JPH0648708Y2 - Neutral start switch for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to an automatic transmission for selectively supplying power to a load such as an indicator or a backup lamp based on a selection operation of the automatic transmission. For neutral start switch for

(Prior Art) The neutral start switch of the automatic transmission has "P
(Parking) and "N (neutral)" positions, in addition to the switch to start
The backup lamp at the rear of the vehicle body is turned on in the "R (reverse)" position, and "P", "R", "N (neutral)", "D (drive)", "2 (second)", "L ( For example, a switch unit for turning on an indicator lamp arranged on a dashboard is provided at each position of "low". Each switch part
It is selected by operating the position of the shift lever of the automatic transmission.

An example of this type of switch is shown in FIGS. In FIG. 4, 1 is a stator provided with a plurality of fixed contacts 2, which has a fan shape as a whole,
A shaft insertion hole 3 is provided at the center of the fan shape. Reference numeral 4 denotes a movable body having a movable contact 5, which has a shaft portion 6 formed at one end thereof. Reference numeral 7 is a fan-shaped cover as a whole, and a shaft insertion hole 8 is formed in the fan-shaped central portion.

As shown in FIG. 5, the movable body 4 is rotatably arranged on the stator 1 with one end portion of the shaft portion 6 inserted into the shaft portion insertion hole 6 of the stator 1. The stator 1 and the movable body 4 are covered with a cover 7. In this case, the other end of the shaft 6 is inserted into the shaft insertion hole 8 of the cover 7. Further, as shown in the figure, step portions 3a and 8a are formed in the respective shaft portion insertion holes 3 and 8, and the step portions 3a and 8a are formed.
Seal members 9, 9 are attached to a.

Here, as shown in FIG. 5 and FIG. 6, the stator 1 is composed of an insulator 10 having the above-mentioned fixed contacts 2 and a housing 11 into which the insulator 10 is inserted. The insulator 10 has a fan shape as a whole, but the shaft insertion hole 3 and the seal mounting step 8a are provided.
Are formed in the housing 11 as can be seen from the figure.

(Problems to be Solved by the Invention) In the stator 1, the insulator 10 is used.
In the case of insert molding, as shown in FIG. 7, an insulator 10 is placed in a mold (not shown) and a resin for the housing 11 is poured. However, in order to prevent the insulator 10 from moving, the insulator 10 does not move. A positioning pin 13 is fitted into a pin hole 12 formed in advance in 10. However, in this case, since the unnecessary pin hole 12 is exposed to the outside from the molded housing 11, the problem of the sealing property remains. As a countermeasure against this, an adhesive (5th
It was inevitable to perform troublesome post-processing such as filling with (15) in the figure) or putting a rubber stopper.

Therefore, an object of the present invention is to provide a neutral start switch for an automatic transmission, which has a hole for stopping movement of the insulator at the time of molding, but the hole does not remain unnecessarily and need not be sealed with an adhesive or the like. To provide.

[Advantages of the Invention] (Means for Solving the Problems) The present invention is configured so that an insulator having a plurality of fixed contacts and a housing in which the insulator is insert-molded form a fan-shaped central portion as a whole. A stator having a shaft insertion hole formed therein, and a movable body having a shaft and a movable contact that is rotated about the shaft based on a position select operation to change a switch conduction state In, a circular arc frame portion is formed so that an opening of the shaft portion insertion hole is formed in a fan-shaped central portion of the insulator, and a seal member having a larger diameter than the shaft portion insertion hole is formed at an edge portion of the opening of the insulator. It is characterized in that the mounting step is formed so as to be exposed from the housing.

(Operation) Since the insulator has an opening for a shaft portion insertion hole in its fan-shaped central portion and a step portion for mounting a seal member is formed to be exposed from the housing at the opening, the insulator is inserted. When molding the housing with, it is necessary to bring the mold into contact with the step to expose the step. If this mold is used as a positioning pin, the insulator can be stopped from moving, and a stepped portion, not an unnecessary pin hole, remains in the removal trace of the positioning pin. Moreover, since the step portion is sealed by the seal member, it is not necessary to take waterproofing measures.

(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, in FIG. 1 and FIG. 2, the same parts as those in the prior art are designated by the same reference numerals, and accordingly, 4 is a movable body having a movable contact 5, and 6 is a shaft portion formed at one end thereof. , 7 is a fan-shaped cover as a whole, and 8 is a shaft insertion hole formed in this cover.

