JP4394403B2 - Rotation opening and closing mechanism of the vanity mirror lid provided in the sun visor of an automobile - Google Patents

Description

  The present invention holds a lid of a vanity mirror provided in a sun visor of an automobile so that it can be rotated between a closed position that covers the vanity mirror and an open position that opens the surface of the vanity mirror, and is in the closed position and the open position. The present invention relates to a pivot opening / closing mechanism of a vanity mirror lid that is supported so as to be able to.

  2. Description of the Related Art Conventionally, it has been known that a sun visor for shielding light is provided in a passenger compartment for anti-glare of an automobile occupant, particularly a driver. The sun visor is supported on the front upper part of the passenger compartment so that it can be placed in various use positions and non-use positions.

  In addition, since the sun visor is disposed near the passenger's head in the passenger compartment of the automobile, the sun visor is often configured to provide convenience for the passenger by providing various accessories. There are many examples with mirrors.

  The vanity mirror is provided on the side facing the occupant when the sun visor is arranged to face the occupant. Some vanity mirrors of this type are provided with an openable / closable lid so that the passenger can use the vanity mirror by opening the lid only when necessary. Such a configuration can avoid the troublesome exposure of the vanity mirror when not in use, which is preferable.

  There are two types of lids for this type of vanity mirror: a slide type lid and a rotary type lid.

  In the slide type, that is, the lid can be moved horizontally or vertically in parallel to the mirror surface of the vanity mirror. In this case, the lid slides along the slide rail provided around the vanity mirror. Supported as possible. On the other hand, the rotation type is provided with a rotation axis in the vicinity of the edge of the lid, and the lid can be rotated around the rotation axis to cover or open the mirror surface of the vanity mirror. . Since the rotary lid does not need to be provided with a slide rail, there is an advantage that a surface area required for installation is small.

  In any case, for the convenience of the lid of the vanity mirror, the lid is opened (the vanity mirror mirror surface is exposed) and closed (the lid covers the mirror surface) even if the occupant releases the hand for the sake of convenience. A configuration capable of maintaining the state). Particularly in the case of a rotating lid, a special structure is often required for this purpose.

  The structure of the vanity mirror that maintains the open position and the closed position in this manner is disclosed in, for example, Patent Document 1. As shown in FIG. 6, a lid, that is, a cover 72 is attached to one end edge of the mirror body 71 so that the vanity mirror can be opened and closed by rotating around a rotation shaft 75. A mounting ear piece 74 having a flat portion on the peripheral surface is formed on the rotating shaft 75, and a resilient member 37 in a shape of a leaf spring bent in a V shape is in contact with the peripheral surface. It is arrange | positioned in the space for attachment formed in. The cover 72 is held in the closed position when one flat surface portion of the peripheral surface of the mounting ear piece 74 abuts against the elastic member 73. When the cover 72 is opened, the elastic member 73 is elastically deformed by the mounting ear piece 74. Then, when the cover 72 is rotated to a predetermined open position, the other flat portion of the peripheral surface of the mounting ear piece 74 is held at that position by contacting the elastic member 73.

Another conventional example is disclosed in Patent Document 2. As shown in FIG. 7, the vanity mirror includes a synthetic resin main body 81 to which the mirror is attached, a lid formed of a synthetic resin similar to the main body, that is, a cover portion 82 around the rotation shaft 85. It is attached so that it can be rotated and opened. The cover portion 82 is provided with a cam portion 84 that is provided around the rotation shaft 85 and has a flat portion on the peripheral surface. The main body portion 81 has an elastically deformable contact piece that contacts the cam portion 84. 83 is formed. The cover portion 82 is held in the closed position when one flat portion of the peripheral surface of the cam portion 84 abuts against the abutment piece 83. When opening the cover portion 82, the contact piece 83 is elastically deformed by the cam portion 84. Then, when the cover portion 82 is rotated to a predetermined open position, the other flat portion of the peripheral surface of the cam portion 84 abuts against the abutment piece 83 to be held at that position.
Japanese Patent Laid-Open No. 2-102840 Japanese Utility Model Publication No. 6-50924 JP-A-3-213422 Japanese Utility Model Publication No. 54-179005 Japanese Utility Model Publication No. 56-144378

  In the configuration disclosed in Patent Document 1 described above, since the elastic member 73 is used, the number of parts is increased, and a process for attaching the elastic member 73 is required, which increases the number of steps. There are disadvantages.

