JPH04461A - Contact device - Google Patents

Abstract

PURPOSE:To obtain this contact device wherein a contact spring having a large- diameter part and a small-diameter part can easily be assembled at a specific position by inserting a contact spring cylinder where the contact spring is held into the hole of an insulating base from one end and fixing it at the specific position with a claw part. CONSTITUTION:The contact spring 18 which consists of the large-dimeter part 18a and small-diameter part 18b is held in a storage part 19a where the large-diameter part 18a is stored and the contact spring holding cylinder 19 which has the through hole 19b where the small-diameter part 18b is passed. In this constitution, the holding cylinder 19 is fixed at the specific position by engaging the claw part 19c at its tip with the tip part of the hole 12b of the insulating base 12, so the spring 18 when fitted to the base 12 is inserted into the holding cylinder 19 and inserted into the base 12 from the rear end while the claw part 19c of the holding cylinder 19 is held on the front side, and the spring is intruded until the claw part 19c is moved beyond the small-diameter part 12c at the end of the hole 12b. Consequently, the holding cylinder 19 is fixed at the specified position and the spring 18 held therein also has its one end pressed against the contact part 17b. Thus, the holding cylinder can be fitted extremely easily and the assembling operation s made extremely easy.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a contact device suitable for use, for example, in connecting a charger wire of a corona charger to an external contact.

BACKGROUND OF THE INVENTION At one end of a conventional corona charger there is provided a contact device for connecting the charger wire to an external contact, as shown in FIG.
The one shown in FIG. 7 is used. That is, an insulating base 2 is attached to the end of the charger case 1, a wire mounting bracket 3 having a bottle 3 and a contact plate 3b is fixed to the insulating base 2, and the charger wire 4 is hung on the pin 3a. It is being The insulating base 2 has a recess 2a in the middle thereof, and a hole 2b that continues from the recess 2a to the rear end of the insulating base, and a contact plate 3b is attached to the innermost position of the hole 2b. . A coil-shaped contact spring 6 having a large diameter portion 5a and a small diameter portion 6b connects the large diameter portion 5a to the contact plate 3I! The small diameter portion 6b extends rearward through the hole 2b. With this configuration, the contact spring 6 is always held at a predetermined position within the insulating base 2 and connected to the wire fitting 3.

Problems to be Solved by the Invention However, with this configuration, there is a problem in that it is extremely difficult to attach the contact spring 5 to a predetermined position within the insulating base 2. That is, in the conventional device described above, it is necessary to pass the small diameter portion 5b of the contact spring 6 through the hole 2b from above the recess 2a of the insulating base 2, and then set the large diameter portion 6a into the recess 2a. Since the recess was extremely small, workability was extremely poor.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a contact device in which a contact spring having a large diameter portion and a small diameter portion can be easily assembled in a predetermined position. .

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides an accommodating portion with an inner diameter for accommodating the large diameter portion of the contact spring, a through hole formed in the bottom wall of the accommodating portion, and an insulating base. The contact spring is held by a contact spring holding cylinder provided with a claw portion for fixing in the hole of the insulating base, and the contact spring holding cylinder is fixed in the hole of the insulating base.

Operation Since the present invention has the above-described configuration, when the contact spring holding tube is inserted from one end of the hole in the insulating base with the contact spring held in the contact spring holding tube, the claw portion will hold the contact spring. A holding cylinder is fixed at a predetermined position within the hole, and a contact spring held by the contact spring holding cylinder is fixed at a predetermined position. In this way, the contact spring can be attached extremely easily.

EXAMPLE Hereinafter, an example in which the present invention is applied to a corona charger will be described.

FIG. 4 is a schematic plan view showing a corona charger equipped with a contact device according to an embodiment of the present invention, in which 1° is a charger case, 11 is a contact device attached to one end of the charger case 11, 12 is an insulating base that constitutes a part of the contact device; 13 is an insulating base attached to the other end of the charger case 11; 14 is a charger wire hung between the insulating bases 12 and 13 on both sides; 15; is a grid electrode.

