JP2000011961A - Rare gas discharge lamp and rare gas discharge lamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear gas discharge lamp, in which positional relationship between an inner cap and an outer cap arranged in the ends of an envelope and an aperture part of a luminescent layer can be easily set with comparatively high accuracy and a directional regulating function can be provided. SOLUTION: This discharge lamp is provided with a straight tubular envelope 1 in which a luminescent layer 2 having an aperture part is formed on the inside face, a pair of external electrodes 5, 6 arranged on the outer circumferential face of the envelope 1 over its substantially overall length and made of metallic material, a harness 10 led out from the end of the envelope 1 and provided with an electrical connection relationship with the external electrodes 5, 6, an insulating inner cap 12 arranged on the harness 10 which is led-out side in the end of the envelope 1 and formed into a cylinder substantially, and an insulative protection member 14 filling an inside space of the inner cap 2. In the outer circumference part of the inner cap 12, first and second projecting locking parts 13, 13A having a directional regulating function are formed so that they are provided with a specified relationship with the aperture part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rare gas discharge lamp and a rare gas discharge lamp device, and more particularly to a rare gas discharge lamp and a rare gas discharge lamp device. The present invention relates to a rare gas discharge lamp and a rare gas discharge lamp device in which a strip-shaped external electrode is disposed and an inner cap is attached to an end of an envelope.

[0002]

2. Description of the Related Art A conventional rare gas discharge lamp of this type is constructed by mounting insulating caps H, H at the end of a lamp body L as shown in FIGS. That is, in the lamp main body L, A is a straight tubular envelope that is hermetically sealed by, for example, a glass bulb or the like, and its inner surface is made of a phosphor such as a rare earth phosphor or a halophosphate phosphor. The light emitting layer B is formed. This light emitting layer B
Have an aperture in which the light emitting layer B having a predetermined aperture angle is not formed.
The cha portion Ba is formed over substantially the entire length. The sealing structure of the envelope A is configured by sealing a disk-shaped sealing glass plate to an end of a glass bulb. It can also be configured. A predetermined amount of rare gas such as xenon, krypton, neon, helium or the like which does not contain metal vapor such as mercury is sealed in the enclosed space of the envelope A singly or mixed. A pair of strip-shaped external electrodes C and D made of a metal member are arranged on the outer peripheral surface of the envelope A at a predetermined distance from each other. Protection tube E comprising
It is covered with. Terminals F, F are connected in advance to the ends of the external electrodes C, D, and harnesses G, G for connection to an external circuit are connected to the leading ends. on the other hand,
At the end of the lamp body L, insulating caps H, H are mounted so that the aperture Ba and the mounting ears Hb, Hb of the caps H, H have a predetermined positional relationship. A fixing member J such as hot melt made of a thermoplastic resin is injected and hardened into the inner spaces Ha, Ha of the caps H, H, whereby the lamp main body L and the cap H are fixed.

The rare gas discharge lamp has a harness G and a terminal F.
High frequency high voltage (for example, 25K)
By applying 2500 Vo-p at Hz, a rare gas discharge is generated, and the light emitting layer B is excited by the rare gas excitation line to emit light. Light is transmitted from the aperture Ba to the external electrodes C, D. Is released to the outside through the opening between the ends. In particular, since no mercury is used in this rare gas discharge lamp, the light quantity rises sharply after lighting, and the light quantity reaches almost 100% at the same time as lighting. For this purpose, facsimile,
It is suitable as a light source for reading originals of OA equipment such as an image scanner and a copying machine.

[0004]

The rare gas discharge lamp is used, for example, as shown in FIG. 19, as a light source for reading a document of a document irradiation device. That is, in this document irradiation device, light emitted from the lamp main body L is projected onto a predetermined document surface P in a state where the rare gas discharge lamp is incorporated and the mounting ears Hb, Hb of the caps H, H are fixed to the mounting member. The light reflected from the document surface P is incident on a line sensor S such as a CCD.

Accordingly, the rare gas discharge lamp has an aperture portion of the lamp main body L such that the light from the lamp main body L is projected onto a predetermined document surface P when the rare gas discharge lamp is attached to the original irradiating apparatus. Ba and cap H, mounting ear Hb of H,
Hb is configured to have a predetermined positional relationship.

The positional relationship is determined by rotating the lamp body L clockwise or counterclockwise by hand in a state where the caps H, H are attached to the ends of the lamp body L, and Ba is the cap H, the mounting ear H of H
Adjustment (setting) is performed by fixing the lamp main body L and the caps H, H by injecting the fixing member J into the cap when the predetermined positional relationship is established with respect to b and Hb.

However, in this positioning operation, since the positional relationship is determined by visual observation while rotating the lamp main body L appropriately by hand, not only the work efficiency is low, but also the lamp main body L and the inside of the caps H, H Space H
Since a gap is formed between a and Ha so that the lamp main body L can be easily inserted into the caps H and H, the positional relationship between the two will be lost if the hand is released even if it is bent or positioned. . For this purpose, the lamp main body L is fixed by the fixing member J.
In addition, it is necessary to continue the supporting state until the caps H, H are fixed, and from this point, there is a problem that workability is reduced.

In addition, the rare gas discharge lamp in which the caps H, H are fixed to the end of the lamp main body L as described above is simply attached to a mounting member of the original irradiation apparatus for a document irradiation apparatus which is to be incorporated in advance. Just attach H, H
Although the positional relationship between the cha portion Ba and the document surface P can be automatically set, when applied to an OA device having a different mounting structure, it is necessary to change the structure of the mounting member and the like, and the predetermined relationship is required. There is a problem that it is difficult to apply to other OA equipment.

