JPH0437812Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a cleaner for automobile lamps.

<Conventional technology> Conventionally, the 6th cleaner for automobile lamps was used.
As shown in the figure, a cleaner is known that wipes the surface of a lens 2 of a headlamp 1 by rotating it.

<Problems to be solved by the invention> The above-mentioned conventional rotary cleaner can wipe flat surfaces and large curved surfaces, but in the case of a lens with a curved cross section in the shape of a mountain with a convex apex in the center and two sloped upper and lower sides. etc., it is not possible to wipe two inclined surfaces with the rotation of one wiper arm, and two or more wiper arms corresponding to each surface are required. Moreover, in any case, in the case of the swinging type, there is a problem in that wipes may be left behind inside and outside the swinging trajectory of the wiper arm.

<Means for solving the problems> The present invention provides a cleaner that solves the above-mentioned conventional problems, and its structure includes a lens with two curved surfaces whose longitudinal section is bent into a dogleg shape. a fixed lamp frame body, a guide shaft extending in the left-right axis direction parallel to the left-right direction of the lens whose both ends are fixed at the top and bottom positions of the lamp frame body, and the lamp frame adjacent to each of the guide shafts with parallel axes. A feed screw that is rotatably supported on a body, a drive shaft that is connected to one end of each of the feed screws via a gear mechanism, and a reversible motor that is fixed to the lamp frame and rotates the drive shaft in forward and reverse directions. a screw rotation drive mechanism;
slidably guided by each of the guide shafts;
and a feed nut screwed onto the feed screw, and an arm pivotally supported by each of the feed nuts so as to be swingable about a vertical axis, and one end of which is constantly pulled in a direction close to the feed nut by a spring. ,
a blade that contacts the surface of the lens and has a dogleg shape corresponding to the two-curved shape of the lens;
A wiper arm whose upper and lower ends are attached to the other end of the arm, a wiper arm storage recess formed at one end of the lens in which the wiper arm is stored, the wiper arm storage position, and a wiper arm opposite to the wiper arm storage position. The wiper arm includes a wiper arm retracted end detection switch and a wiper arm forward end detection switch which are operated by the nut to control the reversible motor at the forward end position.

<Function> With the above configuration, it is possible to wipe dirt from the two curved surfaces of the lens by the left and right reciprocating movement of the wiper arm. The wiper arm is retracted and is retracted from the effective surface of the lens to prevent interference with lamp illumination and improve appearance.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 5. In FIG. 1, reference numeral 10 indicates an example of an automobile lamp to which the present invention is applied, specifically a rear combination lamp. 11 is a lamp frame body, and 12 is a lens. This lens 1
2 has a "dog"-shaped cross section. 18 is a wiper arm that moves back and forth in the left-right direction along the surface of the lens 12.

The mechanism for reciprocating the wiper arm 18 in the left-right direction will be explained with reference to FIGS. 2 to 5.
2 to 4, bearings 14a, 14b are provided at both upper and lower ends of the lamp frame 11, and guide shafts 15a, 15b in the left-right axis direction parallel to the left-right surface of the lens 12 are attached to the bearings 14a, 14b.
are fixed, and feed screws 16a, 16b are rotatably supported on axes parallel to the guide shafts 15a, 15b.

A motor 26 capable of forward and reverse rotation is provided at one end (the right end in the drawing) of the lamp frame 11, and a drive shaft 27 rotated by the motor 26 via a spur gear 29, and the drive shaft 27 and the feed screw 16a are connected to each other. ,1
6b through bevel gears 28a and 28b.

A feed nut 1 is attached to the feed screws 16a and 16b.
9a and 19b are screwed together. The feed nuts 19a, 19b are slidably guided by the guide shafts 15a, 15b. The feed nut 19
a, 19b, bent arms 24a, 24b are connected to the rotating shafts 25a, 25 with rotating shafts 25a, 25 having axes orthogonal to the guide shafts 15a, 15b as fulcrums.
The arm 2 is pivotably supported around the axis of the arm 5b.
4a, 24b rear ends and feed nuts 19a, 19b
A tension spring 30 is latched between.

18 is a wiper arm. This wiper arm 18 extends in an axial direction perpendicular to the guide shaft 15a, and has a blade 17 in contact with the surface of the lens 12.
have. The wiper arm 18 and blade 17 are also formed in a dogleg shape corresponding to the dogleg shape of the lens 12.

The wiper arm 18 has its lower end pivotally attached to the tip of the lower arm 24b via a rotating shaft 21 parallel to the guide shaft 15b so as to be pivotable about the rotating shaft 21, and its upper end It is detachably engaged with the tip of the side arm 24a via an engagement piece 22. Therefore, wiper arm 1
8 is a feed screw 16 driven by forward and reverse rotation of the motor 26;
It reciprocates in the left-right direction by feed nuts 19a and 19b, which are fed and moved by forward and reverse rotations of a and 16b.

Therefore, the original position of the wiper arm 18 that reciprocates in the left-right direction is one of the left and right ends, and the forward end is the other end. In the illustrated example, the right end side where the motor 26 is installed is the forward end, and the opposite right end side is the original position and the retracted position.

As described above, the mechanism for switching the reciprocating movement of the wiper arm 18 that moves in the left-right direction is provided with the forward end detection switch 32 in which the feed nut 19a abuts on the bearing 14a on the upper right end side, and the feed nut 19a on the bearing 14a on the upper left end side. The configuration is such that a retraction end detection switch 31 is provided to electrically control forward/reverse rotation and stop of the motor 26.

