JP4588545B2 - Mounting structure of the rotary knob to the rotary shaft - Google Patents

Description

  The present invention relates to a rotating electronic component, and more particularly to a structure for attaching a rotary knob to a rotating shaft thereof.

  An example of a conventional structure for attaching the rotary knob to the rotary shaft will be described with reference to FIGS. FIG. 5 is an exploded perspective view showing an example of a structure for attaching a conventional rotary knob to a rotary shaft. A rotation switch is attached to the communication device 1 shown in FIG. 5, and the rotation shaft 2 is exposed to the outside.

  A D-cut 2b is formed on the rotating shaft 2, and a recess 2a is provided on the cylindrical surface of the portion that is not D-cut. First, a spacer 6 formed of an elastomer resin is fitted to the rotary shaft 2. The spacer 6 has a V-shaped ridge 6a formed on the entire outer periphery, and further, a claw 6b extending from the upper surface and a D-cut fitting portion 6c.

  The rotary knob 4 is fitted to the spacer 6 fitted to the rotary shaft 2 so as to be pushed from above. FIG. 6 shows a state in which the rotary knob 4 is fitted to the rotary shaft 2 via the spacer 6. An enlarged view of part A in FIG. 6 is shown in FIG.

  As shown in FIGS. 6 and 7, the D-cut 2b of the rotating shaft 2 and the D-cut fitting portion 6c of the spacer 6 are fitted, and the claw 6b is once elastically deformed and then returned to the dent 2a of the rotating shaft 2. Get in. Then, the V-shaped ridge 6 a of the spacer 6 is fitted into the V-shaped groove 4 a of the rotary knob 4 in a compressed state. The axial holding force and the rotating direction holding force between the spacer 6 and the rotating knob 4 are obtained by press-fitting the V-shaped protrusion 6 a of the spacer 6 and the V-shaped groove 4 a of the rotating knob 4.

  The rotational direction holding force between the rotating shaft 2 and the spacer 6 is obtained by fitting the D-cut 2b of the rotating shaft 2 and the D-cut fitting portion 6c of the spacer 6, and between the rotating shaft 2 and the spacer 6 The axial holding force is obtained by fitting the claw 6 b of the spacer 6 into the recess 2 a of the rotating shaft 2. A right-angled corner is formed at the upper end of the claw 6b. When this angle is engaged with the angle of the recess 2a, the axial holding force increases, and the axial holding between the rotating shaft 2 and the spacer 6 occurs. The force is larger than the axial holding force between the spacer 6 and the rotary knob 4.

  When the rotary knob 4 and the spacer 6 fitted as described above are removed from the rotary shaft 2, first, the rotary knob 4 is first pulled upward, the V-shaped ridge 6 a is elastically deformed, and the rotary knob 4 is removed from the spacer 6. remove. After that, the F6 direction force shown in FIG. 7 is applied to the claw 6b of the spacer 6 and the F6 direction force is applied to the spacer 6, and the claw 6b of the spacer 6 is removed from the recess 2a at the position indicated by the dotted line. Is pulled out of the rotary shaft 2.

  In this rotary knob mounting structure, a strong axial holding force between the rotary shaft 2 and the spacer 6 can be obtained. However, when the spacer 6 is removed from the rotary shaft 2, a force perpendicular to the shaft is applied to the claw 6b of the spacer 6. However, the spacer 6 has to be pulled out in the axial direction while adding, and there is a drawback that it is difficult to disassemble.

  In the conventional structure for attaching the rotary knob to the rotating shaft shown in FIG. 8 in which this defect is improved, the claw 7b of the spacer 7 is rounded up and down, and the inclined surface is provided above and below the recess 2a of the rotating shaft 2. Yes. The D cut 2 b of the rotating shaft 2 is fitted with the D cut fitting portion 7 c of the spacer 7. Other configurations are the same as those described with reference to FIGS.