However, it is only necessary to manufacture a rare gas discharge lamp having a positional relationship between the aperture Ba and the caps H, H, which is suitable for each device. However, the manufacturing operation is complicated, and the manufacturing cost is increased. Problem arises.

Further, depending on the document irradiating apparatus, a special outer cap is mounted on and fixed to the cap of the rare gas discharge lamp, but the setting of the positional relationship between the two with respect to the aperture portion Ba is troublesome. In addition, there is a problem that the position is easily shifted.

Therefore, an object of the present invention is to relatively easily set the positional relationship between the inner cap and the outer cap disposed at the end of the envelope and the aperture portion of the light emitting layer with relatively high accuracy. It is another object of the present invention to provide a rare gas discharge lamp and a rare gas discharge lamp device having a directionality control function.

[0012]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention provides a straight tubular envelope having a light-emitting layer on the inner surface, and an outer peripheral surface of the envelope substantially over its entire length. A pair of band-shaped external electrodes made of a metal member spaced apart from each other, a harness derived from an end of the envelope and having an electrical connection with the external electrode; At the end of the envelope on the outlet side of the inner cap, a substantially cylindrical inner cap having an insulating property arranged so that the outlet portion of the harness is located inside, and the inner space of the inner cap,
A plurality of projection-like locking portions having a directional control function are formed on the outer peripheral portion of the inner cap, the protective member having a sufficient insulating property so as to cover the lead-out portion of the nest. It is characterized by.

The second invention of the present invention is characterized in that the inner surface has an aperture.
A straight tubular envelope on which a light emitting layer having a cha portion is formed, and a pair of band-shaped external electrodes made of a metal member arranged on the outer peripheral surface of the envelope over substantially the entire length thereof,
A harness that is led out from the end of the envelope and has an electrical connection relationship with the external electrode, and a harness lead-out portion is located inside the end of the harness on the lead-out side of the harness. A substantially cylindrical inner cap having insulating properties arranged so as to be located, and a protective member having excellent insulating properties so that a lead-out portion of the harness is covered in an inner space of the inner cap. A plurality of protrusion-like locking portions having a directionality regulating function are formed on the outer peripheral portion of the inner cap so as to have a predetermined positional relationship with the aperture portion.

[0014] The third invention of the present invention provides an inner surface having an aperture.
A straight tubular envelope on which a light emitting layer having a cha portion is formed, and a pair of band-shaped external electrodes made of a metal member arranged on the outer peripheral surface of the envelope over substantially the entire length thereof,
An insulating member mounted on the outer peripheral surface of the envelope so as to cover the external electrode, a terminal having an electrical connection with the external electrode, and a terminal derived from an end thereof; A harness having a connection relationship and an insulating member having an insulating property arranged such that a connecting portion between the harness and the terminal is located on an insulating member at an end of the envelope on the harness outlet side. A cylindrical inner cap; and a protective member having excellent insulation properties so that a connection portion between the harness and the terminal is buried in an inner space of the inner cap, and an outer periphery of the inner cap. A plurality of projection-shaped locking portions having a direction regulating function at a portion are formed so as to have a predetermined positional relationship with respect to an aperture portion. A protective tube made of a translucent sheet or a heat-shrinkable resin. The fifth invention is characterized in that a plurality of projection-like locking portions having different sizes are formed on an outer peripheral portion of the inner cap so as to be separated from each other. A plurality of projection-like locking portions are formed asymmetrically on the outer peripheral portion of the inner cap.

Further, a seventh invention of the present invention is directed to a straight tubular envelope having a light-emitting layer on the inner surface, and a metal arranged on the outer peripheral surface of the envelope over substantially the entire length thereof. A pair of band-shaped external electrodes made of a member, and a hand drawn out from an end of the envelope and having an electrical connection with the external electrodes.
A substantially cylindrical inner cap having an insulating property arranged at the end of the envelope on the harness outlet side such that the harness outlet portion is located inside; A plurality of projecting locking portions having a directionally regulating function on the outer peripheral portion of the inner cap, comprising a protective member having excellent insulation properties so as to cover the lead-out portion of the harness in the internal space. And a body portion having an internal space, formed with a plurality of recessed locking portions corresponding to the plurality of locking portions of the inner cap of the rare gas discharge lamp. And an outer cap corresponding to each locking portion of the inner cap.
An eighth aspect of the present invention is characterized in that the cap is mounted by locking each locking portion, and an aperture portion is formed in a light emitting layer of the rare gas discharge lamp, and an inner portion is formed.
According to a ninth aspect of the present invention, the inner space of the main body in the outer cap is formed such that each of the locking portions of the cap and the outer cap has a predetermined positional relationship with respect to the aperture. Is formed so as to substantially match the outer shape of the inner cap.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the rare gas discharge lamp according to the present invention will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a straight tubular envelope which is hermetically sealed by a glass bulb or the like, and has a light emitting layer 2 made of a phosphor such as a rare earth phosphor or a halophosphate phosphor on its inner surface. Are formed. The light emitting layer 2 does not have the light emitting layer 2 having a predetermined opening angle.
a is formed over substantially the entire length. The sealing structure of the envelope 1 is formed by sealing a disk-shaped sealing glass plate 1a at the end of a glass bulb. It can also be configured. A predetermined amount of rare gas such as xenon, krypton, neon, helium or the like which does not contain metal vapor such as mercury is sealed in the enclosed space of the envelope 1 alone or in a mixture.

