JPH0748420Y2 - Knob fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention is designed to fix the knob to the shaft portion by relatively inserting the tip of the shaft portion into the insertion hole of the knob. And a fixing device for the knob.

2. Description of the Related Art Some lever switch devices for automobiles include a shaft portion for operating a switch, which is rotatably inserted in a lever, and an operating knob attached to a tip portion of the shaft portion. To fix the knob to the shaft in this switch device, insert the insertion hole of the knob into the tip of the shaft, make a hole through the side surface of the knob and the shaft, and attach the fixing pin to this hole. Press fit.

(Problems to be Solved by the Invention) In the above-mentioned configuration, when fixing the knob, it is necessary to make a hole in the knob and the shaft portion and press-fit a fixing pin into the hole, which causes a problem of poor workability.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a knob fixing device that can be easily assembled and can improve workability.

[Structure of the Invention] (Means for Solving the Problems) A fixing device for a knob according to the present invention is one in which a tip end portion of a shaft portion is relatively inserted into an insertion hole of the knob, and the insertion hole is provided in the knob. An engagement portion having a tapered introduction portion is provided inside and a tip end portion of the shaft portion has a slotted fitting groove portion that is fitted to the outside of the engagement portion at the time of the relative insertion. An engaging claw portion that is provided, is elastically deformed by the introduction portion of the engaging portion at the time of the relative insertion, and passes through the engaging portion to engage with the base end portion of the engaging portion. It is characterized in that it is provided so as to project into the fitting groove portion.

(Operation) In the knob fixing device of the present invention, when the tip of the shaft portion is relatively inserted into the insertion hole of the knob, the engaging claw portion of the tip portion of the shaft portion is located in the insertion hole. Of the engaging portion while being elastically deformed and passing through the engaging portion, and thereafter, the fitting groove portion is fitted to the outside of the engaging portion and the engaging claw portion is provided at the base end portion of the engaging portion. Since they are engaged, the knob and the shaft can be easily assembled.

(Embodiment) An embodiment in which the present invention is applied to an automobile lever switch device will be described below with reference to the drawings.

First, in FIG. 5, reference numeral 1 is a lever base attached to the upper end of a steering pipe (not shown), and a steering shaft (not shown) is inserted through a cylindrical portion 2 at the center thereof. Reference numeral 3 denotes a lighting switch which is a switch arranged on the lever base 1. The lighting switch 3 is a base portion 5 on which a plurality of fixed contacts 4 (only one is shown) are arranged, and a contact slidingly contacting the upper surface portion of the base portion 5. The holder 6 and the movable contact 7 arranged on the contact holder 6 are biased by the spring 8 to come into contact with the fixed contact 4. Reference numeral 9 denotes a bracket, which is rotatably supported by a shaft portion 10 provided upright on the lever base 1. 11 is a lever (for example, a turn signal lever), and a pin 12 protruding from the base of the lever is a bracket 9
It is supported by a hole 13 formed in the above and is rotatable in the vertical direction. The lever 11 is made of synthetic resin (for example, ABS) in a tubular shape, and a shaft 14 made of synthetic resin (for example, PA-G), which is a shaft portion, is fitted into the lever 11 so that the shaft 14 can be moved. It is made rotatable about its axis. Reference numeral 15 is a rotary rod attached to the base end portion of the shaft 14, and a manipulator 15a projecting at a position eccentric to the axis line is a bifurcated engaging portion that is erected on the upper surface of the contact holder 6.
The contact holder 6 is engaged with the shaft 6a and slides the contact holder 6 in accordance with the rotation of the shaft 14. in this case,
The contact holder slides sequentially from the off position to the small light position and the headlight position in response to the rotation of the shaft 14 in a predetermined direction, and the movable contact 7 is switched between the fixed contact 4 and the fixed contact 4 at each position. It has become.

Now, as shown in FIGS. 1 and 2 (a) and (b), a slotted fitting groove 16 is formed at the tip of the shaft 14 so as to pass through the axis thereof, and the remaining The part is the elastically deformable arm part 17, 17, and this arm part 1
Engaging claws 17a, 17a projecting in a slanting shape into the fitting groove 16 are formed at the tips of the 7, 7. Then, on the outer peripheral portion of the shaft 14, the rotation preventing recesses 18, 1 are formed so as to be continuous with the fitting groove portion 16.
8 are formed {see FIGS. 2 (a) and 2 (b)}. Next, in FIGS. 3A to 3C, reference numeral 19 is a synthetic resin (for example, ABS) knob (for example, a light knob), and an insertion hole 20 is formed at the center thereof. An engaging portion 21 is formed at the center of 20 so as to connect the upper and lower sides. In this engaging portion 21, a tapered introduction portion 21a is formed at the distal end portion on the inlet side of the insertion hole 20, and a concave locking portion 21b is formed at the base end portion on the opposite side. Reference numerals 22, 22 denote anti-rotation protrusions which are provided continuously to the engagement portion 21 on the inlet side of the insertion hole 20, and when the knob 19 is relatively inserted into the shaft 14, the anti-rotation depressions 18, Mate to 18. 23 and 23 are insertion holes 20
The space for escape of the arm portions 17, 17 formed on the corresponding both side portions of the reference numeral 24 is a hole formed from the side surface portion of the knob 19 toward the center portion, and the side surface portion is engaged with the engaging portion 21. It is on the same plane as the part 21b. Reference numeral 25 denotes a moderation mechanism provided between the lever 11 and the pivot rod 15 of the shaft 14, which includes a moderation concavo-convex portion 26 formed on the pivot rod 15 and a housing formed on the lever 11. The recess 27 and the spring 28 housed in the storage recess 27
And a moderation pressure contactor 29, and the moderation pressure contactor 29 is brought into pressure contact engagement with the moderation uneven portion 26 by the spring force of the spring 28. Then, when the shaft 14 is rotated in the predetermined direction as described above, the rotation rod 15 is also integrally rotated to change the position of the moderation concave-convex portion 27 that engages with the moderation pressure contact 29. Thus, the rotation of the shaft 14 is given a moderation feeling, and the shaft 14 is positioned at the off position, the small light position and the headlight position, respectively.

