JP2006248434A - Turn signal switch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turn signal switch device capable of attaining size reduction and improving the flexibility of design. <P>SOLUTION: A second elastic member 8 is provided at a housing in parallel to a first elastic member 7 to retain a first lever member 5 by the first elastic member 7 at a rotational neutral position and to hold a second lever member 6 at the rotational neutral position by the second elastic member 8 when an operation lever 3 is positioned at the rotational neutral position. The first elastic member 7 and the second elastic member 8 are formed out of a thin sheet-shaped flat spring having flat plate parts 7b, 8b, first contact parts 4h, 4i which are brought into contact with one surface side of both edges of each of the first elastic member 7 and the second elastic member 8 and retaining parts 4c, 4d having second contact parts 4j, 4d which are brought into contact with the other surface side facing the first contact parts are formed at the housing, and the first contact parts 4h, 4j and the second contact parts 4j, 4k are provided in parallel to each other to face each other at such a position that they become alternate along an extending direction of the first elastic member 7 and the second elastic member 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a turn signal switch device attached to a steering column of an automobile and used as a direction indicator.

  As a conventional turn signal switch device, the base end side of the operation lever is rotatably supported by a housing integrated with a steering column or the like, and the distal end side of this operation lever is either a left or right direction indicating position. Rotating to the left, the left or right turn lamp blinks. In such a turn signal switch device, a cam surface is provided on the inner surface on the housing side and the cam surface is engaged on the operation lever side in order to hold the operation lever at the three positions of the left and right direction indicating positions and the neutral position. When the handle is rotated in the direction opposite to the indicated direction with the operating lever rotated to the left or right direction indicating position, the operating lever is A canceling mechanism for automatically returning to the neutral position is attached (for example, see Patent Document 1).

Hereinafter, the structure of a conventional turn signal switch device will be described with reference to the drawings.
6 is an exploded perspective view of a conventional turn signal switch device, FIG. 7 is a bottom view of the cancel mechanism, and FIG. 8 is an operation explanatory view of the cancel mechanism.

  In the figure, the turn signal switch device includes first and second cases 101 and 102 made of synthetic resin forming a housing, an operation lever 103 rotatably supported by both cases 101 and 102, and a second case 102. Mainly from first and second lever members 104 and 105 mounted on the inner surface and a torsion coil spring 106 which elastically biases the first lever member 104 in a direction protruding from the second case 102. As will be described later, the operation lever 103 includes an operating member 107, a holder 108, a movable member 109, and the like. The first and second cases 101 and 102 are integrated using means such as a snap coupling, and are fixed to a stator member such as a column cover or a combination switch (not shown).

  The first case 101 has a V-shaped cam surface 110 formed therein, and a driving body 124 engaged with the holder 108 is urged by a spring 125 on the cam surface 110 so as to be slidable. ing. Further, a printed circuit board (not shown) is provided on the bottom surface of the first case 101, and a contact portion for lighting such as a left and right folding lamp is formed.

  In the second case 102, a guide shaft 116 and a support shaft 117 are erected on the inner surface, and the first lever member 104 rotates on the guide shaft 116 and the second lever member 105 rotates on the support shaft 117. It is provided to be movable. Moreover, the 1st lever member 104 and the 2nd lever member 105 are connected so that rotation is mutually possible. A boss 119 is provided, and a torsion coil spring 106 is inserted into the boss 119.

The first lever member 104 is provided with elongated holes 104a and 104b and a spring receiving portion 104c. The elongated hole 104a is inserted along the guide shaft 116 so as to be rotatable and slidable. Further, a contact portion 104d and a cam portion 104e are provided in the front and rear directions.
The second lever member 105 is provided with a first opening 121 and a second opening 122, and a hole 105 a that is rotatably supported by the support shaft 117. A protrusion 105 c and a connecting pin 105 d are provided at the tip, and a long hole 104 b is inserted into the connecting pin 105 d and overlapped on the first lever member 104.

  The torsion coil spring 106 has an arm portion 106c extending like a cantilever, and the arm portion 106c is engaged with the spring receiving portion 104c of the first lever member 104, and the first lever member 104 is a torsion coil. The spring 106 is elastically biased in the longitudinal direction of the long holes 104a and 104b.

  The operating member 107 is fixed to the base portion of the operation lever 103, and the holder 108 is snapped to the operating member 107. A chevron-shaped cam surface 108c is provided at the tip of the upper surface of the holder 108, and the cam portion 104e of the first lever member 104 is opposed to the cam surface 108c. In addition, a pair of support shafts 108d and 108e are projected on both upper and lower surfaces, and are fitted to the first and second cases 101 and 102.

  The movable member 109 is inserted into the opening 108g of the holder 108, is urged by a spring 125, and is supported by the holder 108 so as to be swingable. In addition, a receiving portion 109 e that reaches into the second opening 122 of the second lever member 105 protrudes from the upper surface of the movable member 109. The receiving portion 109e is in sliding contact with a curved portion 122a that protrudes inward from both side edges of the opening 122.

