Shaft vibration prevention members, rotary operated electronic components and audio equipment

Abstract

To provide an axial runout prevention member which can prevent increase in size of a device on which an axial runout prevention member is mounted.SOLUTION: An input switching mechanism 30 includes a rotary encoder 32 and an axial runout prevention member 50. The rotary encoder 32 includes a body 34 and a rotary shaft 36 protruding from the body 34. An encoder knob 20 is attached to a tip of the rotary shaft 36. The axial runout prevention member 50 is attached between the rotary encoder 32 and the encoder knob 20. The axial runout prevention member 50 includes: a fixed part 52 fixed to the body 34 of the rotary encoder 32; and a restriction part 54 which is connected to the fixed part 52 and comes into contact with a side surface of the rotary shaft 36. The restriction part 54 directly presses the rotary shaft 36 to enable downsizing of a device on which the input switching mechanism 30 is mounted.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to an anti-vibration member for use in a rotary-operated electronic component. [Background technology]

[0002] Rotary electronic components in which an operating member for rotating a rotary shaft is provided at the tip of the rotary shaft protruding from a main body are widely used in input switching mechanisms, potentiometers, volume adjustment mechanisms, etc. Patent documents 1 and 2 listed below describe a configuration for preventing axial wobble by supporting the operating member from the side in a device equipped with such a rotary electronic component. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-089923 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-150612 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional configuration of supporting the operating member to prevent axial wobble has the problem of increasing the size of the mounted equipment.

[0005] The present invention has been made in view of the above background, and has an object to provide an anti-axial vibration member that can prevent an increase in the size of mounted equipment. [Means for solving the problem]

[0006] In order to solve the above problems, the shaft vibration prevention member of the present invention comprises: The present invention is used in a rotary operation type electronic component in which an operation member for rotating a rotary shaft is provided at the tip of the rotary shaft protruding from a main body, a nut that abuts against the main body portion; The outer diameter is larger than the outer diameter of the nut. With respect to the main body directly or indirectly a fixed portion to be fixed; a restricting portion that is connected to the fixed portion and abuts against a side surface of the rotating shaft between the main body portion and the operating member, and restricts movement of the rotating shaft in a direction perpendicular to the axial direction of the rotating shaft. death, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; The outer diameter of the restricting portion is smaller than the outer diameter of the fixing portion. The present invention is a rotary operation type electronic component in which an operation member for rotating a rotary shaft is provided at the tip of the rotary shaft protruding from a main body, a nut that contacts the main body portion; a fixing portion that has an outer diameter larger than an outer diameter of the nut and is fixed directly or indirectly to the main body portion; and a restricting portion that is connected to the fixing portion and contacts a side surface of the rotating shaft between the main body portion and the operating member, and restricts movement of the rotating shaft in a direction perpendicular to the axial direction, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; The outer diameter of the restricting portion is smaller than the outer diameter of the fixing portion. The audio device of the present invention comprises: a rotary operation type electronic component having an operation member for rotating a rotary shaft provided at a tip of the rotary shaft protruding from a main body, a nut that contacts the main body portion; a fixing portion that has an outer diameter larger than an outer diameter of the nut and is fixed directly or indirectly to the main body portion; and a restricting portion that is connected to the fixing portion and contacts a side surface of the rotating shaft between the main body portion and the operating member, and restricts movement of the rotating shaft in a direction perpendicular to the axial direction, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; An audio device in which the outer diameter of the restricting portion is smaller than the outer diameter of the fixing portion.

[0007] The restricting portion abuts against the side surface of the rotary shaft from a plurality of directions centered on the rotary shaft. death, The restricting portion may be configured so that at least a part of the outer periphery of the rotary shaft does not come into contact with the restricting portion. The outer diameter of the restricting portion may be smaller than the outer diameter of the nut. The outer diameter of the front end of the restricting portion may be smaller than the outer diameter of the rear end of the restricting portion.

[0008] The restricting portion may be provided closer to the tip of the rotary shaft than the fixed portion and may come into contact with a side surface of the rotary shaft in the vicinity of the operating member.

