KR20100038313A - Light source device and light emitting tube - Google Patents

Abstract

It is an object to make cooling efficiency for a light emitting tube as much improved as possible with the avoidance of increase in device cost. A light source device is provided with a light emitting tube (1) including outer connection electrodes (EO) at both edge portions in its longitudinal direction, and a cooling member (CM) formed to be substantially cylindrical for cooling the light emitting tube (1) arranged in its inner space in a non-contact condition, wherein the light emitting tube (1) is set in its existing position in the inner space so that an interval between the upper end of the light emitting tube (1) and the inner wall of the cooling member (CM) is shorter than that between the lower end of the light emitting tube (1) and the inner wall of the cooling member (CM).

Description

LIGHT SOURCE DEVICE AND LIGHT EMITTING TUBE}

The present invention includes a light emitting tube having external connecting electrodes at both ends in the longitudinal direction, and a cooling member which is formed in a substantially cylindrical shape and cools the light emitting tube arranged in a non-contact state in an internal space. It relates to a light source device, and a light emitting tube suitable for use in the light source device.

Such a light source apparatus is an apparatus for irradiating the light radiate | emitted from the light emitting tube, such as an ultraviolet-ray, to various process targets and performing predetermined process, such as hardening of resin.

Such a light source device is provided with a means for cooling the light emitting tube to a high temperature during the lighting operation so as to suppress excessive temperature rise of the light emitting tube.

As the structure of the said cooling means, for example, as described also in following patent document 1, it is considered to arrange | position cooling members, such as a water cooling jacket, in the state surrounding the light emitting tube.

The water-cooled jacket of the following patent document 1 is comprised by the quartz double tube in order to transmit the light radiate | emitted from the light emitting tube, and it is set as the structure which makes cooling water flow in the space between the inner tube and external appearance of this double tube.

Conventionally, the arrangement of the light emitting tube in the inner space of the water-cooled jacket is made to match the central axis of the inner space (the central axis of the inner tube) and the central axis of the light emitting tube from the thought of cooling the light emitting tube evenly. It was set as the structure arrange | positioned at the center position of space.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2004-39511

However, with the recent increase in the output of the light emitting tube, in the case where the light emitting tube is arranged as in the conventional configuration, the cooling efficiency for the light emitting tube may be insufficient.

The present invention has been made to solve such a problem, and an object thereof is to improve the cooling efficiency for the light emitting tube as much as possible while avoiding an increase in device cost.

A first invention of the present application includes a light emitting tube having electrodes for external connection at both ends in a longitudinal direction, and a cooling member which is formed in a substantially cylindrical shape and cools the light emitting tube disposed in a non-contact state in an inner space. In the light source device, in the light emitting device, the distance between the upper end of the light emitting tube and the inner wall of the cooling member is greater than the distance between the lower end of the light emitting tube and the inner wall of the cooling member. The existence position is set and comprised so that it may become short.

In other words, as the output of the light emitting tube increases, the heat generation from the light emitting tube also increases. The heat radiated from the light emitting tube is not spread evenly in the inner space of the cooling member surrounding the light emitting tube, but rather fills the upper portion of the light emitting tube under the influence of gravity. As a result, there is a nonuniform heat distribution in the internal space.

Therefore, in the case where the light emitting tube is disposed in the center of the inner space of the cooling member, the cooling effect on the upper portion of the light emitting tube is insufficient.

Thus, as the arrangement of the light emitting tube in the internal space of the cooling member, the distance between the upper end of the light emitting tube and the inner wall of the cooling member is arranged to be shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member. have. In other words, the light emitting tube is disposed upward in the inner space of the cooling member.

In addition, an upper end, a lower end, an upper direction, and a lower side mean the upper and lower sides in the direction of gravity, ie, a perpendicular direction.

By such arrangement, the upper end of the light emitting tube approaches the inner wall of the cooling member, and the cooling effect from the inner wall of the cooling member is stronger.

If the heat generated from the light emitting tube becomes extremely extreme, the light emitting tube may be bent downward by the heat.