  The structure of the rotary knob attached to the rotary shaft allows the spacer 7 to be detached from the rotary shaft 2 in a state where it is fitted to the rotary knob by simply pulling the rotary knob in one direction in the direction F2. In order to obtain an appropriate axial holding force by the claw 7b by molding, it is necessary to enlarge the claw 7b, resulting in a problem that the space efficiency is lowered. Also, fine adjustment to make the holding force moderate is difficult. Furthermore, the claw 7b of the spacer 7 may be scraped during disassembly.

In the fitting structure of the knob and the shaft proposed in Japanese Utility Model Publication No. 5-79615, a D-cut and a groove extending in the circumferential direction of the cylindrical surface are provided in the shaft, and the D-cut fitting portion provided in the knob is used as the D of the shaft. A hemispherical projection provided on the knob is fitted into the groove. This fitting structure of the knob and the shaft can be easily disassembled by simply pulling the knob in one direction. However, the protrusion of the knob may be scraped during disassembly.
Japanese Utility Model Laid-Open No. 5-79615, paragraph 0007, paragraph 0008, FIG.

  The present invention has been made in view of the above points, and the object is that the disassembly work is simple, a large axial holding force can be obtained, and the member can be scraped even after repeated disassembly. An object of the present invention is to provide a structure for attaching a rotary knob to a rotary shaft without any rotation.

Mounting structure of the rotating shaft of the rotary knob of the invention, attaching the rotary knob and the rotary knob a resin spacer is interposed to close fit between the rotating shaft of the rotary knob rotates the electronic component to the rotary shaft In the mounting structure, a concave portion having an upper edge surface substantially orthogonal to the central axis of the rotation shaft is provided in the cylindrical surface of the rotation shaft that is D-cut and the D-cut portion of the rotation shaft is not D-cut, and the resin spacer has the D-cut and A fitting portion of the resin spacer, a claw that is naturally separated from the recess of the rotating shaft, and an arc-shaped rib that is disposed on the outer peripheral side of the claw of the resin spacer, and the fitting portion of the resin spacer, After fitting the D-cut of the rotating shaft, a metal plate-like member having a substantially arcuate arcuate surface portion or a substantially flat plate-like flat surface portion and bent pieces bent substantially at right angles to both sides thereof, Insert between arc-shaped ribs The metal plate of arcuate ribs of the resin spacer with engaged closely fitted to the rotary knob to the resin spacer after the pawls is elastically deformed fitted into the recesses of the rotary shaft by the metal plate member The back portion when the member is inserted into the resin spacer is cut out .

Further, in the structure for attaching the rotary knob to the rotating shaft, a substantially spherical convex portion is provided on the substantially arc-shaped arc surface portion or the substantially flat plate-like flat surface portion of the metal plate member, and the convex portion is provided on the claw. The claw is elastically deformed by pressure contact .

Further, according to the structure of the present invention, the rotary knob is mounted on the rotary shaft by inserting a resin spacer in close contact with the rotary knob between the rotary knob and the rotary shaft of the rotating electronic component. In the mounting structure to be mounted, a concave portion having an upper edge surface substantially orthogonal to the central axis of the rotation shaft is provided in the cylindrical surface of the portion of the rotation shaft that is not D-cut with the rotation shaft being D-cut, and the resin spacer is provided with the D-cut A fitting portion of the resin spacer, a claw that is separated from the recess of the rotating shaft in a natural state, and an arc-shaped rib that is disposed on the outer peripheral side of the claw of the resin spacer. And a D-cut of the rotary shaft, and a substantially arc-shaped arc surface portion or a substantially flat plate-like plane portion and bent pieces bent at substantially right angles on both sides thereof, Arc surface or flat surface A metal plate member having a substantially spherical convex portion is inserted between the claw and the arc-shaped rib, and the convex portion of the metal plate member is pressed against the claw to elastically deform the claw. It fits into the recess of the rotating shaft .

