JP2012099459A - Attachment structure of operation knob, and electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attachment structure of an operation knob in which the operation knob is not detached from shaft easily.SOLUTION: The attachment structure of an operation knob includes: first regulation parts (14 and 3f)(KS) configured to select prohibition or permission of the movement of operation knobs (5, 5A, 5A1, and 5B) in the direction of the shaft lines (C) of shafts (3, 3A, 3AA, and 3B) by the presence or absence of the contact; and second regulation parts (3c and 13)(AN)(AN2) that regulate the movement of the operation knobs (5, 5A, 5A1, and 5B) in the direction of the shaft lines (C) of the shafts (3, 3A, 3AA, and 3B) by friction force in the tip parts of the shafts (3, 3A, 3AA, and 3B) and cause the shafts (3, 3A, 3AA, and 3B) to hold the operation knobs (5, 5A, 5A1, and 5B).

Description

  The present invention relates to an operation knob mounting structure and an electronic apparatus.

  As this type of technology, Patent Document 1 discloses a configuration in which an operation knob is fitted to a rotation operation shaft (shaft) of a rotation operation component such as a volume or an encoder.

JP 2005-30480 A

  In the configuration described in Patent Document 1, when an unintended force is applied to the operation knob in a direction away from the shaft, the operation knob may be easily detached from the shaft. For this reason, depending on the situation, there is a concern that the operation knob may be lost, and improvement is desired.

  Accordingly, an object of the present invention is to provide an operating knob mounting structure in which the operating knob is not easily detached from the shaft, and an electronic apparatus having the structure.

In order to solve the above problems, the present invention has the following configuration.
1) An operating knob mounting structure for holding the operating knob attached to the shaft,
Prohibition and allowance of movement of the operation knob (5, 5A, 5A1, 5B) in the direction of the axis (C) of the shaft (3, 3A, 3AA, 3B) is selected depending on the presence or absence of contact. A first regulating part (14, 14A, 14B, 3f) (KS, TS) configured;
Friction of the operation knob (5, 5A, 5A1, 5B) in the axial direction (C) direction of the shaft (3, 3A, 3AA, 3B) at the tip of the shaft (3, 3A, 3AA, 3B) A second restricting portion (3c, 13) (AN) (AN2) for restricting with force and holding the operation knob (5, 5A, 5A1, 5B) on the shaft (3, 3A, 3AA, 3B);
It is an attachment structure of an operation knob provided with.
2) The first restricting portion (14, 3f) (KS, TS) can select the allowance only when the restriction of the second restricting portion (3c, 10) (AN) is removed. It is the mounting structure of the operation knob as described in 1) comprised.
3) The second restricting portion (3c, 13) (AN) restricts the relative movement of the operation knob (5, 5A, 5A1) relative to the shaft (3, 3A, 3AA) in the rotational direction. ,
The first restricting portion (14, 3f) (KS, TS) is configured to move the operation knob (5, 5A, 5A1) in the axial direction of the shaft (3, 3A, 3AA). , 5A, 5A1), the operation knob mounting structure according to 1) or 2), wherein the structure is allowed by an operation accompanied by a rotation by a user.
4) Axial relative position of the operation knob (5, 5A, 5A1) and the shaft (3, 3A, 3AA) when allowed by the first restricting portion (14, 3f) (KS, TS) And an axial relative position between the operation knob (5, 5A, 5A1) and the shaft (3, 3A, 3AA) when being regulated by the second regulating portion (3c, 13) (AN) The operation knob mounting structure according to any one of 1) to 3), wherein the operation knobs are different from each other.
5) The shaft (3, 3A, 3AA) has a press-fit portion (3c) at the tip, and is orthogonal to the axis (C) of the shaft (3, 3A, 3AA) on the outer periphery or from the axis (C). A first regulating surface (3h, 3Afs) that is inclined toward the tip side of the shaft (3, 3A, 3AA) as it leaves is provided integrally or separately,
The operation knob (5, 5A, 5A1) has a housing space (13) for housing the pressed-in portion (3c) of the shaft (3, 3A, 3AA) and a second regulating surface (14a). The press-fitted portion (3c) is press-fitted into the housing space (13) and is attached to the tip of the shaft (3, 3A, 3AA), and the operation knob ( 5,5A, 5A1) attached,
The second restricting surfaces (14a, 14Au) are located farther from the press-fit portion (3c) than the first restricting surfaces (3h, 3Afs) and when viewed from the direction of the axis (C), The first restricting surface (3h, 3Afs) is provided at a position at least partially overlapping, and the second restricting surface (14a, 14Au) moves in the axial direction to move the first restricting surface (3h, 3Afs). ) And the axial direction of the shaft (3, 3A, 3AA) in the first restricting portion (14, 3f) (KS, TS) due to the abutment of the second restricting surface and the first restricting surface The operation knob mounting structure according to any one of 1) to 4), wherein the movement of the operation knob is prohibited.
6) A predetermined number of external threads (3f) are formed on the outer periphery of the shaft (3), and the first regulating surface (3h) is a flank surface (3h) of the external thread.
The operation knob (5) is formed with a claw portion (14) that can be screwed onto the male screw (3f) of the shaft (3), and the second restricting surface (14a) is formed on the claw portion (14). 5) The operation knob mounting structure according to 5).
7) In the axial direction of the shaft (3),
The shortest distance (L1) between the accommodation space (13) of the operation knob (5) and the second restriction surface (14a) is the press-fitted portion (3c) of the shaft (3) and the male screw ( The operating knob mounting structure according to 6), wherein the operating knob is set to be larger than the longest distance (L2) to 3f).
8) The first restricting portion (KS) moves the operation knob (5A, 5A1) in the axial direction of the shaft (3A, 3AA) and moves the shaft (3A) of the operation knob (5A, 5A1). , 3AA) is regulated by contact in a predetermined angular range around the axis line and allowed outside the predetermined angular range,
When the operation knob (5A, 5A1) is attached to the shaft (3A, 3AA), the operation knob (5A, 5A1) is moved by the first restricting portion (KS) to the shaft (3A, 3AA). 1) to 4) configured to be held on the shaft (3A, 3AA) by the second restricting portion (AN) after the movement in the axial direction of the shaft is allowed. This is a mounting structure of the operation knob.
9) The operation knob mounting structure according to 8), wherein the first restricting portion (AN) is restricted by contact at a plurality of positions in the axial direction of the shaft (3A, 3AA).
10) The shaft (3A, 3AA) has a press-fit portion (3c) at the tip portion, and has a missing portion (3Af1) that protrudes radially outward from the outer periphery and is partially missing in the circumferential direction. A convex part (3Af) is provided integrally or separately, and the operation knob (5A, 5A1) has an accommodation space (13) for accommodating the pressed-in part (3c) of the shaft (3A, 3AA). And a contact portion (14A) capable of contacting the convex portion (3Af) of the shaft (3A, 3AA) is formed, and the convex portion (3Af) and the contact portion (14A, 14B) The operation knobs (5A, 5A1) are prohibited from moving in the axial direction of the shaft (3A, 3AA) in the first restricting portion (AN) by the contact of ) Or the mounting structure of the operation knob according to any one of 8) to 9).
11) The distance (L2A) from the tip of the shaft (3A, 3AA) to the base side surface of the shaft (3A, 3AA) of the convex portion (3Af) is the accommodation space (13) and the contact portion ( 14A, 14B), the operating knob mounting structure according to 10), which is equal to or shorter than the shortest distance (L1A).
12) A plurality of the convex portions (3Af) are formed in the axial direction of the shaft (3A, 3AA), and the missing portion (3Af1, 3Af1, KS2) of at least two convex portions (KS1, KS2) among the plurality of convex portions. The operation knob mounting structure according to 10) or 11), wherein the relative positions in the circumferential direction are different in 3Af2).
13) Between the plurality of convex portions, the shaft (3A, 3AA) extends between the at least two convex portions (KS1, KS3) to restrict the circumferential movement of the contact portion (14A). Circumferential regulation part (KS4, KS5) is formed, the contact part (14A) via the arm part (11B) having flexibility to the outside in the radial direction of the shaft (3A, 3AA) The operation knob mounting structure according to 12), which is formed on the operation knob (5A1).
14) Of the plurality of convex portions, one convex portion (KS3) is formed in a position corresponding to at least the missing portion (3Af1) of the other convex portion (KS1) in the axial direction. The operation knob mounting structure according to 12) or 13), wherein:
15) The surface (3Afu) facing the tip side of the shaft (3A) in the convex portion (KS1) is formed so as to approach the root side of the shaft (3A) toward the missing portion (3Af1). The operation knob mounting structure according to any one of 10) to 14), wherein:
16) The first restricting portion (KS) moves the operation knob (5B) in the axial direction of the shaft (3B) and rotates it around the axis line, and moves the shaft (3B) of the operation knob (5B). ) By contact at a predetermined angular position around the axis of
The operation knob (5B) is configured such that the movement in the axial direction and the movement around the axial line are simultaneously regulated by the first regulating part (KS) and the second regulating part (AN2). The operation knob mounting structure according to 1), which is held by a shaft (3B).

