JP6103294B2 - Steering column device - Google Patents

Description

  The present invention relates to a steering column device.

  In a steering device capable of adjusting the tilt position of the steering wheel, a steering device that eliminates backlash in the left-right direction (axial direction of the tightening rod) of clamp parts around the tightening rod by a spring that biases the steering column upward. Has been proposed (see, for example, Patent Document 1).

JP 2008-18803 A

In the example of FIGS. 2 to 4 of Patent Document 1, the vicinity of the base end portion of the operating lever that is the attachment position to the tightening rod is urged by the spring in the axial direction of the tightening rod.
On the other hand, as a rule, the long operation lever that is supported in a cantilevered manner by the tightening rod is easy to cause vibration, especially when the telescopic operation is performed after the lock is released, with the scratches on the sliding portion as a vibration source, With the spring configured as described above, the effect of suppressing vibration generated in the operation lever is weak. When the operation lever vibrates, the vibration is easily transmitted to the entire steering column device, and may be transmitted to the driver via the steering wheel.

On the other hand, when the spring is associated with the operation lever, if the set length of the spring changes depending on the tilt position, the urging force in the locking direction of the operation lever may change. When the variation in the urging force depending on the tilt position is large, a difference is caused in the vibration countermeasure effect, and the effect is reduced as a whole.
An object of the present invention is a steering column device that can suppress vibration of an operation lever during telescopic operation after unlocking and can maintain a constant biasing force in the locking direction of the operation lever regardless of the tilt position. Is to provide.

In order to achieve the above object, the invention of claim 1 includes at least a fixed side plate (20) fixed to a vehicle body side member (22) and a movable side plate (36) along the fixed side plate, and supports tilt support during tilt adjustment. A tilt member (TM) that is displaced in the tilt direction (Y) about the axis (18), a long slot for tilt (30) provided in the fixed side plate, and an insertion hole (39) provided in the movable side plate A lock shaft (25) that is inserted therethrough, an operation lever (26) that is rotated around a central axis (C1) of the lock shaft, and the fixed side plate and the movable side plate are pressed against each other as the operation lever rotates. And a urging member (34; 34A) that urges the operation lever in a locking direction (R1; R1A) around the central axis of the lock shaft at least when the lock is released. )When, The biasing member includes a first end portion (341) engaged with the tilt member and a second end portion (342) engaged with the operation lever at a position separated from a central axis of the operation lever. ) and, only including, during tilt adjustment in the unlocked state, the by the length between the first end and the second end portion is kept constant, the biasing force of the lock direction with respect to the operating lever The steering column device (1; 1A) is configured to be maintained constant .

In addition, although the alphanumeric character in a parenthesis represents the corresponding component etc. in embodiment mentioned later, this does not mean that this invention should be limited to those embodiment as a matter of course. The same applies hereinafter.
The urging member may be a tension coil spring.
Further, as in claim 3, a convex portion (32) provided on the movable side plate and included in the tilt member, a guide hole (33) provided on the fixed side plate and guiding the convex portion during tilt adjustment, The first end portion of the biasing member may be engaged with the convex portion.

  According to the first aspect of the invention, when the lock is released, the operation lever is urged in the locking direction by the urging member. Accordingly, it is possible to suppress the play of the cam mechanism of the lock mechanism during the telescopic operation after unlocking and suppress the vibration of the operation lever. Therefore, the vibration of the entire steering column device can be suppressed, and the driver can be prevented from experiencing the vibration through the steering member. In particular, even if the position of the tilt member is changed by tilt adjustment, the first end of the biasing member moves along with the tilt member, so that the set length of the biasing member is kept constant, and the biasing member is locked. The urging force in the direction can be kept constant. As a result, the urging force of the operation lever in the locking direction can be kept constant regardless of the position change of the tilt member by the tilt adjustment.

According to the invention of claim 2, the operating lever can be easily urged in the locking direction by the tension coil spring as the urging member.
According to the invention of claim 3, since the guide convex portion provided on the movable side plate is used for engaging the first end portion of the biasing member, the first end portion is engaged separately from the convex portion. The structure can be simplified as compared with the case where the combination element is provided.