FIG. 1 is a schematic plan view showing a part of the contact device 11 in cross section, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is an exploded perspective view thereof. The insulating base 12 has a recess 12 & formed in the middle thereof, and a hole 12 b leading from the recess 12 a to the rear end.
The hole 12b has a small diameter portion 12C in a portion communicating with the recess 12a. Reference numeral 17 denotes a wire attachment fitting fixed to the insulating base 12, and has a bin 17a for hanging the charger wire 14 and a contact plate 17b arranged at the back of the hole 12)1. Reference numeral 18 denotes a contact spring, which is coil-shaped and includes a large diameter portion 18a and a small diameter portion 18b. 19 is a contact spring holding cylinder installed in the hole 12b. This contact spring holding cylinder 19 holds the contact spring 1
The contact spring 18 has an inner diameter housing part 19a that accommodates the large diameter part 18a of the contact spring 18, and a through hole 19b that allows only the small diameter part 18b of the contact spring 18 to pass through the bottom wall at the rear end. Furthermore, the contact spring retaining cylinder 19 is provided with a claw portion 19c at its tip that engages with the recess side end of the hole 12b. The outer surface of the tip of the claw portion 19C is tapered to facilitate attachment. In addition, at the tip of the contact spring holding cylinder 19, an axial line (1) is provided so that the claw part 19c can be easily deformed inward in the radial direction.
9d (see FIG. 3) is formed. As shown in FIGS. 1 and 2, this contact spring holding cylinder 19 is fixed in a predetermined position by engaging the claw portion 19c at the tip with the tip of the hole 12b of the insulating base 12. The large diameter portion 18a of the contact spring 18 is restrained inside. As a result, the contact spring 18 is connected to the contact plate 1 of the wire mounting bracket 17.
7b, the small diameter portion 18b extends to the rear of the contact spring holding cylinder 19, and is positioned at a predetermined position within the hole 12b.

To attach the contact spring 18 and the contact spring holding cylinder 19 to the insulating base 12, put the contact spring 18 into the contact spring holding cylinder 19, place the contact spring holding cylinder 19 with the claw part 19c in front, and place the contact spring 18 on the insulating base 12. Insert from the rear end of the hole 12b,
It is sufficient to push it in until the claw portion 19c at the tip passes through the small diameter portion 12c at the end of the hole 12b. As a result, the contact spring holding cylinder 19 is fixed at the predetermined position shown in FIGS.
7b. In this way, installation is extremely easy.

FIG. 6 is a schematic sectional view showing a portion of the other insulating base 13. FIG. This insulating base 13 has a pin 13a, and a charger wire 14 is hung on the pin 13a. Further, a slider 22 is movably held on the insulating base 13 and is urged in the direction of the arrow by a spring 23. This Numuida 22 is provided with a protrusion 22a, and the grid electrode 16 is attached to this protrusion. The slider 22 and spring 23 apply the necessary tension to the grid electrode 15.

Although the present invention has been described above with reference to an example in which the present invention is applied to a corona charger of a contact device, the present invention is not limited to this case, but can be applied to other devices as well.

Effects of the Invention As is clear from the above description, the present invention provides a contact spring that includes a large diameter portion and a small diameter portion, and a contact spring that is provided with an accommodating portion that accommodates the large diameter portion and a through hole that allows the small diameter portion to pass through. Since the contact spring is held in the spring holding cylinder, the contact spring can be attached to the specified position by simply inserting the contact spring holding cylinder into the hole in the insulating base. This has the effect of making assembly work extremely easy.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing a partial cross section of a contact device according to an embodiment applied to a corona charger, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is an exploded perspective view thereof, and Fig. 4 is its A schematic plan view of a corona charger equipped with a contact device; FIG. 5 is a schematic cross-sectional view showing the end of the corona charger on the opposite side from the contact device;
FIG. 6 is a schematic plan view of a contact device provided at one end of a conventional corona charger, and FIG. 8 is a longitudinal sectional view thereof. 1o...Charger case, 11...Contact device, 12...Insulation base, 12a...
・Recess, 12b...hole, 12c...small diameter part, 13...-insulation base, 14...
Charger wire, 16... Grid electrode, 17.
...Wire mounting bracket, 17a...Pin,
17b...Contact plate, 18...Contact spring, 18a...Large diameter part, 18b...Small diameter part, 19...Contact spring Holding tube, 19a...
... Accommodation section, 19b... Through hole, 19c...
...Claw part. Name of agent: Patent attorney Shigetaka Awano and one other person Toden 6 Goose J! θ value I HI! To the edge-nu[! ! ll#1 Yakusuku p K1! Heavy sound 1□ 1' tiWN 'M Satoru IX 19b-1IM hole 1% /I /9' -1p, Part 2 Fig.

Claims (1)

[Claims] A coil-shaped contact spring comprising an insulating base with a hole opened at one end and a contact plate at the back of the hole, and a large diameter part and a small diameter part, the end on the large diameter part side being A contact spring is arranged in the hole so as to be in contact with the contact plate, and a contact spring holding cylinder is attached to the hole of the insulating base and holds the contact spring, and the contact spring holding cylinder holds the contact spring. an accommodating part with an inner diameter for accommodating the large diameter part of the accommodating part, a through hole formed in the bottom wall of the accommodating part and allowing the small diameter part to pass through, and a claw part for fixing the contact spring holding cylinder in the hole of the insulating base. A contact device comprising: