JP4615407B2 - Lens tube holding jig - Google Patents

Description

    The present invention relates to a lens barrel holding jig, and more particularly to a lens barrel holding jig that can hold a lens barrel satisfactorily by preventing horizontal and vertical movement of the lens barrel.

Conventionally, as a lens barrel holding jig for holding a lens barrel, for example, the lower part of the outer periphery of the lens barrel is linearly sandwiched and supported by the tips of a pair of opposing support members.
Such a lens barrel holding jig is effective for moving the lens barrel in the clamping direction.

    However, there is a problem that it is insufficient for preventing the movement of the lens barrel in the horizontal direction, the vertical direction, etc. other than the direction in which the lens barrel is sandwiched.

  It is an object of the present invention to provide a lens barrel holding jig that eliminates the above-mentioned problems.

    The lens barrel holding jig of the present invention is a lens barrel holding jig for holding a lens barrel, and the lens barrel has N (N ≧ 3) protrusions on a cylindrical outer periphery. The projections are spaced apart from each other at an angle of 360 ° / N on the outer periphery, and a base on which the end of the lens barrel is placed, and two bases provided on the base and engaged with the projections. The locking portion and the two locking portions are arranged on the base so as to be locked at an angle of 360 ° / N so as to be locked to the protrusion, and the two locking portions are locked to the protrusion. Each of the locking portions is a lower surface, which is an inclined surface that is inclined upward toward the outside.

    Further, the lens barrel holding jig according to claim 2 is the lens barrel holding jig according to claim 1, wherein at least one of the two locking portions is detachably fixed. It is attached to the base by means.

    The lens barrel holding jig according to claim 3 is the lens barrel holding jig according to claim 1, wherein at least one of the two locking portions has a long hole. In addition, the front end has a male screw that is screwed into a female screw provided on the base, and is provided with a bolt that is tightened through the elongated hole and attached to the base.

    According to the lens barrel holding jig according to claim 1, the portions of the two engaging portions that are engaged with the projections of the lens barrel are the lower surfaces and are inclined upwardly toward the outside. Since it is a surface, it is possible to hold the lens barrel while preventing horizontal movement and vertical movement.

An embodiment of the lens barrel holding jig of the present invention will be described with reference to the drawings.
1 to 8, reference numeral 1 denotes a lens barrel holding jig for holding the lens barrel 2. The lens barrel holding jig 1 includes, for example, a lens 3 in the lens barrel 2 in a state where the lens barrel 2 is held. Used when incorporating.
The lens barrel 2 has N (N ≧ 3) protrusions 21 on the outer periphery of the cylindrical shape, and the one in this embodiment has, for example, four as shown in FIG. The protrusions 21 are arranged on the outer periphery of the cylindrical shape so as to be spaced apart from each other by an angle of 360 ° / N from the center of the lens barrel 2. For example, in the present embodiment, the projection 21 is 90 ° from the center of the lens barrel 2. They are spaced equiangularly.
Note that N is the number of protrusions 21 provided on the outer periphery of the cylindrical shape, and the number of protrusions 21 of the lens barrel 2 that is the target of the lens barrel holding jig 1 of the present invention is three or more. The protrusions 21 are arranged at equal angles on the outer periphery of the cylindrical shape, that is, at an angle of 120 ° when there are three protrusions 21 and at an angle of 90 ° when there are four protrusions 21. To do.

Reference numeral 11 denotes a base on which the end of the lens barrel 2 is placed, and the base 11 forms a flat surface. The base 11 is provided with two locking portions 12 and 12 that are locked to the protrusions 21 and 21.
The two locking portions 12 and 12 have an angle of 360 ° / N from the center of the lens barrel 2 locked on the protrusions 21 and 21 on the base 11 so as to be locked to the protrusions 21 and 21. For example, the device of this embodiment is disposed on the base 11 at an equal angle of 90 ° from the center of the lens barrel 2 that is locked to the protrusions 21 and 21.