A first driving body 124 is slidably held at the front end portion of the holder 108, and a spring 125 is interposed between the movable member 109. The tip of the first driving body 124 is pressed against the cam surface 110 of the first case 101 by the elastic force of the spring 125.
As described above, the operation member 107 and the holder 108 are rotatably connected and fixed to the operation lever 103, and the holder 108 and the cases 101 and 102 are rotatably connected to the support shafts 108d and 108e. ing.

  The operation will be described with reference to FIG. 8. When the operation lever 103 is in the neutral position, the first driver 124 is in the center of the cam surface 110 and is held at that position. At this time, the cam portion 104e of the first lever member 104 abuts at the apex of the cam surface 108c of the holder 108, and the first lever member 104 resists the biasing force of the torsion coil spring 106 as shown in FIG. Then, it moves backward and is positioned outside the rotation locus of the cancel projection 128.

  Next, when the operation lever 103 is rotated in either direction, the first driver 124 is slid and locked on the cam surface 110. At this time, the holder 108 and the movable member 109 are also rotated in the same direction. The apex of the cam surface 108c is disengaged from the cam portion 104e, and the first lever member 104 moves forward along the long holes 104a and 104b by the biasing force of the torsion coil spring 106 as shown in FIG. 104d advances into the rotation locus of the cancel protrusion 128.

  When the handle is rotated in the reverse direction from this state, the cancel protrusion 128 hits the contact portion 104d of the first lever member 104 during the return operation as shown in FIG. 8B, and the first lever member Since 104 rotates clockwise around the guide shaft 117, the curved portion 122 a of the second opening 122 presses the receiving portion 109 e of the movable member 109 upward, and this pressing force is applied to the holder 108 via the movable member 109. Therefore, the first driving body 124 moves away from the lock portion of the cam surface 110 and moves to the center, and the first and second lever members 104 and 105 are in the neutral position shown in FIG. Automatically recovers.

  On the other hand, in the state of FIG. 8B, when some force that prevents the automatic return is applied to the operation lever 103, the component force in the rotational direction of the second lever member 105 as shown in FIG. 8C. As a result, the receiving portion 109e is pressed along the curved portion 122a and the movable member 109 swings against the elastic force of the spring 125, so that the first and second lever members 104 and 105 interfere with the receiving portion 109e. It will be able to rotate without being.

JP 2001-6495 A

  However, in the structure of the above-described conventional turn signal switch device, since the torsion coil spring is used as an elastic member that urges the lever member toward the rotation locus of the cancel projection, the installation space for the torsion coil spring is reduced. There is a problem that it is difficult to reduce the size of the turn signal switch device because it is necessary to ensure a large amount.

  Accordingly, an object of the present invention is to provide a turn signal switch device that solves the above-described problems and can be miniaturized and can increase the degree of design freedom.

  In order to solve the above-mentioned problems, the present invention provides, as a first solving means, a housing having a cam surface, an operation lever rotatably supported by the housing, and a neutral operation lever in cooperation with the cam surface. A drive unit that is held at a position and an operating position; a first lever member that is rotated in contact with a cancel protrusion on the handle side; and the first lever member is elastically biased toward the rotation locus of the cancel protrusion. And a second lever member for returning the operation lever from the operating position to the neutral position in conjunction with rotation of the first lever member, and the operation lever is in the neutral position. The first lever member is retracted out of the rotation locus of the cancel projection against the elastic force of the first elastic member by the operation lever, and the first lever member is in the operating position when the first lever member is in the operating position. A turn signal switch device for causing a lever member to advance into a rotation locus of the cancel projection by an urging force of the first elastic member, wherein the housing is provided with a second elastic member in parallel with the first elastic member. When the operating lever is in the neutral position, the first elastic member can hold the first lever member in the rotational neutral position, and the second elastic member allows the second lever member to be held. Can be held in a neutral position, and the first elastic member and the second elastic member are formed by a thin plate spring having a flat plate portion, and the first elastic member and the second elastic member are formed in the housing. A holding portion having a first abutting portion that abuts on one side of each end of each member and a second abutting portion that abuts on the other side opposite to the first abutting portion is formed. The second abutting portion is connected to the first elastic member and It has a configuration which is arranged to face the a staggered position along the extending direction of the second elastic member.

Further, as a second solving means, the first contact portion and the second contact portion are symmetrical with respect to a direction perpendicular to the extending direction of the first elastic member and the second elastic member. It was set as the structure formed so that it might become.
Further, as a third solving means, the holding portion of the housing has at least one of the first contact portion and the second contact portion at a position higher than the bottom surface of the housing. It was set as the structure which formed the convex-shaped support part which supports an elastic member or a 2nd elastic member.
As a fourth solution, the first elastic member and the second elastic member are formed with different plate thicknesses and plate widths, and an elastic member with a small plate width is formed on the bottom surface of the housing. Correspondingly, a projecting portion that contacts the lower end portion of the elastic member is formed.

