JP6771219B2 - Optical axis adjustment tool - Google Patents

Description

The present invention relates to an optical axis adjusting tool for adjusting the optical axis of a vehicle headlight (hereinafter referred to as "headlight") such as an automobile headlamp or fog lamp or a motorcycle headlamp. In particular, the present invention relates to an optical axis adjusting tool capable of reliably and easily adjusting the optical axis of a headlight even in a narrow work space.

Conventionally, it has been known to adjust the optical axis of a headlight within a predetermined reference value in an automobile inspection or the like in order to secure the antiglare property of an oncoming vehicle.

The optical axis adjusting work of the headlight is generally performed by operating an optical axis adjusting mechanism composed of an aiming screw or the like provided on the back side of the headlight by using a tool such as a screwdriver.

The specific optical axis adjustment mechanism differs depending on the type of lamp (halogen lamp, LED lamp, HID lamp), the presence or absence of a leveling device, etc., but in general, the swing provided on the back surface of the reflector in the headlight. It consists of a central pivot, an aiming screw for vertical adjustment, and an aiming screw for left and right adjustment. Of these, the crown gear, etc., which is integrally provided with the aiming screw, is rotated by a tool such as a driver. By doing so, the direction of the reflector is adjusted to adjust the optical axis of the headlight.

By the way, since it is necessary to adjust the optical axis of the headlight while the headlight is attached to the vehicle, it is difficult for a tool such as a screwdriver to reach the aiming screw depending on the mounting position of the headlight on the vehicle. It may be difficult to engage the driver with the crown gear of the aiming screw.

Therefore, in Patent Document 1 below, a screw rotation unit that functions as an adapter is provided between the crown gear of the aiming screw and the driver, and the rotational force is applied from the driver even if the driver does not directly mesh with the crown gear. , The one that is transmitted to the crown gear via the screw rotation unit is known.

However, if a separate adapter called a screw rotation unit is provided between the driver and the crown gear, the number of meshing points increases in the middle of the transmission path that transmits the rotational operation force, and the increase in the number of meshing points causes backlash. The amount of rattling such as the above may increase, making it difficult to finely adjust the optical axis adjustment amount.

Therefore, as much as possible, the driver and the crown gear of the aiming screw are required to be directly meshed with each other.

Further, Patent Document 2 below provides a guide that guides the driver to the meshing position so that the driver can easily mesh with the crown gear even if the crown gear of the aiming screw is in a recessed position of the vehicle. What is provided is known.

JP-A-2008-243604 Japanese Unexamined Patent Publication No. 10-119638

By the way, when adjusting the optical axis of such a headlight, as described in Patent Document 2 above, since the aiming screw is located at a deep position of the vehicle, the operator uses a long screwdriver or the like. By using it, the crown gear of the aiming screw is engaged with the cutting edge of the tip of the driver.

At this time, normally, the long driver is engaged with the crown gear through a through hole or the like provided in the vehicle body, but at that time, the operator confirms the meshing state of the long driver and the crown gear through the through hole or the like. To do.

However, if the shaft diameter of the long screwdriver is large, the gap between the long screwdriver and the through hole becomes small, so that there is a problem that it is difficult for the operator to confirm the meshed state of the tip portion of the screwdriver. In addition, if the shaft diameter of the long screwdriver is large in this way, the gap (escape) between the long screwdriver and the through hole is reduced, which makes it difficult for the operator to finely adjust the direction of the screwdriver, and the optical axis can be adjusted. There is also a problem that workability deteriorates.

Therefore, it is conceivable to solve these problems by reducing the shaft diameter of the long screwdriver. However, when a driver having a small shaft diameter is used in this way, a new problem arises.

The problem is that when a long screwdriver with a small shaft diameter is engaged with the crown gear of the aiming screw, the shaft of the screwdriver rattles greatly.