It is a mimetic diagram of a schematic structure of a steering column device of one embodiment of the present invention. FIG. 2 is a schematic side view of the steering column device in a locked state, with the axial direction of the steering shaft being shown horizontally. It is a schematic sectional drawing of a steering column apparatus, Comprising: It corresponds to sectional drawing which follows the III-III line of FIG. It is a general | schematic expanded sectional view of the principal part of a steering column apparatus, Comprising: It corresponds to the figure which expanded a part of FIG. FIG. 2 is a schematic side view of the steering column device in an unlocked state, with the axial direction of the steering shaft being shown horizontally. FIG. 6 is a schematic side view of the steering column device in an unlocked state, and shows a state in which the tilt is adjusted upward from the state of FIG. 5 with the axial direction of the steering shaft being horizontal. It is a schematic side view of the steering column apparatus of another embodiment of this invention, and has shown the axial direction of the steering shaft horizontal.

Preferred embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a schematic configuration of a steering column device according to an embodiment of the present invention. Referring to FIG. 1, a steering column device 1 includes a steering member 2 such as a steering wheel, a steering mechanism 3 that steers steered wheels (not shown) in conjunction with steering of the steering member 2, and a steering shaft. 4 and a substantially cylindrical column jacket 5 are mainly included. For example, a rack and pinion mechanism is used as the steering mechanism 3.

  The steering member 2 and the steering mechanism 3 are mechanically connected via a steering shaft 4, an intermediate shaft 6, and the like. The rotation of the steering member 2 is transmitted to the steering mechanism 3 via the steering shaft 4, the intermediate shaft 6, and the like. The rotation transmitted to the steering mechanism 3 is converted into an axial movement of a rack shaft (not shown). Thereby, a steered wheel is steered.

  The steering shaft 4 has an upper shaft 7 and a lower shaft 8 that are fitted so as to be relatively slidable in the axial direction X. In the present embodiment, the upper shaft 7 has a cylindrical shape, and a portion of the lower shaft 8 in the axial direction X is inserted in a lower portion of the upper shaft 7 in the axial direction X (see also FIG. 2 described later). The upper shaft 7 and the lower shaft 8 are, for example, spline fitted or serrated fitted.

  The steering member 2 is attached to the upper end of the upper shaft 7 in the axial direction X (corresponding to one end of the steering shaft 4). Further, the steering shaft 4 can expand and contract along the axial direction X by the relative sliding of the upper shaft 7 and the lower shaft 8. In the steering shaft 4, the upper shaft 7 actually moves. The steering shaft 4 is accommodated coaxially in the column jacket 5 and is rotatably supported by the column jacket 5 via a plurality of bearings 9 and 10.

  The column jacket 5 includes a cylindrical inner jacket 11 that is an upper jacket, and an outer jacket 12 that is a lower jacket that supports the inner jacket 11 so as to be movable in the axial direction X. The outer jacket 12 includes a lower cylindrical portion 13 in the axial direction X and an upper groove portion 14 in the axial direction X. The cylindrical portion 13 surrounds at least the lower end portion in the axial direction X of the inner jacket 11. The inner jacket 11 has a smaller diameter than the cylindrical portion 13 of the outer jacket 12 and protrudes upward in the axial direction X from the cylindrical portion 13 of the outer jacket 12.

The inner jacket 11 rotatably supports the upper shaft 7 via a bearing 9 at one end (the upper end in the axial direction X). The inner jacket 11 is connected to the upper shaft 7 via a bearing 9 and can move integrally with the upper shaft 7.
The outer jacket 12 rotatably supports the lower shaft 8 via a bearing 10 at one end (the lower end in the axial direction X). A lower column bracket 15 extending upward is fixed to the outer periphery of the lower part of the inner jacket 11 in the axial direction X. The lower column bracket 15 is rotatably supported via a tilt support shaft 18 by a lower fixing bracket 17 fixed to the vehicle body side member 16.