  As described above, the turn signal switch device of the present invention includes a housing having a cam surface, an operation lever rotatably supported on the housing, and the operation lever in a neutral position and an operation position in cooperation with the cam surface. A driving unit to be held; a first lever member that is rotated in contact with a cancel protrusion on the handle side; and a first elastic member that elastically biases the first lever member toward the rotation locus of the cancel protrusion; A second lever member for returning the operating lever from the operating position to the neutral position in conjunction with the rotation of the first lever member, and when the operating lever is in the neutral position, the first lever member is moved by the operating lever. When the operating lever is in the operating position, the first lever member is moved by the biasing force of the first elastic member against the elastic locus of the first elastic member. A turn signal switch device for advancing into a rolling locus, wherein a second elastic member is provided in the housing in parallel with the first elastic member, and the first elastic member causes the first elastic member when the operating lever is in a neutral position. The second elastic member can be held in the rotational neutral position by the second elastic member, and the first elastic member and the second elastic member can be held in the flat plate portion. And a first abutting portion that abuts on one side of each end of each of the first elastic member and the second elastic member on the housing, and on the other side opposite to the first elastic member. A holding portion having a second abutting portion that abuts is formed, and the first abutting portion and the second abutting portion are arranged at alternate positions along the extending direction of the first elastic member and the second elastic member. The first lever member and the second lever member are arranged opposite to each other. By providing the first and second elastic members that can be held in the rotation neutral position in parallel, the structure is simplified, and the installation space for the first elastic member that biases the first lever member is conventionally increased. Therefore, the apparatus can be reduced in size. Further, even if the plate thickness of each elastic member is small, the first contact portion and the second contact portion of the holding portion that holds the elastic member are opposed to positions that are staggered along the extending direction of the elastic member. Accordingly, the elastic member can be easily incorporated into the holding portion by bending the elastic member.

In addition, since the first contact portion and the second contact portion are formed so as to be line symmetric with respect to a direction orthogonal to the extending direction of the first elastic member and the second elastic member, Since both ends of the elastic member are securely held and the first and second lever members can be reliably given elastic force, the operation lever can be stably operated.
Further, the holding portion of the housing is provided with a convex that supports the first elastic member or the second elastic member at a position higher than the bottom surface of the housing on at least one of the first contact portion and the second contact portion. The turn signal switch device is excellent in operability because the flat plate portion of each elastic member does not rub against the bottom surface of the housing and the like, and the elastic urging force of each elastic member can be generated stably. Can provide.
In addition, the first elastic member and the second elastic member are formed with different plate thicknesses and plate widths, respectively, and the bottom surface of the housing is in contact with the lower end portion of the elastic member corresponding to the elastic member with a small plate width. Since the projecting portions that contact each other are formed, the height positions of the respective elastic members can be regulated by the projecting portions, so that erroneous incorporation of the first elastic member and the second elastic member can be prevented.

1 to 5 show an embodiment of a turn signal switch device of the present invention. FIG. 1 is an exploded perspective view of a turn signal switch device of the present invention, FIG. 2 is an explanatory view showing a state where an operation lever is in a neutral position by a cancel mechanism of the turn signal switch device, and FIG. 4 is an explanatory view showing a state in which the handle is rotated in the reverse direction while holding down the operation lever while waiting for cancellation, and FIG. 5 is a perspective view of a main part showing a holding structure of the holding portion of the housing and the elastic member. FIG.
2 to 4 show the canceling mechanism seen through from the bottom of the second case.

  The turn signal switch device according to the present embodiment includes first and second cases 1 and 2 made of synthetic resin forming a housing, an operation lever 3 rotatably supported by both cases 1 and 2, and both cases. An intermediate support member 4 disposed between 1 and 2 and also constituting a housing, first and second lever members 5 and 6 placed on the inner surface of the intermediate support member 4, and the first lever member 5 It is mainly composed of a first elastic member 7 that elastically urges in a direction protruding from the second case 2 and a second elastic member 8 that elastically urges the second lever member 6 so as to be held in a neutral position. As will be described later, the operation lever 3 includes a holder 9, a movable member 10, and the like. The first and second cases 1 and 2 are integrated using means such as snap coupling and are fixed to a stator member such as a column cover or a combination switch (not shown).

A V-shaped cam surface (not shown) is formed inside the first case 1, and this cam surface has a central valley portion and a pair of lock portions located on both sides. A second operating member 15 of the operation lever 3 to be described later is brought into sliding contact with the cam surface, and the operation lever 3 is locked at the neutral position and the operation position. The first case 1 is provided with a switch portion (not shown), which is driven by a turning operation of the operation lever 3 so as to perform a blinking operation of a lamp when turning left or right.
Further, the first case 1 and the second case 2 are provided with shaft holes 1a and 2a on the inner surfaces facing each other, and a holder 9 which will be described later is pivotally supported by the shaft holes 1a and 2a. Yes.