17) An operating knob mounting structure for holding the operating knob attached to the shaft,
The shaft (3, 3A, 3AA) has a press-fit portion (3c) at the tip, and the outer periphery of the shaft (3, 3A, 3AA) is orthogonal to the axis (C) of the shaft (3, 3A, 3AA) or away from the axis (C). A first regulating surface (3h, 3Afs) inclined toward the tip side of the shaft (3, 3A, 3AA) is provided integrally or separately;
The operation knob (5, 5A, 5A1) has an accommodation space (13) for accommodating the press-fit portion (3c) of the shaft (3, 3A, 3AA) and has a second restriction surface (14a, 14Au). Formed,
The press-fit portion (3c) is press-fitted into the housing space (13) and is attached to the tip of the shaft (3, 3A, 3AA), and the operation knob (5 , 5A, 5A1) attached,
The second restricting surfaces (14a, 14Au) are located farther from the press-fit portion (3c) than the first restricting surfaces (3h, 3Afs) and when viewed from the direction of the axis (C), The operating knob mounting structure is characterized in that it is provided at a position at least partially overlapping the first regulating surface (3h, 3Afs).
18) An operating knob mounting structure for holding the operating knob attached to the shaft,
The shaft (3A, 3AA) has a press-fit portion (3c) at the tip portion, and protrudes in a bowl shape radially outward from the outer periphery, and a convex portion having a missing portion (3Af1) partially missing in the circumferential direction ( 3Af) is provided integrally or separately,
The operation knob (5A, 5A1) has a housing space (13) for housing the pressed-in portion (3c) of the shaft (3A, 3AA) and the convex portion (3Af) of the shaft (3A, 3AA). A contact portion (14A) that can be contacted to the housing space (13), the press-fitted portion (3c) is press-fitted into the housing space (13) and attached to the tip of the shaft (3A, 3AA); In addition, the movement of the operation knob (5A, 5A1) in the axial direction of the shaft (3A, 3AA) is prohibited by the contact between the convex portion (3Af) and the contact portion (14A). It is a mounting structure of a characteristic operation knob.

19) The operation knob mounting structure according to any one of 1) to 18) is provided,
An electronic device characterized in that the electrical characteristics are changed by rotation of the shaft (3, 3A, 3AA, 3B), or the electrical characteristics are different.

  According to the present invention, there is an effect that the operation knob is not easily detached from the shaft.

It is a perspective view for demonstrating the Example of the electronic device of this invention. It is a disassembled perspective view for demonstrating Example 1 of the attachment structure of the operation knob of this invention. It is a perspective view of the principal part for demonstrating Example 1 of the attachment structure of the operation knob of this invention. It is a longitudinal cross-sectional view for demonstrating Example 1 of the attachment structure of the operation knob of this invention. It is a longitudinal cross-sectional view for demonstrating Example 1 of the attachment structure of the operation knob of this invention, Comprising: It is a figure which shows the state before attaching an operation knob to a shaft. It is a longitudinal cross-sectional view for demonstrating Example 1 of the attachment structure of the operation knob of this invention, Comprising: It is a figure which shows the 1st state in the middle of attaching the operation knob to a shaft. It is a longitudinal cross-sectional view for demonstrating Example 1 of the attachment structure of the operation knob of this invention, Comprising: It is a figure which shows the 2nd state in the middle of attaching the operation knob to a shaft. FIG. 3 is a longitudinal sectional view for explaining the first embodiment of the operation knob mounting structure of the present invention, in a third state in the middle of attaching the operation knob to the shaft, and the press-fitting portion between the shaft and the operation knob by an external force or the like. It is a figure which shows the state which remove | deviated. It is a longitudinal cross-sectional view for demonstrating Example 1 of the attachment structure of the operation knob of this invention, Comprising: It is a figure which shows the state which attached the operation knob to the shaft. It is sectional drawing for demonstrating Example 2 of the attachment structure of the operation knob of this invention. It is another figure explaining Example 2 of the attachment structure of the operation knob of this invention. It is a fragmentary perspective view for demonstrating the modification 1 in Example 2 of the attachment structure of the operation knob of this invention. It is the perspective view and sectional drawing for demonstrating the modification 2 in Example 2 of the attachment structure of the operation knob of this invention. It is sectional drawing for demonstrating the modification 2 in Example 2 of the attachment structure of the operation knob of this invention. It is the perspective view and sectional drawing for demonstrating the modification 2A in Example 2 of the attachment structure of the operation knob of this invention. It is a fragmentary perspective view for demonstrating another form of the modification 2 in Example 2 of the attachment structure of the operation knob of this invention. It is a disassembled perspective view for demonstrating Example 3 of the attachment structure of the operation knob of this invention. It is sectional drawing for demonstrating Example 3 of the attachment structure of the operation knob of this invention. It is a fragmentary perspective view for demonstrating the modification in Example 3 of the attachment structure of the operation knob of this invention.

FIG. 1 shows an embodiment of an electronic apparatus according to the present invention.
The electronic device of the embodiment is a wireless device KM. For example, the wireless device KM is a handy transceiver.
The wireless device MK includes a rotation operation unit 1 having an operation knob 5 and an antenna Ma on the top surface.
A chassis 15 (see FIG. 4) (not shown) is housed inside the wireless device MK. The rotation operation unit 1 and the antenna Ma are directly or indirectly supported by the chassis 15.

As shown in FIG. 2, the rotation operation unit 1 includes a volume 2, a shaft 3, a nut 4, and an operation knob 5.
Hereinafter, a preferred embodiment of the operation knob mounting structure will be described by taking the rotary operation unit 1 as an example.

<Example 1>
In Embodiment 1 of the operation knob mounting structure, in addition to the press-fitting portion between the operation knob and the shaft, a screw portion is provided on one side of the shaft and the operation knob, and this screw is moved when the operation knob is linearly moved in the axial direction. A claw portion that is in contact with the portion and whose movement is restricted is provided on the other side, and the claw portion can pass through the screw portion by rotating the operation knob in a state of being removed from the press-fitting portion. Hereinafter, each member will be described in detail.

(Volume 2)
The volume 2 includes a volume main body 2a and a male screw portion 2b for attaching the chassis. The volume main body 2a accommodates a variable resistor. The male screw portion 2b is a cylinder formed so as to protrude from the volume main body 2a. A male screw 2c is formed on the outer periphery of the male screw portion 2b.

(Shaft 3)
The shaft 3 is rotatably supported by the volume 2. The shaft 3 includes a portion to be accommodated 3a and an exposed portion 3b.
The accommodated part 3 a is accommodated in the volume 2.
The exposed portion 3b extends from the male screw portion 2b upward in FIG. 2 and is exposed to the outside.
The exposed part 3b has a press-fit part 3c and an extension part 3d.
The press-fit portion 3 c is press-fitted into the operation knob 5.
The press-fit portion 3 c is formed on the tip side of the shaft 3.
The press-fit portion 3c has a shape in which a part of the “D” shape of the alphabet is missing when viewed along the axis C of the shaft 3, that is, in plan view (so-called D cut).
A male screw portion 3f for preventing the operation knob 5 from coming off is formed on the outer peripheral surface 3e of the extension portion 3d.
The male screw portion 3f is formed in the vicinity of the press-fit portion 3c.
The thread of the male screw portion 3f has an upper flank surface 3g and a lower flank surface 3h (see FIG. 4).
The upper flank surface 3g is a flank surface that faces the press-fit portion 3c side (the upper side in FIG. 4) of the thread of the male screw portion 3f. The lower flank surface 3h is a flank surface facing the accommodated portion 3a side (the lower side in FIG. 4) of the thread of the male screw portion 3f.
Specifically, the upper flank surface 3 g is a slope extending away from the chassis 15 toward the axis C of the shaft 3.
On the other hand, the lower flank surface 3 h is an inclined surface extending so as to approach the chassis 15 toward the axis C of the shaft 3 or a surface orthogonal to the axis C.