[0009] The outer diameter of the restricting portion may be smaller than the outer diameter of the fixing portion. [Effects of the Invention]

[0010] According to the shaft vibration prevention member of the present invention, it is possible to prevent the size of the mounted equipment from increasing. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of an audio amplifier. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 2 is an exploded cross-sectional view of the input switching mechanism. [Figure 8] FIG. 2 is an exploded cross-sectional view of the input switching mechanism. [Figure 9] FIG. 2 is an external perspective view of an anti-shake member; [Figure 10] 3A and 3B are plan views (front view and side view) and a cross-sectional view of an anti-shake member. [Figure 11] FIG. 4 is a cross-sectional view of an anti-shake member. [Figure 12] FIG. 2 is a plan view (front view) of the shaft vibration prevention member. [Figure 13] FIG. 2 is a plan view (front view) of the shaft vibration prevention member. DETAILED DESCRIPTION OF THE INVENTION

[0012] 1, audio amplifier 10 has a front panel 11, which is provided with switches 12, 13, 14, and 15 for turning the power on and off and switching between various functions, as well as terminals 16, 17, 18, and 19 for various inputs and / or outputs. Front panel 11 also has an encoder knob 20 (operating member), a left / right volume balance adjustment knob 22 (operating member), and a volume knob 24 (operating member).

[0013] As shown in FIGS. 2 to 5, the encoder knob 20 is attached to a rotary encoder 32 (see FIG. 5) that constitutes the input switching mechanism 30. The rotary encoder 32 includes a main body 34 and a rotating shaft 36 that protrudes from the main body 34. The encoder knob 20 is attached to the tip of the rotating shaft 36 and rotates integrally with the rotating shaft 36. The rotary encoder 32 is a rotary electronic component that detects the rotational position of the rotating shaft 36 using the main body 34 and outputs the detected position as a digital signal. In the audio amplifier 10, input switching can be performed by rotating the encoder knob 20 to rotate the rotating shaft 36.

[0014] The rotary encoder 32 is attached to the rear side of the front panel 11 via a support base 40. Specifically, a threaded portion 34a is provided on the distal end (front side) of the main body 34. The threaded portion 34a is cylindrical and surrounds the rotary shaft 36, and has a threaded outer periphery. The support base 40 has an opening 42 through which the rotary shaft 36 and threaded portion 34a are inserted (see FIG. 5). The rotary encoder 32 is sandwiched between the main body 34 and the washer 44 by inserting the rotary shaft 36 and the threaded portion 34a into the opening 42 from the rear side of the support base 40 and threading a nut 46 onto the threaded portion 34a via a washer 44 from the front side, thereby being integrated with the support base 40 (see FIG. 4). The support base 40 thus integrated with the rotary encoder 32 is then fixed to the rear side of the front panel 11 by, for example, screwing, thereby attaching the rotary encoder 32 to the rear side of the front panel 11.

[0015] As shown in FIGS. 3 to 5 and 6 to 8, the input switching mechanism 30 includes an anti-shake member 50, which is attached between the rotary encoder 32 and the encoder knob 20.

[0016] 9(A), (B) and 10(A) to (C), the shaft vibration prevention member 50 includes a fixed portion 52 that is fixed to the main body 34 of the rotary encoder 32, and a restricting portion 54 that is connected to the fixed portion 52 and abuts against the rotating shaft 36. In this embodiment, the fixed portion 52 is formed in a ring shape, and the restricting portion 54 is formed in a disk shape and connected to the tip side of the fixed portion 52. A shaft hole 54a, through which the rotating shaft 36 is inserted, is provided in the center of the restricting portion 54, and the inner periphery of the shaft hole 54a abuts against the rotating shaft 36 (see FIGS. 6 and 7).

[0017] The shaft vibration prevention member 50 is fixed by fitting the fixing portion 52 into a recess 56 (see FIGS. 4 and 8) provided on the front side of the support base 40, thereby supporting the outer periphery (see FIGS. 3 and 7). As described above, the support base 40 is integrated with the main body 34 of the rotary encoder 32. That is, by fixing the fixing portion 52 to the support base 40, the fixing portion 52 is fixed to the main body 34. Note that in this embodiment, the fixing portion 52 is fixed to the main body 34 via the support base 40, but the fixing portion 52 may also be fixed to the main body 34 by fixing (fitting) the fixing portion 52 to a nut 46 or a washer 44. Alternatively, the fixing portion 52 may be directly fixed to the main body 34.

