JP2600471Y2 - Bearing structure of automotive sun visor - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing structure of a sun visor for an automobile which is easy to manufacture.

[0002]

2. Description of the Related Art A sun visor is usually used to block incident light from a window into a vehicle cabin.
The sun visor is formed such that a light shielding plate made of a flat plate-like body is rotatably supported on a horizontal portion of a support shaft suspended from a ceiling. A bearing portion having a shaft hole formed therein is formed on an upper portion of the light-shielding plate, and the support shaft is fitted into a shaft hole provided in the bearing portion.

[0003] As described above, the sun visor is used by rotating the light shielding plate around the support shaft as appropriate and setting the angle at a predetermined position for use. In the stored state, the sun visor is set to a substantially horizontal posture. Therefore, the light-shielding plate must be stably maintained in a horizontal position against the vibration of the running automobile.
Further, when the light shielding plate is pulled out from the storage position to the light shielding position, it is preferable that the light shielding plate has a so-called moderation feeling that requires a slightly larger force than the subsequent rotation operation around the support shaft.

[0004] From such a fact, for example,
As shown in Japanese Patent No. 54812, a biasing means is generally formed in the shaft hole along the inner peripheral surface of the shaft hole having a flat portion in part, and the biasing means is formed in the support shaft. The support shaft flat portion corresponding to the shaft hole flat portion of the means is formed, and the storage position of the light shielding plate is set in a state where the flat portions are in contact with each other.

[0005] In recent years, for effective use of resources and environmental preservation, for example, as shown in Japanese Patent Application Laid-Open No. 5-65021, all parts constituting a sun visor are formed from a synthetic resin material. It has become. With such a configuration, when disposing of the sun visor whose life has passed, it is possible to directly supply the sun visor as a raw material for resource recycling without performing a pre-treatment such as removing metal parts from the sun visor. Reduce.

FIG. 5 is a partially cutaway side view illustrating a sun visor in which all of the above components are made of synthetic resin, and FIG. 6 is a partially enlarged perspective view taken along line D in FIG. is there. First, as shown in FIG.
Is composed of an L-shaped support member 2 hanging down from the ceiling of the vehicle interior (not shown) and a light shielding plate 3 coupled to the support member 2.

A support shaft 21 for supporting the light shielding plate 3 is formed in a horizontal portion of the support member 2. On the other hand, the light shielding plate 3
A bearing 31 is provided at the upper left of the bearing 3.
A shaft hole 32 having an opening on the left side surface of the bearing 1 is formed in the bearing 31 in the longitudinal direction. Such a bearing part 3
By fitting the support shaft 21 into one shaft hole 32,
The light-shielding plate 3 is in a state of being rotatably supported around the support shaft 21.

The light-shielding plate 3 is composed of the bearing 31, a frame 35 integrally fixed to the bearing 31 via a beam 34, and a skin 33 covering the surface of the frame 35. It is configured. A wiring lead-in hole 31a is formed in a side surface of the bearing portion 31.

In the conventional sun visor 10 as described above, a notch extending to the center of the girder portion 34 in the longitudinal direction of the bearing portion 31 is formed in a portion of the inner wall surface of the shaft hole 32 facing the frame portion 35. A groove 4 is formed. In addition, an axial hole flat surface 5 extending in the longitudinal direction of the bearing portion 31 is provided in parallel with the cut groove 4.

On the other hand, the support shaft 21 has a support shaft flat surface 6 corresponding to the bearing flat surface 5. Therefore, when the bearing portion 31 is rotated around the support shaft 21 in a state where the bearing portion 31 is fitted to the support shaft 21, the state in which the shaft hole flat surface 5 and the support shaft flat surface 6 contact each other is the light shielding plate 3. It is in a stable position.

[0011]

The conventional sun visor 10 made of a synthetic resin as described above usually has a mold having an upper mold and a lower mold in which a concave portion is formed such that the inner wall surface becomes the outer shape of the sun visor 10. It is manufactured by a so-called injection molding method in which a synthetic resin material in a heated and molten state is injected and supplied.
Then, after the synthetic resin raw material is injected, the upper die and the lower die that have been united are separated from each other, and a molded product is removed to take out a molded product. Thus, the light shielding plate 3 of the sun visor 10 is completed.

