JPH0224351Y2 - - Google Patents

Description

[Detailed description of the invention] The invention is based on switches such as push button switches,
Or, when the steering wheel is rotated, the steering pad equipped with a display
In order to prevent the steering wheel from rotating with the steering wheel, making it difficult to operate switches or making it difficult to see the display, the steering column should be placed so that the steering pad remains stationary even when the steering wheel is rotated. The present invention relates to an improvement of a steering switch pad device equipped with a power transmission mechanism that interlocks the side and steering pad.

Conventional steering switch pad devices equipped with this type of power transmission device are shown in Figures 1 and 2.
The one shown in the figure is known.

This will be explained below.

The steering shaft 1 has a boss 3 fixed to the boss plate 2a of the steering wheel 2.
is fixed with a nut 4, and a pad base 7 of a steering pad 6, which is provided with a push button switch 5, a display, etc., is rotatably fitted onto the boss 3, and is prevented from coming off by a C ring 8.

On the steering column side, there are two or more fixing pins 9 with sloped tips 9a attached to pin holders 10.
The fixing pin 9 is biased toward the pad base 7 by a spring 11 installed between the fixing pin 9 and the pin holder 10.

The pad base 7 is provided with a recess 7a at a location facing the pin holder 10, and the tip of the fixing pin 9 is fitted into the recess 7a.This insertion prevents the steering pad 6 from rotating. ing.

The boss plate 2a rotates across the fixed pin 9, and when it hits the fixed pin 9, it pushes the slope 9a and makes it easier to push the fixed pin 9 into the pin holder 10. The part that comes into contact with is defined as a slope 2b.

Therefore, in the steering wheel 2, the boss plate 2a pushes the fixing pins 9 into the pin holder 10 so that the steering wheel 2 can be rotated across the pin holder 10, but the fixing pins 9 at two or more locations are Since one or more pads are fitted into the recesses 7a of the pad base 7, the steering pad 6 remains stationary and remains at a fixed position even when the steering wheel 2 is rotated.

In this way, the steering pad 6 remains stationary at a fixed position without rotating, but by rotating the steering wheel 2, each time the boss plate 2a crosses the fixed pin 9, the spring 11 The fixing pin 9 is attached to the padded base 7 with the force of
When this happens, a feeling of collision is transmitted and a sound is emitted at that time, and each time the slope 2b of the boss plate 2a hits the slope 9a of the fixed pin 9, the rotational load on the steering wheel 2 increases.

The present invention uses constant contact between the cam and the sliding pin instead of such intermittent contact to keep the load on the steering wheel constant during steering operations.

Then, a screw hole for screwing the extraction jig is drilled in the cam, the main screw of the extraction jig is used to push the tip of the steering shaft, and the extraction jig is moved in the direction away from the tip of the steering shaft. The power transmission mechanism that keeps the steering pad in an upright position can be removed by pulling the steering pad in an upright position, and applying excessive force to the steering wheel and pulling it out from the steering shaft may cause deformation of the steering wheel or damage to the power transmission mechanism. The purpose is to prevent such occurrences.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 8.

Note that the same reference numerals as in FIGS. 1 and 2 indicate the same members, and the description thereof will be omitted.

12 is a C ring 13,1 on the rear part 3a of the boss 3.
The base is fixed in the axial direction by 3' and is attached in a free state in the rotational direction, and a stopper 14 is rotatably fitted on the outer periphery of the base.

This stopper 14 has a notch 14c,
A leaf spring 15 having engaging bends 15a at both ends is attached, and the engaging bends 15a of the leaf spring 15 are engaged with the recesses 12a of the base 12.

Further, a holder hole 12b is bored in the base 12, and a spring 16 and an engagement pin 17 are accommodated in the holder hole 12b, and the engagement pin 17 is urged backward by the spring 16. The tip of the engagement pin 17 is fitted into the engagement recess 18a of the steering column body 18 that houses the lever combination switch, and since the steering column body 18 does not rotate, the base 12 does not rotate even if the boss 3 rotates. There's nothing to do.

The base 12 and the stopper 14 are located in the depression 1.
2a and the engagement bend 15a of the leaf spring 15 are engaged, so even if the steering wheel 2 is rotated, the stopper 14 will not rotate because the base 12 is in a non-rotating, stationary state. 14
If an attempt is made to forcefully rotate the stopper 14, the recess 12a and the engaging bend 15a will come off against the elasticity of the leaf spring 15, allowing the stopper 14 to rotate.