  The intermediate support member 4 which is a part of the housing is made of a synthetic resin and is formed in a substantially rectangular shape. The intermediate support member 4 is disposed between the first and second cases 1 and 2. The second shaft portions 4a and 4b are erected on the same line at a predetermined interval. Further, two pairs of spring receiving portions 4c and 4d are provided opposite to each other at the rectangular four corners. The first and second spring receiving portions 4c and 4d are formed of a thin plate metal leaf spring. Two elastic members 7 and 8 are juxtaposed and held in parallel. The pair of spring receiving portions 4 c constitutes a holding portion for the first elastic member 7, and the pair of spring receiving portions 4 d constitutes a holding portion for the second elastic member 8.

  Each of the spring receiving portions 4c and 4d is a projecting wall portion having a substantially rectangular shape in plan view that protrudes from the bottom surface 4g of the intermediate support member 4, and an opening is provided in one wall portion disposed opposite to each other. . Both ends of the first and second elastic members 7 and 8 are inserted and held in this opening. The opening includes first contact portions 4h and 4i that contact one surface side of both end portions of the first elastic member 7 and the second elastic member 8, and first contact portions that contact the other surface opposite to the first contact portions 4h and 4i. Two contact portions 4j and 4k are formed, respectively.

  The first contact portion 4h and the second contact portion 4j of the spring receiving portion 4c and the first contact portion 4i and the second contact portion 4k of the spring receiving portion 4d are the first elastic member 7 and the second contact portion 4k. Along the extending direction of the two elastic members 8, the elastic members 8 are arranged in parallel at opposite positions with a gap corresponding to the plate thickness of the elastic members interposed therebetween. That is, the opening formed between the first contact portion 4h and the second contact portion 4j and between the first contact portion 4i and the second contact portion 4k is approximately the thickness of each elastic member. It forms so that it may become a clearance gap, and the 1st contact parts 4h and 4i and the 2nd contact parts 4j and 4k are each arrange | positioned in zigzag form.

  When the first and second elastic members 7 and 8 are inserted into the respective spring receiving portions 4c and 4d, the respective elastic members are bent (curved) and the first contact portions 4h and 4i are connected to the first contact portions 4h and 4i. 2 It is possible to incorporate in an inclined state with respect to the abutting portions 4j and 4k, and each elastic member can be easily bent into the plate thickness direction by bending (bending) each elastic member into the spring receiving portions 4c and 4d. It can be incorporated. Further, even when the elastic member is thin (thin), the first contact portions 4h and 4i and the second contact portions 4j and 4k are provided in a staggered manner in the extending direction of the elastic member. Therefore, the opening (gap corresponding to the plate thickness) of the holding portion can be easily formed.

  Further, one pair of spring receiving portions 4c and the other pair of spring receiving portions 4d are provided to face the square portions of the intermediate support member 4, respectively. In this case, one pair of spring receiving portions 4c. The first contact portion 4h and the second contact portion 4j provided on the first contact portion 4j and the first contact portion 4i and the second contact portion 4k provided on the other pair of spring receiving portions 4d are respectively the first contact portion 4h and the second contact portion 4j. The elastic member 7 and the second elastic member 8 are formed in a positional relationship that is line symmetric with respect to a direction orthogonal to the extending direction. That is, the first and second elastic members 7 and 8 are formed so that the distance from the midpoint position of each of the first and second elastic members 7 and 8 to the first contact portions 4h and 4i that are one holding portion at both ends is the same distance. Similarly, the distance from each middle point position to the second abutting portions 4j and 4k, which are the other holding portions at both ends, is also formed to be the same distance.

In the present embodiment, the distance from the midpoint position of each of the first and second elastic members 7 and 8 to the first contact portions 4h and 4i is the distance between the first and second elastic members 7 and 8. At positions that are staggered along the extending direction of the first elastic member 7 and the second elastic member 8 so as to be shorter than the distance from each middle point position to the second contact portions 4j, 4k. Is formed.
In this way, the first contact portions 4h, 4i and the second contact portions 4j, 4k are line symmetric with respect to the direction orthogonal to the extending direction of the first elastic member 7 and the second elastic member 8. As a result, the both end portions of each elastic member can be securely held, and the first and second lever members 5 and 6 can be reliably given elastic force.

Further, convex support portions 4l and 4m having receiving surfaces at positions higher than the bottom surface 4g of the central support member 4 are provided so as to be connected to the first contact portions 4h and 4i of the spring receiving portions 4c and 4d. Yes. The support portions 4l and 4m hold both end portions of the first and second elastic members 7 and 8 held by the spring receiving portions 4c and 4d.
In this way, the first elastic member or the second elastic member is supported at a position higher than the bottom surface 4g of the central support member 4 by connecting the spring receiving portions 4c and 4d to the first contact portions 4h and 4i. By forming the convex support portions 4l and 4m, the flat plate portions of the elastic members are not rubbed by the bottom surface of the housing, and the elastic biasing force of the elastic members can be generated stably.
In the above-described embodiment, the support portions 4l and 4m are provided so as to be connected to the first contact portions 4h and 4i of the spring receiving portions 4c and 4d. It may be provided so as to be connected to the second contact portions 4j, 4k.