Now, 21 is a stator, which is an insulator 22
And housing 23 formed by insert molding
It is configured to have a fan shape as a whole.
The shaft insertion hole 21a is formed in the center of the fan 21 of the stator 21.
Are formed. As shown in FIG. 2, the insulator 22 is provided with a plurality of fixed contacts 2 and, although not shown, known positions “P”, “R”, “N”,
The switch conduction state with the movable contact 5 is changed by "D", "2", and "L". An arcuate frame portion 25, which forms an opening 24 for a shaft portion insertion hole, is formed in the fan-shaped central portion of the insulator 22. Further, in the insulator 22, a step portion 26 for mounting a seal member, which has a diameter larger than that of the shaft portion insertion hole 21a, is formed at the edge of the opening 24 so as to be exposed from the housing 23 to the outside. The shaft portion 6 of the movable body 4 is inserted into the shaft portion insertion hole 21a, and the seal member 9 is attached to the step portion 26.

According to this embodiment having the above-described structure, the insulator 22 has the opening 24 for the shaft portion insertion hole in the fan-shaped central portion, and the opening 24
Since the step portion 26 for mounting the seal member is formed so as to be exposed from the housing 23, the insulator is formed.
When the housing 23 is molded with the 22 inserted, it becomes necessary to bring the mold into contact with the stepped portion 26 so as to leave the stepped portion 26. Then, as shown in FIG. 3, if a mold for leaving the step portion 26 is constituted by a positioning pin 27 and the insulator 22 is positioned by this positioning pin 27, the insulator 22 can be stopped during insert molding, and The step 26 that is originally necessary remains on the trace of the positioning pin 27, and there is no possibility that an unnecessary pin hole as in the conventional case remains. Moreover, since the stepped portion 26 is sealed, it is not necessary to take waterproofing measures such as filling with an adhesive or press-fitting with a rubber plug, and in general, the sealing property and the manufacturability can be improved.

[Effects of the Invention] As is apparent from the above description, the present invention is configured so that an insulator having a plurality of fixed contacts and a housing in which the insulator is insert-molded form a fan-shaped center as a whole. A stator having a shaft portion insertion hole formed therein, and a movable body having a shaft portion and a movable contact, which is rotated about the shaft portion based on a position select operation to change a switch conduction state. In this case, an arc frame portion is formed so that an opening for the shaft portion insertion hole is formed in a fan-shaped center portion of the insulator, and a diameter of the arc frame portion is larger than that of the shaft portion insertion hole at an edge portion of the opening of the insulator. It is characterized in that a step portion for mounting a seal member is formed so as to be exposed from the housing. The insulator can be stopped, and the insulator can be positioned at the originally required step portion. As a result, there is no need to leave unnecessary pin holes as in the past, and since the step is originally sealed, it is not necessary to take waterproofing measures such as filling with an adhesive or press fitting a rubber stopper, in general, The sealability and the manufacturability can be improved.

[Brief description of drawings]

1 to 3 show one embodiment of the present invention. FIG. 1 is a vertical sectional side view, FIG. 2 is a front view of a stator, and FIG. 3 is a vertical sectional side view showing an example of molding a stator. Is.
4 to 7 show a conventional example, FIG. 4 is an exploded perspective view, FIG. 5 is a view corresponding to FIG. 1, FIG. 6 is a view corresponding to FIG. 2, and FIG. 7 is a view corresponding to FIG. It is a figure. In the figure, 4 is a movable body, 5 is a movable contact, 6 is a shaft portion, 7
Is a cover, 9 is a sealing member, 21 is a stator, 22 is an insulator, 23 is a housing, 24 is an opening, 25 is an arc frame portion,
26 is a step.

Claims (1)

[Scope of utility model registration request] 1. A stator having a plurality of fixed contacts and a housing in which the insulator is insert-molded so as to form a substantially fan shape as a whole, and a shaft portion insertion hole is formed in the center portion of the fan shape, and a shaft portion. And a movable body which has a movable contact and which is rotated about the shaft portion based on a position select operation to change the switch conduction state, and the shaft portion is inserted into the fan-shaped central portion of the insulator. A circular arc frame is formed so that an opening for a hole is formed, and a step portion for mounting a seal member having a diameter larger than that of the shaft insertion hole is exposed from the housing at an edge portion of the opening of the insulator. Neutral start switch for automatic transmission characterized by being formed.