JP7102949B2 - lamp - Google Patents

Description

The present invention relates to a lamp.

For example, a lamp having a light emitting element such as an LED (Light Emitting Diode) as a light source is widely used. Patent Document 1 below discloses a lamp in which a plurality of the light source units are arranged around a central axis of the lamp with the back surface of a flat plate-shaped light source unit having a light source substrate on which a light emitting element is mounted facing inward.

Japanese Patent No. 5559824

For example, when a new type of lamp such as an LED lamp is attached to a lamp as an alternative to a conventional lamp such as a mercury lamp, the lamp may interfere with the lamp and it may be difficult to attach the lamp. For example, in a lamp equipped with an umbrella-shaped reflector, the lamp may interfere with the reflector and cannot be attached.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a lamp that can be easily attached to a lamp.

The lamp according to the present invention includes a light source unit having a light source substrate, a base, and a lamp length adjusting mechanism capable of adjusting the lamp length by moving the light source unit with respect to the base in the direction of the lamp axis. A lamp in which the position of the light source substrate and the position of the lamp length adjusting mechanism overlap with respect to the position in the lamp axis direction at the shortest position, and the lamp length adjusting mechanism is screwed into the feed screw and the feed screw. When the feed screw and the screw member rotate relative to each other, the light source unit moves in the direction of the lamp axis with respect to the screw member, and electricity is connected between the base and the light source unit. The wiring is located inside the lead screw .

According to the present invention, by providing the lamp length adjusting mechanism, it is possible to provide a lamp that can be easily attached to a lamp.

It is a perspective view which shows the lamp by Embodiment 1. FIG. It is a side view of the lamp shown in FIG. It is sectional drawing which shows the state when the lamp of Embodiment 1 is attached to the lamp of the reflective umbrella type. It is sectional drawing which shows the state when the lamp of Embodiment 1 is attached to the lamp of the reflective umbrella type. It is a side view of the lamp by Embodiment 2. FIG. FIG. 5 is a cross-sectional view of a screwing member and a connecting member included in the lamp shown in FIG. It is a side view of the lamp according to Embodiment 3. It is a side view which shows the feed screw provided in the lamp shown in FIG. 7.

Hereinafter, embodiments will be described with reference to the drawings. Common or corresponding elements in the drawings are designated by the same reference numerals to simplify or omit duplicate description. The present disclosure may include any combination of configurable configurations among the configurations described in each of the following embodiments.

Embodiment 1.
FIG. 1 is a perspective view showing the lamp 1A according to the first embodiment. FIG. 2 is a side view of the lamp 1A shown in FIG. The use of the lamp 1A of the present embodiment shown in these figures is not particularly limited. The lamp 1A of the present embodiment can be attached to an electric socket provided in indoor and outdoor lighting equipment such as a street light, a road light, a park light, and a high ceiling light. The lamp 1A may be used as an alternative to a conventional High Intensity Discharge (HID) lamp, such as a mercury lamp.

The lamp 1A includes a light source unit 2 and a base 3. The lamp axis AX corresponds to the central axis of the lamp 1A. In the following, for convenience of explanation, the upper and lower parts are specified in the posture of the lamp 1A shown in FIGS. 1 and 2. However, the lamp 1A may be used in any posture such that the base 3 faces upward or diagonally upward, the base 3 faces downward or diagonally downward, and the base 3 faces sideways.

The lamp 1A in the present embodiment includes four light source units 2. These light source units 2 have the same or similar configurations to each other. The plurality of light source units 2 are arranged at different positions with respect to the circumferential direction centered on the lamp axis AX. In the present embodiment, the four light source units 2 are arranged at equal angular intervals of 90 ° with respect to the circumferential direction centered on the lamp axis AX. Each light source unit 2 has a light source substrate 2a on which a light emitting element is mounted and a translucent cover 2b that covers the light source substrate 2a. The light emitted from the light emitting element of the light source substrate 2a passes through the translucent cover 2b and is radiated to the outside of the lamp 1A. The light source unit 2 may include at least one light emitting element among a light emitting diode (LED), an organic electroluminescence (EL) element, and a semiconductor laser element.

The light source unit 2 and the light source substrate 2a in the present embodiment have an elongated outer shape with the direction of the lamp axis AX as the longitudinal direction. As a result, many light emitting elements can be arranged, which is advantageous in increasing the luminous flux of the lamp 1A.

The lamp 1A includes a base 3. The base 3 in the present embodiment is a screw-in type base that can be connected by screwing into an electric socket. The base 3 may be, for example, an E39 base having a diameter of 39 mm, an E26 base having a diameter of 26 mm, or the like. The lamp 1A can be attached to the lamp by screwing the base 3 into the electric socket provided in the lamp. The lamp 1A may include a plug-in type base instead of the screw-in type base 3 as shown in the figure.

