Disclosure of Invention
The embodiment of the invention provides a lens and a head lamp, which are used for solving the problems that a user of the head lamp is uncomfortable in use and the light utilization rate of the head lamp is low in the prior art.
In order to achieve the above object, in one aspect, the present invention provides a lens, wherein the lens is flat and elongated, two end surfaces of the lens in the longitudinal direction are a left side surface and a right side surface, two opposite surfaces of the lens in the longitudinal direction are a light incident surface and a light emergent surface, two side surfaces of the lens, which are sandwiched between the light incident surface and the light emergent surface in the longitudinal direction, are an upper side surface and a lower side surface, the light incident surface is recessed relative to the center direction of the lens, the light emergent surface protrudes relative to the center direction of the lens, and the light spot of the light emitted by the lens is in the shape of human eyes.
Alternatively to this, the method may comprise,
The upper side surface and the lower side surface of the lens are connected with the light-emitting surface, and fixedly connected parts are arranged in an extending mode and are used for fixedly clamping the lens in the lamp.
Optionally, the lens has a longitudinal cross section,
The cambered surface radius of the light-emitting surface is 8-10mm, and the included angle is 120-130 degrees;
the cambered surface radius of the light incident surface is 12-18mm, and the included angle is 25-35 degrees;
the light-emitting surface and the light-entering surface are arranged in a central symmetry mode and have the same central symmetry axis, and the distance between the center of the cambered surface of the light-emitting surface and the center of the cambered surface of the light-entering surface on the central symmetry axis is 13-16mm.
Alternatively to this, the method may comprise,
The upper side and the lower side of the lens are straight surfaces, or
The upper side surface and the lower side surface of the lens are free curved surfaces, and the free curved surfaces are formed by adjusting a plurality of adjusting points based on straight surfaces;
the adjusting points are multiple, and relative to the light incident surface and the light emergent surface, most of the adjusting points are closer to the light incident surface, and the adjusting distance is smaller than 0.1mm.
Alternatively to this, the method may comprise,
The left side surface and the right side surface of the lens are straight surfaces, or
The left side surface and the right side surface of the lens are spherical surfaces, and the spherical surfaces are obtained by adopting a rotary cutting method;
The rotary cutting method is characterized in that the lens is assumed to be an infinite long body before being cut, the lens is horizontally placed, the light-emitting surface is located on the upper side of the light-entering surface, a central connecting line of two planes is taken as a vertical axis, a straight line perpendicular to the midpoint of the central connecting line and along the lengthwise direction of the lens is taken as a horizontal axis, any point on a plane formed by the horizontal axis and the vertical axis is taken as a sphere center, a sphere is drawn, the infinite long body is cut by the sphere, the lens is obtained, the radius of the sphere is 10-15mm, and the included angle between the connecting line of the upper vertex and the lower vertex of the two side faces after cutting and the vertical axis is 25 DEG to 30 deg.
Alternatively to this, the method may comprise,
The two edges of the light incident surface of the lens in the longitudinal direction are straight surfaces.
Alternatively to this, the method may comprise,
The lens is made of PC material.
In another aspect, the invention provides a headlamp employing a lens as described above.
Alternatively to this, the method may comprise,
The head lamp comprises a shell, a light source and a lens, wherein the shell is provided with an opening, the light emitting surface of the lens is directly exposed in the air from the opening of the shell, and the distance between the light source and the light emitting surface of the lens is 0.8-1.5mm.
Alternatively to this, the method may comprise,
The head lamp is provided with a sensing device, when the head lamp senses that a human hand swings twice, the head lamp is controlled to be turned off or turned on, and the time interval between the human hand swinging twice is 0.1-0.6 seconds.