A sheet structure 3 is mounted (wound) on the outer peripheral surface of the envelope 1. The sheet structure 3 is, for example, a translucent sheet having a length substantially equal to the entire length of the envelope 1.
A pair of strip-shaped external electrodes 5 and 6 made of a metal member are arranged on one surface of the
The external electrode portion extends outward from the end of
A, 6A are formed. In a state where the sheet structure 3 is mounted on the outer peripheral surface of the envelope 1, a first opening 7 is provided between one ends of the external electrodes 5 and 6, and a second opening 7 is provided between the other ends. The opening 8 is formed, and light from the light emitting layer 2 is mainly transmitted from the aperture 2a to the first opening 7.
Is released to the outside through In the sheet structure 3, an adhesive layer 9 and an adhesive layer 9a are formed on one surface of the translucent sheet 4 and the external electrodes 5, 6, and the external electrodes 5, 6 are translucent. It is adhered to the sheet 4 using an adhesive layer 9. Further, as the translucent sheet 4, for example, polyethylene terephthalate (PET) resin is preferable, and as the external electrodes 5, 6, for example, aluminum foil is preferable. However, other members can be applied.

Terminals 5A and 6A extending from the ends of the external electrodes 5 and 6 are connected to the lead portions 1 of the harness 10.
0a is electrically and mechanically connected by connecting means 11,11. Specifically, a pair of strip-shaped external electrodes 5 and 6 made of a metal member are separated from each other on one surface of a translucent sheet 4 having a length substantially equal to the entire length of the envelope 1. The terminal 5A, 6A is formed by disposing and extending the external electrode portions outward from the ends of the external electrodes 5, 6 to form terminals 5A, 6A.
The body 3 is wound around the outer peripheral surface of the envelope so that the external electrodes 5 and 6 are located between the envelope 1 and the translucent sheet 4, and the terminals of the sheet body 3 are connected. Harness 10, 5A, 6A
The ten leads 10a, 10a are electrically and mechanically connected by connecting means 11, 11 utilizing crimping.

The above-mentioned external electrodes 5, 6 and terminals 5A, 6A
Are made of the same member, for example, aluminum foil, and the thickness thereof is set in a range of approximately 10 to 100 μm. For example, when the aluminum foil is hard, its thickness is recommended to be set in the range of 10 to 50 μm, and when it is soft, its thickness is recommended to be set in the range of 30 to 100 μm. Here, the aluminum foil and its hardness and softness are generally described as follows. That is,
In Japan, a thickness range of 6 to 200 μm is defined as an aluminum foil based on JIS 4160 in Japan. The hardness and softness of the aluminum foil are classified according to the presence or absence of heat treatment, and the hardened foil is referred to as a hard foil, and the softened aluminum foil after annealing is referred to as a soft foil.

In particular, the width of the lead-out portion of the terminals 5A and 6A is
The width of each of the external electrodes 5 and 6 is smaller than that of each of the external electrodes 5 and 6.
Are connected by crimping using substantially ring-shaped connecting means 11, 11 including ends. The connection means 11, 11
Is constituted by a ring-shaped crimp terminal made of a metal member such as brass, nickel, stainless steel, etc., and the terminal 5A (or 6A) and the harness 10 are connected to the ring portion.
When the ring portions are crushed with a well-known crimping tool in a state where the lead portions 10a are overlapped, the terminals 5A and 6A of the external electrodes 5 and 6 and the lead portions 10a of the harness 10 are connected via the crimp terminals 11. Connected electrically and mechanically. The ring portion of the connection means (crimping terminal) 11 may be an endless ring having a slight gap in addition to an endless ring.

The above-mentioned terminals 5A, 6A and harnesses 10, 1
For example, the connection portion with 0 is provided as follows.
That is, at the end of the envelope 1, a substantially cylindrical inner cap 12 having an insulating property such as a resin material, a rubber material, a ceramic material, etc., is provided with the terminals 5A and 6A and the harnesses 10 and 1.
The first and second locking portions 13 and 13A having a directionality regulating function are integrally formed at symmetrical positions of the outer peripheral portion thereof so as to surround a connection portion with the first connecting portion. ing. These locking portions 13 and 13A are formed, for example, in a substantially triangular shape having an ascending gradient from one (non-envelope side) to the other (envelope side). The second locking portion 13 </ b> A is formed to be larger than the first locking portion 13.

In particular, the inner cap 12 is provided at the end of the envelope 1 with first and second locking portions 13, 13 of different sizes.
A and the aperture portion 2a are mounted so as to have a predetermined positional relationship (in the illustrated example, the center of the aperture portion 2a is positioned substantially perpendicular to the plane including the locking portions 13 and 13A). Is done. The inner space of the inner cap 12 is filled with a protective member 14 having an excellent insulating property such as a thermosetting resin such as a silicone resin or a rubber-based member.
As the protective member 14, in the state after curing, J
A durometer D hardness of 8 based on ISK 7515-1986 "Testing method of durometer hardness of plastic"
A value set to 0 or less, preferably in the range of 80 to 30, is recommended. The inner cap 12 is preferably made of a resin material having some flexibility or elasticity. For example, polycarbonate and polybutylene terephthalate (PBT) resins are recommended.