The lamp 1A includes a base portion 4, a feed screw 5, and a screwing member 6. The base portion 4 is fixed to the base portion 3. The lead screw 5 projects from the base portion 4 in the direction opposite to that of the base portion 3. The lead screw 5 is rotatable with respect to the base portion 4. The central axis of the lead screw 5 coincides with the ramp axis AX. The screwing member 6 is screwed into the feed screw 5. The screwing member 6 has a plurality of arms protruding toward each light source portion 2. The lower end of each light source portion 2 is fixed to the arm portion of the screwing member 6. The upper end of each light source unit 2 is fixed to a connecting member 7 having a cross shape. The upper ends of each light source unit 2 are connected to each other via a connecting member 7.

The outer cylinder 8 projects downward from the lower surface of the arm portion of the screwing member 6. The inner cylinder 9 projects upward from the upper surface of the base portion 4. The inner cylinder 9 is inserted inside the outer cylinder 8. The central axes of the outer cylinder 8 and the inner cylinder 9 are parallel to the lamp axis AX. The outer cylinder 8 and the inner cylinder 9 are provided in pairs for each light source unit 2.

The feed screw 5, the screwing member 6, the outer cylinder 8 and the inner cylinder 9 in the present embodiment correspond to the lamp length adjusting mechanism. The "lamp length" corresponds to the overall length of the lamp 1A in the direction of the lamp axis AX. The lamp length adjusting mechanism can adjust the lamp length by moving the light source unit 2 with respect to the base 3 in the direction of the lamp axis AX.

In the present embodiment, the feed screw 5 is rotatable with respect to the base 3, and the screwing member 6 is non-rotatable with respect to the light source unit 2. When the feed screw 5 is rotated in the first direction with respect to the base 3, the screw member 6 moves toward the tip of the feed screw 5, and the lamp length becomes longer. When the feed screw 5 is rotated with respect to the base 3 in the direction opposite to the first direction, the screw member 6 moves in the direction closer to the base portion 4, and the lamp length is shortened. According to such a configuration, the lamp length can be adjusted with higher accuracy by adjusting the amount of rotation of the feed screw 5.

When the light source unit 2 moves in the direction of the lamp axis AX, the outer cylinder 8 and the inner cylinder 9 slide with each other, so that the combined length of the outer cylinder 8 and the inner cylinder 9 changes. The outer cylinder 8 and the inner cylinder 9 correspond to guide members that guide the movement of the light source unit 2. By providing such a guide member, the light source unit 2 can be moved more smoothly when adjusting the lamp length.

A knurl 12 is formed at the end of the lead screw 5 on the base portion 4 side. The feed screw 5 can be rotated by turning the knurl 12 with a finger. The feed screw 5 is provided so that the rotation position can be stopped by friction. When the knurl 12 is not turned by a finger, the lead screw 5 does not rotate. The configuration is not limited to this, and the feed screw 5 may be rotated by using a tool. Further, a mechanism for locking the feed screw 5 so as not to rotate may be provided.

1 and 2 show a state in which the lamp length is set to a medium length. In the lamp 1A, the lamp length can be made longer than in the states of FIGS. 1 and 2, and the lamp length can be made shorter than in the states of FIGS. 1 and 2.

The overlapping range OVL in FIG. 2 corresponds to a range in which the position of the light source substrate 2a and the position of the feed screw 5 of the lamp length adjusting mechanism overlap with respect to the position in the direction of the lamp axis AX. When the lamp length is shortened from the state shown in FIG. 2, the overlap range OVL is further expanded. In the present embodiment, the lamp length adjusting mechanism is space-saving by configuring the position of the light source substrate 2a and the position of the lamp length adjusting mechanism to overlap with respect to the position in the direction of the lamp axis AX. Can be placed. Therefore, mounting the lamp length adjusting mechanism is advantageous in suppressing the size of the lamp 1A from becoming large.

When the lamp length is minimized, if the position of the light source substrate 2a and the position of the lamp length adjusting mechanism overlap with respect to the position in the direction of the lamp axis AX, an effect similar to the above effect can be obtained. .. When the lamp length is increased from the state shown in FIG. 2, the overlapping range OVL disappears. As described above, when the lamp length is increased, the position of the light source substrate 2a and the position of the lamp length adjusting mechanism do not have to overlap with respect to the position in the direction of the lamp axis AX.