Then, when the tip of the shaft 14 is relatively inserted into the insertion hole 20 of the knob 19, the tip of the engaging claws 17a, 17a is engaged with the engaging portion 2.
The first contact portion 21a comes into contact with the introduction portion 21a so as to follow the tapered portion thereof, and the arm portions 17, 17 are elastically expanded and deformed to retract into the space portions 23, 23 on both sides to pass the engagement portion 21. afterwards,
The arms 17 and 17 are elastically restored and the fitting groove 16 is fitted to the outside of the engaging portion 21, the engaging claws 17a and 17a are locked to the locking portion 21b, and the knob 19 is fixed to the shaft 14. It is installed so that it cannot be pulled out. In this case, when the shaft 14 and the knob 19 are inserted relative to each other, the rotation preventing protrusions 22, 22 become the rotation preventing concave portions 18, 22 of the shaft 14.
Fitted in 18. Therefore, when the knob 19 is rotated in a predetermined direction, the shaft 14 is fitted by fitting the engagement portion 21 and the fitting groove portion 16 and fitting the rotation preventing convex portion 22 and the rotation preventing concave portion 18.
Will also rotate in the same direction.

When removing the knob 19 from the shaft 14, as shown in FIG. 4 (a), the jig 30 is inserted into the hole 24 and the taper portion 30a at the tip is inserted between the engaging claw portions 17a, 17a. While inserting and pushing them apart, as shown in FIG. 4 (b), the arm 1
7 and 17 are located in the space portions 23 and 23 to release the engagement of the engagement claw portions 17a and 17a with the engagement portion 21b. Therefore, the knob 19 may be pulled out in the direction of arrow A.

According to the above embodiment, the following effects can be obtained. That is, by simply inserting the tip of the shaft 14 into the insertion hole 20 of the knob 19, the fitting groove 16 of the shaft 14 fits into the outside of the engaging portion 21, and the engaging claw 17a engages with the engaging portion. Since the knob 19 is locked to the shaft 21b and cannot be pulled out of the shaft 14, the assembly work can be significantly simplified, unlike the conventional method in which a pin was press-fitted by making a hole in the knob and shaft. Can be improved. In particular, since the moderation mechanism 25 is provided between the lever 11 and the rotating rod 15 of the shaft 14, when performing work for punching holes in the lever and shaft and press-fitting pins in the holes as in the conventional case. Requires a special jig to hold the moderation mechanism in a disassembled state, but in the present embodiment, as described above, it is only necessary to insert the knob 19 relatively to the shaft 14, It is not necessary to use a special jig to hold the moderating mechanism 25. Further, if the lever and the shaft are perforated as in the conventional case, chips are generated, so that a chip removing operation is required, but this is not necessary in this embodiment.

[Advantages of the Invention] In the knob fixing device of the present invention, the knob is provided with an engaging portion located in the insertion hole and having a tapered introduction portion at the tip, and the knob is inserted into the tip of the shaft portion at the time of relative insertion. A slot-like fitting groove portion that fits outside the engaging portion is provided, and the engaging portion is passed while being elastically deformed by the introducing portion of the engaging portion at the time of the relative insertion at the tip end portion of the shaft portion. Since the engaging claw portion that engages with the end portion of the engaging portion is provided, there is an effect that assembling can be facilitated and workability can be improved.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an enlarged cross-sectional view of a main part, FIG. 2 (a) is a plan view of a shaft, and FIG.
FIG. 3 (b) is the same side view, FIG. 3 (a) is a plan view of the knob, FIG. 3 (b) is the same longitudinal sectional view, FIG. 3 (c) is the same side view, and FIG. 4 (a). Is a perspective view for explaining the case of removing the knob, FIG. 4 (b) is a cross-sectional view of the same part, and FIG. In the figure, 11 is a lever, 14 is a shaft (shaft portion), 16 is a fitting groove portion, 17 is an arm portion, 17a is an engaging claw portion, 19 is a knob, 20 is an insertion hole, 21 is an engaging portion, and 21a is Introducing part, 21b shows a locking part (base end part).

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A distal end portion of a shaft portion is relatively inserted into an insertion hole of a knob, wherein the knob is provided inside the insertion hole and has a tapered introduction portion at the distal end portion. A mating portion, and a slotted fitting groove portion that is provided at the tip portion of the shaft portion and is fitted into the outer side of the engaging portion at the time of the relative insertion,
It is provided at the tip of the shaft portion so as to project into the fitting groove portion, and is passed through the engaging portion while being elastically deformed by the introducing portion of the engaging portion at the time of the relative insertion, and is passed to the end portion of the engaging portion. A fixing device for a knob, comprising: an engaging claw portion that engages.