That is, in the cross-sectional view of FIG. 4, the angle θ formed by the first direction E defined as the direction orthogonal to the lower flank surface 3h and away from the lower flank surface 3h and the axis C of the shaft 3 is 0. More than 90 degrees and less than 90 degrees.
In the present embodiment, the angle θ is an acute angle, and θ is, for example, about 45 °.
The angle θ is desirably 0 ° or close to 0 °. The reason for this will be described later.
The shaft 3 is made of a metal material.
The material of the shaft 3 is not limited to metal, and may be a resin material. In the case of a resin material, a high-strength fiber reinforced resin is more preferable.

(Nut 4)
A nut 4 shown in FIG. 2 is a nut that is screw-coupled to the male screw 2 c of the male screw portion 2 b for attaching the chassis of the volume 2.
As shown in FIG. 4, the rotation operation unit 1 is attached to the chassis 15 so that the chassis 15 is sandwiched between the nut 4 and the volume main body 2a.

(Knob 5)
As shown in FIGS. 2, 4, etc., the operation knob 5 includes a knob body 6 and a D spring 7.
The D spring 7 is a ring shape having a D-shaped cross section and an axial slit, and is formed so as to exhibit a radial elastic repulsive force.
The D spring 7 is press-fitted into a fitting hole 6k (see FIG. 4) provided in the knob main body 6 and urges the shaft 3 inserted inside in the diameter reducing direction so that the knob main body 6 is moved to the shaft 3. On the other hand, it is fitted in a press-fitted state. A D-cut portion of the shaft 3 is inserted into the D spring 7.

The knob body 6 is a resin knob.
As shown in FIGS. 3 and 4, the knob body 6 is formed in a cup shape with a bottomed cylinder.
The knob body 6 includes a cylindrical portion 8 that a user picks with a finger, a lid portion 9 that closes one end of the cylindrical portion 8, a D spring accommodating portion 10, and a plurality of arm portions 11. . In the embodiment, three arm portions 11 are provided.
The cylinder portion 8, the lid portion 9, the D spring accommodating portion 10, and the arm portion 11 are integrally formed.
The cylinder portion 8 and the lid portion 9 form a predetermined space 12 inside the knob body 6.
The D spring accommodating portion 10 and the arm portion 11 are disposed in the space 12.
The arm part 11 has an arm shape.
When the knob body 6 is formed by injection molding and no opening is provided in the lid portion 9, the arm portion 11 becomes a so-called undercut portion.
In this case, using the flexibility of the arm part 11, the arm part 11 is taken out from the mold while being bent (so-called muli stitching).
If an opening is provided at a position corresponding to the arm portion 11 of the lid portion 9, the undercut can be avoided, and the knob body 6 can be taken out of the mold in a so-called order without bending the arm portion 11.

The D spring accommodating portion 10 accommodates and holds the D spring 7 in a press-fit manner.
The D spring accommodating portion 10 is formed to be connected to the lid portion 9.
A housing space 13 is formed in the D spring 7 for housing and holding the press-fit portion 3 c in the exposed portion 3 b of the shaft 3.

The arm portion 11 is connected to the D spring accommodating portion 10 and extends in a direction away from the lid portion 9.
A claw portion 14 is formed at the distal end portion 11 a of the arm portion 11.
Specifically, the claw portion 14 is connected to the distal end portion 11 a of the arm portion 11 and is formed to protrude from the distal end portion 11 a of the arm portion 11 toward the axis C of the shaft 3.
The claw portion 14 is formed in a shape that tapers toward the tip of the claw portion 14.
For example, the shape corresponds to the shape of the thread of the male screw portion 3f.
The claw portion 14 is screwed into the male screw portion 3f.
The nail | claw part 14 has the back side inclined surface 14a and the near side inclined surface 14b.
The back side inclined surface 14a faces the lid portion 9 side.
The back side inclined surface 14 a is formed as an inclined surface that approaches the chassis 15 as it goes toward the axis C of the shaft 3.
More specifically, the back-side inclined surface 14a is provided at a position that opposes the lower flank surface 3h of the thread of the external thread portion 3f of the shaft 3 and interferes in the direction of the axis C.
On the other hand, the front side inclined surface 14 b faces the side opposite to the lid portion 9.
The front side inclined surface 14 b is formed as an inclined surface that is separated from the chassis 15 toward the axis C of the shaft 3.
The back side inclined surface 14 a is an inclined surface on the back side as viewed from the opening of the knob body 6 among the inclined surfaces formed in the claw portion 14.
The front side inclined surface 14 a is an inclined surface on the front side as viewed from the opening of the knob body 6 among the inclined surfaces formed on the claw portion 14.
The claw portions 14 of the plurality of arm portions 11 of the knob body 6 are formed so as to be screwed together and spirally movable along the thread of the male screw portion 3 f of the shaft 3.
That is, the position of each claw portion 14 in the direction of the axis C depends on the pitch of the male screw of the male screw portion 3f and the position of the claw portion 14 around the axis C. It is decided to match.

As shown in FIG. 5, in the direction of the axis C, the shortest distance L1 among the distances between the shaft housing space 13 of the D spring 7 of the operation knob 5 and the plurality of claws 14 in the operation knob 5 is The press-fitted portion 3 c and the male screw portion 3 f of the shaft 3 are set so that they can be simultaneously accommodated in the space between the claw portion 14 side end of the accommodation space 13 and the claw portion 14.
In other words, the total length L2 of the tip of the press-fit portion 3c of the shaft 3 and the lower end of the male screw portion 3f in the direction of the axis C of the shaft 3 is equal to or less than the distance L1.
Since each part has a width in the direction of the axis C, more specifically, the shortest distance between the accommodation space 13 of the operation knob 5 and the claw part 14 is between the press-fit part 3c of the shaft 3 and the male screw part 3f. It is set to be larger than the longest distance.
With this setting, the operation knob 5 and the shaft necessary for fitting the pressed-in part 3c into the accommodating space 13 of the D spring 7 of the operation knob 5 after the claw part 14 exceeds the male screw part 3f. 3 can be secured.

Next, an assembling method of the rotation operation unit 1 will be described with reference to FIGS.
In the first embodiment, the position of the plurality of claw portions 14 in the direction of the axis C may be set to a position that can be screwed into the female screw of the female screw portion 3f. For example, depending on the lead angle or the like of the female screw, the positions of the claw portions 14 in the direction of the axis C are displaced in the direction of the axis C (see FIG. 7).
Moreover, the arm part 11 shown by FIGS. 3-8 etc. is described suitably so that it may be understood that it has flexibility, About the arm length of the arm part 11, the length of the axis C direction is set. It is not limited.

First, as shown in FIG. 5, the male screw portion 2 b for mounting the chassis of the volume 2 is inserted into the mounting hole 15 a of the chassis 15. Next, the ring nut 4 is screwed into the male screw portion 2b so as to sandwich the chassis 15 and tightened.
As a result, the volume 2 is fixed to the chassis 15.

Next, as shown in FIG. 6, the operation knob 5 is placed on the shaft 3 that is rotatably supported by the volume 2.
Thereby, the near side inclined surface 14 b of the claw portion 14 of the arm portion 11 of the knob body 6 comes into contact with the upper flank surface 3 g of the male screw portion 3 f of the shaft 3.

Next, in the state of FIG. 6, the operation knob 5 is rotated clockwise with respect to the shaft 3 when viewed from the upper side of FIG.
Then, as shown in FIG. 7, the claw portion 14 is screwed into the thread of the male screw portion 3f and spirally moved. As a result, the claw portion 14 exceeds the male screw portion 3f as shown in FIG.

Next, in the state of FIG. 8, the operation knob 5 and the shaft 3 are positioned at a relative position around the axis C so that the press-fitted portion 3 c of the shaft 3 fits in the accommodating space 13 of the D spring 7 of the operation knob 5. With care, push the operation knob 5 toward the chassis 15.
As a result, as shown in FIG. 9, the press-fit portion 3 c of the shaft 3 is press-fitted into the accommodation space 13 of the D spring 7 of the operation knob 5, so that the operation knob 5 is inserted into the tip of the shaft 3 (press-fit portion 3 c). It is attached.
In this attached state, if the lower flank surface 3h is the first restricting surface and the back inclined surface 14a is the second restricting surface, the second restricting surface is located farther from the press-fit portion 3c than the first restricting surface. In the direction of the axis C, it is provided at a position that interferes with the first restriction surface.

