JP2011048925A - Lever switch - Google Patents

Abstract

A lever base capable of accurately detecting an unfitted state while simplifying an assembling operation.
A rotary chart 3 is rotated around an axis. The cylindrical lighting shaft 4 into which the rotating shaft 3 is inserted is fixed to the rotating shaft 3 by fitting a cantilever 41 with a cantilever structure provided on the side surface thereof into a fitting groove 31 provided on the rotating shaft 3. Is done. A rotating shaft 3 and a writing shaft 4 are rotatably inserted into the cylindrical lever base 2. An exposure hole 22b for exposing the claw portion 41 provided on the writing shaft 4 is provided on the side surface of the lever base 2 so that the claw portion 41 and the fitting groove 31 are not fitted, and the claw portion 41 is bent outward. When the rotating shaft 3 is rotated around the axis in the bent state, the claw portion 41 comes into contact with the inner wall of the exposure hole 22b so that the rotating shaft 3 cannot rotate.
[Selection] Figure 2

Description

  The present invention relates to a lever switch, for example, a lever switch for operating a light of a vehicle.

  Conventionally, a vehicle lever switch has been attached to a steering column or the like in order to operate various equipment such as a lighting device, a wiper device, and a direction indicator on a steering column. As shown in FIG. 7, the main lever switch 1 includes a lever base 2 having a base end portion attached to the steering column, a rotating shaft 3 attached to the lever base 2 so as to be rotatable around an axis, and a rotation. In order to restrict the movement of the shaft 3 in the axial direction, a cylindrical lighting shaft 4 (fixed portion) fixed to the base end portion of the rotating shaft is provided (for example, Patent Document 1).

  The lever base 2 is formed in a cylindrical shape having an opening on the right side of the drawing. An insertion hole 22a for inserting the writing shaft 4 is provided on the side surface of the lever base 2 on the base end side. The rotating shaft 3 is rotated around its axis by the driver's operation. The writing shaft 4 is provided in a cylindrical shape with both ends opened, and the rotating shaft 3 is inserted therein. Further, a claw portion 41 having a cantilever structure is provided on the side surface of the writing shaft 4, and the claw portion 41 is fitted into the fitting groove 31 provided in the rotary shaft 3, so that the writing shaft 4 is turned into the rotary shaft. 3 is fixed.

  Next, the assembly procedure of the lever switch 1 described above will be described. First, the writing shaft 4 is inserted into the lever base 2 by inserting the writing shaft 4 from an insertion hole 22 a provided on the lower side of the lever base 2 in the drawing. Thereafter, when the rotary shaft 3 is inserted from an opening provided on the right side of the lever base 2 in the drawing and the rotary shaft 3 is moved toward the base end of the lever base 2, the rotary shaft 3 is arranged in the lever base 2. Inserted into the writing shaft 4. Further, when the rotary shaft 3 is moved toward the base end portion of the lever base 2, the cantilever claw portion 41 provided on the side surface of the writing shaft 4 is fitted into the fitting groove 31 provided in the rotary shaft 3. Thus, the rotating shaft 3 is fixed to the writing shaft 4. The axial end surface of the lighting shaft 4 abuts against a restriction wall 23 provided on the lever base 2 to restrict the axial movement of the rotary shaft 3, thereby preventing the rotary shaft 3 from falling off the lever base 2.

  However, in the above-described lever switch 1, the claw portion 41 provided on the writing shaft 4 may be assembled in an unfitted state where it is not fitted in the fitting groove 31 provided on the rotating shaft 3. If the fitting shaft is not fitted as described above, the writing shaft 4 and the rotating shaft 3 are not fixed, and the rotating shaft 3 may fall off the writing shaft 4 and the lever base 2. Therefore, at the time of assembling, a tensile inspection is performed in which the rotating shaft 3 is pulled to detect unfitting. For this reason, there existed a problem that an assembly operation became complicated. In addition, there is a problem that there is a difference in the pulling force of the operator, and unfitting cannot be detected accurately.