When the light emitting tube is bent downward in this manner, when the lower end side of the light emitting tube contacts the inner wall of the cooling member, the contact point in the light emitting tube is too cooled to maintain a normal lighting state. Thus, by arranging the light emitting tube as described above, the distance between the lower end side of the light emitting tube and the inner wall of the cooling member is relatively long, thereby avoiding contact with the inner wall of the cooling member even when the light emitting tube is curved. .

In addition, in the second invention of the present application, in addition to the configuration of the first invention, the light emitting tube is a straight tube light emitting tube.

Since the straight tube-shaped light tube is susceptible to the above-described heat problem, and problems such as curvature of the light tube are likely to occur, it is particularly useful to arrange the light tube as described above.

In addition, in the third invention of the present application, in addition to the configuration of the first or second invention, the cooling member is formed so that the inner space is substantially cylindrical, and in the light emitting tube, the external connection is The presence of the electrode is supported by an inner wall of the cooling member and a support member fitted inside, and the support member has a shape in which a gap exists between the inner wall of the cooling member in the longitudinal direction. And the support position of the light emitting tube in the support member is set around the upper side of the inner space of the cooling member, as viewed in the longitudinal direction, and among the support members, An anti-rotation member is provided in contact with at least a portion to prevent rotation of the support member, and a gap between the support member and an inner wall of the cooling member is used as a ventilation path. And cooling wind generating means for generating cooling wind for cooling the light emitting tube.

That is, in the case where the said inner space has a substantially cylindrical shape, it is a structure for making the presence position of a light emitting tube in the said inner space upward upward, and in the support member which supports the presence location of the said external connection electrode. It is realized by a simple configuration that only shifts the support position of the light emitting tube around the upper side.

In addition, a gap is formed between the edge of the support member and the inner wall of the cooling member, thereby providing a ventilation path for cooling wind for cooling the light emitting tube.

Moreover, with the simple structure which contacts at least one part of a support member, the anti-rotation member which can prevent a support member from rotating in the internal space of a cooling member can be comprised, and a light tube can be maintained in a proper attitude | position.

In addition, in the fourth invention of the present application, in addition to the configuration of the first or second invention, the cooling member is formed so that the inner space is substantially cylindrical, and in the light emitting tube, the external connection is The presence point of an electrode is supported by the support member fitted in the inner wall of the said cooling member, and the said support member is formed in the shape which becomes a polygon when it sees from the said longitudinal direction, When it sees from the said longitudinal direction, The support position of the said light-emitting tube in the said support member is set around upper side rather than the center of the circumscribed circle of the said support member, and contact | connects at least one side of the said support members of polygonal shape to the said cooling member, The said support An anti-rotation member for preventing rotation of the member is provided, and the light emitting tube is formed using a gap between the support member and the inner wall of the cooling member as a ventilation path. Cooling wind generating means for generating cooling air to cool is provided.

That is, in the case where the said inner space has a substantially cylindrical shape, it is a structure for making the presence position of a light emitting tube in the said inner space upward upward, and in the support member which supports the presence location of the said external connection electrode. It is realized by a simple configuration that only shifts the support position of the light emitting tube around the upper side.

The support member has a polygonal shape when viewed in the longitudinal direction of the light emitting tube, and is cooled to cool the light emitting tube by using a gap formed between the end of the supporting member and the inner wall of the cooling member. I assume the ventilation route of the wind.

In addition, since the support member has a polygonal shape, it is a simple configuration that contacts at least one side thereof, so that a rotation preventing member that prevents the support member from being rotated in the internal space of the cooling member can be configured, so that the light tube is properly positioned. Can be maintained.

In addition, in the fifth invention of the present application, in addition to the configuration of the second invention, the light emitting tube is provided with a supporting member for supporting the presence of the external connection electrode, and is viewed in the longitudinal direction. The center of the circumscribed circle of the member and the center of the circumscribed circle of the light emitting tube in the central portion in the longitudinal direction are set to a light emitting tube formed in a position shifted position.

Therefore, by using the cylindrical cooling member whose internal space conventionally exists in the substantially cylindrical shape as it is, setting only the light emitting tube provided with the support member which has the said structure in the internal space, In a light source device, The positional relationship of the light emitting tube in the inner space can be set so that the distance between the upper end of the light emitting tube and the inner wall of the cooling member is shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member.

