JP2007335386A - Terminal of heater lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal easy to be mounted and the terminal mounted is securely fixed to a carbon body. <P>SOLUTION: A terminal 3 is constituted of a metal cylinder 30, two or more claws 31 extending along the outer circumference of the metal cylinder 30, and a cylinder 33 which is fitted to the claw 31. A carbon coil body 2 is placed on the metal cylinder 30. The claw 31 is pressed so that at least one roll of the carbon coil body 2 is pinched by the claw 31 and an outer surface of the metal cylinder 30, and the terminal 3 is mounted to both sides of the carbon coil body 2 by fitting the cylinder 33 to the claw 31. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a terminal of a heater lamp, and more particularly to a terminal of a heater lamp in which a carbon fiber yarn is wound up in a coil shape as a heating element.

Conventionally, as a heating element of a heater lamp, one using rod-like solid carbon or one using felt-like carbon is known.
In either case, solid carbon or felt-like carbon is inserted into the quartz glass tube, the quartz glass tube is crimped and sealed at the terminal portions at both ends, and the solid carbon or felt-like carbon is heated by conduction to the terminal portions. (Patent Documents 1 and 2).
These terminals are configured by winding a coiled wire around both ends of solid carbon, or by embedding part of a lead bar at both ends of felt-like carbon.
JP 2001-35638 A JP 2002-170653 A

  However, those using solid carbon are not flexible, and there is a problem that heater lamps of various shapes other than straight tubes cannot be manufactured. In addition, the heat distribution is uneven and accurate temperature control is difficult, and there is a problem in that even if the same specifications are used, there is a power difference in the characteristics.

In view of these problems, the present applicant twisted a plurality of carbon fiber yarns into a carbon body, and formed a heating element by forming the carbon body into a coil shape to form a heating element. A patent application was filed on
The present invention relates to an improvement of a terminal of a heater lamp according to the patent application, and an object thereof is to make it easy to attach the terminal and to securely fix the attached terminal to the carbon body.

  In order to achieve the above object, the terminal of the heater lamp of the present invention is a terminal of a carbon coil body obtained by winding a twisted yarn obtained by twisting a plurality of carbon fiber yarns into a coil shape, and a metal cylinder, It comprises two or more claw pieces extending along the outer periphery of the metal cylinder, and a cylinder or a ring-shaped member fitted on the claw piece, the carbon coil body is mounted on the metal cylinder, At least one roll is sandwiched and fixed between the claw piece and the outer peripheral surface of the metal cylinder.

  The terminal of the heater lamp of the present invention is a terminal of a carbon coil body obtained by winding a twisted yarn obtained by twisting a plurality of carbon fiber yarns into a coil shape, and a metal cylinder and a bimetal extending along the outer periphery of the metal cylinder The carbon coil body is mounted on the metal cylinder, and at least one turn of the carbon coil body is sandwiched and fixed between the claw piece and the outer peripheral surface of the metal cylinder, The claw piece is configured to be deformed in a direction in which the carbon coil body is further sandwiched according to a temperature rise.

  The carbon coil body is wound around a rod-shaped glass body, and a metal cylinder on which the carbon coil body is mounted is interposed between the rod-shaped glass body and the carbon coil body.

  According to the terminal of the above configuration, since the carbon coil body is fixed to the metal cylinder by sandwiching at least one turn of the carbon coil body between the claw piece and the outer peripheral surface of the metal cylinder, the terminal is easy to install and the inner side during heat generation As the metal cylinder expands, the carbon coil body is firmly pressed against the claw piece, so that the attached terminal is securely fixed to the carbon coil body.

  Embodiments according to the present invention will be described below with reference to the drawings.

<A> Heater lamp The heater lamp 1 includes a coiled carbon coil body (heating element) 2, left and right terminals 3, and a quartz glass tube 4 enclosing them (see FIG. 3).
As shown in FIG. 1, the carbon coil body 2 is formed by bundling a number of PAN-based carbon fiber strands 21 made of, for example, polyacrylonitrile as a carbon fiber yarn 22 and twisting a plurality of the carbon fiber yarns 22 together. Is wound up in a coil shape.