The lamp 1A has an inner space 10 surrounded by a plurality of light source units 2. In the present embodiment, when the lamp length is minimized, at least a part of the feed screw 5 of the lamp length adjusting mechanism is located in the inner space 10. This is further advantageous in arranging the lamp length adjusting mechanism in a space-saving manner. The same effect can be obtained by setting at least a part of the lamp length adjusting mechanism to be located in the inner space 10 when the lamp length is minimized.

On the back surface side of the light source unit 2, heat radiation fins 11 for dissipating the heat of the light source unit 2 are provided. In the present embodiment, when the lamp length is minimized, the position of the heat radiation fin 11 and the position of the feed screw 5 of the lamp length adjusting mechanism overlap with respect to the position in the direction of the lamp axis AX. This is further advantageous in arranging the lamp length adjusting mechanism in a space-saving manner. In the present embodiment, the heat radiation fin 11 has a shape extending along a direction inclined with respect to the lamp axis AX. The shape of the heat radiating fin 11 is not limited to such a shape, and may be a shape extending parallel to the lamp axis AX, a shape extending perpendicular to the lamp axis AX, or a pin shape. It may have.

Inside the outer cylinder 8 and the inner cylinder 9, an electric wiring 17 for connecting the base 3 and the light source unit 2 is arranged. The electric wiring 17 is connected to the light source substrate 2a from the inside of the outer cylinder 8 through the hollow portion formed inside the screwing member 6 and inside the light source portion 2. Electric power is supplied from the base 3 to the light source substrate 2a via the electric wiring 17. The electrical wiring 17 has a length that can be accommodated when the lamp length is maximized. In the present embodiment, by arranging the electric wiring 17 inside the outer cylinder 8 and the inner cylinder 9 constituting the guide member of the lamp length adjusting mechanism, the exposure of the electric wiring 17 can be suppressed, so that the electric wiring 17 can be suppressed. Can be reliably protected. Further, since the outer cylinder 8 and the inner cylinder 9 can also be used as a protective member for the electric wiring 17, it is advantageous in reducing the number of parts.

3 and 4 are cross-sectional views showing a state in which the lamp 1A of the first embodiment is attached to the reflective umbrella type lamp 100. 3 and 4 correspond to a cross-sectional view cut along a plane including the lamp axis AX. The lamp 100 includes an umbrella-shaped reflector 101. The light emitted from the light source unit 2 is reflected by the inner surface of the reflector 101 and is radiated from the lamp 100 toward the upper side in the drawing. FIG. 3 shows a state in which the lamp length of the lamp 1A is shortened. In this state, the light source portion 2 of the lamp 1A interferes with the root portion of the reflector 101, so that the lamp 1A cannot be attached to the lamp tool 100.

FIG. 4 shows a state in which the lamp length of the lamp 1A is increased. In this state, the light source portion 2 of the lamp 1A and the root portion of the reflector 101 do not interfere with each other, and the lamp 1A can be attached to the lamp 100. Further, since the position of the light source unit 2 can be adjusted up and down in the lamp 100, the spread of the light emitted from the lamp 100 can be adjusted. Therefore, it is possible to irradiate the irradiation target with more appropriate light.

As shown in the examples of FIGS. 3 and 4, according to the present embodiment, by providing the lamp length adjusting mechanism, it is possible to provide the lamp 1A that can be easily attached to various lamps.

Embodiment 2.
Next, the second embodiment will be described with reference to FIGS. 5 and 6, but the differences from the above-described first embodiment will be mainly described, and the same part or the corresponding part will be simplified or explained. Omit. FIG. 5 is a side view of the lamp 1B according to the second embodiment.

The feed screw 5 included in the lamp 1B shown in FIG. 5 is non-rotatable with respect to the base portion 3 and the base portion 4. The screwing member 13 is screwed into the feed screw 5. A connecting member 14 is provided around the screwing member 13. The lower end of each light source unit 2 is fixed to the connecting member 14. The lower ends of each light source unit 2 are connected to each other via a connecting member 14.

FIG. 6 is a cross-sectional view of the screwing member 13 and the connecting member 14 included in the lamp 1B shown in FIG. The connecting member 14 has a circular hole in the center, and the screwing member 13 is fitted inside the hole. The edge of the hole of the connecting member 14 is inserted into the annular groove formed on the outer peripheral surface of the screwing member 13. The screwing member 13 is rotatable inside the connecting member 14. Further, as in the first embodiment, the electric wiring 17 connecting the base 3 and the light source unit 2 is arranged inside the outer cylinder 8 and the inner cylinder 9.

