JP4729724B2 - Sun visor structure for vehicles - Google Patents

Description

  The present invention relates to a vehicle sun visor structure that is adapted to shield light emitted from the front or side of a driver's seat or passenger seat of a vehicle, such as sunlight and headlights of an oncoming vehicle.

  As shown in FIGS. 13 to 15, this type of conventional vehicle sun visor structure includes a shaft a having a two-sided width a-1 that is rotatably mounted on a vehicle body (not shown) via a bracket h, and a shaft. a support c for rotatably supporting a and attaching a sun visor body (not shown), a spring body e extending over the shaft a and a spring body d connected to the spring mounting portion d of the support c. Springs g having bifurcated spring pieces f1 and f2, and flat surfaces g-1 and g-2 for sandwiching the two-face width a-1 of the shaft a are formed on the spring body e of the spring g. It is composed.

  Further, a locking piece f1-1 is formed by cutting and raising at the tip of one spring piece portion f1 of the spring g, and the tip of the locking piece f1-1 serves as a spring mounting portion d of the support c. While being locked, the tip of the other spring piece portion f2 is bent in the direction of the one spring piece portion f1 to form a lock piece f2-1, and the lock piece f2-1 is the lock piece. By locking f1-1, the spring g is mounted on the spring mounting portion d.

  In such a configuration, the flat surfaces g-1 and g-2 of the spring g sandwich the two-surface width a-1 of the shaft a so that the flat surface g-1 of the spring g and the two-surface width a-1 of the shaft a. g-2 hits the surface and generates a torque on the spring g, thereby holding the retracted position of the sun visor body b (see FIG. 16).

In order to put the sun visor body against the urging force of the spring g from the retracted position of the sun visor body, the sun visor body is made to resist the urging force of the spring g. The sun visor body is opposed to the incident direction of the irradiation light to shield the irradiation light (see Patent Documents 1 to 3).
JP-A-9-226367 JP-A-9-265649 JP 2001-150949A.

  However, the mounting structure of the spring g to the spring mounting part d locks the locking piece f1-1 formed by cutting and raising the tip of one spring piece part f1 to the spring mounting part d and the other. Since the locking piece f2-1 formed by bending the tip of the spring piece portion f2 is configured to be locked to the locking piece f-1, when the sun visor body is rotated, As shown in FIG. 17, the spring g is expanded on the shaft a, so that stress concentrates on the engaging portions of the engaging pieces f <b> 1-1 and the engaging pieces f <b> 2-1, and the engaging portions are cracked. In the operation durability test of the sun visor body during the manufacturing process, the spring g may be cracked, and when the spring g is pushed back by the shaft a in this way, the spring g is also sprung. Crack in the g is likely to occur, had gotten a process defect in the manufacturing process.

  Therefore, the present invention provides a spring mounted on the support spring mounting portion so that the mounting structure does not cause stress concentration when the sun visor body rotates, so that cracks do not occur in the operation durability test of the sun visor body. Thus, an object of the present invention is to provide a vehicle sun visor structure adapted to provide a product that can withstand an operation durability test in a manufacturing process.

A vehicle sun visor according to the present invention includes a shaft that is rotatably mounted on a vehicle body, a support that is rotatably supported by the shaft and to which a sun visor body is attached, a spring main body that straddles the shaft, and the spring. A spring having a pair of spring pieces formed in a bifurcated shape and connected to a spring mounting portion provided on the support by being connected to the main body portion, and the two spring main body portions sandwich the shaft. A sun visor structure for a vehicle configured to maintain the retracted state of the sun visor body, wherein the entire tip of one spring piece portion of the pair of spring piece portions is bent toward the other spring piece portion side. to form a hook piece portion, in a state where the the cited hooking piece hooked from the outside of the distal end portion of the other spring piece portion, and mounting the spring in the spring mounting portion, Furthermore, a pair of slits are formed in the spring body portion so as to be close to the inner side of the flat surface formed so as to face the chamfered portion of the shaft, and both the slits have end portions thereof. Are connected to each other at the other spring piece portion, and the one spring piece portion has a stopper piece portion bent outward, and the stopper piece portion is connected to the spring mounting portion. In the state where both the spring pieces are fitted, the support is configured to be in contact with the upper surface of the connecting piece in the support .

  Here, the sun visor body may be configured by encapsulating a sun visor skin such as a woven fabric, a non-woven fabric, or a PVC sheet on the outer surface of a resin core made of an injection molded body or a bead foam molded body.