<B> Terminal The terminal 3 includes a conductive metal cylinder 30, two or more claw pieces 31 extending along the outside of the metal cylinder 30, a cylinder 33 fitted to the claw piece 31, and an internal lead wire extending from the metal cylinder 30. 34 (see FIGS. 1 and 2).
In order to attach the terminal 3 to the carbon coil body 2, first, the metal cylinder 30 is inserted inside one end of the carbon coil body 2 so that at least one turn of the carbon coil body 2 is attached to the outer periphery of the metal cylinder 30.
Next, the claw piece 31 is pressed against the outer side of the carbon coil body 2 so that the carbon coil body 2 is sandwiched between the claw piece 31 and the outer peripheral surface of the metal cylinder 30, and the claw piece 31 has a cylinder 33 to prevent it from bouncing back. To complete the installation.
A state in which the terminal 3 is attached to one end of the carbon coil body 2 in this way is shown in FIG. 2A (in the figure, two to three turns of the carbon coil body 2 are sandwiched).
The terminals 3 are attached to the left and right ends of the carbon coil body 2.

In this example, four claw pieces 31 are provided, and the tip 31a is bent outward so that the carbon coil body 2 can be easily attached.
When the cylinder 33 is fitted, it is preferable to fix the position by inserting the projection 33a of the cylinder 33 into the slit 30a of the metal cylinder 30 as shown in the figure. However, a ring-shaped member such as the cylinder 33 or a ring is simply used. It may be simply fitted to the claw piece 31.
Further, the claw piece 31 may be bent along the outer edge of the carbon coil body 2, and in this case, when the carbon coil body 2 is sandwiched, it can be attached closely (see FIG. 2B).
The internal lead wire 34 is bent so as to substantially coincide with the axis of the metal cylinder 30, and the tip thereof is spot welded to the molybdenum foil 35.
Further, a slit 32 is provided in the axial direction of the metal cylinder 30 so as to absorb thermal deformation of the metal cylinder 30 due to thermal expansion or to absorb elastic deformation of the metal cylinder 30 when the claw piece 31 is strongly pressed. It has become.

  Such a terminal 3 can be manufactured from one metal plate by press working or the like. For example, the metal plate 30 is punched into a shape as shown in FIG. 4A, and this is shown in FIG. 4B. By rolling in this manner, the metal cylinder 30, the claw piece 31, the slit 32, and the internal lead wire 34 are formed.

The claw piece 31 may be formed of a bimetal obtained by bonding two metal plates 31b and 31c having different thermal expansion coefficients (see FIG. 2C).
By using a metal plate 31b such as Invar having a small thermal expansion coefficient on the inner side of the claw piece 31, that is, the side in contact with the carbon coil body 2, a metal plate having a large thermal expansion coefficient in accordance with the temperature rise during the carbon lamp operation Since 31c extends more, it bends to the metal plate 31b side, and the claw piece 31 clamps the carbon coil body 2 more strongly.

<C> Quartz glass tube The quartz glass tube 4 is a sealed container for enclosing the carbon coil body 2 in a vacuum state or in an inert gas atmosphere.
The quartz glass tube 4 is formed in a cylindrical shape and is large enough to accommodate the carbon coil body 2 therein.
Since the carbon coil body 2 is flexible and can be deformed, it can be inserted along various shapes of the quartz glass tube 4. For example, the quartz glass tube 4 is bent to form an annular shape (horse-shoe shape, elliptical shape, circular shape). , Omega type, etc.), and a carbon coil body 2 is inserted into the bent quartz glass tube 4 to form heater lamps 1 of various shapes.

<D> Production of heater lamp First, a plurality of carbon fiber yarns 22 are twisted and immersed in a liquid resin and cured, and then coiled to produce a carbon coil body 2 having a predetermined coil diameter and coil length. .
Further, as shown in FIG. 4B, a metal cylinder 30 having a claw piece 31, a slit 32, a slit 30a and an internal lead wire 34 is prepared.
As described above, both ends of the carbon coil body 2 are attached to the metal cylinder 30, the carbon coil body 2 is sandwiched between the nail pieces 31, and the cylinder 33 is fitted to attach the terminals 3 to the left and right ends of the carbon coil body 2. .
The tip of the internal lead wire 34 is spot welded to the molybdenum foil 35, and the external lead wire 36 is spot welded to the molybdenum foil 35.