The invention has the beneficial effects that:
The embodiment of the invention provides a lens and a head lamp, wherein the lens is in a flat and longitudinal shape, two end faces of the lens in the longitudinal direction are a left side face and a right side face, two opposite faces of the lens in the longitudinal direction are a light inlet face and a light outlet face, two side faces of the lens, which are clamped between the light inlet face and the light outlet face in the longitudinal direction, are an upper side face and a lower side face, the light inlet face is recessed relative to the central direction of the lens, the light outlet face is protruded relative to the central direction of the lens, and by the design, the light spots of light emitted by the lens are ensured to be in a 'human eye' shape, the overlapping viewing area angles of two eyes of people are met, the visual requirements of people are met, and the comfort feeling of a user in use is improved. Through the headlight of design installation lens as above, and set up induction system in the headlight for the staff is swung twice and can be with the headlight is opened and shut, and the person of facilitating the use operates, has saved operating time, has improved work efficiency.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The existing headlamps are of two types, namely a spotlight type headlamp and a floodlight type headlamp, wherein the spotlight type headlamp has higher brightness in a light irradiation range and is quite dark outside the light irradiation range, so that the use feeling brought by a user is quite uncomfortable, and the floodlight type headlamp has low contrast ratio of light and shade, but the utilization ratio of light is quite low. And the brightness and weakness of the light in the headlight and the contrast in the illumination range depend on the design of the lens.
Therefore, the invention designs a lens capable of radiating a light spot in a shape of human eyes, fig. 1 is a schematic structural view of a lens according to an embodiment of the invention, as shown in fig. 1, the lens is flat and elongated, two end faces in the lengthwise direction of the lens are a left side face 6 and a right side face 7, two opposite faces in the lengthwise direction of the lens are a light incident face 1 and a light emergent face 2, two side faces, which are clamped between the light incident face 1 and the light emergent face 2 in the lengthwise direction of the lens, are an upper side face 4 and a lower side face 5, the light incident face 1 is recessed relative to the center direction of the lens, the light emergent face 2 is protruded relative to the center direction of the lens, and the light spot of light emitted by the lens is in a human eye shape.
The lens is a polyhedron, comprises a light incident surface 1 and a light emergent surface 2, which are designed relatively and positioned in the flat direction of the lens, wherein the light incident surface 1 is recessed relative to the central direction of the lens and is used for collecting light of the light source, and the light emergent surface 2 is protruded relative to the central direction of the lens and is used for diverging the collected light. Further, the lens also comprises an upper side 4 and a lower side 5 which are correspondingly designed, and a left side 6 and a right side 7 which are correspondingly designed.
By the design, the light emitted by the lens irradiates on the irradiation surface and forms a light spot, and when the light irradiates on the 1.2x1.6m irradiation surface at the front 0.8m, a typical light spot with a 'human eye' shape is formed, namely, the light spot is strong in middle, weak in peripheral light and approximately elliptical. The intensity distribution of the light spots is highly matched with the visual perception of common eyes, namely, when the common eyes watch things, the sight is mainly concentrated in the middle part, and meanwhile, the two sides are seen by the residual lights, and the light spots are designed to meet the illumination intensity requirement of the main sight and also compensate the habit of the vision of the residual lights of people, so that the comfort feeling of a user in use is improved. The light utilization rate of the lamp can reach 92%.
Further preferably, on the basis of the above embodiment, a fixing portion 3 is provided at a joint of the upper side surface 4 and the lower side surface 5 of the lens and the light-emitting surface 2 in an extending manner, and the fixing portion 3 is used for fixing and clamping the lens in the lamp.
The lens is used for gathering and dispersing light so as to facilitate the illumination of a user, the lens is required to be installed in a lamp so as to be convenient for the user to carry, in order to ensure that the lens can be well clamped in the lamp and does not shake, the joint of the upper side surface 4 and the lower side surface 5 of the lens and the light-emitting surface 2 is extended and provided with a fixedly connecting part 3, the fixedly connecting part 3 is used for connecting two planes in different directions on the lens and clamping the lens in the lamp, the light emitted from the fixedly connecting part 3 is very little and does not have substantial influence on light spots emitted by the lens, and particularly, the fixedly connecting part 3 is made of PC material, and the PC material has the characteristics of high transparency, light weight, shock resistance, sound insulation, heat insulation, flame resistance, ageing resistance and the like, and can reduce light loss.
Further, as shown in fig. 2, the fixing portion 3 is correspondingly convex on the cross section, in a practical application scenario, the fixing portion 3 may be correspondingly designed to be a convex with any shape such as a circular convex, a triangular convex, a polygonal convex, etc. on the cross section, and the shape of the fixing portion 3 is not limited in the present invention, so long as the fixing portion 3 can well clamp the lens in the lamp.
