JPH0334161B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is used for direct attachment to walls and ceilings for interior decoration of shop windows and other stores, and is mainly used to connect walls and ceilings. to the corner part,
This invention relates to a spot lighting fixture for a store, which is designed to provide a variety of interesting and varied production effects by projecting a colored light ray pattern woven by so-called light and shadow.

<Conventional technology and its problems> This type of spot lighting equipment for stores has a cylindrical fixture body with a roughly U-shaped cross section that is directly attached to the indoor wall or ceiling surface; a reflector holder fixedly integrated into the bottom wall of the device main body as a small diameter cylindrical shape with an approximately U-shaped cross section with an open direction; a lamp socket fixedly installed on the bottom wall of the holder; A light source lamp installed along the cylindrical core line of the instrument body;
In order to reflect the light emitted from the lamp, a substantially conical saucer-shaped reflector is installed in the holder so as to surround the lamp; There is a known model that includes a convex lens that faces the aperture of the device body so as to close the aperture of the device body while facing a reflecting plate at a constant distance in order to enlarge the projection onto a wall or ceiling. In order to give a colored color to the light emitted from a light source lamp, it has conventionally been customary to insert a filter, which has been previously given a certain color, between a reflecting plate and a convex lens, which face each other.

However, this not only requires a separate color filter in addition to the reflector, but also the projection of light onto the interior walls and ceiling is similar to what is called a solid printing of a single color. It becomes monotonous, and due to the interior decoration due to the lighting,
It is still not possible to provide a temporary and elegant production effect that is rich in interesting changes.

<Means for Solving the Problems> The present invention is intended to improve these problems, and for this purpose, a cylinder with a substantially U-shaped cross section that is directly attached to the interior wall or ceiling of a store is used. A reflector holder having a small diameter cylindrical shape with an approximately U-shaped cross section and opening in the same direction as the instrument body is fixed and integrated with the bottom wall of the instrument body, and a bottom wall of the holder. A lamp socket fixedly installed in the lamp socket, a halogen lamp planted from the socket along the cylindrical core line of the main body of the appliance, and a halogen lamp installed in the holder so as to surround the lamp in order to reflect the light emitted from the lamp. A conical saucer-shaped reflector is used, and the reflector faces the reflector at a constant distance in order to enlarge and project the reflected light from the arc-shaped inner wall of the reflector onto the indoor wall or ceiling. In addition, in a spot lighting device for a store, which is equipped with a convex lens that faces the opening surface of the device body so as to close the opening surface of the device body, the reflecting plate is removably fitted to the edge of the opening of the holder, and the reflecting plate A scale pattern, a floral pattern, a geometric pattern, or other constant uneven pattern is formed on the light-reflecting surface, and a colored film of a constant color is applied to the entire surface of the uneven pattern, so that the uneven state does not disappear. By attaching and integrating the convex lens to the light reflecting surface of the reflector plate, it is determined that the light reflected from the light reflecting surface of the reflector plate is given a bright and dark pattern by the concave-convex pattern and a colored color by the colored film. A pair of annular lens retainer cover and lens receiver cover, which are smaller in diameter than the aperture, are clamped and fixed in advance as a separate and independent lens unit from the main body of the instrument.
In addition, a plurality of key holes in which a large-diameter circular hole and a small-diameter elongated hole communicate with each other are formed in the peripheral edges of both covers in a radially symmetrical distribution pattern as a whole, while Multiple spring holders from the trunk wall,
It integrally projects inward as an overall radially symmetrical distribution type corresponding to the key hole of the lens unit,
The shaft of an adjustment screw with a large diameter head and a small diameter shaft is screwed into each spring holder so that it can move forward and backward in a direction parallel to the cylindrical core line of the main body of the instrument. The whole supports an annular lens cover receiving plate that receives the lens unit, and a compression coil spring is interposed between the lens cover receiving plate and the spring holder, which face each other.
By winding it around the shaft of each adjustment screw, the lens cover receiving plate is constantly biased in an elastic state in the direction of pushing it out from the instrument body, and the lens is pushed toward the head of the adjustment screw while resisting the elastic force. By releasably locking the key hole of the unit, the lens unit is assembled and held in the instrument body, and the adjustment screw is moved forward and backward from the opening surface of the instrument body while the lens unit is held in this state.
The present invention is characterized in that the focal length of the convex lens is adjustable.