  Further, the support to which the sun visor body is attached is made of a synthetic resin molded body such as PP, and has a bearing hole. The shaft is rotatably supported in the bearing hole so that the shaft is rotated around the shaft axis. The sun visor body may be configured to be rotatable along the axis.

  According to the present invention configured as described above, the mounting structure of the spring to the spring mounting portion forms the hooking piece portion by bending the entire tip portion of one spring piece portion to the other spring piece portion side. Since the hooking piece is in a state where the tip of the other spring piece is hooked from the outside, the hooking piece formed on one spring piece is the tip of the other spring piece. Is not engaged or locked to, but simply hooks, so the hooking piece is free to move the tip of the other spring piece, and the sun visor body is rotated. As a result, when the spring is pushed and expanded by the shaft, and when trying to return to the original state from this state, stress concentrates on the hooking piece of one spring piece and the tip of the other spring piece. Without any cracks in the hook piece In the operation durability test of the sun visor body in the process, it is possible to prevent cracks in both spring pieces, especially the hook pieces, and there are no defective products in the manufacturing process, resulting in a reduction in product cost. Can be planned.

  Next, a first embodiment according to the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a vehicle sun visor employing a first embodiment of the present invention, FIG. 2 is a front view of the vehicle sun visor shown in FIG. FIG. 4 is an exploded view depicting the inside of the chain line garden, FIG. 4 is an exploded perspective view of the shaft attached to the bracket in FIG. 1 and the support attached to the spring, and FIG. 5 is attached to the shaft and spring of FIG. FIG. 6 is a cross-sectional view taken along the line AA in FIG. 5, FIG. 7 is a cross-sectional view taken along the line BB in FIG. 5, and FIG. 8 is a cross-sectional view taken along the axis of the shaft. FIG. 9 is a perspective view in which the spring of FIG. 2 is drawn on the front shoulder.

  In the figure, a vehicle sun visor includes a sun visor main body 1 formed in a rectangular plate shape and a vehicle body (not shown) so as to shield the irradiation light that is trapped in front or side of the driver's seat or front passenger seat of the vehicle. A shaft 2 having a substantially circular cross section and being bent in a substantially L shape, which is rotatably mounted, a support 3 which is rotatably supported by the shaft 2 and to which the sun visor body 1 is attached, and one end of the shaft 2 The spring main body 4a straddling and the spring 4 having a bifurcated spring piece 4b, 4c that is connected to the spring main body 4a and is mounted on the spring mounting 3c provided on the support 3 are configured. Yes.

  The sun visor body 1 is configured by encapsulating a sun visor skin such as a woven fabric, a non-woven fabric, or a PVC sheet on the outer surface of a resin core made of a molded product such as an injection molded product or a bead foam molded product.

  Although not shown, the resin core material may be configured such that a space portion is formed inside by joining a pair of divided sun visor bodies formed in a shell shape.

  The support 3 is composed of a resin molded body obtained by molding a synthetic resin such as PP by injection molding or the like, and a pair of bearing portions 3a through which the shaft 2 is inserted is formed. Both the bearing portions 3a are connected by a connecting portion 3b. In addition, a thin spring mounting portion 3c is integrally formed with the connecting portion 3b for mounting the spring 4.

  A pair of planar chamfered portions 2a are formed on the outer peripheral portion of the shaft 2 so as to be separated from each other in the axial direction of the shaft 2 at a position between the pair of bearing portions 3a.

  The spring 4 is formed by pressing a steel plate or the like. The spring 4 includes a spring main body portion 4a bent in a substantially elliptical cross section at the head, and the chamfered portion 2a is provided on one surface 4a-1 side of the spring main body portion 4a. A pair of flat surfaces 4d are formed so as to face each other.

  Further, on the other surface 4a-2 side facing the one surface 4a-1 side of the spring main body 4a, the arc-shaped outer periphery of the shaft 2 at a position facing the both flat surfaces 4d on the opposite side of the shaft 2 in the radial direction. A concavely curved contact portion 5 is formed along the surface 2b.

  Then, both flat surfaces 4d formed on the one surface 4a-1 side of the spring main body 4a are opposed to the respective chamfered portions 2a of the shaft 2, and the concavely curved contact portion 5 formed on the other surface 4a-1 side is connected to the shaft 2. The spring body 4a clamps the outer periphery of the shaft 2 in a state where the shaft 2 is elastically contacted with the arcuate outer surface 2b on the opposite side in the radial direction with respect to the double-sided chamfered portion 2a of the sun visor main body 1. It is held in the retracted state (normally attached close to the ceiling of the vehicle).

