JP6118639B2 - Guide mechanism - Google Patents

Description

  The present invention relates to a guide mechanism.

  As a guide mechanism for rotating the outer cylinder with respect to the inner cylinder and rotating the inner cylinder or moving it straight in the axial direction, a guide hole is formed in the outer cylinder, and the cylindrical roller is guided by the guide cylinder. What is fixed to the inner cylinder in a state of being inserted into the hole is generally used.

  On the other hand, a click stop mechanism may be employed to give the user a click feeling at a specific position when rotating the outer cylinder. In one click stop mechanism, a spring and a click ball are arranged in a through hole provided in a solid rotating ring, and the click ball is pressed against the wall surface of the cylindrical portion provided with the click groove by the spring ( For example, see Patent Document 1).

Japanese Patent Laid-Open No. 10-221484

  However, in general, in the above-described guide mechanism, the play between the guide hole and the roller is eliminated by adjusting the diameter of the roller by covering the roller with a cylindrical boss. For this reason, it takes a lot of labor at the time of manufacture, and it is necessary to prepare many bosses having different inner diameters and thicknesses for adjustment for each diameter of the rollers. Further, the above-described click stop mechanism has a large number of parts and a complicated structure.

  The present invention has been made in view of the above problems, and an object of the present invention is to obtain a guide mechanism free from rattling without using a rotating roller.

  In order to solve the above problems, the present invention is configured as follows.

The guide mechanism according to the present invention includes an inner cylinder part, an outer cylinder part, a guide hole formed in the outer cylinder part, a slider inserted into the guide hole and fixed to the inner cylinder part at the fixing part, a slide A first cantilever extending from the fixed part of the moving element; a first convex part formed on the first cantilever and contacting one wall surface of the guide hole; and a guide extending from the fixed part An abutting portion that abuts against the other wall surface of the hole facing the one wall surface. The contact portion is an extended portion extending from the fixed portion of the slider and forms a contact surface that comes into surface contact with the other wall surface. The height from the first cantilever beam to the contact surface of the slider is high. And the height of the fixed part are equal.

  As a result, rattling between the guide hole and the slider is eliminated by the biasing force based on the elasticity of the first cantilever. Therefore, adjustment with the above-described boss or the like is not required, and labor is not required, and there is no backlash between the guide hole and the slider with a small number of parts.

  In addition to the above guide mechanism, the guide mechanism according to the present invention may be as follows. In this case, the guide mechanism further includes a first concave portion formed at a position where the first convex portion is to be locked by the click stop mechanism on the one wall surface on which the first convex portion abuts.

  As a result, the click stop mechanism is realized with a smaller number of parts.

  In addition to the above guide mechanism, the guide mechanism according to the present invention may be as follows. In this case, the guide mechanism includes a second cantilever extending from the fixed portion of the slider in the opposite direction to the first cantilever and a guide hole formed in the second cantilever. The second convex part that contacts the one wall surface described above and the second convex part that is formed at a position where the second convex part should be locked by the click stop mechanism on the one wall surface that the second convex part contacts. And a recess. The first and second recesses are respectively formed at both ends of the guide hole.

  In addition to the above guide mechanism, the guide mechanism according to the present invention may be as follows. In this case, the first recess is formed in the intermediate portion of the guide hole.

  In addition to the above guide mechanism, the guide mechanism according to the present invention may be as follows. In this case, the contact portion includes a third cantilever extending from the fixed portion of the slider and a third cantilever formed on the third cantilever and contacting the other wall surface of the guide hole. A convex portion and a third concave portion formed at a position where the third convex portion is to be locked by the click stop mechanism on the other wall surface which is in contact with the third convex portion.

  ADVANTAGE OF THE INVENTION According to this invention, the guide mechanism which employ | adopted the click stop without backlash in the guide mechanism which guides the other movement with respect to one of an inner cylinder part and an outer cylinder part can be provided.

