JP2012208821A - Knob device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knob device which improves a design quality by suppressing backlash.SOLUTION: In a knob device, a bearing reinforcing part is provided inside an operation knob and is connected to an encoder, a bar part is provided inside the bearing reinforcing part to restrict a sliding position of the operation knob, and a fitting claw is provided in the same direction as that of a shaft of a bearing part. When a predetermined load is applied to the operation knob, the bearing part breaks the bar part, and thereby, the slide restriction of the operation knob is released and the operation knob is sunk.

Description

  The present invention relates to an on-vehicle knob device including a media player and a car navigation system mounted on a vehicle.

  In-vehicle electronic devices mounted on automobiles typically have a switch or volume knob for operating the same protruding from the panel.

  For safety in the event of a traffic accident, such a knob should not protrude beyond a certain height from the panel surface, that is, the amount of protrusion in the passenger compartment is currently 9.5 mm or less. As a result, there is a problem in operability because the gripping cost is reduced.

  When the protrusion amount of the knob is set to 9.5 mm or more in order to improve the operability, the protrusion amount of the knob is 9.5 mm when a constant load (37.8 daN) is applied by the occupant at the time of the automobile collision. Must be: A knob device for satisfying this condition is disclosed in Japanese Patent Application Laid-Open No. 2004-151867.

  The knob device described in Patent Document 2 is shown in the sectional view of FIG. As shown in FIG. 8, the knob 11 is fitted with an inner knob portion 11 having a through-shaft hole 11 a into which a variable resistor shaft 12 a on a printed board (not shown) is inserted, and an outer side of the inner knob portion 11. And an outer knob portion 10 to be joined. In addition, a part of the occupant's body collides with the inside of the through-shaft hole 11a due to a collision of the vehicle with a shaft protrusion 11d that fits into the engagement groove 12b provided in the shaft 12a of the variable resistor, When an impact load F is applied to the knob 10, an impact absorbing projection 11c that can be broken by collision with the tip of the shaft 12a is provided. A method of realizing a knob device capable of absorbing shock with an inexpensive and simple configuration by assembling the outer knob part 10 and the inner knob part 11 which are resin-molded in this manner is known (see, for example, Patent Document 1). .

JP 2001-266704 A JP 2010-153058 A

  As shown in FIGS. 7 and 8, the in-vehicle knob device described in Patent Document 1 has a depression function between the knob and the encoder so as to be equal to or lower than a regulation value height below a certain load. A component called an inner (inner knob) 11 is used. However, the structure of the inner knob portion 11 and the knob 10 has the following problems because the fitting portion is provided for the right and left play restrictions. First, the encoder 10 and the inner knob portion 11 and the slit 10a and the slit 11b for opening the fitting portion when the inner knob portion 11 and the knob 10 are assembled are necessary. The slit 11b is opened and the play in the left-right direction is generated. Second, when the strength of the through-shaft hole 11a is increased in order to suppress the play, the fitting force between the encoder 12 and the inner knob portion 11 changes, and the holding force in the axial direction (the depression direction) changes. Therefore, it becomes necessary to tune the strength of the depressed portion, satisfying the vehicle safety regulations, and improving the design quality by suppressing the play.

The present invention has been made in order to solve the conventional problems, and an object of the present invention is to provide a knob device that has improved design quality by suppressing play.

  The knob device of the present invention includes a bearing reinforcement portion provided inside the operation knob and coupled to the encoder, a crosspiece portion provided inside the bearing reinforcement portion and restricting the slide position of the operation knob, and a shaft of the bearing reinforcement portion. And a fitting claw in the same direction as that of the operation knob. When a predetermined load is applied to the operation knob, the bearing portion breaks the crosspiece and the slide restriction of the operation knob is released and the operation knob is depressed.

  The on-vehicle knob device according to the present invention can reduce backlash and improve the quality.

  According to the on-vehicle knob device according to the present invention, the D-type shaft-equipped encoder 9 can be used at a lower cost than the I-type shaft-equipped encoder 12 used in the prior art, and this is advantageous in terms of cost. Play. Here, “encoder with I-type shaft” refers to an encoder having two planes (cut) on the side surface of the shaft, and “encoder with D-type shaft” refers to a plane (cut) on one side. It points to the encoder.

External perspective view of in-vehicle device of the present invention Appearance front view of in-vehicle device of the present invention External perspective view of in-car knob device of the present invention ZY plane sectional view of the in-vehicle knob device of the present invention Y-X plane cross-sectional view of the on-vehicle knob device of the present invention Sectional drawing of the in-vehicle knob device of the present invention External perspective view of a conventional in-car knob device Sectional view of a conventional in-car knob device

Hereinafter, the details of the on-vehicle knob device of the present invention will be described with reference to the drawings.
FIG. 1 shows an AV navigation apparatus 1 as an in-vehicle electronic apparatus according to an embodiment of the present invention. In the following description, the X direction shown in FIG. 1 will be described as the width direction, the Y direction as the depth direction, and the Z direction as the height direction.

  As shown in FIG. 1, it includes a housing 2, a display 6, and an operation panel 3, and the operation panel 3 includes an operation knob 5 a, an operation knob 5 b, and an operation button 4.

