JPH0672105U - Variable light distribution lamp with built-in drive mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] The inner lens displacement drive mechanism that uses a solenoid as a drive source instantaneously displaces and moves the inner lens formed in the main frame to switch the relative position with respect to the outer lens. [Structure] A lamp 3 that emits a parallel light flux is directly attached to a metal frame-shaped main frame 1, and an outer lens 2 is attached to the main frame 1 positioned on the front optical axis L thereof. The inner lens 4 is movably fixed and supported on the optical axis L of the lamp 3 through an inner lens displacement support mechanism 5, and the inner lens displacement support mechanism 5 is provided.
Is configured to be displaced by an inner lens displacement drive mechanism 6 having a solenoid 8 as a drive source.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved variable light distribution lamp, and more particularly to a variable light distribution lamp with a built-in drive mechanism that improves the positioning accuracy of the variable light distribution mechanism and has excellent responsiveness in light distribution switching operations.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as a headlight or a fog lamp for a vehicle such as an automobile, various variable light distribution lamps configured to change a light distribution pattern and a light irradiation direction of a light beam according to a driving condition of the vehicle have been used. The lamps shown in FIGS. 2 (a) and 2 (b) are conventionally used as such variable light distribution type lamps, and are provided with a bulb 50 for lighting at the focal point position of the parabolic reflector surface. An outer lens 52 orthogonal to the optical axis is provided on the front optical axis of a reflector 51 adapted to irradiate a parallel light flux, and an optical axis direction between the outer lens 52 and the bulb 50 is orthogonal to the optical axis. The inner lens 53 is displaceably pivoted in the direction, and the inner lens driving section 55 driven by the motor 54 displaces the inner lens 53 in the optical axis direction and the direction orthogonal to the optical axis. Then, the relative position of the inner lens 53 with respect to the outer lens 52 is adjusted and displaced so that the irradiation pattern can be changed in association with changes in vehicle speed and the like.

Therefore, the reflector 51 and the inner lens driving unit 55 are integrally formed, the assembly is fixed to the inside of the lamp body 56, and the outer lens 52 is also fixed to the lamp body 56 in the same manner. Further, since the inner lens 53 is pivotally provided via the sliding shaft of the inner lens drive section 55, the positional accuracy of both lenses 52 and 53 is greatly influenced by the dimensional accuracy of the lamp body 56.

[0004]

[Problems to be solved by the device]

 However, in the above-described conventional variable light distribution type lamp, a synthetic resin is used as a material for weight reduction, and it is impossible to increase the dimensional accuracy thereof, so that when the inner lens 53 is driven and displaced. Not only becomes unstable, but also the inner lens 53 and the outer lens 52 are composed of cylindrical lenses 57 of equal pitch, so that the structure of both lenses and the dimensional accuracy of the lamp body 56 are low. Therefore, there is a problem in that the optical axis of the lens step is deviated, and a light distribution defect such as a left-right imbalance in the diffusion angle or uneven illuminance occurs.

The present invention has been made in view of the above problems, and the switching accuracy of the relative position of the outer lens and the inner lens is displaced with high accuracy to form a reliable light distribution pattern, It is an object of the present invention to provide a variable light distribution lamp with a built-in drive mechanism, which has a simple structure in which the light distribution pattern required for driving can be instantly switched.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the variable light distribution lamp with a built-in driving mechanism according to the present invention has an outer lens and an inner lens arranged on the front optical axis of a lamp configured to emit a parallel light flux, and the inner lens In a variable light distribution lamp with a built-in drive mechanism, in which the outer lens and the lamp are pivotally installed so that their relative positions can be freely displaced in the optical axis direction with respect to the outer lens, the outer lens and the lamp are made of a metal tubular frame. Assemble directly to the front and rear of the main frame, and firmly fix and support the inner lens disposed between the outer lens and the lamp on the inner lens displacement support mechanism, and mount the inner lens displacement support mechanism on the main frame side. The inner lens displacement drive mechanism, which is the drive source, is used for displacement driving to change the irradiation pattern of the forward irradiation light flux. It is an gist.