That is, when the cutting edge of the tip of the driver is meshed with the crown gear of the aiming screw and the rotation operation is performed, usually, in order to prevent the tip of the driver from wobbling, a guide support portion is provided near the aiming screw. It is provided to lightly contact and support the tip of the driver, but at this time, if the tip of the driver is thin, the shaft of the driver will rattle in the guide support, and stable rotation operation will not be possible.

In this way, if the shaft of the driver is loose and the rotation operation cannot be performed stably, there is a risk that the driver will run idle or the guide support part will be scraped and deformed by the cutting edge of the tip of the driver. There is.

The present invention has been made in view of these points, and an object of the present invention is to use an optical axis adjusting tool for adjusting the optical axis of the headlight by operating the optical axis adjusting mechanism of the headlight, and a narrow work space. For optical axis adjustment, which improves the visibility of the work position and the operability of the tool, prevents the axis of the tool from rattling even during rotational operation, and enables stable optical axis adjustment work. To provide tools.

In order to achieve the object, in the present invention, in the optical axis adjusting tool for adjusting the optical axis of the headlight by operating the optical axis adjusting mechanism of the headlight mounted on the vehicle from the outside of the vehicle, the optical axis adjusting work. Occasionally, the operating base is located outside the vehicle, the tip is engaged with the optical axis adjusting mechanism inside the vehicle, and the intermediate portion is provided with a long shaft-shaped member that passes through a through hole or the like of the vehicle body. The long shaft-shaped member adopts a structure in which the intermediate portion is formed thin and the tip portion is formed thicker than the intermediate portion.

Specifically, the first invention is an optical axis adjusting tool for adjusting the optical axis of the headlight by operating the optical axis adjusting mechanism of the headlight set inside the vehicle from the outside of the vehicle. The optical axis adjusting tool has an operating base located outside the vehicle, a tip located inside the vehicle and meshing with the optical axis adjusting mechanism, and the operating base and the tip during the optical axis adjusting work. It is provided with a long shaft-shaped member having an intermediate portion provided between them and passing through a through hole of the vehicle body, and the tip portion is a cross-shaped cutting edge formed by recessing four groove portions. The shaft-shaped member has a portion and a columnar contact peripheral surface portion, and the shaft diameter of the intermediate portion is formed to be small, and the shaft diameter of the contact peripheral surface portion of the tip portion is smaller than that of the intermediate portion. It is characterized by being thickly formed.

According to this configuration, in the shaft-shaped member of the optical axis adjusting tool, the shaft diameter of the intermediate portion is formed to be small, and the shaft diameter of the contact peripheral surface portion of the tip portion is formed to be large. A large gap can be secured between the intermediate portion and the through hole of the vehicle body, and the tip portion of the shaft-shaped member is less likely to rattle without a gap.

As a result, a large gap can be secured between the shaft-shaped member of the optical axis adjusting tool and the through hole, and the operator can check the meshing state of the tip portion through the gap and have a shaft shape. The orientation of the members can be finely adjusted. Further, since the tip of the shaft-shaped member of the optical axis adjusting tool is less likely to rattle without a gap, stable rotation operation can be performed and stable optical axis adjustment work can be performed.

In the second invention, a guide support portion is provided in the vicinity of the meshed portion of the optical axis adjusting mechanism, and the shaft diameter of the contact peripheral surface portion of the tip portion is the dimension of the support space of the guide support portion. It is characterized in that it is set so as to be substantially the same.

According to this configuration, the shaft diameter of the contact peripheral surface portion of the tip portion of the shaft-shaped member substantially matches the dimension of the support space of the guide support portion, so that the tip portion of the shaft-shaped member is surely connected to the guide support portion. The shaft-shaped member can be stably rotated without rattling.

Therefore, according to the present invention, the shaft-shaped member of the optical axis adjusting tool can be rotated more reliably and stably, so that the optical axis adjusting work can be performed reliably and quickly.

In the third invention, a cross-shaped cutting edge portion is formed at the tip end portion of the shaft-shaped member, and the thickness of the cutting edge portion of the cross-shaped cutting edge portion is set by JIS standard B4633 (cross screwdriver). It is characterized in that it is formed thinner than the thickness of the cut edge.