  The column jacket 5 and the steering shaft 4 are rotated in the tilt direction Y around the tilt support shaft 18 so that the position of the steering member 2 is adjusted around the tilt support shaft 18 (tilt adjustment). Further, by adjusting the amount of expansion / contraction of the column jacket 5 and the steering shaft 4, the position of the steering member 2 is adjusted in the axial direction X (corresponding to the telescopic direction) (telescopic adjustment).

  An upper fixing bracket 21 having a fixed top plate 19 and a fixed side plate 20 extending from the fixed top plate 19 is fixed to the vehicle body side member 22. Specifically, the fixed top plate 19 is fixed to the vehicle body side member 22 via a fixing member such as a bolt (not shown). On the other hand, a movable bracket 23 is fixed to the inner jacket 11. The steering column device 1 includes a lock mechanism 24 that achieves tilt lock and telescopic lock by tightening the movable bracket 23 together with the groove portion 14 of the outer jacket 12 to the fixed side plate 20 of the upper fixing bracket 21.

  The lock mechanism 24 has a central axis (not shown in FIG. 1; not shown in FIG. 1) extending in a direction orthogonal to both the tilt direction Y and the telescopic direction (axial direction X) (a direction orthogonal to the paper surface in FIG. 1). A lock shaft 25 having a central axis C1) in FIG. 2, which is a schematic side view, and an operation lever 26 that is rotated around the central axis C1 of the lock shaft 25 by a driver.

  As shown in FIG. 2 showing a locked state by the locking mechanism 24, a protrusion 27 as an engaging portion provided on, for example, the fixed side plate 20 of the upper fixing bracket 21 and a protrusion 28 as an engaging portion provided on the outer jacket 12. In between, there is an urging member 29 made of, for example, a tension coil spring that urges the column jacket 5 upward Y1 in the tilt direction Y. One end of the biasing member 29 is locked to the protrusion 27, and the other end of the biasing member 29 is locked to the protrusion 28.

The fixed side plate 20 is formed with a tilt long hole 30 that extends in the tilt direction Y through the lock shaft 25. The movable bracket 23 fixed to the inner jacket 11 has a telescopic elongated hole 31 extending in the telescopic direction (axial direction X) through the lock shaft 25.
Further, a convex portion 32 is provided on the movable side plate 36 of the groove-shaped portion 14 of the outer jacket 12. The fixed side plate 20 is provided with a guide hole 33 with which the convex portion 32 is engaged. The guide hole 33 extends in the tilt direction Y and functions to guide the convex portion 32 when adjusting the tilt.

The tilt member TM that is displaced in the tilt direction Y around the tilt support shaft 18 during tilt adjustment includes an outer jacket 12 provided with a movable side plate 36 along the fixed side plate 20, and a convex portion 32 provided on the movable side plate 36. It is comprised including.
In addition, the steering column device 1 moves the operating lever 26 in the locking direction R1 around the central axis C1 of the lock shaft 25 (when the lock direction R1 in FIG. 2 is a clock) at least when unlocking (in the state shown in FIGS. 5 and 6). For example, a tension coil spring that urges in the rotational direction and the unlocking direction R2 is the counterclockwise direction). The urging member 34 includes a first end 341 engaged with the convex portion 32 included in the tilt member TM, and a second end engaged with the operation lever 6 at a position separated from the central axis C1 of the operation lever 26. Part 342.

The first end portion 341 is hooked and engaged with an engaging portion (schematically illustrated in FIG. 2) formed of, for example, a hole provided in the convex portion 32, and the second end portion 342 is engaged with the operation lever 26. For example, it is hooked and engaged with an engaging portion 35 formed of, for example, a hole.
The urging member 34 may be extended beyond the free length at the time of locking shown in FIG. 2, and may apply an urging force in the lock direction R <b> 1 to the operation lever 26.

