JPH0745050Y2 - Element mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an element mounting structure in which an element is attachable to and detachable from an apparatus, and more particularly to an element mounting structure capable of positioning with high accuracy in a rotational direction.

[Prior Art] A conventional element mounting structure is shown in FIG.

The figure shows an example in which a photodetector 21 is applied as a device and an attenuator 22 is applied as an element.

A light receiving element 23 is attached to the photodetector 21, and a screw portion 21a is formed on the front surface of the light receiving element 23.

A damping plate 24 is attached to the attenuator 22 and a screw portion 22a is formed.

Therefore, the attenuator 22 can be attached to the photodetector 21 by screwing the screw part 22a of the attenuator 22 into the screw part 21a of the photodetector 21, and in this case, the light to the light receiving element 23 can be restricted. it can.

[Problems to be Solved by the Invention] However, according to the above-described conventional structure, since the attenuator 22 is screwed while rotating, the mounting position of the attenuator 22 is determined by the depth of thread cutting. However, there is an inconvenience that the attachment position cannot be fixed, and the attachment and detachment are not easy.

In particular, since the attenuating plate 24 needs to be precisely positioned with respect to the polarization of light, it must be precisely positioned in the rotation direction, but this cannot be done, which causes a problem that light detection cannot be accurately measured.

In addition to the above description, there is a similar problem in the case of precisely mounting the element in the rotation direction with respect to the device, for example, an optical connector.

The present invention has been made in order to solve the above-mentioned problems, and provides an element mounting structure capable of accurately positioning an element in a rotational direction with respect to a device and easily removable. Is intended.

[Means for Solving the Problems] In order to achieve the above object, the element mounting structure of the present invention has a hollow projecting portion 2 provided in a connector 1 and having a predetermined outer diameter; and a projecting direction of the projecting portion 2. Projections 3a, 3b provided at least at two or more locations on the side piece of the same; and for engaging the projections 3a, 3b of the projections provided on the flange 4 and pulling the connector 1 toward the flange 4 for engagement. Collars 5a, 5b having central portions curved inward; arcuate notches 5aa, 5b formed in the collars 5a, 5b in an arc shape and having a predetermined inner diameter to be fitted into the cylindrical protrusion 2.
a; and a positioning mechanism 1b, 1c, 4a for positioning the connector 1 and the flange 4 in the rotational direction during rotational fitting.

[Operation] To explain the operation of the above-described configuration, first, as shown in FIG. 3 (a), the flange 4 is rotated 90 degrees, and the flanges 5a and 5b are removed from the projections 3a and 3b. To insert. Next, when the flange 4 is further rotated 90 degrees, first, the hypotenuses 5ab and 5bb of the brims 5a and 5b enter under the protrusions 3a and 3b,
Then, the collars 5a, 5b gradually enter the protrusions 3a, 3b. At this time, the elastic collars 5a, 5b are pushed downward by the protrusions 3a, 3b. Finally, the flange 4 is the connector 1
When they are overlapped with each other, the recess 4a of the flange 4 engages with the stepped portions 1b and 1c of the connector 1 so that the flange 4 can be automatically fixed to the connector 1 in a fixed state.

[Example] Hereinafter, an element mounting structure of the present invention will be described.

FIG. 1 is a perspective view showing an embodiment of an element mounting structure.

As shown in the figure, in the connector 1, a flat mounting portion 1a is fixed to a device (not shown), and protrusions 3a and 3b are attached at symmetrical positions on the sides of the hollow circular protrusion 2. .

The protrusions 3a and 3b are provided at a predetermined height above the mounting portion 1a. In addition, stepped portions 1b and 1c are provided on the upper surface of the mounting portion 1a.