  Next, with reference to FIGS. 8 and 9, a method of using the rotation operation unit 1 will be described.

In general, the operation knob 5 is preferably detachable from the shaft 3 during maintenance service.
This is because, as long as the operation knob 5 is an exposed part, it may become dirty or damaged during repeated use, and it is a part that is to be replaced with a new one as necessary.
Therefore, it is desirable that the press-fit portion 3c of the shaft 3 is press-fitted with a strength that can be attached to and detached from the D spring 7 of the operation knob 5.

On the other hand, for example, it is assumed that the user slips the hand and drops the wireless device KM, and the impacted portion 3a of the operation knob 5 is detached from the D spring 7 due to the impact.
Alternatively, when the user tries to lift the wireless device KM by picking up the knob 5 in an emergency situation, the wireless device KM is caught in a pocket or the like, and the pressed-in portion 3a of the operation knob 5 is detached from the D spring 7. Suppose you have.
This state is shown in FIG. FIG. 8 also shows a state in which the operation knob 5 has been removed from the press-fit portion 3c due to an unintended removal force applied from the outside.

  Even in a state beyond these normal use states, as shown in FIG. 8, the shaft 3 has the lower flank surface 3 h of the male screw portion 3 f of the shaft 3 and the rear side inclined surface 14 a of the claw portion 14 of the operation knob 5. Are caught (abut), so that they cannot be completely removed from the internal space 12 of the knob body 6 of the operation knob 5.

On the other hand, in order to intentionally remove the operation knob 5 from the shaft 3, in the state shown in FIG. 8, the operation knob 5 is slightly pulled away from the chassis 15 and viewed from the upper side of FIG. Rotate it counterclockwise.
According to this example, the operation knob 5 is not easily detached from the shaft 3. Further, the operation knob 5 can be easily attached to and detached from the shaft 3, and can be repeated any number of times.

  The preferred embodiment of this embodiment has been described above. In short, the above-described embodiment has the following features.

That is, as shown in FIGS. 2 to 4, the rotation operation unit 1 includes a volume 2 (rotary knob body) and a shaft 3 (shaft) that is rotatably supported by the volume 2 and has a press-fit portion 3 c at the tip. An accommodation space 13 for accommodating the press-fit portion 3c of the shaft 3 is formed, and an operation knob 5 (knob component) attached to the tip of the shaft 3 by press-fitting the press-fit portion 3c into the storage space 13 is provided. ing.
A lower flank surface 3 h (first restriction surface) is formed on the outer peripheral surface 3 e (outer periphery) of the shaft 3.
The first direction E is defined as a direction orthogonal to the lower flank surface 3h and away from the lower flank surface 3h, and an angle θ formed by the first direction E and the axis C of the shaft 3 is 0 ° or more and 90 °. Is less than.
The operation knob 5 is formed with a back side inclined surface 14a.
The back side inclined surface 14a is provided at a position facing the lower flank surface 3h of the thread of the male thread portion 3f of the shaft 3 and interfering in the direction of the axis C.

  In this embodiment, even if the press-fitted portion 3c of the shaft 3 comes out of the accommodating space 13 of the operation knob 5 for some reason, if the operation knob 5 is further removed from the shaft 3, the shaft 3 Since the lower flank surface 3h and the back-side inclined surface 14a of the operation knob 5 are hooked (abut) with each other, the operation knob 5 is difficult to be detached from the shaft 3.

As shown in FIGS. 2 to 4, a male screw portion 3 f for retaining the shaft 3 is formed on the outer peripheral surface 3 e (outer periphery) of the shaft 3.
The lower flank surface 3h is formed as a thread flank surface in the male screw portion 3f for retaining. The operation knob 5 is formed with a claw portion 14 that can be spirally moved along a thread (valley) of the male screw portion 3 f of the shaft 3.
The back side inclined surface 14 a is formed in the claw portion 14.

  According to this embodiment, the configuration in which the operation knob 5 can be detached from the shaft 3 as necessary is realized while the above-described effect that the operation knob 5 is hardly detached from the shaft 3 is exhibited.

Further, as shown in FIG. 5, in the direction of the axis C of the shaft 3, the distance L1 between the accommodation space 13 of the operation knob 5 and the claw portion 14 is such that the press-fit portion 3c and the male screw portion 3f of the D shaft 3 However, it is set so that it can be simultaneously accommodated between the shaft housing space 13 and the claw portion 14 of the operation knob 5.
With this configuration, this embodiment allows the press-fit portion 3c of the shaft 3 to be press-fitted straight into the accommodation space 13 of the operation knob 5 without rotation.
Therefore, the press-fit portion 3c of the shaft 3 can be formed in a so-called D-cut shape.
Further, the claw portion 14 and the male screw portion 3f constitute a first restricting portion. The press-fit portion 3c and the accommodation space 13 constitute a second restricting portion.

  The said embodiment can be changed as follows, for example.

  That is, the rotation operation unit 1 is not limited to the volume, and the above technical idea can be applied to channel switching, a rotary switch, and the like.

  Further, the technique for forming the arm portion 11 of the knob body 6 of the operation knob 5 is not particularly limited, and for example, so-called punching that is forcibly pulled out from the mold can be employed.

Further, the lower flank surface 3h of the male screw portion 3f of the shaft 3 shown in FIG. 4 and the rear side inclined surface 14a of the claw portion 14 of the arm portion 11 of the knob body 6 of the operation knob 5 are inclined obliquely in the above embodiment. It ’s not necessary to be inclined.
That is, the lower flank surface 3 h and the back side inclined surface 14 a may be formed so as to be orthogonal to the axis C of the shaft 3. In this case, the angle θ is 0 °.

  Although the arm part 11 was demonstrated as three places, one place may be sufficient and two places may be sufficient. Two or more claw portions 14 may be formed on one arm portion 11.

  The claw portion 14 may be formed in a cylindrical inner surface shape, for example, without being formed into a shape that is screwed into the thread of the male screw portion 3f in advance. In this case, the inner diameter of the claw portion 14 is formed to be smaller than the thread diameter of the male thread portion 3f and larger than the valley diameter. In this example, when the operation knob 5 is mounted on the shaft, it is mounted like a so-called tapping screw while cutting the female thread on the claw portion 14.

The male screw portion 3 f may not be formed integrally with the shaft 3.
A ring member having a shape corresponding to the male screw portion 3f may be formed of a resin material or the like, a reduced diameter portion may be formed at a predetermined position of the shaft 3, and the ring member may be fitted.

  The relationship between the male screw portion 3f and the claw portion 14 in the embodiment is reversed, the arm portion 11 is formed wide and a female screw is formed in advance, and the male screw portion 3f of the shaft 3 is simply replaced with the female screw formed on the arm portion 11. You may form in the shape of a nail | claw which can be screwed together.

Instead of the male screw portion 3f or the female screw portion, a peripheral rib or a groove having a cross-sectional thread shape that is not a screw may be formed as a counterpart to be engaged with the claw portion 14.
A mark corresponding to the D shape in the accommodation space 13 of the D spring 7 may be provided on the upper surface or the side surface of the operation knob 5.
According to this example, the user can know the position of the D shape in the accommodation space 13 even after the claw portion 14 has passed the male screw portion 3 f by rotating the operation knob 5 by the user.
Accordingly, if the user confirms the position of the D cut of the press-fit portion 3c of the shaft 3 before the operation knob 5 is put on the shaft 3, the operation knob can be easily operated even after the operation knob 5 is rotated by screwing. 5 and the relative position of the shaft 3 around the axis C can be known.
Therefore, the user can easily push the operation knob 5 toward the chassis 15.

<Example 2>
In the second embodiment of the operation knob mounting structure, the operation knob 5A and the shaft 3A are fitted, and the linear movement of the operation knob 5A with respect to the shaft 3A in the direction of the axis C is restricted by the frictional force and the rotation about the axis C is performed. In addition to the press-fit portion AN that restricts the engagement by the engagement shape, a movement restricting portion KS formed of a concave portion or a convex portion is provided on either one of the operation knob 5A and the shaft 3A, and the operation knob 5A is linearly moved in the axis C direction A contact portion TS composed of a convex portion or a concave portion that abuts against the movement restricting portion KS and restricts its movement in a circumferential range other than a predetermined relative circumferential position when being moved is provided on the other side. .
This is a structure in which the claw portion 14A passes through the movement restricting portion KS and can be detached from the shaft 3A only when the operation knob 5A is removed from the press-fit portion AN and set to a predetermined relative circumferential position.
In the following, portions different from the first embodiment will be mainly described.

