JP4113471B2 - Low pressure mercury lamp and assembly method - Google Patents

Description

  The present invention relates to a low-pressure mercury lamp including a holding member that holds the arc tube in a state where at least one end of the arc tube is received from a receiving port, and a method for assembling the low-pressure mercury lamp.

  In the energy saving era, development of low-pressure mercury lamps is underway. In particular, fluorescent lamps as a light source that replaces incandescent bulbs, among them, bulb-type fluorescent lamps with high lamp efficiency and long life are attracting attention. For example, this bulb-type fluorescent lamp includes an arc tube formed in a double spiral shape that rises vertically from an end portion and then turns around a turning axis (for example, Patent Document 1).

  This light bulb-type fluorescent lamp has a longer overall length than that of an incandescent bulb, and there is a problem that when a bulb-type fluorescent lamp is attached to an existing lamp using an incandescent bulb, a part of the lamp will protrude from the lamp. Therefore, the present inventors reduced the overall length of the bulb-type fluorescent lamp by turning the portion near the end of the arc tube vertically around the turning axis and turning it into a spiral shape. As a result, the bulb-type fluorescent lamp was miniaturized to approximately the same size as the incandescent bulb.

  FIG. 16 is a view showing a holding member that holds the arc tube whose end portion is curved in a spiral shape. As shown in the figure, the holding member 906 has a bottomed cylindrical shape, and has a pair of receiving ports 963 and 964 for receiving both ends of the arc tube in the bottom wall 961. Both ends of the arc tube inserted from the receiving ports 963 and 964 are fixed to the inside of the holding member 906 with an adhesive to hold the arc tube.

  However, in the light bulb-type fluorescent lamp using the above-mentioned arc tube in which the end portion is spiral, the entire length thereof can be shortened to approximately the same size as the incandescent bulb, but the pair of end portions of the arc tube are held by the holding member 906. There is a problem that it is very difficult to insert into the receiving ports 963 and 964. That is, since the receiving ports 963 and 964 formed in the holding member 906 are opposite to each other, when one end portion of the arc tube is inserted into the receiving port 963, the other end portion is detached from the receiving port 964, It is difficult to insert both ends into the receiving ports 963 and 964.

If the receiving ports 963 and 964 are enlarged, both ends of the arc tube can be inserted into the receiving ports 963 and 964 relatively easily. However, when each end is fixed in the holding member 906 with an adhesive, There is a problem in that the adhesive flows out of the receiving ports 963 and 964 to the outside and the appearance looks very bad.
Japanese Patent Laid-Open No. 9-17378

  The present invention has been made in view of the above-described problems. For example, a low-pressure mercury lamp that can easily receive the end of the arc tube in the holding member without increasing the size of the receiving port, and An object of the present invention is to provide a method for assembling the low-pressure mercury lamp.

In order to achieve the above object, a low-pressure mercury lamp according to the present invention is a low-pressure mercury lamp comprising a holding member that holds the arc tube in a state where at least one end of the arc tube is received from a receiving port. A pair of lead wires for electrodes are led out from at least one end of the arc tube, and the portion close to the end is swung around the swivel axis to the end, and the receiving port is as viewed from the pivot axis direction is formed so as to open, the retaining member, during assembly of the arc tube, when rotating the arc tube to said pivot axis around said receiving said at least one end A guide restricting portion for restricting guidance to the entrance is provided , and the lead wire is received from the opening . According to this configuration, when the arc tube is rotated around the turning axis in a state in which the portion near the end of the arc tube is in contact with the guide restricting portion, the end of the arc tube can be easily moved from the inlet of the holding member. Accepted.

  In particular, the guide restricting portion is characterized in that the at least one end portion portion is formed in a groove shape along the direction of turning around the turning axis. For this reason, the portion near the end of the arc tube is guided to the receiving port of the holding member in a stable state without breaking the attitude of the arc tube.

  Further, a pair of lead wires for electrodes are led out from at least one end of the arc tube, and the receiving port is formed to open as viewed from the pivot axis direction, and the holding member is The lead is received from the opening. In particular, the opening is formed by tilting the receiving port at an angle in the range of 20 ° to 60 ° with respect to the pivot axis direction. It is characterized by having. According to this configuration, for example, before assembling the arc tube to the holding member, if the lead wire is in a state parallel to the pivot axis direction of the arc tube and the arc tube is brought close to the support member from the pivot axis direction, Is easily received from the receiving port into the holding member.

  In addition, the holding member includes a cover portion that covers at least one end portion of the arc tube that is received continuously to the outer peripheral edge of the receiving port, and the opening includes the cover portion and / or the guide portion. It is formed by the notch part formed in this. According to this configuration, for example, before assembling the arc tube to the holding member, if the lead wire is in a state parallel to the pivot axis direction of the arc tube and the arc tube is brought close to the support member from the pivot axis direction, Is easily received from the notch into the holding member.

  On the other hand, the at least one end portion is fixed in the holding member via an adhesive, and the guide restricting portion is the at least one end portion received in the holding member. The holding member has one or more injection holes for injecting the adhesive between the adjacent portions, or the holding member has a prevention wall for preventing the adhesive from flowing out. It is characterized by that. Thereby, the arc tube is firmly and reliably held by the holding member.

  Further, the holding member has a holding portion for holding the pair of lead wires at a distance from each other. For this reason, the lead wires are held at intervals, and, for example, the lead wires are less likely to cross or get entangled.

  In addition, the arc tube is formed in a double spiral shape which is folded back at a substantially center of the glass tube and both sides of the folded portion are swung around a swivel axis. According to this configuration, the total length of the arc tube can be shortened as compared to the portion near the end of the arc tube that is parallel to the pivot axis.

An assembling method according to the present invention includes: an arc tube in which a lead wire for an electrode is led out from at least one end, and a portion near the end turns around a turning axis; and guide regulation of the at least one end A low-pressure mercury lamp assembly method comprising: a holding member that receives and holds from a receiving port along a portion, wherein the receiving port of the holding member opens from an end of the arc tube when viewed from the swivel axis direction. and are the assembled to the holding member at least one end of the arc tube, wherein the step of abutting the guide portion of the peripheral surface and the holding member at least one end portion near the person A step of rotating the arc tube relative to the receiving port relative to the swivel axis while being in contact with each other, and a peripheral surface near one end of the arc tube, a guide portion of the holding member, The contact of the lead wire Performed in parallel with the serial pivot axis is characterized in Rukoto. For this reason, the arc tube can be easily assembled to the holding member, and the arc tube can be received in the holding member if the peripheral surface near the end of the arc tube is brought into contact with the guide restricting portion and rotated. Therefore, this process can be automated.