Next, a method of manufacturing the rare gas discharge lamp DL will be described with reference to FIGS. First, FIG.
As shown in (a) and (b), for example, external electrodes 5 and 6 having an adhesive layer 9a on one surface are connected to terminals 5A and 6A on a translucent sheet 4 having an adhesive layer 9 on one surface. The sheet structure 3 is manufactured by overlapping and bonding so as to protrude from the end of the translucent sheet 4. Next, the envelope 1 is sealed.
At one end 4a of the translucent sheet 4 in the structure 3;
By relatively rolling toward the other end 4b, the outer peripheral surface of the envelope 1 is covered with the sheet structure 3, the translucent sheet 4 is covered with the external electrodes 5, 6, and the terminal is provided. 5A and 6A are wound so as to be exposed, and one end 4a of the translucent sheet 4 is overlapped with the other end 4b and adhered by an adhesive layer 9 (see FIG. 3).

Next, as shown in FIG. 5, a crimp terminal (connection means) 11 and a harness 10 are located at the tip of the terminal 5A (6A) extending on the end face side of the envelope 1. .
Then, the terminal 5A is inserted into the ring portion of the crimp terminal 11, and the lead portion 10a of the harness 10 is inserted into the ring portion so as to overlap the terminal 5A. In this state, the terminal 5A and the lead portion 10a of the harness 10 are electrically and mechanically connected by crimping the crimp terminal 11 using a well-known crimping tool (not shown). FIG.
See). Next, as shown in FIG. 6, the inner cap 12 is located on the end side of the envelope 1 and
The harnesses 10, 10 are inserted into the cap 12 from the envelope side and led out from the end on the non-envelope side. In this state, the inner cap 12 is attached to the end of the envelope 1.
A connection portion between the terminal 5A and the lead portion 10a of the harness 10 is located inside, and the first and second locking portions 13, 13A are provided.
1 to 3 by filling and hardening the protection member 14 therein so that the center of the aperture portion 2a is positioned substantially perpendicular to the surface including The gas discharge lamp DL is completed.

When the rare gas discharge lamp DL is applied to an OA device (for example, an original irradiating device), it depends on the structure of the other original irradiating device. And outer cap 15
Is mounted as shown in FIGS. 7 to 9, for example, or is mounted on an outer cap 15 or a mounting body similar thereto, which is arranged in the document irradiation apparatus. In particular, since the former mode is preferable, the mounting example of the former mode will be described with reference to FIGS.

The outer cap 15 is, for example, shown in FIG.
As shown in FIG. 3, a substantially cylindrical main body 16 having an internal space 16a, and
First and second concave portions (for example, holes) of different sizes formed so as to correspond to projecting first and second locking portions 13 and 13A of cap 12 having different sizes. 17,
17A, and locking grooves 18 formed in the longitudinal direction of the outer peripheral portion of the main body 16.
An injection hole 16b of a fixing member such as hot melt is formed on the non-opening side, and a harness outlet hole 16c communicating with the internal space 16a is formed between the locking grooves 18 of the main body 16. I have. The inner space 16 a of the main body 16 in the outer cap 15 is configured to substantially match the outer shape of the inner cap 12. And
The outer cap 15 is connected to the inner cap 12 of the rare gas discharge lamp DL by connecting the harnesses 10 and 10 to an outlet hole 16c.
The first locking portion 13 is connected to the first locking portion 17 and the second locking portion 13A is connected to the second locking portion 17
A is mounted so as to be inserted and locked in A respectively. This completes the mounting of the outer cap 15 to the inner cap 12 as shown in FIGS. still,
In this state, the injection hole 16 of the outer cap 15 is
By injecting a fixing member from b into a space existing between the inner cap 12 and the outer cap 15, both the caps and the harness can be fixed.

As described above, the mounting of the outer cap 15 to the inner cap 12 is performed by the first and second locking portions 17 and 17A of the outer cap 15 and the inner cap 12.
When the first and second locking portions 13 and 13A are in a corresponding positional relationship, they can be securely mounted as described above. However, for example, as shown in FIG. 180 ° of the first and second locking portions 13 and 13A
It cannot be mounted in the inverted state. That is, since the second locking portion 17A of the outer cap 15 has a larger shape than the first locking portion 13 of the inner cap 12, both are engaged with each other, but the second locking portion 17A of the outer cap 15 is The first locking portion 17 is the second locking portion of the inner cap 12.
Since they have a smaller form than the locking portion 13A, they are not engaged. Therefore, the mounting of the outer cap 15 (the inner cap 12) on the inner cap 12 (the outer cap 15) is provided with a directional control function that the outer cap 15 can be mounted only in a specific direction.
The direction of the aperture portion 2a of L can be regulated to be constant.

The rare gas discharge lamp device configured as described above is applied to, for example, a document irradiation device as shown in FIG. That is, in the rare gas discharge lamp device, a pair of L-shaped locking claws erected on the mounting member of the document irradiating device are inserted and locked into the locking grooves 18 of the outer cap 15. Attached to. In this mounting state, the optical axis of the rare gas discharge lamp is automatically set so as to face the predetermined document surface P. Accordingly, the light emitted from the aperture portion 2a of the rare gas discharge lamp is irradiated on a predetermined document surface P, and the reflected light on the document surface P is surely incident on the line sensor S, so that a predetermined reading can be performed. Done.

According to this embodiment, the inner cap 12 is provided at the end of the envelope 1, and the first and second locking portions 13, 1 are provided.
Since the 3A and the aperture 2a are mounted so as to have a predetermined positional relationship, for example, when incorporated in a document irradiating device or the like, the first and second locking portions 13, 13A are attached to the mounting member thereof. The light emitted from the aperture section 2a is automatically applied to a desired document surface P without requiring a special assembling operation. Therefore, the original can be read with high accuracy.

