JP2014099259A - Lamp unit with base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure in which a plurality of feeders can be led out in a direction orthogonal with lamps without interfering with each other and a full length of a lamp unit with a base can be shortened, in the lamp unit in which a plurality of bar-shaped lamps are disposed in parallel by fitting encapsulation parts of the bar-shaped lamps into a plurality of encapsulation part insertion holes provided in the common base, external leads protruding from the encapsulation parts are connected to the feeders, respectively, within a welding hole which is formed while penetrating the base.SOLUTION: In the base, a feeder lead-out hole is formed which is orthogonal with a length direction of the bar-shaped lamps, the feeders are led out in the same direction, and the plurality of encapsulation part insertion holes are provided while being displaced from each other in a penetrating direction of the welding hole.

Description

  The present invention relates to a lamp unit with a base comprising a plurality of rod-shaped lamps, and more particularly to a lamp unit with a base formed by welding a power supply line to an external lead of the lamp within the base.

Conventionally, in a filament lamp used as a heat source for fixing toner in a copying machine, a laser beam printer, etc., an internal lead at both ends of the filament and an external lead led out of the arc tube to the metal foil in the sealing portion at both ends A pinch seal that is connected to a lead is generally used, and a sealing portion by the pinch seal is held by a base.
A lamp unit including a plurality of lamps is used to increase the output, and as seen in Japanese Patent Application Laid-Open No. 2004-311220 (Patent Document 1), a single base in which the plurality of lamps are shared. A structure to be attached to is known.

FIG. 8 shows the entire structure, and FIG. 9 shows the partially enlarged structure.
In FIG. 8, the lamp unit with a base includes two lamps 10a and 10b. Hereinafter, these are collectively referred to as a lamp 10, and each component will be described in the same manner.
The rod-shaped lamp 10 has sealing portions 12 formed at both ends of a long arc tube 11 made of quartz glass, and a filament 14 is arranged inside the arc tube 11 so as to coincide with the tube axis. .
A metal foil 13 is embedded in the sealing portions 12 at both ends of the arc tube 11 and led out to the outside of the arc tube 11 with internal leads 15 connected to the ends of the filament 14. External leads 16 are connected to the metal foil 13 by welding, respectively.
The sealing structure is sealed by a so-called pinch seal in which the metal foil 13, the internal lead 15 and the external lead 16 are disposed in the sealing portion 12, and the sealing portion is heated and melted and crushed by applying pressure from the outside. Is formed.

As shown in detail in FIG. 9, these two lamps 10 (10 a, 10 b) are held by one common base 20. The base 20 has a sealing portion insertion hole 21 for receiving the sealing portion 12 of the lamp 10, and the lamp 10 is positioned by inserting the sealing portion 12 into the sealing portion insertion hole 21. Being held.
Further, a welding hole 22 is formed through the base 20 so as to be orthogonal to the sealing portion insertion hole 21 (perpendicular to the paper surface), and from the sealing portion 12 within the welding hole 22. The protruding external lead 16 is welded to the connection terminal 18.
On the other hand, a feed line lead-out hole 23 is formed in the base 20 so as to be coaxial with the sealing portion insertion 21, and the feed line 17 is inserted from the feed line lead-out hole 23, and its tip is inside the weld hole 22. The connection terminal 18 is connected.
As a result, the electrical connection of the feeder line 17 -the connection terminal 18 -the external lead 16 -the metal foil 13 -the internal lead 15 -the filament 14 is made.

By the way, according to the above prior art, since the power supply line 17 is led out from the base 20 in the longitudinal direction coaxially with the lamp 10, the total length of the lamp unit becomes large, and the heat roller has recently been downsized. It did not meet the request of.
In response to such a demand, Japanese Patent Application Laid-Open No. 2006-302522 (Patent Document 2) discloses a technique for deriving a feeder line in a direction orthogonal to the longitudinal direction of the lamp.

However, the thing of this patent document 2 respond | corresponds to one lamp, Even if it tries to apply this to the lamp unit provided with the two lamps of said patent document 1 as it is, it derives | leads-out in the orthogonal direction. The two power supply lines thus interfere with each other, and cannot be welded, and furthermore, cannot be derived from the base.
Moreover, in a lamp unit with a base in which a plurality of, for example, two lamps are arranged close to each other, the lamp is used as a heat source. Therefore, the number of lamps to be lit and the feeding current can be individually adjusted according to the required amount of heat. Yes.
For this reason, there are as many external leads as the number of lamps inside the base, and the number of power supply lines is also wired within the base, so that the above-mentioned interference of wiring becomes more problematic and independent power supply. For this reason, there is a complication that it is necessary to maintain an insulation state between the external leads and between the power supply lines.
In that sense as well, there is a problem that the technique described in Patent Document 2 cannot be simply applied, and the base part is enlarged depending on the direction in which the feeder line is derived.