  In addition, an electrode lead wire is led out from the end of the arc tube, and the receiving port of the holding member is open as viewed from the direction of the pivot axis, and is close to one end of the arc tube. The contact between the peripheral surface of the portion and the guide portion of the holding member is performed in a state where the lead wire is parallel to the turning axis direction. According to this configuration, when the arc tube and the holding member are brought into contact with each other in a state in which the leading end of the lead wire and the receiving port are substantially coincident with each other in the pivot axis direction, the lead wire can be easily received in the support member. it can.

  The low-pressure mercury lamp according to the present invention includes a holding member that holds the arc tube in a state where at least one end of the arc tube is received from the receiving port, and the portion near the end of the arc tube is The holding member is swung around the swiveling axis to the end, and when the arc tube is assembled, when the arc tube is rotated around the swivel axis, the holding member moves the at least one end to the end. Since the guide restricting portion for restricting the guide to the receiving port is provided, when the arc tube is rotated around the turning axis in a state where the end portion of the arc tube is in contact with the guide restricting portion, the arc tube is attached to the holding member. Easy assembly. Further, if the end portion of the arc tube is brought into contact with the guide portion and rotated, the arc tube is received in the holding member, so that this process can be automated.

  According to the method of assembling the low-pressure mercury lamp according to the present invention, the arc tube whose at least one end portion turns around the turning axis, and the at least one end from the receiving port along the guide restricting portion. An assembly method of a low-pressure mercury lamp comprising a holding member that receives and holds, the assembly of at least one end of the arc tube to the holding member includes a peripheral surface of a portion closer to the at least one end The arc tube is made through a step of contacting the guide restricting portion of the holding member and a step of rotating the arc tube relative to the receiving port relative to the receiving shaft in the abutted state. Can be easily assembled to the holding member. Further, if the peripheral surface near the end of the arc tube is brought into contact with the guide portion and rotated, the arc tube is received in the holding member, and this process can be automated.

Hereinafter, embodiments in which the present invention is applied to a bulb-type fluorescent lamp which is a low-pressure mercury lamp will be described with reference to the drawings.
<First Embodiment>
1. 1. Configuration of Light Bulb-Type Fluorescent Lamp (1) Overall Configuration FIG. 1 is a front view showing an overall structure in which substantially half of the bulb-type fluorescent lamp according to the first embodiment is cut away. This bulb-type fluorescent lamp 1 is a 12 W type that is an alternative to the incandescent bulb 60 W. The incandescent bulb for 60W has a maximum outer diameter of 60 mm and a total length of 110 mm.

  As shown in the figure, the bulb-type fluorescent lamp 1 includes a double spiral arc tube 2, an electronic ballast 3 for lighting the arc tube 2, an electronic ballast 3, and a base 5. The case 4 is provided.

  FIG. 2 is a front view showing a structure in which a part of the arc tube is cut out.

  As shown in FIGS. 1 and 2, the arc tube 2 uses a curved glass tube 9. The glass tube 9 is folded back at a substantially center folding portion 91, and the portion from the folding portion 91 to the end portions 92 and 93 pivots around the turning axis A. The direction of turning around the turning axis A from the folded portion 91 of the glass tube 9 toward the end portions 92 and 93 is hereinafter referred to as “turning direction”.

  In addition, the glass tube between the folding | returning part 91 and the front part of each edge part 92,93 when it moves to each edge part 92,93 along the turning direction from the folding | turning part 91 is with respect to the turning axis A. The angle α (hereinafter, this angle is referred to as a “spiral angle”, which is 75 ° in the present embodiment) is turned while tilting, and the front portion of the end portions 92 and 93 and the end portions 92 and 93 are rotated. (Hereinafter, the glass tube in between is referred to as “the portion near the end of the glass tube”) has a helical angle β (about 68 ° in this embodiment) with respect to the pivot axis A. ) Turning while tilting. In the embodiment, the portion closer to the end portion is a range from the end portion of the glass tube to the position returning to the turn-back portion 91 side by about ¼ turn when viewed in plan.

  In this way, the turning angle at the portion near the end of the glass tube is changed because the portion near the end of the glass tube 9 and the direction near the end are parallel to the turning axis A (this direction, Hereinafter, it is simply referred to as “swivel axis direction”) to increase the distance from the glass tube 9 adjacent to the glass tube 9 so that the arc tube can be easily attached to a holder described later.

  This glass tube 9 has a tube inner diameter of 7.4 mm and a tube outer diameter of 9.0 mm, and the gap between the glass tubes adjacent in the swivel axis direction in the portion excluding the portion near the end of the glass tube 9 is about 1 mm. The gap between the end portions 92 and 93 and the glass tube adjacent to the end portion is about 6 mm at the maximum. Further, when the folded portion 91 to the both end portions 92 and 93 in the glass tube 9 are combined, the glass tube 9 is turned about the turning axis A by about 4.5 turns. The total length of the double spiral arc tube 2 is 60 mm, and the maximum outer diameter is 37 mm.

  As shown in FIG. 2, the electrode 8 is sealed inside the end portion 93 of the glass tube 9. For example, a tungsten coil electrode is used as the electrode 8. The coil electrode is supported by a pair of lead wires 8a and 8b temporarily fixed by a bead glass 82 (a so-called bead glass mounting method).

  An electrode is also sealed at the end 92 of the other glass tube 9, but illustration thereof is omitted, and lead wires 7a and 7b connected to coil electrodes (not shown) are led out from the end 92. ing.

  As shown in FIG. 2, an exhaust pipe 85 for exhausting the inside of the glass tube 9 is sealed at the end of the glass tube 9 when the electrode 8 is attached. . The distance between the electrodes in the glass tube 9 is 400 mm.

A rare earth phosphor 95 is applied to the inner surface of the glass tube 9. The phosphor 95, the red, green, three blue light-emitting, for example, _{Y 2 O 3: Eu, LaPO} 4: Ce, Tb and _{BaMg 2 Al 16 O 27: Eu} , is a mixture of Mn phosphor Used.

  Further, inside the glass tube 9, about 5 mg of mercury is sealed in a single form, and a mixed gas of argon and neon gas as a buffer gas (the volume ratio of neon in this mixed gas is about 25%) It is sealed at 400 Pa through the exhaust pipe 85.

