JPS5913810B2 - Reed switch contact gap setting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contact gap setting device for manufacturing reed switches.

・ Conventionally, this type of device has been integrated with the reed switch's encapsulation device, mechanically holding and magnetizing one reed piece, attracting and holding the other reed piece with an appropriate amount of overlap, and magnetizing it. After heating and sealing the glass tube on one end of the attracted lead and demagnetizing the lead piece, the mechanically held lead piece is moved in a direction perpendicular to the contact surface to set a gap, and the glass tube on the other end is sealed. It was a device for heat sealing.

However, when such a conventional device is used, the gap setting device is built into the coverslipping equipment, which makes the device complicated and increases equipment costs.Furthermore, since the coverslipping process and the gap setting process are combined, There are many variations in the gap setting amount, and contact gap adjustment is required, resulting in poor gap setting yield for reed switches.

In addition, a fairly large coil is required to demagnetize the reed pieces, and it is impossible to arrange the reed pieces in a straight line or in a single plane for batch processing, resulting in poor productivity. there were.

An object of the present invention is to provide a contact gap setting device that can simultaneously and uniformly set the contact gaps of a plurality of reed switches sealed in a state where the contact gear is zero, without complicating the device configuration. It is about providing.

The contact gap setting device for a reed switch according to the present invention includes a plurality of reed switches with a zero contact gap, each of which has a first reed piece sealed at one end of an elongated glass tube and a second reed piece sealed at the other end. a face plate, and a face plate having first and second leads that are arranged opposite to each other and abutting the outer wall of the glass tube near the first lead piece sealing part and the second lead piece sealing part, respectively; first and second holding pieces arranged opposite to individually press the glass tubes of the reed switch and move the first and second pieces forward and backward at an angle of inclination with respect to the face plate, respectively; moving the face plate and the holding piece in a direction perpendicular to the contact surface of the glass tube of the reed switch of the face plate and in a direction perpendicular to the contact surfaces of the first and second reed pieces of the reed switch; a heater that heats a predetermined portion of the glass tube of the reed switch that is exposed from the first face plate and the holding piece and the second face plate and the holding piece, which are arranged opposite to each other, by irradiating heat rays in a concentrated manner; It is characterized by comprising:

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial sectional view showing the basic arrangement of a contact gap setting device for a reed switch according to the present invention.

In the figure, reference numeral 8 denotes two similarly configured hot-ray concentrating heaters in the lamp 4 and the ellipsoidal reflector 5, which are placed in symmetrical positions with respect to the reed switch.

The heat rays emitted from the lamp 4 placed at the first focus of the heater are reflected by the ellipsoidal reflecting mirror 5, and are held firmly by the upper holding part 3 and the lower holding part 2, which are constituted by a face plate and holding pieces. They are concentrated at the center of the reed switch 1 as shown by the two-dot chain line in the figure.

By rotating the fine adjustment screw 7, the lower holding part 2 moves above the base guide 6 relative to the upper holding part fixed to the base guide 6.

These constitute the hot ray concentration gap setting device for a reed switch according to the present invention.

FIG. 2 is a partially sectional perspective view showing an embodiment of a reed switch contact gap setting device according to the present invention having the basic configuration shown in FIG. 1, and FIG. 3 shows a reed switch holding part. FIG.

The upper and lower holding parts of the reed switch 1 each include a face plate 9, a holding piece guide block 10, a plurality of holding pieces 11, a holding piece pull plate 12, a screw 13, a holding piece guide plate 14, a spring 15, and a holding piece. Single pull block 16
It is made up of.

The face plate 9 of the upper holding part is fixed to a connecting block 16 fixed to a gap setting base 17.

By loosening the screws 13 in both the upper and lower holding parts, a large number of holding pieces 11 are guided by the tapered surface of the holding piece guide block 10 and the holding piece guide plate 14 by the force of the springs 15 attached to each piece. Move the glass tubes of multiple reed switches individually to the face plate 9.
Discipline.

A taper block 18 is fixed to the holding piece guide block 10 of the lower holding part, and is pressed against the slide taper block 19 by a spring attached to a hexagon socket head screw 21, so that it is guided by the guide groove of the gap setting base 17 and slides. The movement of the slide taper block 19 is converted into the vertical direction.

Two similarly configured hot-ray concentrators 8, placed symmetrically with respect to the fixed reed switch, were attached to the ellipsoidal reflector 5 and the first focal point of the ellipsoidal reflector 5. The heater base has a lamp 4 and is positioned so that the heat rays emitted from the lamp 4 are concentrated on a predetermined part of the exposed part of the glass tube arranged and fixed between the upper holding part and the lower holding part arranged oppositely. It is fixed at 20.

Gap setting by this device is performed as follows.

The contact surfaces of the first and second reed pieces of the reed switch sealed in a state of zero contact gear by an enclosing device (not shown) are parallel to the face plate 9, and a large number of reed switches are attached to each holding piece. 11, the screws 13 are loosened, and the glass tube surfaces near the sealing part of the reed switch are individually fixed together with the face plate 9 and the holding pieces 11.

