JPH0613103U - Rotatable electrical parts - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to reliably prevent the rotary shaft from being erroneously inserted into the insertion hole of the drive body in a state where the rotary shaft is rotated 180 ° from the predetermined position. A first scraping portion 32 having a D-shaped cross section, to which the knob 11 is attached, is provided at one end of the rotary shaft 12, and a pair of flat surfaces are axially offset from each other at the other end of the rotary shaft 12. The second scraping portions 35 and 36 forming the step portion 27 of
Driving body 15 inserted into the second scraping portions 35 and 36
A second step 39 corresponding to the first step 37 is provided in the insertion hole 38 of FIG. [Effect] When the rotary shaft 12 is at the proper position with respect to the driving body 15, the rotary shaft 12 can be inserted to a predetermined insertion position where the second step 39 corresponds to the first step 37,
The rotary shaft 12 is 180 ° from the proper position with respect to the driving body 15.
In the rotated state, the insertion of the rotary shaft 12 is blocked midway.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rotary operation type electric component such as a rotary switch and a rotary volume, and more particularly to a connecting structure of a rotary shaft and a driving body included in the rotary operation type electric component.

[0002]

[Prior art]

 Generally, in a rotary operation type electric component, when a knob attached to one end of a rotary shaft is rotated, a drive body inserted into the other end of the rotary shaft rotates integrally, and a sliding member attached to the drive body is rotated. The pendulum and click spring slide on the opposing resistance board and click plate.

FIG. 5 is an exploded perspective view of a rotary shaft and a driving body included in this type of conventional rotary operation type electric component, and FIG. 6 is an explanatory view showing a portion A of the rotary shaft in FIG.

In the conventional rotary operation type electric component shown in FIG. 5, the rotary shaft 1 is composed of a large diameter portion 1a and a small diameter portion 1b, and one end of the large diameter portion 1a is parallel to the axial direction. A first scraping portion 2 having one flat surface is provided, and the cross section of the first scraping portion 2 is formed in a D shape. Further, at the end of the other small-diameter portion 1b, there are provided second scraping portions 3 and 4 having two flat surfaces that are symmetrical with respect to the axis and are parallel to each other. The drop sections 3 and 4 are oval in cross section. A knob (not shown) is fitted and fixed to the first scraping portion 2 of the rotating shaft 1, and the knob has the same shape as the first scraping portion 2, that is, a D-shaped cross section. Holes are provided. Further, an insertion hole 6 provided in the driving body 5 is fitted and inserted into the second abrasion portions 3 and 4, and the insertion hole 6 is the same as the second abrasion portions 3 and 4. The shape, that is, an oval cross section having two flat surfaces 7 and 8 which are symmetrical with respect to the axis and are parallel to each other.

The rotary shaft 1 is inserted into a rotary bearing (not shown), and the driving body 5 is housed together with other components in a casing (not shown), whereby a rotary operation type electric component is constituted. In use, the above-mentioned knob is attached to the first scraping portion 2 of the rotary shaft 1, and when the operator rotates the knob, the rotary shaft 1 and the driving body 5 are integrated with each other in association with the knob. Then, a slider (not shown) attached to the driving body 5 slides on the resistor substrate, and the resistance value changes according to the rotation angle of the knob.

[0006]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, since the second scraping portions 3 and 4 of the rotary shaft 1 and the insertion hole 6 of the driving body 5 are formed symmetrically about the axis, respectively, On the other hand, even when the rotary shaft 1 is rotated by 180 ° from the predetermined position, the second scraped portions 3 and 4 of the rotary shaft 1 can be inserted into the insertion holes 6. When the drive body 5 and the rotary shaft 1 are erroneously assembled in this way, the knob and the drive body 5 are directional because the knob is inserted into the first scraping portion 2 of the rotary shaft 1. However, there was a problem that the relative position of was shifted by 180 °. At present, the operator is trying to visually check the above-mentioned incorrect assembly, but it was not possible to completely prevent the incorrect assembly.

The present invention has been made in view of the situation in the prior art as described above, and an object thereof is to erroneously insert a rotary shaft into a through hole of a driving body while the rotary shaft is rotated 180 ° from a predetermined position. The object of the present invention is to provide a rotary operation type electric component capable of surely preventing the electric shock.