Further, in the structure for attaching each rotary knob to the rotary shaft, the metal plate-like member is elastically deformed so that the upper surface of the claw is brought into contact with the upper edge of the recess of the rotary shaft. It is something to be made.
Further, in the structure for attaching each rotary knob to the rotary shaft, a V-shaped ridge or V-shaped groove is provided on the outer peripheral surface of the resin spacer, and a V-shaped groove or V-shaped ridge is provided on the inner peripheral surface of the rotary knob. When the rotary knob is closely fitted to the resin spacer, the V-shaped ridge or V-shaped groove of the spacer and the V-shaped groove or V-shaped ridge of the rotary knob are fitted, and the resin spacer A V-shaped ridge or V-shaped groove is compressed and deformed .

  The structure for attaching the rotary knob to the rotary shaft of the present invention is easy to disassemble and provides a large axial holding force. And even if it decomposes | disassembles repeatedly, a member is not shaved.

  The best mode for carrying out the present invention will be described below with reference to examples.

  1 is an exploded perspective view showing a structure for attaching a rotary knob to a rotary shaft according to Embodiment 1 of the present invention. A rotation switch is attached to the communication device 1 shown in FIG. 1, and the rotation shaft 2 is exposed to the outside. A D-cut 2b is formed on the rotating shaft 2, and a recess 2a is provided on the cylindrical surface of the portion that is not D-cut.

  First, a spacer 3 formed of an elastomer resin is fitted to the rotary shaft 2. The spacer 3 is formed with a V-shaped ridge 3a on the entire outer periphery, and further, a claw 3b extending from the upper surface and a D-cut fitting portion 3c are formed.

  The claw 3b is not fitted in the recess 2a of the rotating shaft 2 as shown in FIG. 2A in the natural state, but the metal plate member 5 is shown between the cylindrical rib 3d of the spacer 3 and the claw 3b. 1 and inserted in the direction of the arrow shown in FIG. 2A, it is elastically deformed in the direction shown by the arrow F3 in FIG.

  FIG. 3 shows a state in which the metal plate member 5 is inserted between the cylindrical rib 3d of the spacer 3 and the claw 3b. In FIG. 3, the upper planes of the spacer 3, the rotating shaft 2, and the metal plate member 5 are indicated by oblique lines. It should be noted that even in the same member, the direction of the oblique line is changed on the planes having different heights.

  As shown in FIG. 3, the metal plate member 5 has bent pieces 5b and 5b bent at right angles at both ends of the arcuate surface portion 5a abutting against the inner surfaces of the arcuate ribs 3d and 3d. The claw 3b is pressed. As shown in FIG. 2B, the upper surface of the claw 3b perpendicular to the side surface is in contact with the upper edge surface that is substantially orthogonal to the central axis of the recess 2a of the rotation shaft 2, so A large holding force in the axial direction can be obtained.

  Thus, the rotary knob 4 is fitted to the spacer 3 fitted to the rotary shaft 2 so as to be pushed from above. Although not visible in FIG. 1, a V-shaped groove 4a is provided on the inner surface of the rotary knob 4 in the same manner as the conventional one shown in FIG. Therefore, the V-shaped ridge 3 a of the spacer 3 is fitted in the compressed state in the V-shaped groove 4 a of the rotary knob 4. The axial holding force and the rotating direction holding force between the spacer 3 and the rotating knob 4 are obtained by press-fitting the V-shaped protrusion 3 a of the spacer 3 and the V-shaped groove 4 a of the rotating knob 4.

  The rotational direction holding force between the rotating shaft 2 and the spacer 3 is obtained by fitting the D-cut 2b of the rotating shaft 2 and the D-cut fitting portion 3c of the spacer 3 between the rotating shaft 2 and the spacer 3. The axial holding force is obtained by fitting the claw 3b of the spacer 3 into the recess 2a of the rotating shaft 2 as described above. Then, the holding force in the axial direction is increased by engaging the corner of the upper end of the claw 3b with the corner of the recess 2a, and the holding force in the axial direction between the rotating shaft 2 and the spacer 3 is It is larger than the axial holding force between.