FIG. 10 shows a state before the operation knob 5A is attached to the shaft 3A in the second embodiment.
The shaft 3A is provided with a movement restricting portion KS.
The movement restricting portion KS is a convex portion 3Af that protrudes in a hook shape from the outer surface of the shaft 3A to the radially outer side.

FIG. 11 is a view of the shaft 3A as viewed from the upper side in FIG.
As shown in FIG. 11, 3Af has a missing portion 3Af1 that does not protrude in the range of the width W11 at two positions that are shifted by a predetermined angle in the circumferential direction.
In FIG. 11, the pair of missing portions 3Af1 are at positions shifted by 180 °.
On the other hand, as shown in FIG. 10, the operation knob 5A is provided with a contact portion TS.

The contact portion TS is a pair of claw portions 14A provided so as to protrude toward the shaft at two positions shifted by a predetermined angle around the axis C. The predetermined angle is set to be the same as the shift angle of the missing portion 3Af1. That is, in FIG. 10, the predetermined angle is 180 °.
The width of the claw portion 14A (the distance in the front and back direction in FIG. 10) is less than the width W11.
Accordingly, the operation knob 5A allows the claw 14A of the contact portion TS to pass through the missing portion 3Af1 of the restricting portion KS and move in the axis C direction only at a predetermined position around the axis C with respect to the shaft 3A. .
In this example, the predetermined positions are two positions shifted by 180 °.
In a position (angle range) other than a predetermined position around the axis C, the lower surface 14As of the claw portion 14A contacts the upper surface 3Afu of the convex portion 3Af when the operation knob 5A moves from the upper side to the lower side in FIG. Movement is restricted.
Further, in the movement of the operation knob 5A from the lower side to the upper side in FIG. 10, the upper surface 14Au of the claw portion 14A comes into contact with the lower surface 3Afs of the convex portion 3Af, and the movement is restricted.
The number of the claw portions 14A is less than or equal to the number of the missing portions 3Af1, and when a plurality of claw portions 14A are provided, the circumferential relative position of each claw portion 14A is relative to the circumferential position of each missing portion 3Af1. And at least one place may be formed.

Returning to FIG. The press-fit portion AN is composed of a press-fit portion 3 c and a D spring 7.
In the direction of the axis C, the shortest distance L1A among the distances between the shaft housing space 13 of the D spring 7 of the operation knob 5A and the plurality of claw parts 14A of the operation knob 5 is the press-fit portion of the shaft 3. 3c and convex part 3Af are set so that it can be simultaneously accommodated in the space between the nail | claw part 14 side end of accommodation space 13, and claw part 14A.
That is, the distance L2A from the tip of the shaft 3A to the lower surface 3Afs of the convex portion 3Af is not more than the distance L1A.
By setting as described above, the operation knob 5A necessary for fitting the pressed-in part 3c into the accommodating space 13 of the D spring 7 of the operation knob 5A after the claw part 14A exceeds the convex part 3Af. A relative movable range with the shaft 3 can be secured.
A method for the operator to attach the operation knob 5A to the shaft 3A will be specifically described.
The operator first pushes the operation knob 5A over the shaft 3A. Then, in many cases, the claw portion 14A comes into contact with the upper surface 3Afu of the convex portion 3Af and the pushing is restricted.
Here, the operator rotates the operation knob 5A around the axis 3C while urging the operation knob 5A in the pushing direction.
When the circumferential position of each claw portion 14A coincides with the circumferential position of each missing portion 3Af1 by this rotation, the claw portion 14A passes through the missing portion 3Af1 and the operation knob 5A places the press-fit portion 3c in the accommodating space 13. It is pushed to the position where it can be press-fitted.
When the claw portion 14A is in a position where it passes through the missing portion 3Af1 by the initial push-in, the claw portion 14A does not contact the upper surface 3Afu. Therefore, the operator holds the operation knob 5A as it is in the press-fitting portion 3c. It can be pushed to the position where it can be press-fitted.
Next, the operation knob 5A is rotated around the axis C, and the press-fitted part 3c of the operation knob 5A is press-fitted into the receiving space 13 at a circumferential position where the press-fitted part 3c can be press-fitted into the receiving space 13 of the D spring 7. .
When the operator pulls out the operation knob 5A from the shaft 3A, the operator presses the operation knob 5A in the pulling direction after removing the press-fitted portion from the housing space 13 in the D spring 7 and rotates around the axis C. Turn to.
In this rotation, when the circumferential position of each claw portion 14A coincides with the circumferential position of each missing portion 3Af1, the claw portion 14A passes through the missing portion 3Af1 and the operation knob 5A is pulled out from the shaft 3A.
The width, position, and number of the missing portions 3Af1 and 3Af2 can be freely set.
With these settings, the number or position of the operation knob 5A that permits passage of the restricting portion KS around the axis C (hereinafter also referred to as an allowable position) and an angle range (hereinafter also referred to as an allowable angle range) are one or more. Can be any number and any angular range.
By shifting the position around the axis C where the press-fitted portion 3c of the operation knob 5 can be press-fitted into the accommodation space 13, and the allowable position and the allowable angle range, the separation of the operation knob 5A from the shaft 3A is made more effective. Can be prevented.

As a modification of the second embodiment, a plurality of regulating portions KS may be provided side by side in the axis C direction.
FIG. 12 is a perspective view illustrating an example in which two restriction portions KS are provided as a first modification (hereinafter, a first modification) of the second embodiment.

As shown in FIG. 12, the restricting portion KS includes an upper restricting portion KS1 on the tip side of the shaft 3A and a lower restricting portion KS2 located on the root side from the upper restricting portion KS1 of the shaft 3A.
The positions around the axis C of the missing portion 3Af1 of the upper restricting portion KS1 and the missing portion 3Af2 of the lower restricting portion KS2 are different.

When attaching the operation knob 5A to the shaft 3A, first, the operator rotates the operation knob 5A (see FIG. 10) about the axis C to move the claw part 14A to the position of the missing part 3Af1 (first allowable position). And push in that posture.
Accordingly, the claw portion 14A passes through the missing portion 3Af1 of the upper restricting portion KS1.
Further, the operator pushes the operation knob 5A, rotates it about the axis C, aligns the claw portion 14A with the position of the missing portion 3Af2 (second allowable position), and pushes in at that position.
Accordingly, the claw portion 14A passes through the missing portion 3Af2 of the lower restricting portion KS1.
Extracting the operation knob 5A from the shaft 3A is performed in the reverse procedure.
Each dimension is set so that, when the operation knob 5A is attached, after the claw portion 14A passes through the upper restricting portion KS1 and the lower restricting portion KS2, press-fitting of the press-fit portion 3c into the accommodation space 13 is started.
That is, the distance L2B from the tip of the shaft 3A to the lower surface of the lower restricting portion KS2 (the surface far from the tip of the shaft 3A) is equal to or less than the distance L1A.
By providing a plurality of restricting portions KS, each allowable position (first and second allowable positions) or each allowable angle range of the operation knob 5A for allowing the restricting portions KS1 and KS2 to pass can be set differently. It is possible to more effectively prevent the operation knob 5A from being detached from the shaft 3A.

13 and 14 are diagrams for explaining a second modification (hereinafter, a second modification) of the second embodiment. The operation knob 5A1 of Modification 2 will be described with reference to FIGS.
FIG. 13A is a partial perspective view of the shaft 3A of the second modification, and FIG. 13B is a cross-sectional view taken along line S13-S13 in FIG. S13-S13 sectional drawing is sectional drawing which looked at the cross section which cut | disconnected the position where the upper control part KS1 of shaft 3A and the lower control part KS3 were formed in the plane orthogonal to the axis | shaft C from the front end side of the shaft 3A. .
FIG. 14 is a cross-sectional view (cross-sectional view of S14-S14 in FIG. 10) showing the claw portion 14B in the operation knob 5A1 of the second modification. S14-S14 sectional drawing is sectional drawing which looked at the cross section which cut | disconnected arm part 11B of knob 5A1 by the plane orthogonal to the axis | shaft C from the back side of knob 5A1.