The light source unit 2 and the connecting member 14 move in the direction of the lamp axis AX together with the screwing member 13. When the screwing member 13 is rotated in the first direction, the screwing member 13 moves toward the tip of the feed screw 5, and the lamp length becomes longer. 5 When the screwing member 13 is rotated in the direction opposite to the first direction, the screwing member 13 moves in the direction closer to the base portion 4, and the lamp length is shortened.

In the present embodiment, the feed screw 5 is non-rotatable with respect to the base 3, and the screw member 13 is rotatable with respect to the light source unit 2. Since it is not necessary to provide the feed screw 5 rotatably with respect to the base 3, it is advantageous in simplifying the structure.

Embodiment 3.
Next, the third embodiment will be described with reference to FIGS. 7 and 8, but the differences from the above-described second embodiment will be mainly described, and the same or corresponding parts will be simplified or explained. Omit. FIG. 7 is a side view of the lamp 1C according to the third embodiment.

The lamp 1C according to the third embodiment is different from the second embodiment in that the electric wiring 15 connecting the base 3 and the light source unit 2 is arranged inside the feed screw 5. The lead screw 5 in the present embodiment has a hollow portion, and the electric wiring 15 is arranged in the hollow portion.

The lamp 1C includes a guide member 16 instead of the outer cylinder 8 and the inner cylinder 9. The guide member 16 is fixed to the base portion 4. The guide member 16 is a rod-shaped member parallel to the lamp axis AX. The guide member 16 is inserted into a hole formed in the connecting member 14. By sliding the connecting member 14 along the guide member 16, the light source unit 2 can smoothly move in the direction of the lamp axis AX. No electrical wiring 15 is arranged inside the guide member 16.

FIG. 8 is a side view showing the feed screw 5 included in the lamp 1C shown in FIG. 7. As shown in FIG. 8, the lead screw 5 in the present embodiment is formed with an elongated groove-shaped notch 5a. The electrical wiring 15 exits from the inside of the feed screw 5 through the notch 5a to the outside of the feed screw 5 and is connected to the light source unit 2. In the present embodiment, by arranging the electric wiring 15 inside the feed screw 5 constituting the lamp length adjusting mechanism, the exposure of the electric wiring 15 can be suppressed, so that the electric wiring 15 can be reliably protected. can. Further, since the feed screw 5 can also be used as a protective member for the electric wiring 15, it is advantageous in reducing the number of parts.

When the lamp length is changed by the lamp length adjusting mechanism, the light source unit 2 moves relative to the feed screw 5. At that time, the electric wiring 15 of the portion of the feed screw 5 extending from the inside to the outside can move along the notch 5a. As a result, the electric wiring 15 can be smoothly followed by the movement of the light source unit 2.

1A, 1B, 1C lamp, 2 light source, 2a light source board, 2b translucent cover, 3 base, 4 base, 6 screwing member, 7 connecting member, 8 outer cylinder, 9 inner cylinder, 10 inner space, 11 heat dissipation Fins, 12 laurets, 13 screwing members, 14 connecting members, 15 electrical wiring, 16 guide members, 17 electrical wiring, 100 lamps, 101 reflectors

Claims (6)

A light source unit having a light source substrate and
With the base
A lamp length adjusting mechanism capable of adjusting the lamp length by moving the light source unit in the direction of the lamp axis with respect to the base is provided.
A lamp in which the position of the light source substrate and the position of the lamp length adjusting mechanism overlap with respect to the position in the lamp axis direction when the lamp length is minimized .
The lamp length adjusting mechanism includes a feed screw and a screwing member screwed into the feed screw.
When the feed screw and the screwing member rotate relative to each other, the light source unit moves with respect to the mouthpiece in the lamp axis direction together with the screwing member.
A lamp in which an electrical wiring connecting the base and the light source unit is arranged inside the feed screw. It has an inner space surrounded by the light source unit and has an inner space.
The lamp according to claim 1, wherein at least a part of the lamp length adjusting mechanism is located in the inner space when the lamp length is minimized. It is provided with heat dissipation fins that dissipate the heat of the light source unit.
The lamp according to claim 1 or 2, wherein the position of the heat radiation fin and the position of the lamp length adjusting mechanism overlap with respect to the position in the lamp axis direction when the lamp length is minimized. With a notch formed in the lead screw,
The lamp according to any one of claims 1 to 3, wherein the electrical wiring can be inserted into the notch. The lead screw is rotatable with respect to the mouthpiece and
The lamp according to any one of claims 1 to 4 , wherein the screwing member cannot rotate with respect to the light source unit. The lead screw is non-rotatable with respect to the base and
The lamp according to any one of claims 1 to 4 , wherein the screwing member is rotatable with respect to the light source unit.

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