JP3536395B2 - Switch device for key cylinder - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key cylinder switch device.

[0002]

2. Description of the Related Art Conventionally, there has been known a switch device which operates in response to a turning operation of a key cylinder (see, for example, Japanese Utility Model Laid-Open No. 5-61938). This type of switch device generally has a structure in which a movable contact, a substrate, and the like are housed in a switch case attached to an end of a key cylinder, and the cover is hermetically sealed. That is, since the internal contacts and the substrate are reluctant to invade water, a seal member such as an O-ring is interposed between the lid and the switch case for waterproofing.

[0003]

However, in such a conventional technique, although the structure is such that the waterproof property is ensured by the interposition of the seal member, the seal member such as the O-ring may be mounted depending on the mounting condition. Since it may be twisted inside or expanded or contracted due to temperature change, there is concern about reliability regarding waterproofing.

There is also a problem regarding waterproofing, especially regarding the connection portion of the "harness". In other words, conventionally, the structure is such that a hole is opened in the switch case and the terminal of the harness is introduced from the inside, but a small dedicated seal member is required to seal the gap between this hole and the harness. , Causing an increase in the number of parts.

Therefore, there has been an attempt to abolish the structure of the lid and the seal member and directly harden the periphery of the substrate and the connecting portion of the harness with a filler such as an adhesive to obtain a perfect waterproof property. However, since a switch device suitable for a waterproof structure with this filler has not been proposed yet, filling the switch case with the conventional structure with the filler does not work well, and a cavity is created inside, so a sufficient waterproof property is obtained. Performance cannot be obtained.

The present invention has been made by paying attention to such a conventional technique, and provides a switch device for a key cylinder suitable for a waterproof structure using a filler.

[0007]

The invention according to claim 1 is
In the peripheral flange of the switch case attached to the end of the key cylinder, a switch chamber for accommodating the movable contact portion and a harness chamber for introducing the terminal of the harness are partitioned and formed by a partition wall, and the switch chamber and the harness are provided. Attach the board with the fixed contact and the harness connection to the chamber in a state of abutting against the top surface of the partition wall, cover the entire surface of the switch chamber with the fixed contact, and place the harness chamber on the side opposite to the partition wall. With the filling port left in a state of being covered with the harness connecting portion, a groove portion for capturing a filler is formed on the top surface of the partition wall,
Moreover, a small hole-shaped or notched confirmation portion is formed at the position of the harness connection portion on the partition wall side.

According to the second aspect of the present invention, the peripheral flange is higher than the surface of the substrate by a predetermined step.

According to the third aspect of the present invention, a protrusion for preventing the substrate from coming off is formed at a step portion of the peripheral flange with respect to the substrate.

According to the fourth aspect of the invention, the harness introducing portion of the peripheral flange forming the harness chamber is removable.

[0011]

According to the first aspect of the present invention, since the confirmation portion is formed in the harness connection portion of the substrate that covers the harness chamber, air can be evacuated from the confirmation portion when the filler is filled from the filling port into the harness chamber. At the same time, it is possible to know that the harness chamber is filled with the filler by the filler coming out from the confirmation portion. Further, since the groove is formed on the top surface of the partition wall, even if a part of the filler filled in the harness chamber tries to enter the switch chamber through the gap between the partition wall and the substrate, the filler is not filled. Is stored in the groove and does not reach the switch chamber. Since the movable contact portion is housed inside the switch chamber, the filler is applied between the outer surface of the substrate and the peripheral flange without being filled inside.

According to the second aspect of the present invention, since the peripheral flange is higher than the surface of the substrate by a predetermined step, the step is utilized to make a gap between the end of the outer surface of the substrate and the peripheral flange. This makes it easier to apply the filler to the.

According to the third aspect of the present invention, since the protrusion for preventing the substrate from coming off is formed in the step portion of the peripheral flange with respect to the substrate, the protrusion and the substrate end portion are engaged with each other, so that the substrate The mounting condition becomes reliable.

According to the fourth aspect of the present invention, since the harness introducing portion of the peripheral flange forming the harness chamber is detachable, the harness and the board can be connected at a position apart from the switch case. It is possible and has good workability.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS.
It will be described based on. A key cylinder 1 is operated by a key 2 inserted from one end side. The switch case 3 is attached to the other end of the key cylinder 1. The switch case 3 is attached by engaging the holes 4a of the upper and lower holding pieces 4 with the convex portions 1a of the key cylinder 1.

