JP2011059990A - Knob device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knob device, capable of being mounted without operating special working to the shape of the top end of a rotary shaft, obtaining a high holding force against the rotary shaft, and maintaining its good appearance. <P>SOLUTION: A knob device A is provided with: a knob support 1 mounted on a rotary shaft B; and a knob body 2 mounted on the knob support 1, and the knob support 1 is configured of: a mounting member 3 mounted on the top end of the rotary shaft B; a fastening member 4 for fastening the mounting member 3 to the rotary shaft B; a fastening nut 5 screwed into a bolt section 10 formed at the upper part of the mounting member 3 and pushing the fastening member 4 downward. The mounting member 3 is formed with a plurality of vertical division grooves 12 on the circumferential face, and formed with an externally swelling skirt section 11 toward the lower part, and the fastening member 4 is formed with a fitting recess 15 fit into the mounting member 3, and the knob body 2 is formed with the fitting recess 25 fit into the fastening member. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a knob device, and more particularly to a knob device for rotating a rotary shaft attached to a rotary shaft such as a variable resistor.

  Conventionally, in order to fix the knob to the rotating shaft, a screw hole for screwing a fixing screw was provided on the side of the knob, and the fixing screw was screwed into this screw hole to fix the knob to the rotating shaft. Although the tip of the fixing screw got stuck on the surface and was damaged, the knob did not come off the rotating shaft even if the fixing screw was removed, so it was necessary to form a flat part (D cut) on the rotating shaft. There has been proposed a knob fixing mechanism that allows the knob to be attached without processing such as D-cut. (For example, patent document 1). In this knob fixing mechanism, the holder is inserted into the tip of the rotary shaft, the knob is put on the holder, the screw is screwed into the female screw portion of the holder through the screw hole formed on the upper surface of the knob, and the holder tightens the shaft to tighten the knob. And the shaft can be fixed.

Japanese Utility Model Publication No. 1-178619

  The problem to be solved by the present invention is that, in the above-described knob fixing mechanism, the knob itself is removed from the shaft by loosening and removing the screw in replacement work caused by damage or contamination of the knob itself. There is also a problem that the holder comes off the shaft, there is a problem that it looks bad because the screw is exposed on the knob, and there is also a problem that the knob cannot be replaced unless the screw is removed with a tool. It was. In addition, it is conceivable that the holder and the knob are integrated. However, when the knob is replaced, the holder is also replaced, and even those that do not need to be replaced are discarded. It is done.

  The present invention solves the above-described problems, and can remove and install the knob body without using a tool while the knob support that supports the knob body is fixed to the rotary shaft. It is an object of the present invention to provide a knob device with good appearance.

In order to solve the above-described problem, a knob device according to the present invention includes a knob support attached to a rotary shaft, and a knob body that can be fitted to and removed from the knob support, and has the following requirements. .
(A) The knob support is screwed onto a mounting member that is attached to the tip of the rotating shaft, a fastening member that is fitted to the mounting member and supports the knob body, and a bolt formed on the top of the mounting member. (B) The mounting member is formed with a plurality of longitudinally divided grooves on the peripheral surface, and skirts that bulge outward toward the lower side. (C) The fastening member is formed with a fitting recess for fitting with the mounting member, and an opening for projecting the bolt part of the mounting member is formed on the upper surface. (2) The knob The main body is formed so as to cover the tightening member from the upper surface, and a fitting recess for fitting the tightening member is formed on the bottom surface.

  A first engaging portion and a second engaging portion project from the inner wall surface of the fitting recess of the knob body, and the first engaging recess and the second engaging portion are formed on the outer peripheral surface of the tightening member. When the knob body is fitted to the tightening member, the first engaging portion and the first engaging recess are engaged to perform circumferential positioning, It is preferable that the second engaging portion and the second engaging concave portion engage to perform axial positioning.

  According to the invention of claim 1, it is not necessary to provide a condition for the shape of the tip of the rotating shaft, and it is possible to provide a knob device that can flexibly cope with and has an excellent appearance.

  According to the invention of claim 2, when the knob main body is fitted into the knob support fixed to the rotating shaft, the first engaging portion and the first engaging recess are engaged to perform circumferential positioning. In addition, since the second engaging portion and the second engaging concave portion are held with an appropriate holding force by the engagement, if the knob body is intentionally pulled out, the knob support body is attached to the rotating shaft. It can be removed from the knob support while it is fixed. When the knob body is damaged or soiled, it can be easily replaced with another knob body without using a tool, and only the knob body remains without leaving the knob support. Can be exchanged so that work can be reduced and waste can be reduced.

Explanatory drawing which shows the structure of the knob apparatus which concerns on this invention Exploded perspective view of the knob device (A)-(c) is a bottom perspective view of the mounting member, a sectional view taken along line XX of the fastening member, and a bottom perspective view of the knob body. (A)-(d) is sectional drawing explaining the process in which a fastening member is attached to an attachment member (A)-(c) is sectional drawing explaining the process of attaching a knob main body to a knob support body.

