JP2008039051A - Relative rotation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relative rotation structure capable of correctly detecting a relative angle position of a rotation member to a reference member of the relative rotation structure. <P>SOLUTION: The rotation member 2 and connecting member 3 for integrally rotating in a manner relative to the reference member 1 engages a face 8 to be engaged of the rotation member 2 at a curled end part tip end 13 of the connection member 3. An engaging recessed part 101 is provided at a circumference collar part of a second circular hole 9 of the rotation member 2 and an engaging protrusion part 102 for engaging with this engaging recessed part 101 is provided at the curled end part 12 of the connection member 3 and a part 14 to be detected is formed at a flange part 11 of the connection member 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a relative rotation structure having a reference member, a rotation member that can rotate relative to the reference member, and a connecting member.

  The conventional relative rotation structure has a structure as shown in FIGS. 4 is an exploded perspective view showing a conventional relative rotating structure, and FIG. 5 is a cross-sectional view thereof.

  As shown in FIGS. 4 and 5, the conventional relative rotation structure includes a reference member 1, a rotation member 2 that can rotate relative to the reference member 1, and the rotation member 2. Thus, the connecting member 3 is configured to be rotatable relative to the reference member 1.

  As shown in FIGS. 4 and 5, the reference member 1 has a first relative rotation surface 4 that faces the rotation member 2, and a reference surface 5 opposite to the first relative rotation surface 4. The first round hole 6 penetrating the reference surface 5 and the first relative rotation surface 4 is provided.

  As shown in FIGS. 4 and 5, the rotating member 2 is opposite to the second relative rotating surface 7 and the second relative rotating surface 7 facing the first relative rotating surface 4 of the reference member 1. And a second round hole 9 penetrating the locked surface 8 and the second relative rotation surface 7. The second round hole 9 of the rotating member 2 has the same diameter as the first round hole 6 of the reference member 1.

  As shown in FIGS. 4 and 5, the connecting member 3 is configured such that the first relative rotation surface 4 of the reference member 1 and the second relative rotation surface 7 of the rotation member 2 face each other. It has a hollow round body portion 10 that fits into one round hole 6 and the second round hole 9 of the rotating member 2. A flange 11 is provided at one end of the round body 10, that is, the lower end shown in FIGS. 4 and 5. As shown in FIG. It comes into contact with the reference surface 5 of the member 1. A curling end 12 is provided at the other end of the round body 10, that is, the lower end shown in FIGS. 4 and 5, and as shown in FIG. The locked surface 8 of the rotating member 2 is locked. With such a configuration, the rotating member 2 and the connecting member 3 are integrated and can be rotated relative to the reference member 1 shown in FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, a notch is formed in a part of the flange portion 11 of the connecting member 3, and this notch serves as the detected portion 14. The detected portion 14 has its angular position detected by a detection unit (not shown), but the relative angular position of the rotating member 2 that rotates together with the connecting member 3 with respect to the reference member 1. Is detected from the reference surface 5 side of the reference member 1.

As prior art document information relating to the invention of this application, for example, Patent Document 1 is known.
JP 2000-105392 A

  The conventional relative rotating structure as described above has the following problems.

  That is, the rotation member 2 and the connection member 3 are connected only by the locking of the locked surface 8 of the rotation member 2 by the curling end tip 13 of the connection member 3. Due to variations in shape, this locking is performed by point contact, and the locking force by the curling end tip 13, that is, the coupling force between the coupling member 3 and the rotating member 2 is weakened. As a result, the rotation member 2 causes a relative angle shift, and erroneous detection of the relative angle of the rotation member 2 with respect to the reference member 1 occurs.

  Therefore, the present invention prevents the relative angular deviation between the rotating member and the connecting member constituting the relative rotating structure, and can accurately detect the relative angular position of the rotating member with respect to the reference member of the relative rotating structure. The object is to provide a relative rotating structure.

