JP4166913B2 - Automotive sun visor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in an automobile sun visor that is provided on the driver's seat and passenger's seat side of an automobile and mainly blocks sunlight.
[0002]
[Prior art]
As this type of conventional sun visor, for example, there is one shown in JP-A-11-157334.
Although not specifically shown in the drawings, the conventional sun visor includes a mounting arm that is fixed to the ceiling of the vehicle body, and a sun visor body that is rotatably supported by the mounting arm via a bearing member. The bearing member includes a bearing portion that fits the tip end portion of the mounting arm, a spring member that repels the sun visor body to a non-use position, and a damper device that attenuates the resilience of the spring member to the sun visor body. It has a configuration.
[0003]
Therefore, under the conventional sun visor, when the sun visor main body is rotated and rotated toward the vehicle body ceiling, the non-use state is obtained, and conversely, when the sun visor is rotated toward the windshield, the use state is obtained. However, especially when the sun visor body is rotated from the use position to the non-use position, even if the sun visor body tries to rotate suddenly due to the spring force of the spring member, the presence of the damper device exists. Therefore, the spring force of the spring member can be attenuated, so that the sun visor body is prevented from rotating suddenly, and the sun visor body collides with the ceiling of the vehicle body and generates a hitting sound. Can be reduced.
[0004]
[Problems to be solved by the invention]
However, the damper device in the conventional sun visor employs an oil damper method in which an oil chamber is formed in the damper case and one resistance blade provided on the mounting arm side is rotated inside the oil chamber. For this reason, in order to obtain a high braking force under this oil damper method, for example, the oil chamber can be enlarged and the length of the resistance blades can be increased. As a damper device used for the visor, the size is inevitably restricted, and as a result, a high braking force cannot be obtained.
[0005]
[Means for Solving the Problems]
The present invention was developed in order to effectively solve the problems of the conventional sun visor. The invention according to claim 1 is a mounting arm fixed to the ceiling of a vehicle body, and a bearing on the mounting arm. A sun visor body that is rotatably supported via a member, the mounting arm is provided with a convex portion projecting in a radial direction at a tip portion thereof, and the bearing member includes a bearing portion that fits the mounting arm; A spring member that repels the sun visor body at a non-use position, a cylinder cylinder portion that opens to a side perpendicular to the fitting direction of the mounting arm with respect to the bearing portion, a piston that protrudes and retracts in the cylinder cylinder portion, and the piston A spring urging in a direction protruding from the opening in the tube portion, and immediately before the sun visor body rotates to the non-use position, the convex portion of the mounting arm causes the piston to move to the spring. Adopting a configuration for pressing against the spring pressure.
[0006]
According to a second aspect of the present invention, on the premise of the first aspect, the head portion of the piston forms a tapered surface with respect to the axis of the cylinder cylindrical portion, and the mounting arm extends from a lower direction to a higher direction of the tapered surface. The convex part of this contact | abutted and the contact with respect to the taper surface adopted the structure which moves back and forth exceeding the axis line of a cylinder cylinder part.
[0007]
The invention according to claim 3 is based on claim 1 and is provided with a plurality of bearing portions on the bearing member to form a cylinder tube portion for projecting and retracting the piston between adjacent bearing portions, while the tip end portion of the mounting arm is The structure which provided the recessed part which accept | permits the passage of a convex part in the bearing part inserted toward the main body side of a bearing member was employ | adopted.
[0008]
Therefore, in the invention described in claim 1, since the compression damper that linearly reciprocates between the piston that protrudes and retracts in the cylinder cylindrical portion and its biasing spring is configured, the movement of the piston can be achieved without increasing the size of the damper itself. By simply increasing the stroke, a high braking force that attenuates the elastic force of the spring member can be obtained.
[0009]
In the invention of claim 2, since the taper surface is formed on the head of the piston, when the taper surface abuts the convex portion of the mounting arm, the moving stroke of the piston can be increased. Can provide stable and high braking force. In the invention according to claim 3, since the bearing surface of the bearing portion that receives the reaction force of the spring that urges the piston can be widened, reliable bearing performance can be ensured.
[0010]
In the present invention, if a notch surface is formed on the outer peripheral surface of the mounting arm and a gripping surface that is in surface contact with the notch surface is formed on the spring member, the sun visor body can be used when the sun visor body is not in use. Can be securely held in the unused position.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to preferred embodiments illustrated in the drawings. The vehicle sun visor according to the first embodiment is also L-shaped fixed to the vehicle body ceiling as shown in FIG. The mounting arm 1 and the sun visor body 2 that is rotatably supported by the mounting arm 1 via the bearing member 5 are characterized in that the following configuration is adopted. is there.
[0012]
First, as shown in FIG. 2, the mounting arm 1 is integrally provided with a convex portion 3 that protrudes in the radial direction at the tip thereof, and the convex portion 3 is a piston 13 that will be described later according to the rotation of the sun visor body 2. The flat cut-out surface 4 is formed on each of the opposing sides of the outer peripheral surface near the convex portion 3.
