JP2016076383A - Method of manufacturing single cap lamp and single cap lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a single cap lamp which allows for simplification of manufacturing process, without causing any problem in the lamp appearance quality, even if a ceramic cap and an inner tube or an outer tube are joined by adhesive, and to provide a single cap lamp.SOLUTION: A method of manufacturing a single cap lamp where an inner tube having a ceramic cap and a pinch seal and an outer tube having an insertion opening at one end are joined by adhesive, an insertion opening of the inner tube sealing portion is provided in the center along the long axis of the cap, and the insertion opening has a bottom face that is a plane excepting the hole for passing a feeding lead, includes a step for cutting the outer lead of the inner tube to a predetermined length, abutting the outer lead against the bottom face of the insertion opening and positioning, before being applied with the outer tube, and a step for drying and hardening an adhesive for adhering the cap, inner tube and outer tube.SELECTED DRAWING: Figure 1

Description

The present invention relates to an inner tube that hermetically accommodates an arc tube or a filament, and a lamp having a base attached concentrically to the inner tube on one of the inner tubes to protect the lamp body from external damage, The present invention relates to a method of manufacturing a single-piece lamp with an outer tube attached and a single-piece lamp for the purpose of preventing scattering of fragments due to rupture and destruction of a main body, and suppressing or reducing ultraviolet radiation harmful to the human body.

This type of lamp is mainly used for spotlights in stores and the like. For this reason, an outer tube that further surrounds the inner tube that hermetically accommodates the arc tube or filament is provided so that the lamp fragments are not scattered outside even if the arc tube is broken. An example of this type of lamp is described in FIG. A base for attaching the inner pipe and the outer pipe on the base end side thereof includes a base terminal electrically connected to the socket, and a mounting portion attached to the inside of the base while holding the inner pipe and the outer pipe. An insertion hole for inserting and holding the pinch seal portion of the inner tube is formed in a support column formed with a substantially cylindrical outer peripheral surface that is inserted through the opening end of the outer tube and externally covers the outer tube. A support made of a thin metal plate that supports the inner tube concentrically with respect to the outer tube is attached to the portion, and a pinch seal portion is inserted into the insertion hole of the attachment base. The inner pipe is fixed to the base mounting portion by being filled with an inorganic adhesive until it reaches the position facing the outer lead welding end of the inner lead. Further, a low-temperature curing paste-like heat-resistant inorganic adhesive is applied and filled between the base and the base end of the inner tube and the outer tube that are concentrically attached to the base, and the inorganic adhesive is brought to the curing temperature. By heating, the inner tube and the outer tube are fixed to the base. As the low-temperature curing type paste-like heat-resistant inorganic adhesive, products that can be cured at a low temperature of, for example, about 100 to 300 ° C. and can withstand a high temperature of 1000 to 2000 ° C. after curing are commercially available.

In this type of lamp, as disclosed in Patent Document 1, an insertion port for an inner tube pinch seal portion and an adhesive injection port are provided on the side of the base on which the inner tube is inserted. When bonding the base and the inner tube, the inner tube can be bonded and fixed by attaching an adhesive to the inner tube pinch seal portion using the adhesive inlet. Such a configuration is common to a lamp in which only the inner tube is attached to the base. In the lamp with an outer tube, a step corresponding to the inner diameter of the outer tube opening is provided at the outer tube side end of the cap, and an adhesive is applied to the step and the outer tube opening, and then the outer tube is combined with the cap. Thus, the base and the outer tube can be bonded and fixed. If the outer tube temperature when the lamp is lit is relatively low, for example, if the bonding portion temperature is about 200 ° C., a silicone-based adhesive can be used for bonding the base and the outer tube.

JP 2002-373571 A Utility Model Registration No. 3124181 JP 2010-186621 A

As one of the problems of the conventional single-piece lamp, in the triple-tube single-piece lamp having an outer tube, when trying to make the lamp more compact, especially when trying to reduce the dimension in the diameter direction, Patent Document 2 If the outer diameter of the ceramic base is reduced to the same extent as the outer diameter of the outer tube as described in, the outer tube adhesive that bonds the base and the outer tube will be exposed through the transparent outer tube wall, The appearance quality of the lamp is impaired. At this time, if an opaque film is formed on the outer surface of the outer tube by adopting the invention disclosed in Patent Document 2, the deterioration of the appearance quality can be suppressed to some extent, but extra components as a lamp will increase.