  In order to achieve this object, the present invention provides a reference member, a rotation member that can rotate relative to the reference member, and a relative rotation with respect to the reference member that is integrated with the rotation member. A relative rotation structure configured by a movable connecting member, wherein the reference member has a first relative rotation surface facing the rotation member and a side opposite to the first relative rotation surface. A reference surface and a first round hole penetrating the reference surface and the first relative rotation surface, and the rotation member is a second opposite to the first relative rotation surface of the reference member. A relative rotating surface, a locked surface opposite to the second relative rotating surface, the second relative rotating surface and the locked surface having the same diameter as the first round hole of the reference member; A second round hole penetrating through the second round hole, and an engagement recess provided in a peripheral edge portion of the second round hole, and the connecting member includes the reference portion. A hollow circular body portion that fits into the first round hole and the second round hole in a state where the first relative rotation surface of the rotation member and the second relative rotation surface of the rotation member face each other. A flange that is provided at one end of the round body and is in contact with the reference surface of the reference member; and a locked surface of the rotating member that is provided at the other end of the round body. A curling end portion to be locked, an engagement protrusion provided on a peripheral portion of the curling end portion and engaged with the engagement recess of the rotating member, and a detected portion formed on the flange portion It is what you have.

  According to the above-described relative rotating structure of the present invention, the rotating member and the connecting member constituting the relative rotating structure are firmly connected to each other, thereby preventing the relative angular deviation and the relative rotating structure. The relative angular position of the rotating member with respect to the reference member can be accurately detected.

(Embodiment 1)
Hereinafter, the relative rotation structure in Embodiment 1 of the present invention will be described with reference to the drawings. The relative rotation structure according to the present embodiment is provided with an engagement recess on the rotation member of the conventional relative rotation structure and an engagement protrusion that engages with the engagement recess on the connection member. Therefore, the same components as those of the conventional relative rotation structure are denoted by the same reference numerals, and detailed description thereof is omitted.

  1 is an exploded perspective view showing a relative rotation structure in Embodiment 1 of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is an AA sectional view of FIG.

  As shown in FIGS. 1 to 3, two engaging recesses 101 are formed on the peripheral edge of the second round hole 9 of the rotating member 2. The curling end 12 of the connecting member 3 is formed with an engaging projection 102 that engages with the two engaging recesses 101 of the rotating member 2.

  As described above, in the relative rotation structure according to the present embodiment, the connection between the rotation member 2 and the connection member 3 is related to the engagement surface 8 of the rotation member 2 by the curling end tip 13 of the connection member 3. Since the engaging recess 101 of the rotating member 2 and the engaging protrusion 102 of the connecting member 3 are used not only for stopping, the connecting between the rotating member 2 and the connecting member 3 becomes strong, and the rotating member 2 And the relative angle shift | offset | difference of the connection member 3 can be prevented. As a result, the relative angular position of the rotating member 2 with respect to the reference member 1 can be accurately detected as a result.

  Since the relative rotation structure according to the present invention can accurately detect the relative angular position of the rotation member with respect to the reference member, the relative rotation structure is useful as a relative rotation structure constituting a part of an electronic device or the like. Is.

The disassembled perspective view which shows the relative rotation structure in Embodiment 1 of this invention Cross section AA sectional view of FIG. An exploded perspective view showing a conventional relative rotation structure Cross section

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reference member 2 Rotation member 3 Connection member 4 1st relative rotation surface 5 Reference surface 6 1st round hole 7 2nd relative rotation surface 8 Locked surface 9 2nd round hole 10 Round body part 11 Gutter part 12 Curling edge 13 Curling edge tip 14 Detected part 101 Engaging recess 102 Engaging protrusion

Claims (1)

A reference member;
A rotating member capable of rotating relative to the reference member;
It is composed of a connecting member that can rotate relative to the reference member integrally with the rotating member.
A relative rotation structure,
The reference member passes through a first relative rotation surface facing the rotation member, a reference surface opposite to the first relative rotation surface, and the reference surface and the first relative rotation surface. It shall have a first round hole,
The rotating member includes a second relative rotating surface facing the first relative rotating surface of the reference member, a locked surface opposite to the second relative rotating surface, and a reference member A second round hole having the same diameter as the first round hole and penetrating through the second relative rotation surface and the locked surface, and an engagement recess provided in a peripheral portion of the second round hole. ,
The connecting member is fitted into the first round hole and the second round hole with the first relative rotation surface of the reference member and the second relative rotation surface of the rotation member facing each other. A hollow round body, a flange provided at one end of the round body and abutting against the reference surface of the reference member, and a pivot provided at the other end of the round body A curling end portion for locking the locked surface of the member, an engagement protrusion provided on a peripheral edge portion of the curling end portion and engaged with the engagement recess portion of the rotating member, and a flange portion It was assumed to have a detected part formed,
Relative rotation structure.

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