Moreover, in the 6th invention of this application, in the straight tube light emitting tube provided with the electrode for external connection in the both ends of a longitudinal direction, the support member which supports the presence location of the said external connection electrode is provided, The said length As viewed from the direction, the center of the circumscribed circle of the support member and the center of the circumscribed circle of the light emitting tube in the central portion in the longitudinal direction are formed in a displaced state.

Therefore, in incorporating the light emitting tube having the above-described configuration into the light source device, a support member having the above-described configuration is provided in the inner space by using a cylindrical cooling member in which a conventionally existing internal space has a substantially cylindrical shape. By setting only one light emitting tube, the distance between the upper end of the light emitting tube and the inner wall of the cooling member is shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member. You can set the positional relationship.

According to the first aspect of the invention, the light emitting tube is simply placed upward in the inner space of the cooling member, and the upper end of the light emitting tube is closer to the inner wall of the cooling member, and the upper end of the light emitting tube is removed from the inner wall of the cooling member. Cooling action becomes stronger.

Thus, it is possible to further improve the cooling efficiency for the light emitting tube while avoiding an increase in the apparatus cost.

According to the second aspect of the present invention, when a straight tube-shaped light emitting tube is used, the cooling efficiency of the light emitting tube can be effectively improved, and it is possible to avoid problems such as curvature of the light emitting tube.

Further, according to the third aspect of the present invention, the cooling air for cooling the light emitting tube is cooled by using the support member of the light emitting tube provided as a configuration for biasing the position of the light emitting tube upward in the internal space of the cooling member. It is also possible to form a path and prevent the rotation of the light tube to maintain the proper posture, so that the supporting member for supporting the light tube can be multifunctional and effectively utilized.

According to the fourth aspect of the present invention, cooling for cooling the light emitting tube is performed by making the support member of the light emitting tube provided as a configuration for biasing the position of the light emitting tube in the inner space of the cooling member upward. It can also be used to form a ventilation path of the air and at the same time prevent the rotation of the light emitting tube and maintain it in an appropriate posture, whereby the supporting member for supporting the light emitting tube can be multifunctional and effectively utilized.

Further, according to the fifth aspect of the present invention, only a light emitting tube having a support member having the above structure is set in the inner space by using a cylindrical cooling member in which a conventionally existing inner space has a substantially cylindrical shape. Therefore, in the light source device, the positional relationship of the light emitting tube in the internal space such that the distance between the upper end of the light emitting tube and the inner wall of the cooling member is shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member. In this way, the cooling efficiency for the light emitting tube can be improved as much as possible while avoiding an increase in the apparatus cost.

According to the sixth aspect of the present invention, in the case of assembling the light emitting tube into the light source device, the above-described constitution is applied to the inner space by using a cylindrical cooling member in which the existing inner space has a substantially cylindrical shape. By setting the light emitting tube having the supporting member, the space between the upper end of the light emitting tube and the inner wall of the cooling member is shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member. Since the positional relationship of the light emitting tube can be set, the cooling efficiency with respect to a light emitting tube can be improved as much as possible, avoiding the increase of apparatus cost.

1 is a partial cross-sectional view of a light source device according to an embodiment of the present invention.

2 is a partial cross-sectional view of an essential part of an embodiment of the present invention.

3 is a side view of the light source device according to the embodiment of the present invention.

4 is a view showing a light emitting tube according to another embodiment of the present invention.

5 is a side view of a light source device according to another embodiment of the present invention.

[Explanation of symbols on the main parts of the drawings]

1: light tube

28: anti-rotation member

CA: cooling wind generating means

CM: cooling member

EO: electrode for external connection

SP: support member

An embodiment of a light source device of the present invention will be described below with reference to the drawings.

As shown in the partial sectional view of FIG. 1, the light source device UL of this embodiment is comprised with the light emitting tube 1 and the water cooling jacket 2 which is a cooling member CM which cools the light emitting tube 1 as a main part. .

In addition, in FIG. 1, in order to make a drawing easy to see, the illustration of the diagonal line which shows what was seen from the cross section about the parts other than the light emitting tube 1, and shows the cross section suitably in detail is abbreviate | omitted. Doing.