  When removing the rotary knob 4 and the spacer 3 fitted as described above from the rotary shaft 2, first, the rotary knob 4 is first pulled upward to elastically deform the V-shaped ridge 3 a, so that the rotary knob 4 is removed from the spacer 3. remove. Thereafter, the metal plate member 5 is pulled out between the cylindrical rib 3d and the claw 3b.

  In order to facilitate removal of the metal plate member 5, a notch 3e is formed in the back surface of the metal plate member 5 of the cylindrical rib 3d as shown in FIG. When the metal plate member 5 is removed, the claw 3b becomes a natural state shown in FIG. Thus, the spacer 3 from which the claw 3b has been removed can be pulled out from the rotating shaft 2 lightly.

  Thus, in this rotary knob mounting structure, a strong axial holding force between the rotary shaft 2 and the spacer 3 can be obtained with the rotary knob attached, but when the spacer 3 is removed from the rotary shaft 2, It can be removed lightly and the nails will not be shaved.

  4A is a perspective view showing a metal plate-like member 5 used in the structure for attaching the rotary knob to the rotary shaft according to the second embodiment of the present invention, and FIG. 4B shows the rotary knob attached to the rotary shaft. It is a fragmentary longitudinal cross-section which shows an attachment structure.

  In this example, as shown in FIG. 4A, the metal plate-like member 5 is formed of a flat portion 5c and bent pieces 5b bent on both sides thereof, and a hemispherical convex portion 5d is formed on the flat portion 5c. Is provided. The metal plate member 5 is inserted between the cylindrical rib of the spacer similar to that of the first embodiment and the claw 3b.

  Then, as shown in FIG. 4B, the convex portion 5 d of the metal plate member 5 presses the claw 3 b of the spacer 3. The claw 3b enters the recess 2a of the rotary shaft 2 and a large holding force in the axial direction of the spacer 3 with respect to the rotary shaft 2 is obtained. Other configurations are the same as those of the first embodiment. In this example, since the claw 3b is held by the spherical convex portion 5d, the frictional force between the metal plate member 5 and the claw 3b of the spacer 3 is reduced, and the insertion and removal of the metal plate member 5 is facilitated.

  The embodiment is configured as described above, but the invention is not limited to this. For example, even if the convex portion 5d is not provided on the metal plate member 5 of the second embodiment, there is no burr at the lower end of the metal plate member 5. If the corner is smooth, the claw 3b of the spacer 3 is not scraped by the insertion / removal of the metal plate member 5, and the effect of the present invention can be obtained. Further, the hemispherical convex portion 5d may be provided on the metal plate member 5 of the first embodiment.

It is a disassembled perspective view which shows the attachment structure to the rotating shaft of the rotary knob which is Example 1 of this invention. FIG. 2A is a longitudinal sectional view showing a part of the mounting structure, and FIG. 2B is a longitudinal sectional view showing another state of the part. It is a top view shown excluding the one part member of the attachment structure to the rotating shaft of the rotation knob. 4A is a perspective view showing a member used for the structure for attaching the rotary knob to the rotary shaft according to the second embodiment of the present invention, and FIG. 4B shows the structure for attaching the rotary knob to the rotary shaft. It is a partial longitudinal cross-sectional view. It is a disassembled perspective view which shows the example of the attachment structure to the rotating shaft of the conventional rotary knob. It is a longitudinal cross-sectional view which shows the attachment structure. It is the A section enlarged view in FIG. It is a longitudinal cross-sectional view which shows the part of the other example of the attachment structure to the rotating shaft of the conventional rotary knob.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Communication apparatus 2 Rotating shaft, 2a Depression, 2b D cut 3 Spacer, 3a V-shaped protrusion, 3b Claw, 3c D cut fitting part 3d Arc-shaped rib, 3e Notch 4 Rotation knob, 4a V-shaped groove 5 Metal plate -Shaped member, 5a arcuate surface part, 5b bent piece, 5c plane part, 5d convex part 6 spacer, 6a V-shaped ridge, 6b claw, 6c D-cut fitting part 7 spacer, 7b claw, 7c D-cut fitting part

