JPH049700Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a cased switch equipped with means for facilitating contact pressure testing.

[Conventional technology]

Conventionally, one of the product inspections for switches is contact pressure inspection, but when performing this inspection, it is difficult to bring the contact pressure test pin into contact with the movable spring when the switch is fully assembled in the switch case. Since this was either impossible or impossible, contact pressure tests were performed using a dummy (switch case) before the switch was fully assembled.
After the inspection was completed, the dummy was removed and the switch was assembled (unspecified).

[Problem that the invention attempts to solve]

However, with the above-mentioned conventional method, it takes time and effort to install and remove the dummy during inspection. In addition, variations tend to occur between the installation status of the movable spring at the time of the inspection and that in the actual product due to molding distortion of the movable spring and switch case, so that the proper contact pressure of the actual product is There was a problem that the product could not be detected, and even if the contact pressure was insufficient, it would be considered an acceptable product.

This idea was devised to solve this problem, and by making it possible to test the contact pressure of actual products, we aim to simplify, increase accuracy, and improve the quality of contact pressure tests, making them reliable. The aim is to obtain a highly stable switch.

[Means for solving problems]

As shown in Fig. 1, this idea consists of a fixed contact 2 and a movable contact 3 that can be freely connected to and separated from the fixed contact 2 in a switch case 1.
It is assumed that the switch is of a type in which a movable spring 4 having a movable spring 4 is accommodated. It is sufficient that at least one set of the fixed contact 2 and the movable contact 3 is housed in the switch case 1. In addition, as in the embodiments described later, two or more sets of the fixed contact 2 and the movable contact 3 are incorporated. Needless to say, it can be similarly applied to objects. Further, in order to move the movable contact 3 of the movable spring 4 toward and away from the fixed contact 2, the opening/closing actuator 5 may be a push button, a rotary button, or It can be applied to anything that uses a swinging lever, etc.

In addition, the present invention provides an inspection hole 13 in the switch case 1 equipped with the fixed contact 2, the movable spring 4, and the opening/closing actuator 5 that allows the contact pressure inspection pin P to be inserted and removed from the outside of the switch case 1. The contact pressure test pin P inserted into the test hole 13 is inserted into the movable spring 4 when the movable contact 3 is brought into contact with the fixed contact 2 by the opening/closing actuator 5. The requirement is that the movable contact 3 is pressed with a predetermined pressure in the direction away from the fixed contact 2.

[Effect of idea]

According to the present invention, when the contact pressure test pin P is inserted into the test hole 13 of the switch case 1 while the movable contact 3 is in contact with the fixed contact 2 by the switching actuator 5, the pin P reaches a predetermined pressure. It comes into contact with the movable spring 4. Therefore, by setting the pressing force of the contact pressure test pin P to a predetermined value, the contact pressure of the movable spring 4 can be easily and reliably tested depending on whether the movable contact 3 is separated from the fixed contact 2 or not. Moreover, it has the advantage that accurate inspection can be performed on the actual product without using a dummy as in the conventional method.

〔Example〕

Hereinafter, embodiments of the present invention will be described by taking as an example a triple type switch in which a sliding opening/closing element is slid in three stages to connect and disconnect. In the drawing, the switch case 1 consists of a plastic case body 1a and a case lid 1b, and inside the opening of the case body 1a is a movable spring 4 having a fixed contact 2, a movable contact 3, and a slidable opening/closing actuator. 5 is incorporated, and then the case lid 1b
cover the top of the opening of the case body 1a, and then close the case lid 1.
The hole 15 on the b side is engaged with the protrusion 16 on the case main body 1a side to be integrally connected.

As shown in FIG. 5, the fixed contact 2 consists of three parallel left, right, and intermediate fixed contacts 2a, 2b, and 2c. It is integrally embedded and molded in the front-rear direction in the contact holding part 6 which is protruded from the front and back sides.

The movable spring 4 is composed of three parallel left and right intermediate movable springs 4.
a, 4b, 4c, these movable springs 4a,
4b and 4c are integrally joined to the other end in the front and back direction of the upper opening surface of the case body 1a.
The movable contacts 3 of the movable springs 4a, 4b, 4c are embedded at a predetermined contact point above the fixed contacts 2a, 2b, 2c. They are arranged facing each other in parallel with a space between them.

The opening/closing actuator 5 has a first operating portion 8a and a second operating portion 8 at the upper front end and left and right side portions of the upper rear end of the main body 5a, which is formed into a gate shape when viewed from the front.
b. The third operating portions 8c are provided in that order with their phases shifted by a predetermined pitch in the front-rear direction. A knob 9 protruding from the opening window of the case lid 1b is provided on the upper surface of the actuator main body 5a. As shown in FIG. 4, this opening/closing actuator 5 has a case body 1a with a main body 5a straddling the upper part of the intermediate movable spring 4c.
It is built in so that it can be slid forward and backward.