  In FIG. 1, an AV navigation device 1 (on-vehicle electronic device) includes a housing 2 that houses therein a CD deck and a radio tuner (not shown) or a printed circuit board on which an IC for electrically controlling them is mounted. It is comprised so that the operation panel 3 can be fitted in the front part of the housing | casing 2. FIG. The housing part on the back side of the operation panel 3 is incorporated in the center console of the automobile, and when attached to the vehicle, the operation panel 3 is exposed to the user in appearance, and an air conditioner panel in the vehicle interior, etc. It is mounted so as to give a sense of unity with other panels.

  As shown in FIGS. 3 and 4, the external knob portion 7 includes an external knob portion 7 of a depressed inner 8 and an encoder 9.

4 and 5 show cross-sectional views (cross-section in the axial direction) of the knob device, and FIG. 3 is an external perspective view of the on-vehicle knob device of the present invention. FIG. 4 is a ZY plane sectional view of the on-vehicle knob device of the present invention. FIG. 5 is a YX plane cross-sectional view of the on-vehicle knob device of the present invention. FIG. 6 is a cross-sectional view (circular cross section) of the on-vehicle knob device of the present invention.

  As shown in FIGS. 3 to 6, the outer knob 7 and the depressed inner 8 are fitted in the shape of the holes of the claw fitting portion 7b and the depressed inner 8e of the outer knob portion 7, and the depressed inner 8 and the shaft portion 9a are fitted. This is performed by the claw portion of the depressed inner portion and the hooking groove portion 9b of the encoder. The two fittings are performed at different places, thereby enabling a structure that eliminates the slits 10a and 11b that have caused backlash.

  Since the claw fitting portion 8a is deformed outward (downward in FIG. 3) when the depressed inner portion 8 and the shaft portion 9a are fitted, the external knob portion 7 is provided with a claw escape portion 7a. At this time, the nail relief portion 7a is a wall portion 8c (a shape like a C shape) from which only one cylindrical shape as shown in FIG. 6 is deleted, so that there is little deformation when receiving a load in the radial direction. have.

  Contact is made between the flat portion 9c of the encoder and the flat portion 8b of the depressed inner. When the user rotates the knob 7, the entire knob device is rotated by the contact between the planes.

  When the shaft portion 9a is inserted into the recessed inner portion 8, the edge portion 9d of the encoder is caught on the wall portion 8c of the recessed inner portion 8, and therefore an edge relief shape 8g is provided to improve the assembly workability.

  As shown in FIG. 6, except for the claw fitting portion 8a and the edge relief portion 8g, the shaft portion 9a and the wall portion 8c are in contact with each other, and the contact area between the encoder shaft portion and the depressed inner portion is increased to the maximum. It is possible to prevent rattling of the external knob portion 7 as much as possible.

  With respect to the knob device configured as described above, the operation when the external knob portion 7 is depressed due to impact will be described.

  When the external knob portion 7 receives an impact in the downward direction of FIG. 4, the knob 7 is engaged with the depressed inner portion 8, so that the depressed inner portion 8 receives the load downward. In the axial direction, the depressed inner 8 and the shaft portion 9a are in contact only with the depressed bar 8d of the depressed inner 8, so that all the load applied to the knob is applied to the depressed bar 8d. 6 When the knob 7 and the depressed inner 8 sink downward, and a load is applied to the depressed beam 8d, a concentrated load is generated on the depressed beam 8f, the depressed beam 8d breaks, and the tip of the encoder 9 is the encoder It moves to the escape part 7c.

  As a result, the depression bar 8d with the claw fitting portion 8a that has regulated the sliding amount of the external knob portion 7 cannot regulate the position of the knob 7, and the external knob portion 7 is depressed.

  Therefore, it is possible to use a knob with a structure that can be depressed when subjected to a certain load and suppress backlash, and can use an encoder with a low unit price. This is also advantageous.

  As described above, the on-vehicle knob device according to the present invention is advantageous in suppressing looseness and improving the quality. As a result of the above, the present invention has high industrial applicability because it is advantageous in terms of cost.

DESCRIPTION OF SYMBOLS 1 AV navigation apparatus 2 Case 3 Operation panel 4 Operation button 5 Operation knob 5a Operation knob (left)
5b Operation knob (right)
6 Display 7 External knob portion 7a Claw relief portion 7b Claw fitting portion 7c Encoder relief portion 8 Depressed inner 8a Claw fitting portion 8b Planar portion 8c Wall portion 8d Depressed beam 8e Depressed inner 8f Depressed beam 8g Edge relief shape 9 Encoder 9a Shaft Part 9b Hanging groove part 9c Flat part 9d Edge part 10 Outer knob part (conventional structure)
10a Slit 11 Inner knob (conventional structure)
11a Through-shaft hole 11b Slit 11c Shock absorbing protrusion 11d Shaft retaining protrusion 12 Encoder (conventional structure)
12a shaft 12b engagement groove

Claims (1)

A bearing reinforcement provided inside the operation knob and connected to the encoder;
A crosspiece that is provided inside the bearing reinforcing portion and regulates the slide position of the operation knob;
A fitting claw is provided in the same direction as the shaft of the bearing reinforcing portion,
A knob device characterized in that when a predetermined load is applied to the operation knob, the bearing portion breaks the crosspiece, and the slide restriction of the operation knob is released and the depression is depressed.

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