Further, in the case of a structure in which an adhesive is injected from the injection port, the adhesive starts to adhere from the light emitting portion side of the inner tube pinch seal portion and spreads to the lead wire side. Then, when the lamp is lit, the adhesive covers the part where the molybdenum foil of the pinch seal part is sealed from the high temperature light emitting part side, and the temperature of the molybdenum foil rises excessively due to the heat retention effect of the adhesive As a result, the molybdenum foil tends to oxidize, and the inner tube may leak, shortening the lamp life.

Further, as disclosed in Patent Document 3, the base is divided into two members, a “base body” and an “attachment base”, and the inner tube and the outer tube are joined when the inner tube and the outer tube are joined to the attachment base. There is known a method for preventing deterioration in appearance quality by assembling a lamp without injecting adhesive from a ceramic base by injecting a necessary amount of adhesive from the opposite side of the insertion direction. The base body can be prepared with several types of parts, and the base body can be retrofitted according to the order status of the product. While this lamp structure is an advantage when performing production management to accommodate multiple types of sockets on the market, it is not the case when mass-producing lamps that are compatible with a single type of socket. It was not optimal because complexity caused cost increases.

Also, when manufacturing a triple-tube single-cap lamp in the range of the prior art, first fix the cap and inner tube to a jig, adjust the distance to the optical center of the inner tube to the specified value based on the cap, and then bond A process of filling the agent in a predetermined place and drying and curing, and further adhering the base and the outer tube, adopting a process of aligning the lamp with a jig, putting it in a drying furnace, taking it out and cooling it. Repeat twice. Since the inner tube adhesive and the outer tube adhesive can use the same type of adhesive, if the inner tube bonding and the outer tube bonding can be performed at the same time, the lamp manufacturing process is greatly simplified. This cannot be realized due to a limitation in the process that the outer tube can be bonded only after the optical center position of the inner tube is aligned and fixed to the base.

  In order to solve the above-described problems, the present invention provides an inner tube that accommodates a light-emitting tube or a light-emitting filament and is attached with an inner tube support plate, an outer tube that accommodates the inner tube, and a concentric shape at the proximal end The inner tube is formed in a pinch seal part by hot pressing the base end side attached to the base, and the pinch seal part has an inner portion for supplying electric power to the arc tube or the light emitting filament. A method of manufacturing a single-cap lamp, comprising a lead and an external lead that is led out from an inner tube and connected to a cap terminal, and a molybdenum foil welded to the lead is hermetically sealed, The base has a base terminal electrically connected to the socket at one end, an insertion opening for inserting and fixing the pinch seal portion of the inner pipe to the other end, and a column supporting the inner wall surface of the opening of the outer pipe When, A step of pinch-sealing so that a width-side dimension and a central wall thickness when the inner tube is viewed from the outer lead side are regulated, and the outer lead of the inner tube is connected to the pinch seal. A step of cutting from the lower end of the section at a position of a specified dimension, a step of connecting a power supply lead to each of the pair of external leads, and the inner tube to the base until the end of the outer lead of the inner tube hits the bottom surface of the insertion port The step of filling the adhesive between the pinch seal portion and the inner wall of the insertion port at the same time as the insertion, and covering the inner tube and the base to the position where the open end of the outer tube hits the flange portion of the support column, and simultaneously applying the adhesive It is a method for manufacturing a single cap lamp, including a step of filling between the support column and the inner wall of the outer end of the outer tube, and a step of simultaneously drying and curing an adhesive that bonds the cap, the inner tube and the outer tube.