  FIG. 1 shows a perspective view of the knob device A. The knob device A is attached to the tip of the rotary shaft B and is used to turn the rotary shaft B by turning the knob device A by hand. The knob support 1 is attached to the rotary shaft B, and the knob body 2 is attached to the knob support 1.

  As shown in FIG. 2, the knob support 1 includes an attachment member 3 attached to the distal end portion of the rotary shaft B, a fastening member 4 that fastens the attachment member 3 from the outside and fixes the rotary shaft B to the rotary shaft B, and the fastening member 4. And a tightening nut 5 for tightening.

  The mounting member 3 has an upper portion 3a protruding upward to form a bolt portion 10 into which the tightening nut 5 is screwed, and a lower portion 3b having a skirt portion 11 bulging outward from the central portion. At the same time, cuts are made in a cross shape upward from the bottom, and the longitudinal grooves 12 are formed at equal intervals in the circumferential direction.

  An insertion hole 13 for inserting the tip end of the rotation shaft B is formed on the bottom surface of the mounting member 3 (see FIG. 3A), and the longitudinal groove 12 penetrates the insertion hole 13. Therefore, the lower part 3b of the mounting member 3 is bent inward by a pressing force from the outside, and the inner diameter of the insertion hole 13 can be reduced. Therefore, the tip of the rotary shaft B is inserted into the insertion hole 13 and the skirt part 11 is inserted. When pressure is applied from the outside, the inside of the insertion hole 13 is crimped to the outer peripheral surface of the rotation shaft B, so that the attachment member 3 can be fixed to the rotation shaft B.

  The fastening member 4 is formed with a fitting recess 15 from the bottom surface to the top surface so that it can be fitted to the mounting member 3, and a circular opening 16 communicates with the fitting recess 15 on the top surface. When the fastening member 4 is fitted to the attachment member 3, the bolt portion 10 of the attachment member 3 projects upward from the opening 16.

  The fitting recess 15 is composed of a first fitting recess 15a and a second fitting recess 15b (see FIG. 3B), and the second fitting portion 15b expands downward, When the fastening member 4 is fitted to the attachment member 3, the skirt portion 11 and the second fitting recess 15b are engaged, and the fastening member 4 can be attached to the attachment member 3 in a stable state. Yes.

  Then, when the fastening member 4 is pushed into the mounting member 3 in a state where the skirt portion 11 and the second fitting recess 15b are engaged, the skirt portion 11 has a diameter positioned above the second fitting recess 15b. Since the small first fitting recess 15a presses the skirt portion 11 from above, the lower portion 3b of the mounting member 3 is bent inward so that the inner surface of the insertion hole 13 can be brought into pressure contact with the outer peripheral surface of the rotary shaft B. It has become.

  Further, a notch portion 17 which is a first engaging recess for preventing the knob body 2 from shifting in the rotational direction with respect to the fastening member 4 when the knob body 2 is mounted on the upper side surface of the fastening member 4. An engaging groove 18 that is a second engaging recess for fixing the knob main body 2 so that the knob main body 2 is not easily detached from the tightening member 4 when the knob main body 2 is mounted is provided around the lower portion.

  The tightening nut 5 is formed so as to be screwed into a bolt portion 10 formed on the upper portion of the mounting member 3, and an engaging groove 20 is formed on the upper surface to engage the tip of a minus driver.

  The knob main body 2 is a cap having a circular shape with a size that can be pinched with a finger. A fitting recess 25 for fitting the tightening member 4 is formed at the bottom, and the inner peripheral surface of the fitting recess 25 is opposed to the fitting recess 25. Engage with the engagement protrusion 18 and the engagement groove 18 that are engaged with the notch 17 of the tightening member 4 and prevent the knob body 2 from being displaced in the circumferential direction. An engagement protrusion 27, which is a second engagement portion that prevents the main body 2 from easily coming off, is formed (see FIG. 3C).

  Next, a usage mode of the knob device A having the above configuration will be described. First, as shown in FIG. 4A, the insertion hole 13 of the attachment member 3 is made to correspond to the tip of the rotation shaft B, the tip of the rotation shaft B is inserted into the insertion hole 13, and the attachment member 3 is attached to the rotation shaft B. Attach to the tip (see FIG. 4B). Next, the fastening member 4 is fitted to the mounting member 3 so that the fitting recess 15 of the fastening member 4 corresponds to the mounting member 3 (see FIG. 4C). In this state, the second fitting recess 15b and the skirt portion 11 are engaged with each other to prevent the fastening member 4 from being lowered and mounted in a stable state.

  At the time of fitting, the bolt portion 10 of the mounting member 3 protrudes upward from the opening portion 16 of the tightening member 4, so the tightening nut 5 is pinched with this bolt portion 10 with a finger and turned lightly on the upper surface of the tightening member 4. Screw until it comes into contact (see FIG. 4D). In this state, a space a exists between the attachment member 3 and the tightening member 4 so that the tightening member 4 can be pushed downward.