The configuration for storing the wiper arm 18 at its left end original position is as follows. A recess 35 for storing the wiper arm 18 is formed at the left end of the lens 12, and contact parts 33a, 33b formed on the arms 24a, 24b are formed on the lamp body 11 near the upper and lower bearings 14a, 14b on the left end side. arm 24 in contact with
Stoppers 34a, 34 for rotating a, 24b
This is a structure in which b is provided.

Next, the operation of the above configuration will be explained. The original position of the wiper arm 18 is as shown in FIG.
The contact portions 33a, 33b contact the stopper 34,
The arms 24a and 24b are rotated clockwise about the rotation shafts 25a and 25b, and the wiper arm 1
8 is housed in a recess at the left end of the lens 12. At this time, the storage end detection switch 31
The start switch (not shown) that is turned ON by being pressed by 9a is turned OFF, so the motor 26 is turned on.
does not rotate.

When the start switch is turned on, the motor 26 rotates the forward twist screws 16a and 16b in the forward direction. This allows the feed nuts 19a and 19b located at the left end to
moves left and right. This feed nut 19a,
At the time of the intended movement of arm 19b to the right, arm 24a,
Since the contact portions 33a and 33b of the wiper arm 24b are separated from the stopper 34, the wiper arm 18, which had been stored in the recess 35, is rotated counterclockwise by the tension spring 30, and is pulled out to the surface of the lens 12.
Thereafter, the blade 17 comes into contact with the surface of the lens 12 and moves forward to the right. The rightward movement of the feed nut 19a moves it away from the storage end detection switch 31, but the storage end detection switch 31 remains in the ON state. When the wiper arm 18 moves to the forward end, the feed nut 19a activates the forward end detection switch 3.
2 to turn it on, and in conjunction with this, the storage end detection switch 31 turns off. Therefore, when the forward end detection switch 32 is turned on, the motor 26 is rotated in the reverse direction, and the feed nuts 19a, 19b are moved to the left toward their original positions. When the wiper arm 18 moves close to the original position, the contact portions 33a and 33b contact the stopper 30, and the arms 24a and 24b are rotated clockwise to store the wiper arm 18 in the recess 35. At the retracted position of the wiper arm 18, the feed nut 19a turns on the retracted end detection switch 31, and in conjunction with this, turns on the forward end detection switch 32.
Turn it off. The motor 26 is then switched to normal rotation again, and the wiper arm 18 is moved toward the forward end and repeats the reciprocating movement. If you want to stop it, turn off the start switch, but wiper arm 18
The operation stops when it reaches the storage end. Further, although the above embodiment is applied to a rear combination lamp, the invention can also be applied to a headlamp.

<Effects of the invention> As described above, according to the invention, both upper and lower ends of the wiper arm are attached to an arm that is guided by a guide shaft, swingably supported by a feed nut screwed into a feed screw, and constantly tensioned by a spring. is attached, so the blade always slides into contact with the two curved lens surfaces bent in a dogleg shape with a moderate contact pressure.
By reciprocating the wiper arm from side to side, the two curved lens surfaces can be reliably wiped without leaving anything unwiped.

In addition, when the wiper arm is not activated, the wiper arm is stored in the storage recess at the side end of the lens, so the wiper arm is not located on the effective surface of the lens, preventing the wiper arm from interfering with the lamp illumination, and improving the appearance. It's doing well.

Furthermore, the guide shaft, the feed screw, the reversible motor that is the drive mechanism for the feed screw, the wiper arm storage end detection switch and the wiper arm forward end detection switch that control this reversible motor are all located in the lamp frame, so the wiper arm It consists of a lamp frame with a unitized bicurved lens that incorporates the drive mechanism, and when it is assembled into a vehicle, it is only necessary to connect the electrical lead wire with a plug, reducing the number of assembly steps and making lamp assembly easier. This has the advantage of significantly shortening the time required.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the present invention, Fig. 2 is a front view of the wiper arm operating mechanism of the cleaner according to the present invention, Fig. 3 is a view taken in the direction of the arrow in Fig. 2, and Fig. 4 is Fig. 2-
5 is a sectional view taken along the arrow in FIG. 3, and FIG. 6 is a perspective view of a conventional cleaner. 11... Lamp frame, 12... Lens, 14
a, 14b... Bearing, 15a, 15b... Guide shaft, 16a, 16b... Feed screw, 17... Blade, 18... Wiper arm, 19a, 19b...
...Feed nut, 26...Motor, 31...Retraction end detection switch, 32...Advance end detection switch.

Claims (1)

[Scope of utility model claims] a lamp frame on which a two-curved lens with a vertical section bent in a dogleg shape is fixed; and a guide shaft extending in the left-right axis direction parallel to the left-right direction of the lens, both ends of which are fixed at the top and bottom positions of the lamp frame. a feed screw that is close to each of the guide shafts with parallel axes and is rotatably supported on the lamp frame; a drive shaft that is connected to one end of each of the feed screws via a gear mechanism and fixed to the lamp frame; a feed screw rotation drive mechanism comprising a reversible motor that rotates the drive shaft in forward and reverse directions; a feed nut slidably guided by each of the guide shafts and screwed onto the feed screw; an arm that is pivotably supported on a feed nut so as to be swingable around a vertical axis, and whose one end is always pulled in a direction close to the feed nut by a spring; and a blade that contacts the surface of the lens, and has two curved surfaces of the lens. a wiper arm having a dogleg shape corresponding to the shape of the lens, and having both upper and lower ends attached to the other end of the arm; a wiper arm storage recess formed at one end of the lens in which the wiper arm is stored; and a wiper arm storage recess formed at one end of the lens. location and,
A wiper arm storage end detection switch and a wiper arm forward end detection switch operated by the nut to control the reversible motor at a wiper arm forward end position opposite to the wiper arm storage position. lamp cleaner.