On the basis of the embodiment, the cross section of the lens in the longitudinal direction is further optimized, the cambered surface radius of the light-emitting surface 2 is 8-10mm, the included angle is 120-130 degrees, the cambered surface radius of the light-entering surface 1 is 12-18mm, the included angle is 25-35 degrees, the light-emitting surface 2 and the light-entering surface 1 are arranged in a central symmetry mode and have the same central symmetry axis, and the distance between the cambered surface center of the light-emitting surface 2 and the cambered surface center of the light-entering surface 1 on the central symmetry axis is 13-16mm.
Fig. 2 is a schematic structural view of a cross section according to an embodiment of the present invention, as shown in fig. 2, in which the radius of the arc surface of the light-emitting surface 2 is 9mm, the included angle is 125 °, the included angle is consistent with the stereoscopic vision angle of both eyes of a person, in which the radius of the arc surface of the light-entering surface 1 is 15mm, the included angle is 30 °, and further, in this embodiment, the distance between the center of the arc surface of the light-emitting surface 2 and the center of the arc surface of the light-entering surface 1 on the central symmetry axis is 14mm. It should be noted that this embodiment is only one specific embodiment of the present invention, and the present invention may be arbitrarily combined with the arc radii and the included angles of the light incident surface 1 and the light emergent surface 2 according to a set range, so as to obtain various practical embodiments. Furthermore, the overlapping view of the two eyes of the person is 124 degrees, and the lens is matched with the included angle range of the light emitting surface, so that the lens can form a typical light spot in the shape of a human eye. In the invention, the included angle of the light emitting surface 2 is designed according to the overlapping viewing angles of the two eyes of a user, so that the comfort feeling of the user during use can be ensured.
As shown in fig. 2, the upper side surface 4 and the lower side surface 5 of the lens are straight surfaces, or the upper side surface 4 and the lower side surface 5 of the lens are free curved surfaces, the free curved surfaces are formed by adjusting a plurality of adjusting points based on the straight surfaces, and the adjusting points are more than one and are closer to the light incident surface 1 relative to the light incident surface 1 and the light emergent surface 2, and the adjusting distance is smaller than 0.1mm. In addition, the upper side 4 and the lower side 5 shown in fig. 3 are both straight surfaces, and the upper side 4 and the lower side 5 can be designed to be free curved surfaces, so that the light spots formed by the lenses more conform to the shape of human eyes, when people use the head lamp for illumination, the light spots formed on the illumination surfaces not only meet the requirement of main sight illumination intensity, but also compensate the habit of people for afterlight vision, thereby improving the comfort feeling of the users during use.
Fig. 3 is a schematic diagram of a front structure of a lens according to an embodiment of the present invention, as shown in fig. 3:
On the basis of the embodiment, the left side surface 6 and the right side surface 7 of the lens are straight surfaces, or the left side surface 6 and the right side surface 7 of the lens are spherical surfaces, the spherical surfaces are obtained by adopting a rotary cutting method, the rotary cutting method is used for setting the lens to be an infinite long body before cutting, the lens is horizontally placed, the light emitting surface 2 is positioned on the upper side of the light entering surface 1, a central connecting line of two planes is taken as a vertical axis, a straight line perpendicular to the midpoint of the central connecting line and along the lengthwise direction of the lens is taken as a horizontal axis, any point on a plane formed by the horizontal axis and the vertical axis is taken as a center of sphere, a sphere cuts the infinite long body to obtain the lens, the radius of the sphere is 10-15mm, and the included angle between the connecting line of the upper vertex and the lower vertex of the two side surfaces after cutting and the vertical axis is 25-30 degrees.
In the invention, the left side surface 6 and the right side surface 7 of the lens can be straight surfaces at the same time, and more preferably, the two side surfaces are spherical surfaces at the same time, wherein the spherical surfaces are obtained by adopting a rotary cutting method, and the embodiment is described in the following that the lens is horizontally placed, at the moment, the light emitting surface 2 is positioned at the upper side of the light entering surface 1, a central connecting line of two planes is taken as a vertical axis, a straight line perpendicular to the midpoint of the central connecting line and along the longitudinal direction of the lens is taken as a horizontal axis, any point on a plane formed by the horizontal axis and the vertical axis is taken as a sphere center, a sphere with the radius of 13mm is drawn, and the included angle between the connecting line of the upper peak and the lower peak of the two side surfaces after cutting and the vertical axis is 29 degrees. Further preferably, the above embodiment is further characterized in that both edges of the light incident surface 1 of the lens in the longitudinal direction are straight surfaces.