Further, the bottom surface 4g of the intermediate support member 4 is formed with a protruding protrusion 4n that comes into contact with the lower end of each elastic member. The protruding portion 4n is provided on either the spring receiving portion 4c or the spring receiving portion 4d, and is formed in the vicinity of the spring receiving portion 4c or 4d. In the present embodiment, the first elastic member 7 and the second elastic member 8 are formed with different plate thicknesses and plate widths, respectively, and by providing a protrusion 4 n on the bottom surface 4 g of the intermediate support member 4, 4 n of protrusions and the lower end part of an elastic member with a small board width contact | abut.
Thus, by forming the protruding portion 4n that contacts the lower end portion of the elastic member corresponding to the elastic member having a small plate width on the bottom surface 4g of the intermediate support member 4, the height position of each elastic member is formed by the protruding portion 4n. Therefore, it is possible to prevent erroneous incorporation of the first elastic member 7 and the second elastic member 8 having different shapes.

  The first lever member 5 is made of a synthetic resin and has a substantially rectangular shape, and has a long hole 5a at the center. The elongated hole 5a is inserted into the first shaft portion 4a of the intermediate support member 4, and the first lever member 5 is rotatable and slidable along the first shaft portion 4a. Further, a cam portion 5b is erected on one end side, and the tip of the cam portion 5b is formed in a mountain shape that is convex toward the rotation locus of the cancel projection. Further, a contact portion 5c that contacts the cancel protrusion 20 of the handle is provided on the other end side facing the cam portion 5b. One end side where the cam portion 5b is provided is a flat flat portion 5d, and the flat plate portion of the first elastic member 7 is in contact with the flat portion 5d.

  The second lever member 6 is made of a synthetic resin and formed in a flat plate shape, and is provided with a shaft hole 6a at a substantially center. This shaft hole 6a is inserted into the second shaft portion 4b of the intermediate support member 4 so as to be rotatable. An opening 6b and a notch 6c are provided across the shaft hole 6a. A connecting pin 6d projects from one opening end of the opening 6b, and a pair of actuating arm portions 6e on both sides of the notch 6c. Is provided. The distal end side of the operating member 6e is a flat flat portion 6f that is the same plane, and the flat plate portion of the second elastic member 8 is in contact with the flat portion 6f.

The second lever member 6 is overlaid on the first lever member 5 with respect to the inner surface of the intermediate support member 4, and the first lever member 5 and the second lever member 6 have a long hole 5 a. They are connected by a connecting pin 6d so that they can rotate and slide.
In this case, the connecting portion between the first lever member 5 and the second lever member 6 is formed so as to be positioned closer to the rotation locus of the cancel projection 20 than the first and second shaft portions 4a and 4b. Therefore, the second operation lever 6 can be reliably rotated along with the rotation of the first operation lever 5, and the operation of the cancel mechanism can be stabilized. .

  The flat portion 5 d of the first lever member 5 protrudes from the opening 6 b of the second lever member 6 toward the second case 2, and the first lever member 5 is elongated by the first elastic member 7. Is elastically biased toward the rotation locus of the cancel projection 20 in the longitudinal direction. The first elastic member 7 is made of a thin plate-like metal leaf spring, and has a locking portion 7a on both ends locked to the spring receiving portion 4c of the intermediate support member 4, and a central flat plate portion 7b. The central portion of the flat plate portion 7 b is in contact with the flat portion 5 d of the first lever member 5. Further, the cam portion 5b of the first lever member 5 protrudes toward the first case through an opening 4e provided on the inner surface of the intermediate support member 4, and this cam portion 5b is a cam portion of the movable member 10 described later. The first lever member 5 slides in the longitudinal direction of the long hole 5a in sliding contact with 10b.

  Further, the second lever member 6 is elastically biased to the neutral position by the second elastic member 8. This second elastic member 8 is also made of a thin plate-like metal leaf spring, and has a latching portion 8a on both ends latched by the spring receiving portion 4d of the intermediate support member 4, and a central flat plate portion 8b. The central portion of the flat plate portion 8 b is in contact with the flat portion 6 f of the second lever member 6.

  In this way, the first flat portion 5d is formed on one end side of the first lever member 5, the flat plate portion 7b of the first elastic member 7 is brought into contact with the first flat portion 5d, and the second A second flat portion 6f is formed on one end side of the lever member 6, and the flat plate portion 8b of the second elastic member 8 is brought into contact with the second flat portion 6f, whereby the first lever member 5 and the second lever. Since the member 6 can be held in the rotation neutral position, the first and second lever members 5 and 6 can be held by the flat portions 5d and 6f, respectively, so that the rotation neutral position is surely achieved. It can be held in.

  The intermediate support member 4 disposed between the first and second cases 1 and 2 described above, the first and second lever members 5 and 6, and the first and second elastic members 7 and 8 are turned. A cancel mechanism portion of the signal switch device is configured.

