JP2004172059A - Lever switch for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever switch for a vehicle, which reduces a processing cost by enabling an assembly relatively low in precision and can improve workability when assembled, while being miniaturized in whole. <P>SOLUTION: In the lever switch for the vehicle including an operation lever 3 installed oscillatably with respect to an oscillating axis formed on a lever switch body (a lower switch body 1 and an upper switch body 2) and a transmitting member selectively performing contact and separation between a movable contact point 6a and a fixed contact point 11 according to an oscillating movement of the operation lever 3, the transmitting member is composed of a cam member 4 which is turnably arranged on a turning shaft 9 and on which a plurality of cam surfaces 4a performing the contact and the separation between the movable contact point 6a and the fixed contact point 11 are formed, and is assembled in a state where a projection 4b of the cam member 4 is in contact with a periphery surface 3b of the operation lever 3 while energized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicular lever switch having an operation lever provided near a steering wheel of an automobile, for example.
[0002]
[Prior art]
Generally, a dimmer switch for switching a headlight of a vehicle between a high beam (forward irradiation), a low beam (downward irradiation) and passing is performed by swinging an operation lever provided near a steering wheel. Such an operating lever is swingably attached to a lever switch body on which a movable contact and a fixed contact are formed, and selectively contacts and separates the movable contact and the fixed contact with the swing operation. Was composed.
[0003]
Specifically, as shown in FIG. 6, the vehicle lever switch includes an operation lever 101 that can swing around a swing shaft 102, and the arm portion 103 is moved from a base end side of the operation lever 101. It is configured to extend. A roller 104 having a movable contact (not shown) is attached to the tip of the arm 103 so as to be slidable in the direction shown in FIG. 104 was slid, and the movable contact and the fixed contact were selectively contacted and separated.
[0004]
However, in order to perform a reliable switching operation, the displacement amount of the roller 104 must be set large. However, in the above-described vehicle lever switch, the displacement amount of the roller 104 during the swing operation of the operation lever 101 is reduced. In order to increase the size, the protrusion size of the arm portion 103 must be set long, and there is a problem that the entire lever switch becomes large.
[0005]
Therefore, a lever switch for a vehicle as disclosed in Patent Document 1 has been conventionally proposed. In this document, a transmission member rotatable around an axis formed on a base end side of an operation lever is provided, and the transmission member rotates with the swing of the operation lever to slide the roller. A lever switch for a vehicle is disclosed. That is, the roller is slid while converting the swing operation of the operation lever into the rotation operation of the transmission member.
[0006]
More specifically, the transmission member includes a drive arm and a driven arm, of which a notch is formed at the tip of the drive arm, and a notch is formed through the notch so that a convex displacement transmission portion provided at the tip of the operation lever is inserted. And the leading end of the driven arm is connected to a roller having a movable contact. By transmitting the swinging operation of the operation lever to the roller via the transmission member as described above, the size from the base end of the operation lever to the roller can be set small, and the entire lever switch can be downsized. .
[0007]
[Patent Document 1]
Japanese Utility Model Registration No. 2563129
[Problems to be solved by the invention]
However, in the above-mentioned conventional vehicle lever switch, since a convex displacement transmitting portion must be inserted into the notch at the tip of the transmitting member and assembled, extremely high assembling accuracy is required, and the processing cost may increase. There is a problem that workability when assembling the transmission member to the operation lever is poor. That is, in order to manufacture a transmission member requiring high assembly accuracy, a high-precision processing means and method are required, so that the processing cost is increased, and at the time of assembly, the notch at the tip of the transmission member has a convex shape. Therefore, the workability is poor because it is necessary to insert the displacement transmitting portion of the first member.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and it has been made possible to reduce the processing cost by making it possible to assemble with relatively low accuracy while reducing the overall size, and to improve the workability at the time of assembling. It is an object of the present invention to provide a vehicular lever switch that can be used.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a lever switch body having a movable contact and a fixed contact formed thereon, an operation lever swingably mounted on a swing shaft formed on the lever switch body, and an operation lever of the operation lever. A transmission member for selectively performing contact and separation between the movable contact and the fixed contact according to the swinging operation, wherein the transmission member includes a rotating shaft formed on the lever switch body. And a cam member having a plurality of cam surfaces formed thereon so as to be rotatable and to make contact and separation between the movable contact and the fixed contact, and a part of the cam member is a peripheral side surface of the operation lever. The movable contact is formed at the tip of a plurality of swingable contact plates, and is contacted and separated from the fixed contact by the swing of the contact plate. Do And a plurality of pressing members are formed corresponding to the respective cam surfaces of the cam member, and the pressing members swing the contact plate in accordance with the displacement of the cam surface accompanying the rotation of the cam member. And
[0011]
According to a second aspect of the present invention, in the vehicle lever switch according to the first aspect, the pressing member has a swing arm that can swing with respect to a swing shaft formed in the lever switch main body, A contact portion abutting on the cam surface of the cam member and a holding portion abutting on each of the contact plates are formed near the tip of the swing arm.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
The vehicle lever switch according to the present embodiment is mounted near a steering wheel of an automobile (for example, a steering pipe), and switches a headlight (headlight) of the vehicle between a high beam (forward irradiation), a low beam (downward irradiation), and passing. It constitutes a dimmer switch.
