JPH0116183Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention converts rotational motion, tilting motion, etc. (hereinafter simply referred to as rotation) into linear reciprocating motion (hereinafter referred to as "rotation").
It is simply called reciprocating movement. ) and conversely convert reciprocating movement into rotational movement.

[Conventional technology]

This type of rotating and reciprocating movement conversion device is generally
The device includes a rotating member rotatably attached to a support body and a reciprocating member attached to the support body so as to be reciprocatingly movable, and the rotating member and the reciprocating member are engaged with each other. By rotating the member, the reciprocating member can be reciprocated, and conversely, by reciprocating the reciprocating member, the rotating member can be rotated.

[The problem that the idea aims to solve]

However, in conventional rotation and reciprocating movement converting devices, the rotating member is rotatably attached to the support, while the reciprocating member is also attached to the support so that it can reciprocate. The center of engagement between the moving member and the reciprocating member is the rotation of the rotating member, and as the reciprocating member moves back and forth, the center of the rotating member side is on a circular arc, and the center of the reciprocating member side is on a straight line. Try to move each. For this reason, if the rotating member and the reciprocating member are simply engaged without any margin or clearance, the rotating member will restrict the reciprocating movement of the reciprocating member, and conversely, the reciprocating member will restrict the reciprocating member. The rotating member and the reciprocating member interfere with each other, and an unreasonable force is applied between them, resulting in play.

The purpose of the present invention is to provide a rotation system that improves the above-mentioned drawbacks.
An object of the present invention is to provide a reciprocating movement conversion device.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a notch in a direction perpendicular to the rotation axis of the rotary member in a rotary member rotatably attached to a support body, and a reciprocating member is provided in the notch in a direction perpendicular to the rotation axis of the rotary member. an adjusting screw supported by the support body is screwed into the nut, and engaging grooves are provided on both sides of the nut to engage with both side edges of the notch. , is characterized in that the two opposing faces of the engagement groove are formed in a chevron shape, close to each other at the center and separated at both ends.

[Effect]

The rotating member of the rotating and reciprocating movement conversion device configured as above is rotated to reciprocate the nut in the axial direction of the adjusting screw, or the nut is reciprocated in the axial direction of the adjusting screw. When the rotary member is moved and rotated, both edges of the notch in the rotary member slide in the engagement groove of the nut.
Moreover, both sides of both side edges of the notch of the rotating member and both sides of the engagement groove of the nut are always in contact with each other. Therefore, no excessive force is applied to the rotating member and the nut, and no play occurs.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the rotation and reciprocation conversion device according to the present invention will be described with reference to the accompanying drawings.

In this embodiment, the rotating and reciprocating movement converting device of the present invention is used as an optical axis adjusting device for two left and right headlamps.

In the figure, 102 and 103 are a support case and a support plate as supports. This support plate 103 is provided with a wire fixing portion 131 and a stopper 132 for regulating the rotation range of a rotation lever 105, which will be described later.

105 is a pin 104 attached to the support plate 103.
This is a rotary lever as a rotary member that is rotatably attached. One end of this rotating lever 105 is bent at a right angle, that is, parallel to the axial direction of the pin 104, and a rectangular notch 15 is formed in the bent part.
5 is the rotation shaft of the rotation lever 105 (the pin 1
04), and this notch 1
Nut engaging portions 152 are provided on both side edges of 55. A wire engaging portion 1 is attached to the bent portion of the rotating lever 105.
51 will be provided.

101 is a lamp unit, and this lamp unit 101 has a sealed beam lamp 111 and a support frame 112 provided on the outer periphery thereof.

Adjustment screws 181 are rotatably supported at the upper center, lower left, and lower right of the support case 102 and the support frame 112 of the lamp unit 101 in a direction perpendicular to the axial direction of the pin 104, respectively. Then, a nut 106 (described later) is screwed into the adjustment screw 181 at the upper center, and screw mountings 184 are screwed into the adjustment screw 181 at the lower left and lower right, respectively, and the support frame 112 and the support case 102 are connected. A countersunk washer 182 and a spring 183 whose edges are bent toward the support case 102 are interposed therebetween. As a result, the head of the adjuster screw 181 and the countersunk washer 182 clamp the support frame 112,
Further, due to the elastic force of the spring 183, the lamp unit 101 is supported by the support case 102 so as to be tiltable in the vertical direction.

In addition, in the figure, 109 is a holder, which includes a cylindrical part 191 that is inserted into a through hole of the support case 102, a contact part 192 that comes into contact with the support case 102, a protrusion 193 for preventing the spring 183 from slipping, and a holder. It consists of a through hole 194 for inserting the screw 181.