The two edges of the light incident surface 1 of the lens in the longitudinal direction are designed to be straight surfaces instead of cambered surfaces, so that the light incident surface 1 of the lens is aligned with light, and the design ensures that the included angle between the light incident surface 1 and the upper side surface 4 and the lower side surface 5 is not sharp, and is also beneficial to manufacturing the lens and clamping the lens in a lamp.
Further optimized on the basis of the embodiment, the lens is made of PC material.
The PC material has the characteristics of high transparency, light weight, impact resistance, sound insulation, heat insulation, flame retardance, ageing resistance and the like, the light efficiency of a light source can be improved due to the high transparency, and the light loss can be reduced.
In another aspect, the invention provides a headlamp employing a lens as described above.
The lens is clamped in the head lamp, the lamp strip is designed on the head lamp, and the lamp strip is worn on the head of a human body, so that a user can conveniently illuminate.
Further optimized on the basis of the embodiment, the head lamp comprises a shell, wherein the shell is provided with an opening, the light emitting surface 2 of the lens is directly exposed in the air from the opening of the shell, and the head lamp further comprises a light source, and the distance between the light source and the light entering surface 1 of the lens is 0.8-1.5mm.
In a specific embodiment, a front shell is further arranged in the head lamp, the front shell is made of transparent materials, the front shell and the lens are assembled at the opening position of the shell, the light incident surface 1 of the lens is aligned with the light source, and the light emergent surface 2 of the lens is aligned with the front shell and assembled at the opening position of the shell.
Furthermore, on the basis of the embodiment, the front shell and the lens are optimized, the front shell and the lens are integrally formed, and the light-emitting surface 2 of the lens can be directly exposed to the air from the opening of the shell without assembly, wherein the shell is made of opaque materials except for the position of the opening. The front shell and the lens are integrally formed, so that the light-emitting efficiency can be improved, and the assembly process is simplified.
The light incident surface 1 of the lens is aligned to the light source for gathering the light of the light source, the light source is a COB light source, the COB light source is adopted because the light is uniform in light emission, soft in light, free of glare and free of damage to eyes, the reliability is high, dead light and no light spots are avoided, the color rendering index is high, the light efficiency is high, therefore, the assembly process is simplified by integrating the lens with the front shell, the working efficiency is improved, the light source is selected appropriately, the light is uniform in light emission, soft in light, comfort feeling of a user in use is guaranteed, and the light efficiency is high, so that the light utilization rate of the lamp can reach 92%.
Further optimized on the basis of the embodiment, the head lamp is provided with a sensing device, when the head lamp senses that a human hand swings twice, the head lamp is controlled to be turned off or turned on, and the time interval between the two human hand swings is 0.1-0.6 seconds.
The induction device in the head lamp can induce the hand to swing, if the hand swings once, misoperation is easy to cause, for example, when the head lamp is worn and turns around, things just in front of the head cover the induction light, the induction device can be triggered to control the switch of the head lamp, and a user can only turn around to watch things and does not want to control the switch of the head lamp in practice, therefore, the induction device in the head lamp is arranged to induce the hand to swing twice, and the induction device can be triggered to control the head lamp to be closed or opened no matter the hand swings twice (in opposite directions) or swings twice in the same direction continuously, and the time interval between the two times of the hand swing is 0.1-0.6 seconds, so that the misoperation can be well avoided.
The invention has the beneficial effects that:
The embodiment of the invention provides a lens and a head lamp, wherein the lens is in a flat and longitudinal shape, two end faces of the lens in the longitudinal direction are a left side face and a right side face, two opposite faces of the lens in the longitudinal direction are a light inlet face and a light outlet face, two side faces of the lens, which are clamped between the light inlet face and the light outlet face in the longitudinal direction, are an upper side face and a lower side face, the light inlet face is recessed relative to the central direction of the lens, the light outlet face is protruded relative to the central direction of the lens, and by the design, the light spots of light emitted by the lens are ensured to be in a 'human eye' shape, the overlapping viewing area angles of two eyes of people are met, the visual requirements of people are met, and the comfort feeling of a user in use is improved. Through the headlight of design installation lens as above, and set up induction system in the headlight for the staff is swung twice and can be with the headlight is opened and shut, and the person of facilitating the use operates, has saved operating time, has improved work efficiency.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.