Since the light-shielding plate 3 must have the bearing portion 31 having the shaft hole 32, a core M having a shaft hole shape is employed. Attached to. After the mold is separated after the injection operation, the core M is pulled out of the bearing 31 as shown by a two-dot chain line in FIG.

However, the operation of mounting the core M before injection and the operation of extracting the core M after molding as described above are considerably troublesome. Particularly, in the mounting operation, the core M is placed at a predetermined position. If it is not arranged correctly, the finished shaft hole 32
May become oblique or the posture of the connection of the light shielding plate 3 to the support shaft 21 becomes abnormal, so that the mounting operation of the core M into the mold is a work that takes considerable nerves.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a shaft hole can be easily provided in a bearing portion without using a core. It is an object of the present invention to provide a bearing structure of a sun visor for an automobile, which can reduce costs.

[0015]

According to a first aspect of the present invention, there is provided a bearing structure for a sun visor for an automobile, wherein a light-shielding plate is rotatably supported around a support shaft provided in a vehicle interior, and the light-shielding plate is provided. A bearing portion having an opening at a side portion thereof and having a shaft hole extending in a longitudinal direction is provided, a shaft hole flat surface extending in a longitudinal direction is provided in the shaft hole, and the bearing flat surface is provided on the support shaft. The bearing part is integrated so that the orientation of the open parts is alternated in a state in which a plurality of semicircular bearings having open parts on one side are shifted by the thickness in the axial direction. Characterized in that it is connected to

[0016]

According to the bearing structure of the sun visor for an automobile according to the first aspect of the present invention, the bearing portion has a plurality of semicircular bearings each having an opening portion on one side thereof, the orientation of the opening portion being shifted by an axial thickness. Are joined together so that they alternate
When a sun visor having such a bearing portion is manufactured by a molding method using a mold, a molding operation is performed by alternately forming an inner surface shape and an outer surface shape of a semicircular bearing in each of an upper mold and a lower mold. It is possible to easily remove the mold by simply separating the upper mold and the lower mold after completion, and a core for forming a shaft hole is arranged in the mold in advance, as in the related art, and In addition, it is not necessary to perform the operation of pulling out the core after the completion of the molding process, so that the man-hour during manufacturing can be reduced.

In the bearing portion of the sun visor manufactured as described above, a flat shaft hole is formed on the inner wall surface of the shaft hole, and the flat shaft hole is formed on the outer peripheral surface of the support shaft. Since the support shaft flat surface is formed so as to correspond to the above, the bearing portion is fitted to the support shaft in a state where the shaft hole flat surface and the support shaft flat surface are in contact with each other, and the light shielding plate is turned around the support shaft. If it is moved, the edge of the support shaft flat surface presses the shaft hole flat surface, the cut groove is pushed open by this pressure, and the bearing portion at that portion is elastically deformed, and the restoring force against this deformation applies to the bearing portion. An urging force is generated. By generating the urging force, a sense of moderation can be obtained when the light shielding plate is rotated around the support shaft.

Further, if all parts of the sun visor, including the support shaft, are made of synthetic resin, when the sun visor is regenerated or incinerated after the service life has elapsed, it can be supplied to the processing equipment without any decomposition. As a result, the reduction of waste disposal costs can be realized, the reduction of waste disposal is promoted, and it is possible to greatly contribute to effective use of resources and environmental conservation. In addition, when the support shaft is made of metal, waste treatment can be performed without particular disassembly by performing only the process of pulling out the support member from the sun visor.

[0019]

1 is a partially cutaway side view showing an example of a sun visor to which a bearing structure according to the present invention is applied.
FIG. 2 is a partially enlarged exploded perspective view showing an example of the bearing structure of FIG. 1. First, as shown in FIG. 1, a sun visor 1 for an automobile basically includes an L-shaped support member 2 which is suspended from a ceiling of a vehicle interior (not shown) and a light-shielding plate 3 which is connected to the support member 2. ing. A support shaft 21 that supports the light shielding plate 3 is formed in a horizontal portion of the support member 2,
A bearing portion 31 is provided at the upper left of the light shielding plate 3. A shaft hole 32 having an opening on the left side surface of the bearing portion 31 is formed in the longitudinal direction of the bearing portion 31. By fitting the support shaft 21 into the shaft hole 32 of the bearing 31, the light-shielding plate 3 is rotatably supported around the support shaft 21.