Further, as another aspect of the present invention, an inner tube containing an arc tube or a luminous filament and having an inner tube support plate attached thereto, an outer tube accommodating the inner tube, and a concentric shape at the proximal end side A single base lamp comprising a base to be attached, wherein the inner tube is formed in a pinch seal portion by being hot-pressed so that a base end side attached to the base is regulated in dimensions in four directions;
The base has a base terminal electrically connected to the socket at one end, an insertion opening for inserting and fixing the pinch seal portion of the inner pipe to the other end, and a column supporting the inner wall surface of the opening of the outer pipe And a flange portion in contact with the open end of the outer tube, and a groove for guiding an adhesive between the outer tube and the base is formed on the outer side of the column, and at the end of the groove Is provided with a weir for blocking the flow of the adhesive, and the insertion port has a flat bottom surface excluding the hole through which the power supply lead passes, and is orthogonal to the wide side dimension W1 and the wide side of the insertion port. The dimension T1 of the opening center part is set to a dimension slightly larger than the wide side dimension W and the center part thickness T of the pinch seal part when the inner tube is viewed from the external lead side. , Adhered to the gap between the pinch seal portion and the inner wall of the insertion port Hama is a single capped lamp wherein is cured in a state of being adhered filled in a gap between the groove and the outer pipe wall while being.

According to the present invention, in a one-piece lamp formed by bonding a ceramic die and an inner tube or a ceramic die and an inner tube and an outer tube with an adhesive, the adhesive is used without separating the die body and the mounting base portion. It is possible to provide a one-piece lamp capable of reducing man-hours in the manufacturing process without deteriorating appearance quality.

Schematic which shows an example of the single cap lamp to which this invention is applied. The schematic which shows an example of the inner tube | pipe shape of the single cap lamp to which this invention is applied. Explanatory drawing which shows an example of the manufacturing process of the single cap lamp to which this invention is applied. Explanatory drawing which shows an example of the manufacturing process of the single cap lamp to which this invention is applied.

In the present invention, an inner tube that accommodates a light-emitting tube or a light-emitting filament and has an inner tube support plate attached thereto, an outer tube that accommodates the inner tube, and a base that concentrically attaches these on the base end side are assembled. The present invention relates to a method for manufacturing a single-cap lamp and a single-cap lamp. The base according to the present invention has a base terminal electrically connected to the socket at one end thereof, and supports the insertion opening for inserting and fixing the pinch seal portion of the inner pipe at the other end and the inner wall surface of the opening of the outer pipe. And an adhesive injection port in a direction perpendicular to the axis of the insertion port. The insertion port has a bottom surface that is a flat surface except for a hole for passing a power supply lead. The wide side dimension W1 of the insertion port and the dimension T1 of the opening central portion orthogonal to the wide side are determined when the inner tube is viewed from the external lead side. The pinch seal part is set to have a dimension slightly larger than the wide side dimension W and the central part thickness T. The inner tube is formed in the pinch seal portion by being hot-pressed so that the base end side attached to the base is regulated in four directions. The pinch seal portion has a molybdenum foil interposed between an internal lead that feeds power to the luminous tube or luminous filament and an external lead that is led out from the inner tube and connected to the cap terminal, and is welded to the molybdenum foil. Is hermetically sealed. On the other hand, the top portion of the inner tube is airtightly closed, and when the outer tube is covered, the position of the inner tube top portion in the outer tube is regulated via the inner tube support plate. When the inner pipe is inserted into the base, an adhesive injection port of the base is formed through at a position corresponding to the inner pipe pinch seal portion. In the case of a triple-tube lamp, a groove for guiding an adhesive from the inlet to the outer tube and the base is formed at the outer end of the adhesive inlet, and an adhesive is attached to the end of the groove. A dam for blocking the flow of the agent is provided.

