JPH0715414U - Bearing structure of automobile sun visor - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it possible to easily manufacture a sun visor by an injection molding method. [Structure] The light-shielding plate 3 has a support shaft 21 attached to a vehicle interior.
A bearing portion 31 is provided that is rotatably pivoted around, has an opening at a side portion of the light shielding plate 3, and has a shaft hole 32 extending in the longitudinal direction. A groove portion 4a is formed in the longitudinal direction, a shaft hole flat surface 5 extending in the longitudinal direction is provided in the shaft hole 32, and a support shaft flat surface 6 corresponding to the bearing flat surface 5 is provided on the support shaft 21. A plurality of semi-circular bearings 30 each having an opening portion formed on one side of the bearing portion 21 are integrally coupled so that the directions of the opening portions 30a are alternated.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bearing structure for an automobile sun visor that is easy to manufacture.

[0002]

[Prior art]

 A sun visor is usually used to block the incident light that enters from the window into the passenger compartment of an automobile. The sun visor is formed by rotatably supporting a light shielding plate made of a flat plate-like member on a horizontal portion of a support shaft hanging from a ceiling portion. A bearing portion having a shaft hole is formed in the upper portion of the light shielding plate, and the support shaft is fitted in the shaft hole provided in the bearing portion.

As described above, the sun visor is used by appropriately rotating the light shielding plate about the support shaft and setting the angle in a predetermined position for use. However, in the stored state, the sun visor is set in a substantially horizontal posture. Therefore, the shading plate must maintain a stable horizontal posture against the vibration of the moving vehicle. Further, when pulling out the light shielding plate from the storage position to the light shielding position, it is preferable to have a so-called moderation feeling that requires a slightly larger force than the subsequent rotation operation around the support shaft.

Therefore, as disclosed in, for example, Japanese Utility Model Laid-Open No. 62-54812, the above-mentioned axial hole is usually urged along the inner peripheral surface of the axial hole having a flat part in part. The support shaft is formed with a support shaft flat portion corresponding to the shaft hole flat portion of the urging means, and the housing position of the light shield plate in the state where both flat portions are in contact with each other is formed. It is set.

By the way, in recent years, in order to effectively use resources and protect the environment, for example, as disclosed in Japanese Unexamined Patent Publication No. 5-65021, all parts constituting a sun visor can be formed from synthetic resin materials. I'm starting to be seen. With this configuration, when disposing of the sun visor that has reached the end of its useful life, it can be supplied as it is as a raw material for resource recovery without performing any pretreatment such as removing metal parts from it. Cost is reduced.

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 the line D of FIG. is there. First, as shown in FIG. 5, a sun visor 10 for an automobile includes an L-shaped support member 2 that is hung from a ceiling portion of a passenger compartment (not shown), and a light-shielding plate 3 connected to the support member 2.

A support shaft 21 that pivotally supports the light blocking plate 3 is formed in a horizontal portion of the support member 2. On the other hand, a bearing portion 31 is provided on the upper left portion of the light shielding plate 3, and a shaft hole 32 having an opening on the left side surface of the bearing portion 31 is bored in the longitudinal direction of the bearing portion 31. By fitting the support shaft 21 into the shaft hole 32 of the bearing portion 31 as described above, the light shielding plate 3 is rotatably supported around the support shaft 21.

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

In the conventional sun visor 10 as described above, a portion of the inner wall surface of the shaft hole 32 facing the frame portion 35 extends in the longitudinal direction of the bearing portion 31 to the center portion of the girder portion 34. The cut groove 4 is formed. A shaft 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 is provided with a support shaft flat surface 6 corresponding to the bearing flat surface 5. Therefore, in the state where the bearing portion 31 is fitted to the support shaft 21, the bearing portion 31 is rotated around the support shaft 21 so that the shaft hole flat surface 5 and the support shaft flat surface 6 are in contact with each other. The stable position is 3.

[0011]

[Problems to be solved by the device]

 The conventional synthetic resin-made sun visor 10 as described above has a structure in which a synthetic resin in a heating and melting state is placed in a mold including an upper mold and a lower mold in which a concave portion whose inner wall surface is the outer shape of the sun visor 10 is usually formed. It is manufactured by the so-called injection molding method, in which the raw materials are supplied by injection. Then, after the synthetic resin raw material is injected, the upper mold and the lower mold that have been united are separated from each other to remove the molded product, and the light shielding plate 3 portion of the sun visor 10 is completed.

By the way, since the bearing portion 31 having the shaft hole 32 is indispensable for the light shielding plate 3, a core M having a shaft hole shape is adopted, and the core M is preliminarily set in the mold before the raw material is injected. Is attached to. Then, after the mold is separated after the injection operation, the core M is removed from the bearing portion 31 and the shaft hole 32 is formed in the bearing portion 31, as shown by the chain double-dashed line in FIG.