Reference numeral 106 designates a nut as a reciprocating member screwed onto the adjuster screw 181 in the upper center portion. They are provided orthogonally to each other so that the engagement groove 161 of the nut 106 and both side edges (nut engagement portions) 152 of the notch 155 of the rotary lever 105 can be slid, and the nut 106 can be rotated around the adjusting screw 181. Non-rotatably engaged. That is, the width of the engagement groove 161 is made slightly larger than the plate thickness of the part where the notch 155 is provided, so that it can be slid, and the opposing end surfaces of both side edges 152 of the notch 155 are in contact with the bottom of the engagement groove 161. Cannot be rotated.

Both sides 161 of the engagement groove 161 of the nut 106
a and 161b are formed into linear mountain shapes that are close to each other at the center and separated at both ends.

100 is an optical axis adjustment mechanism, and this optical axis adjustment mechanism 1
00 covers the wire 171 from the dial type optical axis adjustment operation section 107 with an outer case 172, and fixes a nipple to the end of the wire 171.
The distal end of the outer case 172 of the wire 171 is fixed to the fixed piece 131 of the support plate 103 using a locking tool 133 and a synthetic resin nut 134, and the nipple at the distal end of the wire 171 is connected to the wire engagement of the rotary lever 105. It is locked to the joining part 151.

Reference numeral 154 is a connecting rod having a feed screw 153, and both ends of this connecting rod 154 are pivotally supported on the left and right headlamp rotation levers 105, respectively.

Since the rotating and reciprocating movement conversion device of the present invention in this embodiment has the above-described configuration, the wire 171 can be pulled in the direction of the solid line arrow by turning the dial of the optical axis adjustment unit 107, or When pushed in the direction of the arrow, the left and right headlamp rotation levers 105 are connected to the pin 1 via the connecting rod 154.
04 as the center, in the direction of the solid line arrow or the direction of the two-dot chain arrow, and as the rotation lever 105 rotates, the adjustment screw 181 in the upper center part moves backward and forward via the nut 106, and the left and right The lamp unit 101 is tilted upward or downward relative to the support case 102 to adjust the optical axis.

The rotating and reciprocating movement converting device of the present invention in this embodiment has two chevron-shaped surfaces 161a of an engagement groove 161 of a nut 106 as a reciprocating member on both side edges of a notch 155 of a rotating lever 105 as a rotating member. ，
161b, the rotating lever 105 and the nut 106 are engaged without interfering with each other. Therefore, in optical axis adjustment, the rotation of the rotation lever 105 can be easily converted into reciprocating movement of the nut 106 without the rotation lever 105 and the nut 106 interfering with each other. That is, wire 1
Rotating lever 10 by pulling or pushing 71
5 around pin 104, nut 1
06 reciprocates, and the center of engagement between the notch 155 of the rotary lever 105 and the engagement groove 161 of the nut 106 moves toward the rotary lever 105 as the rotary lever 105 rotates and the nut 106 reciprocates. The center of the nut 106 side tries to move along a straight line in the axial direction of the adjusting screw 181. At this time, the engagement groove 16 of the nut 106 is inserted into both side edges of the notch 155 of the rotary lever 105.
1 are slidably engaged with each other, both edges of the notch 155 of the rotary lever 105 slide in the engagement groove 161 of the nut 106, and the rotary lever 105
The engagement center on the side is shifted from the engagement center on the nut 106 side (on the locus of the reciprocating movement of the nut 106), so that no excessive force is applied to the rotation lever 105 and the nut 106, and the rotation of the rotation lever 105 is prevented. Natsuto the movement 1
06 can be converted into a round trip. Also,
Both sides 161a, 1 of the engagement groove 161 of the nut 106
61b has a chevron shape that is close to each other in the center and separated at both ends, so even if the rotary lever 105 rotates and the nut 106 moves back and forth, both sides of both side edges 152 of the notch 155 of the rotary lever 105 and the nut 106 Both surfaces 161a, 161 of the engagement groove 161 of
If the contact point with b is shifted, the rotating lever 105
Both sides of both side edges 152 of the notch 155 and the nut 10
Both surfaces 161a and 161b of the engagement groove 161 of No. 6 are always in contact with each other, so that no backlash occurs.

In the above-mentioned embodiment, two headlamps on the left and right sides have been described, but the same applies to the case of one or four headlamps.