FIG. 1 is a perspective view showing a configuration of a guide mechanism according to Embodiment 1 of the present invention. FIG. 2 is a side view showing the configuration of the guide mechanism according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing the inner cylinder portion in FIG. 1. FIG. 4 is a perspective view showing the outer cylinder portion in FIG. 1. FIG. 5 is a front view showing the slider in the first embodiment. FIG. 6 is a front view showing the slider in the second embodiment. FIG. 7 is a perspective view showing the slider in the second embodiment. FIG. 8 is a front view showing the slider in the third embodiment. FIG. 9 is a perspective view showing a slider in the third embodiment. FIG. 10 is a development view illustrating an example of a guide hole in the guide mechanism according to the third embodiment. FIG. 11 is a development view illustrating another example of the guide hole in the guide mechanism according to the third embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.

  FIG. 1 is a perspective view showing a configuration of a guide mechanism according to Embodiment 1 of the present invention. FIG. 2 is a side view showing the configuration of the guide mechanism according to Embodiment 1 of the present invention. 3 is a perspective view showing the inner cylinder portion 1 in FIG. 1, and FIG. 4 is a perspective view showing the outer cylinder portion 2 in FIG.

  The guide mechanism shown in FIG. 1 has an inner cylinder part 1, an outer cylinder part 2, and a substantially H-shaped slider 3.

  In this guide mechanism, the inner cylinder part 1 shown in FIG. 3 is inserted into the outer cylinder part 2 shown in FIG. A guide hole 21 is formed in the outer tube portion 2 in a groove shape, and the slider 3 is inserted into the guide hole 21 and is slidable in the guide hole 21 at a substantially center. The formed fixing portion 31 is fixed to the inner cylinder portion 1. In this embodiment, the slider 3 is screwed into the screw hole 11 of the inner cylinder portion 1. The slider 3 is curved along the outer peripheral surface of the inner cylinder portion 1 and is fixed in surface contact with the inner cylinder portion 1.

  Although not shown in FIGS. 1 and 2, as shown in FIG. 4, two guide holes 21 are provided in the circumferential direction, and the slider 3 is inserted into each guide hole 21. It is fixed to the inner cylinder part 1.

  The slider 3 is, for example, a molded product of polyacetal resin. The slider 3 is formed with a cantilever 32 extending from the fixed portion 31, and the tip of the cantilever 32 is in contact with one wall surface 21 a along the longitudinal direction of the guide hole 21. The convex part 32a which touches is formed. Further, the slider 3 is formed with a contact portion 33 that extends from the fixed portion 31 and contacts the other wall surface 21 b of the guide hole 21 that faces the one wall surface 21 a.

  In the first embodiment, the fixing portion 31 of the slider 3 is formed with a screw hole for screwing, and the contact portion 33 is an extended portion extending from the fixing portion 31 in the opposite direction to the other. An abutting surface that is in surface contact with the wall surface 21b is formed.

  FIG. 5 is a front view showing the slider 3 in the first embodiment. The height h1 from the cantilever 32 to the contact surface of the contact portion 33 in the slider 3 is slightly lower than the height H in the axial direction of the guide hole 21, and the tip of the convex portion 32 a in the slider 3. The height h2 from the contact portion 33 to the contact surface is higher than the axial height H of the guide hole 21 (h1 <H <h2).

  By adopting such a shape, the projecting portion 32a abuts against one wall surface 21a, whereby the slider 3 is biased based on the elasticity of the cantilever 32, and the abutting portion 33 abuts against the other wall surface 21b. It will be in contact. Thereby, the inner cylinder part 1 is correctly positioned with respect to the wall surface 21b of the outer cylinder part 2 in an axial direction.

  Further, a concave portion 22 is formed at a position where the convex portion 32a should be locked by the click stop mechanism on the wall surface 21a with which the convex portion 32a abuts. Thereby, both the cam mechanism (guide mechanism) and the click stop mechanism are realized by the shape of the slider 3. In the first embodiment, the recess 22 is provided at the end of the guide hole 21.