[0013]
Further, as shown in FIG. 3, the bearing member 5 provided in the sun visor body 2 is formed in a substantially rectangular shape, and three bearing portions 6a into which the mounting arm 1 is inserted and fitted on the upper side. 6b and 6c are formed, and a space 7 for fixing a spring member 11 to be described later is formed between the first and second bearing portions 6a and 6b, and between the second and third bearing portions 6b and 6c. A cylinder cylinder portion 8 that houses a piston 13 and a coil spring 15 to be described later is formed, and a support portion 9 that supports the end portion of the wire frame of the sun visor body 2 is formed at both ends, In particular, with respect to the first and second bearing portions 6 a and 6 b into which the distal end portion of the mounting arm 1 is inserted, the concave portion 10 that allows the convex portion 3 of the mounting arm 1 to pass is directed toward the main body side of the bearing member 5. Shall be provided.
[0014]
The spring member 11 fixed in the space 7 between the first and second bearing portions 6a and 6b is formed of a thin metal plate in a hollow shape that can be elastically expanded so that the mounting arm 1 can be inserted therein. Thus, when the sun visor body 2 is rotated from the use position to the non-use position, the holding face 12 that is in surface contact with the respective cut-out faces 4 of the mounting arm 1 is formed on the opposite side face. Makes the sun visor body 2 rotate to the non-use position by contacting the notch surface 4 of the mounting arm 1 and the gripping surface 12 completely contacts the notch surface 4 so that the sun visor body 2 is It is configured to securely hold in that position.
[0015]
Further, the piston 13 accommodated in the cylinder tube portion 8 between the second and third bearing portions 6b and 6c so as to be able to protrude and retract is formed with a tapered surface 13a with respect to the axis of the cylinder tube portion 8, and An O-ring 14 is mounted on the outer periphery, and the compression damper is configured by being constantly urged by the spring pressure of the coil spring 15 in a direction protruding from the opening of the cylinder tube portion 8. For this reason, it is assumed that the silicone oil is applied to the inner peripheral surface of the cylinder tube portion 8 and an orifice 16 is formed at the bottom portion for urging air in and out. In addition, the opening of the cylinder cylinder part 8 which accommodates the piston 13 is in a state orthogonal to the fitting direction of the mounting arm 1 with respect to the bearing part.
[0016]
Therefore, when the mounting arm 1 and the bearing member 5 are assembled, the lower portion of the spring member 11 is fixed in the space 7 in advance, and the coil spring 15 and the piston 13 are accommodated in the cylinder tube portion 8. Then, if the tip 3 of the mounting arm 1 is inserted and fitted to the second and third bearing portions 6b and 6c from the first bearing portion 6a through the inside of the spring member 11 while making the convex portion 3 and the concave portion 10 coincide with each other, As a result, as shown in FIG. 4, the mounting arm 1 and the bearing member 5 are assembled. When the mounting arm 1 is inserted into the third bearing portion 6c, the high position of the tapered surface 13a of the head of the piston 13 is high. If the tip of the mounting arm 1 is passed while pushing down the side with a finger, it can be easily assembled. Further, fitting the mounting arm 1 to the three bearing portions 6a, 6b, and 6c widens the bearing surface of the bearing portion that receives the reaction force of the coil spring 15 that urges the piston 13, so that a reliable bearing can be obtained. Can guarantee performance.
[0017]
Therefore, even under the sun visor having such a configuration, when the sun visor body 2 is rotated and rotated toward the ceiling of the vehicle body, the unused state is obtained. The use state can be obtained, but in the use state, as shown in FIG. 5, the convex portion 3 of the mounting arm 1 is not in contact with the head of the piston 13 constituting the compression damper. The piston 13 protrudes from the opening of the cylinder tube portion 8 by the spring pressure of the coil spring 15 and comes into contact with the general surface of the tip portion of the mounting arm 1.
[0018]
Then, when the sun visor main body 2 is rotated from its use position to the non-use position, immediately before the notch surface 4 on the mounting arm 1 side and the gripping surface 12 on the spring member 11 side start to contact, The visor body 2 tries to rotate suddenly to the non-use position by the elastic force of the spring member 11. At this time, as shown in FIG. 6, the convex portion 3 of the mounting arm 1 is the tapered surface of the head of the piston 13. The piston 13 is pressed downward against the spring pressure of the coil spring 15 while abutting 13a from the low direction to the high direction and moving the contact point back and forth beyond the axis of the cylinder tube 8 To do. For this reason, the elastic force of the spring member 11 against the sun visor body 2 is effectively damped and the sun visor body 2 is prevented from rotating rapidly, so that the sun visor body 2 collides with the ceiling of the vehicle body. Therefore, it is possible to effectively prevent the hitting sound from being generated.