<Example> Hereinafter, the specific structure of the present invention will be described in detail based on the illustrated example. In FIGS. The main body of the device is U-shaped, and a large number of small heat radiation holes 11 are centrally opened in the center of the bottom wall. 12 is also the instrument body A
This is a locking claw piece welded to a height near the lower part of the body wall, and its free tip has a substantially dogleg shape with its free tip bent slightly outward and downward.

Reference numeral B denotes a casing frame for mounting the instrument body A, which is a separate body from the instrument body A in advance, and has so-called Daruma holes 13 formed as a pair of upper and lower openings in its back wall.
It is first directly attached and fixed to the indoor wall surface W of the store via the oval hole 14. 15 is a power supply hole opened in the center of the back wall of the housing frame B, 16 is a synthetic resin terminal block fixed to one side wall, and 17 is a receiving tongue welded to the center of the bottom wall. A piece of approximately L shape with its free tip bent upwards.
The locking claw piece 1 of the device main body A is
Corresponds to 2.

From the back wall of the housing frame B, a plurality of stud bolts 18 (in the example shown, a pair of left and right stud bolts in total) are also protruded horizontally, so these bolts 18
Then, close the housing frame B from the front side, and then open the appliance body A.
Fit the body wall of the bolt 18 into the cap nut 19.
By screwing them together, the instrument body A is later attached and fixed to the housing frame B.

At that time, the locking claw piece 12 of the device body A elastically locks with the receiving tongue piece 17 of the housing frame B, and therefore, even though it is exposed to vibrations and shocks during use, the device body A It will be held stably at all times without fear of wobbling or falling. In addition, 20 is a rubber washer interposed between the body wall of the main body A of the instrument and the cap nut 19, and 21 is also a communication hole opened at a mid-height position of the body wall so as to correspond to the power supply hole 15. It is.

A leg seat 22 is integrally welded to the bottom wall of the instrument main body A, and has a generally hat-shaped cross section. C is a reflector holder that is also built into the device body A.
It has a small-diameter cylindrical shape with a substantially U-shaped cross section and an open upper part, and is joined to the leg seat 22 at its bottom wall, and is fixed and integrated with the leg seat 22 by a plurality of machine screws 23. 24 to the center of the bottom wall of holder C,
This is a ceramic lamp socket fixedly installed with a plurality of rivets 25, and a halogen lamp 26 serving as a light source is screwed into the lamp socket from above in an upright position and detachably. It is screwed on. It goes without saying that the lamp 26 is located on the cylindrical core line of the instrument body A.

Further, D is a reflecting plate plastically deformed from an aluminum material into a generally conical saucer shape, and has a flange portion 2 slightly projecting outward from the upper edge of the opening.
7 is fitted into the upper edge of the opening of the holder C from above, and a rubber retaining ring 28 is also fitted from above, thereby being fixedly held in the holder C. . In other words, the reflector D
is installed in the holder C so as to surround the lamp 26 in an upwardly expanded state. Reference numeral 29 denotes an annular regulating stopper bent inward from a position near the upper edge of the opening of the holder C, which holds the reflector D so that it cannot fall, and at the same time prevents the retaining ring 28 from slipping out. It is locked in. However, by manually forcibly removing the retaining ring 28, the reflector D and the lamp 26 can be replaced. 30 is a lamp escape hole opened in the center of the reflecting plate D; 31
is a communication hole opened in the body wall of holder C,
Therefore, the wiring cord (not shown) from the power supply can be smoothly connected from the power supply hole 15 of the housing frame B to the lamp socket 24 through the communication holes 21 and 31 of the appliance body A and the holder C.

In particular, the arc-shaped inner wall surface (light reflecting surface) of the reflector D is provided with an uneven pattern 32 integrally with the molding by a plastic processing mold (not shown), and the pattern surface In addition, a colored coating 33
When the reflected light from the lamp 26 is projected onto the wall surface W or the ceiling surface R, a so-called duet of light and shadow due to the ups and downs of the uneven pattern 32 and a desired color are simultaneously formed. It is becoming possible to give.