The modification 2 has the upper restriction part KS1, the lower restriction part KS3, and a pair of circumferential direction restriction parts KS4 and KS5 that connect both restriction parts in the direction of the axis C as the restriction part KS.
Moreover, in the modification 2, the arm part 11B is formed so that it may have flexibility in the radial direction outer side (arrow DR14 direction of FIG. 14), and the nail | claw part 14B is formed in the front-end | tip of the arm part 11B. The lower restriction portion KS3 is formed so as to cover a circumferential position corresponding to the missing portion 3Af1 formed in the upper restriction portion KS1. The circumferential direction restriction portions KS4 and KS5 extend in the axis C direction from the circumferential end portion of the upper restriction portion KS1. The circumferential direction restriction parts KS4 and KS5 are formed at the same position in the circumferential direction as the missing part 3Af1.

As shown in FIG. 14, the claw portion 14 </ b> B is formed with a pair of side surfaces 14 </ b> Ba facing in the circumferential direction as inclined surfaces inclined with respect to the center line CL passing through the axis C. That is, in FIG. 14, an intersection P14 of a virtual line segment obtained by virtually extending the pair of side surfaces 14Ba is a center line in the width direction (up and down direction on the paper surface) of the claw portion 14B and a virtual line segment CL14 passing through the axis C. It is above and is located closer to the claw part 14B than the position of the axis C.
The upper restriction part KS1 has the same shape as the upper restriction part KS1 of the first modification. The lower restricting portion KS3 is an arc-shaped convex portion formed around the axis C so as to include a range corresponding to the missing portion 3Af1 of the upper restricting portion KS1.

The circumferential direction restriction portions KS4 and KS5 are wall-like portions extending in the axis C direction from the side of the missing portion 3Af1 in the upper restriction portion KS1 to the lower restriction portion KS3. The circumferential direction restricting portions KS4 and KS5 are formed in a symmetric shape with respect to the center line of the missing portion 3Af1 (not necessarily a perfect symmetric shape).
For example, as shown in FIG. 13B, the circumferential direction restricting portion KS4 is inclined by an angle β with respect to a line CL13 passing through the apex P1 and the axis C on the surface m1 facing the circumferential restricting portion KS5. It has become a surface. On the other hand, the wall surface m2 opposite to the surface m1 is a surface including a line passing through the vertex P2 and the axis C. The surface m1 may be inclined only on one of KS4 and KS5.
The circumferential direction restricting portion KS5 has the same symmetrical shape.
When attaching the operation knob 5A to the shaft 3A, first, the operation knob 5A is pushed over the shaft 3A. Then, in many cases, the lower surface of the claw portion 14B comes into contact with the upper surface of the upper restricting portion KS1, and the pushing is restricted.
Here, the operation knob 5A is rotated around the axis C while being urged in the pushing direction.
In this rotation, when the circumferential position of each claw portion 14B becomes the allowable position and coincides with the circumferential position of the missing portion 3Af1, the claw portion 14B passes through the missing portion 3Af1 and contacts the upper surface of the lower restricting portion KS3. Pushing in again is regulated again.
When the claw portion 14B is in an allowable position to pass through the missing portion 3Af1 by the initial pushing, the claw portion 14B does not contact the upper surface of the upper restricting portion KS1, and the operation knob 5A is directly on the upper surface of the lower restricting portion KS3. The contact is restricted by pushing.

In this state, when the operation knob 5A is rotated around the axis C by applying a force greater than a predetermined turning force and rotating, for example, clockwise, the claw portion 14B moves toward the circumferential direction regulating portion KS4 and moves in the moving direction. Then, the side surface 14Ba comes into contact with the surface m1 which is an uphill slope. Since the side surface 14Ba is formed as an inclined surface that actively guides the claw portion 14B in the direction of climbing the surface m1, the arm portion 11B slides over the circumferential direction restricting portion KS5 by sliding while bending. After getting over, the bending state of the arm portion 11B is released.
When the claw portion 14B gets over the circumferential direction restricting portion KS5, even if a force in the direction of being pulled out by the operation knob 5A is applied, the upper portion is restricted within the range other than the angle β2 between the wall surfaces m2 of the circumferential direction restricting portions KS4 and KS5. It contacts the lower surface of the part KS1.
Accordingly, the operation knob 5A is prevented from being pulled out from the shaft 3A.

When the claw portion 14B is positioned on the base side of the shaft 3A with respect to the lower restricting portion KS3, the operation knob 5A can freely rotate in the circumferential direction.
Even if a force is applied in a direction in which the operation knob 5A is pulled out when the claw part 14B is in an angle range where the lower restriction part KS3 exists, the claw part 14B comes into contact with the lower restriction part KS3 and pulls out the operation knob 5A. Is prevented.
The wall surface m2 that is a surface of the circumferential direction restricting portions KS4 and KS5 facing each other is a surface orthogonal to the movement of the claw portion 14B.
Accordingly, even if the claw portion 14B is tried to get over from the wall surface m2 side of the circumferential direction restricting portion KS4, a large resistance is generated between the wall surface m2 and the side surface 14Ba. Therefore, the arm part 11B does not bend easily.
That is, as compared with the case where the operation knob 5A is attached, the force required to get over the circumferential direction restriction portions KS4, KS5 when removing is greatly increased, and the operation knob 5A is difficult to come off the shaft 3A. ing.

In this second modification, when it is assumed that the operation knob 5A1 attached to the shaft 3A is released by some external force, not only the force for the linear movement of the operation knob 5A1 in the direction of the axis C but also the axis line A turning force around C must be applied. In addition, the force must be large enough to overcome the wall surface m2 of the circumferential direction restriction portions KS4 and KS5.
Therefore, it can be said that there is substantially no opportunity for the operation knob 5A1 to be unintentionally detached from the shaft 3A.

It is good also as the modification 2A which reversed the axis line C direction position of the upper control part KS1 and the lower control part KS3 with respect to the modification 2. The modification 2A uses an operation knob 5A1.
Fig.15 (a) is a perspective view which shows the modification 2A, FIG.15 (b) is S15-S15 sectional drawing in Fig.15 (a).
The shaft 3AA of the modified example 2A is provided with a lower restricting part KS1A and an upper restricting part KS3A in which the positional relationship in the axis C direction between the upper restricting part KS1 and the lower restricting part KS3 in the shaft 3A of the modified example 2 is reversed. Yes. The lower restriction portion KS3A is formed so as to cover a circumferential position corresponding to the missing portion 3Af1 of the upper restriction portion KS1. The circumferential direction restricting portions KS4 and KS5 extend in the axis C direction from the circumferential end of the upper restricting portion KS3A. The circumferential direction restriction parts KS4 and KS5 are formed at the same position in the circumferential direction as the missing part 3Af1.
Further, as shown in FIG. 15B, the positions of the surface m1 and the wall surface m2 in the circumferential direction restriction portions KS4 and KS5 are also reversed.
That is, the facing surfaces facing each other are the wall surface mm2, and the surfaces facing away from each other are the inclined surfaces.
When attaching the operation knob 5A1 to the shaft 3AA, first, the operation knob 5A1 is pushed over the shaft 3AA. Then, in many cases, the lower surface of the claw portion 14B comes into contact with the upper surface of the lower restricting portion KS1A, and the pushing is restricted.
When the claw portion 14B comes into contact with the upper surface of the upper restricting portion KS3A by the initial pushing, the claw portion 14B is detached from the upper restricting portion KS3A by rotating the operation knob 5A1 around the axis C while being pushed. It moves toward the root side and comes into contact with the upper surface of the lower restricting portion KS1A.
In this state, when the operation knob 5A1 is rotated around the axis C without applying a force more than a predetermined turning force, for example, clockwise, the arm portion 11B is bent, but the claw portion 14B is restricted in the circumferential direction. Climb and climb over the surface mm1 which is the inclined surface of the part KS5. After getting over, the bending state of the arm portion 11B is released.
When the claw portion 14B gets over the circumferential direction restricting portion KS5, the claw portion 14B is naturally positioned at an allowable position corresponding to the missing portion 3Af1 of the lower restricting portion KS1A.
Therefore, if the operation knob 5A is simply pushed in after the claw portion 14B has passed over the circumferential direction restricting portion KS5, the claw portion 14B can pass through the lower restricting portion KS1A and the press-fit portion 3c can be accommodated in the accommodation space 13. become.
Even if a force in the direction of being pulled out by the operation knob 5A is applied in this state, the claw portion 14B contacts the lower surface of the lower restricting portion KS1A or the upper restricting portion KS3A.
Accordingly, the operation knob 5A is prevented from being pulled out from the shaft 3A.