The light emitting tube 1 of this embodiment is an ultraviolet lamp, and is formed in a rod-shaped, straight tube shape as a whole, and discharge electrodes in the light emitting tube 1 at both ends in the longitudinal direction of the light emitting tube 1. The lead wire 12 for electrodes connected to (11) is sealed, and the part extended to the outside of the light emitting tube 1 in the lead wire 12 for electrodes is taken out as electrode EO for external connection.

The sealing point to the glass tube of the electrode lead wire 12 for electrodes, and the presence point of the electrode EO for external connection are protected by the clasp 13, and the presence point of the clasp 13 is a presence point of the electrode EO for external connection. Is consistent with

The pair of clasps 13 provided at both ends in the longitudinal direction are mounted in a state where the holder 14 is fitted from the outside, and the outer edge of the holder 14 is fitted inside and with the inner wall of the water cooling jacket 2. It is arrange | positioned in the water cooling jacket 2 in a state.

That is, the holder 14 is the support member SP which supports the presence location of the external connection electrode EO in the light emitting tube 1. As shown in FIG.

The water-cooled jacket 2 is constituted by a cylindrical inner tube 21, an outer cylinder 22 having a cylindrical shape and larger in diameter than the inner tube 21, and a member for supporting them, and is generally formed in a substantially cylindrical shape. have.

The light emitting tube 1 is disposed in the inner space of the water cooling jacket 2 (more specifically, mainly in the inner space of the inner tube 21) in a non-contact state with the inner wall of the water cooling jacket 2, and the light emitting tube 1 The water-cooled jacket 2 surrounds the circumference | surroundings of the circumference | surroundings.

The inner tube 21 and the outer tube 22 are all made of quartz, and they are arranged coaxially, and the space between the inner tube 21 and the outer tube 22 serves as a passage for cooling water.

The inner tube 21 is slightly longer than the outer tube 22, and both ends of the inner tube 21 and the outer tube 22 in the longitudinal direction are arranged coaxially by the sealing ring 23. The space | interval between the inner tube 21 and the exterior 22 is hold | maintained constantly.

The sealing ring 23 is provided with a water supply and drainage hole 23a for introducing or discharging the cooling water. In FIG. 1, the water supply hose 24 is connected to the water supply and drainage hole 23a of the sealing ring 23 on the right side. To the water supply side, and the drain hose 25 is connected to the water supply and drain hole 23a of the sealing ring 23 on the left side to be the drainage side.

The pair of sealing rings 23 are supported and positioned by a ring-shaped support member 26, respectively, between the outer 22 and the sealing ring 23, and the inner tube 21 and the sealing. The O-ring is sealed between the ring 23 and the support member 26.

Although the internal space of the water-cooling jacket 2 in which the light emitting tube 1 is arrange | positioned exists a little step | step in the vicinity of the boundary between the inner tube 21 and the support member 26, it is substantially cylindrical shape as a whole.

The air supply duct 3 for sending cooling air to the inner space of the water cooling jacket 2 is connected to the support member 26.

Between the inner tube 21 and the outer tube 22, in the vicinity of the upper center of the water-cooling jacket 2, the exhaust pipe 27 passes through the inner wall 21 and the tube wall of the outer tube 22. Equipped with.

Connection points between the pipes 27, the inner tube 21, and the outer tube 22 are hermetically sealed to prevent leakage of the cooling water.

The cooling water supplied from the water supply hose 24 flows into the space between the inner tube 21 and the outer surface 22 through a space formed at the inner surface side of the sealing ring 23 and the outer surface of the inner tube 21. And is discharged to the drain hose 25 via a space formed on the inner surface of the sealing ring 23 on the opposite side (drainage side) and the outer surface of the inner tube 21.

The holder 14 supporting the clasps 4 at both ends in the longitudinal direction of the light emitting tube 1 is in contact with the edge of the longitudinal direction of the inner tube 21 and is fitted inside the support member 26. It is positioned with.

