JP2509095B2 - Rotating irradiation unit - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel rotary irradiation unit. More specifically, the present invention facilitates the support of a rotating plate supporting a reflecting mirror and a light bulb, and ensures the support.

[0002]

2. Description of the Related Art FIG. 6 shows an example of a conventional rotary irradiation unit a.
Indicates.

[0003] Reference numeral b denotes a base, on which a mounting hole c is formed.

A rotary plate d has a boss e projecting downward from the center thereof, and the boss e has a supported hole f formed therethrough. A concave portion g is formed in the center of the upper surface of the rotating plate d so as to surround the supported hole f. Further, the concave portion g is formed in the concave portion g in an annular shape close to the opening edge of the supported hole f. A ridge h is formed, the amount of extension of which is smaller than the depth of the recess g.

Reference numeral i denotes a socket, and a mounting hole j is formed in the center of the bottom surface.

Reference numeral k denotes a pipe-shaped metallic shaft.

Thus, the lower end of the shaft k is connected to the base b
, The shaft k is inserted into the supported hole f of the rotating plate d, and the upper end of the shaft k is inserted through the mounted hole j of the socket i. The portion protruding below the base b and the portion protruding upward from the bottom of the socket i are both swaged together, thereby rotatably supporting the rotating plate d on the base b.

The rotating plate d supports a not-shown reflecting mirror, and the socket i supports an unillustrated light bulb in a detachable manner.

[0009]

However, in the above-described conventional rotary irradiation unit, since the upper and lower ends of the shaft k are crimped together and the rotary plate d and the socket i are simultaneously mounted, the upper and lower crimping points are required. If the caulking is not constant and the caulking is too strong, there is a risk that the member, especially the center part of the rotating plate d, may be damaged. Despite the difficulty in managing the caulking force in the caulking process, there is a problem that the incidence of defects is high.

[0010]

In order to solve the above-mentioned problems, a rotary irradiation unit according to the present invention comprises: a cylindrical collar having a flange erected from a base and having a lower end;
A cylindrical shaft that supports the lower end of a socket that detachably supports a light bulb, and a rotating plate that has a cylindrical supported portion at its center and a reflecting mirror is supported on its upper surface. Part is rotatably fitted on the collar, the upper end of the collar is press-fitted to the shaft, and the supported part of the rotary plate is sandwiched between the flange of the collar and the lower end of the shaft. It is a thing.

[0011]

According to the rotary irradiation unit of the present invention,
As long as the dimensional accuracy of the shaft, collar, and supported part of the rotating plate is accurate, the distance between the flange of the collar and the lower end of the shaft will always be constant, so the rotating plate is free from rattling and tight. Not too much, it is rotatably supported by the collar in its best condition.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a rotary irradiation unit according to the present invention.

In FIG. 1, reference numeral 1 denotes a rotary irradiation unit, which is usually arranged in a colorless transparent or colored transparent globe (not shown) for use.

Reference numeral 2 denotes a metallic chassis, which is fixed in the glove. A mounting hole 3 is formed substantially at the center of the chassis 2.

Reference numeral 4 denotes a cylindrical collar, which is made of metal such as stainless steel. A flange 5 protrudes slightly above the lower end of the collar 4. Further, a groove 6 extending annularly over the entire circumference is formed on the outer peripheral surface above the flange 5.

A portion of the collar 4 below the flange 5 is inserted into the mounting hole 3 of the chassis 2 from above,
A portion 4a protruding downward from the chassis 2 is swaged and fixed to the chassis 2.

A rotating plate 7 is made of a suitable synthetic resin.

A large recess 8 is formed in the center of the rotary plate 7, and a cylindrical supported portion 9 is integrally formed in the center of the recess 8.