  On the other hand, in the configuration disclosed in Patent Document 2, the configuration is simplified (reduction in the number of parts and the number of manufacturing steps) compared to the configuration disclosed in Patent Document 1, but there are practical durability issues. is there. That is, when the opening / closing operation is performed, the contact piece 83 is elastically deformed each time. This elastic deformation causes the cover portion 82 to be in the closed position or the open position by the elastic force against the local elastic displacement of the contact piece 83. Since a large force that can be firmly held is generated, the deformation tends to be a large deformation near the elastic limit of the (resin) material constituting the contact piece 83. It is known that the material easily fatigues when repeatedly subjected to bending deformation close to the elastic limit. For this reason, the contact piece 83 causes a deviation (deformation, distortion) from the initial shape relatively early as the cover portion 82 is repeatedly opened and closed, and the cover portion 82 is firmly held in the closed position or the open position. You will not be able to.

  Such a problem of fatigue of a member that generates an elastic force may also occur in the configuration of Patent Document 1. That is, in the configuration of Patent Document 1 as well, the force that holds the cover 72 firmly in the closed position or the open position is obtained by the elastic force against local deformation of the elastic member 73. It is difficult to avoid material fatigue (metal fatigue) of the elastic member 73 due to repeated large deformation.

  The present invention has been made in view of the problems in the prior art as described above, and an object of the present invention is to have a simple configuration, and even if the lid of the vanity mirror is opened and closed many times, it is stable. An object of the present invention is to provide a rotation opening / closing mechanism that can be held in an open position and a closed position.

  In order to achieve the above-mentioned object, the rotation opening / closing mechanism of the lid of the vanity mirror of the present invention attached to the sun visor of the automobile has a closed position that covers the vanity mirror and an open position that exposes the vanity mirror. A vanity mirror lid opening / closing mechanism that can be supported between the closed position and the open position by generating a certain resistance against the rotation from the closed position or the open position. The pivot axis of the lid is supported by at least one of two members partially connected to each other, and the lid pivots from the open position to the closed position or from the closed position to the open position. Sometimes, the lid partially presses one of the members, and elastic deformation occurs in the entire portion between the connecting portion of the member with the other member and the portion pressed by the lid. To do.

  That is, in this configuration, when the lid is rotated, a portion pressed by a part of the lid is configured to be easily elastically deformed between the pressing portion by the lid and the connecting portion of the other member, that is, For example, it is made thin enough, and this whole part is used as an elastic member for generating a force for holding the lid in the open position or the closed position. Therefore, according to this configuration, unlike the conventional technique, the holding force is obtained by the sum of the elastic forces against the deformation at each point in a wide area, unlike the case where the holding force is obtained by the elastic force against the local deformation of the elastic member. Therefore, sufficient holding force can be obtained while suppressing deformation. Further, in this configuration, the holding force of the lid is obtained by utilizing the elastic force against the deformation of the member that supports the lid, and it is not necessary to prepare a separate elastic member, so that the configuration can be simplified. .

  Specifically, when the lid is rotated from the closed position or the open position, the lid partially abuts on one of the members to elastically deform the member. Specifically, the lid is in the closed position. A plane portion parallel to the pivot axis of the lid, sometimes in surface contact with a portion of the member, and a plane portion parallel to the pivot axis of the lid, in plane contact with a portion of the member when in the open position; What is necessary is just to set it as the structure which provided between the both plane parts and the curved surface part from which the distance from the rotation axis line of a lid became a long diameter compared with both plane parts. That is, in this configuration, when the lid is rotated from the closed position or the open position, the curved surface portion abuts on the member, and the curved surface portion has a longer distance from the rotation axis of the lid than the flat surface portion. Therefore, when the curved surface portion abuts, the portion of the member where the curved surface portion abuts is pressed by the curved surface portion and displaced in a direction away from the rotation axis of the lid, thereby the member. Is elastically deformed.

  Such a plane part and a curved surface part can be easily formed without requiring a special process, for example, by forming a lid by resin molding using an appropriate mold. Further, in this configuration, the lid can be stably held in the closed position and the open position, so that the lid can be stably held in contact with the member. On the other hand, in the intermediate position, the curved surface is linear with the member. Therefore, the lid can be smoothly rotated with almost no resistance.