[0007]

[Action]

 According to the above structure, the inner lens displacement support mechanism is instantaneously displaced to the predetermined switching position by the inner lens displacement drive mechanism in which the inner lens is fixed to the metal cylindrical frame as a drive source, and the inner lens displacement drive mechanism is used. Since the inner lens displacement drive mechanism is fixed to the metal cylinder-shaped main frame, it is possible to control the positional accuracy between the outer lens and the inner lens with high accuracy. In other words, the inner lens displacement drive mechanism that mounts the inner lens displacement support mechanism, which is the movable part assembly of the inner lens, and the outer lens are fixed to the main frame with high dimensional accuracy. The initial position of the lens can be accurately formed.

[0008]

【Example】

 An embodiment of a variable light distribution lamp with a built-in driving mechanism according to the present invention will be described below with reference to the drawings. In the drawing, reference numeral 1 denotes a metal cylinder frame-shaped main frame, which has a front opening end 1a to which an outer lens 2 is covered and fixed, and a projector lamp 3 which is integrally fixed to a rear opening end to form a lamp assembly. The inner lens 4 is disposed on the optical axis L of the projector lamp 3 inside the cylindrical main frame 1, and the inner lens 4 is positioned relative to the outer lens 2. The inner lens displacement supporting mechanism 5 for changing the position is fixedly supported.

The main frame 1 is formed of metal such as aluminum die cast, and a lens frame 21 integrally formed with the outer lens 2 on the front surface is covered and fitted to the outer peripheral portion of the front opening end 1a. And a flange 32 formed on the rear opening end 1b side with respect to the flange 11 formed on the outer periphery of the lamp body 31 of the projector lamp 3 via a small screw (not shown). It has a fixed structure. Further, the outer lens 2 has a structure in which a large number of convex cylindrical lens steps 22, 22, ... Are arranged in parallel in the lateral direction at an equal pitch, and the outer lens 2 is formed on the surface of the inner lens 4 having the optical axis L in common. Is also formed with a large number of concave cylindrical lens steps 41, 41 ... Which are arranged in parallel with the cylindrical lens steps 22, 22 of the outer lens 2 in the horizontal direction.

The inner lens displacement support mechanism 5 according to the present invention has a structure that is slidably mounted on an inner lens displacement drive mechanism 6, which is a structure fixedly provided on the outer periphery of the lower surface of the main frame 1. That is, the inner lens displacement support mechanism 5 forms the inner lens fixing support portion 52 on the upper surface of the front-rear moving guide 51, and fits and fixes the lower end portion of the inner lens 4 to the inner lens fixing support portion 52. At the same time, guide edges 53, 53 formed on both left and right edges along the lower surface sliding direction of the front-rear movement guide 51 are formed on the left and right side plates of the drive mechanism housing 61 of the inner lens displacement drive mechanism 6 described above. The structure is such that it fits into 62, 62. The inner lens fixing support portion 52 of the inner lens displacement support mechanism 5 having the above structure is inserted into the main frame 1 through the support mechanism mounting hole 12 formed in the lower surface of the main frame 1, and the opening length along the axial direction is set. It is designed so that it can be displaced within a range.

In the inner lens displacement driving mechanism 6, a pair of self-holding type solenoids 8 and 8 sharing the operating rod 7 are arranged in the driving mechanism housing portion 61 so as to face each other, and both ends of the operating rod 7 are connected. Each of them is axially installed so as to be freely slidable so as to be able to slide by suction. The engaging groove 71 formed at the center of the operating rod 7 is provided with the front-rear movement guide 51 of the inner lens displacement supporting mechanism 5. The front and rear of the inner lens displacement support mechanism 5 fitted with the engagement block 54 formed to project from the lower surface and engaged with the engagement groove 71 of the operating rod 7 by the attraction of the operating rod 7 accompanying the excitation of the solenoid 8 The engaging block 54 on the moving guide 51 side is pushed and moved in the axial direction (direction of arrow A), and the inner lens 4 fixedly supported on the front and rear moving guide 51 via the inner lens fixing and supporting portion 52 is projected. By moving the inner lens 4 forward or backward along the optical axis L, the relative position of the inner lens 4 with respect to the outer lens 2 in the main frame 1 is displaced.

Regarding the structure of the operating rod 7 that connects the pair of solenoids 8 and 8, the plungers of both solenoids 8 and 8 are integrally formed, or the plungers of the solenoids 8 and 8 are separately provided. The connecting rod, connecting plate, etc. may be connected to form an integrated structure. Reference numeral 9 is a bamboo shoot spring wound around the operating rod 7.

