JP2012121406A - Vehicular sun visor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular sun visor which is improved so that when a circular section is broken, an edge portion of a broken region may not project to outside of a shell configuring member.SOLUTION: The vehicular sun visor 101 includes: a hollow sun visor body 103; two shell configuring members 103A and 103B which are connected together and form the hollow sun visor body 103; a shaft member 105 for attaching the sun visor 103 to a vehicle; and a bearing section 111 which is formed inside at least one shell configuring member 103B of the two shell configuring members 103A and 103B and which receives the shaft member 105. The bearing section 111 includes the circular section 113 which surrounds an outer circumference of the shaft member 111. A fragile section 121 is formed in the circular section 113, and the fragile section 121 is set at a part close to a connection region of the two shell configuring member 103A and 103B in a circumference direction of the circular section 113.

Description

  The present invention relates to a vehicle sun visor.

  Japanese Patent Laying-Open No. 2003-182360 (Patent Document 1) discloses a shaft member for attaching a sun visor body to a vehicle, and a bearing portion that is formed inside the sun visor body and receives the shaft member. The hollow sun visor main body is formed by joining two resin-made shell constituent members to each other. The bearing portion is integrally formed on the inner side of one shell constituent member at a position close to the upper edge of the joining region of the shell constituent member. The bearing portion has a circular annular portion, and the shaft member and the sun visor body are connected by inserting the shaft member into the annular portion.

  In the bearing structure configured as described above, when an external force (impact) is applied to the sun visor body, the most fragile portion of the annular portion in the circumferential direction is pushed by the shaft member and fractured, and two The upper edge side joining area | region of a shell structural member may be pulled apart. The annular part is usually formed integrally with the shell constituent member when the shell constituent member is molded, and a joining trace of a joining point of the molten resin called a weld line is generated in the annular part during the molding. Since this weld line is inferior in strength to other regions constituting the annular portion, the annular portion breaks starting from the weld line when an external force (impact) is applied. When a sun visor is used, when a forward external force (impact) is applied to the sun visor body, the annular portion receives a force obliquely upward from the shaft member, that is, in a direction toward the upper edge side joining region of the shell constituent member. For this reason, when the fracture of the annular portion occurs at a location relatively separated from the upper edge side joining region of the shell component member, the fracture portion having the longer circumferential length is stretched and the fracture end portion of the shell component member is expanded. There is a possibility of protruding outward from the upper edge side mating surface.

JP 2003-182360 A

  The present invention has been made in view of the above-described problem, and provides an improved vehicle sun visor so that, when an annular portion is broken, an end portion of the broken portion does not protrude outside the shell constituent member. That is the purpose.

  To achieve the above object, according to a preferred embodiment of a vehicle sun visor according to the present invention, a hollow sun visor body, two shell structures joined together to form the hollow sun visor body, and a sun visor body A shaft member for attaching the motor to the vehicle, and a bearing portion formed inside at least one of the two shell constituent members for receiving the shaft member. The bearing portion has an annular portion that surrounds the outer periphery of the shaft member, and a weak portion is set in the annular portion. The fragile portion is set at a location close to the joining region of the two shell constituent members in the circumferential direction of the annular portion. Here, the “adjacent point” refers to the circumferential length from the fracture end surface of one fractured part and the other fractured part in the circumferential direction of the annular part when viewed from the joining region of the two shell constituent members. This is the case where the lengths are approximately equal.

  According to the present invention, by setting the fragile portion in the annular portion, when the annular portion breaks due to an external force (impact) acting on the sun visor body, it is possible to specify the fracture location of the annular portion. In this invention, the said weak part is set to the location nearest to the joining area | region of two shell structural members among the circumferential direction area | regions of an annular part. For this reason, when an external force (impact) acts on the sun visor body and the annular portion is broken from the weakened portion, even if the broken portion after being broken is pushed and stretched by the shaft member, the stretched length at that time Becomes short, and the broken end surface of the broken portion does not reach the separated mating surfaces of the two shell components, or rather is separated. Thereby, it can prevent that the fracture | rupture end surface of the torn | ruptured annular part protrudes outside from the mating surface by which the two shell structural members were separated.

  Moreover, according to this invention, a weak part can be comprised by either one of a thin part, a ditch | groove, or both.

  According to the present invention, an improved vehicle sun visor is provided so that, when the annular portion breaks, the end portion of the broken portion does not protrude to the outside of the shell constituent member.

