JPH0548107U - Headlamp aiming mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a headlamp aiming mechanism that does not impair the operability of the aiming screw. [Structure] A synthetic resin bevel gear 40 that meshes with a Phillips screwdriver tip 50a is attached to a rear portion of an aiming screw 30 that supports a reflector 20 and penetrates a synthetic resin lamp body 10 back and forth and rotatably supports a penetration portion. A synthetic resin driver receiving portion 12 is provided integrally with the rear portion of the lamp body 10 to secure the meshing of the bevel gear 40 with the plus driver tip 50a by sliding contact with the plus driver tip 50a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an aiming mechanism of a headlamp of a movable reflector type for an automobile or the like.

[0002]

[Prior art]

 FIG. 4 is a diagram for explaining an aiming mechanism of a conventional reflector movable type headlamp. The reflector 2 is supported by a tilt fulcrum (not shown) fixed to the lamp body 5 and a tip of the aiming screw 1 penetratingly supported by the lamp body 5. The tip of the aiming screw 1 is screwed into a nut 4 fixed to the end portion 3 of the reflector 2. When the aiming screw 1 is rotated, the reflector end portion 3 moves back and forth, and the reflector 2 is not shown. Aiming can be adjusted by tilting around the tilt fulcrum. A metal crown gear 6 is integrated at the rear end of the aiming screw 1, and the teeth 6a of the crown gear 6 are meshed with the tips 9a of the Phillips screwdriver 9 to rotate the Phillips screwdriver 9. The screw 1 can rotate. A cylindrical synthetic resin guide holder 7 into which a Phillips screwdriver 9 is fitted is fixed to the back surface of the lamp body 5, and a Phillips screwdriver tip 9a is received by a stopper piece 7c formed inside the guide holder 7. As a result, the meshing between the crown gear teeth 6a and the tip of the plus driver 9a is secured.

[0003]

[Problems to be solved by the invention]

 However, in the above-mentioned conventional technique, the crown gear teeth 6a and the stopper piece 7c which are in sliding contact with the tip of the plus driver 9a are made of metal and synthetic resin, respectively, and the hardness thereof is remarkably different. For this reason, while performing aiming adjustments many times, the synthetic resin stopper piece 7c, which is softer than the hard crown gear tooth 6a, wears down first, and the engagement between the plus driver tip 9a and the crown gear tooth 6a occurs. There is a problem that the state becomes worse, that is, the operability of aiming becomes worse.

Further, since the crown gear teeth 6a are made of metal (generally made of an iron alloy that is easy to process), there is a problem in that they are rusted and the meshing state with the driver tip 9a deteriorates. The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide an aiming mechanism for a headlamp that does not impair the operability of the aiming screw.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in an aiming mechanism of a headlamp according to the present invention, an aiming screw for supporting a reflector is rotatably supported in a penetrating portion while penetrating a synthetic resin lamp body in the front and rear, A synthetic resin bevel gear that meshes with the tip of a Phillips screwdriver is integrally provided at the rear of the aiming screw, and the tip of the Phillips screwdriver slides on the rear of the lamp body to ensure the mesh between the Phillips driver tip and the bevel gear. The receiving part is formed integrally.

[0006]

[Action]

 Both the bevel gear and the driver receiving part are made of synthetic resin and have the same hardness, so even if they make sliding contact with the tip of the plus driver, they both wear down without wear, and both the plus driver tip and the bevel gear. The meshed state of is always kept constant. Further, since the bevel gear and the driver receiving portion are both made of synthetic resin, there is no possibility of rusting and poor engagement between the tip of the plus driver and the bevel gear.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a vertical sectional view showing an embodiment of an aiming mechanism of a headlamp according to the present invention, FIG. 2 is a longitudinal sectional view of a main part of the aiming mechanism, and FIG. It is a front view which fractures | ruptures and shows a part (III-III line of FIG. 2) of an aiming mechanism.

In these drawings, reference numeral 10 denotes a container-shaped synthetic resin lamp body, and a front lens 10b is attached to a front opening portion of the lamp body 10 to form a lamp chamber space. A reflector 20 having a valve (not shown) inserted therein is housed and arranged therein. Reference numeral 30 denotes a metal aiming screw that penetrates the lamp body 10 in the front-rear direction and is rotatably supported at the penetrating portion. The reflector 20 is provided on the tip portion 31 of the screw 30 and the lamp body 10. It is supported by a tilting fulcrum (not shown). The tip 31 of the aiming screw 30 is screwed with a synthetic resin nut 20b fixed to the back side of the end 20a of the reflector 20, and when the screw 30 is rotated, the reflector end 20a is moved back and forth. Therefore, the reflector 20 tilts around a tilting fulcrum (not shown) to adjust the aiming.