The operation lever 3 includes a holder 9 and a movable member 10, and includes first and second actuating members 11 and 15 and a torsion coil spring 19.
The operation lever 3 is made of synthetic resin and has a base portion 3a and a lever portion 3b. A first actuating member 11 is held at the rear end of the base portion 3a. Further, both side portions of the base portion 3a have support shafts 3c. The support shafts 3c are supported by the holder 9 and can be rotated in the longitudinal (front-rear) direction. Further, a drive projection hole 3d for inserting a drive projection (not shown) is provided on the upper surface of the base 3a, and this drive projection is connected to a switch portion (not shown) provided in the first case 1. ing.

  The first actuating member 11 includes a synthetic resin driving body 12, a coil spring 13 that biases the driving body 12, and a rotating member 14 attached to the tip of the driving body 12. Then, it comes into sliding contact with the cam surface of the holder 9 (not shown). Then, by rotating the operation lever 3 in the longitudinal (front / rear) direction, the rotating member 14 slides on the cam surface to switch the switch portion, and the beam switching and the passing operation are appropriately performed.

  The holder 9 is made of synthetic resin, and has an opening 9a that engages with the base 3a of the operation lever 3 on the front surface, and the rotating member 12 of the first actuating member 12 slides inside the opening 9a. A cam portion (not shown) is provided. Further, support shafts 9b and 9c are provided at the upper and lower ends of the opening 9a, and the support shafts 9b and 9c are supported by the shaft holes 1a and 2a of the first and second cases 1 and 2 so as to be rotatable. Is attached. Further, shaft holes 9d and 9e for pivotally supporting the support shaft 3c of the operation lever 3 are provided on both sides of the opening 9a. A second operating member 15 is held at the rear end of the holder 9, and a driving projection 9 f is provided on the upper surface of the rear end, and this driving projection 9 f is disposed in the first case 1. Not connected to the switch part. Further, on the upper surface of the holder 9, there is provided a window hole 9 g from which the driving projection inserted into the driving projection hole 3 d provided at the base of the operation lever 3 projects.

  The second actuating member 15 includes a synthetic resin driving body 16, a coil spring 17 that urges the driving body 16, and a rotating member 18 attached to the tip of the driving body 16. As it rotates in the direction, it comes into sliding contact with the cam surface of the first case 1 (not shown). Then, by rotating the operating lever 3 in the lateral (left / right) direction, the rotating member 18 slides on the cam surface and the switch portion is switched, and the lamp blinking operation is appropriately performed when turning left or right. It will be a thing.

A movable member 10 made of synthetic resin is disposed on the lower surface side of the holder 9. One end side of the movable member 10 is provided with a spring locking portion 10a, and one end of the torsion coil spring 19 is locked to the spring locking portion 10a. It is locked to. That is, the movable member 10 is attached to the holder 9 through the torsion coil spring 19 so as to be slightly rotatable.
Further, a mountain-shaped cam portion 10 b is provided on one end side of the movable member 10, and the cam of the first lever member 5 is passed through the opening 4 e provided on the inner surface of the intermediate support member 4. The portion 5b is brought into contact with and slidably contacted. At this time, the first lever member 5 is in sliding contact with the cam portion 10b of the movable member 10, so that the first lever member 5 slides in the longitudinal direction of the long hole 5a.

  Further, a projecting columnar receiving portion 10c protruding toward the intermediate support member 4 is provided on the other end side of the cam portion 10b of the movable member 10, and the receiving portion 10c is a notch portion 4f of the intermediate support portion 4. The second lever member 6 is disposed so as to extend into the notch 6c. The receiving portion 10c is held in contact with the operating arm portion 6e of the second lever member 6 when the operation lever 3 is rotated in the lateral (left / right) direction and locked in the operating position.

Next, the operation of the turn signal switch device configured as described above will be described with reference to FIGS.
First, as shown in FIG. 2, when the operation lever 3 is in the neutral position, the tip of the second actuating member 15 abuts against the central valley of the cam surface (not shown) of the case 1 and is held at that position. Has been. At this time, the cam 5b of the first lever member 5 is in contact with the apex of the mountain-shaped cam portion 10b of the movable member 10, and the first lever member 5 is the first elastic member as shown in FIG. Retreating against 7 urging forces.
Therefore, the contact portion 5c of the first lever member 5 is located outside the rotation locus of the cancel projection 20 that rotates in conjunction with the handle, and even if the handle is rotated in this state, the cancel projection 20 remains in the first position. The operation lever 3 is maintained in the neutral position without contacting the contact portion 5c of the first lever member 5.

  When the operation lever 3 is rotated from the neutral position in either of the lateral (left and right) directions, the tip of the second operating member 15 slides on the cam surface of the case 1 (not shown) and is provided on both sides. When it is locked to the lock part and gets over the slope of the cam surface, a click feeling is generated.

