board is provided with a switch assembly to control the opening and closing of the light source module and the laser light source module.

8. The compact pen lamp according to claim 3, characterized in that, The end of the housing is provided with an internal thread, and the outer side of the reflector is provided with an external thread for threaded connection into the housing; and a pressure cap is provided on the outer side of the reflector for mounting the lens at the end of the reflector; a waterproof sealing ring is provided between the pressure cap and the lens.

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