[0008]

[Means for Solving the Problems]

 To achieve this object, the present invention provides a rotary shaft having a first scraping portion having a D-shaped cross section at one end and a second scraping portion having an oval cross section at the other end; A rotary operation type electric component comprising: a knob attached to the scraping portion; and a drive body that is inserted into the second scraping portion and rotates integrally with the rotating shaft, wherein the second scraping portion is provided. A pair of flat surfaces that form the above are displaced in the axial direction of the rotating shaft to provide a first step portion, and the driving body is provided with a second step portion corresponding to the first step portion. .

[0009]

[Action]

 According to the present invention, as described above, the pair of flat surfaces forming the second scraped portion of the rotary shaft are displaced in the axial direction of the rotary shaft to provide the first step portion, and at the same time, the driver is provided with the first flat surface. Since the second step corresponding to the step is provided, when the rotating shaft is rotated to a predetermined position with respect to the driving body and then the second scraped portion of the rotating shaft is inserted into the insertion hole of the driving body, The rotary shaft is inserted to a predetermined insertion position in a state where the second step portion is aligned with the first step portion. On the other hand, if the second scraping portion is inserted into the insertion hole of the driving body in a state where the rotary shaft is rotated 180 ° from the predetermined position, the first step portion does not correspond to the second step portion. Therefore, the insertion of the rotary shaft is prevented on the way. As a result, it is possible to prevent the rotary shaft from being erroneously inserted into the insertion hole of the drive body in a state where the rotary shaft is rotated 180 ° from the predetermined position.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a rotary shaft and a driving body included in an embodiment of the rotary operation type electric component of the present invention, FIG. 2 is an explanatory view showing a portion B of the rotary shaft in FIG. 1, and FIG. 3 is a rotary operation type. FIG. 4 is an assembly sectional view showing an embodiment of the electric component, and FIG. 4 is an assembly sectional view showing a state where the rotary operation type electric component of FIG. 3 is erroneously assembled.

The electrical component of this embodiment shown in FIG. 3 has a rotary shaft 12 having a knob 11 attached to one end thereof, an outer shaft 13 having the rotary shaft 12 inserted therethrough, and a rotatably supporting outer shaft 13. Rotating bearing 14, a drive body 15 inserted into the other end of the rotary shaft 12, a slider receiver 16 connected to the drive body 15, and another drive body inserted into the outer shaft 13. 17, another slider receiver 18 connected to the other driving body 17, and a casing 19 connected to the rotary bearing 14 and containing the driving bodies 15, 17 and the slider receivers 16, 18 and the like. have.

The driving body 15 has a speed nut 21 which is inserted into the other end of the rotary shaft 12 and can be locked to an inclined portion 20 formed at the other end, and a click groove provided in the casing 19. A click spring 23 engaging with 22 is attached. When the rotating shaft 12 rotates, a click feeling is given to the rotating shaft 12 via the click spring 23. The slider receiver 16 includes a slider 25 that is in sliding contact with a resistance substrate 24 fixed to a casing 19. Similarly, a click spring 27 that engages with the click groove 26 provided in the rotary bearing 14 and gives a click feeling to the outer shaft 13 is attached to the separate drive body 17, and The slider receiver 18 is provided with sliders 30 and 31 which are in sliding contact with resistance substrates 28 and 29 fixed to the casing 19, respectively.

As shown in FIG. 1, the end of the large-diameter portion 12a of the rotary shaft 12 has a D-shaped cross section as in the conventional case, and has one flat surface parallel to the axial direction. A first scraping portion 32 having is provided. The hole 33 of the knob 11 attached to the first scraping portion 32 also has the same shape as the first scraping portion 32, that is, a flat surface portion 34 having a D-shaped cross section and facing the first scraping portion 32. Is provided. A display portion 11a is provided on the surface of the knob 11, and as shown in FIG. 3, when the rotary shaft 12 rotates to a predetermined position with respect to the driving body 15, the display portion 11a is positioned above. As shown in FIG. 4, when the rotary shaft 12 is rotated 180 ° from the predetermined position, the display portion 11a is located below.