According to this configuration, a cross-shaped cutting edge portion is formed at the tip end portion of the shaft-shaped member, and the cutting edge portion of the cutting edge portion is formed thinner than the cutting edge of a standard screwdriver configured by the JIS standard.

Therefore, the cutting edge of the cross-shaped cutting edge can be deeply meshed with the meshed portion of the optical axis adjusting mechanism, for example, the crown gear of the aiming screw, to the vicinity of the tooth bottom of the crown gear. As a result, the rotational operation force of the shaft-shaped member can be reliably transmitted to the meshed portion of the optical axis adjusting mechanism.

Therefore, according to the present invention, the optical axis adjusting mechanism can be more reliably rotated by the shaft-shaped member of the optical axis adjusting tool, so that the optical axis adjusting work can be performed more efficiently.

As described above, according to the present invention, a large gap can be secured between the shaft-shaped member of the optical axis adjusting tool and the through hole or the like, and the operator can secure a large gap through the gap of the tip portion. It is possible to check the meshed state and finely adjust the orientation of the shaft-shaped member. Further, since the tip of the shaft-shaped member of the optical axis adjusting tool is less likely to rattle without a gap, stable rotation operation can be performed and stable optical axis adjustment work can be performed.

Therefore, with the optical axis adjustment tool that adjusts the optical axis of the headlight by operating the optical axis adjustment mechanism of the headlight, the visibility of the work place and the tool operability are improved even in a narrow work space. The optical axis adjustment work can be performed stably by preventing the tool shaft from rattling even during the rotation operation.

It is an overall view of the optical axis adjustment tool which concerns on embodiment of this invention. It is a front view and the side view of the tip part of the bit member of an optical axis adjustment tool. FIG. 2 is a cross-sectional view taken along the line XX of FIG. It is an overall view when the optical axis adjustment mechanism of a headlight is operated by the optical axis adjustment tool of Embodiment 1. FIG. It is a top view of the partial cross section which shows the state which the bit member of the optical axis adjustment tool is passed through the through hole of a car body. It is a side view which shows the state which the tip part of the bit member is meshed with the crown gear of the vertical adjustment aiming screw. It is a top view of the partial cross section which shows the state which the cutting edge part of the tip part of a bit member is meshed with a crown gear. It is a top view of the partial cross section corresponding to FIG. 7 which shows the state in which the cutting edge portion of a normal screwdriver is meshed with a crown gear.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of preferred embodiments is merely exemplary and is not intended to limit the invention, its applications, or its uses.

(Embodiment 1)
FIG. 1 is an overall view of the optical axis adjusting tool according to the first embodiment of the present invention, and FIG. 2 is a bit member of the optical axis adjusting tool.
A front view and a side view of the tip portion of the axial member of the present invention), and FIG. 3 is a cross-sectional view taken along the line XX of FIG.

Further, FIG. 4 is an overall view when operating the optical axis adjusting mechanism of the headlight with the optical axis adjusting tool of the first embodiment, and FIG. 5 is a bit member of the optical axis adjusting tool passed through a through hole of the vehicle body. A plan view of a partial cross section showing the state of the bit member, FIG. 6 is a side view showing a state in which the tip end portion of the bit member is meshed with the crown gear of the aiming screw for vertical adjustment, and FIG. A plan view of a partial cross section showing a state in which the cutting edge portion is meshed with the crown gear, FIG. 8 is a partial cross section corresponding to FIG. 7 showing a state in which the cutting edge portion of a normal screwdriver is meshed with the crown gear. It is a plan view.

As shown in FIG. 1, the optical axis adjusting tool T of the present embodiment is composed of a long bit member (axial member of the present invention) 1 and a handle member 2 to which the bit member 1 is mounted. There is.

First, the handle member 2 is a well-known spherical handle, and will be briefly described. The handle member 2 is composed of a substantially spherical grip portion 21, a chuck portion 22 for mounting the bit member 1, and a ratchet mechanism (not shown) provided inside the chuck portion.