Also in Modification 2 and Modification 2A described above, the inclination angle of the surfaces m1, mm1 and the wall surfaces m2, mm2 and the inclination angle of the side surface 14Ba of the claw portion 14B may be arbitrarily set.
In the second modification, a plurality of sets of the missing portion 3Af1, the circumferential direction regulating portions KS4, KS5, and the lower regulating portion KS3 in the upper regulating portion KS1 may be provided in the circumferential direction.
In Modification 2A, a plurality of sets of the missing portion 3Af1, the circumferential direction regulating portions KS4 and KS5, and the upper regulating portion KS3A in the lower regulating portion KS1A may be provided in the circumferential direction.
In the second modification and the second modification, a rotational force is required to pass through the restricting portion KS. Therefore, the shafts 3A in the circumferential direction of the operation knobs 5A and 5A1 that allow the press-fitting of the press-fit portion 3c into the accommodation space 13 are allowed. , 3AA and the operation knobs 5A, 5A1 where the claw part 14B passes through the missing part 3Af1 and the relative positions of the shafts 3A, 3AA are the same position, the operation knobs 5A, 5A1 are the shafts 3A, 3AA. There is almost no chance to get out of it. Of course, it is preferable that they are in different positions.
Further, in the modified example 2A, when the posture of the operation knob 5A is adjusted to an allowable position that can pass through the missing portion 3Af1, only the rotational force needs to be applied to the operation knob 5A, and thus a pushing force is required. From the second modification, the attachment work can be performed easily.

As shown in FIG. 16, in Modification 2, the upper surface 3Afu of the upper restricting portion KS1 is preferably a slope that approaches the lower restricting portion KS3 as it approaches the missing portion 3Af1.
That is, the upper surface 3Afu is formed so as to approach the root side of the shaft 3A as it goes toward the missing portion 3Af1.
Accordingly, when the operation knob 5A is attached to the shaft 3A, when the operation knob 5A is pushed downward in FIG. 16, the claw portion 14B is naturally guided to the missing portion 3Af1, and the operation knob 5A is controlled upward by the claw portion 14B. The labor for adjusting to an allowable position passing through the portion KS1 is reduced.
All of the missing portions 3Af1 are not inclined surfaces, and may have a flat portion that is not inclined (the distance to the lower regulating portion KS3 does not change).

In the second modification, the set of the missing portion 3Af1, the circumferential direction restricting portions KS4, KS5, and the lower restricting portion KS3 in the upper restricting portion KS1 may not be formed integrally with the shaft 3A.
In the modified example 2A, the set of the missing portion 3Af1, the circumferential direction restricting portions KS4, KS5, and the upper restricting portion KS3A in the lower restricting portion KS1A may not be formed integrally with the shaft 3AA.
For example, a ring member having a shape corresponding to these sets may be formed of a resin material or the like, a reduced diameter portion may be formed at a predetermined position of the shafts 3A and 3AA, and the ring member may be fitted.

<Example 3>
Example 3 of the operation knob mounting structure includes any one of the press-fitting portion AN2 that restricts the linear movement of the operation knob 5B relative to the shaft 3B in the direction of the axis C and the rotation around the axis C by frictional force, and the operation knob 5B and the shaft 3B. A function of restricting rotation of the operation knob 5B around the axis C with respect to the shaft 3B by contact with the movement restricting part KS in the direction of the axis C composed of a concave part or a convex part on one side. It is made into the structure which has.
In the following, portions that are different from the first and second embodiments will be mainly described.

FIG. 17 shows a state before the operation knob 5B is attached to the shaft 3B in the third embodiment.
In FIG. 17, the shaft 3B has a press-fit portion 3Bc having a slit SW at the tip.
The shaft 3B has an arc-shaped reduced diameter portion 3Bs closer to the root side than the press-fit portion 3Bc.

18 is a cross-sectional view taken along the line S16-S16 in FIG. The S16-S16 cross-sectional view is a cross-sectional view of the reduced diameter portion 3Bs of the shaft 3B cut along a plane orthogonal to the axis C and viewed from the front end side of the shaft 3B.
As shown in FIG. 18, the reduced diameter portion 3 </ b> Bs is formed in two axially symmetrical positions within a predetermined angle range.
The operation knob 5B attached to the shaft 3B has a shaft receiving portion 5Ba into which the press-fit portion 3Bc is press-fitted, and an engaging portion 5Bb having an arm portion 5Bd that engages with the reduced diameter portion 3Bs.
The engaging portion 5Bb includes an arm portion 5Bd having a protruding portion 5Bt at the tip. The protrusion 5Bt engages with the shape of the reduced diameter portion 3Bs in the direction of the axis C and the circumferential direction with almost no backlash. In FIG. 18, the outer diameter line of the operation knob 5 </ b> B is indicated by a one-dot chain line for convenience.
The arm 5Bd includes a pair of protrusions 5Bt.
The arm portion 5Bd has flexibility so that the protruding portion 5Bt can move in the diameter increasing direction at a position corresponding to the reduced diameter portion 3Bs.
The press-fit portion 3Bc has only a slot SW, and the press-fit portion 3Bc is pushed into the shaft receiving portion 5Ba so as to be depressed.
As a result, the operation knob 5B is held in the shaft 3B while being restricted from moving in the direction of the axis C and in the rotational direction around the axis C only by the frictional force caused by the press-fitting.

When attaching the operation knob 5B to the shaft 3B, the operation knob 5B is pushed into the shaft 3B while aligning the circumferential positions of the protruding portion 5Bt and the reduced diameter portion 3Bs.
When the press-fitting proceeds by a predetermined amount, the protrusion 5Bt is fitted into the reduced diameter portion 3Bs, and the attachment is completed.
The upper and lower surfaces of the protrusion 5Bt and the upper and lower surfaces of the reduced diameter portion 3Bs facing the protrusion 5Bt in a state where the operation knob 5B is attached to a predetermined position of the shaft 3B are used when the operation knob 5B is removed. It is preferable to incline at a desired angle so that the extraction force becomes a predetermined force.

As shown in FIG. 19, the shaft 3B is formed with a notch 3Bst along the axis C, and a projection that is engaged with the notch 3Bst and guided in the direction of the axis C is provided, for example, at the engaging portion 5d of the operation knob 5B. It is also possible to keep it.
When the operation knob 5B is inserted into the shaft 3B, the circumferential position of the operation knob 5B with respect to the shaft 3B is determined by engaging the protrusion with the notch 3Bst, and then the installation is completed simply by pushing it in as it is.
The protrusion that engages with the notch 3Bst along the axis C of the shaft 3B and the notch 3Bst of the operation knob 5B and is guided in the direction of the axis C may not be formed.
In the third embodiment, in the fitting between the reduced diameter portion 3Bs and the protruding portion 5Bt, the fitting portion may be movable by a predetermined distance in the axis C direction.
Furthermore, the length in the axis C direction of the press-fit portion AN2 into which the shaft receiving portion 5Ba is press-fitted into 3B may be set shorter than the predetermined distance.
In this case, even if the press-fit portion AN2 is removed, the operation knob 5B is difficult to come off due to the contact between the protruding portion 5Bt and the reduced diameter portion 3Bs.

  Each embodiment and each modification of the present invention is not limited to the above-described configuration, and it goes without saying that other modifications may be made without departing from the gist of the present invention.

In the first and second embodiments, the press-fit shape, that is, the engagement shape, between the shafts 3, 3A, 3AA and the operation knobs 5, 5A, 5A1 is not limited to the D-cut shape. A cross hole shape, a square hole shape, an irregular shape, etc. may be sufficient.
In any case, it is only necessary that the movement of the operation knobs 5, 5A, 5A1 in the direction of the axis C is restricted by the frictional force caused by the press-fitting, and the rotation around the axis C is restricted by the engagement shape.
Further, the arm portions 11 of the operation knobs 5, 5 </ b> A, 5 </ b> A <b> 1 do not have to be arm-shaped as long as they can be flexed outward. For example, it may be a shape that has one or more slots and covers the circumferential direction.
Further, the restricting portion may be a screw formed on the shaft, a simple protrusion not formed with the missing portion, or an inclination that can be overcome using the flexibility of the arm portion 11. Moreover, it is good also as a resin spring instead of D spring.

The electronic device according to the present invention is configured such that the electrical characteristics change or the electrical characteristics differ depending on the rotation of the shafts 3, 3A, 3B of the rotation operation unit 1 provided.
The rotation operation unit 1 is not limited to one that can rotate without limitation.
It can be rotated (turned) within a predetermined angle range (including 360 ° or more), and its electrical characteristics change according to the rotation angle. Like a selector, it can be turned within a predetermined angle range. In addition, the present invention can be applied to various types, such as those in which a click feeling is obtained at a predetermined angular pitch and the electrical characteristics are different from each other.