  Here, the arc tube 2 is completed by applying the phosphor 95 on the inner surface of the glass tube 9 or enclosing a rare gas, and in the following description using the “arc tube 2”. The portions corresponding to the end portions 92 and 93 of the glass tube are hereinafter referred to as end portions 92 and 93 of the arc tube 2, and the portion closer to the end portion of the end portion 92 of the glass tube 9 is hereinafter referred to as the arc tube 2. Hereinafter, the portion near the end portion of the end portion 93 of the glass tube 9 is referred to as the end portion close portion 92 a, and hereinafter referred to as the end portion close portion 93 a of the arc tube 2.

  As shown in FIG. 1, end portions 92 and 93 of the arc tube 2 are inserted into the holder 6 and fixed to the holder 6 with, for example, a silicon adhesive (not shown). The holder 6 will be described in detail later.

  As shown in FIG. 1, a substrate 31 is attached to the back side (base 5 side) of the holder 6, and a plurality of electrical components 32, 33 and the like for lighting the arc tube 2 are mounted on the substrate 31. ing. The electronic ballast 3 is constituted by these electric components 32 and 33.

  The case 4 is made of a synthetic resin and has an upwardly expanding cylindrical shape. The holder 6 equipped with the arc tube 2 and the substrate 31 is inserted into the case 4 from the electronic ballast 3 side (lower side) and fixed. A base 5 (for example, for E26) is attached to the lower portion of the case 4, that is, on the side opposite to the opening. In FIG. 1, illustration of electrical connection between the base 5 and the electronic ballast 3 is omitted.

  The base 5 is a screw-in type, and its central axis substantially coincides with the turning axis A of the arc tube 2, and this axis is sometimes referred to as “lamp central axis” hereinafter.

(2) Configuration of Holder FIG. 3 is a perspective view of the holder as viewed obliquely from above. 4 is a perspective view of the holder equipped with the arc tube as seen from the front side, and FIG. 5 is a perspective view of the holder equipped with the arc tube as seen from the back side.

  As shown in FIGS. 3 to 5, the holder 6 has a bottomed cylindrical shape and includes a bottom wall 61 and a peripheral wall 62. The bottom wall 61 is provided with two receiving ports 63 and 64 for receiving the ends 92 and 93 of the arc tube 2 therein. The ends 92 and 93 of the arc tube 2 received in the holder 6 from the receiving ports 63 and 64 are fixed by an adhesive 65 such as silicon as shown in FIG. As a result, the arc tube 2 is held by the holder 6.

  Here, when the end portions 92 and 93 of the arc tube 2 are received in the holder 6 through the receiving ports 63 and 64, the receiving ports 63 and 64 from the direction (on the track) in which the end portions 92 and 93 move. Is the direction in which the end portions 92 and 93 move and does not reach the receiving port, “upstream side of the receiving port”, and conversely, the region beyond the receiving port is “ “Downstream of the receiving port”.

  As shown in FIG. 3, the bottom wall 61 is substantially orthogonal to the central axis B of the peripheral wall 62 (hereinafter, this axis is referred to as “the central axis B of the holder 6”), and the center O2 of the bottom wall 61 is The central axis B of the holder 6 passes. The arc tube 2 is held by the holder 6 in a state where the central axis B of the holder 6 and the pivot axis A of the arc tube 2 substantially coincide.

  As shown in FIG. 3, the receiving ports 63 and 64 have a circular shape corresponding to the external shape of the end portions 92 and 93 so that the end portions 92 and 93 of the arc tube 2 are inserted. The formed surface is formed so as to be orthogonal to the bottom wall 61.

  The positions of the centers O3 and O4 of the circular receiving ports 63 and 64 are such that the arc tube 2 is swung around the swivel axis A in a state where the swivel axis A of the arc tube 2 is aligned with the central axis B of the holder 6 ( When rotated in the right direction in FIG. 3, the centers of the end portions 92 and 93 of the arc tube 2 are on the orbit X in plan view.

  That is, the distance (corresponding to the diameter D2 in FIG. 3) connecting the centers O3 and O4 of the receiving ports 63 and 64, and the diameter of the tube axis of the glass tube 9 constituting the arc tube 2 is rotated around the rotation axis A ( (Corresponding to D1 in FIG. 2).

  The positions of the receiving ports 63 and 64 at the centers O3 and O4 are substantially in the center in the thickness direction of the bottom wall 61 and are in a plane parallel to the surface of the bottom wall. The wall 61 protrudes in a substantially semicircular shape, and the lower half of the periphery is recessed from the bottom wall 61 in a substantially semicircular shape.

  At the upstream side of the receiving ports 63 and 64, when the end portions 92 and 93 of the arc tube 2 are received in the holder 6, the end portions 92 a and 93 a near the end portion of the arc tube 2 come into contact with the arc tube 2. Guide grooves 66 and 67 are formed for guiding and restricting the end portions 92 and 93 of the arc tube 2 to the receiving ports 63 and 64 when the periphery of the turning axis A is rotated in the turning direction. The guide grooves 66 and 67 correspond to the guide restricting portion of the present invention.

  That is, the guide grooves 66 and 67 are formed along the turning direction corresponding to the outer circumferences of the end-side portions 92a and 93a that are curved in a spiral shape, and are continuous with the peripheral edges of the lower half of the receiving ports 63 and 64. Yes. Specifically, the shape of the bottom surface in the cross section of the guide grooves 66 and 67 is substantially semicircular corresponding to the shape of the guide grooves 66 and 67 side of the portions 92a and 93a near the ends of the arc tube 2. And is in contact with the outer peripheral surfaces of the portions 92 a and 93 a near the end of the arc tube 2. The bottom surfaces of the guide grooves 66 and 67 are hereinafter referred to as “contact surfaces 66a and 67a”. The contact surfaces 66a and 67a become larger as the recessed amount (depth) approaches the receiving ports 63 and 64.

  In other words, the contact surfaces 66a and 67a in the guide grooves 66 and 67 also have the central axis B while being inclined by the helical angle β with respect to the central axis B of the holder 6 in accordance with the end portions 92a and 93a of the arc tube 2. It is formed to turn around.

  On the other hand, on the downstream side of the receiving ports 63 and 64, cover portions 68 and 69 are formed so as to cover the end portions 92 and 93 of the arc tube 2 received in the holder 6 and the end portions 92a and 93a. As shown in FIG. 3, the cover portions 68 and 69 are formed in a tunnel shape starting from the peripheral edge of the upper half of the receiving ports 63 and 64 and extending along the turning direction of the end portions 92 a and 93 a of the arc tube 2. Yes.