Since the handle member 2 has a built-in ratchet mechanism, when the bit member 1 is attached and the optical axis is adjusted, the bit member 1 can be rotated without having to change the handle member 2. .. Therefore, the operator can easily perform the optical axis adjustment work.

Further, although not shown, by providing a mark such as a scale on the chuck portion 22 or the like, it is possible to use it as a guide for the adjustment amount of the optical axis and the adjustment direction (rotation direction) during the optical axis adjustment work. ..

Further, since the bit member 1 can be removed from the handle member 2 by the chuck portion 22, the same bit member 1 can be replaced with another handle member or another rotation transmission operating member.

Next, the bit member 1 will be described. The bit member 1 is made of alloy steel, and has an operating base 11 mounted on the handle member 2, a tip 12 that meshes with the optical axis adjusting mechanism of the head ride, and the operating base 11 and the tip 12. It is composed of an intermediate portion 13 provided between the two, and a long rod-shaped shaft-shaped body composed of the intermediate portion 13.

Of these, the tip portion 12 is processed to have a hardness higher than that of the other portions to prevent the tip portion 12 from spilling.

The operation base portion 11 described above is composed of a hexagonal columnar shaft portion, and a slit groove 11b extending in the circumferential direction is formed on the base end portion 11a side. With this configuration, the operation base 11 can be mounted and fixed to the chuck portion 22 of the handle member 2.

The above-mentioned intermediate portion 13 is composed of a columnar shaft portion. The shaft diameter d3 of the intermediate portion 13 is set to be smaller than the shaft diameter d2 of the tip portion 12 and smaller than the operating base portion 11. For example, it is conceivable to set the shaft diameter d3 to 5 mm. By reducing the shaft diameter d3 of the intermediate portion 13 in this way, as will be described later, the operability of the tool T and the operability of the tool T when passing through the through hole H (see FIG. 4) of the vehicle body B in the optical axis adjustment work , The visibility of the meshed portion can be improved, and the workability of the optical axis adjustment work can be improved.

The above-mentioned tip portion 12 is also composed of a columnar shaft portion. The shaft diameter d2 of the tip portion 12 is set to be thicker and larger than the shaft diameter d3 of the intermediate portion 13. For example, it is conceivable to set the shaft diameter d2 to 6 mm. By increasing the shaft diameter d2 of the tip portion 12 in this way, as will be described later, the stability of the rotation operation of the optical axis adjustment can be improved, and the workability of the optical axis adjustment work can be improved.

Further, a cross-shaped cutting edge portion 31 is provided at the tip of the tip portion 12, and the cutting edge portion 31 is used as a crown gear G of an aiming screw C3 which is a meshed portion of an optical axis adjusting mechanism C described later (FIG. It is configured to mesh with (see 6).

Further, an inclined tapered surface 32 is formed on the intermediate portion 13 side of the tip portion 12. As a result, the change in the shaft diameter from the intermediate portion 13 to the tip portion 12 is made smooth, and stress concentration or the like is prevented from occurring in this portion. Further, even when the bit member 1 is pulled out from the vehicle after the optical axis adjusting work is completed, the tip portion 12 is prevented from being caught by the vehicle body B or the like.

As an example, in this bit member 1, the shaft length L1 of the operation base 11 is set to 50 mm, the shaft length L2 of the tip portion 12 is set to 20 mm, and the shaft length L3 of the intermediate portion 13 is set to 230 mm. It is possible to set it to. With such an axial length, a considerably long bit member 1 can be obtained.

Next, the detailed structure of the tip portion 12 will be described with reference to FIGS. 2 and 3.

The tip portion 12 is a columnar contact peripheral surface portion 33 formed between the tapered portion 32 formed on the tapered surface, the cross-shaped cutting edge portion 31 provided at the tip, and the tapered portion 32 and the cutting edge portion 31. Consists of.

As described above, the tapered portion 32 is composed of a tapered peripheral surface having a gentle slope, and is smooth between the small diameter intermediate portion 13 and the large diameter tip portion 12 (contact peripheral surface portion 33). It is configured to connect to.