JP 2004-311220 A JP 2006-302522 A

  Sealing portions of a plurality of rod-shaped lamps are fitted into a plurality of sealing portion insertion holes provided in a common base so that the rod-shaped lamps are arranged in parallel, and external leads protruding from the sealing portions In a lamp unit with a base that is connected to a power supply line inside each welding hole formed through the base, the power supply line is arranged in the longitudinal direction of the lamp while maintaining an independent power supply state to each lamp. It is to provide a structure that does not interfere with each of the power supply lines and does not interfere with the welding of the power supply line and the external lead.

  In order to solve the above-mentioned problems, in the lamp unit with a base according to the present invention, the base is formed with a feed line lead-out hole orthogonal to the longitudinal direction of the rod-shaped lamp, and the feed line is led out in the same direction. The plurality of sealing portion insertion holes are provided so as to be displaced from each other in the penetration direction of the welding hole.

Further, in the rod lamp positioned above in the penetration direction of the welding hole, the power supply line is connected on the upper side of the external lead, and in the rod lamp positioned below, on the lower side of the external lead. The power supply line is connected.
In addition, the feeder lead hole is a common lead hole.
Further, the feed line lead-out holes are a plurality of lead-out holes corresponding to the external leads of the rod-shaped lamp.

According to this invention, since the sealing portion insertion holes provided in the common base are displaced from each other in the penetration direction of the welding holes, the feeding lines to the lamps do not interfere with each other and are orthogonal to the longitudinal direction of the lamps. In addition, in the welding process of each power supply line and the external lead, the other power supply lines do not get in the way, and work can be performed sequentially without any trouble.
Accordingly, in a lamp unit with a base having a plurality of lamps, a realistic problem is that the feeder line is led out in a direction orthogonal to the longitudinal direction of the lamp, and the length in the longitudinal direction of the lamp unit is shortened and miniaturized. Will be solved.

The whole perspective view of the lamp unit with a base of this invention. The partial expansion perspective view which removed the base of FIG. The perspective view which changed the angle of FIG. The perspective view showing only the base of this invention. (A) is an AA arrow sectional view of FIG. 4, (B) is a BB arrow sectional view, (C) is a CC arrow sectional view. Explanatory drawing of a welding process of a feeder and an external lead. Explanatory drawing of the welding process in the base structure by another Example. FIG. The partial expanded sectional view of FIG.

FIG. 1 is an overall perspective view of a lamp unit with a base according to the present invention. Two lamps 10a and 10b (hereinafter sometimes collectively referred to as lamps 10) are held by a common base 1 and 1. ing. The lamps 10a and 10b are connected to power supply lines 17a and 17b in the base 1, respectively.
2 and 3 are perspective views in which the base 1 in FIG. 1 is removed, and FIG. 3 is a perspective view as seen at a different angle from FIG.
2 and 3, each of the lamps 10a and 10b is displaced in the height direction and is held. A power supply line 17a is provided above the external lead 16a of the lamp 10a located above, and a connecting terminal at the tip. 19a is connected.
Similarly, a power supply line 17b is connected to the external lead 16b of the lower lamp 10b on the lower side via a connection terminal 19b at the tip.
By adopting such an arrangement, the feeder lines 17a and 17b are displaced in the vertical direction so that they do not interfere with each other. Further, the upper power supply line 17a is connected to the upper side of the external lead 16a of the lamp 10a, and the lower power supply line 17b is connected to the lower side of the external lead 16b of the lamp 10b. An amount can be made small and the enlargement of the base 1 mentioned later can be suppressed.

A base structure that provides an arrangement structure of the lamps 10a and 10b and the feeder lines 17a and 17b as described above is shown in FIGS.
4 is a perspective view of only the base, FIG. 5 (A) is a cross-sectional view taken along arrow AA in FIG. 4, (B) is a cross-sectional view taken along arrow BB, and (C) is a cross-sectional view taken along arrow CC. FIG.
4 and 5, the base 1 is made of, for example, ceramic, and the shape thereof is basically a rectangular parallelepiped shape. The one surface 1a has two sealing portion insertion holes 2a and 2b opened on the surface 1a. Is formed. The sealing portion insertion holes 2a and 2b are displaced from each other in the height direction.
A feed line outlet hole 3 is formed in a surface 1b orthogonal to this surface. That is, the feeder lead-out hole 3 is formed in a direction orthogonal to the sealing portion insertion holes 2a and 2b. The sealing portion introduction ports 2 a and 2 b communicate with the feeder line lead-out hole 3.

In addition, two welding holes 4 a and 4 b are formed in the surface 1 c orthogonal to these surfaces 1 a and 1 b so as to penetrate the base 1. In other words, the weld holes 4 a and 4 b are formed orthogonal to the sealing portion insertion holes 2 a and 2 b and also orthogonal to the feed line lead-out hole 3. The weld holes 4a and 4b communicate with the feed line lead-out hole 3, and pass through the base 1 so that the hole axes thereof are located substantially on the axial lines of the sealing portion insertion holes 2a and 2b, respectively. ing. Here, “substantially on the axial center line” means such a positional relationship that the work can be performed when the external lead 16 and the power supply line 17 are welded in the weld holes 4a and 4b.
With this configuration, the sealing portion insertion holes 2a and 2b are displaced vertically in the axial direction of the welding holes 4a and 4b.