  In one embodiment, the flat surface portion can be formed by chamfering a part of the cylindrical rotation shaft of the lid. In this case, the cylindrical surface between the two chamfered portions formed becomes a curved surface portion that presses the member and elastically deforms it.

  Moreover, in order that a lid may press the said member partially, it is advantageous to provide the said member with a convex part. Such a convex portion can be easily formed without requiring a special process, for example, by forming the member by resin molding using an appropriate mold.

  Specifically, the rotation opening and closing mechanism of the present invention includes a flat belt-like outer peripheral portion extending in a shape along the planar outer shape of the sun visor, and a flat belt-like member stretched in a plane surrounded by the outer peripheral portion. And a frame including a mirror support plate connected to the inner core portion and supporting the vanity mirror, and a frame partially connected to the frame and mounted on the mirror support plate with the vanity mirror interposed therebetween. It can be suitably used for a sun visor having a configuration including a mirror casing. In this case, the members connected to each other can be a frame and a mirror casing, and a part of the lid can press the frame when the lid is rotated. Therefore, the rotation opening / closing mechanism of the present invention can be configured without using a special new member as the above-described member.

  Alternatively, the rotation opening / closing mechanism of the present invention is a sun visor having a hollow plate-like frame formed by folding two plate-like half cores having the same planar outer shape and joined at the outer peripheral portion. Can also be suitably used. In this case, the above-mentioned members connected to each other can be the same member as the above-described mirror casing attached to one half core and the half core or the other half core, or both half cores. In any case, a part of the lid can press one half core when the lid is rotated. Therefore, also in this case, the rotation opening / closing mechanism of the present invention can be configured without using any special new member as the above-described member.

  According to the present invention, the lid is opened or closed by using not the elastic force against local deformation of the member but the total force of the elastic force against deformation at each point in a relatively wide area of the member. By obtaining the holding force, it is possible to obtain a sufficient holding force while suppressing the deformation generated in the member to be small. Accordingly, the lid opening / closing mechanism of the vanity mirror lid according to the present invention is less susceptible to material fatigue and has high resistance to multiple opening / closing operations. Further, the rotation opening and closing mechanism of the present invention uses a member that supports the lid as a member that generates an elastic force, and it is not necessary to use an elastic member in particular, so that the number of parts does not increase. A simple configuration can be obtained.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view of a vanity mirror 30 portion of an automobile sun visor provided with a rotation opening / closing mechanism of the present embodiment. As shown in the figure, the vanity mirror 30 is attached to a predetermined position of the frame 40, and the mirror casing 20 and the lid 10 are attached to this portion. The frame 40, the mirror casing 20, and the lid 10 are all suitably formed by molding a thermoplastic resin (polyamide, polypropylene, polyacetal, etc.).

  The frame 40 serves as a skeleton of the sun visor, and has a belt-like outer peripheral portion 41 extending substantially along the outer shape of the sun visor and an inner core portion formed of a belt-like member stretched in a plane surrounded by the outer peripheral portion 41. 42. The inner core portion 42 is slightly thinner than the outer peripheral portion 41 and is non-uniformly arranged so as to optimally reinforce the outer peripheral portion 41 while reducing the increase in weight using the calculation result of the strength analysis. .

  The upper edge portion of the outer peripheral portion 41 supports a rotation bearing portion 47 for supporting a rotation shaft used for attaching the sun visor to the automobile, and an engagement tool locked to the locking portion of the automobile. The engaging tool support portion 46 is integrally formed. Accordingly, the sun visor for an automobile is mounted in the automobile so that the sun visor can be positioned in various use positions and non-use positions by rotating in the vertical direction and the horizontal direction. In FIG. 1, the engagement tool support portion 46 is shown only on one side, but another block-shaped member as shown in the figure is provided at an opposing position, and a rod-shaped engagement tool is provided therebetween. Is supported.

  A mirror support plate 43 for supporting the vanity mirror 30 is connected to the inner core portion 42 at a predetermined position in the inner region of the outer peripheral portion 41. A plurality of elastic claws 44 are provided on the peripheral edge of the mirror support plate 43, and the vanity mirror 30 is supported on the surface of the mirror support plate 43 by being pressed by the elastic claws 44.