[0019]
In other words, in the first embodiment, the compression damper that linearly reciprocates with the piston 13 that protrudes and retracts in the cylinder tube portion 8 and the biasing coil spring 15 is configured. Thus, like a conventional oil damper, Even without increasing the size of the damper itself, it is possible to obtain a high braking force that attenuates the elastic force of the spring member 11 simply by increasing the movement stroke of the piston 13. Further, since the taper surface 13a is formed on the head of the piston 13, when the taper surface 13a and the convex portion 3 of the mounting arm 1 come into contact with each other, the moving stroke of the piston 13 can be increased. However, a stable and high braking force can be provided.
[0020]
Next, the automobile sun visor according to the second embodiment will be described. The second embodiment basically follows the first embodiment described above, but is different. As shown in FIG. 7, the tip end portion having the convex portion 3 of the mounting arm 1 is divided, and the split tip end portion 1a and the split end 1b of the mounting arm 1 are integrally fitted later. In addition, there is a configuration in which a concave portion 10 that allows passage of the convex portion 3 of the divided tip portion 1a is formed only on the third bearing portion 6c side.
[0021]
Therefore, under the second embodiment, the mounting arm 1 is inserted from the first bearing portion 6a side and is fitted to the first bearing portion 6a and the second bearing portion 6b, and the divided tip end portion 1a is Although inserted from the third bearing portion 6c side and fitted to the split end 1b of the mounting arm 1 between the second and third bearing portions 6b and 6c, the third bearing portion 6c is fitted. Since the convex portion 3 is provided on the divided tip end portion 1a side, the assembling property of the mounting arm 1 with respect to the bearing member 5 is improved and the convex portion 3 is relatively large as compared with the first embodiment. Since it is possible to set, it is possible to obtain a higher braking force by further increasing the movement stroke of the piston 13.
[0022]
【The invention's effect】
As described above, according to the present invention, by adopting the above-described configuration, under the first aspect of the present invention, the compression damper that linearly reciprocates between the piston that moves in and out of the cylinder cylindrical portion and its biasing spring is configured. Even if it is not, a high braking force that attenuates the elastic force of the spring member can be obtained only by increasing the moving stroke of the piston.
[0023]
Since the taper surface is formed in the head of the piston under claim 2, when the taper surface and the convex portion of the mounting arm come into contact with each other, the moving stroke of the piston can be increased, so that it is stable and high. Can provide braking force. Under the third aspect, the bearing surface of the bearing portion that receives the reaction force of the spring that biases the piston can be widened, so that reliable bearing performance can be ensured.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an automobile sun visor according to a first embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the main part structure.
FIG. 3 is a cross-sectional view showing only a bearing member.
FIG. 4 is a cross-sectional view showing a state where the mounting arm is assembled to the bearing member side.
FIG. 5 is a main part explanatory view showing a state in which the sun visor main body is rotated to a use position.
FIG. 6 is a main part explanatory view showing a state where the sun visor body is rotated to a non-use position.
FIG. 7 is an exploded perspective view showing a main structure of an automobile sun visor according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Mounting arm 1a Division | segmentation front-end | tip part 1b Division | segmentation end 2 Sun visor main body 3 Convex part 4 Notch surface 5 Bearing member 6a First bearing part 6b Second bearing part 6c Third bearing part 7 Space 8 Cylinder cylinder part 9 Support part 10 Recessed part 11 Spring member 12 Holding surface 13 Piston 13a Tapered surface 14 O-ring 15 Coil spring 16 Orifice

Claims (3)

A mounting arm that is fixed to the ceiling of the vehicle body; and a sun visor body that is rotatably supported by the mounting arm via a bearing member. The bearing member includes a bearing portion that fits the mounting arm, a spring member that repels the sun visor body at a non-use position, and a cylinder tube portion that opens to the side perpendicular to the fitting direction of the mounting arm with respect to the bearing portion. And a piston that protrudes and retracts in the cylinder tube portion, and a spring that biases the piston in a direction protruding from the opening in the cylinder tube portion, immediately before the sun visor body rotates to the non-use position, A sun visor for an automobile, wherein the convex portion of the mounting arm presses the piston against the spring pressure of the spring. The head of the piston forms a tapered surface with respect to the axis of the cylinder tube, and the convex portion of the mounting arm abuts from the low direction to the high direction of the tapered surface. 2. The vehicle sun visor according to claim 1, wherein the vehicle sun visor moves back and forth beyond the axis of the tube portion. A plurality of bearing portions are provided on the bearing member to form a cylinder tube portion in which a piston protrudes and retracts between adjacent bearing portions, and a recess portion that allows a convex portion to pass through the bearing portion into which the tip end portion of the mounting arm is inserted. The automobile sun visor according to claim 1, wherein the sun visor is provided toward the main body side of the bearing member.

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