As shown in FIG. 2 which is an enlarged view of the vicinity of the longitudinal direction edge part of the water-cooling jacket 2, and the side view which is a side view seen in the longitudinal direction of the light emitting tube 1, the holder 14 is a light emitting tube 1 Is formed into a polygonal shape (more specifically, a triangular shape) when viewed in the longitudinal direction, and each vertex thereof is formed on an inner wall of the water-cooled jacket 2 (specifically, the support member 26). The inner wall 26a). The shape of the triangle formed by the holder 14 is an equilateral triangle or an isosceles triangle close thereto so that each vertex abuts against the inner wall of the water-cooled jacket 2 in a good balance.

Since the inner wall 26a is circular when viewed in the longitudinal direction, in the support configuration in which the holder 14 only couples inside to the support member 26, the holder 14 is the center of the internal space of the water-cooled jacket 2. It rotates around an axis (axis β described later).

On the side wall of the support member 26, a rotation preventing member 28 for preventing rotation of the holder 14 is mounted.

As shown in FIG. 2, the anti-rotation member 28 is a member formed by bending a plate in an L shape, and a portion of the lower vertical posture is fixed to the side surface of the support member 26, and a portion of the upper horizontal posture. By contacting the bottom of the holder 14, the rotation of the holder 14 is prevented.

In order to stop the rotation of the holder 14 of the polygon shape (specifically, the triangle), as described above, it can be realized by bringing the rotation preventing member 28 into contact with one side of the polygon shape, but the rotation stops more strongly. In order to prevent this from happening, the rotation preventing member may also be brought into contact with the other side (inclined side) to prevent rotation of the holder 14, and the holder 14 is brought into contact with at least one side of the holder 14 having a polygonal shape in the longitudinal direction. It is good to prevent the rotation of).

In addition, since the inner wall 26a of the support member 26 which each vertex of the holder 14 abuts is circular in the longitudinal direction of the light emitting tube 1, as is also apparent from FIG. 3. A gap exists between the inner wall 26a of the support member 26 and the outer edge of the holder 14, and the gap serves as a ventilation path for the cooling wind supplied from the air supply duct 3.

And although FIG. 2 has shown the right end part (end part of the water supply side) in FIG. 1, the structure of the left end part (end part of the drain side) on the opposite side is also comprised symmetrically in the same structure.

Also in FIG. 2, similar to FIG. 1, the part other than the light emitting tube 1 is shown by cross section, and the detail of the oblique line which shows that it is a cross section suitably is abbreviate | omitted in detail.

3 shows what was seen from the said longitudinal direction from the right end part (end part of the water supply side) in FIG. 1, but the structure of the left end part (end part of the drain side) on the opposite side is also comprised similarly.

In addition, in FIG. 3, illustration of the air supply duct 3, the water supply hose 24, and the external connection electrode EO is abbreviate | omitted in order to make drawing easy to see.

The arrangement position of the light emitting tube 1 in the internal space of the water cooling jacket 2 is not located in the center of the internal space of the water cooling jacket 2, as is apparent from Figs. ) Is biased upwards from the center of the internal space.

Referring to FIG. 3, in the longitudinal direction of the light emitting tube 1, the axis α is the central axis of the light emitting tube 1 extending in the longitudinal direction and is also the center of the clasp 13. It is a position representing the support position of the light emitting tube 1 in the holder 14.

In addition, the axis β is the central axis of the inner space of the water-cooled jacket 2 when viewed in the longitudinal direction of the light emitting tube 1, and is the center of the circumscribed circle of the holder 14. In the present embodiment, since the inner space of the water-cooled jacket 2 is substantially cylindrical, the circle formed by the inner wall 26a of the support member 26 corresponds to the circumscribed circle of the holder 14.

When the axis α and the axis β are in the up-down direction and by a distance corresponding to the gap, the supporting position of the light emitting tube 1 in the holder 14 is the holder 14 in the longitudinal direction of the light emitting tube 1. ) Is set around the center of the circumscribed circle.

Since the light emitting tube 1 is mounted in the position shown in FIG. 3 in the both ends of a longitudinal direction, as a result, the light emitting tube 1 is a posture parallel to the central axis of the said inner space of a substantially cylindrical shape, and In the internal space, the distance (indicated by the distance a in FIG. 2) between the upper end of the light emitting tube 1 and the inner wall of the water cooling jacket 2 (here, the inner wall of the inner tube 21) is the light emitting tube 1. The existence position is set to be shorter than the distance (indicated by the distance b in FIG. 2) between the lower end of the water cooling jacket and the inner wall of the water cooling jacket 2 (inner wall of the inner tube 21), that is, the relationship a <b. do.