A state where the lamp sealing portion 12 is inserted into the base 1 is shown in FIG. 6 shows a positional relationship corresponding to FIG. 5C, which is a cross-sectional view taken along the line CC in FIG.
The sealing portions 12a and 12b inserted into the respective sealing portion insertion holes 2a and 2b are positioned so as to have different heights. Then, power supply lines 17a and 17b are connected to the sealing portions 12a and 12b by welding.
The welding process will be described.
First, the feed line 17a is inserted into the feed line lead-out hole 3 with respect to the external lead 16a of the sealing portion 12a at a high position on the near side of the feed line lead-out hole 3, and the feed terminal 19a at the tip thereof is connected to the external lead 16a. These are welded and connected by a welding jig inserted from above and below into the welding hole 4a.
Next, the feed line 17b is inserted into the feed line lead-out hole 3 with respect to the external lead 16b of the sealing portion 12b at the lower position on the back side of the feed line lead-out hole 3, and the feed terminal 19b at the tip thereof is connected to the external lead 16b. These are welded and connected by a welding jig that is in contact with the lower side and is inserted into the welding hole 4b from above and below.

During the series of welding operations, when the power supply line 17a is welded to the higher sealing portion 12a on the near side, the other power supply line 17b is not present, so that the operation is not hindered, and the lower side is low. Even when the power supply line 17b is welded to the sealing portion 12b, the power supply line 17a does not exist at the welding position, so that the operation is not hindered.
With such an arrangement structure, the feed lines 17a and 17b led out from the base 1 are displaced in the height direction, so that they do not interfere with each other and are led out smoothly.
Note that the near-side sealing portion 12a located on the opening side in the feed line leading direction is assumed to be located above in the height direction. However, the present invention is not limited to this, and the near-side sealing portion 12a is located on the lower side. The sealing part 12b on the back side of the electric wire outlet hole 3 may be located above. The welding work procedure in this case is also such that the lower sealing portion 12a on the near side and the feeder line 17a are welded first, and the higher sealing portion 12b on the far side and the feeder line 17b are later welded. The power supply line does not get in the way during welding.
That is, regardless of the height, first, the feeder 17a is welded to the sealing portion 12a located on the front side of the feeder lead-out hole 3, and then the sealing portion 12b located on the back side is welded. On the other hand, the power supply line 17b may be welded.

In addition, although the feed line lead-out hole 3 is a single common lead-out hole, as shown in FIG. 7, two lead-out holes 3a and 3b corresponding to the respective sealing portions 12a and 12b may be used. Also in this case, the feeding directions of the feeder lines 17a and 17b are the same.
Also, the welding hole 4 may be a common welding hole.
Furthermore, the number of lamps is not limited to two, and may be three or more. In this case as well, the position of the sealing portion insertion hole of each lamp is shifted in the height direction, and the feed line lead-out direction In this case, the welding operation may be sequentially performed from the sealing portion on the near side to the sealing portion on the back side.

  As described above, according to the present invention, a plurality of rod-shaped lamps are held by a common base, and the base is provided with a feeder lead hole that is perpendicular to the longitudinal direction of the rod-shaped lamps. The electric wires are led out in the same direction, and the plurality of sealing portion insertion holes are arranged so as to be displaced from each other in the penetration direction of the welding holes, thereby interfering with the plurality of feeding lines. Therefore, it is possible to provide a lamp unit that meets the demands for downsizing the apparatus to be incorporated without increasing the overall length of the lamp unit.

1 Base 2 Sealing part insertion hole (2a, 2b)
3 Feeding line outlet holes (3a, 3b)
4 Weld holes (4a, 4b)
10 Bar lamp (10a, 10b)
12 Sealing part (12a, 12b)
16 External lead (16a, 16b)
17 Feed line (17a, 17b)
19 Connection terminal (19a, 19b)

Claims (4)

A plurality of rod-shaped lamp sealing portions are fitted in a plurality of sealing portion insertion holes provided in a common base, and the rod-shaped lamps are arranged in parallel.
In the lamp unit with a base formed by connecting each of the external leads protruding from the sealing portion to a power supply line inside the weld hole formed through the base,
In the base, a feed line lead-out hole perpendicular to the longitudinal direction of the rod-shaped lamp is formed, and the feed line is led out in the same direction,
The lamp unit with a base, wherein the plurality of sealing portion insertion holes are displaced from each other in a penetration direction of the welding hole.   In the rod lamp located above in the penetration direction of the weld hole, the power supply line is connected on the upper side of the external lead, and in the rod lamp located on the lower side, the power supply is provided on the lower side of the external lead. The lamp unit with a base according to claim 1, wherein an electric wire is connected.   The lamp unit with a base according to claim 1, wherein the feeder lead-out hole is a common lead-out hole. 3. The lamp unit with a base according to claim 1, wherein the feeder lead-out holes are a plurality of lead-out holes corresponding to the external leads of the rod-shaped lamp.

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