  In addition, an engagement hole 45 is formed at the periphery of the mirror support plate 43 to engage the engagement claw 21 provided near the periphery of the rear surface of the mirror casing 20. The mirror casing 20 is attached to the frame 40 from above the vanity mirror 30 by locking the engaging claw 21 in the engaging hole 45. The mirror casing 20 is formed with an opening 25 exposing the vanity mirror 30 at the center, and the periphery of the opening 25 is arranged so as to border the periphery of the vanity mirror 30.

  The lid 10 has a flat plate-like portion that covers the opening 25 of the mirror casing 20, and rotating shaft protrusions 11 that protrude in the left-right direction from the plate-like portion are formed at both ends of the upper edge of the plate-like portion. Has been. A slit 22 for inserting the lid 10 from the frame 40 side is formed in the vicinity of the upper edge of the mirror casing 20, and shaft support grooves 23 that open toward the frame 40 side are formed at both ends thereof. Yes. The lid 10 has a plate-like portion inserted through the slit 22, and the rotation shaft projection 11 is surrounded by the tip surface of the convex portion 48 formed integrally with the shaft support groove 23 and the frame 40, so that the shaft can rotate freely. It is supported.

  The cross-sectional shape of the rotation shaft projection 11 is a shape close to a circle having no sharp corners and a diameter slightly smaller than the width of the shaft support groove 23 so that it can be easily rotated. In the example, four chamfered portions are formed. The chamfered portion has a shorter diameter than the other portions, and therefore, a portion between the chamfered portions has a longer diameter than the chamfered portion. These chamfered portions are formed at positions where the lid 10 is rotated to be in parallel with the front end surface of the convex portion 48 when the lid 10 is in the closed position, and the convex portion 48 when the lid 10 is in the open position. A second chamfered portion 11b formed at a position in contact with the front end surface of the first chamfer is included. In the example shown in FIG. 2, the narrow angle between the first chamfered portion 11a and the second chamfered portion 11b is about 90 °, and further, one at each of the positions facing these chamfered portions. Four chamfered portions are formed. Due to the mutual interference between the chamfered portion of the rotating shaft projection 11 and the tip end surface of the convex portion 48, a force for stably holding the lid 10 in the closed position and the open position is generated as described later. The opening angle between the closed position and the open position of the lid 10 is not limited to 90 °. Therefore, the cross-sectional shape of the rotating shaft protrusion 11 is not limited to that shown in FIG. Depending on the case, the shape can be made suitable.

  Further, two stoppers 12 projecting upward from the plate-like portion are formed on the upper edge of the plate-like portion of the lid 10, and the rotation amount (opening degree) of the lid 10 is formed by the stopper 12. Be regulated. The mirror casing 20 is formed with a stopper receiving groove 24 into which the stopper 12 is inserted when the lid 10 is closed.

  The frame 40 is finally mostly except for the engagement tool support portion 46, the rotary bearing portion 47, and the mirror support plate 43 by a pad material 50 made of a material that produces a buffer effect such as a resin foam. Further, the outer periphery of the pad material 50 is covered with a skin material 51 that functions to enhance designability (see FIG. 2 and the like).

  Next, the rotation operation of the lid 10 in the sun visor of the present embodiment will be described with reference to FIGS. 2 corresponds to a cross-sectional view taken along the line AA in FIG. 1 in the assembled sun visor. FIG. 2A shows a state where the lid 10 is in the closed position, and FIG. FIG. 2C shows a state in which the lid 10 is in the open position, and FIG. 2C shows a state in which the lid 10 is in an intermediate position between the closed position and the open position. FIG. 3 corresponds to a cross-sectional view taken along the line BB of FIG. 1 in the assembled sun visor.

  As shown in FIG. 2A, in the state where the lid 10 is in the closed position, the first chamfered portion 11 a of the rotation shaft protrusion 11 is positioned in parallel to the tip surface of the convex portion 48. The distance between the upper end surface of the shaft support groove 23 of the mirror casing 20 and the tip surface of the convex portion 48 is slightly shorter than the diameter of the rotating shaft projection 11 at the chamfered portion in a state where no force is applied. Yes. Therefore, in a state where the lid 10 is in the closed position, the convex portion 48 is in contact with the chamfered portion 11a of the rotation shaft protrusion 11 with a very weak force. Further, as shown in FIG. 2B, in the state where the lid 10 is in the open position, the second chamfered portion 11b of the rotating shaft projection 11 is positioned in parallel to the tip surface of the convex portion 48 and is closed. As in the case of the position, the convex portion 48 is in contact with the second chamfered portion 11 b of the rotation shaft protrusion 11 with a very weak force.