Further, the urging member 34 is just free length at the time of locking shown in FIG. 2, and does not need to apply the urging force in the lock direction R <b> 1 to the operation lever 26.
FIG. 3 is a schematic side view of a main part of the steering column device 1, and corresponds to a cross-sectional view taken along line III-III in FIG. Referring to FIG. 3, the groove portion 14 of the outer jacket 12 of the column jacket 5 includes a pair of a movable side plate 36 along the fixed side plate 20 of the upper fixing bracket 21 and a vertical direction (tilt direction Y) of the movable side plate 36. A pair of flange plates 37 and 38 extending in an intersecting manner from the end portions 361 and 362 are provided. The movable side plate 36 is provided with a round insertion hole 39 through which the lock shaft 25 is inserted.

The connecting portions of the movable side plate 36 and the flange plates 37 and 38 are inclined in directions opposite to each other with respect to the central axis C1 of the lock shaft 25 and correspond to the telescopic direction (a direction perpendicular to the paper surface; corresponding to the axial direction X). The guide grooves 40 and 41 are formed to extend to.
The movable bracket 23 is disposed on the opposite side of the fixed side plate 20 with respect to the movable side plate 36, and the side plate 42 along the movable side plate 36 and a pair of ends of the side plate 42 with respect to the central axis C <b> 1 of the lock shaft 25. A pair of inclined plates 43 and 44 are provided that extend in oppositely inclined shapes and whose front ends are fixed to the outer periphery of the inner jacket 11.

The movable bracket 23 is guided in the telescopic direction (axial direction X) while the inclined plates 43 and 44 slide relative to the sliding members 45 and 46 fixed to the grooves 40 and 41, respectively. Yes.
The lock shaft 25 of the lock mechanism 24 includes a shaft body 48 that is inserted through the elongated slot 30 of the fixed side plate 20, the insertion hole 39 of the movable side plate 36 of the outer jacket 12, and the insertion hole 47 of the side plate 42 of the movable bracket 23. ing. The lock shaft 25 includes a pressing portion 49 that is provided at one end of the shaft body 48 in the axial direction and presses the movable side plate 36 against the fixed side plate 20 via the movable bracket 23.

In addition to the lock shaft 25 and the operation lever 26, the lock mechanism 24 is a motion conversion mechanism that converts the rotation of the operation lever 26 into movement in the axial direction Z of the lock shaft 25 and presses the fixed side plate 20 and the movable side plate 36. Cam mechanism 50 and a slide plate 51 interposed between the pressing portion 49 of the lock shaft 25 and the side plate 42 of the movable bracket 23.
The slide plate 51 has a telescopic horizontal insertion hole 52 through which the lock shaft 25 is inserted and extends in the telescopic direction (corresponding to a direction parallel to the axial direction X). The slide plate 51 includes a first portion 511 that faces the side plate 42 with a gap, and a second portion 512 that extends along each of the inclined plates 43 and 44. The axial direction Z of the lock shaft 25 is along the plate thickness direction PT of the fixed side plate 20, the movable side plate 36, the side plate 42, and the first portion 511 of the slide plate 51.

  The shaft body 48 of the lock shaft 25 forms, for example, a two-surface width at a portion inserted through the insertion hole 52 of the slide plate 51. Thereby, the rotation of the lock shaft 25 is restricted. A threaded portion 53 is provided at the other end in the axial direction Z of the shaft body 48 of the lock shaft 25. A nut 54 is screwed to the screw portion 53. The nut 54 presses and fixes the annular thrust plate 55 fitted to the screw portion 53 to the stepped portion 56 at one end of the screw portion 53.

  An insertion hole 57 through which the shaft body 48 of the lock shaft 25 is inserted is formed at the base end of the operation lever 26. The rotation of the cam mechanism 50 is restricted by the first cam 58 (rotating cam) that is rotatably fitted on the outer periphery of the shaft body 48 of the lock shaft 25 and the elongated slot 30 for the fixed side plate 20. And a second cam 59 that is movable in the axial direction Z and engaged with the first cam 58.