The rotating plate 7 is rotatably supported by inserting the collar 4 into the supported portion 9 thereof.
In addition, before that, the sliding washer 10 is fitted on the collar 4,
The lower end of the supported portion 9 is seated on the flange 5 of the collar 4 via the washer 10. Further, the groove 6 of the collar 4 faces the substantially center of the inner peripheral surface of the supported portion 9 in the vertical direction, and the groove 6 is filled with grease (not shown).

Reference numeral 11 denotes a substantially cylindrical shaft having a stopper edge 12 projecting inward from its upper end, and a caulking piece 13 projecting upward from the inner peripheral edge of the stopper edge 12 is formed. , These are integrally formed of metal, for example, stainless steel.

Reference numeral 14 is a socket, and 15 is its barrel. An attachment hole 16 is formed in the bottom wall of the barrel 15. Reference numeral 17 is an insulator that is slidably arranged in the cylinder 15 in the vertical direction, and 18 is an insulator 17
Contact supported in the center of the, 19 is contact 1
It is a cord connected to 8.

The caulking piece 13 of the shaft 11 is inserted into the mounting hole 16 of the socket cylinder 15 from below, and the portion of the caulking piece 13 projecting into the cylinder 15 is caulked to form the upper end of the shaft 11. The socket 14 is fixed to.

The shaft 11 is fitted onto the collar 4 from above. The outer diameter of the collar 4 and the inner diameter of the shaft 11 are set so that both are press-fitted. Therefore, by fitting the shaft 11 onto the collar 4, the shaft 11 is fixed to the upper end of the collar 4. . Also,
The shaft 11 is externally fitted until its stopper edge 12 abuts on the upper end of the collar 4.

Reference numeral 20 denotes a washer having a good slipperiness, which is inserted between the upper end of the supported portion 9 of the rotary plate 7 and the lower end of the shaft 11.

In this way, the rotary plate 7 is rotatably supported by the collar 4 between the flange 5 and the lower end of the shaft 11. The collar 4, in particular, the dimension from the upper surface of the flange 5 to the upper end of the collar 4, the dimension from the lower surface of the stopper edge 12 of the shaft 11 to the lower end of the shaft 11, and even the length dimension of the supported portion 9 of the rotary plate 7. If accurately formed, the rotary plate 7 is rotatably supported by the collar 4 in an optimal state in which it is not tight and does not come loose.

Reference numeral 21 denotes a motor, which is fixed to the upper surface of the chassis 2 with its rotating shaft 21a projecting upward. A cylindrical transmission roller 22 is fixed to the rotary shaft 21a of the motor 21, and a knurl extending in the axial direction is formed on the outer peripheral surface of the transmission roller 22.

Reference numeral 23 denotes a friction belt fixed to the outer peripheral surface of the rotary plate 7 made of rubber or the like.
The transmission roller 22 is pressed against. Therefore, when the motor 21 rotates, the rotation is transmitted to the rotary plate 7 via the transmission roller 22 and the friction belt 23, and the rotary plate 7 rotates.

Reference numeral 24 denotes a reflecting mirror, which has a shape in which two rotating paraboloidal reflectors 25, 25 are connected back to back so that their respective focal points are common, and the connection is made. An insertion hole 26 is formed in the lower surface of the portion.

Both end portions of the bottom surface of the reflecting mirror 24 in the optical axis direction are flat portions 27, 27.
Positioning projections 28, 28 are provided so as to project from the tips of 7, 27 to the inside of the baffle. Further, from the position closer to the inside than the positioning protrusions 28, 28, the engaging pieces 29, 2
9 is provided so as to project downward, and the engaging pieces 29, 29
Engaging claws 29a, 29a are provided on the inner surface of the lower end of the projecting portion.

Numerals 30 and 30 are engagement holes formed in the rotating plate 7 between the recess 8 and the outer peripheral edge thereof in a position close to the recess 8. Further, recesses 31 and 31 which are long in the radial direction are formed on the upper surface of the portion between the engagement holes 30 and 30 and the outer peripheral edge, and the positioning hole 32 is located at a position near the outer peripheral edge of the recesses 31 and 31. , 32 are formed.