It is a front view showing the composition of the sun visor for vehicles concerning the embodiment of the present invention. It is a front view which shows the inside of one shell structural member in which the bearing part was formed. It is an enlarged front view which shows a bearing part. It is an expansion perspective view which shows the annular part of a bearing part. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is C arrow line view of FIG. It is a figure explaining the aspect of a fracture | rupture of an annular part in steps.

  Hereinafter, an automobile sun visor according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall configuration of a vehicle sun visor according to the present embodiment. As shown in FIG. 1, a vehicle sun visor 101 according to the present embodiment is a generally rectangular sun visor main body 103 that constitutes the outer shape of the sun visor 101 and a sun visor main body 103 for mounting the sun visor main body 103 on a vehicle. It is mainly composed of a support shaft 105 having a circular cross section. The support shaft 105 corresponds to the “shaft member” in the present invention. The support shaft 105 is formed in a substantially L shape having a vertical axis portion 105a extending in a substantially vertical direction and a horizontal shaft portion 105b extending in a generally horizontal direction. The horizontal shaft portion 105b of the support shaft 105 is attached to a bearing portion 111 built in one corner of the upper edge portion of the sun visor main body 103, whereby the sun visor main body 103 is relatively moved around the axis of the horizontal shaft portion 105b. It can be turned freely. The longitudinal axis portion 105a of the support shaft 105 is rotatably attached to the front corner portion of the passenger compartment ceiling surface 110 via the mounting bracket 107 so that the longitudinal direction of the sun visor body 103 is the left-right direction of the vehicle.

  The sun visor 101 mounted on the vehicle interior ceiling surface 110 is rotated around the axis of the horizontal shaft portion 105b, so that the storage position is set along the vehicle interior ceiling surface and the windshield is placed along the windshield. The arrangement position can be changed with respect to the light shielding position. Moreover, the sun visor 101 can change the arrangement position between the front position and the side position along the side glass by rotating around the axis of the vertical axis portion 105a. The sun visor body 103 has a support shaft 109 on the free end side of the upper edge. The support shaft 109 is held by a hook (not shown for convenience) attached to the ceiling surface of the passenger compartment. This stabilizes the rotation operation of the sun visor body 103 when the arrangement position of the sun visor 101 is changed from the storage position to the light shielding position or from the light shielding position to the storage position. For convenience of explanation, the major axis direction of the horizontal axis portion 105b is referred to as the left-right direction, the major axis direction of the vertical axis portion 105a is referred to as the vertical direction, and the horizontal direction intersecting with the major axis direction of the vertical axis portion 105a is referred to as the front-back direction.

  As shown in the cross-sectional view of FIG. 8, the sun visor body 103 has a hollow shell structure by joining two half-divided synthetic resin body members 103A and 103B opposite to each other in the front-rear direction. The outer surface is covered with the skin 104. That is, the sun visor body 103 has a hollow internal space. The two main body constituting members 103A and 103B correspond to “two shell constituting members” in the present invention. FIG. 2 shows a state in which the main body constituent member 103A on one side (rear side when the sun visor main body 103 is placed in the use area as viewed from the driver's seat side) is omitted, that is, only the main body constituent member 103B on the other side (front side). Show.

  Inside the sun visor main body 103, a bearing portion 111 that receives the horizontal shaft portion 105b of the support shaft 105 is formed. As shown in FIG. 3 in which a part of FIG. 2 is enlarged, the bearing portion 111 is integrated with the inside of the main body constituent member 103B on the front side (the internal space side formed by joining the two main body constituent members 103A and 103B). Three annular portions 113, 115, 117 and an elastic clip mounting portion 119 that are formed and arranged at predetermined intervals in the longitudinal direction of the sun visor main body 103 (long axis direction of the horizontal shaft portion 105b), and the rear main body The component member 103 </ b> A is formed integrally with two annular portions (not shown for convenience) arranged at a predetermined interval in the longitudinal direction of the sun visor main body 103. The three annular portions 113, 115, 117 on the front body constituent member 103B side are each formed to have a circular hole into which the horizontal shaft portion 105b can be inserted, and when the front body constituent member 103B is molded. The main body constituting member 103B is integrally formed with the elastic clip attaching portion 119. The two rear annular portions are each formed to have a circular hole into which the horizontal shaft portion 105b can be inserted. When the rear main body constituent member 103A is molded, the rear main body constituent member 103A is integrally formed. Is done.