As described above, the inner lens displacement driving mechanism 6 has a pair of self-holding solenoids 8 and 8 arranged opposite to each other in the driving mechanism housing 61, and the pair of solenoids 8 and 8 share the operating rod 7. It is possible to form three stop positions between the stoppers 63, 63 (arrow B) formed on the inner wall of the drive mechanism accommodating portion 61. By the synergistic effect of the action and the spring force of the bamboo shoot-shaped spring 9, it is instantaneously displaced to an arbitrary stop position and stopped. That is, since the relative position of the inner lens 4 with respect to the outer lens 2 can be switched in three steps on the optical axis L of the projector lamp 3 by the stop position of the operating rod 7, it is formed on the surfaces of both lenses 2 and 4. The lens action of the lens steps 22 and 41 makes it possible to form a light distribution pattern of “condensing”, “medium diffusion”, and “diffusion”, and for example, a three-mode fog lamp can be configured.

According to the above structure, the inner lens displacement support mechanism 5 slidably mounted on the drive mechanism housing portion 61 of the inner lens displacement drive mechanism 6 in which the inner lens 4 is fixed to the main frame 1. Since the structure is fixedly supported, the displacement accuracy of the inner lens 4 with respect to the outer lens 2 is determined by the accuracy of the main frame 1 interposed between the lenses 2 and 4. However, in the configuration of the present invention, since the main frame 1 is made of metal such as aluminum die cast, the relative position between the lenses 2 and 4 can be secured with high accuracy.

In the above embodiment, the structure using the projector lamp 3 is described in detail, but it is possible to replace the projector lamp 3 with a lamp equipped with a so-called parabolic reflector. Of course, the same effects as those of the above embodiment can be obtained. Also, the shape of the lens steps 22 and 41 formed on the outer lens 2 and the inner lens 4 is not limited to the combination of the concave or convex shapes described above, and a lens step for appropriately forming a desired light distribution pattern It goes without saying that it can be configured by.

[0016]

[Effect of device]

 In the variable light distribution lamp with a built-in drive mechanism according to the present invention, the relative position of the inner lens with respect to the outer lens formed on the metal main frame is displaced and moved by the inner lens drive mechanism using the solenoid as the drive source. Since the desired light distribution pattern can be instantaneously selected and switched, not only is it easier to control the operation of the vehicle, but also the outer lens, inner lens, projector lamp and other lamps, and inner lens displacement. Since the support mechanism and the inner lens drive mechanism are attached, the relative displacement position of both lenses can be accurately controlled by the rigidity of the main frame and the high precision moldability, and the position of the switched light distribution pattern can be controlled. Can always be stable.

Further, as a variable light distribution type lamp structure with a built-in drive mechanism, an extremely simple structure can be realized, which is excellent in assemblability and rigidity, and can be firmly and accurately mounted on the vehicle body. The present invention has features such that it can be securely fixed and held, and that the optical axis of the lamp can be eliminated, and the effect obtained by implementing the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a variable light distribution lamp with a built-in driving mechanism according to the present invention.

FIG. 2 is a partially cutaway side sectional view (a) and a partially cutaway plan sectional view (b) showing a conventional variable light distribution lamp with a built-in drive mechanism.

[Description of symbols] 1 main frame 11 flange 12 support mechanism mounting hole 2 outer lens 22 lens step 3 projector lamp 31 lamp body 32 lamp flange 4 inner lens 41 lens step 5 inner lens displacement support mechanism 51 front-back movement guide 52 inner lens fixing Support portion 53 Guide edge 54 Engagement block 6 Inner lens displacement drive mechanism 61 Drive mechanism housing portion 62 Guide groove 63 Stopper 7 Actuating rod 8 Solenoid

Claims (1)

[Scope of utility model registration request] 1. An outer lens and an inner lens are arranged on a front optical axis of a lamp configured to emit a parallel light flux, and the inner lens is freely displaced in its optical axis direction with respect to the outer lens. A variable light distribution lamp with a built-in drive mechanism that is pivotally installed so that the outer lens and the lamp are attached to the front and rear of a metal frame-shaped main frame, and are arranged between the outer lens and the lamp. The inner lens is fixedly supported by an inner lens displacement supporting mechanism, and the inner lens displacement supporting mechanism is displacement driven by an inner lens displacement driving mechanism having a solenoid fixedly mounted on the main frame side as a drive source to irradiate a forward irradiation light beam. A variable light distribution lamp with a built-in drive mechanism, characterized in that the pattern is changed.