[0013]
As shown in FIGS. 1 to 5, such a vehicle lever switch includes a lower main body 1 and an upper main body 2, which constitute a lever switch main body, an operation lever 3, a cam member 4 as a transmission member, and a pressing member 5. It is mainly composed of The lower main body 1 and the upper main body 2 are made of a resin molded product, and are configured so that they can be fixed to a housing (not shown) with the upper main body 2 covering the upper part of the lower main body 1. Attached to the steering pipe.
[0014]
As shown in FIG. 4, a plurality of (three in this embodiment) contact plates 6 having movable contacts 6 a at their respective ends are attached to the back surface of the lower main body 1. When pressed and bent, the contact plate 6 can swing about the base end. A fixed contact 11 (see FIG. 5) is formed at a position opposite to the movable contact 6a on the back side of the lower main body 1, and when the contact plate 6 is not bent, the fixed contact 11 is movable. The contact 6a is in a contact state.
[0015]
Further, the lower main body 1 is formed with a plurality of (three in this embodiment) through-holes 1a facing part of each contact plate 6 as viewed from above, and corresponds to each through-hole 1a. A plurality of pressing members 5 are provided. The pressing member 5 is made of a resin molded part, and as shown in FIG. 2, has an insertion hole 5 a through which the swing shaft 7 can be inserted, and can swing about the swing shaft 7. It has a swing arm 5b.
[0016]
In the vicinity of the tip of the swing arm 5b, a contact portion 5ba abutting on the cam surface 4a (see FIG. 3) of the cam member 4 and a holding member that is inserted into the through hole 1a and abuts on each of the contact plates 6 A portion 5bb is formed. When the cam surface 4a presses the contact portion 5ba downward with the rotation of the cam member 4, the swing arm 5b swings about the swing shaft 7, and the pressing portion 5bb moves in the direction c in FIG. The contact plate 6 swings by bending the contact plate 6 downward. As a result, the movable contact 6a is separated from the fixed contact 11.
[0017]
The upper main body 2 is formed with a through hole 2a facing the contact portion 5ba of the swing arm 5b when viewed from above when the upper main body 2 is assembled to the lower main body 1. The cam member 4 is interposed. As shown in FIG. 3, the cam member 4 has a plurality of cam surfaces 4a and a protrusion 4b protruding upward at a part thereof.
[0018]
Further, an insertion hole 4c for inserting the rotation shaft 9 is formed in the axial direction of the cam member 4, and by attaching the rotation shaft 9 to a peripheral portion of the through hole 2a, the cam member 4 is formed. It is rotatable on the pressing member 5. Further, a torsion coil spring 8 is interposed between the rotating shaft 9 and the cam member 4, and the projecting portion 4b of the cam member 4 is always urged in the direction of the arrow in FIG.
[0019]
On the other hand, the cam surfaces 4a formed on the cam member 4 extend in three rows substantially perpendicular to the rotation shaft 9, and the cam surfaces 4a of each row are 5ba can be pressed. That is, any one of the cam surfaces 4 a operates the predetermined pressing member 5 based on the rotation angle of the cam member 4, and the movable contact 6 a and the fixed contact 11 can be selectively contacted and separated. is there.
[0020]
A receiving portion 2b having an upper surface formed in an arc shape is formed at one end of the upper body 2, and the operation lever 3 is assembled to the receiving portion 2b. As shown in FIG. 5, the operation lever 3 is swingably attached to the swing shaft 10 in the direction a in FIG. 5, and the HI position where the headlight of the vehicle is a high beam, the LO position where the vehicle headlight is a low beam, and passing. It is configured to be able to be located at the PASS position to be operated.
[0021]
That is, the wavy uneven portion 12 is formed in the upper main body 2, and the projecting portion 3 a which is in contact with the uneven shape portion 12 while being urged against the uneven shape portion 12 is arranged to protrude from the base end of the operation lever 3. Therefore, the operation lever 3 is configured to be able to be positioned at any one of the three positions. Further, with such a configuration, it is possible to provide a moderation when operating the operation lever 3 between adjacent positions, thereby improving operability.
[0022]
Here, in a state where the operation lever 3 is assembled, the protruding portion 4b of the cam member 4 comes into contact with the peripheral side surface 3a while being urged. More specifically, the protrusion 4b of the cam member 4 is disposed so as to abut on a predetermined portion of the lower surface of the peripheral side surface 3a between the swing shaft 10 of the operation lever 3 and the base end. Is urged by the torsion coil spring 8, the projecting portion 4b is brought into contact with a predetermined portion of the peripheral side surface 3a with an urging force.
[0023]
Next, the operation of the vehicle lever switch having the above configuration will be described.
When the driver grips the tip of the operation lever 3 to switch the headlight of the automobile and swings, the operation lever 3 swings around the swing shaft 10 between the respective positions. Accordingly, the protruding portion 4b of the operation lever 3 which abuts on the peripheral side surface 3a is pressed downward, and the cam member 4 rotates against the urging force of the torsion coil spring 8.
[0024]
The three rows of cam surfaces 4a simultaneously rotate with the rotation of the cam member 4, but the cam surfaces 4a corresponding to the rotation angles of the cam members 4 press the contact portions 5ba of the predetermined pressing members 5. Will be done. The pressed pressing member 5 swings about the swinging shaft 7 and the pressing portion 5bb moves downward in FIG. 5 to press the contact plate 6 immediately below, so that the contact plate 6 is bent and movable. The contact 6a can be separated from the fixed contact 11.
[0025]
For example, when the operation lever 3 is set to the LO position, as shown in FIG. 5, one of the three rows of cam surfaces 4a of the cam member 4 does not swing the pressing member 7, while the other cam surface 4a. Swings the corresponding pressing member 7 to separate the movable contact 6 a of each contact plate 6 from the fixed contact 11. Therefore, only the circuit corresponding to the contact plate 6 in which the pressing member 7 does not operate and is not bent becomes conductive, and the headlight is set to a low beam.
[0026]
Similarly, when the operating lever 3 is set to the HI position or the PASS position, only a predetermined circuit that does not operate the pressing member 7 conducts, and the headlight can be switched to high beam or passing. Thus, only the movable contact 6a corresponding to the position of the operation lever 3 can be brought into contact with the fixed contact 11 to make it conductive, and desired switching of the headlight can be performed.
[0027]
According to the vehicular lever switch, the swing of the operation lever 3 is transmitted to the predetermined contact plate 6 by the cam member 4 which rotates in conjunction with the operation lever 3, so that the movable contact 6 a and the fixed contact 11 are connected. Since the contact and the separation are selectively performed, the displacement of the movable contact 6a can be increased while the size of the lever switch is reduced, and a reliable switching operation can be achieved.
[0028]
In addition, since a part (projection 4b) of the cam member 4 as a transmission member is assembled in a state where the cam member 4 is in contact with the peripheral side surface 3b of the operation lever 3 while being urged, the transmission member is relatively low in accuracy. As a result, the processing cost can be reduced, and the workability at the time of assembling can be improved.
[0029]
In addition, the operation of the cam member 4 is transmitted to the contact plate 6 by the pressing member 5 pressing the contact plate 6 downward, so that the contact plate 6 is transmitted as compared with a member that transmits by sliding operation like a roller. In this case, the sliding friction or the like on the working surface can be avoided, and the life of the contact plate 6 can be extended.
[0030]
Further, since the pressing member 5 has the swing arm 5b, the contact plate 6 is swung by the swing operation of the swing arm 5b, and the movable contact 6a and the fixed contact 11 are contacted or separated. In addition, the sliding member such as the conventional roller can be completely eliminated from the transmission member, and the sliding friction and the like can be avoided, and the operation can be smoothly performed to improve the operability of the lever switch.
[0031]
Although the present embodiment has been described above, the present invention is not limited to this, and can be applied to, for example, a lever switch other than a dimmer switch of an automobile. Further, the pressing member interposed between the cam member and each contact plate may be configured to slide vertically, and even in this case, it is possible to suppress the sliding friction on the operating surface of the contact plate. it can.
[0032]
Further, in the present embodiment, the turning operation of the cam member 4 is transmitted to each contact plate 6 via the pressing member 5, but the cam surface of the cam member is directly connected to each contact plate without the pressing member 5 being interposed. You may make it contact the board 6. Although the projection 4b of the cam member 4 is in contact with the lower surface of the peripheral side surface 3b of the operation lever 3 while being urged, the projecting portion 4b may be configured to contact with the upper surface side of the peripheral side surface 3b. Good.
[0033]
Further, in the present embodiment, the movable contact is configured to be separated from the fixed contact when the contact plate is bent and swings, but in a normal state, the movable contact and the fixed contact are separated while facing each other, The movable contact may come into contact with the fixed contact when the contact plate bends and swings. Of course, in this case, it is necessary to change the cam surface of the cam member so that it can operate as described above.
[0034]
【The invention's effect】
According to the first aspect of the present invention, the entire vehicle lever switch can be reduced in size by the rotating transmission member, and at the same time, a part of the cam member having the cam surface is formed on the peripheral side surface of the operation lever. Since the transmission member can be assembled in a contact state while being urged, the transmission member can be assembled with relatively low accuracy, so that the processing cost can be reduced and the workability at the time of assembly can be improved.
[0035]
Further, since a pressing member that swings the contact plate according to the displacement of the cam surface due to the rotation of the cam member is interposed, the contact plate is pressed in the swingable direction of the contact plate, and the contact plate is slid by the sliding operation. Sliding friction and the like on the working surface can be avoided as compared with the case of swinging. Therefore, the life of the contact plate can be extended.
[0036]
According to the second aspect of the present invention, since the swing arm swings according to the cam surface of the cam member and presses the contact plate, the sliding member such as a conventional roller can be completely eliminated from the transmission member, and the sliding friction can be reduced. And the like can be avoided, and the operation becomes smooth, so that the operability of the lever switch can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a vehicle lever switch according to an embodiment of the present invention. FIG. 2 is a top view and a front view showing a pressing member of the vehicle lever switch according to the embodiment of the present invention. FIG. 4 is a front view and a right side view showing a cam member as a transmission member in the vehicle lever switch according to the embodiment of the invention. FIG. 4 is a top view and a rear view showing the vehicle lever switch according to the embodiment of the invention. FIG. 6 is a schematic view showing a positional relationship among an operating lever, a cam member, a pressing member, and a contact plate in a vehicle lever switch according to an embodiment of the present invention. FIG. 6 is a schematic view showing a conventional vehicle lever switch.
1: Lower body (lever switch body)
2. Upper body (lever switch body)
3. Operating lever 3b. Peripheral side surface 4. Cam member (transmission member)
4a cam surface 5 pressing member 5b swing arm 5ba abutting portion 5bb pressing portion 6 contact plate 6a movable contact 7 swing shaft 8 torsion coil spring 9 rotating shaft 10 swing shaft 11 ... fixed contact 12 ... uneven part

Claims (2)

A lever switch body having a movable contact and a fixed contact,
An operating lever swingably mounted on a swing shaft formed on the lever switch body;
A transmission member for selectively performing contact and separation between the movable contact and the fixed contact with the swinging operation of the operation lever,
A vehicle lever switch comprising:
The transmission member is rotatably disposed on a rotation shaft formed in the lever switch main body, and has a plurality of cam surfaces for making contact and separation between the movable contact and the fixed contact. A part of the cam member is assembled in a state in which it is in contact with the peripheral side surface of the operation lever while being urged, and the movable contact is formed at a tip of a plurality of swingable contact plates. A plurality of contact surfaces that come into contact with and separate from the fixed contact by swinging of the contact plate, and are formed in a plurality corresponding to the respective cam surfaces of the cam member. A lever switch for a vehicle, wherein a pressing member for swinging the contact plate in response thereto is interposed. The pressing member has a swing arm that is swingable with respect to a swing shaft formed on the lever switch body, and is in contact with a cam surface of the cam member near a tip of the swing arm. The lever switch for a vehicle according to claim 1, wherein a contact portion and a pressing portion contacting each of the contact plates are formed.

Images