JPH10278580A - Sun visor knob structure - Google Patents

Abstract

(57) [Summary] [Problem] To smooth the rotation of a knob, to prevent the knob from falling off from a holder when the sun visor is shifted, to prevent the sound of the knob hitting a wire frame, and to perform a welding process. Sometimes it is necessary to prevent the knob from deforming and to keep the knob in a shape close to a perfect circle. SOLUTION: In a knob structure of a sun visor comprising a knob 8 rotatably enclosing a wire frame 2 by welding two half-split knob members 9 at joining surfaces 14A and 14B which are joined together. The split knob member 9 is provided with wire frame receiving portions 10L and 10R on an inner surface 9a of a member main body 9A having a shape obtained by half-splitting a cylinder. The outer receiving surface portion 11 and the inner receiving surface portion 12 of these wire frame receiving portions 10L and 10R are provided. When the wire frame 2 is wrapped, the projection 13 is provided so as to slide on the wire frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knob structure of a sun visor for an automobile.

[0002]

2. Description of the Related Art As shown in FIG. 1, a sun visor 1 has pad materials 3 on upper and lower surfaces of a wire frame 2 bent in a loop shape.
A sun visor body 4 is formed by laminating A and enclosing the outer periphery thereof with a skin material 3B, and a knob accommodating section 5 formed of a notch is provided on the left side of the upper edge of the sun visor body 4. The wire frame 2 is exposed in the knob housing portion 5, and the exposed portion is a knob mounting portion 2A. A knob 8 made of resin such as ABS is attached to the knob attachment portion 2A. A shaft 6 and a bracket 7 for fixing the sun visor 1 to the vehicle body are attached to the right end of the upper edge of the sun visor body 4.

[0003] The sun visor 1 is mounted in the vehicle cabin by fixing its bracket 7 to the vehicle body side and by detachably fitting the knob 8 to a holder 20 fixed to the vehicle body side.

[0004] The knob 8 is composed of two half-knob members 9, and the half-knob member 9 has a member main body 9 A in which a cylinder is half-split as shown in FIG.
On the inner surface 9a of the member main body 9A, wire frame receiving portions 10L and 10R are formed integrally with the member main body 9A on the left and right. These wire frame receiving portions 10L, 10R
Are provided on the inner surface 9a of the member body 9A on the receiving surfaces 11, 11 having a predetermined width.
2 are formed at intervals.

[0005] The two half-split knob members 9 are placed on the side of the wire frame receiving portions 10L and 10R with the knob mounting portion 2A of the wire frame 2 therebetween. The knobs 8 are rotatably attached to the knob attachment portion 2A of the wire frame 2 by welding the joint surfaces 14 together by ultrasonic welding.

In this case, as shown in FIG. 6, the knob mounting portion 2A of the wire frame 2 and the wire frame receiving portion 10
Clearance C between receiving surfaces 11 and 12 of L and 10R
There is. If the knob 8 does not rotate with respect to the knob mounting portion 2A of the wire frame 2,
When the sun visor 1 is shifted from the storage position to the use position and from the use position to the storage position, the knob 8 falls off the holder 20 so that the rotation is smooth.

[0007]

However, as described above, the clearance C is set so that the knob 8 rotates smoothly.
In this case, rattling occurs, and there is a problem that a knocking sound (low-grade sound) occurs when the knob 8 hits the knob mounting portion 2A of the wire frame 2, and too much pressure is applied during ultrasonic welding. As shown in FIG. 7, the cross section of the knob 8 does not become a perfect circle but becomes distorted, so that the knob mounting portion 2A of the wire frame 2 is firmly sandwiched between the knob 8 and the knob 8 cannot be smoothly rotated. However, there is a problem that the knob 8 falls off the holder 20 and the sun visor 1 comes off the holder 20.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to make the rotation of the knob smooth and to remove the knob from the holder when the sun visor is displaced. And a knob structure of a sun visor that prevents the knob from hitting the wire frame and also prevents the knob from deforming during welding and keeps the knob in a shape close to a perfect circle. Is to do.