A flange 30a is formed at a rear end portion of the metal aiming screw 30 projecting to the rear surface of the lamp body 10, and a synthetic resin bevel gear 40 is inserted at a rear portion of the screw 30. It is integrated by molding. The bevel gear 40 integrated portion of the screw 30 is provided with a bevel gear retaining step portion 30b and a bevel gear idling prevention serration portion 30c sandwiching the step portion 30b. Further, the teeth 40a of the bevel gear 40 can be meshed with the tip 50a of the plus driver 50 and are formed toward the rear surface side of the lamp body 10. On the other hand, on the back surface of the body 10, there are provided a guide cylinder 11 into which the plus driver 50 can be fitted, and a driver receiving portion 12 that receives the plus driver tip 50a and secures the engagement between the plus driver tip 50a and the bevel gear 40. , Made of synthetic resin in one piece. That is, when the Phillips driver 50 is inserted into the guide cylinder 11 and the Phillips driver tip 50a is brought into contact with the driver receiving portion 12, the bevel gear teeth 40a and the Phillips driver tip 50a mesh, and the Phillips screwdriver 50 is rotated. At the same time, the screw 30 rotates smoothly, and the reflector 20 can be tilted to adjust the aiming.

The aiming screw 30 is prevented from slipping forward by the flange 30 a contacting the back surface of the lamp body 10. On the other hand, a groove 30d is formed in the circumferential direction at a position where the screw 30 protrudes to the front surface of the lamp body 10, and a push-on fix 60 is attached to the groove 30d in a direction to press the front surface of the lamp body 10. The screw 30 is prevented from coming off backward and is urged forward. In this way, the screw 30 is rotatably supported by the lamp body 10.

Further, a rubber O-ring 70 is formed in a rear portion of the lamp body 10 at a penetrating portion of the aiming screw 30, and a rubber O ring 70 is formed to seal the space between the body 10 and the screw 30. A plain washer 80 is provided between the O-ring 70 and the flange 30a so as to conceal the O-ring 70 and smooth the sliding contact between the rear surface of the body 10 and the flange 30a to facilitate the rotation of the screw 30. ..

A wave washer 90 is installed between the front side of the lamp body 10 and the push-on fix 60 to increase sliding friction between the body 10 and the push-on fix 60 and to prevent the screw 30 from loosening. Has been done. Further, the rear portion of the bevel gear 40 is formed with a hexagonal bolt head 40b that can be engaged with a socket wrench, and a positive type recess 40c with which the positive driver tip 50a can be engaged is formed at the front center position of the bolt head 40b. Has been done.

Although the aiming screw 30 is made of metal and the bevel gear 40 is made of synthetic resin in this embodiment, the aiming screw 30 may be made of synthetic resin, and the aiming screw and bevel gear are May be integrally formed of synthetic resin.

[0014]

[Effect of the device]

 As is apparent from the above description, in the aiming mechanism of the headlamp according to the present invention, both the bevel gear and the driver receiving portion that are in sliding contact with the tip of the plus driver wear out similarly, and thus the aiming adjustment is repeated. Even if it goes, the meshing state between the plus driver tip and the bevel gear is always kept constant, and a certain operability is guaranteed for a long time.

Further, since the bevel gear and the driver receiving portion are not rusted and the meshing state between the tip of the plus driver and the bevel gear is not deteriorated, the aiming mechanism of the headlamp having high environment resistance can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of an aiming mechanism of a headlamp according to the present invention.

FIG. 2 is a longitudinal sectional view of the main part of the aiming mechanism.

FIG. 3 is a front view showing a part of the aiming mechanism broken away.

FIG. 4 is a vertical view of a conventional headlamp aiming mechanism.

[Explanation of symbols]

 10 Synthetic Resin Lamp Body 12 Synthetic Resin Driver Receptor 20 Reflector 30 Aiming Screw 40 Synthetic Resin Bevel Gear 50a Plus Driver Tip

Claims (1)

[Scope of utility model registration request] 1. A synthetic resin bevel gear that pierces a synthetic resin lamp body in the front-rear direction and is rotatably supported at a penetrating portion, and an aiming screw supporting a reflector is engaged with a tip of a plus driver. The headlamp is characterized in that a synthetic resin driver receiving portion is integrally formed on the rear portion of the lamp body, and the tip of the plus driver is slidably contacted with the bevel gear to ensure engagement of the bevel gear. Aiming mechanism.