Here, for example, when the operation lever 3 is rotated in the direction of arrow B in FIG. 1, the holder 9 and the movable member 10 are also rotated in the same direction in conjunction with the operation lever 3. As shown in FIG. 3, the first lever member 5 receives the elastic force of the first elastic member 7 and moves forward along the longitudinal direction of the long hole 5a, so that the contact portion 5c is canceled. It advances into the rotation trajectory of the protrusion 20.
At this time, as the operating lever 3 rotates in the direction of arrow B, the receiving portion 10c of the movable member 10 held at the stable position of the holder 9 is displaced in the notch 6c of the second lever member 6. As shown in FIG. 3, the receiving portion 10c comes into contact with one operating arm portion 6e of the notch 6c. Further, as the operating lever 3 rotates in the direction of arrow B, the drive projection 9f of the holder 9 drives a switch portion (not shown) disposed on the first case 1, so that the contact is switched. An unillustrated right turn lamp blinks.

In the right turn state shown in FIG. 3, when the handle is rotated in the reverse direction (the arrow direction in FIG. 3), the cancel protrusion 20 hits the contact portion 5 c of the first lever member 5 during the return operation. As a result, the first lever member 5 rotates about the first shaft portion 4a in the clockwise direction in the figure, and accordingly, the second lever member 6 connected to the first lever member 5 is moved. Since the second arm 4e rotates in the clockwise direction around the second shaft 4b, the operating arm 6e of the second lever member 6 is rotationally displaced upward in FIG.
Accordingly, the operating arm 6e presses the receiving portion 10c of the movable member 10 upward, and this pressing force is transmitted to the holder 9 via the movable member 10, so that the second operating member held by the holder 9 is used. The tip of 15 is removed from the lock portion of the cam surface (not shown) of the first case 1 and moves to the central valley, and the operation lever 3 and the first and second lever members 5 and 6 are neutral as shown in FIG. Automatically return to position.

  In this way, the second lever member 6 facing the first lever member 5 is provided with a pair of operating arm portions 6e, and the operating arm portions 6e are movable in conjunction with the rotation of the first lever member 5. Since the operating lever 3 is returned from the operating position to the neutral position by rotating the holder 9 via the movable member 10 in contact with the receiving portion 10c provided protruding from the member 10, the cam surface or the like There is no need to provide it, the configuration is simplified, and the operation lever 3 can be reliably returned to the neutral position.

  In addition, when some force for preventing the automatic return is applied to the operation lever 3 in the right turn state illustrated in FIG. 3, for example, when the handle is rotated in the reverse direction while pressing the operation lever 3, The lever member 6 tries to rotate clockwise about the second shaft portion 4b, but the holder 9 does not rotate because the operation lever 3 is pressed, and the receiving portion of the operating arm portion 6e and the movable member 10 An excessive load is generated at the contact portion with 10c.

When such an overload occurs, as shown in FIG. 4, the receiving portion 10 c is pressed along the operating arm portion 6 e by the component force in the rotational direction of the second lever member 6, and the movable member 10 is turned into a torsion coil. Since the receiving portion 10c swings slightly from the stable position indicated by the dotted line in FIG. 4 to the retracted position indicated by the solid line (cross section) because it rotates slightly against the repulsive force of the spring 19, the first and second levers The members 5 and 6 can rotate without being obstructed by the receiving portion 10c.
Then, when the cancel projection 20 passes through the contact portion 5c of the first lever member 5, the movable member 10 automatically returns from the retracted position to the stable position by the repulsive force of the torsion coil spring 19, so that it is shown again in FIG. Maintained to turn right.

  Thus, the overload generated at the contact portion between the operating arm portion 6e of the second lever member 6 and the receiving portion 10c of the movable member 10 during the canceling operation is released (absorbed) by the swinging of the movable member 10. Damage to the components of the power transmission system including the levers 5 and 6 and the movable member 10 is prevented.

  On the other hand, when the operation lever 3 is rotated in a direction orthogonal to the indicated position (a direction orthogonal to arrows A and B in FIG. 1), as described above, the operation lever 3 and the first operating member 11 are moved to the housing (both cases). 1, 2) and the holder 9 are rotated by a predetermined angle in the vertical direction with a straight line connecting the support shafts 3c, 3c as the rotation axis, and the tip of the first actuating member 11 is in the opening 9a of the holder 9 accordingly. It slides on the cam part (not shown), and a click feeling is generated. At this time, as the operation lever 3 rotates, the drive projection inserted into the drive projection hole 3d drives a switch portion (not shown) disposed in the first case 1, so that the contact is switched. Beam switching and passing operations are performed.

According to the above-described embodiment of the present invention, the second elastic member 8 is provided on the intermediate support member 4 in parallel with the first elastic member 7, and when the operation lever 3 is in the neutral position, the first elastic member 7, the first lever member 5 can be held in the rotation neutral position, and the second elastic member 8 can hold the second lever member 6 in the rotation neutral position. The second elastic member 8 is formed of a thin plate spring having a flat plate portion, and the first elastic member 7 is in contact with one surface of each end portion of the first elastic member 7 and the second elastic member 8 on the intermediate support member 4. Spring receiving portions 4c and 4d having abutting portions 4h and 4i and second abutting portions 4j and 4k abutting on the other surface opposite to the abutting portions 4h and 4i are formed, and the first abutting portions 4h and 4i and the second abutting portions are formed. Positions at which the contact portions 4j and 4k are staggered along the extending direction of the first elastic member 7 and the second elastic member 8 Since the first lever member 5 and the second lever member 6 can be held at the rotation neutral position, the first and second elastic members 7 and 8 are provided in parallel. As a result, the structure is simplified, and the installation space of the first elastic member 7 for biasing the first lever member 5 can be greatly reduced as compared with the conventional case, so that the apparatus can be downsized.
Further, even if the plate thickness of each elastic member is small, the first contact portions 4h and 4i and the second contact portions 4j and 4k of the spring receiving portions 4c and 4d that hold the respective elastic members are connected to each other. Since they are arranged side by side opposite to each other along the installation direction, they can be easily incorporated into the spring receiving portions 4c and 4d by bending each elastic member.