In the case where the outer cap 15 is used for assembling in a document irradiating device or the like, the main body 1 is used.
6, first and second locking portions 13, 13
A, the first and second locking portions 17, 17A having a concave shape corresponding to A
Is formed, the outer cap 15 is fixed to the inner cap 12 by the locking portions 13, 13A and the locking portions 17,
17A is attached so as to be locked, so that both can be easily and surely connected, and since the locking portions 13, 13A have a predetermined positional relationship with respect to the aperture portion 2a, the inner cap The locking grooves 18, 18 of the outer cap 15 connected to the outer ring 12 also have a predetermined positional relationship with the aperture portion 2a. Therefore, the outer cap 1 of the rare gas discharge lamp device is attached to the attachment member of the document irradiation device.
5, the optical axis of the rare gas discharge lamp can be adjusted, and the incorporation can be improved.

In particular, the first and second inner caps 12
Are configured so that their shapes (sizes) are different from each other, and the sizes of the first and second locking portions 17, 17A of the outer cap 15 are also the first and second. The first locking portion 13 of the inner cap 12 and the first locking portion 17 of the outer cap 15 are formed so as to correspond to the second locking portions 13 and 13A. Only when the locking portion 13A and the second locking portion 17A are in a corresponding positional relationship, the inner cap 12 (outer cap 12) of the outer cap 15 (inner cap 12).
Mounting on the cap 15) becomes possible, and mounting in other positional relations becomes impossible. Therefore, if both are put in the attached state by the provision of such a direction restriction function,
Inevitably, the optical axis of the rare gas discharge lamp can be set to a desired document surface P.

The inner space 16 of the outer cap 15
a is configured so as to substantially match the outer shape of the inner cap 12, and furthermore, projection-shaped locking portions 13, 13A are formed.
Are formed in a substantially triangular shape, when the outer cap 15 is mounted on the inner cap 12, the clearance between the two caps is small, and the rear portions of the locking portions 13 and 13A (triangular rising portions) are formed. The rising edge of the clawed portion) is locked to the side of the hole of the locking portion 17, 17A. Therefore, the connection relationship between the two caps becomes strong,
The predetermined positional relationship of the outer cap 15 with respect to the aperture portion 2a does not collapse during use, and stable reading quality can be expected when applied to a document irradiating apparatus.

The direction of the optical axis of the aperture 2a of the rare gas discharge lamp is aligned with the locking portions 17, 17A of the outer cap 15 which is locked by the locking portions 13, 13A of the inner cap 12.
Can be arbitrarily set depending on the position of the optical device. Therefore, no matter how the optical axis of the built-in device is set, it is easy to simply change the formation position of the locking portions 17 and 17A on the outer cap 15. It can respond and can be incorporated.

In particular, the harness 10 is led out in such a manner that the inner cap 12 is attached to the end of the envelope 1 so that one end thereof is fitted to the envelope 1. No gap is formed except for the opening on the side. For this,
Leakage of the protection member 14 filled from the opening from the inner cap 12 can be eliminated, and a cavity can be prevented from being formed inside the protection member 14 filled. Therefore, the coupling strength between the protection member 14 and the end face portion of the envelope 1 can be improved, and the occurrence of dielectric breakdown between terminals due to the cavity can be suppressed. In addition, since a cavity is not easily formed, even if an external force (for example, a tensile force) acts on the harness 10, the connection between the harness 10 and the terminals 5A and 6A is surely formed by the protective member 14. As a result, disconnection, disconnection of terminals and the like can be suppressed.

An inner part mounted on the end of the envelope 1
Only the opening exists at the other end of the cap 12 (on the side of the non-enclosure), and since the harness 10 is led out of the opening, the harness 10 extends to the internal space of the inner cap 12. Can be performed in a state where the envelope 1 is supported almost upright so that the opening at the other end of the inner cap 12 faces upward. Therefore, the protection member 1
In addition to simplifying the operation of filling the inner cap 12 with the protective member 14, the filling and filling of the inner cap 12 with the protective member 14 simultaneously support and insulate and protect the connection between the harness 10 and the terminals 5A and 6A. And work efficiency can be improved.

Further, the durometer D of the protection member 14 is used.
If the hardness is set to 80 or less, preferably in the range of 80 to 30, an undesired stress acts on the contact interface between the glass bulb constituting the envelope 1 and the protective member 14 during production and use. Even if it does, a considerable part is protection member 1
Absorbed in 4. Therefore, silicon-
When a thermosetting resin such as a thermosetting resin is used, even if an undesired stress acts on the contact interface with the envelope end face during the thermosetting, the stress is absorbed by the protective member 14,
Also, even if an undesired stress is applied in the case of operating in a mode in which a large temperature difference is generated during use, since the protection member 14 absorbs the undesired stress, the crack damage generated on the end face of the envelope can be prevented. A high quality product can be obtained.

FIG. 12 shows a second embodiment of the present invention. The basic configuration is almost the same as that of the first embodiment. The difference is that the first and second locking portions 13 having substantially the same shape are formed on the outer peripheral portion of the inner cap 12A.
a and 13b are integrally formed by shifting one of the locking portions appropriately in the axial direction from the symmetrical position, and are substantially identical to the locking portions 13a and 13b on the main body 16 of the outer cap 15A. The first and second locking portions 17a and 17b in the form of recesses (holes) are formed.