The above-mentioned contact peripheral surface portion 33 is formed of a columnar peripheral surface, and is configured to have a predetermined axial length L4. As will be described later, the contact peripheral surface portion 33 is configured to be lightly contacted and held by the guide support portion 5 (see FIG. 6) provided on the headlight R during the optical axis adjustment work.

The cutting edge portion 31 is formed in a substantially cross shape by the groove portions 41, which are recessed at four positions evenly in the circumferential direction. The shape of the cutting edge portion 31 is similar to that of a general cross screwdriver, but the detailed shape is different.

Generally, in the case of a cross screwdriver having a shaft diameter of 6 mm, the shape is determined according to JIS standard B4633 (cross screwdriver) H type No. 2, but the cutting edge 31 of the bit member 1 of this embodiment is of JIS standard. The length of the groove 41 ... Is shorter than that of the one, and the thickness of each cutting edge 42 ... Is formed thinner.

As described above, in the bit member 1 of the present embodiment, by shortening the length of the groove portion 41 ..., the axial length L4 of the above-mentioned contact peripheral surface portion 33 can be secured by a predetermined amount (for example, 7 mm). .. Further, by reducing the thickness of each cutting edge 42, the cutting edge portion 31 can be engaged deeper with the crown gear G (see FIG. 6) of the aiming screw C3. The details of these will be described later.

The cutting edge portion 31 of the bit member 1 of the present embodiment has a short groove portion 41 ... and a thin thickness of each cutting edge portion 42 .... Therefore, the radius of curvature R at the bottom of the groove portion 41 ... is also small, and the JIS standard. It has a radius of curvature (30 mm radius), but is formed with a radius of curvature R (for example, a radius of 15 mm) smaller than that.

However, even in the bit member 1 of the present embodiment, since the cutting edge portion 31 has a cross shape, the screw tightening operation can be performed. However, since the cutting edge 42 is thin and does not have the proof stress against a large tightening torque, it is desirable to avoid using it as a general driver as much as possible.

In the present embodiment, the handle member 2 and the bit member 1 are made of separate members, but of course, the handle member 2 and the bit member 1 are integrally formed to grip the shaft portion and grip like a general driver. The optical axis adjusting tool T may be configured as the tool including the parts.

Next, the optical axis adjusting work of the headlight R performed by using the optical axis adjusting tool T of the present embodiment will be described.

As shown in FIG. 4, an optical axis adjusting mechanism C for adjusting the optical axis is provided on the back surface of the headlight R installed at a predetermined position of the vehicle. Specifically, on the back surface of the light casing R1 constituting the headlight R, a pivot C1 which is a swing center of a reflector (not shown), a left / right adjustment aiming screw C2 located on the side thereof, and a position below the pivot C2. It is composed of an aiming screw C3 for vertical adjustment.

Of these, the left / right adjustment aiming screw C2 and the up / down adjustment aiming screw C3 are rotated by using the optical axis adjustment tool T of the present embodiment to move the reflector of the headlight R. Adjust the optical axis. R2 is the main headlight bulb of the headlight R.

Since the optical axis adjustment mechanism C such as the aiming screw C3 for vertical adjustment is installed inside the vehicle, specifically, in the engine room (not shown), the operator can adjust the vertical adjustment from the outside of the vehicle. The aiming screw C3 and the like are accessed by using a long bit member 1.

That is, the operator causes the long bit member 1 to enter the inside of the vehicle from the outside of the vehicle through the through hole H provided in the vehicle body B, and the tip portion 12 thereof is inserted into the inside of the vehicle through the through hole H provided in the vehicle body B, and the tip portion 12 thereof is moved to the vertical adjustment aiming screw C3. It is inserted so as to mesh with the left / right adjustment aiming screw C2.

By inserting the long bit member 1 in this way, the operation base 11 of the bit member 1 is located at the operation position outside the vehicle, and the intermediate portion 13 is positioned through the through hole H provided in the vehicle body. The tip portion is located at 12, and is located at a position where it meshes with the vertical adjustment aiming screw C3 and the left / right adjustment aiming screw C2 inside the vehicle.