  The electronic device provided with the rotation operation unit 1 is not limited to the wireless device MK. For example, a car navigation device, an audio device, a musical instrument, or the like may be used. In particular, the present invention can be suitably applied to a portable type that can pick and lift an operation knob.

DESCRIPTION OF SYMBOLS 1 Rotation operation part 2 Volume, 2a Volume main body, 2b Male screw part, 2c Male screw 3, 3A, 3AA, 3B Shaft 3a Contained part, 3b Exposed part, 3c, 3Bc Press-fit part, 3d Extension part 3e Outer surface, 3f Male screw Part, 3g upper flank surface, 3h lower flank surface 3Af convex part, 3Af1, 3Af2 missing part, 3Afu upper surface 3Bs reduced diameter part, 3Bst notch part, 4 nut 5, 5A, 5A1, 5B operation knob 5Ba shaft receiving part, 5Bb Joint part, 5Bd Arm part, 5Bt Projection part 6 Knob body, 6k Fitting hole 7 D spring, 8 Tube part, 9 Lid part, 10 D spring accommodating part 11, 11A, 11B Arm part, 11a Tip part 12 Space, 13 Accommodating spaces 14, 14A, 14B Claw, 14Ba side surface, 14a back side inclined surface 14b front side inclined surface, 14As lower surface, 14Au upper surface 15 AN, AN2 press-fit portion, C axis, CL14 centerline KS movement restricting portion, KS1, KS3A regulatory unit, KS2, KS3, KS1A bottom regulating portion KS4, KS5 circumferential direction regulating portion KM radios (electronic device)
m1 surface, m2 wall surface P1, P2 vertex, P14 intersection SW slot TS contact part Ma antenna

Claims (19)

An operation knob mounting structure for holding the operation knob in a state of being attached to the shaft,
A first restricting portion configured to select whether the operation knob is prohibited or permitted to move in the axial direction of the shaft according to the presence or absence of contact;
A second restricting portion for restricting movement of the operation knob in the axial direction of the shaft by a frictional force at a tip portion of the shaft and holding the operation knob on the shaft;
A mounting structure for the operation knob.   2. The operation knob mounting structure according to claim 1, wherein the first restricting portion is configured to select the allowance only in a state in which the restriction of the second restricting portion is removed. The second restricting portion restricts relative movement of the operation knob in the rotation direction with respect to the shaft;
The said 1st control part is a structure which accept | permits the movement of the axial direction of the said shaft of the said operation knob by operation with rotation by the user of the said operation knob. Mounting structure of the operation knob.   The relative position in the axial direction between the operation knob and the shaft when allowed by the first restricting portion, and the relative position in the axial direction between the operation knob and the shaft when restricted by the second restricting portion. The attachment structure of the operation knob according to any one of claims 1 to 3, wherein and are different from each other. The shaft has a press-fit portion at the tip, and a first restriction surface that is inclined toward the tip side of the shaft as it is orthogonal to the axis of the shaft or away from the axis is provided on the outer periphery integrally or separately. And
The operation knob has a housing space for housing the press-fit portion of the shaft and has a second restriction surface, and the press-fit portion is press-fitted into the housing space and attached to the tip of the shaft. With the operation knob attached to the shaft,
The second restricting surface is provided at a position farther from the press-fit portion than the first restricting surface, and at least partially overlaps the first restricting surface when viewed from the direction of the axis.
The second restricting surface contacts the first restricting surface by moving in the axial direction, and the axis of the shaft in the first restricting portion is brought into contact with the second restricting surface and the first restricting surface. 5. The operation knob mounting structure according to any one of claims 1 to 4, wherein movement in a direction is prohibited. A predetermined number of external threads are formed on the outer periphery of the shaft, and the first restriction surface is a flank surface of the external thread.
The operation knob according to claim 5, wherein the operation knob is formed with a claw portion that can be screwed onto the male screw of the shaft, and the second restriction surface is formed on the claw portion. Mounting structure. In the axial direction of the shaft,
The shortest distance between the accommodation space of the operation knob and the second restriction surface is set to be larger than a longest distance between the press-fit portion of the shaft and the male screw. Item 6. A knob mounting structure according to Item 6. The first restricting portion restricts movement of the operation knob in the axial direction of the shaft by contact within a predetermined angle range around the axis of the shaft of the operation knob, and outside the predetermined angle range. Allow,
When the operation knob is attached to the shaft, the operation knob is held on the shaft by the second restriction portion after the first restriction portion is allowed to move in the axial direction of the shaft. The operation knob mounting structure according to any one of claims 1 to 4, wherein the operation knob is configured to be configured.   9. The operation knob mounting structure according to claim 8, wherein the first restricting portion restricts by contact at a plurality of positions in an axial direction of the shaft.   The shaft has a press-fit portion at the tip portion, protrudes in a bowl shape from the outer periphery in the radial direction, and a convex portion having a missing portion that is partially missing in the circumferential direction is provided integrally or separately. The operation knob has an accommodating space for accommodating the press-fitted portion of the shaft and a contact portion capable of contacting the convex portion of the shaft, and is formed between the convex portion and the contact portion. The movement of the said operation knob to the axial direction of the said shaft in the said 1st control part is prohibited by contact | abutting, The any one of Claims 1-4 or Claim 8-9 characterized by the above-mentioned. Mounting structure of the operation knob.   The distance from the tip of the shaft to the root-side surface of the convex portion is not more than the shortest distance among the distances between the housing space and the contact portion. Item 10. A knob mounting structure according to Item 10.   The said convex part is formed in multiple numbers by the axial direction of the said shaft, The relative position of the circumferential direction differs in the said missing part in at least 2 convex part among these convex parts. Or the mounting structure of the operation knob of 11.   A circumferential-direction regulating portion that extends in the axial direction of the shaft and regulates the circumferential movement of the abutting portion is formed between at least two of the plurality of convex portions, and the abutting portion is 13. The operating knob mounting structure according to claim 12, wherein the operating knob is formed on the operating knob via an arm portion having flexibility toward a radially outer side of the shaft.   14. One of the plurality of convex portions is formed at a position corresponding to the missing portion of at least one other convex portion in the axial direction. Mounting structure of the described operation knob.   15. The surface according to claim 10, wherein a surface of the convex portion facing the tip end side of the shaft is formed so as to approach the base side of the shaft as it goes to the missing portion. Mounting structure of the described operation knob. The first restricting portion restricts movement of the operation knob in the axial direction of the shaft and rotation around the axis by contact at a predetermined angular position around the axis of the shaft of the operation knob,
The operation knob is held by the shaft by simultaneously performing restriction by the first restricting portion and the second restricting portion with respect to the movement in the axial direction and the movement around the axial line. The mounting structure of the operation knob according to claim 1. An operation knob mounting structure for holding the operation knob in a state of being attached to the shaft,
The shaft has a press-fit portion at the tip, and a first restriction surface that is inclined toward the tip side of the shaft as it is orthogonal to the axis of the shaft or away from the axis is provided on the outer periphery integrally or separately. And
The operation knob has an accommodation space for accommodating the pressed-in portion of the shaft and a second restriction surface is formed.
In the state where the press-fit portion is press-fitted into the housing space and attached to the tip of the shaft, the operation knob is attached to the shaft,
The second restriction surface is located at a position farther from the press-fit portion than the first restriction surface, and is provided at a position at least partially overlapping the first restriction surface when viewed from the direction of the axis. An operating knob mounting structure characterized by that. An operation knob mounting structure for holding the operation knob in a state of being attached to the shaft,
The shaft has a press-fit portion at the tip portion, protrudes in a bowl shape radially outward from the outer periphery, and a convex portion having a missing portion that is partially missing in the circumferential direction is provided integrally or separately.
The operation knob has a housing space for housing the press-fit portion of the shaft and a contact portion capable of contacting the convex portion of the shaft, and the press-fit portion is press-fitted into the storage space. And the shaft is attached to the tip of the shaft, and the operation knob is prohibited from moving in the axial direction of the shaft due to the contact between the convex portion and the contact portion. Knob mounting structure. The operation knob mounting structure according to any one of claims 1 to 18, comprising:
An electronic apparatus characterized in that an electrical characteristic is changed by rotation of the shaft, or an electrical characteristic is different.

Images