[0018] The shaft vibration prevention member 50 restricts shaft vibration (movement perpendicular to the axial direction of the rotary shaft 36) by abutting the restricting portion 54 (specifically, the inner periphery of the shaft hole 54a) against the outer periphery (side surface) of the rotary shaft 36 (see FIGS. 3, 6, and 7). In this embodiment, the restricting portion 54 is formed in a shape that protrudes forward (toward the tip of the rotary shaft 36) from the fixed portion 52 (see FIGS. 10(B) and 10(C)), and abuts against the rotary shaft 36 further forward (specifically, near the encoder knob 20) (see FIG. 6). The amount of shaft vibration increases toward the front (the tip of the rotary shaft 36). Therefore, by abutting against the rotary shaft 36 further forward, as in this embodiment, shaft vibration can be effectively restricted (suppressed).

[0019] In this embodiment, the outer diameter of the restricting portion 54 is formed to be smaller than the outer diameter of the fixed portion 52 (see FIGS. 10(B) and 10(C)). This reduces the adverse effects on the operability of the encoder knob 20 and the texture when the encoder knob 20 is operated. That is, in the input switching mechanism 30, in order to effectively restrict shaft wobble, the restricting portion 54 is provided forward of the fixed portion 52, and is configured so that the restricting portion 54 abuts against the side surface of the rotating shaft 36 near the encoder knob 20 (see FIG. 6).

[0020] For this reason, due to manufacturing errors, etc., the front end of the regulating portion 54 may come into contact with the encoder knob 20. In such a case, if the outer diameter of the regulating portion 54 is large, that is, if the area of ​​the front end of the regulating portion 54 is large and the area of ​​the portion that comes into contact with the encoder knob 20 is large, the frictional resistance that occurs between the encoder knob 20 and the regulating portion 54 will also increase, resulting in problems such as reduced operability of the encoder knob 20 and a deterioration in the texture when operating the encoder knob 20.

[0021] In contrast, in this embodiment, the outer diameter of the regulating portion 54 is formed smaller than the outer diameter of the fixing portion 52, and even if the regulating portion 54 comes into contact with the encoder knob 20, the area of ​​the portion that comes into contact with the encoder knob 20 is reduced, thereby reducing the adverse effects on the operability of the encoder knob 20 and the texture when operating the encoder knob 20.

[0022] As described above, the shaft vibration prevention member 50 of the present invention is configured to prevent shaft vibration by directly holding down (supporting) the rotating shaft 36 of the rotary encoder 32, and therefore it is possible to reduce the size of the device on which it is mounted (in this embodiment, the audio amplifier 10) compared to the conventional configuration in which shaft vibration is prevented by holding down (supporting) the encoder knob 20.

[0023] In the above embodiment, the inner periphery of the restricting portion 54 (shaft hole 54a) is a flat surface (see FIG. 10C), and the restricting portion 54 is in surface contact with the rotary shaft 36 (see FIGS. 6 and 7), but the present invention is not limited to this. The restricting portion 54 comes into sliding contact with the rotary shaft 36 as the encoder knob 20 is rotated, and therefore the larger the area of ​​the portion that abuts against the rotary shaft 36, the greater the resistance, resulting in problems such as reduced operability and a poor texture when operated.

[0024] For this reason, for example, as in the shaft vibration prevention member 110 shown in Fig. 11, a restricting portion 112 (shaft hole) having a convex cross section that tapers toward the rotating shaft 36 may be provided, and this restricting portion 112 may be configured to be in line contact with the rotating shaft 36. In this way, by reducing the area of ​​the portion that abuts against the rotating shaft 36, it is possible to prevent problems such as the aforementioned deterioration in operability and deterioration in texture when operated. Note that in the description using Fig. 11 and subsequent drawings, the same reference numerals will be used to designate the same members as in the above-described embodiment, and description thereof will be omitted.

[0025] Furthermore, in the above embodiment, an example has been described in which the entire inner periphery of the restricting portion 54 (shaft hole 54a) abuts against the rotating shaft 36 (see FIG. 10(A)), but the present invention is not limited to this. For example, a configuration in which the restricting portion 54 does not abut against part of the outer periphery of the rotating shaft 36 may be used, such as the shaft vibration prevention member 120 shown in FIG. 12(A), the shaft vibration prevention member 122 shown in FIG. 12(B), and the shaft vibration prevention member 130 shown in FIG. 13(A), and the shaft vibration prevention member 132 shown in FIG. 13(B).