When the long bit member 1 is inserted, the shaft diameter d3 (see FIG. 1) of the intermediate portion 13 is formed to be thin and small as described above, so that the workability of this insertion work is improved. Can be enhanced.

That is, as shown in FIG. 5, the long bit member 1 is inserted into the vehicle through the through hole H provided in the vehicle body B (shroud upper member or the like), and the dimension (diameter) D of the through hole H is D. If it is increased, the rigidity of the vehicle body and the like will decrease, so it cannot be increased too much. Therefore, when the shaft diameter of the bit member Z is made thick and large as shown by the virtual line Z while keeping the shaft diameter d2 of the tip portion 12, the gap S1 between the through hole H and the bit member Z is created. It gets smaller.

However, if the gap S1 is small in this way, the operator cannot confirm the tip of the bit member Z from the gap S1, so that it is difficult to visually recognize the meshed state of the tip of the bit member Z. Occurs.

Further, when the gap S1 is small as described above, it becomes difficult to finely adjust the orientation of the bit member Z, which causes a problem that the tool operability is also deteriorated.

On the other hand, in the bit member 1 of the present embodiment, as shown by the solid line, the shaft diameter d3 of the intermediate portion 13 is formed to be thin and small in diameter, so that a gap S2 is sufficiently provided between the bit member 1 and the through hole H. It can be secured, and the operator can sufficiently visually recognize the meshed state of the tip portion 12 of the bit member 1 from the gap S2.

Further, since the gap S2 can be sufficiently secured, the orientation of the bit member 1 can be finely adjusted, and the tool operability is not deteriorated.

As described above, by forming the shaft diameter d3 of the intermediate portion 13 of the long bit member 1 to be thin and small in diameter, the workability of the insertion work can be improved in this embodiment.

On the other hand, in the tip portion 12 of the long bit member 1, since the shaft diameter d2 is formed to be thick and large as described above, the bit is formed when it is meshed with the vertical adjustment aiming screw C3 or the like. The shaft of the member 1 does not rattle, and the rotation operation can be performed stably.

That is, as shown in FIG. 6, when the tip portion 12 of the long bit member 1 is meshed with the vertical adjustment aiming screw C3, the tip portion 12 of the long bit member 1 is used for vertical adjustment. It is inserted into the guide support portion 5 on the upper side of the aiming screw C3, and the cutting edge portion 31 of the tip portion 12 of the bit member 1 is engaged.

Here, the guide support portion 5 is formed of ribs erected on the light casing R1, and extends in the vertical direction (insertion direction) at the lower portion of the guide wall rib 51 formed in an upward opening shape at the upper portion. It is composed of a support wall rib 52 formed as described above. The left and right support wall ribs 52, 52 are set so that the distance w thereof substantially coincides with the shaft diameter d2 of the tip portion 12, so that the support space Y that supports the tip portion 12 (see FIG. 7). Consists of. The left and right support wall ribs 52, 52 are connected at the lower ends by cover ribs 53 erected so as to surround the circumference of the crown gear G.

Since the guide support portion 5 is configured in this way, first, the tip end portion 12 of the bit member 1 is easily guided in the support space Y by the upper guide wall ribs 51 and 51, so that the bit member 1 is inserted. The work can be done easily.

Further, since the tip portion 12 of the bit member 1 is lightly abutted and held by the left and right support wall ribs 52, 52, the tip portion 12 of the bit member 1 is stabilized and the bit member 1 is stably rotated. Can be operated.

In particular, since the shaft diameter d2 of the tip portion 12 and the dimension of the support space Y at the distance W between the left and right support walls 52 and 52 are set to be substantially the same, the tip portion 12 of the bit member 1 is set. It is securely held by the guide support portion Y, and the bit member 1 can be stably rotated without rattling.