  Specifically, the surfaces covering the end portions 92a, 93a of the arc tube 2 in the cross section of the cover portions 68, 69 are the cover portions 68, 69 in the cross section of the end portions 92a, 93a of the arc tube 2. It rises in a semicircular shape corresponding to the outer peripheral shape of the side (upper) half, and the raised amount (height) becomes smaller as the distance from the receiving ports 63 and 64 increases.

2. Assembling Process of Light Bulb-Type Fluorescent Lamp The assembling process of the light-bulb-shaped fluorescent lamp 1 having the above configuration, particularly the process of assembling the arc tube 2 to the holder 6 will be described. FIG. 6 is an explanatory view illustrating a process in which the arc tube 2 is received in the holder 6 from the receiving ports 63 and 64.

  First, a double spiral arc tube 2 and a holder 6 for holding the arc tube 2 are prepared, and the center axis B of the holder 6 and the pivot axis A of the arc tube 2 are substantially aligned with each other. After the portions 92 and 93 are aligned so as to be on the guide grooves 66 and 67 on the upstream side of the receiving ports 63 and 64 in a plan view (when viewed from the direction of the central axis B), FIG. As shown by the arrows, the arc tube 2 is brought close to the holder 6 along the central axis B of the holder 6, and the end portions 92 a and 93 a of the arc tube 2 are placed on the guide grooves 66 and 67 of the holder 6. .

  At this time, the guide grooves 66 and 67 are in contact with the outer peripheral surface of the guide grooves 66 and 67 side (lower side) in the end portions 92a and 93a of the arc tube 2, and the contact surfaces 66a and 67a are Since it has the same shape as the guide grooves 66 and 67 side halves of the end portions 92a and 93a of the arc tube 2, the arc tube 2 is placed on the guide grooves 66 and 67 in a stable state.

  Further, the guide grooves 66 and 67 are upstream of the receiving ports 63 and 64, and range C from the receiving ports 63 and 64 to a position rotated about 1/5 of the circumference around the central axis B of the holder 6 (see FIG. 3). ), The arc tube 2 can be easily placed on the guide grooves 66 and 67.

  Next, when the arc tube 2 is placed on the holder 6 and the arc tube 2 is rotated in the swivel direction around the pivot axis A as shown by the arrow in FIG. The end portions 92 and 93 approach the receiving ports 63 and 64 while being guided by the guide grooves 66 and 67, and eventually enter the holder 6 from the receiving ports 63 and 64 as shown in FIG. And insert.

  At this time, since the guide grooves 66 and 67 are continuously formed up to the receiving ports 63 and 64 along the turning direction of the end portions 92a and 93a of the arc tube 2, the rotation axis A of the arc tube 2 and In a state where the central axis B of the holder 6 is substantially coincident, the arc tube 2 placed on the guide grooves 66 and 67 is broken by simply rotating the arc tube 2 around the turning axis A. Instead, the end portions 92 and 93 of the arc tube 2 are guided to the receiving ports 63 and 64 and are smoothly received from the receiving ports 63 and 64 into the holder 6. This eliminates the conventional problem that the end of the arc tube is difficult to insert into the receiving ports 963 and 964 of the holder 906.

  Further, as described above, when the arc tube 2 is rotated around the turning axis A after the end portions 92a and 93a of the arc tube 2 are placed in the guide grooves 66 and 67 of the holder 6, the arc tube 2 is obtained. Since the end portions 92 and 93 are inserted into the holder 6 through the receiving ports 63 and 64, this process can be automated.

  Further, in the bulb-type fluorescent lamp 1 in which the arc tube 2 is assembled to the holder 6 having the above-described configuration, the end portions 92 a and 93 a of the arc tube 2 received in the holder 6 are covered with the cover portions 68 and 69. Therefore, the portions where the electrodes and the like at the end portions 92 and 93 of the arc tube 2 are sealed can be hidden.

3. Others (1) Cover Section In the above embodiment, the cover sections 68 and 69 are formed on the downstream side of the receiving openings 63 and 64 of the holder 6, but the arc tube 2 is connected to the holder 6 from the receiving openings 63 and 64. In order to receive the inside, the guide grooves 66 and 67 only need to be formed on the upstream side of the receiving ports 63 and 64. Therefore, the cover portions 68 and 69 may not be provided.

  FIG. 7 is a perspective view showing a holder having no cover portion.

  As shown in the figure, the holder 106 includes receiving ports 163 and 164 and guide grooves 166 and 167 in the bottom wall 161. The guide grooves 166 and 167 have the same configuration as the guide grooves 66 and 67 in the first embodiment. The peripheral edges of the receiving ports 163 and 164 are the opening peripheral edges formed in the bottom wall 161 by removing the cover portions 68 and 69 in the first embodiment, and guide grooves 66 and 67 similar to those in the first embodiment. It consists of the opening periphery of the lower half of the receiving ports 63 and 64 formed at the end on the downstream side.

  Since this holder 106 does not have a cover part (68, 69), the unevenness | corrugation of the bottom wall 161 can be decreased and especially designability can be improved. However, in this case, the end portions 92 and 93 of the arc tube 2 need to be received in the holder 106 to such an extent that the electrode sealing portion is hidden.

(2) About the guide groove ・ About the shape of the cross section In the first embodiment, the guide grooves 66 and 67 are the peripheral surfaces of the guide grooves 66 and 67 side half of the portions 92 a and 93 a near the end of the arc tube 2. When the arc tube 2 is rotated when the arc tube 2 is assembled, the arc tube 2 is regulated so as not to be displaced in a direction (lateral direction) perpendicular to the turning axis A. However, if the guide grooves 66 and 67 can regulate the shift in the direction orthogonal to the turning axis A when the arc tube 2 is rotated, the guide grooves 66 and 67 are located at the end portions 92a and 93a of the arc tube 2. It is not necessary to contact substantially the entire half of the guide grooves 66 and 67.

  For example, the groove shape in the cross section of the guide grooves 66 and 67 is concave, “V” shape, and the holder 6 side portion in the direction of the turning axis A in the cross section of the portions 92 a and 93 a near the end of the arc tube 2. The guide grooves 66 and 67 can guide the end portions 92 and 93 of the arc tube 2 to the receiving ports 63 and 64 even if they have an arc shape including the same shape as a part of the arc tube.

Regarding the shape of the longitudinal section In the first embodiment, the guide grooves 66, 67 have contact surfaces 66a, 67a that are continuous in the swiveling direction along the end portions 92a, 93a of the arc tube 2, When the arc tube 2 is rotated about the turning axis A, the movement of the ends 92 and 93 of the arc tube 2 is regulated and guided to the receiving ports 63 and 64 along the turning direction.