It is a disassembled perspective view which shows the turn signal switch apparatus of this invention. It is explanatory drawing which shows the state of an operation lever in the neutral position with the cancellation mechanism of the turn signal switch apparatus of this invention. It is explanatory drawing which shows the state waiting for cancellation by the cancellation mechanism of the turn signal switch apparatus of this invention. It is explanatory drawing which shows the state which rotated the handle | steering-wheel in the reverse direction, pressing the operation lever in the cancellation waiting state of the cancellation mechanism of this invention. It is a principal part perspective view which shows the holding structure of the holding part and elastic member of the housing of this invention. It is a disassembled perspective view which shows the conventional turn signal switch apparatus. It is a bottom view which shows the conventional cancellation mechanism. It is operation | movement explanatory drawing of the conventional cancellation mechanism.

Explanation of symbols

1: first case 1a: shaft hole 2: second case 2a: shaft hole 3: operation lever 3a: base portion 3b: lever portion 3c: support shaft 3d: hole 4: intermediate support member 4a: first shaft portion 4b: Second shaft portion 4c: Spring receiving portion (holding portion)
4d: Spring receiving part (holding part)
4e: Opening 4f: Notch 4g: Bottom 4h: First contact 4i: First contact 4j: Second contact 4k: Second contact 4l: Support 4m: Support 4n: Projecting Part 5: First lever member 5a: Long hole 5b: Cam part 5c: Contact part 5d: Flat part 6: Second lever part 6a: Shaft hole 6b: Opening 6c: Notch 6d: Connecting pin 6e: Actuation Arm portion 6f: Flat portion 7: First elastic member 7a: Locking portion 7b: Flat plate portion 8: Second elastic member 8a: Locking portion 8b: Flat plate portion 9: Holder 9a: Opening portion 9b: Support shaft 9c : Support shaft 9d: shaft hole 9e: shaft hole 9f: drive projection 9g: window hole 10: movable member 10a: spring locking portion 10b: cam portion 10c: receiving portion 11: first actuating member 12: drive body 13: Coil spring 14: Rotating member 15: Second operating member 16: Driver 17: Coil spring 18: Rotating member 19: Torsion coil spring 0: Cancel projections

Claims (4)

  A housing having a cam surface, an operation lever rotatably supported by the housing, a drive unit that holds the operation lever in a neutral position and an operation position in cooperation with the cam surface, and a cancel protrusion on the handle side A first lever member that rotates in contact with the first lever member, a first elastic member that elastically biases the first lever member toward the rotation locus of the cancel protrusion, and rotation of the first lever member. And a second lever member that interlocks and returns the operating lever from the operating position to the neutral position, and when the operating lever is in the neutral position, the first lever member is moved to the first elastic member by the operating lever. The first lever member is retracted by the urging force of the first elastic member when the operation lever is in the operating position by retreating from the rotation locus of the cancel protrusion against the elastic force of the member. A turn signal switch device for advancing into a starting rotation locus, wherein the housing is provided with a second elastic member in parallel with the first elastic member, and when the operating lever is in a neutral position, the first The first elastic member can hold the first lever member in the rotation neutral position, and the second elastic member can hold the second lever member in the rotation neutral position. A member and a second elastic member are formed of a thin plate spring having a flat plate portion, and a first contact is made to contact the housing on one surface side of each end portion of the first elastic member and the second elastic member. And a holding portion having a second abutting portion that abuts on the other surface side opposite to the first abutting portion and the second abutting portion. The positions of the elastic members that are staggered along the extending direction Turn signal switch device, characterized in that juxtaposed with.   The first contact portion and the second contact portion are formed so as to be line symmetric with respect to a direction orthogonal to the extending direction of the first elastic member and the second elastic member. The turn signal switch device according to claim 1.   In the holding portion of the housing, the first elastic member or the second elastic member is provided at a position higher than the bottom surface of the housing on at least one of the first contact portion and the second contact portion. The turn signal switch device according to claim 1, wherein a convex support portion for supporting is formed. The first elastic member and the second elastic member are formed with different plate thicknesses and plate widths, and the bottom surface of the housing corresponds to an elastic member with a small plate width on the bottom surface of the housing. The turn signal switch device according to any one of claims 1 to 3, wherein a projecting portion that comes into contact with the turn signal is formed.

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