As shown in FIG. 1, the end of the small diameter portion 12b of the rotating shaft 12 is formed in a so-called oval shape, and has two flat surfaces parallel to the axial direction and parallel to each other. Two scraping portions 35 and 36 are provided. Then, as shown in FIG. 2, one of the scraping portions 35 is set to have the other scraping portion 36 shorter by a predetermined dimension L, and the first step portion 37 adjacent to the other scraping portion 36 is formed as described above. It is provided on the small diameter portion 12b. Further, the insertion hole 38 of the driving body 15 is provided with a second step 39 corresponding to the first step 37.

In this embodiment, as shown in FIG. 3, the rotation shaft 12 is rotated to a predetermined position with respect to the driving body 15, and then the second scraping portions 35 and 36 of the rotation shaft 12 are driven. When the rotary shaft 12 is inserted into the insertion hole 38 of the drive member 15, the rotary shaft 12 is inserted to a predetermined insertion position with the second step 39 of the driving body 15 aligned with the first step 37 of the small diameter part 12b. As a result, the speed nut 21 attached to the driving body 15 is locked to the inclined portion 20 of the rotary shaft 12, so that the rotary shaft 12 is prevented from coming off.

On the other hand, as shown in FIG. 4, while the rotary shaft 12 is rotated 180 ° from the predetermined position, the second scraped portions 35 and 36 of the rotary shaft 12 are inserted into the insertion holes 38 of the driving body 15. When it is inserted into the rotary shaft 12, the first step portion 37 abuts against the end surface of the driving body 15, that is, the first step portion 37 does not correspond to the second step portion 39. Is blocked on the way. As a result, since the speed nut 21 is not locked to the tilted portion 20, the rotary shaft 12 slips out of the driving body 15, and the operator visually checks that the rotary shaft 12 and the driving body 15 are incorrectly assembled. Without knowing.

In the embodiment thus configured, it is possible to reliably prevent the rotary shaft 12 from being erroneously inserted into the insertion hole 38 of the driving body 15 in a state where the rotary shaft 12 is rotated 180 ° from the predetermined position. In this embodiment, the length dimension of the first scraping portion 36 adjacent to the first step portion 37 is set to be larger than the length dimension of the other scraping portion 35, and the first step portion 37 is set. Although the second step portion 39 corresponding to the first step portion is provided in the driving body 15, the present invention is not limited to this, and the length dimension of one scraping portion adjacent to the first step portion is the same as the other scraping portion. May be set smaller than the length dimension of the second step portion so that the second step portion corresponding to the first step portion projects from the end face of the driving body toward the first step portion.

[0018]

[Effect of device]

 Since the present invention is configured as described above, it is possible to prevent the rotary shaft from being erroneously inserted into the drive body in a state where the rotary shaft is displaced by 180 ° from the predetermined position, so that the drive body and the rotary shaft are securely assembled. be able to.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rotary shaft and a driving body included in an embodiment of a rotary operation type electric component of the present invention.

FIG. 2 is an explanatory view showing a portion B of the rotary shaft of FIG.

FIG. 3 is an assembled sectional view showing an embodiment of a rotary operation type electric component.

FIG. 4 is an assembly cross-sectional view showing a state where the rotary operation type electric component of FIG. 3 is erroneously assembled.

FIG. 5 is an exploded perspective view of a rotary shaft and a driving body included in a conventional rotary operation type electric component.

6 is an explanatory diagram showing a portion A of the rotary shaft of FIG.

[Explanation of symbols]

 11 Knob 12 Rotating shaft 15 Driving body 32 First scraping portion 33 Hole 34 Flat surface portion 35, 36 Second scraping portion 37 First step portion 38 Insertion hole 39 Second step portion

Claims (1)

[Scope of utility model registration request] 1. A rotary shaft having a first scraping portion having a D-shaped cross section at one end and a second scraping portion having an oval cross section at the other end, and a rotary shaft mounted on the first scraping portion. A rotary operation type electric component having a knob and a driving body that is inserted into the second scraping portion and rotates integrally with the rotary shaft. A pair of flat plates that form the second scraping portion. A rotary operation type electric component, characterized in that a first step portion is provided by shifting a surface in an axial direction of the rotating shaft, and a second step portion corresponding to the first step portion is provided on the driving body. .