That is, as suggested from FIG. 10, which is a partially enlarged sectional view of the reflector D, the aluminum substrate x, which is the raw material of the reflector D, is first drawn into the conical saucer shape using a mold. Then all at once,
A certain uneven pattern 32 is formed on the inner wall surface (one side surface of the material fabric). As long as the surface is even slightly undulating, the pattern 32 may include, for example, an overall scale pattern or floral pattern in plan view as shown in Fig. 11, a geometric pattern as shown in Fig. 12, and various other pattern patterns. can be freely selected.

After forming the uneven pattern 32, a synthetic resin base coat layer y is added onto the substrate x, and then a surface treatment method such as vacuum evaporation or ion plating (ionized electrostatic plating) is used to coat the base coat layer. A so-called plating layer z is formed by solidifying the aluminum material on the plating layer y, and finally a synthetic resin coloring agent is sprayed onto the plating layer z to form an extremely thin colored film 33 that is laminated and integrated.
In that case, it goes without saying that the undulations of the previously applied uneven pattern 32 do not disappear afterwards and are utilized as they are.

The reason for using the vacuum evaporation method or the ion plating method as the thin film forming technique is mainly to enrich the surface gloss and increase the light reflectance. It should be noted that the colored film 33 can be colored not only in a single color to the entire reflecting plate D, but also in a plurality of different colors, such as a two-tone color, for example.

Furthermore, while 34 is located inside the instrument body A, the reflector plate D is arranged so as to close the opening surface of the instrument body A.
It is a convex lens supported directly above the lamp 26 so as to face each other at a constant interval, and functions to magnify the light reflected by the lamp 26 by the reflector D and project it onto the wall surface W or the ceiling surface R. Moreover, that convex lens 3
4 is a lens holding cover 35 and a lens receiver cover 3
A pair of upper and lower lenses 6 form a lens unit E which is clamped and fixed in advance and is separate and independent from the instrument body A.

That is, as is clear from FIGS. 6 and 7, which show the lens unit E extracted, the upper lens holding cover 35 has a flat ring shape.
On the other hand, the lower lens receiver cover 36 is formed into a hat shape with an annular projecting flange portion 37, and the convex lens 34 is held between the upper and lower pairs of rubber cushion rings 38, 39. . Reference numeral 40 denotes a plurality of machine screws for joining and fixing both the covers 35 and 36. Therefore, when assembling the convex lens 34 into the instrument body A,
Its handling can be done extremely conveniently and safely.

Reference numerals 41 and 42 refer to a plurality of openings (in the illustrated example, they are arranged radially symmetrically when viewed from above) that are formed through the joint surface of the annular flange portion 37 of the lens holding cover 35 and the lens receiving cover 36 so as to coincide with each other. There are three keyholes in total, each of which has an opening configuration in which a circular hole S1 with a large diameter and an elongated hole S2 with a small opening width are continuous. Reference numerals 43 and 44 designate a plurality of heat dissipation holes which are opened through the covers 35 and 36 so as to coincide with each other between the adjacent key holes 41 and 42.

On the other hand, in order to support the lens unit E, there is a
As is clear from FIGS. 8 and 9, a plurality of inverted L-shaped spring holders 45 (again, three in total) are welded in a radially symmetrical arrangement corresponding to the key holes 41 and 42. Reference numeral 46 designates a plate piece that projects horizontally inward from each spring holder 45, and has a screw hole 47 carved therein. Reference numeral 48 is an adjustment screw screwed into the screw hole 47 in an upright extending state parallel to the cylindrical core line of the instrument body A, and its large diameter head a is used to lock a rotating tool (not shown). A groove 49 is provided.

Then, by adjusting the adjustment screw 48, the spring holder 4
5, an annular lens cover receiving plate 50 is attached and held, so 51 is a hole for receiving an adjustment screw bored in the receiving plate 50, and 52 is a hole between adjacent holes 51. The opened heat radiation hole 53 is a compression coil spring that is wound around the shaft part b of each adjustment screw 48, and is located between the receiving plate 50 and the horizontal plate piece 46 of the spring holder 45. , a pushing up elastic force is applied to the receiving plate 50. In other words, the lens cover receiving plate 50 that receives the lens unit E is rotated by its spring 53.
Therefore, it is always maintained in an elastically biased state in the direction of being pushed out from the instrument body A.

The lens unit E has both covers 35,
36 is a large diameter circular hole portion S1 of the key holes 41 and 42
and the large-diameter head a of the adjustment screw 48 rising from the spring holder 45, the adjustment screw 48
and then horizontally rotated in one direction so that the small diameter elongated hole portion S2 of the key holes 41 and 42 matches the small diameter shaft portion b of the adjustment screw 48.
It is removably locked to the adjustment screw 48 and is prevented from coming off from the large diameter head a.
It is assembled and held within the instrument body A. Therefore, it is also possible to pull out the lens unit E from the adjustment screw 48 on the instrument body A side by horizontally rotating it in the opposite direction to that described above.

In that case, both the lens covers 35, 36 and their receiving plate 50 are pushed down while resisting the elastic force of the spring 53, so when you release the rotation operator, the elastic restoring force of the spring 53 allows the convex lens to 34 unit bodies E are held stably without wobbling. In addition, the adjustment screw 48 is moved forward and backward using a rotating tool that is inserted through the opening of the instrument body A.
In magnifying and projecting the reflected light by the convex lens 34, the focal distance between it and the wall surface W and the ceiling surface R can be adjusted freely.

In addition, based on the illustrated embodiment, the store wall W
In other words, although it has been described as a spot lighting fixture that is mounted upward and used, it goes without saying that it can also be mounted and used horizontally and horizontally on the ceiling surface R.

<Effects of the Invention> As described above, in the present invention, a cylindrical appliance body A with a substantially U-shaped cross section that is directly attached to the indoor wall surface W or ceiling surface R of a store, and an opening in the same direction as the appliance body A. Cross section abbreviated to U
A reflector holder C, which has a small diameter cylindrical shape and is fixedly integrated into the bottom wall of the appliance main body A, a lamp socket 24, which is fixedly installed on the bottom wall of the holder C, and a lamp socket 24 from which the appliance can be connected. A halogen lamp 26 is installed along the cylindrical core line of the main body A, and a substantially conical saucer-shaped reflecting plate D is installed in the holder C so as to surround the lamp 26 in order to reflect the light emitted from the lamp 26. In order to enlarge and project the reflected light from the arc-shaped inner wall surface of the reflector D onto the indoor wall W and ceiling R, the reflector D faces the reflector D at a constant distance. , a spot lighting device for a store, which is equipped with a convex lens 34 that faces the opening surface of the device body A so as to close the opening surface of the device body A, and the reflector D is removably fitted into the edge of the opening of the holder C, and the A scale pattern, a floral pattern, a geometric pattern, or other constant uneven pattern 32 is formed on the light reflecting surface of the reflecting plate D, and a colored coating 33 of a constant color is applied to the entire surface of the uneven pattern 32. By adhering and integrating the uneven state so that it does not disappear, the light reflected from the light reflecting surface of the reflecting plate D is given a bright and dark pattern by the uneven pattern 32 and a colored color by the colored film 33. , The convex lens 34 is assembled in advance into a lens unit E which is separate and independent from the instrument body A by a pair of annular lens presser cover 35 and lens receiver cover 36 which are in an annular shape smaller than the aperture diameter of the instrument body A and which face each other.
and both covers 35 and 36 are clamped and fixed as
A circular hole S1 with a large diameter and a long hole S with a small diameter are provided at the peripheral edge of the
2, a plurality of key holes 41, 42 that communicate with each other,
A plurality of spring holders 4 are formed from the body wall of the instrument body A through the overall radially symmetrical distribution.
5 into the key holes 41 and 42 of the lens unit E.
An adjustment screw 48 is integrally extended inward as an overall radially symmetric distribution type corresponding to the above, and each spring holder 45 has a large diameter head a and a small diameter shaft part b.
The shaft portion b of the instrument body A is screwed together so that it can move forward and backward in a direction parallel to the cylindrical core line of the instrument body A, and the entire adjustment screw 48 supports an annular lens cover receiving plate 50 that receives the lens unit E. By winding the compression coil spring 53 interposed between the lens cover receiving plate 50 and the spring holder 45 facing each other around the shaft portion b of each adjustment screw 48, the lens cover receiving plate 50 is always held in the main body of the instrument. The head a of the adjustment screw 48 is biased in the direction of pushing out from A, and while resisting the elastic force.
By removably locking the key holes 41 and 42 of the lens unit E, the lens unit E is assembled and held in the instrument body A, and the adjusting screw 48 is inserted into the instrument body A while being held in this state. By moving forward and backward from the aperture surface of the convex lens 3,
Since the focal length of 4 can be adjusted, the problems of the conventional technology mentioned at the beginning can be reliably improved, and it can be used as a temporary new and interesting method for interior decoration of shop windows and other stores. This allows you to obtain elegant lighting effects.