However, the mounting operation of the core M before injection and the extracting operation of the core M after molding as described above are considerably troublesome, and particularly in the mounting operation, the core M is placed at a predetermined position. If it is not installed correctly, the finished shaft hole 32 may become slanted and the connection posture of the shading plate 3 to the support shaft 21 becomes abnormal, so the mounting operation of the core M in the mold is considerable. It will be a nervous task.

The present invention has been made to solve the above problems, and a shaft hole can be easily provided in a bearing portion without using a core, and as a result, man-hours can be reduced. It is an object of the present invention to provide a bearing structure for an automobile sun visor that can reduce manufacturing costs.

[0015]

[Means for Solving the Problems]

 In the bearing structure for a sun visor for automobiles according to claim 1 of the present invention, the light shielding plate is rotatably supported about a support shaft provided in the vehicle compartment, and an opening is provided at a side portion of the light shielding plate. And a bearing portion in which a shaft hole extending in the longitudinal direction is formed, a shaft hole flat surface extending in the longitudinal direction is provided in the shaft hole, and a supporting shaft flat surface corresponding to the bearing flat surface is provided in the support shaft. The above-mentioned bearing part is characterized in that a plurality of semi-circular bearings each having an open part on one side are integrally joined so that the directions of the open parts are alternated in a state of being displaced by an axial thickness. It is what

[0016]

[Action]

 According to the bearing structure for a sun visor for automobiles of the above-mentioned claim 1, a plurality of semi-circular bearings each having an opening portion on one side thereof are shifted by an axial thickness, and the directions of the opening portions alternate. Since the sun visor having such a bearing is manufactured by a molding method using a mold, the upper and lower molds are each provided with a semi-circular bearing. By alternately forming the inner surface shape and the outer surface shape of the mold, it is possible to easily perform the die cutting by simply separating the upper mold and the lower mold after the molding operation is completed, and the shaft hole is formed as in the past. It is not necessary to dispose the core for performing the molding in advance and to pull out the core after the molding process is completed, which can reduce the number of manufacturing steps.

In the bearing portion of the sun visor manufactured as described above, the shaft hole flat surface is 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. 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 rotated around the support shaft. When moved, the edge of the flat surface of the support shaft presses the flat surface of the shaft hole, and by this pressing, the notch groove is expanded and the bearing part in that part elastically deforms, and the bearing force is restored by this deformation. An urging force is generated on. The generation of this urging force makes it possible to obtain a feeling of moderation when the light shielding plate is rotated about 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 its useful life, it is supplied to the treatment facility as it is without any decomposition. It is possible to reduce the cost of waste treatment and promote the reduction of waste disposal, which can make a great contribution to the effective use of resources and environmental conservation. When the support shaft is made of metal, the waste treatment can be performed without disassembling the support member by simply removing the support member from the sun visor.

[0019]

【Example】

 1 is a partially cutaway side view showing an example of a sun visor to which the bearing structure according to the present invention is applied, and FIG. 2 is a partially enlarged exploded perspective view showing an example of the bearing structure part of FIG. First, as shown in FIG. 1, a sun visor 1 for an automobile is basically composed of an L-shaped support member 2 which is hung from a ceiling portion 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 pivotally supports the light shield plate 3 is formed in the horizontal portion of the support member 2, while a bearing portion 31 is provided in the upper left portion of the light shield plate 3. A shaft hole 32 having an opening on the left side surface of the bearing portion 31 is bored in the longitudinal direction of the bearing portion 31. By fitting the support shaft 21 into the shaft hole 32 of the bearing portion 31 as described above, the light shielding plate 3 is rotatably supported around the support shaft 21.

Then, the shading plate 3 is rotated around the support shaft 21 and flipped up, and the position in contact with the ceiling is set as the storage position, and is pulled out downward from this storage position. The shaded position is set as the light shielding position. Incidentally, FIG. 1 shows a state in which the light shielding plate 3 is in the light shielding position.

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

As shown in FIGS. 2 and 3, the bearing 31 has a plurality of semicircular bearings 30 each having an opening 30a so that the directions of the openings 30a alternate. Set and they are tied together. Therefore, each of the semicircular bearings 30 does not form a circular shaft hole, but when they are stacked, the open portions 30a are arranged alternately as shown in FIG. The shaft hole 32 is formed by the plurality of semicircular bearings 30.