  Next, the operation of the guide mechanism according to the first embodiment will be described.

  The cantilever 32 is elastically deformed by the projection 32 a of the slider 3 abutting against the wall surface 21 a of the guide hole 21, and the abutment portion 33 of the slider 3 is It contacts the wall surface 21b with pressure.

  In this state, the inner tube portion 1 is rotatable with respect to the outer tube portion 2 within the range in which the slider 3 can move within the wall surfaces 21 a and 21 b of the outer tube portion 2, that is, the guide hole 21. Yes.

  When the inner cylindrical portion 1 rotates relative to the outer cylindrical portion 2 and the convex portion 32 a moves to the position of the concave portion 22, the convex portion 32 a enters the concave portion 22 based on the elasticity of the cantilever 32. Stopped.

  An optical element is provided in the hollow portion of the inner cylinder portion 1, and the optical element is operated by rotating the inner cylinder portion 1. In accordance with the operation of the optical element, the optical characteristics with respect to light incident on the optical element change along the axial direction (that is, the optical axis). And the recessed part 22 is provided in the position (rotation angle) used as a specific optical characteristic, A user arrange | positions the inner cylinder part 1 in the position based on a click stop mechanism, The specific optical characteristic Can be specified.

  In the first embodiment, the polarizing plate perpendicular to the axial direction is fixed in the hollow portion of the inner cylinder portion 1, and the polarizing plate is also rotated by rotating the inner cylinder portion 1. As the polarizing plate rotates, the polarization characteristics with respect to the light incident on the polarizing plate change along the axial direction. And the recessed part 22 is provided in the position (rotation angle) used as a specific polarization characteristic, and a user arrange | positions the inner cylinder part 1, ie, a polarizing plate, in the position based on a click stop mechanism, Specific polarization characteristics can be specified.

  As described above, the guide mechanism according to the first embodiment includes the inner cylinder portion 1, the outer cylinder portion 2, the guide hole 21 formed in the outer cylinder portion 2, and the fixed portion 31 inserted through the guide hole 21. In the inner cylinder portion 1, a cantilever 32 extending from the fixed portion 31 of the slider 3, and one wall surface 21 a of the guide hole 21 formed in the cantilever 32. A convex portion 32 a that abuts and a contact portion 33 that extends from the fixed portion 31 and abuts against the other wall surface 21 b that faces the one wall surface 21 a of the guide hole 21.

  Thereby, rattling does not occur between the guide hole 21 and the slider 3 due to the urging force based on the elasticity of the cantilever 32. Therefore, adjustment with the above-described boss or the like is not required, and it is possible to configure a guide mechanism that does not require labor and has no backlash between the guide hole 21 and the slider 3 with a small number of parts.

  Further, the guide mechanism according to the first embodiment includes the concave portion 22 formed at a position where the convex portion 32 should be locked by the click stop mechanism on the one wall surface 21a with which the convex portion 32a contacts.

  Thereby, both a cam mechanism (guide mechanism) and a click stop mechanism are realized with a small number of parts.

Embodiment 2. FIG.

  The guide mechanism according to the second embodiment of the present invention has a slider and a guide hole having different shapes from those of the first embodiment.

  FIG. 6 is a front view showing the slider 103 in the second embodiment, and FIG. 7 is a perspective view showing the slider 103 in the second embodiment.

  As shown in FIGS. 6 and 7, similarly to the first embodiment, the slider 103 in the second embodiment is fixed to the inner cylinder portion 1 in the fixing portion 131 and further extended from the fixing portion 131. A cantilever 132 is formed, and a protrusion 132 a that abuts against one wall surface 21 a of the guide hole 21 is formed at the tip of the cantilever 132. Further, the slider 103 is formed with an abutting portion 133 that extends from the fixed portion 131 and abuts against the other wall surface 21 b facing the one wall surface 21 a of the guide hole 21.