Further, the lamp unit 101 is composed of a sealed beam 111 and a support frame 112, but in the case of a metal back type, the flange portion of a metal reflecting mirror can be used as the support frame 112.

Furthermore, in the embodiment, the holder 10
9 was used, but without using the holder 109, the adjuster screw 18 was attached to the support case or the vehicle body.
A through hole with a diameter larger than the diameter of 1 and a protrusion for preventing the spring 183 from slipping may be provided.

Further, the optical axis adjustment section 107 may be of a lever type or an automatic type having a suspension structure, in addition to the above-mentioned dial type. Alternatively, the rotary lever 105 may be rotatably attached directly to the support case 102 without using the support plate 103.

Note that, as in the other embodiments described above, if the support case 102 is used, the adjusting device including the lamp unit can be assembled in advance, making it easier to attach it to the vehicle body. But, of course,
The present invention is not limited to such examples or only to the illustrated examples.

Furthermore, in the embodiments described above, the nut 106
Both surfaces 161a and 161b of the engagement groove 161 have a linear chevron shape, but an arcuate chevron shape (both surfaces 16
The radius of curvature of 1a and 161b may be the same or different. ) may be formed.

The above-mentioned embodiment is an example in which the headlamp optical axis adjustment device is used, but the rotation and reciprocating movement conversion device of the present invention adjusts the irradiation angle of the headlamp after the headlamp is attached to the vehicle body. It may also be used in vehicle headlights that can be adjusted. in this case,
For example, a lamp body (support body) is fixed to the vehicle body via a bracket, and a reflector (rotating member) is rotatably attached to the lamp body using a rotation fulcrum mechanism.
A notch is provided in a bracket fixed to the rotating end side of the reflecting mirror in a direction perpendicular to the rotating axis of the reflecting mirror, and a nut serving as a reciprocating member is slidably engaged with the notch, and the nut is inserted into the bracket. An adjusting screw supported by the lamp body is screwed into the nut, engagement grooves are provided on both sides of the nut to engage with both side edges of the notch, and two opposing engagement grooves are provided on both sides of the nut.
The surfaces are formed into a chevron shape that is close to each other in the center and separated at both ends. When the adjuster screw is screwed in or unscrewed, the nut reciprocates in the axial direction of the adjuster screw, the reflecting mirror rotates about the pivot mechanism, and aiming adjustment is performed. At this time, as in the above embodiment, no excessive force is applied to the nut or bracket.
Moreover, there is no backlash, and the reciprocating movement of the nut can be converted into rotation of the reflecting mirror.

The present invention is applicable to headlight units that include a reflector, in addition to those that adjust the optical axis of the lamp unit by moving the nut back and forth, and those that perform aiming operations by tilting the reflector. The entire unit is a tilting member that tilts with respect to the vehicle body, or the headlight unit holding member is a tilting member that tilts with respect to the vehicle body, and the tilting member and the headlight unit are tilted integrally. The present invention can also be applied to such cases, and the essence of the present invention remains unchanged even in these cases.

[Effect of idea]

As described above, in the present invention, the rotation of the rotating member is converted into the reciprocating movement of the reciprocating member, and conversely, the reciprocating movement of the reciprocating member is converted into the rotation of the rotating member, without any force or play. be able to.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the rotating and reciprocating movement converting device of the present invention, and FIG. 1 is a plan view of a headlamp optical axis adjustment device using the rotating and reciprocating converting device of the present invention, and FIG. 3 is a side view, FIG. 3 is an enlarged plan view, FIG. 4 is a sectional view taken along the line -- in FIG. 3, and FIG. 5 is an exploded perspective view of main parts. 100... Optical axis adjustment mechanism, 101... Lamp unit, 102... Support case, 103... Support plate, 104... Pin, 105... Rotating lever, 151... Wire engaging portion, 152... Nut Engaging portion, 155... Notch, 106... Nut, 1
61...Engagement groove, 107...Optical axis adjustment section, 171
...Wire, 181...Adjust Screw.

Claims (1)

[Scope of utility model registration request] a support body, a rotation member rotatably attached to the support body, a reciprocating member attached to the support body so as to be movable back and forth in a direction perpendicular to a rotation axis direction of the rotation member; a notch provided in the rotating member in a direction perpendicular to the rotation axis direction of the rotating member and the reciprocating direction of the reciprocating member; and a notch provided on both sides of the reciprocating member to engage with both side edges of the notch. 1. A rotating and reciprocating movement converting device comprising: an engaging groove, wherein two opposing surfaces of the engaging groove are formed in a chevron shape close to each other at the center and separated from each other at both ends.