  However, the guide grooves 66 and 67 can support the arc tube 2 before being received in the holder 6 in a stable state, and when the arc tube 2 is rotated around the turning axis A, the end 92 of the arc tube 2 is obtained. , 93 can be guided along the turning direction to the receiving ports 63, 64, while it is not necessary to have a contact surface continuous in the turning direction.

  As an example of this, in the swiveling direction on the peripheral surfaces of the portions 92a, 93a near the end of the arc tube 2 in the state before being inserted into the holder 6 (the state of being placed on the guide grooves 66, 67). And at least two locations along the arc tube 2, and even if the arc tube 2 is rotated, it should always be in contact with the peripheral surfaces of the end portions 92 a and 93 a of the arc tube 2 at two or more locations. The contact surface may be provided discontinuously in the turning direction.

  As a specific example, it is conceivable to form contact portions that contact along the transverse section of the end portions 92a and 93a of the arc tube 2 at intervals in the turning direction. In such a case, the same effect as that of the continuous contact surfaces 66a and 67a can be obtained.

(3) Receiving port In the first embodiment, the receiving ports 63 and 64 formed in the bottom wall 61 of the holder 6 have a circular shape in accordance with the cross-sectional shape of the end portions 92 and 93 of the arc tube 2. However, when the external shape in the cross section of the arc tube 2 becomes another shape, it is preferable to form the receiving ports 63 and 64 according to the shape.

  However, if the end portions 92 and 93 of the arc tube 2 can be inserted into the holder 6, the shape of the receiving ports 63 and 64 is made to match the external shape of the cross section of the end portions 92 and 93 of the arc tube 2. It is not necessary.

  As a specific example, the outer peripheral shape of the cross section of the end portions 92 and 93 and the end portions 92 a and 93 a of the arc tube 2 is circular, and the receiving port has a circular diameter in the cross section of the arc tube 2. For example, it may be a substantially square shape with one side.

  However, in this case, a gap more than necessary is formed between the corner of the square receiving port and the outer peripheral surface of the portion 92a, 93a near the end of the arc tube 2, so that the end of the arc tube 2 is formed from this gap. There is a possibility that the adhesive 65 at the time of fixing 92 and 93 to the holder 6 flows out.

  Further, the virtual surface on which the receiving ports 63 and 64 are formed is orthogonal to the bottom wall 61 and passes through the central axis B of the holder 6. For example, the virtual surface on which the receiving ports 63 and 64 are formed is provided. The surface may not pass through the central axis B of the holder 6. As such an example, the surface with the receiving ports 63 and 64 may be inclined with a predetermined angle with respect to the radial direction.

  Further, the centers of the receiving ports 63 and 64 are in the plane substantially in the center in the thickness direction of the bottom wall 61 and substantially parallel to the surface thereof, but the position of the center of the receiving port in the direction of the central axis B is If the 64 and the guide grooves 66 and 67 are along the spiral shape in the end portions 92a and 93a of the arc tube 2, it is not necessary to match the bottom wall 61. For example, the receiving ports 63 and 64 are formed as a whole. However, it may overhang from the bottom wall 61, and conversely, it may be buried in the bottom wall 61.

<Second Embodiment>
The inventors first examined the holder 6 that can easily receive the end portions 92 and 93 of the arc tube 2 and the method of assembling the arc tube to the holder 6. As a result, the guide grooves 66 and 67 are formed on the upstream side of the receiving ports 63 and 64 of the holder 6 as described in the first embodiment, so that the end portions 92 and 93 of the arc tube 2 are connected to the holder 6. Within easy to accept.

  However, next, the lead wires 7a, 7b, 8a, 8b for the electrodes are led out from the end portions 92, 93 of the arc tube 2, and then inserted into the holder 6 described in the first embodiment. Then, it has been found that the lead wires 7a, 7b, 8a, 8b do not smoothly enter the receiving ports 63, 64 of the holder 6.

  Therefore, the present inventors have studied a holder that can easily insert the end of the arc tube into the holder even if the electrode lead wire is led out from the end of the arc tube, and assembled the arc tube into the holder. First of all, a preliminary study was conducted on the attaching method. As a result, it has been found that when the lead wire is bent in a direction parallel to the pivot axis of the arc tube and inserted from the pivot axis direction into the receiving port, the lead wire enters the receiving port relatively easily.

1. FIG. 8 is a perspective view showing a holder in which an electrode lead wire can be easily inserted. The holder 206 has been conceived based on the result of the preliminary examination described above, and the feature of the holder 206 is that it is substantially parallel to the central axis B of the holder 206 when the arc tube 202 is assembled. In order to make it easier to accept a certain lead wire 207a, 207b, 208a, 208b (see FIG. 9), an opening is formed in plan view so that the lead wires 207a, 207b, 208a, 208b pass in a direction parallel to the central axis B. Thus, the receiving ports 263 and 264 are formed.

  The receiving ports 263 and 264 of the holder 206 are inclined so that the upper sides thereof open to the downstream side. Specifically, the virtual surfaces on which the receiving ports 263 and 264 are formed are inclined with respect to the central axis B of the holder 206 at an angle γ, for example, 40 °, and when viewed in a plan view, An opening is formed between 269 and the guide grooves 266 and 267.

2. Assembling Step FIG. 9 is a diagram for explaining a step of assembling the arc tube having the lead wires for electrodes to the holder. First, the lead wires 207a, 207b, 208a, and 208b that are derived from the end portion 293 (294) of the arc tube 202, indicated by the solid line in FIG. 9A, are indicated by virtual lines in FIG. 9A. In this manner, the arc tube 202 is bent in a direction near the end 293 (294) of the arc tube 202 in a direction parallel to the turning axis direction of the arc tube 202 and opposite to the folded portion 91.

  Next, the center axis B of the holder 206 and the pivot axis A of the arc tube 202 are substantially aligned, and the lead wires 207a, 207b, 208a, and 208b are connected to the cover portions 268 and 269 of the holder 206 and the guide grooves in plan view. 266 and 267 so as to enter the opening. Then, the arc tube 202 is brought close to the holder 206 along the direction indicated by the arrow in FIG.

  At this time, the lead wires 207a, 207b, 208a, 208b bent in a state substantially parallel to the turning axis A are formed between the cover portions 268, 269 and the guide grooves 266, 267 as shown in FIG. It can be easily received in the holder 206 through the opening in between.

  Then, the arc tube 202 is continuously brought close to the holder 206, and the end portion 293 a (294 a) of the arc tube 202 is eventually placed on the guide grooves 266 and 267 of the holder 206. The subsequent steps are the same as the assembly steps described in the first embodiment.