19 is fixed to the front part 3b of the boss 3 with a nut 20 and fixed in the axial direction by a cam plate 21.
This pin holder is mounted freely in the rotational direction, and consists of a ring-shaped boss part 19a and a thick part 19c in which an insertion hole 19b for inserting several sliding pins 22 is formed. A steering pad 6 on which switches, a display, etc. are installed can be attached to this.

The stopper 14 is provided with several engagement recesses 14a facing the insertion hole 19b, and the insertion hole 19b
The chamfered portion 22a at the tip of the sliding pin 22 inserted therein can engage therein.

The other end of the sliding pin 22 is provided with a tapered annular groove 22b, and the cam plate 21 has a tapered outer end 21a and a cam surface 21b made of synthetic resin. An annular groove 22b is fitted into this, and the sliding pin 22 is inserted into the cam surface 2.
It slides in the insertion hole 19b according to the shape of 1b.

This cam surface 21b is formed in such a shape that at least one of the several sliding pins 22 is always pushed to the maximum extent, and the adjacent sliding pin 22 is retreated after being pushed to the maximum extent. and sliding pin 2
2 is the sliding pin 22 when pushed in to the maximum extent.
The tip of the sliding pin 22 engages in the engagement depression 14a of the stopper 14, and the tip of the sliding pin 22 engages in the engagement depression 14a of the stopper 14.
The tip is chamfered 22a so as not to hit the edge when entering.

Furthermore, the outer end of the cam surface 21b is tapered 21a.
In addition, since the annular groove 22b of the sliding pin 22 is tapered, even on the inclined portion of the cam surface 21b on which the sliding pin 22 slides, the contact between the two does not become a point contact, and smooth operation can be performed. Moreover, since the cam surface 21b is made of synthetic resin, there is little sliding resistance between the two, and therefore the sliding pin 22
This ensures smooth operation of both parts and prevents abnormal wear of both parts.

A boss plate 2a of the steering wheel 2 is fixed to the boss 3, and an inner protrusion 21c of the cam plate 21 is fixed to the boss 3.
is inserted into the keyway and secured with a nut 20, so that when the steering wheel 2 is rotated, the boss 3 also rotates and the cam plate 21 also rotates.

However, some of the sliding pins 22 are located in the engagement recess 14a of the stopper 14 that does not rotate as described above.
Since the tip of the pin holder 19 is engaged, the pin holder 19 does not rotate, and a portion of the sliding pin 22 is retracted into the insertion hole 19b, so the boss plate 2a of the steering wheel 2 can pass through this portion and rotate. Become.

Then, the tapered portion 1 of the steering shaft 1
The inner diameter of the boss 3 meshes with the knurled portion 1b and is fastened to the steering shaft 1 with a nut 23, so that the steering shaft 1 and the boss 3 are integrated, and the rotation of the steering wheel 2 is transmitted to the steering shaft 1.

In addition, a cancel cam 25 is housed on the steering shaft 1 with a spring 24 interposed in the steering column body 18 that accommodates a direction indicating switch (not shown), and the cancel cam 25 is engaged with the boss 3 by the biasing force of the spring 24. When the steering wheel 2 is rotated in the reverse direction, the cancel cam 25 is operated to turn off the direction indicator lamp.

In this way, the base 12 that supports the stopper 14, the pin holder 19, and the cam plate 21 are attached to the boss 3, so that by loosening the nut 23, the mechanism for preventing these steering pads 6 from rotating and the steering wheel are removed. 2 can be removed together with the boss 3.

Therefore, when installing, after incorporating these mechanisms onto the boss 3 fixed to the steering wheel 2, the boss 3 is fitted onto the steering shaft 1, and the base 12 is rotated to engage the engagement pin 17 and the engagement recess 18a. The rotation of the base 12 can be stopped by aligning them and engaging them with the elasticity of the spring 16, and then tightening the nut 23 to complete the installation.

As described above, this mechanism is convenient because it can be removed and attached by attaching and detaching the boss 3, and it is also easy to disassemble and repair, and the engaging pin 17 and the engaging recess 18a can be easily engaged.

Furthermore, in this case, the taper portion 1a of the boss 3 is wedged into the steering shaft 1, making it difficult to remove, so the boss 3 can be easily removed using the removal jig described below. It's summery.

This extraction jig includes a jig body 101, a main screw 102 screwed into the center of the jig body 101, and a mounting screw 1 inserted into a hole 101a of the jig body 101.
03, and the cam plate 21 is provided with a screw hole 21d into which the mounting screw 103 is screwed.

To remove the boss 3 from the steering shaft 1 using this removal jig, insert the mounting screw 103 into the hole 101a of the jig main body 101 and remove the cam plate 2.
The jig main body 101 is attached to the cam plate 21 by screwing into the screw hole 21d of No. 1.