As shown in FIG. 3A, the first locking portion 17a of the outer cap 15A and the inner cap 12
The first locking portion 13a of A is securely locked to each other when the second locking portion 17b and the second locking portion 13b are in a corresponding positional relationship. However, as shown in FIG. 3B, the rare gas discharge lamp DL is reversed and the inner cap 15A of the outer cap 15A is inserted into the first locking portion 17a.
When the second locking portion 13b of the cap 12A is positioned so that the first locking portion 13a faces the second locking portion 17b, the locking position of each locking portion is positioned in the axial direction. Due to the misalignment, the connection between the outer cap 15A and the inner cap 12A becomes impossible.

According to this embodiment, the same effects as in the first embodiment can be expected for the rare gas discharge lamp and the rare gas discharge lamp device. In particular, if the inner diameter of the outer cap 15A and the outer diameter of the inner cap 12A are set to be substantially the same, the outer cap 15A can be connected to the inner cap 12A.
In the state where they are attached to each other, they are almost in close contact with each other,
The backlash between the two can be prevented, and the displacement of the optical axis and the like can be reliably prevented.

FIG. 13 shows a third embodiment of the present invention. The basic configuration is almost the same as that of the first embodiment. The difference is that a substantially triangular first locking portion 13 and a dowel-shaped (column-shaped) second locking portion 13 are provided on the outer peripheral portion of the inner cap 12B.
And one of the locking portions 13B is integrally formed by appropriately shifting one of the locking portions in the axial direction from the symmetrical position.
A hole-shaped (recessed) first locking portion 17 and a slit-shaped (recessed) second locking portion 1 are formed in the main body 16 of the cap 15B.
7B is formed so as to correspond to the first and second locking portions 13 and 13B. The second locking portion 17B is formed to open at the opening end of the outer cap 15B.

As shown in FIG. 3A, the first locking portion 17 of the outer cap 15B and the inner cap 12B
When the first locking portion 13 has a positional relationship between the second locking portion 17B and the second locking portion 13B, as shown in FIG. Are securely locked to the corresponding locking portions. However, as shown in FIG. 3C, the rare gas discharge lamp DL is reversed and the inner cap 1 is attached to the first locking portion 17 of the outer cap 15B.
When the second locking portion 13B of 2B is positioned so that the first locking portion 13 is opposed to the second locking portion 17B, when the outer cap 15B is mounted on the inner cap 12B. The dowel-shaped second locking portion 13B is the outer cap 1.
The outer cap 15B and the inner cap 12B cannot be connected to each other because the outer cap 15B comes into contact with the opening edge of the main body 16 of the 5B and acts as a stopper. still,
The formation position of the dowel-shaped second locking portion 13B can be set arbitrarily. For example, when the dowel-shaped second locking portion 13B is formed on the end face side, the slit-shaped second locking portion 17B of the outer cap 15B is elongated.

FIG. 14 shows a fourth embodiment of the present invention. The basic configuration is almost the same as that of the first embodiment. The difference is that a substantially triangular first locking portion 13 and a dowel-shaped second locking portion 13B are provided on the outer peripheral portion of the inner cap 12C at an adjacent position and one of the locking portions is appropriately adjusted. It is formed integrally with the main body 16 of the outer cap 15C while being shifted in the axial direction, and a first locking portion 17 having a hole shape and a second locking portion 17B having a slit shape are formed on the main body portion 16 of the outer cap 15C. It is formed so as to correspond to the locking portions 13 and 13B.
The second locking portion 17B is formed to open at the opening end of the outer cap 15C.

According to this embodiment, the outer cap 1
5C and the inner cap 12C have a second locking portion (slit) 13B inserted into a second locking portion (slit) 17B.
At the same time as being locked, the first locking portion (projection) 13 is inserted and locked into the first locking portion (hole) 17 to be securely connected. However, when the positions of the corresponding locking portions are different from each other, the second locking portion 13B comes into contact with the opening edge of the outer cap 15C and exhibits a stopper-like operation. The first locking portion 17 and the first locking portion 13 cannot be locked. Therefore, it is impossible to combine the two, and the direction of the aperture of the rare gas discharge lamp DL in the mounted state can always be set to the normal state.

FIG. 15 shows a fifth embodiment of the present invention. The basic configuration is almost the same as that of the first embodiment. The difference is that after the external electrodes 5 and 6 configured as shown in FIG. 6B are attached to the outer peripheral surface of the envelope 1 shown in FIG. A translucent sheet 4A such as a PET resin having an adhesive layer on one surface is wound and adhered to the outer peripheral surface of the envelope 1 so as to cover the external electrodes 5 and 6.

According to this embodiment, as compared with the above-described embodiments, although the mechanization and the work efficiency are inferior, the electrical connection between the harness and the external electrodes 5 and 6 is equivalently improved. The effect can be expected. In particular, if a light-transmitting insulating film such as a silicone varnish is formed on the outer peripheral surface of the envelope 1 before winding the light-transmitting sheet 4A, the dielectric strength between the external electrodes is improved. it can.

FIG. 16 shows a sixth embodiment of the present invention, and the basic configuration is almost the same as that of the fifth embodiment. The difference is that the outer electrodes 5 and 6 configured as shown in FIG. 15B are attached to the outer peripheral surface of the envelope 1 using an adhesive layer (not shown), and then the outer peripheral surface of the envelope 1 is attached. A protective tube 20 made of a heat-shrinkable resin such as PET resin is attached so that the external electrodes 5 and 6 are covered, and heat-shrinks. After the protective tube 20 is mounted on the envelope 1, it is heated to, for example, about 150 to 200 ° C. and contracted, so that it is brought into close contact with the outer peripheral surface of the envelope 1.