3. Others (1) Inclination of receiving port 1. In the second embodiment described above. In the configuration of the holder 206 described in the above, the receiving ports 263 and 264 are inclined at an angle of 40 ° (β in the figure) with respect to the central axis B of the holder 206 as shown in FIG. It is not limited to °. The angle γ is not particularly limited as long as it is less than 90 °, but a range of 20 ° to 60 ° is preferable.

  If the angle γ is less than 20 °, the openings formed between the cover portions 268 and 269 and the guide grooves 266 and 267 are reduced, and the lead wires 207a, 207b, 208a, and 208b are inserted into the holder 206 from the openings. It is because it becomes difficult to make it insert.

  On the contrary, if the angle γ is larger than 60 °, the adhesive used for fixing may flow out from the receiving ports 263 and 264 when the ends 293 and 294 of the arc tube 202 are fixed to the holder 206. It is.

  In addition, the receiving ports 263 and 264 are inclined at the same angle in both the upper half (edges of the cover portions 268 and 269) and the lower half (edges of the guide grooves 266 and 267). Either the upper half or the lower half of the receiving port may be inclined, or the inclination angles of the upper half and the lower half may be different.

(2) Modification in Second Embodiment In the second embodiment, in order to make it easier to receive the lead wires 207a, 207b, 208a, 208b from the receiving ports 263, 264, the receiving ports 263, 264 are provided. Inclined so that an opening can be formed between the cover portions 268 and 269 and the guide grooves 266 and 267 when seen in a plan view. However, the cover portions 268 and 269 and the guide grooves 266 and 267 may be formed by other configurations. An opening may be formed between them.

  FIG. 10 is a perspective view of a holder in which a notch is formed around the receiving port. As shown in the figure, the holder 206 has notches 270a, 270b, 271a, 271b, cover portions 268, 269 and guide grooves 266 so that the receiving ports 263, 264 in plan view are widened (the above-mentioned opening can be made). 267. Similarly to the second embodiment, the holder 206 also has the lead wires (207a, 207b, 208a, 208b) parallel to the pivot axis A of the arc tube 202 when the arc tube 202 is assembled to the holder 206. If bent, the lead wires 207 a, 207 b, 208 a, 208 b led out from the ends 293, 294 of the arc tube 202 can be easily received in the holder 206.

  Further, the notches 270a, 270b, 271a, 271b are formed in both the cover portions 268, 269 and the guide grooves 266, 267. For example, which of the cover portions 268, 269 and the guide grooves 266, 267 It may be formed on either side. However, in this case, the area of the notch should be secured to the same extent as the sum of the areas of the notches 270a, 270b, 271a, 271b formed in both the cover parts 268, 269 and the guide grooves 266, 267. Needless to say, the lead wires 207a, 207b, 208a, 208b can be easily received in the holder 206.

  The shape of the notches 270a, 270b, 271a, and 271b is an arc shape in plan view in FIG. 10, but may be other shapes, for example, a “V” shape or a concave shape.

  Further, even if slits are formed instead of the notches 270a, 270b, 271a, and 271b, the same effect can be obtained, although it is more difficult to insert the slits than those in which the notches are formed.

  Moreover, you may combine 2nd Embodiment and said example. For example, the notches 270b and 271b may be formed in the guide grooves 266 and 267 by inclining the peripheral edges of the receiving portions 263 and 264 on the cover portions 268 and 269 with respect to the central axis B of the holder 206. .

<Third Embodiment>
First, the inventors can easily insert the end of the arc tube into the holder (first embodiment), and lead wires 207a and 207b led out from the ends 293 and 294 of the arc tube 202. , 208a, 208b can be smoothly inserted into the holder 206 (second embodiment), and a method of assembling the arc tube 202 to the holder 206 has been studied.

  As a result, the inventors formed the guide grooves 66 and 67 on the upstream side of the receiving ports 63 and 64 of the holder 6 as described in the first and second embodiments, and the receiving port in a plan view. The openings of 263 and 264 were enlarged.

  However, when the end of the arc tube 202 inserted into the holder 206 is fixed to the holder 206 with an adhesive, the adhesive should be sufficiently placed between the holder 206 and the end of the arc tube 202 and a portion near the end. A new problem has arisen that it cannot be injected.

  FIG. 11 is a perspective view showing a holder capable of sufficiently injecting an adhesive into a fixing portion between the holder and the arc tube. As shown in the figure, the holder 306 in the present embodiment injects an adhesive between the portion near the end of the arc tube and the bottom surfaces of the guide grooves 366 and 367 (surfaces fixed to the arc tube). A plurality of, for example, three injection holes 380 are provided in the bottom portions 366a and 367a of the guide grooves 366 and 367.

  In FIG. 11, since the holder 306 is turned upside down, the guide grooves 366 and 367 are mountain-shaped. The injection hole on the guide groove 367 side is not shown because it is hidden by the peripheral wall 362.

  According to this configuration, the bottom portions 366a and 367a of the guide grooves 366 and 367 are formed between the bottom surfaces of the guide grooves 366 and 367 and the outer peripheral surface near the end of the arc tube that contacts or faces the guide grooves 366 and 367. The adhesive is reliably injected from the injection hole 380. Thereby, the arc tube and the bottom surfaces of the guide grooves 366 and 367 can be firmly and securely fixed.

  Further, since three injection holes 380 are provided along the turning direction of the portion near the end of the arc tube at the bottom portions 366a and 367a of the guide grooves 366 and 367 of the holder 306, the guide grooves 366 and 367, the arc tube, Can be filled almost uniformly with the adhesive.

  Thereby, the injection amount of the adhesive can be optimized. Moreover, since the injection hole 380 is in the bottom portions 366a and 367a of the guide grooves 366 and 367, when the arc tube is fixed to the holder 306, it cannot be seen from the outside, and the design is not inferior.

  FIG. 12 is also a perspective view showing a holder that can solve the above problem. The holder 306 includes surrounding walls 381 and 382 for preventing the adhesive injected around the end of the arc tube received in the holder 306 from flowing out. The surrounding walls 381 and 382 are formed on the back surface of the bottom wall 361 so as to surround an end portion of the arc tube in the holder 306 and a portion near the end portion.

  As a result, the adhesive injected into the periphery of the end of the arc tube is prevented from flowing out to the center of the back surface of the bottom wall 361, and the end and end of the arc tube are blocked by the adhesive blocked by the surrounding walls 381 and 382. The portion close to the part is securely fixed to the holder 306.