Then, the light-shielding plate 3 is turned around the support shaft 21 and flipped upward, and the position where the light-shielding plate 3 is brought into contact with the ceiling is set as a storage position, and is pulled out from this storage position so as to hang downward. Is set as the light blocking position. FIG. 1 shows a state in which the light shielding plate 3 is at the light shielding position.

The light shielding plate 3 is composed of the bearing portion 31, a frame portion 35 integrally fixed to the bearing portion 31 via a spar portion 34, and a skin 33 covering the surface of the frame portion 35. It is configured. The surface of the light-shielding plate 3 is made beautiful by the skin 33. The bearing part 31
A wiring lead-in portion 36 extends from the right end of the wiring lead portion, and a wiring lead-in hole 31a is formed in a side surface of the wiring lead-in portion 36.

Such a bearing portion 31 is shown in FIGS.
As shown in FIG. 7, a plurality of semicircular bearings 30 each having an open portion 30a are set so that the directions in which the open portions 30a face are alternated, and they are integrally connected. Therefore, although each semicircular bearing 30 does not form a circular shaft hole, when they are superimposed, they are arranged so that the open portions 30a are alternated as shown in FIG. The shaft hole 32 is formed by the plurality of semicircular bearings 30.

In the case of the present embodiment, the opening 30
a is set substantially parallel to the light shielding plate 3, and the tops of the semicircular bearings 30 adjacent to each other are integrally connected to each other.
Are formed. Therefore, the tops of all the semicircular bearings 30 are connected by the respective bridge portions 30b.

Each of the beam portions 34 extending from the lower portion of each bearing portion 31 has a base end portion 34a having a thickness set at a root portion thereof, and the base end portion 34a is provided with a light shielding plate. 3 is integrally connected to the frame portion 35. The girder portion 34 formed between the base end portion 34a and the bearing portion 31 is set to be thinner than the base end portion 34a. When the bearing portion 31 is viewed from the front side, as shown in FIG. The groove portions 4a similar to the groove portions 4a shown in FIG. 6 are formed by the beam portions 34 adjacent to each other.

The one semicircular bearing 30 is provided with a shaft hole flat surface 5 extending in the longitudinal direction of the bearing portion 31 in parallel with the groove portion 4a. In the case of this embodiment, the shaft hole flat surface 5 is provided on the right semicircular bearing 30 shown in FIG. Further, in FIG. 3, the shaft hole flat surface 5 is formed parallel to the groove portion 4 a as described above, but may be oblique.

On the other hand, the support shaft 21 is divided into a plurality of parts according to the span dimension of the bearing part 31, that is, the horizontal width dimension of the unit semicircular bearing 30, and the support shaft 2 is provided at each boundary between these divisions.
A locking ring 22 protruding from the surface of the first member 1 is formed. Further, in a state where the support shaft 21 is fitted into the shaft hole 32 of the bearing portion 31, a support shaft flat surface 6 is formed at a portion where the surface thereof comes into contact with the bearing flat surface 5. Therefore, in a state where the bearing portion 31 is fitted to the support shaft 21, the inner peripheral edge portion of the other semicircular bearing 30 in which the locking ring 22 protrudes toward the open portion 30 a side of the one semicircular bearing 30. It is prevented from getting locked out. The stable position of the light shielding plate 3 is a state in which the shaft hole flat surface 5 and the support shaft flat surface 6 are in contact with each other by rotating the bearing portion 31 around the support shaft 21.

In the case of this embodiment, as shown in FIGS. 2 and 3, the stable position of the light shielding plate 3 is a so-called light shielding position where the light shielding plate 3 hangs down from the support shaft 21. By forming the support shaft flat surface 6 horizontally, it is also possible to set the stable position to the storage position of the light shielding plate 3.

In the present embodiment, the beam 3
Four ribs 7 integral with the spar portion 34 bulging outward in the width direction of the spar portion 34 are formed on side surfaces of the spar 4. This rib 7
In the figure, the upper end in the figure extends over the lower circular arc portion of the bearing portion 31, bulges outward to form a curved surface, and is tapered downward.

