JPH11233311A - Knob fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the shaking of a knob at the time of the rotation of the knob by a method, wherein a knob fitting structure is provided with a spring which is made contact with the inner wall of the outer peripheral part of the knob and presses the outer peripheral part to the outside. SOLUTION: A volume axis 22 is attached to an insertion hole 32 formed in a panel 31, in such a way as to protrude outside of an equipment and after an annular securing part 42 of a spring 41 is inserted in the shaft 22, a volume 21, and the spring 41 are clamped together with each other by a nut 24. A knob mounting part 23 is pressed in a shaft attaching part 13 of a knob 11, the knob 11 is fitted on the axis 22 and the spring 41 is mounted to the panel 13 in a state that an abutting part 43 of the spring 41 is pressed to the inner wall of the outer peripheral part 12 of the knob 11. Moreover, two pieces of hemispherical recessed parts are formed so that a projecting part formed on the spring in the vicinity of the lower end of the inner wall of the knob outer peripheral part 12 is fitted into the recessed part on one side of the two pieces of the hemispherical recessed parts provided in the inner wall of the knob outer peripheral part 12, and moreover the protruding part formed on the spring is fitted into the other recessed part at the position, where they are positioned at both ends in the range of the rotation of the knob (volume shaft 22).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a knob for rotating a shaft such as a knob for operating a volume used in an electronic device or the like.

[0002]

2. Description of the Related Art Conventionally, rotary operation type knobs are often used in electronic devices and the like. For example, a volume control rotary volume control in an audio device has a volume shaft protruding outside the device, and a round bar-shaped shaft tip is partially cut into a D-shaped cross-section to rotate the outer diameter several times larger than the shaft diameter. In the volume shaft mounting part of the shape corresponding to the shaft tip part of the knob,
The volume shaft is easily rotated by press-fitting the shaft and fixing the knob to the shaft.

[0003]

However, wobbling of the volume axis, which is determined by the dimensional accuracy of the volume itself, is unavoidable in terms of structure. There is a problem that the ring gets worse.

[0004] Further, in the case of a component for rotating a shaft such as a volume, in order to make it easy to understand the operation amount, for example, to make it easy to see the start point, middle point or end point of volume rotation, for example, every predetermined rotation angle is set. In some cases, it is required to increase the rotational resistance, that is, to give a so-called click feeling. By realizing this with a knob structure instead of the volume itself, it is an issue to realize a click feeling with a general-purpose volume. ing.

An object of the present invention is to solve such a problem.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In a mounting structure of a knob for rotating a shaft, a spring which comes into contact with an inner wall of an outer peripheral portion of the knob and presses the outer peripheral portion outward is provided. It is characterized by being provided. In addition, a convex portion of the spring that comes into contact with the outer peripheral portion inner wall of the knob is formed in a hemispherical shape, and at both ends of the range where the shaft rotates, a portion of the outer peripheral portion inner wall of the knob that the convex portion of the spring comes into contact with is formed. It is characterized in that a concave portion which fits with the hemispherical convex portion is provided.

[0007] Further, in a range in which the shaft rotates, a concave portion is provided on the inner wall of the outer peripheral portion of the knob where the convex portion of the spring comes into contact with the plurality of convex portions. I do. Further, a plurality of the springs are provided. Further, the plurality of springs are integrally formed.

Further, the plurality of springs are provided at positions to be rotated about the axis.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a knob mounting structure according to a first embodiment of the present invention. FIG. 1 (a) is a sectional view, and FIG. 1 (b).
Is a perspective view of a spring. Reference numeral 11 denotes a shaft turning knob for operating an electronic device or the like, which is formed in a resin or the like and has a shape of a truncated cone having a hollow and opened lower surface. Reference numeral 12 denotes an outer peripheral portion of the knob 11, and reference numeral 13 denotes a shaft mounting portion. The shaft mounting portion 13 has a cylindrical mounting portion 14 protruding from the center of the bottom surface (back of the upper surface) of the knob 11 and having a D-shaped cross section (A portion is flat) at the center.
Are formed. Reference numeral 21 denotes a volume control rotary type volume, and reference numeral 22 denotes a volume axis for rotating the volume. 23 is a knob 11 at the tip of the volume shaft 22.
The knob mounting portion has a D-shaped cross section (A portion is flat) corresponding to the shaft mounting portion 13 of FIG.

Reference numeral 31 denotes a panel of an electronic device or the like, and reference numeral 32 denotes an insertion hole through which the volume shaft 22 is inserted to project outside the device. Numeral 24 denotes a nut which is screwed with a screw provided on the volume 21 and screwes the volume 21 to the panel 31. Reference numeral 41 denotes a spring formed of spring steel, resin, or the like, which is bent substantially in the vicinity of the center into an L-shape (vertical direction), and one end of which is inserted into the volume shaft 22 and connected to the volume 21 and the panel 31 by the nut 24. A ring-shaped fixing portion 42 to be screwed is formed, and the other end is bent in a U-shape near the other end to form a contact portion 43 that contacts the inner wall of the outer peripheral portion 12 of the knob 11. The spring 41 is formed such that the contact portion 43 elastically presses the inner wall of the outer peripheral portion 12 of the knob 11. In FIG. 1A, the spring 41 is in an elastically deformed state.