  On the other hand, in the state where the lid 10 is in the intermediate position between the closed position and the open position, as described above, the rotation shaft protrusion 11 has a larger diameter in the portion adjacent to the chamfered portion than the chamfered portion. As shown in FIG. 2C, the protrusion 48 is pushed down more than when it is in the closed position or the open position. At this time, the displacement of the convex portion 11 is mainly caused by the inner core portion 42 of the frame 40 between the engagement hole 45 and the convex portion 48 with which the mirror casing 20 is engaged, as shown by a one-dot chain line in FIG. It is caused by bending and deforming almost uniformly and gently at each point of the entire portion in between. In FIG. 3, for the sake of easy understanding, this bending deformation is described as the frame 40 being greatly bent, but it is so small that it cannot be visually confirmed. Since this degree of bending deformation can be absorbed by the flexibility of the pad material 50, the pad material 50 is not adversely affected. At this time, the mirror casing 20 may be slightly bent. In any case, due to the elastic force against the displacement of the frame 40 and the mirror casing 20, the convex portion 48 is in contact with the lid 11 with a stronger force than when it is in the open position or the closed position.

  Therefore, when the lid 10 is to be rotated from the closed position or the open position to the intermediate position between the two, the rotation shaft protrusion 11 is prevented from rotating by the elastic force against the displacement of the frame 40. For this purpose, the lid 10 is held in the closed or open position. At this time, in the closed position or the open position, the chamfered portion of the rotation shaft protrusion 11 and the tip surface of the convex portion 48 are in surface contact with each other. The rotation of the projection also causes the displacement of the convex portion 48. For this reason, the lid 10 is stably held in the closed position or the open position.

  This force for holding the lid 10 in the closed position or the open position is adjusted so that the lid 10 does not rattle due to vibrations or the like when the automobile is running, and does not become a large resistance when the user rotates. Is preferred. Such adjustment can change the difference in diameter between the chamfered portion and other portions, or the distance between the tip surface of the convex portion 48 and the upper end surface of the shaft support groove 23 when no force is applied. Can be implemented. At this time, in the state where the lid 10 is in the closed position or the open position, the force of interference between the convex portion 48 and the peripheral surface of the rotation shaft projection 11 can be made small. In addition, wear of the projections 48 can be reduced. Further, once the lid 10 is moved to an intermediate position between the closed position and the open position, the convex portion 48 and the rotating shaft projection 11 are in contact with each other only in the linear region in the axial direction. The lid 10 can be smoothly rotated to the open position or the closed position thereafter. When the lid 10 is rotated to the open position and the vicinity of the closed position, even if the user releases the hand due to the interference between the chamfered portions 11a and 11b and the front end surface of the convex portion 48, the lid 10 can be opened to a predetermined position. Rotate to position, closed position.

  In the rotation opening / closing mechanism of the lid 10 according to the present embodiment described above, the lid 10 can be held in the closed position and the open position, and does not require parts such as the elastic member in the prior art and is originally necessary. An elastic force against deformation of the frame 40 and the mirror casing 20 is used. That is, the rotation opening / closing mechanism of this embodiment has a simple configuration that does not increase the number of parts. Furthermore, the convex portion 48, the shaft support groove 23, and the rotation shaft protrusion 11 required for the rotation opening / closing mechanism can be easily formed by integrally forming the frame 40, the mirror casing 20, or the lid 10. Since there is no need for a special process for assembly, the rotation opening / closing mechanism of this embodiment is easy to manufacture without taking time and increasing manufacturing costs. Is possible.

  Further, in the configuration of the present embodiment, the force for holding the lid 10 in the open position and the closed position is larger than the local deformation as in the conventional technique, that is, the convex portion of the frame 40. The elastic force against almost uniform deformation at each point of the entire portion between 48 and the engagement hole 45, and in some cases, the entire portion of the mirror casing 20 between the shaft support groove 23 and the engagement claw 21. Is obtained by the sum of Therefore, even if this deformation is small for each point in the region where the deformation occurs, a relatively large force is generated, and therefore the lid 10 can be firmly held in the open position and the closed position while suppressing the deformation to a small extent. It can be. For this reason, in the rotation opening / closing mechanism of the present embodiment, material fatigue hardly occurs even when the opening / closing mechanism is opened and closed many times, that is, durability against repeated opening / closing of the lid 10 is high. Moreover, since the deformation | transformation which arises at the time of opening and closing is a small thing, an extra space is not required, such as providing an escape part for the time of deformation | transformation.