  Next, the tip of the minus driver is engaged with the engagement groove 20 formed on the upper surface of the tightening nut 5, and the tightening nut 5 is tightened. When the tightening nut 5 is tightened, there is a gap in the space a, so that the tightening member 4 can be forcibly lowered with respect to the mounting member 3. When the tightening member 4 is lowered, the lower end of the first fitting recess 15a of the tightening member 4 is lowered while pressing the upper surface of the skirt portion 11, so that the skirt portion 11 is bent inward and the inner surface of the insertion hole 13 is rotated. The knob support 1 is forcedly pressed against the circumferential surface of the shaft B, and the knob support 1 is fixed to the rotating shaft B (see FIG. 5A).

  When the knob support 1 is fixed to the rotary shaft B, the knob body 2 is attached to the knob support 1. At this time, as shown in FIG. 5 (b), the engagement protrusions 26 formed on the inner wall of the fitting recess 25 are positioned so as to correspond to the notches 17 formed on the side surfaces of the fastening member 4. By fitting the knob support 1 into the fitting recess 25, the knob body 2 can be attached to the knob support 1 as shown in FIG. 5C, and the knob device A is fixed to the rotary shaft B. Can do.

  In this state, since the engaging protrusion 26 of the knob body 2 is engaged with the notch 17 of the fastening member 4, the knob body 2 does not shift in the rotational direction with respect to the fastening member 4. Further, since the engaging protrusion 27 of the knob body 2 is engaged with the engaging groove 18 of the tightening member 4, the knob body 2 is held by the tightening member 4 (knob support 1) with an appropriate holding force. Since it is attached to the knob support 1 in a state, it does not come off from the knob support 1 unless the knob body 2 is intentionally pulled out.

  As described above, when the attachment member 3 is attached to the rotary shaft B, the fastening member 4 is fitted to the attachment member 3, and the fastening nut 5 is fastened to the bolt portion 10 of the attachment member 3, the fastening member 4 becomes the attachment member. 3, the knob support 1 can be fixed to the rotary shaft B by pressing the skirt portion 11 on the rotary shaft B. Therefore, if the knob main body 2 is fitted into the knob support 1 fixed to the rotary shaft B, the rotary shaft B The knob device A can be attached to the rotary shaft, and the knob device A can be attached without subjecting the tip of the rotating shaft to processing such as D-cut.

  And since the center of the rotating shaft B and the center of the knob main body 2 correspond, operation can be performed without feeling uncomfortable feeling that the knob main body 2 revolves during the rotation operation.

  Further, the first engagement portion and the first engagement recess can be engaged with each other by simply fitting the knob main body to the knob support fixed to the rotating shaft, thereby positioning in the circumferential direction. The knob main body can be attached to the knob support with an appropriate holding force by engaging with the second engagement recess, so if the knob main body needs to be replaced due to damage or fouling, it should be a little stronger. If it is pulled out, it can be easily removed and replaced with another knob body without using a tool, and the knob support and knob body are not a single structure, so the number of parts that need to be replaced should be kept to a minimum. Thus, it is possible to provide a knob device that can separate components and contribute to resource saving.

DESCRIPTION OF SYMBOLS 1 Knob support body 2 Knob main body 3 Mounting member 4 Tightening member 5 Clamping nut 11 Skirt part 12 Vertically split groove 15 Fitting recessed part 17 1st engaging recessed part (notch part)
18 Second engagement recess (engagement groove)
25 fitting recessed part 26 1st engaging part (engaging protrusion)
27 Second engagement portion (engagement protrusion)

Claims (2)

A knob device comprising: a knob support attached to the rotary shaft; and a knob body that can be fitted to and removed from the knob support, and having the following requirements.
(A) The knob support is screwed onto a mounting member that is attached to the tip of the rotating shaft, a fastening member that is fitted to the mounting member and supports the knob body, and a bolt formed on the top of the mounting member. (B) The mounting member is formed with a plurality of longitudinally divided grooves on the peripheral surface, and skirts that bulge outward toward the lower side. (C) The fastening member is formed with a fitting recess for fitting with the mounting member, and an opening for projecting the bolt part of the mounting member is formed on the upper surface. (2) The knob The main body is formed so as to cover the tightening member from the upper surface, and a fitting recess for fitting the tightening member is formed on the bottom surface.   A first engaging portion and a second engaging portion project from the inner wall surface of the fitting recess of the knob body, and the first engaging recess and the second engaging portion are formed on the outer peripheral surface of the tightening member. When an engagement recess is formed and the knob body is fitted to the tightening member, the first engagement portion and the first engagement recess engage to perform circumferential positioning, and the second The knob device according to claim 1, wherein the engaging portion and the second engaging recess are engaged to perform axial positioning.

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