Referring to FIG. 4, which is an enlarged cross-sectional view of a part of FIG. 3, the first cam 58 includes a cylindrical first portion 581 that is rotatably fitted to the outer periphery of the shaft body 48, and the first cam 581. An annular plate-like second portion 582 extending radially outward from the axially intermediate portion of the first portion 581.
The second cam 59 has a portion 591 a that is fitted to the outer periphery of one end 581 a of the first portion 581 of the first cam 58 so as to be relatively rotatable, and a portion 591 b that is inserted through the long slot 30 for tilting of the fixed side plate 20. A cylindrical first portion 591 and a second portion 592 extending radially outward from one axial end of the first portion 591 and facing the first portion 581 of the first cam 58 in the axial direction Z are provided. ing.

The other end 581b of the first portion 581 of the first cam 58 is fitted in the insertion hole 57 of the operation lever 26 so as to be integrally rotatable. Specifically, the cross-sectional shapes of the other end 581b of the first portion 581 and the insertion hole 57 are, for example, shapes that form a two-sided width. As a result, the operation lever 26 and the first cam 58 rotate integrally.
On the other hand, one end 581a of the first portion 581 of the first cam 58 is fitted to the inner periphery of the portion 591a of the first portion 591 of the second cam 59 so as to be relatively rotatable. Cam protrusions (not shown) that engage with each other as the first cam 58 and the second cam 59 rotate relative to the opposing surfaces of the second portion 582 of the first cam 58 and the second portion 592 of the second cam 59. Z).

A surface of the second cam 59 opposite to the facing surface of the second portion 592 extends along the fixed side plate 20 of the upper fixing bracket 21. That is, the second portion 582 of the first cam 58 and the second portion 592 of the second cam 59 are sandwiched between the thrust plate 55 fixed to the lock shaft 25 and the fixed side plate 20.
When the operation lever 26 is rotated, the first cam 58 rotated with the rotation of the operation lever 26 changes the rotation position with respect to the second cam 59. As a result, the lock shaft 25 moves in the axial direction Z, the distance between the fixed side plate 20 and the nut 54 is changed, and the pressing portion 49 approaches or separates from the fixed side plate 20.

  At least the surface of the thrust plate 55 facing the operation lever 26 is made of a low friction member (for example, fluororesin). As a result, when the operating lever 26 is rotated, the frictional resistance between the operating lever 26 and the thrust plate 55 is reduced so that the operating lever 26 can rotate smoothly. In place of the thrust plate 55, a thrust bearing may be used.

In the first portion 591 of the second cam 59, an urging member 60 made of, for example, a compression coil spring surrounding the shaft body 48 of the lock shaft 25 is accommodated. The biasing member 60 is elastically compressed in the axial direction Z between one end 581a of the first portion 581 of the first cam 58 and the movable side plate 36 of the groove-shaped portion 14.
The urging force of the urging member 60 urges the lock shaft 25 to the axial lock side Z1 via the first cam 58, the operation lever 26, the thrust plate 55, and the nut 54. Specifically, the pressing portion 49 of the lock shaft 25 is biased in a direction approaching the fixed side plate 20 (lock side).

  FIG. 5 shows a state after unlocking in which the operation lever 26 is rotated in the unlocking direction R2 from the locked state shown in FIG. 2 and the lock mechanism 24 releases the lock. Along with the rotation operation of the operation lever 26 in the unlocking direction R2, the urging member 34 made of a tension coil spring is extended. As a result, the urging force of the urging member 34 acts in the direction in which the operation lever 26 is rotated in the lock direction R1.

  That is, according to the present embodiment, the operation lever 26 is urged in the lock direction R1 by the urging member 34 at the time of unlocking shown in FIG. Accordingly, it is possible to suppress backlash of the cam mechanism 50 and the like of the lock mechanism 24 at the time of telescopic operation after unlocking, thereby suppressing vibration of the operation lever 26. Therefore, vibration of the entire steering column device 1 can be suppressed, and the driver can be prevented from experiencing vibration through the steering member 2.