Between the opening/closing actuator 5 and the inside of the case body 1a,
The opening/closing actuator 5 is configured to position and hold the opening/closing actuator 5 in a fully off position a, a first on position b, a second on position c, and a third on position d, respectively. Moderation measures are provided.
Specifically, a ball 10 is provided in a ball holding cylinder 17 attached to one side of the lower part of the main body 5a of the opening/closing actuator 5 via a spring 11 so as to be freely retractable. First, second, third, and fourth grooves 18a, 18b, which are sequentially engaged and disengaged by sliding movement of the actuator 5 in the front-back direction.
18c and 18d are arranged in rows at a predetermined pitch in the front-rear direction. The ball 10 of the opening/closing actuator 5 is now in the first groove 1
8a, the opening/closing actuator 5
All of the first, second, and third operation parts 8a, 8b, and 8c are removed from each pressed protrusion 12 of the left, right, and intermediate movable springs 4. In the first ON position b where the ball 10 of the opening/closing actuator 5 engages with the second groove 18b, the first operating portion 8a of the opening/closing actuator 5 presses the pressed protrusion 12 of the intermediate movable spring 4c. The movable contact 3 is brought into contact with the lower fixed contact 2c. The ball 10 of the opening/closing actuator 5 is in the third groove 18
In the second on position c where the opening/closing actuator 5 engages with
The second operating portion 8b presses the pressed protrusion 12 of the right movable spring 4b to bring the movable contact 3 into contact with the lower fixed contact 2b. In the third ON position d, where the ball 10 of the opening/closing actuator 5 engages with the fourth groove 18d, the third operating portion 8c of the opening/closing actuator 5 presses the pressed protrusion 12 of the left movable spring 4a. The movable contact 3 is brought into contact with the lower fixed contact 2a.

Incidentally, this switch is built into a hair dryer, for example, and drives the fan drive motor at the first on position b, and turns on the heater at the second on position c.
It is set to 600W and can be converted to 1200W in the third on position d.

In a switch with such an internal structure and operation order, the case body 1 is
A test hole 13 into which a contact pressure test pin P can be inserted and removed is provided in the bottom part to which the fixed contact 2 of a is fixed in a vertically penetrating manner, and the fixed contact is located corresponding to the upper end opening of the test hole 13. 2 is provided with a hole or notch 14 so as to communicate with the inspection hole 13, and the movable contact 3 is made to face above the hole or notch 14.

Now, when testing the contact pressure of this switch, as shown in Fig. 6, with the switch completely assembled, connect the fixed contact 2 and movable spring 4 between battery B and lamp L, and Then, the movable contact 3 is brought into contact with the fixed contact 2, and the tip of the contact pressure test pin P is inserted into the test hole 13 and pressed into contact with the movable contact 3. At this time, the pressing force of the contact pressure test pin P is set to a predetermined pressure (for example, 70 g).
If the lamp L disappears by pressing this contact pressure test pin P (if the contact pressure is 70 g or less), it is considered defective, and if it remains lit, it is considered good. In addition, for non-defective products, there is an inspection hole 1 as shown in Figure 1.
3 with a label R or the like, it is possible to easily identify good products and defective products using this as a mark, and it is also possible to prevent dust from entering the inspection hole 13.

In the above embodiment, the contact pressure test pin P is fixed to the contact 2.
The fixed contact 2 is provided with a hole or notch 14 so that it can be inserted from below and press the movable contact 3. For example, as shown in FIG.
When inserting from the direction away from the fixed contact 2 and contacting the movable contact 3 as shown by the imaginary line, or the left side of the switch case 1 corresponding to the left or right side between the fixed contact 2 and the movable contact 3. It goes without saying that when the test pin P is inserted from the wall or the right side wall, the hole or notch 14 does not need to be provided in the fixed contact 3.

[Brief explanation of the drawing]

The drawings show one embodiment of the switch according to the present invention, and FIG. 1 is a sectional view taken along the line A-A in FIG. 2, FIG. 2 is an external perspective view, FIG. 3 is a bottom view, and FIG.
The figures are a sectional view taken along the line B--B in FIG. 2, FIG. 5 is an exploded perspective view, and FIG. 6 is a sectional view showing a contact pressure test state. 1...Switch case, 2...Fixed contact, 3...
...Movable contact, 4...Movable spring, 13...Inspection hole,
P...Contact pressure test pin.

Claims (1)

[Scope of Claim for Utility Model Registration] A movable spring 4 having a fixed contact 2 and a movable contact 3 that can freely come into contact with and separate from the fixed contact 2 in the switch case 1, and the movable spring 4 is pressed to bring the movable contact 3 into contact with the fixed contact 2. In the switch housing the switch case 1, the switch case 1 is provided with an inspection hole 13 extending inside and outside the case to allow the contact pressure test pin P to be inserted and removed from the outside of the switch. It is provided in a penetrating shape, and when the movable contact 3 is brought into contact with the fixed contact 2 by the opening/closing actuator 5, the contact pressure test pin P inserted through the inspection hole 13 causes the movable spring 4 to be fixed by the movable contact 3. A switch characterized in that it is pressed with a predetermined pressure in a direction away from a contact point 2.