JP 2001-76593 A

  Then, this invention makes it a subject to provide the lever base which can detect a non-fitting correctly, aiming at simplification of an assembly operation.

  The invention described in claim 1 for solving the above-described problem is a rotating shaft that is rotated around an axis, and a cylindrical fixing portion into which the rotating shaft is inserted, and is cantilevered on a side surface thereof. A fixing portion fixed to the rotating shaft by fitting a claw portion of the structure in a fitting groove provided in the rotating shaft, and a cylindrical lever into which the rotating shaft and the fixing portion are rotatably inserted In the lever switch including the base, an exposure hole for exposing the claw portion provided in the fixing portion is provided on a side surface of the lever base, and the claw portion and the fitting groove are not fitted. The lever switch is provided so that the claw portion is in contact with the inner wall of the exposure hole when the rotating shaft is rotated around the axis in a state so that the rotating shaft cannot rotate.

  According to a second aspect of the present invention, the lever base includes a first tube portion into which a portion not covered by the fixed portion of the rotating shaft is inserted, and a second tube portion into which the fixed portion is inserted. It is provided, It is provided so that the value which added the outer diameter of the said fixing | fixed part and the engagement allowance of the said nail | claw part may become larger than the internal diameter of a said 2nd cylinder part. Lever switch.

  As described above, according to the first and second aspects of the invention, since the rotating shaft cannot be rotated around the axis in the unfitted state, the unfitting is detected by checking the rotating operation of the rotating shaft. Therefore, the assembling work can be simplified. Further, since the rotating shaft cannot be rotated around the axis in the unfitted state, the unfitted state can be accurately detected.

(A) is a side view which shows one Embodiment of the lever switch of this invention, (B) is a P arrow view of the lever switch shown to (A). It is the II sectional view taken on the line of FIG. It is the II-II sectional view taken on the line of FIG. (A) is an enlarged view of the III part of FIG. 2 at the time of fitting, (B) is an enlarged view of the III part of FIG. 2 at the time of non-fitting. It is a fragmentary perspective view of the lever switch shown in FIG. It is the IV-IV sectional view taken on the line of FIG. It is a fragmentary sectional view showing an example of the conventional lever switch.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. As shown in FIG. 2 and the like, the lever switch 1 includes a lever base 2 whose base end is attached to the steering column, a rotary shaft 3 attached to the lever base 2 so as to be rotatable about an axis, and a rotary shaft 3. Lighting shaft 4 as a cylindrical fixing portion fixed to the base end portion of rotating shaft 3 so as not to fall out of lever base 2, lever base knob 5 and center base knob attached to lever base 2 6, a light knob 7 attached to the rotary shaft 3, a shaft lock 8, a knob cap 9, a spring 10 and a steel ball 11 (see FIG. 3) provided between the center base knob 6 and the light knob 7. It has.

  The lever base 2 described above is formed in a cylindrical shape having an opening on the side away from the base end (right side of the drawing) as shown in FIGS. 2, 6, etc., and covers the lighting shaft 4 of the rotating shaft 3. The first cylindrical portion 21 into which the uncut portion is inserted, the second cylindrical portion 22 into which the writing shaft 4 is inserted, and the axial end surface of the writing shaft 4 are brought into contact with each other to cause the axial movement of the rotating shaft 3. And a regulating wall 23 for regulating.

  The first cylindrical portion 21 and the second cylindrical portion 22 have cylindrical holes formed in a circular cross section so that the rotary shaft 3 and the writing shaft 4 can rotate around the axis inside. As shown in FIG. 6 and the like, the second cylindrical portion 22 is provided with an insertion hole 22a for inserting the writing shaft 4 on the side surface thereof. The writing shaft 4 is inserted into the insertion hole 22 a and is disposed in the second cylindrical portion 22 of the lever base 2. Further, the second cylinder portion 22 is provided with an exposure hole 22b on the side surface thereof for exposing a claw portion 41 described later provided on the writing shaft 4. The lock of the claw portion 41 described later can be released by the exposure hole 22b.

  The rotating shaft 3 is rotated around an axis by a driver's operation. Further, as shown in FIG. 6 and the like, the rotating shaft 3 is provided in a D-shaped cross section in which a part of a circular shape is cut out. Further, as shown in FIG. 4 and the like, the rotary shaft 3 is provided with a fitting groove 31 into which a claw portion 41 of the writing shaft 4 described later is fitted.

  The writing shaft 4 is provided in a cylindrical shape with both ends opened, and the proximal end portion of the rotating shaft 3 is inserted. As shown in FIG. 6, the cylindrical hole of the writing shaft 4 is provided with a D-shaped cross section like the rotary shaft 3. As a result, the rotating shaft 3 does not rotate within the lighting shaft 4, and when the rotating shaft 3 rotates around the axis, the writing shaft 4 also rotates around the axis.

  Further, as shown in FIG. 4 and the like, the writing shaft 4 is provided with a claw portion 41 that is fitted into the fitting groove 31 of the rotating shaft 3 described above. The claw portion 41 is provided in a cantilever structure in which one end is a free end and the other end is connected to the side surface of the writing shaft 4. One end of the claw portion 41 protrudes into the cylinder of the writing shaft 4 and is flexible in the cylinder radial direction. When the claw portion 41 is fitted into the fitting groove 31 of the rotating shaft 3, the rotating shaft 3 is fixed so as not to fall out of the writing shaft 4.

  Further, the lighting shaft 4 has a value obtained by adding the outer diameter R1 (FIG. 6) and the engagement allowance L (FIG. 4) of the claw portion 41 larger than the inner diameter R2 (FIG. 6) of the second cylindrical portion 22. It is provided to become. As shown in FIG. 4B, the engagement allowance L of the claw portion 41 is that the claw portion 41 and the fitting groove 31 are not fitted, and the claw portion 41 is bent outward by the rotating shaft 3. The difference of the position of the radial direction of the nail | claw part 41 is shown when the nail | claw part 41 and the fitting groove | channel 31 are fitting. As a result, as shown in FIG. 4B, when the claw portion 41 and the fitting groove 31 are not fitted, the claw portion 41 is bent outward by the rotary shaft 3. When the shaft is rotated around the axis, the claw portion 41 comes into contact with the inner wall 22a-1 of the exposure hole 22b so that the rotating shaft 3 cannot rotate.

  Further, an operating rod 42 protruding from the insertion hole 22 a of the lever base 2 is provided on the outer surface of the writing shaft 4. The operation lever 42 is engaged with a switch operating portion of a light switch (not shown). When the rotary shaft 3 rotates around the axis, the operating rod 42 also rotates around the axis, and the switch operating portion engaged with the operating rod 42 is operated or the operation is stopped.

  As shown in FIG. 2 and the like, the lever base knob 5 is integrally formed with an outer cylinder portion 51 serving as an exterior and an inner cylinder portion 52 provided in the outer cylinder portion 51. The inner cylinder portion 52 has the lever base 2 inserted therein, and a locking projection 52a that protrudes inward is provided on the inner side surface thereof. By inserting the locking projection 52 a into the locking groove 24 provided in the lever base 2, the locking projection 52 a and the locking groove 24 are locked and the lever base knob 5 is fixed to the lever base 2.

  The center base knob 6 is attached to the lever base 2 on the side farther from the base end than the lever base knob 5. As shown in FIG. 3 and the like, the center base knob 6 includes an outer cylinder portion 61 as an exterior, an inner cylinder portion 62 provided in the outer cylinder portion 61, and the outer cylinder portion 61 and the inner cylinder portion 62. A spring 10 and a support portion 63 for supporting the steel ball 11 provided between them are formed integrally. The inner cylinder portion 62 has the lever base 2 inserted therein, and a locking projection 62a that protrudes inward is provided on the inner side surface thereof. By inserting the locking projection 62 a into the locking groove 25 provided in the lever base 2, the locking projection 62 a and the locking groove 25 are locked and the center base knob 6 is fixed to the lever base 2.

  The light knob 7 is attached to the rotary shaft 3 on the side farther from the base end than the center base 6. As shown in FIG. 3 and the like, the light knob 7 includes an outer cylinder portion 71 as an exterior, an inner cylinder portion 72 provided in the outer cylinder portion 71, and between the outer cylinder portion 71 and the inner cylinder portion 72. A provided spring 73 and a support portion 73 for supporting the steel ball 11 to be described later are integrally formed. The inner cylinder portion 72 is inserted with a portion of the rotating shaft 3 that is not covered by the lever base 2. The cylindrical hole of the inner cylindrical portion 72 is provided in a D-shaped cross section like the rotary shaft 3. Thereby, the rotation shaft 3 does not rotate in the inner cylinder part 72, and when the light knob 7 rotates around the axis, the rotation shaft 3 also rotates around the axis.

  The shaft lock 8 is fixed to an end portion on the side away from the base end portion of the rotating shaft 3 so that the rotating shaft 3 does not fall off the lever base 2. The shaft lock 8 is disposed in the outer cylindrical portion 71 of the light knob 7 as shown in FIG. The shaft lock 8 is provided in a cylindrical shape with both ends opened, and the rotating shaft 3 is inserted therein. The cylindrical hole of the shaft lock 8 is provided in a D-shaped cross section like the rotary shaft 3. Thereby, the rotating shaft 3 does not rotate in the shaft lock 8, and when the rotating shaft 3 rotates around the axis, the shaft lock 8 also rotates around the axis.

  Further, as shown in FIG. 2 and the like, the shaft lock 8 is provided with a claw portion 81 fitted into the fitting groove 32 of the rotating shaft 3 described above. The claw portion 81 has a cantilever structure in which one end is a free end and the other end is connected to a side surface of the shaft lock 8. One end of the claw portion 81 protrudes into the cylinder of the shaft lock 8 and is flexible in the cylinder radial direction. When the claw portion 81 is fitted into the fitting groove 33 of the rotating shaft 3, the rotating shaft 3 is fixed so as not to fall off from the shaft lock 8.

  The knob cap 9 is provided in a cylindrical shape with an opening on the base end side only, and is attached to the light knob 7 so as to close the opening on the side away from the base end of the light knob 7. Specifically, as shown in FIG. 3, the locking projections 74 provided on the light knob 7 are inserted into the locking holes 91 provided on the outer surface of the knob cap 9 so that the locking holes 91 and the locking projections 74 are engaged. The light knob 7 and the knob cap 9 are fixed. When the knob cap 9 is attached to the light knob 7, the shaft lock 8 is sandwiched between the inner cylindrical portion 72 of the light knob 7 and the knob cap 9 as shown in FIG. 2. As a result, the axial movement of the shaft lock 8 is restricted so that the rotary shaft 3 does not fall out of the lever base 2.

  Further, as shown in FIG. 3, the spring 10 and the steel ball 11 are sandwiched and supported between a support portion 63 of the center base knob 6 and a support portion 73 of the light knob 7. The light knob 7 is smoothly rotated with respect to the center base knob 6 by the spring 10 and the steel ball 11.

  Next, the assembly procedure of the lever switch 1 described above will be described. First, the writing shaft 4 is inserted into the lever base 2 by inserting the writing shaft 4 from an insertion hole 22 a provided on the lower side of the lever base 2 in the drawing. At this time, the writing shaft 4 is disposed in the lever base 2 so that the claw portion 41 is exposed from the exposure hole 22b and the operation rod 42 protrudes from the insertion hole 22a. Thereafter, when the rotary shaft 3 is inserted from an opening provided on the side away from the base end portion of the lever base 2 and the rotary shaft 3 is moved toward the base end portion of the lever base 2, the rotary shaft 3 is moved to the lever base. 2 is inserted into the writing shaft 4 arranged in the body 2. When the rotating shaft 3 is inserted into the writing shaft 4, the claw portion 41 is bent outward by the rotating shaft 3 as shown in FIG.