  Furthermore, the slider 103 according to the second embodiment is formed with a cantilever 134 extending from the fixed portion 131 in the opposite direction to the cantilever 132. The cantilever 134 has a guide A convex portion 134 a that abuts against the one wall surface 21 a of the hole 21 is formed.

  On the other hand, in the guide hole 21 of the outer cylinder part 2 in the second embodiment, the same as the concave part 22 at the position where the convex part 132a should be locked by the click stop mechanism on the one wall surface 21a to which the convex part 132a abuts. The concave portion similar to the concave portion 22 is formed at the position where the convex portion 134a should be locked by the click stop mechanism on the one wall surface 21a with which the convex portion 134a abuts. The two recesses are formed at both ends of the guide hole 21, respectively.

  In addition, since the other structure of the guide mechanism which concerns on Embodiment 2 is the same as that of Embodiment 1, the description is abbreviate | omitted.

  As described above, according to the second embodiment, a click stop can be realized at both ends of the rotation range of the inner cylindrical portion 1, and the user designates the optical characteristics corresponding to both ends based on the click stop mechanism. be able to.

Embodiment 3 FIG.

  The guide mechanism according to the third embodiment of the present invention has a slider and a guide hole having different shapes from those of the first and second embodiments.

  FIG. 8 is a front view showing the roller 203 in the third embodiment, and FIG. 9 is a perspective view showing the slider 203 in the third embodiment.

  FIG. 10 is a development view illustrating an example of the guide hole 221 in the guide mechanism according to the third embodiment.

  As shown in FIGS. 8 to 10, similarly to the first embodiment, the slider 203 in the third embodiment is fixed to the inner cylinder portion 1 at the fixing portion 231, and further extends from the fixing portion 231. A cantilever 232 is formed, and a protrusion 232 a that abuts against one wall surface 221 a of the guide hole 221 is formed at the tip of the cantilever 232. Further, the slider 203 is formed with an abutting portion 233 that extends from the fixing portion 231 and abuts against the other wall surface 221b facing the one wall surface 221a of the guide hole 221.

  Further, the slider 203 according to the second embodiment is formed with a cantilever beam 234 extending from the fixing portion 231, and the other wall surface 221 b of the guide hole 221 is formed on the cantilever beam 234. Convex part 234a which contacts is formed.

  On the other hand, in the guide hole 221 of the outer cylinder part 2 in the third embodiment, the same as the concave part 22 at the position where the convex part 232a should be locked by the click stop mechanism on the one wall surface 21a to which the convex part 232a abuts. Are formed on the other wall surface 221b on which the convex portion 234a abuts at a position where the convex portion 234a should be locked by the click stop mechanism.

  In the third embodiment, the recesses 222 and 226 are provided at the end of the guide hole 221, and the recesses 223 to 225 are provided at intermediate portions of both ends of the guide hole 221.

  In addition, since the other structure of the guide mechanism which concerns on Embodiment 3 is the same as that of Embodiment 1, the description is abbreviate | omitted.

  Further, in the third embodiment, similarly to the first embodiment, one cantilever 232 and one convex portion 232a are provided on one wall surface 221a side of the guide hole 221. Similarly, you may make it have two cantilever beams and two convex parts in the one wall surface 221a side of the guide hole 221. FIG.

  As described above, according to the third embodiment, the convex portion 232a of the slider 203 is formed by the click stop mechanism at different positions (rotation angles) on the one wall surface 221a and the other wall surface 221b of the guide hole 221. Since 234a is locked, it becomes easy to set various positions for locking the convex portions 232a, 234a of the slider 203 by the click stop mechanism.

  For example, the slider is locked by a click stop mechanism at both ends of one wall surface 221a of the guide hole 221 as in the second embodiment, and the click stop mechanism is intermediate between both ends of the other wall surface 221b of the guide hole 221. With this, the slider can be locked.

  Each embodiment described above is a preferred example of the present invention, but the present invention is not limited to these, and various modifications and changes can be made without departing from the scope of the present invention. It is.