Next, the mounting structure of the knob will be described. The volume shaft 22 is attached to the insertion hole 32 of the panel 31 so as to protrude outside the device. After the ring-shaped fixing portion 42 of the spring 41 is inserted into the volume shaft 22, the volume 21 and the spring 41 are fastened together with the nut 24. Then, the knob mounting portion 23 is press-fitted into the shaft mounting portion 13 of the knob 11, and the knob 11 is mounted on the volume shaft 22. Then, the spring 41
Is attached in a state where the contact portion 43 is pressed against the inner wall of the knob outer peripheral portion 12.

According to the knob mounting structure of the present embodiment described above, the knob 11 rotates while being pressed in a certain direction by the elastic force of the spring 41 pressed against the inner wall of the knob outer peripheral portion 12. The wobble at the time of turning the knob 11 due to wobble can be reduced.
FIG. 2 is a configuration diagram showing a knob mounting structure according to a second embodiment of the present invention. FIG. 2A is a sectional view of the knob, and FIG.
(B) is sectional drawing of a spring. In this embodiment, the same components as those in the first embodiment shown in FIG.

Reference numeral 44 denotes a spring formed of spring steel, resin, or the like, which is bent upward at a right angle from near the center, and one end of which is inserted into the volume shaft 22 and screwed with the nut 24 to form a ring. A hemispherical convex portion 45 is formed near the other end by pressing or the like. Reference numeral 15 denotes a shaft rotating knob for operating an electronic device or the like which is formed of resin or the like and forms a hollow truncated cone having an open lower surface, 12 denotes an outer peripheral portion of the knob 15, 13 denotes a shaft mounting portion, and 14 denotes a shaft mounting. Hole. Reference numerals 161 and 162 denote hemispherical concave portions provided on the inner wall of the knob outer peripheral portion 12, and springs 44 near the lower end of the knob outer peripheral portion 12 inner wall.
And the knob 15
Two pieces are formed so that the convex portions 45 of the springs 44 are fitted at positions at both ends (start point 161 and end point 162) of the rotation range of the (volume shaft 22).

Next, the mounting structure of the knob will be described. The volume shaft 22 is attached to the insertion hole 32 of the panel 31 so as to protrude outside the device. After the ring-shaped fixing portion 42 of the spring 44 is inserted into the volume shaft 22, the volume 21 and the spring 44 are fastened together with the nut 24. Then, the knob mounting portion 23 of the volume shaft 22 is connected to the shaft mounting portion 1 of the knob 15.
3 and the knob 15 is mounted on the volume shaft 22. Then, the convex portion 45 of the spring 44 comes into contact with the inner wall of the knob outer peripheral portion 12, and when the knob 15 is rotated, the convex portion 45 becomes the concave portions 161 and 162 at the start point and the end point of the rotation range of the knob 15.
, And the rotation of the knob 15 is regulated at that position.

According to the above-described knob mounting structure of the present embodiment, the knob 11 rotates while being pressed in a certain direction by the elastic force of the spring 41 pressed against the inner wall of the knob outer peripheral portion 12. The wobble at the time of turning the knob 11 due to wobble can be reduced.
In addition, the turning range of the volume 21 becomes clear by a click feeling (rotation resistance increases) in which the convex portion 45 of the spring 44 fits into the concave portions 161 and 162 of the inner wall of the knob outer peripheral portion 12.

FIG. 3 is a bottom view showing a knob according to the third embodiment of the present invention. In the present embodiment, the same components as those in the first and second embodiments shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted. Reference numeral 17 denotes an axis turning knob for operating an electronic device or the like formed of resin or the like and forming a hollow truncated cone having an open lower surface, and 12 denotes a knob 1
Reference numeral 7 denotes an outer peripheral portion, 13 denotes a shaft mounting portion, and 14 denotes a shaft mounting hole.
Reference numeral 18 denotes a plurality of recesses which are provided in the entire rotation range of the knob 17 at positions corresponding to the hemispherical protrusions 45 of the spring 44 on the inner wall of the knob outer peripheral portion 12 and into which the protrusions 45 are fitted.

Next, the mounting structure of the knob will be described. The volume shaft 22 is attached to the insertion hole 32 of the panel 31 so as to protrude outside the device. After the ring-shaped fixing portion 42 of the spring 44 is inserted into the volume shaft 22, the volume 21 and the spring 44 are fastened together with the nut 24. Then, the knob mounting portion 23 of the volume shaft 22 is connected to the shaft mounting portion 1 of the knob 17.
3 and the knob 15 is mounted on the volume shaft 22. Then, the convex portion 45 of the spring 44 is fitted into one of the concave portions 18 over the entire rotation range of the knob 17 on the inner wall of the knob outer peripheral portion 12.