  The three annular portions 113, 115, 117 of the front body constituent member 103B and the two annular portions of the rear body constituent member 103A are axially aligned when the front and rear body constituent members 103A, 103B are joined. Are arranged so as to overlap with each other coaxially. In the arrangement state, the horizontal shaft portion 105b of the support shaft 105 is inserted into a total of five annular portions 113, 115, 117 constituting the bearing portion 111 from the right side of the drawing and is supported so as to be relatively rotatable. When viewed from the insertion direction of the horizontal shaft portion 105b, the two annular portions 113 and 115 are arranged close to each other at a predetermined interval on the front side (the right side in the drawing) on the front body constituting member 103B side, and the back side ( One annular portion 117 is disposed on the left side of the figure with the clip attachment portion 119 interposed therebetween. On the other hand, one (near side) of the annular parts on the rear body constituent member 103A side is disposed between the two annular parts 113, 115 on the front side main body constituent member 103B side, and the other one ( (The back side) is disposed adjacent to the back annular portion 117 on the front main body constituting member 103B side. An elastic clip (not shown) is inserted into the horizontal shaft portion 105b so as to be inserted from above between the annular portion 115 on the near side and the annular portion 117 on the back side. A load torque (rotation resistance) is applied to the sun visor body 103 that is rotated around the axis of the horizontal shaft portion 105b. In addition, although the leg part as an insertion end part is attached to the elastic clip attachment part 119 of the bearing part 111, since the structure and attachment structure of an elastic clip are not directly related to this invention, an elastic clip is demonstrated. Is omitted.

  As indicated by arrows in FIG. 8, when a forward external force (impact) is applied to the rear surface of the sun visor main body 103, each annular portion 113, 115, 117 is obliquely upward from the horizontal shaft portion 105b, that is, the main body constituting member 103A. , 103B receives a force in a direction toward the upper edge side joining region. In this case, among the five annular portions 113, 115, 117, the annular portion 113 on the most entrance side as viewed from the insertion direction of the horizontal shaft portion 105 b receives a larger force than the other four annular portions 115, 117. For this reason, the annular portion 113 on the most entrance side is formed with a larger lateral width (length in the axial direction) than the other four annular portions 115 and 117 (see FIGS. 3 and 4).

  In the annular portion 113 at the most entrance, a fracture inducing portion is provided at a location facing the upper edge joining region 130 in the circumferential direction (see FIG. 8), that is, at a location close to the upper edge joining region 130. 121 is formed. The fracture inducing part 121 corresponds to a “fragile part” in the present invention. As shown in FIG. 4 to FIG. 7, the fracture inducing portion 121 includes a concave groove 123 extending from one side surface in the lateral width direction (axial direction) with a predetermined depth, and a thin portion continuous with the concave groove 123 in the lateral width direction. 125. The thin portion 125 is set by dropping a part of the meat on the outer surface side.

  The vehicle sun visor 101 according to the present embodiment is configured as described above. Therefore, the sun visor main body 103 can be moved from the storage position to the use area by rotating the sun visor main body 103 around the horizontal shaft portion 105b of the support shaft 105 for use. In addition, the sun visor body 103 can be used in a state of being moved from the windshield side to the side glass side by turning the sun visor body 103 around the longitudinal axis portion 105a of the support shaft 105, and is placed on the side glass side. Then, by sliding the sun visor main body 103 in the long axis direction of the horizontal axis portion 105b, the relative position (light shielding position) with respect to the side glass can be changed and used.

  When the sun visor body 103 is placed in the use area, as shown by an arrow in FIG. 8, when a forward external force (impact) acts on the rear surface of the sun visor body 103 below the bearing portion 111, The portions 113, 115, 117 receive a force in a direction obliquely upward from the horizontal shaft portion 105b. At this time, among the five annular portions 113, 115, 117, the annular portion 113 on the most entrance side close to the base portion of the horizontal shaft portion 105b receives a large force. In the present embodiment, among the five annular portions 113, 115, 117 of the bearing portion 111 that receives the horizontal shaft portion 105b, the fracture inducing portion 121 is set in the annular portion 113 on the most entrance side. For this reason, the annular portion 113 on the most entrance side is broken from the breakage inducing portion 121 having the weakest strength. It should be noted that the strength of the breakage inducing portion 121 is set to be weaker than the strength of the molten resin joining portion called a weld line generated in the annular portion 113 during molding.