Therefore, the plane portion 27 of the reflecting mirror 24,
27 is positioned in the recesses 31, 31 of the rotary plate 7, and the positioning protrusions 28, 28 are engaged with the positioning holes 32, 32. Further, if the lower ends of the engaging pieces 29, 29 of the reflecting mirror 24 are applied to the engaging holes 30, 30 of the rotary plate 7 and the reflecting mirror 24 is pressed downward in this state, the engaging pieces 29, 29 will be released. The engaging claws 29a and 29a are bent outward while the engaging claws 29a and 29a are engaged.
0, and the engaging pieces 29a, 29a engage with the engaging holes 30, 30 on the lower surface. Then, at this time, both ends of the lower end of the reflecting mirror 24 abut on the outer inner surfaces of the recesses 31, 31 of the rotary plate 7, and the positioning projections 28, 28 are positioned by the positioning holes 3.
The positioning projections 28, 2 are brought into contact with the outer inner surfaces of the second and the second 32.
8 and the inner surfaces of the positioning holes 32, 32 have a space 3
3, 33 are formed.

As described above, the reflecting mirror 24 is attached to the rotating plate 7
Is attached to the upper surface of the reflecting mirror 24, and the socket 14 is positioned in the insertion hole 26 of the reflecting mirror 24. Reference numeral 34 denotes a light bulb detachably attached to the socket 14, and its filament (not shown) is located at a common focal point for the reflectors 25, 25.

[0033]

As is apparent from the above description, the rotary irradiation unit according to the present invention comprises a reflecting mirror rotatable with respect to the base and a bulb fixed to the base and positioned in the reflecting mirror. A rotating irradiation unit with a cylindrical collar having a flange at the lower end erected from the base,
A cylindrical shaft that supports the lower end of a socket that detachably supports a light bulb, and a rotating plate that has a cylindrical supported portion at its center and a reflecting mirror on its upper surface Part is rotatably fitted on the collar, the upper end of the collar is press-fitted to the shaft, and the supported part of the rotary plate is sandwiched between the flange of the collar and the lower end of the shaft. It is characterized by

Therefore, in the rotary irradiation unit of the present invention, the distance between the flange of the collar and the lower end of the shaft is always constant as long as the dimensional accuracy of the shaft, the collar, and the supported portion of the rotary plate is accurate. Since it is constant, the rotating plate is rotatably supported by the collar in the best condition without looseness and without being too tight.

The specific shapes and structures shown in the above embodiments are merely examples for embodying the present invention, and the technical scope of the present invention is limitedly interpreted by these. It is not something that will be done.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a rotary irradiation unit according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view partially cut away.

FIG. 4 is a schematic perspective view.

5 is an enlarged view of a V portion of FIG. 1. FIG.

FIG. 6 is a cross-sectional view of a main part showing an example of a conventional rotary irradiation unit.

[Explanation of symbols]

 1 Rotation Irradiation Unit 2 Base 4 Color 5 Flange 7 Rotating Plate 9 Supported Part 11 Shaft 14 Socket 24 Reflector 34 Light Bulb

Claims (1)

(57) [Claims] 1. A rotary irradiation unit comprising a reflecting mirror rotatable with respect to a base and a light bulb fixed to the base and positioned in the reflecting mirror, wherein the rotating irradiation unit is erected from the base and has a flange at a lower end. A cylindrical collar having, a cylindrical shaft that supports a lower end of a socket that detachably supports a light bulb, and a rotating plate that has a cylindrical supported portion at its center and supports a reflecting mirror on its upper surface. The rotatably supported portion of the rotary plate is rotatably fitted to the collar, the upper end of the collar is press-fitted to the shaft, and the supported portion of the rotary plate is connected to the flange of the collar and the lower end of the shaft. A rotary irradiation unit characterized in that it is supported in a sandwiched manner.