Next, the lamp 4 is turned on to heat a predetermined position on the glass tube, and when the glass tube softens, the slide taper block 19 is immediately moved to move the lower holding part in a direction perpendicular to the contact surface. The glass tube held by the upper holding part and the lower holding part is moved in parallel and bent between the upper and lower holding parts, and at the same time a gap is set between the partner reed pieces of the multiple reed switches.

Alternatively, if the movable part is moved by the required contact gap amount in advance and the glass tube is held and heated in the same manner as described above, the holding piece 11 bends the glass tube as it softens with the force of the spring 15. is pressed against the face plate 9 to set the gap.

Although one embodiment of the present invention has been described above, it is of course merely an example and is not meant to be limiting.

For example, in this embodiment, two similarly constructed heaters 8 are used, but one heater is used, and the second focal point of the heater is centered instead of the other heater. Even if an arcuate reflector is used to reflect and concentrate the heat rays that have escaped without being absorbed by the glass tube, the heating power will be correspondingly weaker, but at the same time, the above-mentioned effects of the present invention can be obtained.

As explained above, according to the present invention, the glass tubes of a plurality of reed switches sealed in a contact gear are heated and softened by a hot wire concentrated heater, and the first and second reed pieces of the plurality of reed switches are sealed. The face plate and the first glass tube are arranged oppositely to hold each glass tube near the stop.
By moving one of the holding piece, the second face plate, and the second holding piece in a direction perpendicular to the contact surface of the reed piece, the glass tubes of a plurality of reed switches can be simultaneously and uniformly moved. By bending to set the contact gap, the contact gap setting yield can be improved and productivity can be significantly improved.

Further, according to the present invention, the configuration can be simplified by using a dedicated device configuration for setting a contact gap for a reed switch in which a lead piece is sealed into a glass tube using an enclosing device.

Further, according to the present invention, the outer wall of the glass tube near the first reed piece sealing portion of the reed switch is connected to the first face plate and the first reed piece.
By holding the outer wall of the glass tube in the vicinity of the sealing part of the second lead piece with the face plate and the second holding piece, it is possible to prevent the glass from preventing high reliability sealing of the reed switch. The contact gap of the reed switch can be set without applying any external force to each reed piece sealing portion at both ends of the tube.

Furthermore, by arranging the first and second holding pieces with respect to the face plate so that they can move forward and backward at an inclination angle, the movement mechanism can be moved while performing concentrated heat ray heating. The desired contact gap can be set by operating the contact gap, while the face plate and the holding piece can be fixedly moved by the moving mechanism to the desired contact gap amount, and the contact can be set by applying concentrated heating with hot rays. Gap settings can also be made.

According to this latter method, it is possible to repeatedly set the contact gap of the reed switch without activating the moving mechanism each time, thereby further improving productivity.

Furthermore, as in the present invention, a hot wire is applied to predetermined portions of the glass tube of the reed switch that are exposed from the first face plate and the first holding piece and the second face plate and the second holding piece, which are arranged opposite to each other. Setting the contact gap by heating with concentrated irradiation can limit the exposed area of the glass tube to the heater using the first and second face plates and the first and second holding pieces, so there is no chance of accidentally damaging the glass tube. It is possible to prevent thermal strain and deformation from occurring.

[Brief explanation of drawings]

FIG. 1 is a basic configuration layout diagram of a contact gap setting device for a reed switch according to the present invention, FIG. 2 is a partially sectional perspective view of an embodiment of the contact gap setting device for a reed switch according to the present invention, and FIG. FIG. 2 is a sectional view of a main part of this embodiment. 1...Reed switch, 2...Lower holding part, 3...Upper holding part, 4...Lamp, 5...Oval skin - Shooting mirror, 6...
・Base guide, γ...Fine adjustment screw, 8...
・・Hot ray central heater, 9... as face plate, 10...
...Holding piece guide block, 11...Holding piece, 12...Holding piece pull plate, 13...
...screw, 14...holding piece guide plate,
15... Spring, 16... Holding piece pull block, 17... Gap setting base, 18...
... Taper block, 19 ... Slide taper block, 20 ... Heater base, 21
・・・・・・Hexagon socket head screw.

Claims (1)

[Claims] 1. The vicinity of the first lead piece sealed portion of a plurality of zero contact gap reed switches in which a first lead piece is sealed at one end of an elongated glass tube and a second lead piece is sealed at the other end. the first and second face plates, which are arranged opposite to each other and abut against the outer wall of the glass tube near the second reed piece sealing portion, respectively; and the glass tubes of the plurality of reed switches are individually pressed against the face plates, The first and second holding pieces are arranged opposite to each other and move forward and backward at an inclination angle with respect to the face plate, and one of the holding pieces is connected to the face plate and the holding piece. a moving mechanism for moving the face plate in a direction perpendicular to the glass tube contact surface of the reed switch and in a direction perpendicular to the contact surfaces of the first and second lead pieces of the reed switch; and a heater that heats a predetermined portion of the glass tube of the reed switch exposed from the face plate and the second holding piece by concentrating heat rays on the holding piece and the second holding piece. Contact gap setting device.