  According to the present embodiment, the breakage inducing portion 121 of the annular portion 113 is close to the upper edge joining region 130 of the main body constituting members 103A and 103B. In other words, the breakage inducing portion 121 of the annular portion 113 is viewed in the circumferential direction of the annular portion 113 when viewed from the upper edge side joining region 130 of the two main body constituting members 103A and 103B (as viewed from the extended plane of the mating surface). From the broken end surface of one broken portion 113a (the left side in FIG. 8 separated from the inner surface of the main body constituting member 103B) and the other broken portion 113b (the right side in FIG. 8 joined to the inner surface of the main body constituting member 103B) after the break Are set at locations where the circumferential lengths are substantially equal. For this reason, in the broken annular part 113, the length of the broken part 113a pushed and stretched by the horizontal shaft part 105b becomes short, and the broken end face of the broken broken part 113a has two main body constituting members 103A, The separated mating surface of 103B will not be reached or will be separated (see FIG. 8). That is, according to the present invention, it is possible to prevent the broken end surface of the broken annular portion 113 from protruding outward from the mating surfaces to which the main body constituting members 103A and 103B are separated.

  In this case, in the present embodiment, the breakage inducing portion 121 includes a concave groove 123 extending from one side surface of the annular portion 113 to the other side surface with a predetermined depth, and a thin portion 125 continuous to the concave groove 123. It is composed. For this reason, it is possible to induce a crack generated from the concave groove 123 in the lateral width direction (axial direction) by the thin portion 125.

  In addition, since the external force (impact) which acted on the sun visor main body 103 is absorbed when the annular portion 113 on the most entrance side is broken, the other four pieces located on the back side from the annular portion 113 on the most entrance side are absorbed. The influence of external force (impact) is small on the annular portions 115 and 117, and it does not reach the point of breaking. For this reason, in the present embodiment, the fracture inducing portion 121 is not set for the other four annular portions 115 and 117, but the setting of the fracture inducing portion 121 with respect to the other four annular portions 115 and 117 is performed. Is not to deny.

Further, in the present embodiment, the breakage inducing portion 121 is configured by a combination of the concave groove 123 and the thin portion 125. However, the present invention is not limited to this configuration. May be. Moreover, you may comprise the fracture | rupture induction | guidance | derivation part 121 by holes, a slit, etc. other than the ditch | groove 123 and the thin part 125, for example.
Moreover, in this Embodiment, although the cyclic | annular part 113 in which the fracture | rupture induction | guidance | derivation induction part 121 was formed was demonstrated to the case where it set to the main body structural member 103B of the front side, it changed into this structure and the cyclic | annular form in which the fracture | rupture induction part 121 was formed was formed. The portion 113 may be set to the rear main body constituting member 103A. Further, in the present embodiment, the bearing portion 111 is formed so as to straddle both the front and rear main body constituting members 103A and 103B, but may be formed on either one of the main body constituting members 103A or 103B. Good.

In view of the gist of the present invention, the following aspects can be configured.
(Aspect 1)
“The vehicle sun visor according to claim 1,
The vehicular sun visor is characterized in that the fragile portion is set at a location facing the upper edge side joining region of the two shell constituent members. "

(Aspect 2)
"The vehicle sun visor according to claim 1 or aspect 1,
The fragile portion is continuous with a concave groove extending from one side surface to the other side surface of the annular portion at a predetermined depth, and the concave groove in a lateral width direction, and drops a part of the outer surface of the annular portion. The vehicle sun visor is characterized by comprising the thin-walled portion 125 formed in this way. "

DESCRIPTION OF SYMBOLS 101 Sun visor 103 for vehicles Sun visor main body 103A Main body structural member (shell structural member)
103B Body component (shell component)
104 Skin 105 Support shaft (shaft member)
105a Vertical axis portion 105b Horizontal axis portion 107 Mounting bracket 109 Support shaft 110 Cabin ceiling surface 111 Bearing portion 113 Annular portion 113a at the most entrance side Broken portion 113b Broken portions 115, 117 Other annular portions 119 Clip attachment portion 121 Breaking induction portion (Vulnerable part)
123 Concave groove 125 Thin portion 130 Upper edge side joining region

Claims (2)

A hollow sun visor body,
Two shell components joined together to form the hollow sun visor body;
A shaft member for attaching the sun visor body to the vehicle;
A bearing portion that is formed inside at least one shell component of the two shell components and receives the shaft member;
The bearing portion has an annular portion surrounding the outer periphery of the shaft member,
A fragile portion is formed in the annular portion, and the fragile portion is set at a location close to a joining region of the two shell constituent members in a circumferential direction of the annular portion. . The vehicle sun visor according to claim 1,
The vehicular sun visor is characterized in that the fragile portion is constituted by one or both of a thin portion and a concave groove.

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