JP2004119336A - Dialing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dial device of which an operation dial is correctly positioned and mounted to a rotational operation axis by improving operation efficiency. <P>SOLUTION: The dial device comprises the rotational operation axis 4 having a first positioning fitting part 8, and a dial member 10 mounted to the rotational operation axis 4. The dial member 10 comprises an operation part 11 having a display part 13, a boss part 12 having a fitting hole 16 into which the rotational operation axis 4 is fitted so as to integrally protrude out at the central part of the operation part 11, and a second positioning fitting part 17 arranged to the fitting hole 16. A bottom part 18 of the fitting hole 16 forms a standard surface stipulating the fitting amount by being collided with a top end surface 4a of the rotational operation axis 4. A discrimination opening 14 is formed on the operation part 11 by notching the bottom part 18 corresponding to the second positioning fitting part 17 and making a part of the fitting hole 16 penetrate therein, so that a fitting state of the first positioning fitting part 8 and the second positioning fitting part 17 is enabled to be discriminated through the discrimination opening 14. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dial device that is attached to a rotary switch, a tuner, or the like, and that is configured by positioning and fixing a dial member in a rotational direction with respect to a rotary operation shaft.
[0002]
[Prior art]
For example, in a rotary switch, a rotary operation shaft is rotatably provided with respect to a switch main body, and the internal contact mechanism is switched by rotating this rotary operation shaft. Generally, the rotary switch is provided with a dial device that assembles a dial member at a distal end portion of a rotary operation shaft to form a rotary operation portion and a display portion of a switching position of the internal contact mechanism.
[0003]
In general, a dial device is configured such that a dial member is formed integrally with a disc-shaped operation portion having a display portion provided on one main surface and a central portion of the other main surface of the operation portion, and a rotary operation shaft is fitted thereto. And a boss having a fitting hole. In the dial device, the rotary operation shaft and the dial member are positioned such that the switching position of the internal contact mechanism and the display thereof are aligned with respect to the reference position, and the dial device can be detachably operated in the axial direction. It is configured to be fixed so as to rotate integrally with the rotation direction.
[0004]
For this reason, in a conventional dial device, for example, a rotary operation shaft is formed in a D-shaped cross section by forming a notch in an axial direction by reaching an end portion at a part of an outer peripheral portion, and is formed on a dial member. The fitting hole of the boss portion into which the rotary operation shaft fits has a D-shaped cross section. The dial device can be fitted only when the rotary operation shaft and the dial member are combined with a part cut out in a D-shape and a part left uncut in a D-shape.
[0005]
In the conventional dial device, not only the so-called D-cut fitting structure described above, but also, for example, an axial slit opened at the tip end portion of the rotary operation shaft is formed, and the rotary operation shaft is provided in the fitting hole on the dial member side. A structure in which a fitting wall connecting the hole walls corresponding to the slits is also employed. The dial device can be fitted only when the rotary operation shaft and the dial member align the fitting wall with the slit.
[0006]
[Patent Document 1]
JP 2001-110608 A
[Problems to be solved by the invention]
By the way, in the dial device, a structure that regulates the axial fitting position between the rotary operation shaft and the dial member is required. In a dial device, when the dial member is pushed into the rotary operation shaft more than necessary and assembled, the inner surface of the dial member and the end of the boss are pressed against the switch body and the equipment panel, and the rotary operation is smooth. May not be possible or impossible. Further, in the dial device, when the dial member is pushed into the rotation operation shaft to a predetermined position and cannot be assembled, the dial member may fall off.
[0008]
Therefore, the conventional dial device has a so-called blind hole structure in which the fitting hole of the dial member is closed on the main surface of the operation unit, and the tip end surface of the fitted rotary operation shaft is formed by the fitting hole. It is configured such that the fitting position in the axial direction is regulated by abutting on the bottom.
[0009]
However, in such a dial device, it is difficult to visually recognize the fitting position between the rotary operation shaft having the D-cut fitting structure and the fitting hole. For this reason, in the dial device, it is necessary to search for the fitting position while rotating the dial member at the time of assembly, and there is a problem that workability is poor. Further, in the dial device, by performing such a search operation, the distal end portion of the rotary operation shaft and the opening portion of the fitting hole may be rubbed and damaged or damaged.
[0010]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a dial device that enables an operation dial to be accurately aligned with a rotary operation shaft and assembled when working efficiency is improved.