In this way, the tip portion 12 of the bit member 1 is inserted into the guide support portion 5, and the crown gear G of the vertical adjustment aiming screw C3 is meshed with the cutting edge portion 31 of the tip portion 12. The optical axis adjusting tool T of the headlight R can be used to adjust the optical axis of the headlight R.

The structure of the optical axis adjustment of the vertical adjustment aiming screw C3 will be briefly described.

As shown in FIG. 7, the vertical adjustment aiming screw C3 is integrally provided with a substantially cup-shaped crown gear G as described above, and the outer surface of the crown gear G is hexagonal. The head G1 is provided.

A screw receiving portion 55 is fixedly attached to the light casing R1, and an optical axis adjusting structure is configured by screwing the vertical adjustment aiming screw C3 into the screw receiving portion 55.

Therefore, when the cutting edge portion 31 of the tip portion 12 of the bit member 1 is meshed with the crown gear G to rotate the bit member 1, the crown gear G also rotates and the vertical adjustment aiming screw C3 is moved. Can be haunted.

In this way, with the optical axis adjusting tool T of the present embodiment, the tip portion 12 of the bit member 1 is meshed with the aiming screw C3 for vertical adjustment, and then the bit member 1 is rotated to operate the headlight R. The optical axis adjustment work can be performed.

Since the left / right adjustment aiming screw C2 has the same structure, the description thereof will be omitted.

Next, the point that the length of the groove portion 41 ... Of the tip portion 12 of the bit member 1 of the present embodiment is shortened will be described. As described above, the groove portion 41 ... Of the bit member 1 of the present embodiment has a shorter length than the groove portion of the JIS standard cross driver.

By making the groove portion 41 ... shorter in this way, the groove portion 41 ... Is less likely to interfere with the support wall ribs 52, 52 of the guide support portion 5 (see FIG. 6). That is, since the groove portion 41 ... Is short, the length of the contact peripheral surface portion 33 that comes into contact with the guide support portion 5 on the entire circumference becomes long, so that the groove portion 41 ... alone does not come into contact with the guide support portion 5, and the guide support portion The groove 41 ... Is less likely to interfere with the support wall ribs 52 and 52 of 5.

Therefore, by shortening the groove portion 41 ... Of the tip portion 12, it is possible to reduce the possibility that the groove portion 41 ... will damage the guide support portion 5 when the bit member 1 is rotated, and the optical axis adjustment work can be performed quickly and with peace of mind. be able to.

Next, it will be described that the thickness of each cutting edge 42 ... Of the cutting edge portion 31 of the tip portion 12 of the bit member 1 of the present embodiment is formed to be thin. As described above, each cutting edge 42 of the bit member 1 of the present embodiment is thinner than the cutting edge of a JIS standard cross screwdriver.

By reducing the thickness of each cutting edge 42 ... In this way, the cutting edge portion 31 can be engaged deeper with the crown gear G of the aiming screws C2 and C3. This will be described with reference to FIGS. 7 and 8.

FIG. 8 shows a state in which the conventional cross screwdriver 101 is meshed with the crown gear G of the vertical adjustment aiming screw C3. The same components as those in FIG. 7 are given the same numbers as those in FIG. 7, and the description thereof will be omitted.

As shown in FIG. 8, in the conventional cross screwdriver 101, since the cutting edge 142 ... Is thick, the crown gear G rotates at a position slightly away from the crown gear G without reaching near the tooth bottom. The operating force will be transmitted.

On the other hand, as shown in FIG. 7, in the bit member 1 of the present embodiment, since the cutting edge 42 ... Is thin, the crown gear G can be meshed close to the tooth bottom and bite deeper. Can be matched.

As described above, in the present embodiment, since the crown gear G can be meshed more deeply, the rotational operation force of the bit member 1 can be more reliably transmitted to the aiming screw C3, and the optical axis can be transmitted. The adjustment work can be performed more efficiently.

As described above, in the optical axis adjusting tool T of the present embodiment, the shaft diameter d3 of the intermediate portion 13 of the bit member 1 is thin, and the shaft diameter d2 of the tip portion 12 is thick.