According to this embodiment, if a light-transmitting insulating film such as a silicone varnish is formed on the outer peripheral surface of the envelope 1 before the protection tube 20 is mounted, the distance between the external electrodes can be reduced. Can improve dielectric strength. In addition, since there is no overlapping portion by winding as in the case of a translucent sheet, peeling of the overlapping portion can be eliminated.

The rare gas discharge lamps of the first to fifth embodiments are further provided with a heat-shrinkable protective tube 2.
By coating with 0, a higher quality product can be provided even when the application conditions of the rare gas discharge lamp are strict, such as severe environmental conditions and high safety standards.

The present invention is not limited to the above embodiment. For example, the electrical connection between the harness and the external electrode is made by a connection means using a crimping terminal or the like. Connection means such as an adhesive, welding, and soldering can also be applied. In addition, the terminal having an electrical connection with the external electrode may be located in a bent state inside the protective member, or may be disposed so as to be located substantially on the extension of the external electrode. In addition, the number of locking portions of the inner cap and the outer cap may be two or three or more, and the position of the locking portion of the outer cap may be the inner portion.
The outer cap can be arbitrarily changed in relation to the built-in equipment, and can be appropriately changed according to the formation position of the locking portion of the cap. Further, in the form of the external electrode, the term “strip” means that the whole form is a strip, and it is needless to say that the external electrode has a deformed portion such as a triangular, semicircular or rectangular shape at the end. This includes a hole or the like in a portion other than the end portion, a stitch-like shape, and the like.

[0050]

As described above, according to the present invention, the inner cap is provided at the end of the envelope so that the plurality of projecting locking portions and the aperture have a predetermined positional relationship. For example, when incorporated in a document irradiating device or the like, the light emitted from the aperture unit can be subjected to a special assembling operation by attaching to a mounting member thereof using a plurality of locking portions. It is possible to automatically irradiate a desired original surface without need. Therefore, the original can be read with high accuracy.

When the outer cap is used when incorporated in a document irradiating device or the like, a concave locking portion corresponding to a plurality of projection locking portions is formed on the outer peripheral portion of the outer cap. Therefore, by mounting the inner cap and the outer cap such that the corresponding locking portions are locked, the two can be easily and reliably coupled with each other.
Since the locking portion has a predetermined positional relationship with respect to the aperture portion, the outer cap coupled to the inner cap also has a predetermined positional relationship with respect to the aperture portion. Therefore, the optical axis of the rare gas discharge lamp can be adjusted only by attaching the outer cap of the rare gas discharge lamp device to the mounting member of the document irradiating device, and the incorporation can be improved.

In particular, since the plurality of locking portions of the inner cap are configured to have different shapes (sizes) from each other, or are arranged at asymmetric positions to provide a directionality control function, Only when the respective locking portions of the outer cap and the inner cap are in the corresponding positional relationship, the connection between the outer cap and the inner cap is possible, and otherwise the connection is impossible.
Therefore, if both are brought into a proper mounting state by providing such a directionality control function, the optical axis of the rare gas discharge lamp can be inevitably set to the desired document surface P.

Further, since the inner space of the outer cap is configured to substantially match the outer shape of the inner cap, the clearance between the two caps when the outer cap is mounted on the inner cap is reduced. The outer cap is not detached from the inner cap during use, and the predetermined positional relationship with the aperture is not broken. When applied to an apparatus, stable reading quality can be expected.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a first embodiment of a rare gas discharge lamp according to the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a U-U sectional view of FIG. 1;

FIG. 4 is a view showing a sheet structure according to the present invention;
5A is a plan view showing a developed state, and FIG. 5B is a cross-sectional view taken along line V-V of FIG.

FIG. 5 is a cross-sectional view showing a disassembled state of the terminal and the harness according to the present invention before connection by the connection means.

FIG. 6 is a side sectional view showing a state in which an inner cap is attached to an end of an envelope.

FIG. 7 is a side sectional view of a main part of the rare gas discharge lamp device, showing a state in which an outer cap is attached to an inner cap.

FIG. 8 is a transverse sectional view of FIG. 7;

FIG. 9 is a perspective view of an outer cap according to the present invention.

FIG. 10 is a perspective view of the inner cap shown in FIG.
FIG. 5 is a partial cross-sectional view showing a state where the inner cap is inverted when the cap is attached.

11 is a cross-sectional view showing an example in which the rare gas discharge lamp device shown in FIG. 7 is applied to a document irradiation device.

FIG. 12 is a view showing a second embodiment according to the present invention, and FIG. 12 (a) is a partial cross-sectional view showing a normal state in which respective locking portions have a positional relationship corresponding to each other; Figure (b)
FIG. 4 is a partial cross-sectional view showing a state where the respective locking portions are not in a corresponding positional relationship.

FIG. 13 is a view showing a third embodiment according to the present invention, and FIG. 13 (a) is a partial cross-sectional view showing a normal state in which respective locking portions have a positional relationship corresponding to each other; Figure (b)
FIG. 3 is a partial cross-sectional view showing a mounted state, and FIG. 4C is a partial cross-sectional view showing a state where the respective locking portions cannot be mounted because there is no corresponding positional relationship.

FIG. 14 is a perspective view showing a state before mounting according to a fourth embodiment of the present invention.