  In particular, after unlocking, even if the position of the tilt member TM (the outer jacket 13 and the convex portion 32, etc.) is changed by the tilt adjustment from the state shown in FIG. Since the first end portion 341 moves along with the tilt member TM (specifically, the convex portion 32), the set length of the biasing member 34 is maintained constant, and the biasing force of the biasing member 34 is maintained constant. be able to. Accordingly, the urging force of the operation lever 26 in the lock direction R1 can be maintained constant regardless of the position change of the tilt member TM due to the tilt adjustment.

  Further, the operating lever 26 can be easily urged in the lock direction R1 by the tension coil spring as the urging member 34. The urging force of the urging member 34 applied in the lock direction R1 (corresponding to the spring tension when the urging member 34 is a tension coil spring) may be weak within a range in which the vibration suppressing effect can be obtained. If the biasing force is weak, the tilt operation force is hardly increased, and the operability of the operation lever 26 is not deteriorated.

Further, since the guide convex portion 32 provided on the movable side plate 36 is used for the engagement of the first end portion 341 of the biasing member 34, the engagement for engaging the first end portion 341 separately from the convex portion 32. The structure can be simplified as compared with the case where elements are provided.
Furthermore, in this embodiment, noise and vibration caused by the following phenomenon can be suppressed. That is, in the assembly process of the steering column device 1, the lock shaft in which the two-surface width portion of the shaft body 48 is inserted into the slide plate 51 and the insertion hole 52 provided in the slide plate 51 that extends in the telescopic direction. The shaft body 48 may be twisted with respect to the insertion hole 52 in the state of the subassembly including 25 and other components.

  In that case, the peripheral edge of the insertion hole 52 is slightly damaged, and after the steering column device 1 is assembled, when the telescopic adjustment is performed in the unlocked state, the shaft body 48 is damaged at the peripheral edge of the insertion hole 52. There is a risk of vibration due to the effect of the sticking. This vibration generates noise in the vicinity of the cam mechanism 50 or vibrates the operation column 26 to vibrate the entire steering column device 1. As a result, unpleasant vibration is transmitted to the driver's hand via the steering member 2. There is concern.

On the other hand, in this embodiment, since the operation lever 26 is urged in the lock direction R1 by the urging member at the time of unlocking, the rattling near the cam mechanism 50 is suppressed and the generation of noise is suppressed. be able to. In addition, the vibration of the operation lever 26 can be suppressed, and the driver can be prevented from experiencing the vibration.
The tilt member TM that is displaced in the tilt direction Y centered on the tilt support shaft 18 during tilt adjustment includes the inner jacket 11 and the movable bracket 23 in addition to the outer jacket 12 provided with the movable side plate 36 along the fixed side plate 20. And an operation lever 26 are also included. The first end 341 of the urging member 34 that applies the urging force in the lock direction R1 to the operation lever 26 by engaging the second end 342 with the operation lever 26 can be engaged with a member other than the operation lever 26. is necessary. In the present embodiment in which both tilt adjustment and telescopic adjustment are possible, the inner jacket 11 and the movable bracket 23 are displaced in the telescopic direction (axial direction X) at the time of telescopic adjustment. When the first end portion of the urging member urging to the inner jacket 11 or the movable bracket 23 is engaged, the urging force of the urging member changes during telescopic adjustment. Therefore, in the steering column device of this embodiment capable of both tilt adjustment and telescopic adjustment, the target to be engaged with the first end 341 of the biasing member 34 is the tilt member TM that is displaced in the tilt direction Y during the tilt adjustment. Among them, a member that is not displaced in the telescopic direction (axial direction X) during telescopic adjustment and that is a member other than the operation lever 26 (for example, the outer jacket 12) is required.

On the other hand, in a steering column device that can perform only tilt adjustment, the first end portion of the urging member may be engaged with any tilt member TM (excluding the operation lever 26).
Next, FIG. 7 is a schematic side view of the steering column device 1A according to another embodiment of the present invention when unlocked. Referring to FIG. 7, the present embodiment is different from the embodiment of FIG. That is, the locking direction R1A (corresponding to the counterclockwise direction) and the unlocking direction R2A of the operation lever 26 of the present embodiment are the same as the locking direction R1 (corresponding to the clockwise direction) and the unlocking direction R2 of the embodiment of FIG. Is in the opposite direction.