In the case of this embodiment, the surface formed by the opening 30a is set substantially parallel to the light shielding plate 3, and the tops of the semicircular bearings 30 adjacent to each other are integrally formed with each other. They are joined together, and a bridge portion 30b is formed at this joined portion. Therefore, the tops of all the semicircular bearings 30 are in a state of being connected by the respective bridge portions 30b.

Further, the girder portion 34 extending from the lower portion of each bearing portion 31 has a base end portion 34a whose thickness is set at the root portion thereof, and the base end portion 34a has 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, and when the bearing portion 31 is viewed from the front side, as shown in FIG. As shown, the adjacent girders 34 form a groove-like portion 4a similar to the groove-like portion 4a shown in FIG.

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 flat surface 5 of the shaft hole is provided on the right semicircular bearing 30 shown in FIG. Further, in FIG. 3, the axial hole flat surface 5 is formed parallel to the groove-shaped portion 4a as described above, but it may be oblique.

On the other hand, the support shaft 21 is divided into a plurality of sections according to the span dimension of the bearing portion 31, that is, the width dimension of the unit semicircular bearing 30 in the horizontal direction, and the surface of the support shaft 21 is divided at each boundary of these sections. A locking ring 22 is formed so as to project therefrom. A support shaft flat surface 6 is formed in a portion where the surface of the support shaft 21 is in contact with the bearing flat surface 5 when the support shaft 21 is fitted in the shaft hole 32 of the bearing portion 31. Therefore, in the state where the bearing portion 31 is fitted to the support shaft 21, the locking ring 22 projects toward the open portion 30a side of the one semicircular bearing 30 and the inner peripheral edge of the other semicircular bearing 30. It is locked to the part and is prevented from coming out. The light shielding plate 3 is in a stable position when the bearing portion 31 is rotated around the support shaft 21 and the shaft hole flat surface 5 and the support shaft flat surface 6 are in contact with each other.

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 in which the light shielding plate 3 hangs from the support shaft 21, but the support shaft 2 It is also possible to set the stable position to the storage position of the light shielding plate 3 by forming the support shaft flat surface 6 of 1 horizontally.

In the present embodiment, three ribs 7 that are integral with the girder portion 34 that bulges outward in the width direction of the girder portion 34 are formed on the side surface portion of the girder portion 34. The rib 7 has an upper end portion in the drawing that hangs on a lower 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 parts such as the light shielding plate 3 including the frame portion 35 and the skin 33, and the bearing portion 31 are made of synthetic resin. Has been formed. Although polypropylene is specifically applied, it is not limited to polypropylene and includes, for example, polyethylene, polyvinyl chloride, polystyrene, acrylonitrile butadiene styrene, polymethyl methacrylate, polyethylene terephthalate, polyamide, polyacetal, polycarbonate, polyimide. , Polytetrafluoroethylene, etc. are applicable. Further, instead of applying the same synthetic resin material to all parts, an optimum synthetic resin material may be selected appropriately according to the characteristics of the parts.

Note that the support member 2 is often made of synthetic resin, but may be made of metal. The reason is that it is preferable that the support member 2 is as rigid as possible as a support member, and even if the support member 2 is made of metal, the bearing portion can be treated without disassembling the sun visor 1 during waste treatment. This is because it is possible to easily pull out the support member 2 from 31, and it is not so difficult to separate the metal and the synthetic resin during processing.

As described in detail above, the bearing structure of the present invention has a plurality of semi-circular bearings 30 in which the bearing portion 31 has the opening portion 30a on one side such that the directions of the opening portions 30a alternate. Since they are stacked, they can be easily manufactured by injection molding using a mold.

The ease of manufacture will be described below with reference to FIG. FIG. 4 is an explanatory view of a cross-sectional view showing an example of a mold for manufacturing the bearing portion, and particularly shows the surface of the bearing portion 31 taken along the line C-C. As shown in this figure, the mold K is composed of an upper mold K1 and a lower mold K2, and the surfaces of the two molds K1 and K2 facing each other are shown by stippling according to the three-dimensional shape of the bearing portion 31. A cavity K3 is formed.

Then, by injecting the synthetic resin raw material that is heated and melted in a state where the cavity K3 is formed by the mold K into the cavity K3, one semi-circular bearing 30 is placed in the cavity K3 of the upper die K1. And the other semi-circular bearing 30 is formed in the cavity K3 of the lower mold K2. In this case, the shaft hole 32 of the bearing portion 31 is formed between the two dashed lines. Then, the upper mold K1 and the lower mold K2 are separated to obtain the bearing portion 31 as shown in FIGS.