  In addition, said embodiment illustrates this invention and various deformation | transformation are possible within the scope of the present invention.

  For example, in the above embodiment, the configuration in which the lid 10 is held in the open position and the closed position at the position where the chamfered portions 11a and 11b of the rotation shaft protrusion 11 and the upper surface of the convex portion 48 are in surface contact with each other has been described. In some cases, in the open position and the closed position, for example, the chamfered portions 11a and 11b and the upper surface of the convex portion 48 are completely in surface contact so that a part of the lid 10 and a part of the mirror casing 20 interfere with each other. You may make it the lid 10 become an open position and a closed position just before the position to perform. In this way, the rotational force applied to the lid 10 due to the interference between the chamfered portions 11a and 11b and the upper surface of the convex portion 48 can be used as a force for holding the lid 10 in the open position and the closed position. In some cases, rattling of the lid 10 at the open position and the closed position can be more effectively suppressed.

  In the above embodiment, the chamfered portion formed on the rotation shaft projection 11 of the lid 10 and the tip surface of the convex portion 48 formed on the inner core portion 42 of the frame 40 at a position in contact with the rotation shaft projection 11. As a modification, as shown in FIG. 4, the chamfered portion in the above-described embodiment is provided at the end of the stopper 12. It is good also as a structure which provided the flat part which performs the function of this, and formed convex part 48 'in the position contact | abutted to the outer peripheral surface of the edge part of the stopper 12. FIG. That is, the stopper 12 is provided between the first flat surface portion 12a and the first flat surface portion 12a, which is in surface contact with the tip surface of the convex portion 48 'when the lid 10 is in the closed position shown in FIG. A second flat surface portion 12b formed at a position where the narrow angle is about 90 ° is formed, and a smooth curved surface portion is formed between the first flat surface portion 12a and the second flat surface portion 12b. . Although not clearly shown in FIG. 4, the distance from the rotation axis of the lid 10 is longer on the curved surface portion between the first and second flat surface portions 12a and 12b. Yes.

  By such interference between the outer peripheral surface of the stopper 12 and the tip surface of the convex portion 48 ′, a force for holding the lid 10 at a predetermined open position and a closed position can be generated as in the above embodiment. it can. At this time, the rotation shaft of the lid 10 can have a simple circular cross-sectional shape. Also in this modification, the displacement of the convex portion 48 ′ is caused by a relatively wide portion of the inner core portion 42 of the frame 40 between the convex portion 48 and the engagement hole 45 that locks the mirror casing 20. Due to the deformation, the deformation is small for each point in the region where the deformation occurs, so that a sufficient holding force of the lid can be obtained, and therefore the durability against repeated opening and closing of the lid is increased. be able to.

  In the above embodiment, the example in which the rotation mechanism of the present invention is provided in the sun visor formed by covering the frame 40 with the pad material 50 and the skin material 51 is shown, but as shown in FIG. The present invention can also be applied to a sun visor in which plate-like hollow frames are formed by joining the outer peripheral portions of plate-like half cores 60 and 61 having substantially the same outer shape. That is, in this case, the mirror support plate portion 63 to which the same parts (not shown) as the vanity mirror 30, the mirror casing 20, and the lid 10 in the above embodiment are attached is formed on the inner surface of one plate-like half core 61. Yes. An elastic claw 64 that supports the vanity mirror and an engagement hole 65 that locks the mirror casing are formed on the outer periphery of the mirror support plate 63. And the convex part 68 is formed in the plate-shaped half core 61 in the position contact | abutted to the outer peripheral surface of the rotation axis | shaft protrusion of a lid. The other plate-shaped half core 60 has an opening 69 through which the mirror casing 20 is exposed.