[0009]

In order to achieve the above object, a knob structure of a sun visor according to the first aspect of the present invention is obtained by welding two half-split knob members at a joint surface where they are joined together. In a knob structure of a sun visor having a knob rotatably enclosing a wire frame, the half-split knob member is provided with a wire frame receiving portion on an inner surface of a member main body having a shape obtained by half-splitting a cylinder. When enclosing the wire frame on the surface of the frame receiving portion,
It is characterized in that the wire frame is provided with a convex body that is in sliding contact with the wire frame.

With this configuration, the convex body comes into contact with the wire frame, and the contact area of the knob with the wire frame can be reduced. For this reason, the frictional force is reduced, and the knob rotates smoothly.When the sun visor is shifted from the storage position to the use position and from the use position to the storage position, the knob falls off the holder and the sun visor is removed. The problem of detachment from the holder can be eliminated.

Further, the center of the knob and the center of the wire frame can coincide with each other due to the contact of the convex body with the wire frame, and the center of the knob is prevented from shifting. For this reason, it is possible to prevent the sound of the knob hitting the wire frame. Further, at the time of welding, the convex body prevents the knob from melting beyond a certain dimension while maintaining the wire frame at the center, thereby preventing deformation and maintaining the knob in a shape close to a perfect circle.

[0012] To achieve the above object, a knob structure of a sun visor according to the invention of claim 2 is provided.
In the knob structure of the sun visor according to the above, the height of the convex body is set to a height that is slightly crushed by the wire frame when the two half-split knob members are welded to each other at the joined surfaces that are joined together. Set.

With this configuration, not only can the same operation as that of the first aspect of the invention be achieved, but also rattling between the knob and the wire frame can be prevented. Adjustment of the height of the convex body is expensive because it requires repair of the mold, but by setting the height of the convex body to a height that is slightly crushed by the wire frame during the welding process, The height of the convex body can be adjusted without modifying the mold.

In order to achieve the above object, a knob structure of a sun visor according to the invention of claim 3 is provided.
Alternatively, in the knob structure of the sun visor according to claim 2, the convex body is constituted by a plurality of protrusions provided on the surface at predetermined intervals in a circumferential direction.

With such a configuration, the same effect as that of the first or second aspect of the present invention can be achieved by replacing the convex body with the projection.

In order to achieve the above object, a knob structure of a sun visor according to a fourth aspect of the present invention provides the knob structure of a sun visor according to the first or second aspect, wherein It consisted of ribs provided on the surface in the circumferential direction.

With this configuration, by replacing the convex body with the rib, an operation similar to the operation of the first or second aspect of the invention can be achieved.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the sun visor in a partially broken-down disassembled state, FIG. 2 is a cross-sectional view of a knob structure of the sun visor according to the present invention, and FIG. 3 is a perspective view of a half knob member of the knob structure.

The knob 8 according to the present invention is composed of two half-knob members 9. The half-knob member 9 has a member body 9A having a shape obtained by half-splitting a cylinder. A wire frame receiving portion 1 is provided on the inner surface 9a of the 9A.
0L and 10R are formed integrally with the member main body 9A.

These wire frame receiving portions 10L, 1L
0R forms an outer receiving surface portion 11 and an inner receiving surface portion 12 of a predetermined width at an interval on the inner surface 9a of the member main body 9A, and is located on the end side of the half-split knob member 9 among the receiving surface portions 11 and 12. On the surface of the outer receiving surface 11, there are provided two substantially conical protrusions 13, which are convex bodies A, at predetermined intervals in the circumferential direction. The number of the protrusions 13 may be two or more.

A bonding surface 14A, which is one half surface of the member body 9A, has a left wire frame receiving portion 10A.
L, an engaging groove 15 is formed on the end side of the right wire frame receiving portion 10R, and an engaging protrusion 16 is formed on the end side of the right wire frame receiving portion 10R. On the joining surface 14B, which is a surface, an engagement protrusion 17 is located on the end side of the left wire frame receiving portion 10L.
Engagement grooves 18 are formed at the ends of the right wire frame receiver 10R.