Claims (5)

In the mounting structure for attaching the rotary knob to the rotary shaft by interposing a resin spacer closely fitting with the rotary knob between the rotary knob and the rotary shaft of the rotary electronic component,
A concave portion having an upper edge surface substantially orthogonal to the central axis of the rotation shaft is provided on a cylindrical surface of the rotation shaft that is D-cut and the portion of the rotation shaft is not D-cut, and the resin spacer is fitted with the D-cut. A claw that is naturally separated from the recess of the rotation shaft, and an arc-shaped rib that is disposed on the outer peripheral side of the claw of the resin spacer, and the fitting portion of the resin spacer and the rotation shaft After fitting the D-cut, the metal plate-like member having a substantially arc-shaped arc surface portion or a substantially flat plate-like plane portion and bent pieces bent substantially at right angles to both sides thereof is used as the claw and the arc-shaped rib. The claw is elastically deformed by the metal plate-like member and fitted into the recess of the rotating shaft, and then the rotary knob is closely fitted to the resin spacer and the arc shape of the resin spacer The metal plate member of the rib is the resin Structure for mounting the rotation shaft of the rotary knob, wherein the portion behind was notch when it is plugged into pacer. The substantially spherical arc-shaped surface portion or the substantially flat plate-shaped flat surface portion of the metal plate member is provided with a substantially spherical convex portion, and the convex portion presses against the claw to elastically deform the claw. Mounting structure of the rotary knob on the rotating shaft. In the mounting structure for attaching the rotary knob to the rotary shaft by interposing a resin spacer closely fitting with the rotary knob between the rotary knob and the rotary shaft of the rotary electronic component,
A concave portion having an upper edge surface substantially orthogonal to the central axis of the rotation shaft is provided on a cylindrical surface of the rotation shaft that is D-cut and the portion of the rotation shaft is not D-cut, and the resin spacer is fitted with the D-cut. A claw that is naturally separated from the recess of the rotation shaft, and an arc-shaped rib that is disposed on the outer peripheral side of the claw of the resin spacer, and the fitting portion of the resin spacer and the rotation shaft After fitting the D-cut, a substantially arc-shaped arc surface portion or a substantially flat plate-like plane portion and bent pieces bent at substantially right angles on both sides thereof, the substantially arc-shaped arc surface portion or the substantially flat plate A metal plate-like member having a substantially spherical convex portion on the flat surface portion is inserted between the claw and the arc-shaped rib, and the convex portion of the metal plate-like member is pressed against the claw so that the claw is rotation knob, characterized in that is elastically deformed to fit into the recesses of the rotary shaft Mounting structure of the rotating shaft. The rotary knob according to any one of claims 1 to 3, wherein the claw is elastically deformed by the metal plate member and is fitted so that an upper surface of the claw contacts an upper edge portion of the recess of the rotation shaft. Mounting structure to the rotating shaft. When V-shaped ridges or V-shaped grooves are provided on the outer peripheral surface of the resin spacer, and V-shaped grooves or V-shaped ridges are provided on the inner peripheral surface of the rotary knob, and when the rotary knob is closely fitted with the resin spacer The V-shaped ridge or V-shaped groove of the spacer and the V-shaped or V-shaped groove of the rotary knob are fitted, and the V-shaped ridge or V-shaped groove of the resin spacer is compressed and deformed. 1. A structure for mounting the rotary knob described in any one of 1 to 4 on the rotary shaft.

Images