As mentioned above, although it demonstrated from the viewpoint of the presence position of the light emitting tube 1 in the internal space of the water cooling jacket 2, when paying attention to the structure of the light emitting tube 1 for making such an existing position, the light emitting tube 1 Viewed from the longitudinal direction, the center of the circumscribed circle (the position of the axis β in FIG. 3) of the holder 14, which is the support member SP for supporting the presence point of the external connection electrode EO, and the longitudinal direction central portion. The center of the circumscribed circle of the light emitting tube 1 is formed in a position shifted position.

In the present embodiment, the light emitting tube 1 has a cylindrical shape except for the longitudinal end portion, and has a shape of an axis target with respect to the central axis, so that the light emitting tube 1 in the longitudinal center portion is provided. The position of the center of the circumscribed circle of I coincides with the position indicated by the axis α in FIG. 3.

By configuring the light emitting tube 1 in this manner, the light emitting tube 1 is inserted into the inner space of the water-cooling jacket 2 which has a substantially cylindrical shape. The setting of the existence position of 1) is realized.

In the state where the water cooling jacket 2 and the light emitting tube 1 are assembled as shown in FIG. 1, cooling water is supplied from the water supply hose 24 and generates a cooling wind for cooling the light emitting tube 1. The light emitting tube 1 is light-driven in the state which cooling air is supplied from the blowing fan 4 which is the generating means CA via the pair of air supply ducts 3.

The light emitting tube 1 generates heat due to the ignition driving, and heat tends to fill the upper side, in particular, but this heat is efficiently caused by the upper part of the light emitting tube 1 being close to the inner wall of the water cooling jacket 2. Removed.

In addition, the cooling wind supplied through the left and right air supply ducts 3 as a ventilation path between the holder 14 and the inner wall 26a of the support member 26 is the periphery of the light emitting tube 1. The light emitting tube 1 is cooled through the space and discharged from the pipe 27 to the outside of the water cooling jacket 2.

[Other Examples]

Hereinafter, another embodiment of the present invention.

(1) In the above embodiment, the light emitting tube 1 itself is the center of the circumferential circle of the holder 14 (the axis β in FIG. 3) and the circumferential circle of the light emitting tube 1 in the longitudinal center portion. Although the center (position of the axis (alpha) in FIG. 3) is formed in the position shifted, the structure of the water-cooling jacket 2 is not made into a special structure, but may be made into the opposite combination.

That is, the light emitting tube 1 itself is formed in the simple shape which made the center of the circumferential circle of the holder 14 and the center of the circumferential circle of the light emitting tube 1 in the said longitudinal direction center part, and the water cooling jacket 2 It is good also as a structure which shifts the support position of the holder 14 in both ends of a position to an upper periphery.

(2) In the above embodiment, the shape of the holder 14, which is the supporting member SP for supporting the presence of the external connection electrode EO in the longitudinal direction of the light emitting tube 1, is illustrated as a triangle. May be a polygon or more of a rectangle.

(3) In the above embodiment, a case is provided in which the cooling air is supplied to the internal space of the water cooling jacket 2 by providing the blowing fan 4, which is the cooling wind generating means CA, but on the wall surface of the water cooling jacket 2; By taking in air from the provided pipe 27 side, you may comprise so that a cooling wind may be sent to the internal space of the water cooling jacket 2.

Moreover, it is good also as a structure which intakes from the air supply duct 3 side.

(4) Although the ultraviolet lamp is illustrated as the light emitting tube 1 in the said Example, this invention is applicable also to the light emitting tube 1 of various wavelengths other than an ultraviolet-ray.

(5) In the above embodiment, the shape of the light emitting tube 1 itself is the shape of the axis object with respect to its central axis α, and the support position of the clasp 13 by the holder 14 is set by the holder 14. By shifting the position from the center (axis β) of the circumscribed circle of the circumferential circle, the center of the circumscribed circle of the support member SP (holder 14) and the light emitting tube in the longitudinal center portion are viewed in the longitudinal direction of the light emitting tube 1. Although the center of the circumscribed circle of (1) is in the state which shifted the position, you may make the shape of the light emitting tube 1 into the shape as shown in FIG.