  Further, when the rotary shaft 3 is moved toward the base end portion of the lever base 2 and the claw portion 41 reaches the fitting groove 31, the claw portion 41 is directed inward as shown in FIG. It is restored and fitted into the fitting groove 31. Thereby, the rotating shaft 3 is fixed to the writing shaft 4. The axial end of the lighting shaft 4 abuts against a restriction wall 23 provided on the lever base 2 to restrict the axial movement of the rotary shaft 3 and prevent the rotary shaft 3 from falling off the lever base 2.

  Thereafter, the assembly operator confirms whether the claw portion 41 provided on the side surface of the writing shaft 4 is fitted in the fitting groove 31 provided in the rotating shaft 3 and confirms the operation of the rotating shaft 3. Then, the rotary shaft 3 is rotated around the axis. If the fitting groove 31 and the claw portion 41 are fitted as shown in FIG. 4A, the claw portion 41 rotates the rotating shaft 3 without coming into contact with the inner wall 22a-1 of the exposure hole 22b. Can do. On the other hand, as shown in FIG. 4B, if the fitting groove 31 and the claw portion 41 are not fitted, the claw portion 41 is exposed through the exposure hole when the lighting shaft 4 rotates as the rotary shaft 3 rotates. The rotating shaft 3 cannot be rotated in contact with the inner wall 22a-1 of 22b.

  After the normal fitting and the operation of the rotating shaft 3 are confirmed, the lever base 2 is inserted into the inner cylindrical portion 52 of the lever base knob 5 and the lever base 2 is provided as shown in FIG. The lever base knob 5 is attached to the lever base 2 by locking the stop groove 24 and the locking protrusion 52 a provided on the inner cylinder portion 52. Further, as shown in FIG. 3 and the like, the inner cylindrical portion 62 of the center base knob 6 is inserted into the lever base 2, and the locking groove 25 provided in the lever base 2 and the locking projection 62 a provided in the inner cylindrical portion 62. And the center base knob 6 is attached to the lever base 2. Thereafter, the spring 10 and the steel ball 11 are mounted on the support portion 63 of the center base knob 6.

  Next, the rotary shaft 3 is inserted into the inner cylindrical portion 72 of the light knob 7, and the spring 10 and the steel ball 11 are sandwiched between the support portion 63 of the center base knob 6 and the support portion 73 of the light knob 7. Thereafter, the rotary shaft 3 is inserted into the shaft lock 8 and the claw portion 81 is fitted into the fitting groove 32, and then the knob cap 9 is attached to the light knob 7.

  According to the lever switch 1 described above, since the rotating shaft 3 cannot be rotated around the axis in an unfitted state, the unfitting can be detected by confirming the rotating operation of the rotating shaft 3, and the assembly work Can be simplified. Further, since the rotating shaft 3 cannot be rotated around the axis in the unfitted state, the unfitted state can be accurately detected.

  Further, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

2 Lever base 3 Rotating shaft 4 Lighting shaft (fixed part)
21 1st cylinder part 22 2nd cylinder part 22b Exposed hole 23 Restriction wall 41 Claw part

Claims (2)

A rotating shaft that is rotated around an axis;
A cylindrical fixing portion into which the rotating shaft is inserted, and is fixed to the rotating shaft by fitting a claw portion of a cantilever structure provided on a side surface thereof into a fitting groove provided in the rotating shaft. A fixed part,
A cylindrical lever base into which the rotating shaft and the fixed portion are rotatably inserted;
In the lever switch with
An exposure hole that exposes the claw portion provided in the fixed portion is provided on a side surface of the lever base,
When the rotary shaft is rotated around the axis when the claw portion and the fitting groove are not fitted, the claw portion comes into contact with the inner wall of the exposure hole so that the rotary shaft cannot rotate. A lever switch characterized by The lever base is provided with a first tube portion into which a portion of the rotating shaft not covered by the fixed portion is inserted, and a second tube portion into which the fixed portion is inserted,
2. The lever switch according to claim 1, wherein a value obtained by adding the outer diameter of the fixed portion and the engagement allowance of the claw portion is provided to be larger than the inner diameter of the second cylindrical portion. .

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