[0026] 12(A) shows an example in which the shape of the shaft hole 124 is determined so that two portions abut against the rotary shaft 36 and the remaining portions do not abut against the rotary shaft 36, and FIG. 12(B) shows an example in which the shape of the shaft hole 126 is determined so that four portions of the restricting portion 54 abut against the rotary shaft 36 and the remaining portions do not abut against the rotary shaft 36. Furthermore, FIG. 13(A) shows an example in which the shaft hole 134 is triangular so that three points abut against the rotary shaft 36 and the remaining points do not abut against the rotary shaft 36, and FIG. 13(B) shows an example in which the shaft hole 136 is square so that four points abut against the rotary shaft 36 and the remaining points do not abut against the rotary shaft 36.

[0027] In the above embodiment, the present invention has been described as being applied to the input switching mechanism 30 to which the encoder knob 20 is attached, but the present invention may also be applied to a potentiometer (a rotary electronic component) to which the left / right volume balance adjustment knob 22 is attached, or a volume (a rotary electronic component) to which the volume knob 24 is attached. Furthermore, the present invention may also be applied to rotary electronic components mounted on devices other than the audio amplifier 10. [Explanation of symbols]

[0028] 10 Audio Amplifier 11 Front Panel 12, 13, 14, 15 switches Terminals 16, 17, 18, and 19 20 Encoder knob (operating member) 22 Left and right volume balance adjustment knob (operating part) 24 Volume knob (operating part) 30 Input switching mechanism 32 Rotary encoder (electronic component) 34 Main body 34a Threaded part 36 Rotation axis 40 Support Base 42 Aperture 44 Washer 46 Nut 50, 110, 120, 122, 130, 132 Shaft vibration prevention member 52 Fixed part 54, 112 Regulatory Department 54a, 124, 126, 134, 136 shaft hole 56 Recess

Claims

1. The present invention is used in a rotary operation type electronic component in which an operation member for rotating a rotary shaft is provided at the tip of the rotary shaft protruding from a main body, a nut that abuts against the main body portion; a fixing portion having an outer diameter larger than an outer diameter of the nut and fixed directly or indirectly to the main body portion; a restricting portion that is connected to the fixed portion and abuts against a side surface of the rotation shaft between the main body portion and the operating member, and restricts movement of the rotation shaft in a direction perpendicular to the axial direction, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; An anti-shake member in which the outer diameter of the front end of the restricting portion is smaller than the outer diameter of the fixing portion.

2. the restricting portion abuts against a side surface of the rotary shaft from a plurality of directions around the rotary shaft, The shaft vibration prevention member according to claim 1 , wherein the restricting portion does not come into contact with at least a portion of the outer periphery of the rotary shaft.

3. An anti-shake member as described in claim 1, wherein the outer diameter of the regulating portion is smaller than the outer diameter of the nut.

4. An anti-shake member as described in claim 1, wherein the outer diameter of the front end of the regulating portion is smaller than the outer diameter of the rear end of the regulating portion.

5. A rotary operation type electronic component having an operating member for rotating a rotary shaft protruding from a main body portion at the tip of the rotary shaft, a nut that contacts the main body portion; a fixing portion that has an outer diameter larger than an outer diameter of the nut and is fixed directly or indirectly to the main body portion; and a restricting portion that is connected to the fixing portion and contacts a side surface of the rotating shaft between the main body portion and the operating member, and restricts movement of the rotating shaft in a direction perpendicular to the axial direction, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; A rotary-operated electronic component in which the outer diameter of the front end of the restricting portion is smaller than the outer diameter of the fixing portion.

6. A rotary electronic component is provided with an operating member for rotating a rotary shaft at the tip of the rotary shaft protruding from a main body, a nut that contacts the main body portion; a fixing portion that has an outer diameter larger than an outer diameter of the nut and is fixed directly or indirectly to the main body portion; and a restricting portion that is connected to the fixing portion and contacts a side surface of the rotating shaft between the main body portion and the operating member, and restricts movement of the rotating shaft in a direction perpendicular to the axial direction, the restricting portion is provided closer to the tip of the rotary shaft than the fixed portion and abuts against a side surface of the rotary shaft closer to the tip of the rotary shaft than the fixed portion; An audio device in which the outer diameter of the front end of the restricting portion is smaller than the outer diameter of the fixing portion.

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