In manufacturing a single-piece lamp, first, the inner tube is pinch-sealed so that the wide-side dimension and the central thickness when the inner tube is viewed from the external lead side are regulated. The outer lead of the inner tube is cut at a position of a specified dimension from the lower end of the pinch seal portion. A power feed lead is connected to each of the pair of external leads. The inner tube is inserted into the base until the end of the outer lead of the inner tube hits the bottom surface of the insertion port. The outer pipe is put on the inner pipe and the base until the opening end of the outer pipe hits the flange portion of the column. The adhesive is filled from the adhesive inlet to the region attached to the pinch seal portion 3. Adhesive is injected between the groove of the base and the inner wall surface of the outer tube. The adhesive that bonds the base to the inner tube and the outer tube is simultaneously dried and cured.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings of a triple-tube single-cap lamp. FIG. 1 is a view for explaining an example of the present invention by arranging a completed cross section and a view of a base as a main part. Fig.1 (a) is the fragmentary sectional view which looked at the finished product of the single cap lamp from the wide surface direction of the inner pipe pinch seal part. FIG. 1B is a partial cross-sectional view of the same lamp as seen from the side surface direction of the inner tube pinch seal portion, and illustrates an adhesive inlet and a groove or weir for fixing the outer tube. FIG.1 (c) is sectional drawing which looked at the nozzle | cap | die which is a main member of this invention from the same direction as FIG.1 (b). FIG.1 (d) is the figure which looked at the nozzle | cap | die of FIG.1 (c) from the inner tube insertion opening direction. FIG. 2 is a view showing the shape of the inner tube after pinch sealing. 3 and 4 are diagrams for explaining a manufacturing process of a triple-tube single-piece lamp according to the present invention, and FIG. 5 is a diagram showing an example of a double-tube single-piece lamp. In addition, in each drawing, the member which attached | subjected the same code | symbol shows the member which has the same or the same function.

In FIG. 1, reference numeral 1 denotes an arc tube, which is, for example, a ceramic metal halide lamp including a pair of tungsten electrodes. Reference numeral 2 denotes an inner tube. The arc tube is fixed in the inner tube by an appropriate support member, and members for supplying power to the arc tube are connected from both ends of the arc tube to the outside of the inner tube. For example, in the embodiment of FIG. 1, a pair of internal leads 4 and 4 connect from both ends of the arc tube to the inner tube pinch seal portion. This internal lead also has a function as an arc tube support member. In order to hermetically seal the inner pipe pinch seal portion, it is connected to the external leads 6 and 6 through the molybdenum foil 5 and connected to the power supply leads 7 and 8 outside the inner pipe. Instead of the arc tube, a filament that emits incandescent light when energized may be held in the inner tube. When a triple tube single cap lamp is used as shown in FIG. 1, the inner tube support plate 2B may be placed on the inner tube top portion using the inner tube tip-off portion 2A and the outer tube 11 may be covered.

In FIG. 1, reference numeral 12 denotes a base, and a detailed shape is shown in FIGS. 1 (c) and 1 (d). The main body of the base 12 is made of white ceramic, and has a base terminal 18 that is electrically connected to a socket (not shown) at one end, and the pinch seal portion 3 of the inner tube 2 is inserted and fixed to the other end. The insertion port 13 is provided. The insertion port 13 has a flat bottom surface 13A and is assembled so as to contact the end of the outer lead 6 of the inner tube. A hole penetrating from the insertion port is provided at the tip (lower end in FIG. 1) of the base terminal 18, and a feed lead 7 for feeding power to the arc tube 1 inside the inner tube 2 is inserted, and is electrically connected by silver solder or the like. Connection is fixed. This portion of the base 12 is referred to as an eyelet 19. Further, a metal shell 20 is assembled, and the feed lead 8 is connected and fixed.