In the sun visor 1 of the present invention configured as described above, in the present embodiment, all the components such as the light shielding plate 3 including the frame portion 35 and the skin 33 and the bearing portion 31 are formed of synthetic resin. ing. Specifically, polypropylene is applied, but is not limited to polypropylene, for example, polyethylene, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene, polymethyl methacrylate, polyethylene terephthalate, polyamide, polyacetal, polycarbonate, polyimide, Polytetrafluoroethylene or the like is applicable. Also, instead of applying the same synthetic resin material to all parts, an optimal synthetic resin material may be appropriately selected according to the characteristics of the parts.

The support member 2 is often made of a synthetic resin, but may be made of a metal. The reason is that the support member 2 is preferably as rigid as possible as a support member, and even if the support member 2 is made of metal, the bearing portion is not disassembled without disassembling the sun visor 1 during waste treatment. This is because the support member 2 can be easily pulled out from the base member 31 and the operation of separating metal and synthetic resin during processing does not involve much difficulty.

As described in detail above, the bearing structure of the present invention is such that a plurality of semicircular bearings 30 each having an opening 30a on one side are arranged so that the direction in which the opening 30a faces is alternated. Since they are formed by being overlapped, they can be easily manufactured by an injection molding method using a mold.

The ease of manufacture will be described below with reference to FIG. FIG. 4 is an explanatory view in cross section showing an example of a mold for manufacturing the bearing unit. In particular, FIG.
The plane cut by the line is shown. As shown in this figure, the mold K is composed of an upper mold K1 and a lower mold K2,
A cavity K3 indicated by stippling corresponding to the three-dimensional shape of the bearing portion 31 is formed on the surfaces of the two dies K1 and K2 facing each other.

Then, by injecting the synthetic resin material heated and melted into the cavity K3 in a state where the cavity K3 is formed by the mold K, one semicircular bearing 30 is placed in the cavity K3 of the upper mold K1. Formed, lower mold K
The other semicircular bearing 30 is formed in the second cavity K3. In this case, the shaft hole 32 of the bearing portion 31 is formed between the two dashed lines. Thereafter, by separating the upper die K1 and the lower die K2, a bearing portion 31 as shown in FIGS. 1 to 3 is obtained.

As described above, in the present invention, the bearing 3
Reference numeral 1 denotes a plurality of semicircular bearings 30 each having an open portion 30a.
Are arranged in a staggered manner, so that there is no need to mount a core for forming the shaft hole 32 in the mold K as in the conventional case. It is possible to form the hole 32, and it is possible to omit a troublesome mounting operation of the core and an operation of pulling out the core after molding. As a result, the number of manufacturing steps of the sun visor 1 can be reduced, and the manufacturing cost can be reduced. It can greatly contribute to reduction.

The operation of the sun visor 1 to which the bearing structure of the present invention thus obtained is applied will be described below. As described in detail above, the bearing structure of the sun visor for an automobile of the present invention is provided with the bearing portion 31 having the opening at the side portion of the light shielding plate 3 and the shaft hole 32 extending in the longitudinal direction. The bearing portion 31 is formed by stacking a plurality of semicircular bearings 30 each having an open portion 30a so that the direction in which the open portions 30a face is alternated.
The beam portion 34 of one semi-circular bearing 30 and the other semi-circular bearing 3
A groove-shaped portion 4a is formed between the semi-circular bearing 30 and the shaft hole flat surface 5 extending in the longitudinal direction is provided on the inner wall surface of the semi-circular bearing 30, and the bearing flat surface 5 is formed on the support shaft 21. The support shaft flat surface 6 corresponding to the above is formed, and an outwardly bulging rib 7 extending in the depth direction of the groove is formed on a side surface portion of the girder portion 34 extending in the longitudinal direction.

Accordingly, by fitting the support shaft 21 to the bearing portion 31, the light shielding plate 3 is connected to the support member 2 so as to be rotatable around the support shaft 21. And bearing part 3
1 and the support shaft 21 is fitted to the shaft hole flat surface 5.
If the flat shaft 6 and the support shaft flat surface 6 contact each other, the rotation of the light shielding plate 3 around the support shaft 21 is regulated, and the combined state of the two is stabilized, so that the position of the light shielding plate 3 is stored in the contact state. The position may be set so as to be the position or the light shielding position.

When the shaft hole flat surface 5 and the support shaft flat surface 6 are in contact with each other, the light shielding plate 3 is manually operated to rotate the bearing 31 around the support shaft 21. 2 and 3 of the support shaft flat surface 6 formed on the support shaft 21 presses the shaft hole flat surface 5 of the bearing portion 31. Are elastically deformed to function as urging means,
Is pushed open.