[0011]
[Means for Solving the Problems]
A dial device according to the present invention that achieves this object includes: a rotary operation shaft having a first positioning fitting portion formed by an axial notch formed at an outer peripheral portion to reach a tip portion; A dial member attached to the shaft. The dial device has a disc-shaped operation portion having a display portion provided on a first main surface, and a fitting integrally formed at a central portion of the operation portion on a second main surface side to which a rotary operation shaft is fitted. A boss portion having a mating hole, and a second positioning fitting portion in the axial direction formed opposite to the first positioning fitting portion on the rotation operation shaft side inside the fitting hole, A bottom surface of the fitting hole is abutted against a tip end surface of the rotary operation shaft to constitute a reference surface for defining a fitting amount. The dial device forms an identification opening in the operation portion of the dial member by cutting out a bottom portion corresponding to the second positioning engagement portion and penetrating a part of the engagement hole. It constitutes an identification part of a fitting state between the positioning fitting part and the second positioning fitting part.
[0012]
According to the dial device of the present invention configured as described above, the first positioning fitting is performed by the rotary operation shaft being fitted into the fitting hole of the dial member until the distal end surface abuts against the bottom. The part and the second positioning fitting part are engaged with each other to be positioned and fixed in the rotational direction, and the fitting position is regulated to be assembled. According to the dial device, assembling of the dial member with respect to the rotary operation shaft while visually confirming the fitting position between the first positioning fitting portion and the second positioning fitting portion via the identification portion opened in the operation portion. By performing the operation, work efficiency is improved and accurate assembly is performed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a dial device 1 shown in the drawings as an embodiment of the present invention will be described in detail. The dial device 1 shown as an embodiment is attached to a rotary switch 2 to perform a switching operation of an internal contact mechanism and to display a switching position. The dial device 1 includes a rotary operation shaft 4 protruding from the switch main body 3 of the rotary switch 2, and a dial member 10 attached to a tip of the rotary operation shaft 4.
[0014]
Although the details of the rotary switch 2 are omitted, the rotary operation shaft 4 protrudes from the upper frame 5 of the switch main body 3 as shown in FIGS. 1 and 2, and is assembled via a fitting structure described in detail later. By rotating the dial member 10, the internal contact mechanism is switched. The rotary switch 2 has a large number of output terminal pieces 6 protruding from the side surface of the switch body 3, and is mounted on a switch wiring board, for example, by fitting each output terminal piece 6 into a terminal hole and soldering. .
[0015]
Although not described in detail, the rotary switch 2 has a rotary operation shaft 4 rotatably supported by a bearing mechanism inside the switch body 3, and the rotary operation shaft 4 is provided with a movable contact. In the rotary switch 2, a common contact and a plurality of fixed contacts connected to each output terminal strip 6 are formed concentrically on a wiring board through which the rotary operation shaft 4 passes, and the rotary operation shaft 4 is rotated. As a result, the movable contact is selectively connected to the fixed contact, and the switch is switched.
[0016]
The rotary switch 2 is provided with a boss 7 having a guide hole 7a at the center of the upper frame 5, and the rotary operation shaft 4 protrudes from the guide hole 7a. Note that the upper frame 5 is integrally formed with a mounting piece 5a which is bent in the same direction as the output terminal piece 6 on the outer peripheral portion, fitted into a mounting hole formed in the switch wiring board, and soldered. .
[0017]
The rotary operation shaft 4 is formed of a synthetic resin, and has a cylindrical shape having a center hole 4a at a portion protruding from the boss 7 as shown in FIG. A first positioning fitting portion 8 is formed in the rotary operation shaft 4 by a notch having a substantially D-shaped cross section in the axial direction reaching the distal end surface 4b at a position slightly lateral to the center. The rotation operation shaft 4 has a center hole 4a, so that it has some convergence characteristics in the axial direction, so that the rotation operation shaft 4 is firmly combined with the dial member 10 as described later. The rotary operation shaft 4 has a substantially D-shaped cross-section by cutting a part of the outer peripheral part in an arc shape in the axial direction by the first positioning fitting part 8.
[0018]
The rotary operation shaft 4 has a fitting guide recess 9 formed at an arc-shaped outer peripheral portion facing the first positioning fitting portion 8. The fitting guide recess 9 is formed of a small-width notched groove in the axial direction, which is opened on the distal end face 4 b of the rotary operation shaft 4.
[0019]
The dial member 10 includes a disc-shaped operation unit 11 integrally formed of a synthetic resin, and a boss 12 protruding from the operation unit 11. The operation unit 11 has a function of rotating the rotation operation shaft 4 and displaying a setting state of an internal contact of the rotary switch 2. As shown in FIGS. 3 to 6, a flange portion 12 is integrally formed on an outer peripheral portion of the operation portion 11 over the entire periphery, and a large number of non-slip irregularities are formed on the outer peripheral portion of the flange portion 12. Have been.