FIG. 1C is a component diagram of the base 12, which is a cross-sectional view taken along a plane including the base axis of the base and the central axis of the adhesive injection port 15. FIG.1 (d) is the figure which looked at the nozzle | cap | die components of FIG.1 (c) from the insertion port 13 side. FIG. 2 is a component diagram of the inner tube 2. 2A is a front view, and FIG. 2B is a view of the inner tube 2 as viewed from the external lead 6 side. The external lead 6 is longer than the size required for actual assembly for the convenience of pinch seal processing. The distance from the lower end of the external lead 6 to the optical center (position of the plus sign) of the inner tube 2 is set to a dimension of G2. This G2 dimension is one standard for guaranteeing the optical center distance G0 in the final product. In the pinch sealing process, the quartz glass tube, which is the inner tube material, is heated and melted at its end to be pinch sealed. Since the pinch seal portion has a relatively large dimensional variation for each inner tube, the end surface of the pinch seal portion cannot be used as a reference for the position. However, since the mount assembly in which the metal member is welded from the arc tube center position serving as the reference of the optical center to the end of the external lead 6 can be configured, the dimension G2 in FIG. 2 does not change before and after the pinch seal process. Therefore, the G2 dimension can be used as a position reference in the subsequent processes. The shape when the pinch seal portion 3 is viewed from the external lead 6 side is a wide H shape in this embodiment, as shown in FIG. Here, for the sake of explanation, the width direction dimension of the pinch seal portion is W, and the thickness of the center portion of the pinch seal portion is T. In the pinch seal process, a mold that restricts four directions is used, and the dimensions of W and T are regulated when the pinch seal portion seal portion 3 is melt-molded.

A support column 14 is provided on the side of the insertion port 13 of the base 12 to cover the outer tube 11 and regulate the position. A flange portion 14A is provided at the base of the column 14, and the end surface of the outer tube 11 is abutted to regulate the position in the height direction. As shown in FIG. 1D, in this embodiment, the outer side of the support column 14 has a cylindrical shape, and the outer diameter D <b> 1 is set to be slightly smaller than the inner diameter D of the open end of the outer tube 11. Further, the shape of the insertion port 13 is similar to the shape of the pinch seal part, the W1 dimension is slightly larger than the width direction dimension W of the inner pipe 2, and the T1 dimension is the central part of the pinch seal part of the inner pipe 2. Slightly greater than thickness T. In the lamp of this embodiment, the process is managed so that the difference between W and W1 is in the range of about 0.1 mm to 1 mm even if the production lot changes. The process control is performed so that the difference between T and T1 is in the range of about 1.5 mm to 3 mm in order to fill the adhesive in between.

An adhesive injection port 15 is provided in a direction orthogonal to the axis of the base 12. As shown in FIGS. 1 (a) and 1 (c), the adhesive injection port 15 is provided at a position corresponding to the inner tube pinch seal portion 3 when the inner tube 2 is inserted into the base to the specified position. Yes. “Position corresponding to the inner tube pinch seal portion” means that when the adhesive 21 is injected, the pinch seal portion 3 can be seen from the adhesive injection port 15, or a thin stick is inserted into the adhesive injection port 15. It means a position where it can be brought into contact with the part 3. Preferably, the adhesive injection port 15 is provided at a position corresponding to a portion closer to the base terminal than the center point of the pinch seal portion 3. If comprised in this way, the influence by the heat transmitted from the arc_tube | light_emitting_tube 1 can be reduced, and the expansion | swelling and peeling of an adhesive agent can be suppressed. More preferably, the adhesive inlet 15 is provided at a position corresponding to a portion closer to the base terminal than an end portion on the external lead welding side of the molybdenum foil in the pinch seal portion. If comprised in this way, in addition to said effect, the deterioration and cutting | disconnection by the oxidation from the external lead side of molybdenum foil can be suppressed.

In FIG.1 (b), 21 is an adhesive agent and uses the white ceramic type adhesive which is 1 type of a heat resistant inorganic adhesive agent. The blackened area indicates the area filled with the adhesive. The adhesive injection ports 15 are provided at two locations, and the adhesive 21 is filled on the corresponding side of the pinch seal portion 3 respectively. The adhesive 21 is filled from the adhesive injection port 15 to a region adhering to the pinch seal portion 3 and also filled from the inside of the groove 16 to the weir 17 and the region adhering to the inner wall of the outer tube 11 corresponding to the portion. Has been. Since the ceramic adhesive 21 is white and the ceramic base 12 is also white, unless the adhesive protrudes irregularly from the base, the bonded portion is not noticeable and the appearance quality is not impaired. The adhesive that bonds the base and the inner tube may be the same type as the adhesive that bonds the base and the outer tube. For this reason, in the triple-tube lamp of this embodiment, the drying process of the inner tube adhesive and the drying process of the outer tube adhesive can be performed at a time, and the drying and curing process of the adhesive that is normally required twice is performed once. Can be reduced.