  Further, of the two spring piece portions 4b and 4c of the spring 4, the tip end portion of one spring piece portion 4b is bent in the direction of the shaft 2 (upward in FIG. 6), thereby hooking piece portion 4b-1. And the hooking piece 4b-1 is hooked so as to wind the tip 4c-1 of the other spring piece 4c in a straight shape so as to be wound from the outside. It attaches to the attachment part 3c.

  Although not shown, a protrusion that presses the spring mounting portion 3c is formed at the center of both the spring piece portions 4b and 4c, and the side surface of the spring mounting portion 3c is pressed by the protrusion. May be.

  In addition, the pair of chamfered portions 2a formed on the shaft 2 is configured so as to face a mounting surface (for example, a ceiling surface) of the vehicle when the sun visor main body 1 is stored, but is not limited thereto. It may be made to face the compartment side of a vehicle without it.

  In the embodiment of the present invention configured as described above, the mounting structure of the spring 4 to the spring mounting portion 3c is formed by bending the entire tip of one spring piece portion 4b toward the other spring piece portion 4c. Since the hook piece 4b-1 is formed and the hook piece 4b-1 is in a state of being hooked from the outer side of the tip 4c-1 which is the straight shape of the other spring piece 4c, one spring The hooking piece 4b-1 formed on the piece 4b is not engaged or locked with the tip 4c-1 of the other spring piece 4c, and is merely hooked. The hook piece 4b-1 is not engaged with the other spring piece 4c, and the hook piece 4b-1 makes the movement of the tip of the other spring piece 4c free. Thus, the spring 4 is moved by the shaft 2 by rotating the sun visor body 1. When it is expanded or when it is about to return from this state, stress is applied to the hooking piece 4b-1 of one spring piece 4b and the tip 4c-1 of the other spring piece 4c. In the operation durability test of the sun visor body 1 in the manufacturing process, both spring pieces 4b, 4c, especially the hook pieces 4b- 1 can be prevented from being cracked, so that it is not a defective product in the manufacturing process, and as a result, the product cost can be reduced.

  According to the present embodiment, the two flat surfaces 4d of the spring main body 4a come into contact with the chamfered portions 2a of the shaft 2, and the concave curved contact portion 5 comes into contact with the arcuate outer peripheral surface 2b of the shaft 2. Accordingly, the shaft 2 and the support 3 are positioned so as to maintain the retracted state of the sun visor body 1.

  Further, when the sun visor main body 1 is changed from the retracted state to the use state, the sun visor main body 1 is rotated with respect to the shaft 2. The corner portion of the chamfered portion 2a of the shaft 2 abuts on the flat surface 4d of 4a to push and expand the flat surface 4d, and the rotation angle of the sun visor body 1 is appropriately maintained by the spring force of the spring 4, so that the sun visor body 1 is occupant Will be held at the desired angle.

  At this time, the concave curved contact portion 5 provided on the other surface 4 a-2 side of the spring main body 4 a is always in contact with the arcuate outer peripheral surface 2 b of the shaft 2, and the shaft 2 due to the spring force of the spring 4. Increase the pinching force.

  In this regard, according to the above conventional technique, as shown in FIG. 17, when the sun visor body is held in use, the flat surfaces g-1 and g-2 of the spring g are formed on the two sides of the shaft a. It will be apart from the surface width a-1 and will face the arc-shaped outer peripheral surface of the shaft a.

  According to the first embodiment of the present invention, unlike the prior art, the spring 4 generates a sufficient torque with respect to the shaft 2 at the use position of the sun visor main body 1 to It is possible to provide a product that can be held at a desired position, can withstand a continuous operation durability test in the manufacturing process, and reduce the product cost.

  Next, a second embodiment according to the present invention will be described with reference to FIGS. About the same structure as the said 1st Example, detailed description is omitted by attaching | subjecting a code | symbol in a figure.

  In the second embodiment according to the present invention, first, the slit 4f is provided along the inner side of the pair of flat surfaces 4d formed on the one surface 4a-1 side of the spring body 4a of the spring 4, respectively. The slit 4f extends to the other spring piece portion 4c, and the ends of the slits 4f are connected to each other by the slit 4f in the other spring piece portion 4c. The main body part 4a extends to a position that substantially reaches the concavely curved contact part 5 on the other surface 4a-2 side.

  Further, a cut-and-raised piece 4g having a lower end coupled to the one spring piece 4b is formed at a substantially central portion of the one spring piece 4b of the spring 4.