Therefore, if the light-shielding plate 3 is rotated around the support shaft 21 from the state where the shaft hole flat surface 5 and the support shaft flat surface 6 are in contact with each other, a so-called moderation feeling that is slightly responsive can be obtained. Can be.

Since most of the parts are made of synthetic resin, when the sun visor 1 is regenerated or incinerated, if the support member 2 is made of metal, an operation of simply pulling out the support member 2 from the light shielding plate 3 is performed. Alternatively, when the supporting member 2 is also made of a synthetic resin, the sun visor 1 can be supplied to the processing equipment without any disassembly at all, and the waste processing cost can be greatly reduced.

[0040]

As described above, according to the bearing structure of the automotive sun visor according to the present invention, the bearing portion is formed by displacing a plurality of semicircular bearings each having an open portion on one side by an axial thickness. When the sun visor having such a bearing portion is manufactured by a molding method using a mold because the opening portions are integrally joined so that the directions of the opening portions are alternately formed, a semicircle is formed on each of the upper mold and the lower mold. By alternately forming the inner surface shape and the outer surface shape of the ring-shaped bearing, it is possible to easily remove the die by simply separating the upper die and the lower die after the completion of the molding operation. It is not necessary to dispose the core for forming the core in the mold in advance and to perform the operation of pulling out the core after the completion of the molding process, which is advantageous in that the number of man-hours during manufacturing can be reduced.

The bearing portion of the sun visor manufactured as described above has a shaft hole flat surface formed on the inner wall surface of the shaft hole, and the shaft hole flat surface is formed on the outer peripheral surface of the support shaft. The support shaft flat surface is formed so as to correspond to. Therefore, if the bearing portion is fitted in a state where the flat surface of the shaft hole and the flat surface of the support shaft are in contact with each other on the support shaft and the light-shielding plate is rotated around the support shaft, the edge of the flat surface of the support shaft becomes the shaft. The flat surface of the hole is pressed, and the cut groove is pushed and widened by this pressing, and the bearing portion at that portion is elastically deformed, and a biasing force is generated in the bearing portion with a restoring force against this deformation, so that the generation of the biasing force blocks light. When the plate is rotated around the support shaft, a sense of moderation can be obtained.

If all parts of the sun visor, including the support shaft, are made of synthetic resin, when the sun visor is regenerated or incinerated after the end of its useful life, it can be supplied directly to the processing equipment without any decomposition. As a result, the reduction of waste disposal costs can be realized, the reduction of waste disposal is promoted, and it is possible to greatly contribute to effective use of resources and environmental conservation. In addition, when the support shaft is made of metal, waste treatment can be performed without particular disassembly by performing only the process of pulling out the support member from the sun visor.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing an example of a sun visor to which a bearing structure according to the present invention is applied.

FIG. 2 is a partially enlarged perspective view taken along line A of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is an explanatory view in cross section showing an example of a mold for manufacturing a bearing unit, and shows a cross section cut along line CC in FIG. 2;

FIG. 5 is a partially cutaway side view showing an example of a conventional sun visor.

FIG. 6 is a partially enlarged perspective view taken along the line D in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sun visor 2 Support member 21 Support shaft 22 Locking ring 3 Light shielding plate 30 Semicircular bearing 30a Open part 30b Bridge part 31 Bearing part 31a Retraction hole 32 Shaft hole 33 Skin 34 Girder part 34a Base end part 35 Frame part 4 Cut groove 4a Groove portion 5 Flat shaft hole 6 Flat support shaft 7 Rib K Mold K1 Upper die K2 Lower die

Claims (1)

(57) [Scope of request for utility model registration] 1. A light-shielding plate is rotatably supported around a support shaft provided in a vehicle interior, and has an opening at a side portion of the light-shielding plate and a shaft hole extending in a longitudinal direction. A bearing portion is provided, a shaft hole flat surface extending in the longitudinal direction is provided in the shaft hole, a support shaft flat surface corresponding to the bearing flat surface is formed on the support shaft, and the bearing portion has an open portion on one side. A bearing structure for a sun visor for an automobile, wherein a plurality of semi-circular bearings are integrally connected so that the directions of the open portions are alternately shifted in a state of being shifted by an axial thickness.