Next, a method for manufacturing a one-piece lamp using these components will be described. Manufacture of the single-piece lamp shown in the present embodiment is performed according to the steps shown in the next section with reference to FIGS.

(Step 1)
As shown in FIG. 3 (S1), the outer lead 6 of the inner tube 2 is cut from the lower end of the outer lead 6 at a position of L dimension. The L dimension is set such that the distance from the lower end of the cut external lead 6 to the optical center of the inner tube 2 (the position of the plus sign) is G1. The dimension G1 is set such that the optical center distance of the product becomes the specified value G0 after the product is completed (S6). The dimensions of the pinch seal portion 3 when viewed from the external lead 6 side are regulated by a four-way pinch seal machine.
(Step 2)
As shown in FIG. 3 (S2), the power feed lead 7 or the power feed lead 8 is connected to the pair of external leads 6 and 6 protruding from the pinch seal portion 3 of the inner tube 2, respectively.
(Step 3)
As shown in FIG. 3 (S 3), the inner tube 2 is inserted into the base 12 until the ends of the external leads 6, 6 of the inner tube 2 abut against the bottom surface 13 A of the insertion port 13. The power supply lead 7 close to the lamp central axis is passed through the eyelet 19 of the base 12, and the power supply lead 8 away from the lamp central axis is passed through the small hole of the base 12 to approach the end of the shell 20. Further, the inner tube support plate 2B is placed on the inner tube using the tip-off portion 2A of the inner tube 2, and the outer tube 11 is put on the inner tube and the base until the opening end of the inner tube 2 abuts against the flange portion 14A of the support column 14. At this time, the position of the outer tube 11 in the direction along the lamp axis is restricted by the flange portion 14A, and the position in the direction orthogonal to the lamp axis is restricted by the support column 14 having an outer diameter slightly smaller than the inner diameter of the outer tube 11. Has been. Further, the position of the inner tube 2 in the direction along the lamp axis is regulated by the bottom surface 13A, and the position in the direction perpendicular to the lamp axis is regulated by the insertion port 13 having a dimension slightly larger than the main part dimension of the pinch seal part 3. Has been. For this reason, the position of the center of the lamp light indicated by the plus sign in FIG. 3 does not need to be adjusted again and is at the specified position of the product. In addition, the external dimensions of the product are also as specified.
(Step 4)
As shown in FIG. 3 (S4), the ceramic adhesive 21 is discharged from the nozzle 31 of an adhesive dispenser (not shown), and the adhesive is attached from the adhesive inlet 15 to the area where it adheres to the pinch seal portion 3. Fill. At this time, if the base is fixed to be below the inner tube and the adhesive is injected, the adhesive adheres to the pinch seal portion 3 and then mainly into the gap below the adhesive injection port 15 in the gravity direction. It penetrates and spreads slightly above the adhesive inlet 15. Therefore, by defining the position of the adhesive injection port 15, it is possible to control which part of the pinch seal portion 3 is filled with the adhesive as described above. During the adhesive injection process, it is impossible to observe how the adhesive discharged from the nozzle 31 actually adheres to the pinch seal portion 3 and is filled. Repeat to set an appropriate injection volume.
(Step 5)
As shown in FIG. 3 (S5), an adhesive is injected between the groove 16 of the base 12 and the inner wall surface of the outer tube. Since the progress of the adhesive stops when it hits the weir 17 provided on the base 12, the adhesive does not protrude to the insertion opening side of the base and the appearance quality does not deteriorate. In the outer tube bonding step, it is preferable that the nozzle is pulled out more than in the inner tube bonding step and tilted so that the tip of the nozzle faces the outer tube opening. In the adhesive injection process to the outer tube, it is possible to adjust the injection amount by seeing how much adhesive is filled during the adhesive injection process, but in the mass production process, set an appropriate injection amount It is better to inject a fixed amount of adhesive. The remaining adhesive injection port 15 is similarly injected with an adhesive.
(Step 6)
As shown in FIG. 3 (S6), the adhesive is sufficiently dried and cured by, for example, holding the lamp after injecting the adhesive in the vertical direction with the base down and placing it in a drying furnace. The jig (not shown) for maintaining the lamp posture may be a jig that opens a hole for standing a base on a flat plate. If the drying temperature is about 100 ° C., the jig may be made of wood. In such a jig, the lamp cannot be kept perfectly vertical, but tilts several degrees from the vertical line. Since the drying process is performed after all the members are assembled, the drying process may be performed once. Thereafter, the power supply lead 7 is electrically connected to the eyelet 19, and the power supply lead 8 is electrically connected to the shell 20, thereby completing the triple tube one-piece lamp.