  The substantially center of the tip of the hooking piece 4b-1 in one spring piece 4b of the spring 4 is bent outward and formed in the stopper piece 4i.

  On the other hand, the connecting portion 3b of the support 3 is divided into one connecting portion piece 3b-1 and the other connecting portion piece 3b-2 which are separated from each other.

  A through-groove-shaped spring mounting portion 3c is formed between both the connecting portion pieces 3b-1 and 3b-2 so that one spring piece portion 4b and the other spring piece portion 4c are inserted and mounted together. .

  In addition, a stepped surface 3b-1a facing downward is formed on one connecting portion piece 3b-1 of the support 3 so that the tip of the cut and raised piece 4g is engaged.

  A concave portion 3b-2a is formed in a substantially central portion of the upper surface of the other connecting portion piece 3b-2 of the support 3, and the stopper piece portion is in a state where both the spring piece portions 4b and 4c are fitted to the spring mounting portion 3c. 4i is configured to be hooked on an engagement surface 3d which is the upper wall in the drawing of the other connecting piece 3b-2.

  In the second embodiment configured as described above, the spring 4 generates a sufficient torque with respect to the shaft 2 at the use position of the sun visor body 1 in the same manner as in the first embodiment, so that the occupant's It is possible to provide a product that can be held in a preferred position and can withstand a continuous operation durability test in the manufacturing process, reduce the product cost, and attach the spring 4 to the spring mounting portion 3c. The structure is such that the entire tip of one spring piece 4b is bent toward the other spring piece 4c to form a hook piece 4b-1, and the hook piece 4b-1 is the other spring piece. Since the front end 4c-1 that is in a straight shape of 4c is merely hooked from the outside, the hook piece 4b-1 is not engaged with the other spring piece 4c, and is free. Since it is in a state, Sunbai When the main body 1 is rotated and the spring 4 is pushed and expanded on the shaft 2 or when returning from the expanded state, the one spring piece 4b (the hook piece 4b-1) Can be moved with respect to the spring piece 4c, and stress is not concentrated on the hook piece 4b-1 and the tip 4c-1 of the other spring piece 4c, and the hook piece 4b-1 is not cracked. It is possible to prevent the occurrence of cracks in the spring pieces 4b and 4c, particularly the hook pieces 4b-1 of the spring 4 in the operation durability test of the sun visor main body 1 during the production process. As a result, the product cost can be reduced.

  Further, in the second embodiment, when the sun visor main body 1 is rotated with respect to the shaft 2 and the spring 4 is pushed and expanded, or when the spring 4 tries to return to the original state, the spring main body 4a is stressed. However, since the slits 4f are formed along the inner sides of the pair of flat surfaces 4d of the spring main body 4a, the stress can be dispersed by the slits 4f. As a result, the spring 4 (especially each flat surface 4d) can be prevented from cracking.

  The abutting state of the portion surrounded by the slit 4f in the spring 4 and the shaft 2 and the abutting state of the pair of flat surfaces 4d of the spring 4 and the pair of chamfered portions 2a on the shaft 2 side can be adjusted separately. Thus, the initial torque when the sun visor body 1 is pulled out from the storage position to be used can be adjusted separately from the intermediate torque when the sun visor body 1 is rotated from the storage position during use.

  For example, by strongly interfering with the shaft 2 at the portion surrounded by the slit 4f in the spring 4, only the intermediate torque can be increased without affecting the initial torque, and the sun visor body 1 can be brought into the position desired by the occupant. It can be held securely.

  Further, when one spring piece portion 4b and the other spring piece portion 4c of the spring 4 are inserted into the spring mounting portion 3c, the stopper piece portion 4i formed at the tip of the one spring piece portion 4b becomes the other connecting piece 3b. -2 is in contact with and engaged with the engaging surface 3d, the amount of insertion of the spring piece 4b and the other spring piece 4c of the spring 4 into the spring mounting portion 3c is restricted. The spring piece portion 4b and the other spring piece portion 4c are sandwiched between the connecting piece pieces 3b-1 and 3b-2.

  Furthermore, when both the spring piece portions 4b and 4c of the spring 4 are inserted into the spring mounting portion 3c, the cut and raised piece 4g formed on one spring piece portion 4b of the spring 4 is one connecting piece portion of the support 3. By engaging with the stepped surface 3b-1a formed on 3b-1, and once assembled, the spring 4 can be prevented from coming out of the support 3.