  Further, since the surrounding walls 381 and 382 are formed around the end portion and the portion near the end portion of the arc tube, the arc tube and the surrounding walls 381 and 382 are fixed to each other with an adhesive. Thus, the arc tube and the holder 306 can be more firmly fixed.

  The surrounding walls 381 and 382 also have a function of restricting the reception of the arc tube by abutting against the end surface of the arc tube when the end of the arc tube is received in the holder 306. Thereby, the receiving length of the arc tube can be made substantially constant. In addition, this function can be sufficiently used as a regulating wall even when an adhesive is not injected into the surrounding walls 381 and 382.

<Fourth embodiment>
By using the holders 6, 206 and 306 described in the first to third embodiments, the present inventors can easily assemble the arc tube to the holder, and further strengthen the arc tube and the holder. It became possible to stick to.

  However, when the board on which the electronic ballast is mounted is attached to the holder and the lead wire led out from the end of the arc tube is connected to the base side of the board, the lead wire crosses or gets entangled in the holder. There was a problem such as dripping.

  The inventors of the present invention formed a holding portion for holding the lead wire in the holder to solve the above problem. Hereinafter, the configuration of the holding unit will be described.

  FIG. 13 is a perspective view showing a holder having a holding portion. As shown in the drawing, the holder 406 has holding portions 491 and 492 for holding lead wires on the back surface of the bottom wall 461 and in the vicinity of each end portion of the arc tube received inside. .

  The holding portions 491 and 492 include a pair of holding bases 491a and 492a formed on the back surface of the bottom wall 461, and holding slits 491b and 492b for holding a pair of lead wires on the holding bases 491a and 492a, respectively. Is formed.

  Each of the pair of holding slits 491b and 492b formed on the holding bases 491a and 492a is formed at a distance from each other so as to hold the pair of lead wires apart from each other.

  When a substrate is mounted on the holder 406, first, the pair of lead wires led out from the end of the arc tube fixed to the holder 406 is not crossed or entangled in the holder 6, so that the holding portion Lead wires are inserted into the holding slits 491b and 492b of 491 and 492, respectively.

  The lead wires held in the holding slits 491 b and 492 b are led out to the outside of the holder 406 so as not to cross and get entangled in the holder 406, and then the substrate on which the electronic ballast is mounted is attached to the peripheral wall 462, for example. Install.

  As a result, the lead wires do not get entangled in the holder 406, and the pair of lead wires led out from the respective ends of the arc tube are held by the holding slits 491b and 492b at a distance from each other. Therefore, there is no contact (short circuit).

  Note that the holding portions 491 and 492 may not be formed on the back surface of the bottom wall 461 of the holder 406 but may be formed on other portions. As this example, as shown in FIG. 14, it is conceivable to form directly on the peripheral wall 462 of the holder 406. The two holding portions 495 and 496 corresponding to the respective end portions are formed of a pair of holding slits 495a and 496a formed in the peripheral wall 462, and are opposed to each other with, for example, the center axis of the holder 406 interposed therebetween. It is formed in the position to do.

(Modification)
Although the present invention has been described based on each embodiment, the content of the present invention is not limited to the specific examples shown in each of the above embodiments. For example, the following modifications are possible. Can be implemented.

1. Regarding the holding member In each of the above embodiments, the holding member is integrally provided with the bottom wall and the peripheral wall. However, for example, only the bottom wall may be used. In this case as well, the same effect can be obtained if a receiving port, a guide restricting portion, a cover portion, and the like are formed on the bottom wall as in the above embodiments.

  In each of the above embodiments, the arc tube is held by the holding member so that the pivot axis of the arc tube and the central axis of the holding member (holder) coincide. However, for example, the arc tube may be held with a tilt with respect to the holding member, that is, with the pivot axis of the arc tube tilted with respect to the central axis of the holding member.

  In this case, for example, the receiving port, the guide restricting portion, and the cover portion are inclined with respect to the central axis of the holding member in accordance with the inclination of the central axis of the bottom wall with respect to the turning axis of the arc tube. Even when the arc tube is tilted and held in this way, the receiving port, the guide restricting portion, and the cover portion are the same as those in the above embodiments as long as the pivot axis of the arc tube passing through the center of the bottom wall is used as a reference. The positional relationship is obtained, and the effects described in the above embodiment can be obtained.

  Furthermore, in the embodiment, the central axis of the holding member and the pivot axis of the arc tube substantially coincide on the same line, but it is not necessary to make both axes coincide. In this case, if the positions of the receiving port of the holding member, the guide portion, the cover portion, etc. are based on the pivot axis at the position where the arc tube is mounted, the same effect as the above embodiment can be obtained.

2. Shape of arc tube In each of the above embodiments, a double spiral arc tube is used, but arc tubes of other shapes may be used. As such an example, there are three U-shaped or four U-shaped glass tubes in which a plurality of, for example, three or four glass tubes curved in a U shape are connected. In this case, of course, it is necessary to turn the portion closer to the end where the electrode is mounted with respect to the desired vertical axis.

  Further, when viewed from the vertical axis direction, the portion near the end of the arc tube has an arc shape that rotates around the vertical axis (the rotation axis in the embodiment), and also viewed from the direction perpendicular to the vertical axis. May be an “L” shape orthogonal to the vertical axis (that is, when the spiral angle is 90 degrees). In this case, what is necessary is just to form the guide control part (and cover part) of a holding member in the direction orthogonal to the said vertical axis | shaft. Alternatively, even if a guide surface that contacts the outer peripheral portion of the bottom wall near the end of the arc tube is formed on the bottom wall, when the arc tube is rotated about the vertical axis, the end of the arc tube is guided to the receiving port. it can.

  Furthermore, the portion closer to the end of the arc tube may be pivoted around the pivot axis from, for example, the folded portion of the arc tube to one end. Also in this case, if the holding member has a guide restricting portion along the end track when the arc tube is swung around the swivel axis, the same effect as in the above embodiment can be obtained. be able to. In addition, it is thought that the dimension near the edge part of an arc_tube | light_emitting_tube needs the dimension from the edge part of an arc_tube | light_emitting_tube more than the dimension of the turning direction in the guide control part of a support member.

3. Regarding the outer bulb The bulb-type fluorescent lamp in each of the above embodiments does not have an outer bulb that covers the arc tube, but it goes without saying that the present invention can also be applied to a bulb-type fluorescent lamp having an outer bulb. .

4). Assembling process In each of the above embodiments, the arc tube is rotated around the spiral axis after fixing the holder and moving the arc tube in the direction of the pivot axis. For example, the arc tube is fixed and the holder is moved. Alternatively, both the arc tube and the holder may be moved. In these cases, the same effects as those of the above embodiments can be obtained.