As described above, by adopting the technique of the present invention, it is possible to realize a one-piece lamp that does not deteriorate the appearance quality due to the protrusion of the adhesive without dividing the ceramic die into two members. In addition, it is not necessary to adjust the position of the center of the lamp light in a triple-tube single-cap lamp, and it can be manufactured in one drying by integrating the drying process of the inner tube adhesive and the drying process of the outer tube adhesive. There is an effect that the process can be simplified.

In the above-described embodiment, the triple-tube single-lamp lamp provided with the adhesive injection port in the direction orthogonal to the axis of the inner tube insertion port has been described, but the present invention introduces such an injection port or outer tube adhesive. A single-base lamp having a base without a groove can be similarly applied. When there is no injection port in the base, paste-like ceramic adhesive is applied to the surface of the inner wall of the insertion port which is the measurement standard of the opening dimension T1 in FIG. An adhesive is filled between the sealing surface and the inner wall of the insertion opening. If there is no groove for introducing the outer tube adhesive in the base, a paste-like ceramic adhesive may be applied to the outer wall of the base post, and the adhesive protruding from the outer tube after the outer tube is inserted may be wiped off. Unless the adhesive protrudes above the end face on the insertion opening side of the support column, the filling boundary surface of the adhesive is not conspicuous from the outside, and the aesthetic appearance as a single-piece base lamp is not impaired.

In addition to the shape shown in this embodiment, there are several types of base terminals in the market, but the present invention is ceramic (insulating refractory) regardless of the base terminal shape. It can be applied to a single cap lamp using a cap made of metal.

  The present invention can be applied to a single base lamp formed by bonding a ceramic base and an inner tube or a ceramic base and an inner tube and an outer tube with an adhesive.

DESCRIPTION OF SYMBOLS 1 Light emission tube 2 Inner tube 2A Tip-off part 2B Inner tube support plate 3 Pinch seal part 4 Internal lead 5 Molybdenum foil 6 External lead 7 Feed lead 8 Feed lead 11 Outer tube 12 Base 13 Insert port 13A Bottom face 14 Support column 14A Flange part 15 Adhesive inlet 16 Groove 17 Weir 18 Base terminal 19 Eyelet 20 Shell 21 Adhesive 31 Nozzle G0 Optical center of the product

Claims (3)