  In the second embodiment, the slits 4f are formed so as to be close to the inner sides of the pair of flat surfaces 4d formed on the one surface 4a-1 side of the spring body 4a of the spring 4, respectively. In addition, the spring body 4a is extended to a position that substantially reaches the concavely curved contact portion 5 on the other surface 4a-2 side of the spring body portion 4a, but is not limited thereto, and the other surface of the spring body portion 4a is not limited thereto. It does not need to be extended to the 4a-2 side.

  The vehicle sun visor structure according to the present invention may be applied to a sliding sun visor configured such that the shading range can be changed by sliding the sun visor body 1 with respect to the shaft 2.

  As described above, in the present invention, the mounting structure of the spring to the spring mounting portion is formed by hooking the entire tip portion of one spring piece portion to the other spring piece portion side to form a hook piece portion, Since the hook piece is configured to hook the tip of the other spring piece from the outside, the hook piece formed on one spring piece is the tip of the other spring piece. It is not engaged or locked to the part, it is just hooked, so the hooking piece part is free to move the tip of the other spring piece part, and the sun visor body is rotated As a result, when the spring is pushed and expanded by the shaft, and when trying to return from this state, stress concentrates on the hook piece of one spring piece and the tip of the other spring piece. Without cracking, and the hook piece will crack In addition, it is possible to prevent cracks in the spring pieces, particularly the hook pieces, in the operation durability test of the sun visor body during the manufacturing process, and there is no defective process in the manufacturing process, resulting in a product cost. Therefore, it is suitable for a sun visor structure for a vehicle and the like that shields irradiation light such as sunlight or headlight light of an oncoming vehicle that is obscured from the front or side of the driver's or passenger's seat of the vehicle. You can say that.

1 is a perspective view of a vehicle sun visor employing a first embodiment according to the present invention. FIG. 2 is a front view in which a part of the vehicle sun visor in FIG. 1 is broken and drawn. FIG. 3 is an enlarged view in which the inside of a one-dot chain line circle in FIG. 2 is drawn. It is the perspective view which decomposed | disassembled and depicted the shaft with which the bracket in FIG. 1 was mounted | worn, and the support with which the spring was mounted | worn. It is sectional drawing drawn by cut | disconnecting the shaft of FIG. 1, and the support with which the spring was mounted | worn along the axis line of a shaft. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is the perspective view which drawn the spring of FIG. 2 from the back diagonally. It is the perspective view which drawn the spring of FIG. 2 from the front side diagonally. It is the perspective view which divided | segmented the spring and support member in 2nd Example based on this invention, and was drawn from the front side. Similarly, it is the perspective view which divided and divided the spring and the support member from the back side. Similarly, it is a sectional view drawn by assembling a spring and a support member, mounting a shaft, and cutting along a direction intersecting the axis of the shaft. It is the perspective view which decomposed | disassembled and drawn the shaft with which the bracket of the conventional sun visor for vehicles, and the support with which the spring was mounted | worn. Similarly, it is a cross-sectional view depicting the retracted state of the sun visor body by cutting the shaft and the support on which the spring is mounted along the axis of the shaft. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. 14 at the time of storage of a sun visor main body. It is CC sectional drawing of FIG. 14 in the use condition of a sun visor main body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sun visor main body 2 Shaft 2b Arc-shaped outer peripheral surface 3 Support 3c Spring mounting part 4 Spring 4a Spring main body part 4b One spring piece part 4b-1 Hooking piece part 4c The other spring piece part 4c-1 Tip part

Claims (1)

A shaft that is rotatably mounted on the vehicle body, a support that is rotatably supported by the shaft and to which a sun visor body is attached, a spring body portion straddling the shaft, and a connection formed to the spring body portion, and the support And a spring having a pair of spring pieces formed in a bifurcated shape, and the two spring body portions sandwich the shaft so that the storage state of the sun visor body is maintained. A sun visor structure for a vehicle configured to be held, wherein the entire tip of one of the pair of spring pieces is bent toward the other spring piece to form a hook piece. , in a state where the the cited hooking piece hooked from the outside of the distal end portion of the other spring piece portion, and mounting the spring in the spring mounting portion, further, the spring body portion, said sheet A pair of slits are formed so as to be close to the inner side of the flat surface formed so as to face the chamfered portion of the shaft, and both ends of the slits are connected to each other at the other spring piece portion. The one spring piece portion has a stopper piece portion bent outward, and the stopper piece portion is in a state in which the two spring piece portions are fitted to the spring mounting portion. The vehicle sun visor structure according to claim 1, wherein the vehicle sun visor structure is configured to be in contact with the upper surface of the connecting piece in the support .