Then, the main screw 102 coincides with the steering shaft, so as the main screw 102 is tightened, the jig main body 101 is pushed away from the steering shaft 1, and the cam plate 21 is moved in the axial removal direction. Since the cam plate 21 is attached to the boss 3 with a nut 20, the boss 3 can be removed.

Further, an inner cavity 14b formed by the base 12 and the stopper 14, and an inner cavity 1 of the pin holder 19.
9d is formed sandwiching the boss plate 2a, and slip rings A and B, which will be described later, are accommodated in this.

The slip ring accommodated in the inner cavity 19d of the pin holder 19 and connecting the switches and display of the steering pad 6 to the corresponding circuit on the vehicle body side will be described below with reference to FIGS. 9 and 10.

The base portion 25 has an outer peripheral wall 25c for forming a space 25b for accommodating a lead plate 28a of a fixed contact 28, which will be described later, on the front surface of the flange base 25a, and an inner peripheral end of the through hole 26b of the movable cover 26 inside the outer peripheral wall 25c. A claw 25 that is relatively rotatably engaged with the
An inner circumferential wall 25d with d ₁ formed around the entire circumference of the tip is provided protrudingly. Incidentally, 25d ₂ is a slit for elastically engaging the pawl 25d ₁ .

Reference numeral 27 denotes a printed circuit board formed on the back surface of the flange base 25a of the base portion 25, to which the tip of the lead plate 28a of the fixed contact 28 led out from the space 25b is soldered.

Reference numeral 28 denotes a fixed contact formed approximately in a ring shape using a conductive material.
The current collector 30 is formed by arranging the current collectors alternately with ring-shaped spacers 29 made of an insulating material such as plastic and sequentially stacking them in the axial direction of the steering shaft 1.

On the inner periphery of each fixed contact 28, a lead plate 28 is bent in the direction of the flange base 25a.
a is formed, and the lead plates 28a are arranged at appropriate angles to prevent adjacent lead plates 28a from being short-circuited.

The current collector 30 is connected to the outer peripheral wall 25c of the base portion 25.
stored outside.

_25c1 are slits provided in the outer circumferential wall 25c of the base portion 25, corresponding to the lead plates 28a of the fixed contacts 28, and when the current collector 30 is assembled, the slits 25c1 are adjacent to each other within the respective slits _25c1 . The lead plates 28a of the fixed contacts 28 are respectively fitted, and the attachment position of the current collector 30 to the outer peripheral wall 25c is determined. In other words, the mounting angle is determined and no short circuit occurs.

Each lead plate 28a of the fixed contact 28
is led out from a lead-out hole (not shown) provided in the flange base 25c of the space 25b, reaches the back surface of the printed circuit board 27, is soldered there, and is connected to the connector 32 via the lead wire 31. be done.

Reference numeral 33 denotes a mounting plate for preventing the incorporated current collector 30 from coming off, and is attached to the outer peripheral wall 2.
A screw insertion hole 33a is provided at a position corresponding to the screw hole _25c3 of the rib _25c2 formed in the rib 5c, and a screw 34 is screwed into the screw insertion hole 33a and the screw hole _25c3 to attach it to the outer peripheral wall 25c. This prevents the current collector 30 from coming off.

The movable cover part 26 is attached to the fixed base part 2.
It is mounted on the outer peripheral wall 25c of No. 5 so as to be relatively rotatable.

Reference numeral 35 denotes a movable connector that elastically slides into contact with each fixed contact 28 of the fixed system, and each movable contact 35 is a fixed connector formed by bending both ends of a conductive spring material formed from a flat plate or a wire material. contact portions 35a, 35a with the contact 28;
It is formed with a bulging part 35b for insertion, which bulges outward at the center.

A fitting groove 26c in which the movable contact 35 is provided parallel to the axial direction on the side surface of the movable cover portion 26;
The protruding portion 35b of the movable contact 35 is fitted into the movable cover portion 26c, and the claw _25d1 formed on the entire circumference of the tip of the inner circumferential wall 25d of the base portion 25 is inserted into the movable cover portion 2.
6 is engaged with the inner circumferential end of the through hole 26b.

The lead wire 36 connects to the bulge 3 of the movable contact 35.
5b, the bundle is fixed by a band material 27d provided on the outer surface of the movable case portion 26, and a connector 37 is connected to the tip.

Incidentally, since the slip ring B accommodated in the inner cavity 14b formed by the base 12 and the stopper 14 is constructed in the same manner as the slip ring A,
The explanation will be omitted.