Therefore, in the intermediate portion d3 of the bit member 1, a large gap S2 can be secured between the bit member 1 and the through hole H or the like, and the operator can check the meshing state of the tip portion 12 or check the meshing state of the tip portion 12 through the gap S2. You can finely adjust the orientation of. Further, since the tip portion 12 of the bit member 1 of the optical axis adjusting tool T is less likely to rattle without a gap, stable rotation operation can be performed and stable optical axis adjustment work can be performed.

Therefore, in the optical axis adjusting tool T that adjusts the optical axis of the headlight R by operating the optical axis adjusting mechanism C of the headlight R, visibility and tool operability of the work place and tool operability even in a narrow work space or the like. It is possible to stably perform the optical axis adjustment work by preventing the shaft of the tool T from rattling even during the rotation operation while improving the above.

In this embodiment, the optical axis adjusting mechanism of a typical headlight shown in FIG. 4 and the like has been applied to the description, but the optical axis adjusting mechanism is, of course, not limited to this.

For example, instead of the crown gear G, the head of the screw is made concave, a cross slit is formed inside the concave shape, and the cross slit is operated to adjust the optical axis, or the crown gear G. It is applied to all optical axis adjustment mechanisms that can be operated with a cross driver, such as those that are provided with an idle gear that idles at the position facing the and make it easier to engage a tool with the idle gear. It is possible.

Further, the place where the intermediate portion is located is not limited to the case where it passes through the through hole of the vehicle body, and may be the case where the insertion place is narrowed due to the presence of in-vehicle parts or the like.

(Other embodiments)
Although the present invention has been described above in the first embodiment, the present invention is not limited to this embodiment.

For example, the shaft diameter of the intermediate portion of the bit member may be further reduced to, for example, a shaft diameter of about half the shaft diameter of the tip portion. Further, the cross-sectional shape of the intermediate portion is not limited to a circle, and may be a polygon such as a hexagon or an octagon.

Further, the shape and size of the operation base are not particularly limited as long as they have a function of transmitting the operation force.

As described above, the optical axis adjusting tool according to the present invention is useful in an optical axis adjusting tool that performs an optical axis adjusting work in a narrow work space.

T ... Optical axis adjustment tool 1 ... Bit member (shaft-shaped member)
2 ... Handle member 11 ... Operation base 12 ... Tip 13 ... Intermediate 31 ... Cutting edge 41 ... Groove 42 ... Cutting edge R ... Headlight C ... Optical axis adjustment mechanism C1 ... Pivot C2 ... Left and right adjustment aiming screw C3 ... Up and down Adjusting aiming screw

Claims (3)

It is an optical axis adjustment tool that adjusts the optical axis of the headlight by operating the optical axis adjustment mechanism of the headlight set inside the vehicle from the outside of the vehicle.
During the optical axis adjustment work, the optical axis adjusting tool has an operation base located outside the vehicle, a tip located inside the vehicle and meshing with the optical axis adjusting mechanism, and the operation base and the tip. It is provided with a long shaft-shaped member provided between them and having an intermediate portion that passes through a through hole of the vehicle body.
The tip portion has a cross-shaped cutting edge portion formed by denting four groove portions and a columnar contact peripheral surface portion.
The optical axis adjusting tool is characterized in that the shaft diameter of the intermediate portion is formed to be small and the shaft diameter of the contact peripheral surface portion of the tip portion is formed to be larger than that of the intermediate portion. .. A guide support portion is provided in the vicinity of the meshed portion of the optical axis adjusting mechanism.
The optical axis adjusting tool according to claim 1, wherein the shaft diameter of the contact peripheral surface portion of the tip portion is set so as to substantially match the dimension of the support space of the guide support portion. A cross-shaped cutting edge portion is formed at the tip portion of the shaft-shaped member.
The optical axis adjusting tool according to claim 1 or 2, wherein the thickness of the cutting edge of the cross-shaped cutting edge portion is formed to be thinner than the thickness of the cutting edge set by JIS standard B4633 (cross screwdriver) .

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