As shown in FIGS. 5 and 7, the portions of the two engaging portions 12, 12 that are engaged with the protrusions 21, 21 are lower surfaces, and inclined surfaces 12 a that are upwardly inclined outward. 12a.
The locking portion 12 is attached to the base 11 by a detachable fixing means. The detachable fixing means includes, for example, a bolt 16 that is attached to the base 11 via a long hole 12b provided in the locking portion 12. As shown in FIG. 8, the bolt 16 has a male screw 16a that is screwed into a female screw 11a provided on the base 11 at the tip, and is fastened to the base 11 via a long hole 12b.
As shown in FIG. 8, the attachment portion 14 is attached to the base 11 with a male screw 13 that is screwed into a female screw 11 b provided on the base 11. The attachment portion 14 has a function as a guide for the locking portion 12. In other words, the locking portion 12 can move using the mounting portion 14 as a guide (ruler). The locking portions 12 and 12 are configured as described above, and both are configured via the long hole 15. However, in the present invention, any one of the locking portions 12, 12 may be configured to be movable.

Therefore, in order to hold the lens barrel 2 using the lens barrel holding jig 1, the lens barrel 2 shown by the solid line in FIG. 3 is moved to the position of the broken line, and the inclined surface 12a of the one locking portion 12 is moved. The protrusion 21 is locked (see FIGS. 4 and 5). Next, the remaining other locking portion 12 is moved in the direction of the arrow shown in FIG. 2 so that the protrusion 21 is locked to the inclined surface 12a of the remaining other locking portion 12 and the state is maintained. In addition, in a state where the male screw 16a is screwed to the female screw 11a provided on the base 11, the bolt 16 is rotated and tightened through the long hole 12b to fix the locking portion 12 to the mounting portion 14 ( 6 to 8).
After fixing, an operation such as incorporating the lens 3 into the lens barrel 2 is performed. When the operation is completed, the bolt 16 is loosened, and the locking portion 12 is moved in the direction opposite to the arrow direction shown in FIG.

    As a result, according to the lens barrel holding jig 1 of the present embodiment, the portions of the two locking portions 12 and 12 that are locked to the protrusions 21 of the lens barrel 2 are the lower surface and the outer side. Since the inclined surfaces 12a and 12a are inclined upward (see FIGS. 5 and 7), the horizontal movement and the vertical movement of the lens barrel 2 are prevented, and the lens barrel 2 is held well. be able to.

    Note that the detachable fixing means is not limited to the bolt 16 attached to the base 11 via the long hole 12b provided in the locking portion 12 described above, but is not illustrated, for example, the base 11 is made of a ferromagnetic material such as iron. The locking portion 12 may be formed of a magnet and used as a fixing means by magnetic force, and guides are provided on both sides of the locking portion 12 to move. While allowing the movement to the projection 21 side and restricting the movement of the locking portion 12 in the vertical direction, the locking portion 12 is biased toward the projection 21 of the lens barrel 2 by an elastic member (for example, a spring). Thus, the locking portion 12 may be fixed to the base 11.

FIG. 1 is a schematic perspective view of a lens barrel held by a lens barrel holding jig according to an embodiment of the present invention. FIG. 2 is a schematic perspective view of a lens barrel holding jig that holds the lens barrel of FIG. 1. FIG. 3 is a schematic plan view of the state before and after holding the lens barrel of FIG. FIG. 4 is a schematic plan view showing a state before the lens barrel of FIG. 3 is locked to one locking portion and locked to the other locking portion. FIG. 5 is a schematic view seen from the direction of arrow A in FIG. FIG. 6 is a schematic plan view showing a state in which the lens barrel of FIG. 4 is locked to the other locking portion. FIG. 7 is a schematic view seen from the direction of arrow B in FIG. It is a schematic side view. 8 is a schematic cross-sectional view taken along the line CC of FIG.

Explanation of symbols

1 Lens-holding jig 2 Lens-barrel
11 base
12 Locking part
12a Inclined surface
21 Protrusion

Claims (3)

A lens barrel holding jig for holding a lens barrel,
The lens barrel has N (N ≧ 3) protrusions on the outer periphery of the cylindrical shape,
The protrusions are spaced apart at an angle of 360 ° / N on the outer periphery,
A base for mounting the end of the lens barrel;
Two locking portions provided on the base and locked to the protrusion;
The two locking portions are spaced apart from each other at an angle of 360 ° / N on the base so as to be locked to the protrusion.
Each of the two engaging portions that are engaged with the protrusions is a lower surface, and is an inclined surface that is upwardly inclined outward. 2. The lens barrel holding jig according to claim 1, wherein at least one of the two locking portions is attached to the base by a detachable fixing means. Of the two locking portions, at least one locking portion has a long hole,
The lens barrel holding device according to claim 1, further comprising: a male screw threadedly engaged with a female screw provided on a base at a distal end portion, and a bolt attached to the base by being tightened through the elongated hole. jig.

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