That is, in the case of the present invention, the light reflecting surface of the reflecting plate D has:
Since the scale pattern, floral pattern, geometric pattern, and other uneven patterns 32 are shaped by the undulating lines of the unevenness, the light reflected from them is As a so-called woven pattern of light and shadow that changes from brightness to darkness or yin and yang based on the unevenness, it is transmitted through the convex lens 34 and is enlarged and projected onto the indoor wall surface W and ceiling surface R in a clearly visible state.

In addition, a colored film 33 of a constant color is integrally attached to the entire surface of the uneven pattern 32 so that the uneven state does not disappear.
The reflected light is also given the color of the colored film 33, and as a result, it is possible to achieve a decorative and dramatic effect with a complicated and colorful light pattern that cannot be obtained with a color filter. From that point of view, it is simply a matter of adding a hammered pattern (irregularities) to the light-reflecting surface of a reflector plate to suppress glare, such as in Utility Model Application Publication No. 55-161303 and Japanese Patent Application Publication No. 58-152301. different from others.

Needless to say, the uneven pattern 32 and the colored film 33 are formed on the reflecting plate D itself, so there is no need for a separate color filter.

In addition, in the case of the present invention, such a reflector D is fitted into the opening edge of the reflector holder C so that it can be attached and detached, so that the reflector D can be attached to the uneven pattern 32 of a different pattern or the colored coating 33. By replacing it with the one that comes with it, you can use the main body A as it is, but you can also freely change the interior presentation and decoration effect according to your preference, and it is also versatile. Remarkably superior.

Furthermore, the convex lens 34 of the present invention is clamped and fixed by the lens holding cover 35 and the lens receiving cover 36, and is formed as a lens unit E that is separate and independent from the instrument body A, making it extremely convenient. Of course, it can be handled without danger.
A plurality of key holes 41 and 42 are provided at the peripheral edges of both covers 35 and 36, and the key holes 41 and 42 communicate with each other through a circular hole S1 with a large diameter and an elongated hole S2 with a small diameter. It is also formed through.

On the other hand, a plurality of spring holders 45 are attached to the body wall of the instrument body A, and a plurality of spring holders 45 are connected to the keyholes 41 of the lens unit E,
42, each spring holder 45 has an adjustment screw 48 with a large diameter head a and a small diameter shaft part b. The shaft part b of the instrument body A is screwed together so that it can move forward and backward in a direction parallel to the cylindrical core line of the instrument body A, and the annular lens cover receiving plate 50 that receives the lens unit E is supported by the entire adjustment screw 48. At the same time, the compression coil spring 53 interposed between the lens cover receiving plate 50 and the spring holder 45 facing each other is wound around the shaft portion b of each adjustment screw 48, so that the lens cover receiving plate 50 is The head a of the adjustment screw 48 is constantly biased in a resilient state in the direction of being pushed out from the instrument body A, and while resisting the resilient force, the head a of the adjustment screw 48 is
Since the keyholes 41 and 42 of the lens unit E are removably locked, the lens unit E is assembled and held in the instrument body A, so that the convex lens 34 can be attached to the lens. Each unit E can be easily and stably assembled to the instrument body A in a so-called one-touch manner, and can also be removed efficiently.

Moreover, once assembled and held, the compression coil spring 5 interposed between the lens cover receiving plate 50 and the spring receiving base 45 of the lens unit E
3, the lens cover receiving plate 50 is maintained in an elastically biased state in close contact with the lens unit E, so that even if it is subjected to vibrations or shocks, this is effectively absorbed by itself. It has outstanding durability and stability in the assembled state. In this sense, the spot lighting device of the present invention can be installed and used not only vertically on the indoor wall surface W, but also horizontally on the ceiling surface R without any problem.