Then, the two half-split knob members 9 are positioned with the knob mounting portion 2A of the wire frame 2 on the wire frame receiving portions 10L and 10R inside thereof, and the joining surfaces 14A and 14B of the wire frame 2 face each other. Then, the engaging protrusion 16 is engaged with the engaging groove 18 and the engaging protrusion 17 is engaged with the engaging groove 15, respectively, and the joining surfaces 14A and 14B are joined together, and joined to each other by ultrasonic welding. By welding the surfaces 14A and 14B, the knob 8 is rotatably mounted on the knob mounting portion 2A of the wire frame 2 of the knob housing 5.

In this case, a clearance C1 between the knob mounting portion 2A of the wire frame 2 and the outer receiving surface portion 11 and the inner receiving surface portion 12 of the wire frame receiving portions 10L and 10R.
Is about 0.05 mm, and is about 0.1 mm as a whole.

The size of the projection 13 is set to a height at which the projection 13 is slightly crushed when welding is performed.
It is preferable to prevent backlash with the knob mounting portion 2A. Therefore, the height of the projection 13 is set to be equal to or slightly higher (about 0.75 mm) than the clearance C1.

The projection 13 makes point contact with the knob mounting portion 2A of the wire frame 2 to reduce the contact area of the outer receiving surface portion 11 and the inner receiving surface portion 12 with the knob mounting portion 2A. For this reason, since smooth friction can be obtained with a small frictional force, when the sun visor 1 is shifted from the storage position to the use position and from the use position to the storage position, the knob 8 falls off the holder 20, Sun visor 1 is holder 20
Can be eliminated.

Since the projections 13 are arranged at four equally spaced positions in the circumferential direction, the center of the knob 8 and the knob mounting portion 2A are brought into contact by the contact of the projections 13 with the knob mounting portion 2A. Center and match. For this reason, the occurrence of a tapping sound of the knob 8 hitting the wire frame 2 is prevented, and the center shift of the knob 8 is prevented.

Further, the projection 13 is maintained at the center of the knob mounting portion 2A of the wire frame 2 while the ultrasonic welding is performed.
Knob 8 is not melted beyond a certain size to prevent deformation,
There is a mechanism for maintaining the knob 8 in a shape close to a perfect circle.

In the above-described embodiment,
Wire frame receiving portions 10L, 10 of the half knob member 9
The convex body A formed on the surface portion of the receiving surface portion 11 of R is constituted by a plurality of substantially conical projections 13, but as shown in FIG. 4, it is continuous with the surface portion of the receiving surface portion 11 of the wire frame receiving portions 10L and 10R. In some cases, the ribs 20 may be formed to have a point contact or a line contact by forming a rib 20 formed in a hemispherical shape. The ribs 20 may be formed intermittently in the circumferential direction of the receiving surface 11. Further, the projection 13 is provided on the outer receiving surface portion 11 side, but may be provided on the inner receiving surface portion 12 side.

In the case of the rib 20, the protrusion 13
As in the case of the above, the size is preferably set to a height that is slightly crushed when welding is performed so as to prevent rattling with the knob mounting portion 2A of the wire frame 2. The length is set equal to or slightly higher than the clearance c (about 0.75 mm).

Then, the rib 20 is brought into line contact or point contact with the knob mounting portion 2A of the wire frame 2 so that the outer receiving surface 1
The contact area of the knob 1 (or the inner receiving surface portion 12) with the knob mounting portion 2A is reduced. For this reason, since smooth friction can be obtained with a small frictional force, when the sun visor 1 is shifted from the storage position to the use position and from the use position to the storage position, the knob 8 falls off the holder 20, The disadvantage that the sun visor 1 comes off the holder 20 can be eliminated.

The center of the knob 8 and the center of the knob mounting portion 2A coincide with each other due to the contact of the rib 20 with the knob mounting portion 2A. For this reason, the occurrence of a tapping sound between the knob 8 and the wire frame 2 is prevented, and the center of the knob 8 is prevented from shifting.

Further, the rib 20 is maintained at the center of the knob mounting portion 2A of the wire frame 2 while the ultrasonic welding is performed.
Knob 8 is not melted beyond a certain size to prevent deformation,
There is a mechanism for maintaining the knob 8 in a shape close to a perfect circle.