[0020]
The operation portion 11 has a first main surface 11a located outside when the dial member 10 is mounted on the rotary operation shaft 4 as described later, and a display numeral 13 is provided as shown in FIG. Is composed. The operation section 11 has an identification opening 14 located substantially at the center thereof, and has a fitting guide projection 15 formed to project from the identification opening 14.
[0021]
The identification opening 14 is a substantially semicircular opening in which both ends of a straight line portion whose one side is the center passing line of the operation unit 11 are connected in an arc shape. The identification opening 14 is formed such that the length, that is, the diameter, of the straight portion is substantially equal to the outer diameter of the rotary operation shaft 4. In the identification opening 14, irregularities are formed on the entire inner peripheral wall, and the inner diameter of each convex portion is slightly smaller than the outer diameter of the rotary operation shaft 4. A fitting guide projection 15 is formed in the identification opening 14 at the center of the arc-shaped portion facing the linear portion.
[0022]
As shown in FIG. 6, the fitting guide convex portion 15 includes an axial convex portion formed over the entire thickness of the operation portion 11 and the axial length of the boss portion 12. The width of the fitting guide convex portion 15 is substantially equal to the groove width of the fitting guide concave portion 9 formed on the rotary operation shaft 4. The fitting guide convex portion 15 is relatively fitted to the fitting guide concave portion 9 in a state where the dial member 10 is mounted on the rotary operation shaft 4 as described later.
[0023]
As shown in FIG. 4, the operating portion 11 is integrally formed with a boss portion 12 having a fitting hole 16 into which the rotary operation shaft 4 is fitted at a central position on the second main surface 11b side. The boss portion 12 has a shaft length slightly shorter than the shaft length of the cylindrical shaft portion of the rotary operation shaft 4 protruding from the boss portion 7 described above, and the inner diameter of the fitting hole 16 is smaller than that of the cylindrical shaft portion. It is formed substantially equal to the outer diameter. A second positioning fitting portion 17 is formed in the fitting hole 16 by a projection having a substantially D-shaped cross section in the axial direction reaching the opening at a position slightly lateral to the center. Therefore, the fitting hole 16 is configured as a shaft hole having a substantially D-shaped cross section.
[0024]
The fitting hole 16 is also formed with concavities and convexities over the entire inner peripheral wall continuously with the concavities and convexities of the identification opening 14, and the inner diameter of each protrusion is slightly smaller than the outer diameter of the rotary operation shaft 4. Have been. In the fitting hole 16, the fitting guide protrusion 15 described above is formed to extend to an opening at the center of the arc-shaped portion facing the linear portion. As shown in FIGS. 4 and 5, the fitting hole 16 has a semicircular portion penetrating through the center passage line as the above-described identification opening 14 in the operation portion 11, and the remaining portion is closed by the ceiling wall 18. ing. The ceiling wall 18 forms a reference surface that regulates the fitting position by abutting the distal end surface 4b of the rotary operation shaft 4 when the dial member 10 is assembled to the rotary operation shaft 4 as described later.
[0025]
The dial member 10 configured as described above constitutes the dial device 1 by fitting the rotary operation shaft 4 protruding from the switch body 3 into the fitting hole 16 and assembling them in a state where they are aligned with each other. In the dial device 1, the rotary operation shaft 4 is fitted into the fitting hole 16 of the dial member 10 such that the second positioning fitting portion 17 is combined with the first positioning fitting portion 8. In the dial device 1, the dial member 10 is fitted into the fitting guide concave portion 9 with the fitting guide convex portion 15 protrudingly formed in the fitting hole 16 and fitted into the rotary operation shaft 4.
[0026]
In this state, the dial device 1 pushes the dial member 10 against the rotary operation shaft 4 until the distal end surface 4b abuts on the ceiling wall 18. In the dial device 1, the amount of fitting of the dial member 10 to the rotary operation shaft 4 is thereby regulated, and the dial member 10 is assembled to the switch main body 3 with a predetermined gap as shown in FIG. In the dial device 1, the inner diameter of the fitting hole 16 is slightly smaller than the outer diameter of the rotary operation shaft 4 by forming the unevenness on the inner peripheral wall as described above. In the dial device 1, when the dial member 10 is pushed in, the rotary operation shaft 4 converges and accumulates an elastic force. The elastic force acts on the inner peripheral wall of the fitting hole 16 as a reaction force, so that the dial member 10 Shedding is prevented.