Furthermore, since the lens unit E is in an elastic state where it is assembled and held in the instrument body A without wobbling by the compression coil spring 53, by moving the adjusting screw 48 forward and backward from the opening surface of the instrument body A, Adjusting the focal length of the convex lens 34 can be done very easily and stably, and the adjusted state can be maintained accurately.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing the installed state of the lighting fixture according to the present invention, FIG. 2 is a sectional view taken along the - line in FIG. 1,
Figures 3 to 5 are its rear view, top view, and bottom view;
6 and 7 are a side view and a plan view showing an extracted unit body of a convex lens, FIG. 8 is a side sectional view of the instrument main body showing a state in which the unit body is removed, FIG. 9 is a plan view, and FIG. The figure is a partially enlarged sectional view of the reflector, Figures 11 and 12 are overall schematic plan views showing two types of forms of providing uneven patterns on the reflector, and Figure 1
FIG. 3 is an explanatory diagram suggesting an enlarged projection state of reflected light. A...Appliance body, B...Casing frame, C...Reflector holder, D...Reflector, E...Unit body, R...Ceiling surface,
W...Wall surface, 26...Halogen lamp, 32...Irregular pattern, 33...Colored film, 34...Convex lens, 35...Lens holder cover, 36...Lens receiver cover, 4
1, 42...Key hole, 45...Spring holder, 48...Adjustment screw, 50...Lens cover receiving plate, 53...Coil spring.

Claims (1)

[Claims] 1. A cylindrical appliance body A with a substantially U-shaped cross section that is used by being directly attached to an indoor wall surface W or ceiling surface R of a store, and a cross section approximately U that opens in the same direction as the appliance body A.
A reflector holder C, which has a small diameter cylindrical shape and is fixedly integrated into the bottom wall of the appliance main body A, a lamp socket 24, which is fixedly installed on the bottom wall of the holder C, and a lamp socket 24 from which the appliance can be connected. A halogen lamp 26 is installed along the cylindrical core line of the main body A, and a substantially conical saucer-shaped reflecting plate D is installed in the holder C so as to surround the lamp 26 in order to reflect the light emitted from the lamp 26. In order to enlarge and project the reflected light from the arc-shaped inner wall surface of the reflector D onto the indoor wall W and ceiling R, the reflector D faces the reflector D at a constant distance. , a spot lighting device for a store, which is equipped with a convex lens 34 that faces the opening surface of the device body A so as to close the opening surface of the device body A, and the reflector D is removably fitted into the edge of the opening of the holder C, and the A scale pattern, a floral pattern, a geometric pattern, or other constant uneven pattern 32 is formed on the light reflecting surface of the reflecting plate D, and a colored coating 33 of a constant color is applied to the entire surface of the uneven pattern 32. By adhering and integrating the uneven state so that it does not disappear, the light reflected from the light reflecting surface of the reflecting plate D is given a bright and dark pattern by the uneven pattern 32 and a colored color by the colored film 33. , The convex lens 34 is assembled in advance into a lens unit E which is separate and independent from the instrument body A by a pair of annular lens presser cover 35 and lens receiver cover 36 which are in an annular shape smaller than the aperture diameter of the instrument body A and which face each other.
and both covers 35 and 36 are clamped and fixed as
A circular hole S1 with a large diameter and a long hole S with a small diameter are provided at the peripheral edge of the
2, a plurality of key holes 41, 42 that communicate with each other,
A plurality of spring holders 4 are formed from the body wall of the instrument body A through the overall radially symmetrical distribution.
5 into the key holes 41 and 42 of the lens unit E.
An adjustment screw 48 integrally protrudes inward as an overall radially symmetric distribution type corresponding to the above, and each spring holder 45 has a large diameter head a and a small diameter shaft part b.
The shaft portion b of the instrument body A is screwed together so that it can move forward and backward in a direction parallel to the cylindrical core line of the instrument body A, and the entire adjustment screw 48 supports an annular lens cover receiving plate 50 that receives the lens unit E. By winding the compression coil spring 53 interposed between the lens cover receiving plate 50 and the spring holder 45 facing each other around the shaft portion b of each adjustment screw 48, the lens cover receiving plate 50 is always held in the main body of the instrument. The head a of the adjustment screw 48 is biased in the direction of pushing out from A, and while resisting the elastic force.
By removably locking the key holes 41 and 42 of the lens unit E, the lens unit E is assembled and held in the instrument body A, and the adjustment screw 48 is inserted into the instrument body A while being held in this state. By moving forward and backward from the aperture surface of the convex lens 3,
A spot lighting device for a store, characterized in that the focal length of 4 is adjustable.