  Further, the movable side plate 36 of the groove-shaped portion 14 of the outer jacket 12 as the tilt member TM is provided with a convex portion 61 protruding outward, separately from the convex portion 32 for guide, and is provided on the convex portion 61. The first end portion 341 of the biasing member 34A made of a tension coil spring is hooked and engaged with the engaging portion made of the engaging hole. In the constituent elements of this embodiment, the same constituent elements as those of the embodiment of FIG. 2 are denoted by the same reference numerals as those of the constituent elements of the embodiment of FIG. Also in this embodiment, the same effect as the embodiment of FIG. 2 can be obtained.

In addition, this invention is not limited to the said embodiment, You may use a compression coil spring (not shown) as a biasing member which biases an operation lever to a locking direction. Further, as the urging member, an elastic rod other than the coil spring or other elastic member (not shown) may be used.
In the embodiment, the fixed side plate and the movable side plate are disposed only on one side of the pair of side portions of the steering shaft. However, the present invention is not limited to this, and the first fixed side plate is provided on one side of the steering shaft. The first movable side plate may be disposed (not shown), and the second fixed side plate and the second movable side plate may be disposed on the other side of the steering shaft (not shown). In addition, various modifications can be made within the scope of the claims of the present invention.

  DESCRIPTION OF SYMBOLS 1; 1A ... Steering column apparatus, 2 ... Steering member, 4 ... Steering shaft, 5 ... Column jacket, 11 ... Inner jacket, 12 ... Outer jacket (tilt member), 13 ... Cylindrical part, 14 ... Groove-shaped part, 18 DESCRIPTION OF SYMBOLS ... Tilt support shaft, 19 ... Fixed top plate, 20 ... Fixed side plate, 21 ... Upper fixed bracket, 22 ... Car body side member, 23 ... Movable bracket, 24 ... Lock mechanism, 25 ... Lock shaft, 26 ... Operation lever, 30 ... Tilt slot, 31 ... telescopic slot, 32 ... convex, 33 ... guide hole, 34; 34A ... biasing member, 341 ... first end, 342 ... second end, 35 ... engaging part, 36 ... movable side plate, 48 ... shaft body, 49 ... pressing portion, 50 ... cam mechanism, 51 ... slide plate, 58 ... first cam, 59 ... second cam, C1 ... central axis (of the lock shaft), TM ... tilt Member, R1; 1A ... locking direction, R2; R2A ... unlocking direction, X ... axial direction (a telescopic direction), Y ... tilt direction, (the lock shaft) Z ... axial

Claims (3)

A fixed side plate fixed to the vehicle body side member;
A tilt member that includes at least a movable side plate along the fixed side plate and is displaced in a tilt direction about a tilt support shaft during tilt adjustment;
A lock shaft that passes through a long slot for tilt provided in the fixed side plate and an insertion hole provided in the movable side plate, an operation lever that is rotated around a central axis of the lock shaft, and rotation of the operation lever And a lock mechanism including a cam mechanism that presses the fixed side plate and the movable side plate,
A biasing member that biases the operation lever in a locking direction around a central axis of the lock shaft at least when unlocked;
Wherein the biasing member is seen containing a first end engaged to said tilt member, and a second end engaged with the operating lever at a position spaced from the central axis of the operating lever, lock When adjusting the tilt in the released state, the biasing force in the locking direction with respect to the operation lever is maintained constant by maintaining a constant length between the first end and the second end. steering column apparatus has been.   The steering column device according to claim 1, wherein the biasing member is a tension coil spring. In Claim 1 or 2, the convex part provided in the movable side plate and included in the tilt member, and a guide hole provided in the fixed side plate for guiding the convex part during tilt adjustment,
A steering column device in which a first end portion of the urging member is engaged with the convex portion.

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