[0033]

As described above, according to the knob structure of the sun visor according to the first aspect of the invention, the wire frame is rotated by welding the two half-split knob members at the mating joint surfaces. In a knob structure of a sun visor having a knob to be encapsulated as possible, the half-split knob member is provided with a wire frame receiving portion on an inner surface of a member body having a shape obtained by half-splitting a cylinder. Further, when the wire frame is wrapped, a convex body that slides on the wire frame is provided, so that the convex body comes into contact with the wire frame and the contact area of the knob with the wire frame can be reduced. . For this reason, the friction force is reduced, the knob rotates smoothly, and the sun visor is moved from the storage position to the use position,
In the case where the knob is shifted from the use position to the storage position, it is possible to solve the problem that the knob comes off the holder and the sun visor comes off the holder.

Further, the center of the knob and the center of the wire frame can coincide with each other due to the contact of the convex body with the wire frame, and the center of the knob is prevented from being shifted from the center. The occurrence of hitting sounds can be prevented. Further, at the time of welding, the convex body prevents the knob from melting beyond a certain dimension while maintaining the wire frame at the center, thereby preventing the knob from deforming and keeping the knob in a shape close to a perfect circle.

According to the knob structure of the sun visor according to the second aspect of the present invention, in the knob structure of the sun visor according to the first aspect, the height of the convex body is reduced by two of the half-split knobs. When the members are welded at the joint surfaces joined to each other, by setting the height to be slightly crushed by the wire frame, not only the same effect as the effect of the invention of claim 1 can be obtained, but also the knob and the wire frame Rattling can be prevented. Adjustment of the height of the convex body is expensive because it requires repair of the mold, but by setting the height of the convex body to a height that is slightly crushed by the wire frame during the welding process, The height of the convex body can be adjusted without modifying the mold.

According to the knob structure of the sun visor according to the third aspect of the present invention, in the knob structure of the sun visor according to the first or second aspect, the convex body is circumferentially attached to the surface portion. With the configuration including the plurality of protrusions provided at predetermined intervals, the same effect as the effect of the first or second aspect of the invention can be obtained by replacing the convex body with the protrusion.

According to the knob structure of the sun visor according to the fourth aspect of the present invention, in the knob structure of the sun visor according to the first or second aspect, the convex body is circumferentially attached to the surface portion. With the ribs provided, the same effects as the effects of the first or second aspect of the present invention can be obtained by replacing the convex bodies with the ribs.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a sun visor in a partially broken state.

FIG. 2 is a sectional view of a knob structure of the sun visor according to the present invention.

FIG. 3 is a perspective view of a half-split knob member having the same knob structure.

FIG. 4 is a cross-sectional view of another embodiment of the knob structure of the sun visor according to the present invention.

FIG. 5 is a perspective view of a half knob member having a conventional sun visor knob structure.

FIG. 6 is a sectional view of the knob structure.

FIG. 7 is a cross-sectional view of the knob structure in a distorted state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sun visor 2 Wire frame 2A attachment part 8 Knob 9 Half-split knob member 10L Wire frame receiving part 10R Wire frame receiving part 11 Outer receiving surface part (surface part) 12 Inner receiving surface part (surface part) 13 Projection (convex body A)

Claims (4)

[Claims] 1. A knob structure for a sun visor, comprising a knob for rotatably enclosing a wire frame by welding two half-split knob members at a joining surface where they are joined to each other. A wire frame receiving portion is provided on the inner surface of a member body having a shape obtained by dividing a cylinder in half, and a convex body that slides on the wire frame is provided on a surface portion of the wire frame receiving portion when the wire frame is covered. Knob structure of sun visor characterized by comprising. 2. The height of the convex body is set to a height that is slightly crushed by the wire frame when the two half-split knob members are welded to each other at joint surfaces joined together. The knob structure of the sun visor according to 1. 3. The knob structure of a sun visor according to claim 1, wherein the convex body is constituted by a plurality of protrusions provided on the surface at predetermined intervals in a circumferential direction. 4. The knob structure of a sun visor according to claim 1, wherein the convex body is constituted by a rib provided on the surface in a circumferential direction.