An inner tube containing an arc tube or a luminous filament and having an inner tube support plate attached thereto, an outer tube containing the inner tube, and a base for concentrically attaching them on the base end side;
The inner pipe is formed in the pinch seal part by hot pressing the base end side attached to the base,
The pinch seal portion has a molybdenum foil interposed between an internal lead that feeds power to the luminous tube or luminous filament and an external lead that is led out from the inner tube and connected to the cap terminal, and is welded to the molybdenum foil. Is a method of manufacturing a single-piece lamp that is hermetically sealed,
The base has a base terminal electrically connected to the socket at one end thereof,
An insertion port for inserting and fixing the pinch seal part of the inner pipe to the other end, a support supporting the inner wall surface of the opening of the outer pipe, and a flange part;
Pinch-sealing so that the width of the wide side and the thickness of the central part when the inner tube is viewed from the external lead side are regulated;
Cutting the external lead of the inner tube from the lower end of the pinch seal part at a position of a specified dimension;
Connecting a power supply lead to each of the pair of external leads;
Inserting the inner tube into the base until the end of the outer lead of the inner tube hits the bottom surface of the insertion port, and simultaneously filling the adhesive between the pinch seal portion and the inner wall of the insertion port;
Covering the inner tube and the base until the opening end of the outer tube abuts against the flange portion of the column, and simultaneously filling the adhesive between the column and the inner wall of the opening end of the outer tube;
And a step of simultaneously drying and curing an adhesive that bonds the base to the inner tube and the outer tube. An inner tube containing an arc tube or a luminous filament and having an inner tube support plate attached thereto, an outer tube containing the inner tube, and a base for concentrically attaching them on the base end side;
The inner pipe is formed in the pinch seal part by hot pressing the base end side attached to the base,
The pinch seal portion has a molybdenum foil interposed between an internal lead that feeds power to the luminous tube or luminous filament and an external lead that is led out from the inner tube and connected to the cap terminal, and is welded to the molybdenum foil. Is a method of manufacturing a single-piece lamp that is hermetically sealed,
The base has a base terminal electrically connected to the socket at one end thereof,
An insertion port for inserting and fixing the pinch seal portion of the inner tube to the other end and a column supporting the inner wall surface of the opening of the outer tube;
The insertion port has a bottom surface that is a flat surface except for a hole through which the feed lead is passed,
The wide side dimension W1 of the insertion opening and the dimension T1 of the opening central part orthogonal to the wide side are slightly smaller than the wide side dimension W and the central part thickness T of the pinch seal part when the inner tube is viewed from the external lead side. Is set to a large dimension,
The support column is provided with a flange portion having an outer diameter slightly smaller than the inner diameter of the opening end portion of the outer tube and having an outer diameter sufficiently larger than the inner diameter of the opening end portion of the outer tube,
An adhesive injection port in a direction perpendicular to the axis of the insertion port;
The adhesive injection port is formed through at a position corresponding to the pinch seal portion of the inner tube,
A groove that guides the adhesive from the adhesive injection port to the outer tube and the base is formed at the outer end of the adhesive injection port,
A dam for blocking the flow of the adhesive is provided at the end of the groove,
Pinch-sealing so that the width of the wide side and the thickness of the central part when the inner tube is viewed from the external lead side are regulated;
Cutting the outer lead of the inner tube from the lower end of the pinch seal part at the position of the specified dimension;
Connecting each of the power supply leads to a pair of external leads coming out of the pinch seal portion of the inner tube;
Inserting the inner tube into the base until the end of the outer lead of the inner tube hits the bottom surface of the insertion port;
Covering the outer tube with the inner tube and the base until the open end of the outer tube hits the flange of the column;
Filling the adhesive from the adhesive inlet to the region attached to the pinch seal portion 3;
Injecting an adhesive between the groove of the base and the inner wall surface of the outer tube;
And a step of simultaneously drying and curing an adhesive that bonds the base to the inner tube and the outer tube.
An inner tube containing an arc tube or a luminous filament and having an inner tube support plate attached thereto, an outer tube containing the inner tube, and a base for concentrically attaching them on the base end side;
The inner tube is a one-piece base lamp formed in a pinch seal part by being hot-pressed so that the base end side attached to the base is regulated in four directions.
The base has a base terminal electrically connected to the socket at one end thereof,
An insertion port for inserting and fixing the pinch seal part of the inner pipe to the other end, a support supporting the inner wall surface of the opening part of the outer pipe, and a flange part contacting the opening end of the outer pipe,
A groove for guiding the adhesive between the outer tube and the base is formed on the outside of the support column, and a weir for blocking the flow of the adhesive is provided at the end of the groove,
The insertion port has a bottom surface that is a flat surface except for a hole through which the feed lead is passed,
The wide side dimension W1 of the insertion opening and the dimension T1 of the opening central part orthogonal to the wide side are slightly smaller than the wide side dimension W and the central part thickness T of the pinch seal part when the inner tube is viewed from the external lead side. Is set to a large dimension,
The adhesive is filled and filled in a gap between the pinch seal portion and the inner wall of the insertion port, and is adhered and filled in a gap between the groove and the inner wall of the outer tube.