Further, the flange 4 is formed of a material having an elastic force and has the same diameter as the mounting portion 1c of the connector 1. Inside the flange 4, a concave portion 4a is formed on the entire circumference corresponding to the step portions 1b and 1c. Further, the flange 4 is provided with flanges 5a and 5b at portions corresponding to the protrusions 3a and 3b of the connector 1. The flanges 5a, 5b are formed with notches 5aa, 5ba having the same diameter as or a slightly larger diameter than the protruding portion 2 of the connector 1, and the notches 5a, 5ba are formed.
The hypotenuses 5ab and 5bb are formed on aa and 5ba, respectively. Further, as shown in the side sectional view of FIG. 2, the collars 5a and 5b have a shape in which the central portion is curved upward in an arc shape. The height H between the bottom of the flange 4 and the tops of the collars 5a and 5b is H.
Is larger than the height h between the upper surface of the mounting portion 1a of the connector 1 and the protrusions 3a and 3b.

Further, a projecting piece 4a having a smaller diameter is formed on the upper portion of the flange 4, and a holder (not shown) to which an element is attached can be attached to the projecting piece 4a in advance.

Further, the element may be directly attached to the flange 4 without using the holder.

Next, the operation of the above configuration will be described with reference to the operation diagram of FIG.

The device is provided with a light receiving element in consideration of the position of the connector 1.

First, as shown in FIG. 3 (a), the flange 4 is rotated by 90 degrees, and the flanges 5a, 5b are inserted into the connector 1 in a state of being separated from the protrusions 3a, 3b.

Next, when the flange 4 is further rotated 90 degrees, the collar 5
The hypotenuses 5ab and 5bb of a and 5b enter under the protrusions 3a and 3b, and the brims 5a and 5b gradually enter into the protrusions 3a and 3b. At this time, due to the above-described relationship between the brim and the height of the protrusion, the elastic brim 5a, 5b is pushed downward by the protrusion 3a, 3b. When the flange 4 finally overlaps the connector 1 as shown in FIG. 3 (b), the recess 4a of the flange 4 is formed.
Engages with the stepped portions 1b and 1c of the connector 1, and the flange 4 can be fixed in a state where it is automatically positioned in the connector 1.

In this way, the final fixing state of the flange 4 and the connector 1 can be known, and accordingly, if an attenuation plate and a photodetector are respectively provided, they can be positioned with high accuracy in both the rotation direction and the axial direction. can do.

Further, in the above-mentioned embodiment, the structure in which the damping plate is attached to the flange 4 is adopted, but the structure may be such that an optical plug or a light shielding plate is provided outside.

[Advantage of the Invention] According to the element mounting structure of the present invention, the notch of the flange is fitted to the protruding portion of the connector, and the direction perpendicular to the axis between them can be fitted without rattling.

Further, the connector and the flange are brought into close contact with each other by the brim which is curved in the central portion, and the positioning in the axial direction can be performed with high accuracy, and the flange can be fitted to the connector from any rotation direction.

Further, the recessed portion of the flange engages with the stepped portion of the connector, and the positioning in the rotational direction between them can be performed with high accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an element mounting structure according to the present invention, FIG. 2 is a side sectional view of the structure, and FIGS. 3 (a) and 3 (b) are
FIG. 4 is an operation diagram of the same structure, and FIG. 4 is a view showing a conventional element mounting structure. 1 ... Connector, 1b, 1c ... Projection, 3a, 3b ... Projection, 4a
...... Recesses, 5a, 5b ...... Hems.

Claims (1)

[Scope of utility model registration request] 1. A hollow projecting portion (2) provided in a connector (1) having a predetermined outer diameter; and projections (3a, 3b) provided at least at two or more locations on a side piece in the projecting direction of the projecting portion. Collars (5a, 5b) provided on a flange (4) for engaging the protrusions of the protrusions and for pulling and engaging the connector toward the flange, and having a curved central portion (5a, 5b); An arcuate notch (5aa, 5ba) having a predetermined inner diameter to be fitted to the protrusion, and a positioning mechanism (1b, 1c, for positioning the connector and the flange in the rotational direction during rotational fitting). 4a) and; are provided for the element mounting structure.