The carbon coil body 2 having the terminals 3 attached to the left and right ends as described above is inserted into the quartz glass tube 4 which is open at both ends, both ends of the quartz glass tube 4 are heated and pressed, and the pressure sealing 41 is performed at the location of the molybdenum foil 35. Thus, the straight tubular heater lamp 1 is manufactured (see FIG. 3).
Since the carbon coil body 2 burns when it generates heat in the air, the carbon coil body 2 is accommodated in a state where the inside of the quartz glass tube 4 is evacuated, or the inside of the quartz glass tube 4 is filled with an inert gas. Replace.

<E> Action When the heater lamp 1 having the terminals 3 attached to both ends is energized, current is supplied to the carbon coil body 2 via the external lead wire 36, the molybdenum foil 35, the internal lead wire 34, the metal cylinder 30, and the claw piece 31. The carbon coil body 2 generates heat.
The inner metal cylinder 30 is thermally expanded during heat generation, and the carbon coil body 2 is pressed toward the claw piece 31 while the slit 32 is expanded to securely fix the terminal 3.
Since the carbon coil body 2 is made of a twisted yarn in which a plurality of carbon fiber yarns 22 are twisted together, a current flows uniformly through the carbon coil body 2 and a high heat generation efficiency is obtained uniformly over the entire surface.

  Next, another embodiment of the present invention will be described with reference to FIG.

In this example, a carbon coil body 2 is wound around the surface of an elongated rod-shaped glass body 5 to form a heating element, a metal cylinder 30 is inserted between the carbon coil body 2 and the rod-shaped glass body 5 at both ends thereof, and a nail piece 31, and a cylinder 33 is fitted to the claw piece 31, and at least one turn (2 to 3 turns in the figure) of the carbon coil body 2 is sandwiched between the claw piece 31 and the outer peripheral surface of the metal cylinder 30 to connect the terminal 3. It is composed.
The heating element having the terminals 3 attached to the left and right ends in this manner is inserted into the quartz glass tube 4 that is open at both ends, and the quartz glass tube 4 is thermocompression-bonded 41 at the location of the molybdenum foil 35 to incorporate the carbon coil body 2. The heater lamp 1c is manufactured.
When the rod-shaped glass body 5 is used, the carbon coil body 2 can be arranged at the center of the quartz glass tube 4, and the carbon coil body 2 comes into contact with the inside of the quartz glass tube 4. There is no problem such as a local rise in temperature.

The disassembled perspective view of the terminal part of a carbon coil body. Sectional drawing which shows the state in which the terminal was attached to the carbon coil body. Schematic which shows the heater lamp which enclosed the carbon coil body in the quartz glass tube. It is a figure which shows a terminal, (A) is the figure which expanded the terminal, (B) is a perspective view of a terminal. Schematic which shows the heater lamp which enclosed other carbon coil bodies in the quartz glass tube.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heater lamp 2 ... Carbon coil body 3 ... Terminal 30 ... Metal cylinder 31 ... Claw piece 33 ... Cylinder 34 ... Internal lead wire 35 ... Molybdenum Foil 36 ... External lead wire 4 ... Quartz glass tube 5 ... Rod glass body

Claims (3)

A terminal of a carbon coil body obtained by winding a twisted yarn obtained by twisting a plurality of carbon fiber yarns into a coil shape,
A metal cylinder,
Two or more claw pieces extending along the outer periphery of the metal cylinder;
A cylindrical or ring-shaped member fitted to the claw piece,
Attaching the carbon coil body to the metal cylinder,
A terminal of a heater lamp, wherein at least one turn of the carbon coil body is sandwiched and fixed between the claw piece and the outer peripheral surface of the metal cylinder. A terminal of a carbon coil body obtained by winding a twisted yarn obtained by twisting a plurality of carbon fiber yarns into a coil shape,
A metal cylinder,
And two or more claw pieces made of bimetal extending along the outer periphery of the metal cylinder,
Attaching the carbon coil body to the metal cylinder,
At least one turn of the carbon coil body is sandwiched and fixed between the claw piece and the outer peripheral surface of the metal cylinder, and the claw piece is deformed in a direction to sandwich the carbon coil body more in response to a temperature rise. A terminal of a heater lamp, characterized by that. In the terminal of the heater lamp according to claim 1 or claim 2,
Constructed by winding the carbon coil body around a rod-shaped glass body,
A terminal for a heater lamp, wherein a metal cylinder to which the carbon coil body is mounted is interposed between the carbon coil body and a rod-shaped glass body.

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