FIG. 15 is a view showing a fifth embodiment according to the present invention, wherein FIG. 15 (a) is a longitudinal sectional view, and FIG. 15 (b) is FIG.
The top view of the external electrode shown in FIG.

FIG. 16 is a longitudinal sectional view showing a sixth embodiment according to the present invention.

FIG. 17 is a partially cutaway side view of a conventional rare gas discharge lamp.

FIG. 18 is a sectional view taken along line XX of FIG. 17;

19 is a cross-sectional view showing an example in which the rare gas discharge lamp shown in FIG. 17 is applied to a document irradiation device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 envelope 2 light emitting layer 2 a aperture portion 3 sheet structure 4, 4A translucent sheet 5, 6 external electrode 5A, 6A terminal 7 first opening 8 second opening 9, 9a Adhesive layer 10 Harness 10a Lead portion 11 Connecting means 12, 12A, 12B, 12C Inner cap 13, 13A, 13B, 13a, 13b Locking portion 14 Protective member 15, 15A, 15B, 15C Outer cap 16 Main unit 16a Internal space 17, 17A, 17B, 17a, 17b Locking unit 20 Protection tube DL Rare gas discharge lamp

Claims (9)

[Claims] 1. A pair of band-shaped external electrodes formed of a straight tubular envelope having a light-emitting layer on the inner surface and metal members arranged on the outer peripheral surface of the envelope over substantially the entire length thereof. And a harness derived from the end of the envelope and having an electrical connection relationship with the external electrode, and a harness leading portion at an end of the envelope on the harness leading side. A substantially cylindrical inner cap having an insulating property disposed so as to be positioned inside, and a protective member having excellent insulation properties such that an inner space of the inner cap is covered with a lead-out portion of a harness. And a plurality of projection-shaped locking portions having a directionality control function formed on an outer peripheral portion of the inner cap. 2. A straight tubular envelope having a light-emitting layer having an aperture on its inner surface, and a metal member arranged on the outer peripheral surface of the envelope over substantially the entire length thereof. A pair of band-shaped external electrodes, a harness derived from an end of the envelope and having an electrical connection with the external electrode, and an end of the envelope on the harness lead-out side. A substantially cylindrical inner cap having an insulating property in which the lead-out portion of the harness is located inside, and the inner space of the inner cap is enriched so that the lead-out portion of the harness is covered. A protective member having excellent insulation properties;
A rare gas discharge lamp characterized in that a plurality of projection-shaped locking portions having a directionality regulating function are formed on an outer peripheral portion of a cap so as to have a predetermined positional relationship with an aperture portion. 3. A straight tubular envelope having a light-emitting layer having an aperture on its inner surface, and a metal member arranged on the outer peripheral surface of the envelope over substantially the entire length thereof. A pair of band-shaped external electrodes, an insulating member mounted on the outer peripheral surface of the envelope so as to cover the external electrodes, and having an electrical connection relationship with the external electrodes, and derived from an end thereof. And a harness having an electrical connection with the terminal,
A substantially cylindrical inner cap having insulating properties disposed on an insulating member at an end of the envelope on the harness outlet side so that a connection portion between the harness and the terminal is located inside; A protrusion having a solid and excellent insulating member so that a connection portion between a harness and a terminal is buried in an inner space of the cap, and a projection having a direction control function on an outer peripheral portion of the inner cap; A rare gas discharge lamp characterized in that a plurality of locking portions having a shape are formed so as to have a predetermined positional relationship with respect to an aperture portion. 4. The rare gas discharge lamp according to claim 3, wherein the insulating member is formed of a protective tube made of a translucent sheet or a heat-shrinkable resin. 5. The rare gas according to claim 1, wherein a plurality of protrusions having different sizes are formed on an outer peripheral portion of the inner cap so as to be separated from each other. Discharge lamp. 6. The rare gas discharge lamp according to claim 1, wherein a plurality of projection-like locking portions are formed asymmetrically on an outer peripheral portion of the inner cap. 7. A pair of strip-shaped external electrodes made of a straight tubular envelope having a light-emitting layer on the inner surface and metal members arranged on the outer peripheral surface of the envelope over substantially the entire length thereof. And a harness derived from the end of the envelope and having an electrical connection relationship with the external electrode, and a harness leading portion at an end of the envelope on the harness leading side. A substantially cylindrical inner cap having an insulating property disposed so as to be positioned inside, and a protective member having excellent insulation properties such that an inner space of the inner cap is covered with a lead-out portion of a harness. A rare gas discharge lamp in which a plurality of projection-shaped locking portions having a direction control function are formed on the outer peripheral portion of the inner cap; and a main body having an internal space, the inner portion of the rare gas discharge lamp. -Forming a plurality of recessed locking portions corresponding to the plurality of locking portions of the cap; An outer cap having insulating properties, wherein the outer cap is provided on the inner cap of the rare gas discharge lamp, and the respective locking portions of the outer cap corresponding to the respective locking portions of the inner cap. A rare gas discharge lamp device which is mounted by being locked. 8. An aperture portion is formed in a light emitting layer of the rare gas discharge lamp, and respective locking portions of an inner cap and an outer cap have a predetermined positional relationship with respect to the aperture portion. The rare gas discharge lamp device according to claim 7, wherein the rare gas discharge lamp device is formed as described above. 9. The rare gas discharge lamp device according to claim 7, wherein the inner space of the main body in the outer cap is formed so as to substantially conform to the outer shape of the inner cap.