According to the knob mounting structure of this embodiment described above, the knob 17 rotates while being pressed in a certain direction by the elastic force of the spring 44 pressed against the inner wall of the knob outer peripheral portion 12. The wobble at the time of turning the knob 17 due to wobble can be reduced.
In addition, the convex portion 45 of the spring 44 is fitted into the concave portion 18 at a predetermined rotation angle over the entire rotation range of the knob 17 on the inner wall of the knob outer peripheral portion 12 and the rotational resistance is increased, so that the click feeling is not the volume itself but the knob structure. Can be realized.

FIG. 4 is a structural view showing a spring according to a fourth embodiment of the present invention. FIG. 4 (a) is a top view, and FIG. 4 (b) is a sectional view taken along the line AA. In this embodiment, the same components as those in the first embodiment shown in FIG. Reference numeral 46 denotes a spring formed of spring steel or resin, and a ring-shaped fixing portion 47 which is inserted into the volume shaft 22 and screwed with the nut 24 is provided at the center. An extending portion 48 is provided extending in three directions at equal angles around the fixing portion 47, and the bent extending portion 4 is bent upward at a right angle from the extending portion 48.
9 are formed. A hemispherical convex portion 50 that is in contact with the inner wall of the outer peripheral portion 12 of the knob 11 is provided near the distal end of the bent extension portion 49 by pressing.

Next, the mounting structure of the knob will be described. The volume shaft 22 is attached to the insertion hole 32 of the panel 31 so as to protrude outside the device. After the fixing portion 47 of the spring 46 is inserted through the volume shaft 22, the volume 21 is
And the spring 46 together. Then, the knob mounting portion 23 is press-fitted into the shaft mounting portion 13 of the knob 11, and the knob 11 is mounted on the volume shaft 22. Then, the convex portion 50 of the spring 46
Are attached to the inner wall of the knob outer peripheral portion 12 while being pressed at three places.

According to the above-described knob mounting structure of the present embodiment, the knob 11 is rotated while being pressed in the outer peripheral direction of the knob by the elastic force of the spring 46 pressed from three places against the inner wall of the outer peripheral portion 12 of the knob. So the volume axis 22
The wobbling of the knob 11 due to wobble can be reduced, and the elastic force of the spring 46 is applied to the knob 11 with good symmetry about the volume shaft 22. Therefore, even when the knob 11 is rotated, the volume shaft 22 is rotated.
Can be stabilized at a position centered at.

The spring 46 shown in FIG. 4 and the spring 46 shown in FIG.
It is also possible to combine the knob 15 shown in FIG. 3 or the knob 17 shown in FIG. Addition, stabilization of knob position, etc.
The same effects as those of the above-described embodiments are exhibited.

[0023]

As described above, according to the knob mounting structure of the present invention, the wobble at the time of turning the knob due to the wobble of the volume shaft can be reduced, and the operation feeling of the knob can be improved. In addition, since the rotational resistance of the knob can be increased at the rotational position of the knob, the click feeling makes it easier to understand the start point and the end point of the knob operation range and the knob operation amount, and also improves the feeling during operation.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a knob mounting structure according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a knob mounting structure according to a second embodiment of the present invention.

FIG. 3 is a bottom view showing a knob according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram illustrating a spring according to a fourth embodiment of the present invention.

[Explanation of symbols]

 11: knob for rotating shaft 12: outer periphery of knob 13: shaft mounting portion 14: shaft mounting hole 21: rotary volume for volume control 22: volume Shaft 23 Knob mounting part 24 Nut 31 Panel 32 Insertion hole 41 Spring 42 Fixing part 43 Contact part

Claims (6)

[Claims] 1. A mounting structure for a shaft turning knob, comprising: a spring that comes into contact with an inner wall of an outer peripheral portion of the knob and presses the outer peripheral portion outward. 2. A convex portion of the spring, which is in contact with the inner wall of the outer periphery of the knob, is formed in a hemispherical shape, and the convex portion of the spring on the inner wall of the outer periphery of the knob is abutted at both ends of the range in which the shaft rotates. The knob mounting structure according to claim 1, wherein a concave portion that fits with the hemispherical convex portion is provided at a contact portion. 3. A plurality of recesses, which are fitted to the plurality of protrusions, are provided in a portion of the inner wall of the outer periphery of the knob where the protrusions of the spring abut in a range in which the shaft rotates. The knob mounting structure according to claim 2. 4. The knob mounting structure according to claim 1, wherein a plurality of said springs are provided. 5. The knob mounting structure according to claim 4, wherein said plurality of springs are integrally formed. 6. The apparatus according to claim 4, wherein the plurality of springs are provided at positions to be rotated about the axis.
Or the knob mounting structure according to claim 5.