5. Others In the present embodiment, the incandescent lamp 60W equivalent product has been described.

6). Low-pressure mercury lamp The low-pressure mercury lamp according to the present invention has been described with respect to the bulb-type fluorescent lamp in the above embodiment, but can be applied to other lamps, for example, a fluorescent lamp (compact lamp) as shown in FIG.

  This fluorescent lamp 500 holds a double spiral arc tube 510 spirally turning from the center (folded portion) of the glass tube 520 to both ends, and the arc tube 510 (portions near both ends of the glass tube 520). A bottomed cylindrical holder 530, a case 540 fitted on the peripheral wall of the holding member 530, a globe 550 covering the arc tube 510, and a single cap 560 (fitting to a socket of a lamp and receiving power supply) For example, GX10q type).

  The bulb-type fluorescent lamp 1 in the above embodiment is used in a general bulb because the electronic ballast is not housed in the internal space formed by the holding member 530 and the case 540, and the shape of the base 560 is used. It differs greatly in that it is not a screw cap.

  The holder 530 has a receiving wall, a guide groove, and a cover portion formed on the bottom wall, as in the above-described embodiments. With such a configuration, the arc tube 520 can be easily inserted into the holder 530 as in each embodiment.

  The low-pressure mercury lamp according to the present invention can be used for receiving the end of the arc tube in the holding member.

It is a front view which shows the whole structure which notched the right half of the bulb-type fluorescent lamp in the 1st Embodiment of this invention. It is a front view which shows the structure which notched a part of arc tube in the 1st Embodiment of this invention. It is the perspective view which looked at the holder in the 1st Embodiment of this invention from diagonally upward. It is the perspective view which looked at the state which attached the arc tube to the holder in the 1st Embodiment of this invention from diagonally upward. It is the perspective view seen from diagonally upward which reversed the state which assembled | attached the arc_tube | light_emitting_tube to the holder in the 1st Embodiment of this invention up and down. It is a figure explaining the assembly | attachment process of the arc tube in the 1st Embodiment of this invention to a holder. It is a perspective view which shows the modification of the holder in the 1st Embodiment of this invention. It is the perspective view which looked at the holder in the 2nd Embodiment of this invention from diagonally upward. It is a figure explaining the assembly | attachment process of the arc tube in the 2nd Embodiment of this invention to a holder. It is a perspective view which shows the modification of the holder in the 2nd Embodiment of this invention. It is the perspective view which turned the holder in the 3rd Embodiment of this invention upside down, and was seen from diagonally upward. It is a perspective view which shows the modification of the holder in the 3rd Embodiment of this invention. It is the perspective view which turned the holder in the 4th Embodiment of this invention upside down, and was seen from diagonally upward. It is a perspective view which shows the modification of the holder in the 4th Embodiment of this invention. It is the example which applied this invention to the fluorescent lamp, Comprising: It is the front view which notched a part of lamp | ramp. It is the perspective view which looked at the holder in a prior art from diagonally upward.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light-bulb-type fluorescent lamp 2,202 Light-emitting tube 4 Case 5 Base 6,206,306,406,530 Holder 8 Electrode 9 Glass tube 63,64 Entrance 66,67 Guide groove 68,69 Cover part 263,264 Entrance 266 267 Guide groove 268, 269 Cover part 270a, 270b, 271a, 271b Notch part 366, 367 Guide groove 380 Injection hole 381 Enclosure wall 491, 492, 495, 496 Holding part 500 Fluorescent lamp A Swing axis B Center axis

Claims (11)

A low-pressure mercury lamp comprising a holding member that holds the arc tube in a state where at least one end of the arc tube is received from the receiving port,
A pair of electrode lead wires are led out from at least one end of the arc tube, and the portion close to the end is swung around the swivel axis to the end,
The receiving port is formed so as to open when viewed from the direction of the pivot axis,
The retaining member, during assembly of the arc tube, when rotating the arc tube to said pivot axis around includes a guide portion for guiding and regulating to said receiving port with said at least one end, said opening A low-pressure mercury lamp, wherein the lead wire is received .   2. The low-pressure mercury lamp according to claim 1, wherein the guide restricting portion is formed in a groove shape along a direction in which the at least one end portion turns around a turning axis.   The groove shape in the cross section of the guide restricting portion is the same as the shape of a part or all of the peripheral surface on the guide restricting portion side in the cross section of the portion near the end of the arc tube. The low-pressure mercury lamp according to claim 2. 2. The low-pressure mercury lamp according to claim 1 , wherein the opening is formed by inclining the receiving port at an angle in a range of 20 ° to 60 ° with respect to the swivel axis direction. The holding member includes a cover portion that covers at least one end portion of the arc tube that is received continuously to the outer peripheral edge of the receiving port, and the opening is formed in the cover portion and / or the guide portion. 2. The low-pressure mercury lamp according to claim 1 , wherein the low-pressure mercury lamp is formed by a notched portion. The low-pressure mercury lamp according to any one of claims 1 to 5 , wherein the at least one end is fixed inside the holding member via an adhesive. 6. The guide portion is characterized in that it has one or more injection holes for injecting the adhesive between the at least one end portion close received in said holding the member The low-pressure mercury lamp described in 1. The low-pressure mercury lamp according to claim 6 , wherein the holding member has a prevention wall for preventing the adhesive from flowing out. The low-pressure mercury lamp according to any one of claims 4 to 8 , wherein the holding member has a holding portion for holding the pair of lead wires at intervals. The arc tube, any one of claim 1 to 9, characterized in that it is formed in a double spiral on both sides of the substantially folded in the middle and the folded portion of the glass tube is pivoted to the pivot axis around The low-pressure mercury lamp described in 1. The lead wire for the electrode is led out from at least one end, and the arc tube in which the portion near the end revolves around the revolving axis, and the at least one end from the receiving port along the guide restricting portion A low pressure mercury lamp assembly method comprising a holding member for receiving and holding,
From the end of the arc tube, the receiving port of the holding member is open as viewed from the direction of the pivot axis,
Assembly of at least one end of the arc tube to the holding member is as follows:
Contacting the peripheral surface of the at least one end portion and the guide restricting portion of the holding member;
A step of rotating the arc tube relative to the receiving port relative to the swivel axis in the contacted state ,
The contact between the guiding portion of the peripheral surface and the holding member of the one end portion near the light emitting tube, the low-pressure mercury lamp, wherein the lead wire is Ru place in parallel to the said pivot axis Assembling method.

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