As described above, in the present invention, the bearing portion 31 is formed by arranging a plurality of semi-circular bearings 30 having the opening portion 30a on one side in a zigzag manner, and therefore, the conventional die It is not necessary to mount a core for forming the shaft hole 32 in K, and it is possible to form the shaft hole 32 in the bearing portion 31 by a single die-cutting operation. It is possible to omit the pulling-out operation of the core after molding, and as a result, it is possible to reduce the manufacturing man-hours of the sun visor 1, which can largely contribute to the reduction of the manufacturing cost.

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 above in detail, the bearing structure of the automobile sun visor of the present invention is provided with the bearing portion 31 having the opening portion at the side portion of the light shielding plate 3 and the axial hole 32 extending in the longitudinal direction. This bearing portion 31 is formed by stacking a plurality of semi-circular bearings 30 each having an open portion 30a so that the directions in which the open portions 30a face each other alternate. The groove portion 4a is formed between the girder portion 34 and the girder portion 34 of the other semi-circular bearing 30, and the axial wall flat surface 5 extending in the longitudinal direction is provided on the inner wall surface of the semi-circular bearing 30. A supporting shaft flat surface 6 corresponding to the bearing flat surface 5 is formed on the supporting shaft 21, and a rib 7 that extends outward in the depth direction of the groove is formed on a side surface portion of the girder portion 34 that extends in the longitudinal direction. Is formed.

Therefore, by fitting the support shaft 21 into 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. If the shaft hole flat surface 5 and the support shaft flat surface 6 contact each other with the support shaft 21 fitted in the bearing portion 31, the rotation of the light shielding plate 3 around the support shaft 21 is restricted. Since the combined state of the both is stable, the position setting may be performed so that the position of the light shielding plate 3 is the storage position or the light shielding position in the contact state.

From the state where 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 portion 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. Elastically deforms to function as a biasing means, and the groove portion 4a 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 with a slight response can be obtained. You can

Since most of the parts are made of synthetic resin, when the support member 2 is made of metal when the sun visor 1 is regenerated or incinerated, it is necessary to pull out the support member 2 from the light shielding plate 3 or Alternatively, when the support member 2 is also made of synthetic resin, the sun visor 1 can be directly supplied to the treatment facility without being disassembled, and the waste treatment cost can be significantly reduced.

[0040]

[Effect of device]

 As described above, according to the bearing structure of the automobile sun visor of the present invention, the bearing portion has a plurality of semi-circular bearings having an opening portion on one side, and the orientation of the opening portion is changed with the axial thickness shifted. Since the sun visors with such bearings are integrally formed in an alternating manner, the inner surface shapes of the semi-circular bearings should be used for the upper and lower molds, respectively, when manufacturing the sun visor with a mold using a molding method. By alternately forming the outer surface shape and the outer surface shape, it is possible to easily remove the mold by simply separating the upper mold and the lower mold after the molding operation is completed. Since it is not necessary to dispose the core in advance in the mold and to pull out the core after the molding process is completed, the number of manufacturing steps can be reduced, which is convenient.

In the bearing portion of the sun visor manufactured as described above, the shaft hole flat surface is 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 to the support shaft with the flat surface of the shaft hole and the flat surface of the support shaft in contact with each other, and the light shield plate is rotated around the support shaft, the edge of the flat surface of the support shaft will be The flat surface of the hole is pressed, and by this pressing, the notch groove is expanded and the bearing part in that part is elastically deformed, and the restoring force against this deformation generates a biasing force in the bearing part. When the light shielding plate is rotated around the support axis due to the generation of the force, a moderation feeling can be obtained.

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 its useful life, it is supplied to the treatment facility as it is without any decomposition. It is possible to reduce the cost of waste treatment and promote the reduction of waste disposal, which can make a great contribution to the effective use of resources and environmental conservation. When the support shaft is made of metal, the waste treatment can be performed without disassembling the support member by simply removing the support member from the sun visor.

[Brief description of 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.

4 is an explanatory view of a cross-sectional view showing an example of a mold for manufacturing the bearing portion, showing a cross-section taken along line C-C of FIG. 2. FIG.

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

FIG. 6 is an enlarged perspective view of a portion taken along line D in FIG.

[Explanation 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 lead-in hole 32 shaft hole 33 skin 34 girder part 34a base end 35 frame part 4 cut groove 4a Groove portion 5 Shaft hole flat surface 6 Support shaft flat surface 7 Rib K Mold K1 Upper mold K2 Lower mold

Claims (1)

[Scope of utility model registration request] 1. A light-shielding plate is rotatably supported around a support shaft provided in a vehicle compartment, and a shaft hole having an opening and extending in the longitudinal direction is formed at a side portion of the light-shielding plate. 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 an automobile sun visor, characterized in that a plurality of semi-circular bearings included therein are integrally coupled so that the directions of the open portions alternate in a state of being displaced by the axial thickness.