The connector 37 of the slip ring A in the pin holder 19 is connected to the base 12 and the connector 37 of the slip ring B in the stopper 14, and the connector 32 of the slip ring A in the pin holder 19 is connected to the switches of the steering pad 6. The connector of the lead wire 39 connected to the display is connected, and the connector of the lead wire 40 connected to the circuit on the vehicle body is inserted through the base 12 and the connector 32 of the slip ring B in the stopper 14. and then connected.

Now, when you rotate the steering wheel 2, the boss 3 also rotates, which rotates the steering shaft 1.
Although the direction of the vehicle can be changed, the base 12, stopper 14, and pin holder 19 are stationary as described above and hold the steering pad 6 in an upright position.

However, if the boss plate 2a and the sliding pin 22 come into contact with each other, or if the sliding pin 22 and the cam portion 21b of the cam plate 21 are rotated together with the boss plate 2a due to the cam part 21b of the cam plate 21, etc. As described above, when the base 12 and the stopper 14 are disengaged, the stopper 14 and pin holder 19 become rotatable, thereby preventing the boss plate 2a, that is, the steering wheel 2, from locking.

Then, the lead wire 4 connected to the circuit on the vehicle body side
0 is inserted through the base 12 which does not rotate even at this time, so the lead wire 40 will not be wound around and even if the stopper 14 and pin holder 19 rotate, the rotation of the steering wheel 2 will not be hindered.

As described in detail above, the present invention allows one of several movable members to be connected to the fixed member connected to the column side and the fixed member connected to the steering pad side.
The steering wheel can be rotated by engaging the parts by the rotation of the cam, and the boss plate of the steering wheel passes through the part where the movable parts are not engaged, and the steering pad can be rotated. When the steering wheel rotates, the cam and the movable member come into contact with each other, which means that the load remains constant regardless of the rotational position of the steering wheel.

Therefore, the steering operation can be performed smoothly and easily without the feeling of unsmooth operation due to fluctuations in the load applied to the steering wheel or the unpleasant feeling of impact.

The fixed member connected to the column side, the fixed member connected to the steering pad, the boss plate 2 of the steering wheel, and the cam that operates the movable member are prevented from coming off by nuts attached to the bosses. Therefore, by removing the boss from the steering shaft, the front part can be removed in its assembled state.

What's more, the cam has a screw hole for installing a removal jig, so you can attach the removal jig to this and remove the boss from the steering shaft, so you can pull the steering wheel strongly by hand. There is no need to remove the steering wheel, and it can be easily removed without bending the steering wheel or damaging any parts.

Furthermore, since the screw hole for attaching the extraction jig is provided in the cam that operates as described above, the number of parts can be reduced.

[Brief explanation of the drawing]

Figures 1 and 2 are a longitudinal sectional view and a cross sectional view of the main parts of a conventional steering switch pad device, Figures 3 to 10 are embodiments of the present invention, and Figure 3 is a longitudinal sectional view;
Fig. 4 is a front view of the cam plate, Fig. 5 is a front view of the base and stopper, Fig. 6 is a side view showing the state of contact between the cam plate and the sliding pin, and Fig. 7 is a sectional view of the main parts. , FIG. 8 is a sectional view showing how the extraction jig is used,
FIG. 9 is an exploded perspective view of the slip ring, and FIG. 10 is a perspective view thereof from the printed circuit board side. 1... Steering shaft, 2... Steering wheel, 3... Boss, 6... Steering pad, 12... Base, 14... Stopper, 1
9...Pin holder, 21...Cam plate, 21d...
Screw hole, 22...sliding pin.

Claims (1)

[Scope of claim for utility model registration] Nut 2 fitted to steering shaft 1
3, a steering wheel 2 fixed to the steering shaft 1 via the boss 3, and the boss 3 behind the steering wheel 2.
a stopper 14 that is fixed to the column body 18 and that is not movable in the axial direction but can be freely rotated in the rotational direction; and the stopper 14 and the steering wheel 2
A pin holder 19 is attached to the boss 3 so that it does not move in the axial direction but can be freely rotated in the rotational direction.
and a large number of insertion holes 1 formed in the pin holder 19.
a sliding pin 22 which is inserted into the pin holder 19 and whose tip end is selectively inserted into the engagement recess 14a formed in the stopper 14; and the boss 3 in front of the pin holder 19.
When the other end of the sliding pin 22 is engaged and rotated by the boss 3, the sliding pin 22
The cam plate 21 is provided with a cam plate 21 whose tip is inserted into the engagement recess 14a by sequentially sliding the cam plate 21, and a screw hole 21d is formed in the cam plate 21 to be screwed into the bolt 103 of the steering removal jig. Steering device removal mechanism in the steering switch pad device.