[0027]
In the dial device 1, the second positioning fitting portion 17 and the first positioning fitting portion 8 are engaged with the rotary operation shaft 4 by the dial member 10, and the fitting guide convex portion 15 is provided. Are fitted into the fitting guide recess 9 and assembled. Therefore, in the dial device 1, the rotary operation shaft 4 and the dial member 10 are positioned and assembled so that the switching position of the internal contact mechanism and the displayed numeral 13 coincide with the reference position. In the dial device 1, the dial member 10 is fixed so as to rotate integrally with the rotary operation shaft 4 in the rotation direction. The dial device 1 is assembled by a very simple operation such as pushing the dial member 10 in the axial direction with respect to the rotary operation shaft 4.
[0028]
In the dial device 1, the identification opening 14 is formed in the operation unit 11 of the dial member 10 as described above, and the first positioning is performed from the first main surface 11 a side of the operation unit 11 through the identification opening 14. The combination state of the fitting portion 8 and the second positioning fitting portion 17 can be identified. Therefore, in the dial device 1, the dial member 10 can be easily assembled to the rotary operation shaft 4, and the assembling efficiency can be improved. Further, in the dial device 1, the operation of searching for the fitting position while rotating to align the dial member 10 with respect to the rotary operation shaft 4 becomes unnecessary. Damage or damage to the opening of the fitting hole 16 is prevented.
[0029]
In the above-described embodiment, an application example of the dial device 1 attached to the rotary switch 2 has been described. However, the present invention is not limited to such an application example, and is applied to various devices such as a tuner. This applies to dialing devices. In the present invention, the rotary operation shaft 4 and the dial member 10 are not limited to the above-described structures, and include at least the first positioning fitting portion 8, the second positioning fitting portion 17, and the identification opening 14. What is necessary is just to be comprised.
[0030]
【The invention's effect】
As described above in detail, according to the dial device of the present invention, the rotary operation shaft and the dial member engage the first positioning fitting portion and the second positioning fitting portion to form the fitting hole. , It is accurately positioned in the rotational direction. Further, according to the dial device, the dial member with respect to the rotary operation shaft is visually recognized while the fitting position between the first positioning fitting portion and the second positioning fitting portion is visually recognized through the identification portion opened in the operation portion. By performing the assembling operation, work efficiency is improved and accurate assembling is performed.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a dial device attached to a rotary switch as an embodiment of the present invention.
FIG. 2 is a plan view of a main part of the dial device.
FIG. 3 is a front view of a dial member constituting the dial device.
FIG. 4 is a rear view of the dial member.
FIG. 5 is a vertical sectional view of the dial member taken along line AA in FIG. 3;
FIG. 6 is a longitudinal sectional view of the dial member taken along line BB in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dial device 2 Rotary switch 3 Switch main body 4 Rotating operation shaft 4b Tip surface 8 First positioning fitting part 9 Fitting guide concave part 10 Dial member 11 Operating part 12 Boss part 14 Identification opening 15 Fitting guide convex part 16 Fitting Hole 17 Second positioning fitting part 18 Ceiling wall (reference plane)

Claims (3)

A rotary operation shaft having a first positioning fitting portion formed by an axial notch formed in the outer peripheral portion to reach the tip portion;
A disc-shaped operation portion having a display portion provided on a first main surface, and a fitting hole integrally formed at a center portion of the operation portion on the second main surface side and into which the rotary operation shaft is fitted are formed. A boss portion, and a second positioning fitting portion in the axial direction formed inside the fitting hole so as to face the first positioning fitting portion, and the bottom of the fitting hole is A dial member configured as a reference surface that defines the amount of fitting by being abutted against the tip end surface of the rotary operation shaft,
In a state where the first positioning fitting portion and the second positioning fitting portion are engaged with each other, the dial member fits the rotary operation shaft into the fitting hole until its distal end surface abuts against the bottom portion. By doing so, it is positioned and fixed in the rotational direction and the fitting position is regulated and assembled.
In the operating part of the dial member, an identification opening is formed by cutting out the bottom corresponding to the second positioning fitting part and penetrating a part of the fitting hole. A dial device comprising an identification unit for identifying a fitting state between the positioning fitting part and the second positioning fitting part. The first positioning fitting portion is formed by forming the rotation operation shaft into a D-shaped cross section reaching the tip portion, and the fitting hole is formed inside by forming the D-shaped cross-section shaft hole shape. The dial device according to claim 1, wherein the second positioning fitting portion is configured. An axial fitting guide recess is formed in an outer peripheral portion of the rotary operation shaft facing the first positioning fitting portion, and the operating portion of the dial member is opened in communication with the fitting hole. Protruding into the penetrating part to form an axial fitting guide convex part,
The dial device according to claim 2, wherein the fitting guide protrusion is fitted into the fitting guide recess in a state where the rotary operation shaft is fitted into the fitting hole of the dial member. .

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