  Also in this example, a force for holding the lid in the predetermined closed position and the open position can be generated by the interference between the peripheral surface of the rotation shaft protrusion of the lid and the tip surface of the convex portion 68. At this time, the displacement of the convex portion 68 is caused by the elastic deformation of the entire portion between the engagement hole 65 of the plate-shaped half core 61 and the convex portion 68, and the deformation is small enough to be small for each point, but sufficiently Therefore, it is possible to obtain a high lid holding force, and it is possible to increase the durability against repeated opening and closing of the lid. Further, if the mirror casing is attached to the plate-shaped half core 60 on the opposite side of the formation of the convex portion 68 or is formed integrally with the plate-shaped half core 60, almost the entire plate-shaped half cores 60, 61 are formed. The elastic deformation can be used to generate a force for holding the lid 10 in a predetermined closed position or an open position, and the deformation at each point can be further suppressed while maintaining the holding force.

It is a disassembled perspective view of the vanity mirror part of the sun visor for motor vehicles provided with the rotation opening / closing mechanism of embodiment of this invention. 2 is a cross-sectional view of the automobile sun visor of FIG. 1 taken along the line AA of FIG. 1, FIG. 2 (a) is a state where the lid is in a predetermined closed position, and FIG. FIG. 2C shows a state where the lid is at a predetermined open position, and FIG. 2C shows a state where the lid is at an intermediate position between the closed position and the open position. FIG. 3 is a cross-sectional view of the automobile sun visor of FIG. 1 that has been assembled, taken along line BB of FIG. 1. It is sectional drawing of the sun visor for motor vehicles of the modification of this invention. It is a top view of the open state of the sun visor for vehicles of other modifications of the present invention. It is sectional drawing of the vanity mirror part of the sun visor for motor vehicles of a prior art example. It is a side view of the vanity mirror part of the sun visor for vehicles of other conventional examples.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lid 11 Rotating shaft protrusion 11a 1st chamfer 11b 2nd chamfer 12 Stopper 12a 1st plane part 12b 2nd plane part 20 Mirror casing 21 Engagement claw 22 Slit 23 Shaft support groove 24 Stopper receiving groove 25 Opening 30 Vanity mirror 40 Frame 41 Outer peripheral part 42 Inner core part 43 Mirror support plate 44 Elastic claw 45 Engagement hole 46 Engagement tool support part 47 Rotating bearing part 48, 48 'Convex part 50 Pad material 51 Skin material

Claims (5)

The lid of the vanity mirror provided in the sun visor of the automobile can be rotated between a closed position that covers the vanity mirror and an open position that exposes the vanity mirror, and can be rotated from the closed position or the open position. A rotation opening / closing mechanism for the lid of the vanity mirror, which generates a fixed resistance against movement and supports the closed position and the open position so as to be held;
The sun visor has a frame including a mirror support plate that supports the vanity mirror, and a mirror casing that is partially connected to the frame and is mounted on the mirror support plate with the vanity mirror interposed therebetween,
The pivot axis of the lid is surrounded by the frame and the mirror casing and is rotatably supported .
Before Symbol lid toward the closed position from the open position, or when turning toward the open position from the closed position, the lid is partially pressed at least one of said mirror casing and said frame, a portion thereof wherein the lid is pressed, the connecting portion of the frame and the mirror casing, causing elastic deformation to the entire portion between, the vanity mirror lid pivoting opening and closing mechanism.   The lid is in surface contact with a part of the member when in the closed position, and is in surface contact with a part of the member when in the open position, and a flat portion parallel to the rotation axis of the lid. A plane part parallel to the pivot axis of the lid and a curved part formed between the two plane parts, the distance from the pivot axis of the lid having a longer diameter than the two plane parts are formed. The lid opening / closing mechanism of the vanity mirror lid according to claim 1.   3. The lid opening / closing mechanism of the vanity mirror lid according to claim 2, wherein the two flat surface portions are chamfered portions formed at a part of the columnar rotation shaft of the lid. One of said mirror casing and the frame, toward the closed position the lid from the open position, or when from the closed position is rotated toward the open position, Ru is pressed against the lid convex The rotating opening / closing mechanism of the lid of a vanity mirror of any one of Claim 1 to 3 in which the part is formed. The frame includes an outer peripheral portion flat strip extending shape along the planar outer shape of the sun visor, from the outer stretched in a plane surrounded by the peripheral portion, a flat strip-shaped member connected to the mirror support plate provided in a core portion, the formed,
Before Symbol lid toward the closed position from the open position, or when turning toward the open position from the closed position, a portion of the lid presses the portion of the inner core portion of the frame, wherein Item 5. The rotating opening / closing mechanism of the lid of the vanity mirror according to any one of items 1 to 4.

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