  For example, in the first embodiment, the recess 22 is formed at the end of the guide hole 21, but the recess 22 may be formed at an intermediate portion between one end and the other end. .

  In the first to third embodiments, the guide holes 21 and 221 are formed perpendicular to the axial directions of the inner cylinder portion 1 and the outer cylinder portion 2, but the inner cylinder portion 1 and the outer cylinder portion 2. It can also be formed in an oblique direction with respect to the axial direction. By doing so, the inner cylinder portion 1 can be moved straight in the axial direction along with the rotation.

  FIG. 11 is a development view illustrating another example of the guide hole in the guide mechanism according to the third embodiment. As shown in FIG. 11, a guide hole is formed in an oblique direction with respect to the axial direction X of the inner cylinder part 1 and the outer cylinder part 2, and the inner cylinder part 1 is rotated by curving the slider accordingly. At the same time, it can be moved straight in the axial direction.

  Furthermore, the guide mechanism shown in the first to third embodiments can be applied to a lens barrel such as a zoom lens of a photographic camera. In that case, a lens is disposed in the hollow portion of the inner cylinder portion 1. In that case, the guide mechanism is used in an aperture adjustment ring mechanism, a zoom adjustment mechanism, and the like.

  Further, in the first to third embodiments, the sliders 3, 103, and 203 have a substantially H shape, but the two extending from the fixing portions 31, 131, and 231 in opposite directions are provided. You may delete about one site | part which does not have convex part 32a, 132a, 232a among site | parts.

  The present invention is applicable to optical products such as a lens barrel.

DESCRIPTION OF SYMBOLS 1 Inner cylinder part 2 Outer cylinder part 3 Slider 21,221 Guide hole 21a, 221a Wall surface (an example of one wall surface)
21b, 221b Wall surface (an example of the other wall surface)
22 recess (an example of a first recess)
31 fixed part 32,132,232 cantilever (example of first cantilever)
32a, 132a, 232a Convex part (example of first convex part)
33, 133, 233 Contact portion 134 Cantilever (an example of a second cantilever)
134a convex portion (an example of a second convex portion)
234 Cantilever (an example of a third cantilever)
234a convex portion (an example of a third convex portion)

Claims (5)

An inner cylinder,
An outer cylinder,
A guide hole formed in the outer cylinder portion;
A slider that is inserted through the guide hole and fixed to the inner cylinder portion at the fixing portion;
A first cantilever beam extending from the fixed portion of the slider;
A first protrusion formed on the first cantilever and contacting one wall surface of the guide hole;
A contact portion extending from the fixed portion and contacting the other wall surface facing the one wall surface of the guide hole;
Equipped with a,
The abutting portion forms an abutting surface in surface contact with the other wall surface at an extending portion extending from the fixed portion of the slider,
The height of the slider from the first cantilever beam to the contact surface is equal to the height of the fixed portion;
Guide mechanism characterized by.   The first concave portion formed at a position where the first convex portion is to be locked by a click stop mechanism on the one wall surface with which the first convex portion abuts. Guide mechanism. A second cantilever beam extending from the fixed portion of the slider in a direction opposite to the first cantilever beam;
A second protrusion formed on the second cantilever and abutting against the one wall surface of the guide hole;
A second concave portion formed at a position where the second convex portion should be locked by a click stop mechanism on the one wall surface with which the second convex portion abuts;
Further comprising
The first and second recesses are respectively formed at both ends of the guide hole;
The guide mechanism according to claim 2.   The guide mechanism according to claim 2, wherein the first recess is formed in an intermediate portion of the guide hole.   The contact portion includes a third cantilever extending from the fixed portion of the slider, and a third cantilever formed on the third cantilever and contacting the other wall surface of the guide hole. And a third concave portion formed at a position where the third convex portion should be locked by a click stop mechanism on the other wall surface with which the third convex portion abuts. The guide mechanism according to any one of claims 2 to 4.

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