It demonstrates more concretely by FIG. 4 and FIG. 5 (FIG. Corresponding to FIG. 3 in the said Example) which shows the support state of the light emitting tube 1 in the longitudinal direction of the light emitting tube 1. As shown in FIG. In addition, in FIG. 4 and FIG. 5, the same code | symbol is attached | subjected to the member corresponding to the thing in the said Example. In addition, illustration of the holder 14 is abbreviate | omitted in FIG.

That is, although the light emitting tube 1 is formed in the substantially cylindrical shape like the said Example as a whole, the existence position of the clasp 13 in the longitudinal direction of the light emitting tube 1 is located in the center part of a longitudinal direction. The light emitting tube 1 is formed in a shape shifted from the center of the circumscribed circle (shown as the axis α in the same manner as in the above embodiment).

Also in FIG. 4, the center of the circumscribed circle of the support member SP (holder 14) is shown by the axis (beta), and as shown in FIG. 5, the center of the clasp 13 is an axis | shaft when it sees from the longitudinal direction of the light emitting tube 1. The holder 14 supports the clasp 13 so as to correspond to β. In the example shown in FIG. 5, the clasp 13 is supported in the center position of the holder 14 formed in an equilateral triangle.

With this arrangement configuration, when viewed in the longitudinal direction of the light emitting tube 1, the circumferential circle of the light emitting tube 1 in the center (axis β) of the circumferential circle of the support member SP (holder 14) and the longitudinal direction central portion. The center (axis α) of is to be in a position shifted position.

Claims (6)

A light source device including a light emitting tube having electrodes for external connection at both ends in a longitudinal direction, and a cooling member for cooling the light emitting tube which is formed in a substantially cylindrical shape and disposed in a non-contact state in an internal space, The position of the light emitting tube is set so that the distance between the upper end of the light emitting tube and the inner wall of the cooling member is shorter than the distance between the lower end of the light emitting tube and the inner wall of the cooling member in the inner space. Consisting of Light source device. The method of claim 1, The light emitting device is a light emitting device having a straight pipe shape. The method according to claim 1 or 2, The cooling member is formed such that the inner space is substantially cylindrical. In the light emitting tube, the presence portion of the external connection electrode is supported by a support member fitted inside to the inner wall of the cooling member, The support member is formed in a shape in which a gap exists between the inner wall of the cooling member when viewed in the longitudinal direction, When viewed from the longitudinal direction, the support position of the light emitting tube in the support member is set around the upper side of the inner space of the cooling member, The cooling member is provided with an anti-rotation member which contacts at least a part of the support member to prevent rotation of the support member. And a cooling wind generating means for generating cooling air for cooling the light emitting tube, using a gap between the support member and an inner wall of the cooling member as a ventilation path. The method according to claim 1 or 2, The cooling member is formed such that the inner space is substantially cylindrical. In the light emitting tube, the presence portion of the external connection electrode is supported by a support member fitted inside to the inner wall of the cooling member, The support member is formed in a shape that becomes a polygon when viewed in the longitudinal direction, As viewed from the longitudinal direction, the support position of the light emitting tube in the support member is set around the upper side than the center of the circumscribed circle of the support member, The cooling member is provided with an anti-rotation member which contacts at least one side of the support member having a polygonal shape and prevents rotation of the support member. And cooling air generating means for generating cooling air for cooling the light emitting tube, using a gap between the support member and an inner wall of the cooling member as a ventilation path. The method of claim 2, The light emitting tube, A supporting member for supporting the presence of the external connection electrode is provided, The light source device according to the longitudinal direction, wherein the center of the circumscribed circle of the support member and the center of the circumscribed circle of the light emitting tube in the central portion in the longitudinal direction are light emitting tubes formed in a displaced position. A straight tube light emitting tube having electrodes for external connection at both ends in the longitudinal direction, A supporting member for supporting the presence of the external connection electrode is provided, As viewed from the longitudinal direction, the center of the circumscribed circle of the support member and the center of the circumscribed circle of the light emitting tube in the longitudinal center portion are formed in a state where the position is shifted. Light tube.

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