In this switch case 3, a switch chamber 7 and a harness chamber 8 are defined by a peripheral flange 5 and a partition wall 6. The switch room 7 is circular and the harness room 8
Has a rectangular shape that protrudes to the outside. Partition wall 6
Has a curved shape corresponding to the outer edge of the switch chamber 7,
Its height is set lower than that of the peripheral flange 5.
A groove 6a is formed on the top surface of the partition wall 6.

A rotor 9 as a "movable contact portion" having a movable contact 9a is housed in the switch chamber 7. The rotor 9 is rotated via the key rotor 1b at the rear end of the key cylinder in response to the rotation operation by the key 2. In addition, the peripheral flange 5 that forms the inside of the harness chamber 8
The upper surface portion 10 as the "harness introduction portion" is removable and the introduction hole 1 formed in the upper surface portion 10
Terminals 11a of three harnesses 11 are introduced from 0a.

In the switch case 3, a substrate 14 composed of a fixed contact portion 12 and a harness connecting portion 13 is provided.
Is installed. As a method of mounting this board 14,
First, through the introduction hole 10a of the upper surface portion 10 removed from the peripheral flange 5 to the terminal 11a of the harness 11, the upper surface portion 10
The terminal 11a of the harness 11 after passing through the board 14
It is connected to the harness connection part 13 of. Since the work of connecting the terminal 11a of the harness 11 can be performed at a position distant from the switch case 3 in this way, workability is very good.

Then, the board 14 to which the harness 11 is connected is attached to the switch case 3, and the board 14 is attached.
Is abutted against the top surface of the partition wall 6. A plurality of protrusions 15 are formed on the inner surface of the peripheral flange 5, and the attachment state of the substrate 14 is maintained by the engagement between the protrusions 15 and the ends of the substrate 14. Since the partition wall 6 is lower than the peripheral flange 5, a predetermined step d is formed between the attached substrate 14 and the peripheral flange 5.

The fixed contact portion 12 of the board 14 thus mounted covers the entire surface of the switch chamber 7, and the harness connection portion 13 covers the harness chamber 8 with the filling port 16 left on the upper side. In addition, at a position near the partition wall 6 of the harness connecting portion 13 on the board 14, a small hole-shaped confirmation portion 17 formed in the center and cutout-shaped confirmation portions 18 are formed at both left and right ends. Since the board 14 has a shape including the circular fixed contact portion 12 and the rectangular harness connection portion 13, and the peripheral flange 5 of the switch case 3 also has a shape corresponding thereto, the circular fixed contact portion 12 is Even if rotational force is applied from the rotor 9, the entire substrate 14 does not rotate in the switch case 3, and highly reliable switch performance can be obtained.

Next, a method of filling the filler S will be described. First, the substrate 14 of the switch case 3 is placed on the upper side, and the filler S is filled into the inside of the harness 11 from the filling port 16 by the nozzle 19. The filler S is filled into the harness chamber 8 through the nozzle 19, but the confirmation unit 1 is provided on the substrate 14.
7 and 18 are formed and air can be evacuated from the confirmation portions 17 and 18, so that the filler S is filled into the harness chamber 8 without any gap. Further, when the inside of the harness chamber 8 is completely filled with the filler S, the filler S is filled with the confirming portions 17, 18.
As the worker comes out of the inside of the harness chamber 8,
You can know that was satisfied in. In this way, since the inside of the harness chamber 8 is solidified with the filler S without any gap, the gap between the upper surface portion 10 and the peripheral flange 5 and the gap between the harness 11 and the introduction hole 10a can be completely closed. , Can obtain sufficient waterproofness.

Further, since the groove 6a is formed on the top surface of the partition wall 6, a part of the filler S filled in the harness chamber 8 passes through the gap between the partition wall 6 and the substrate 14 to switch the switch. Even if an attempt is made to enter the chamber 7, the groove 6a is stored and captured, and the filler S does not reach the switch chamber 7. Since the substrate 14 is in a state of being abutted against the top surface of the partition wall 6, there is essentially no gap between the partition wall 6 and the substrate 14, but contraction due to a change in ambient temperature of the partition wall 6 occurs. Since there is a possibility that a slight gap may occur due to such reasons, the groove portion 6a is formed to catch the intruding filler S as a precaution.

The filler S for the switch chamber 7
Is applied between the outer surface of the substrate 14 and the peripheral flange 5. That is, since the switch chamber 7 has the movable contact portion inside, the filler S cannot be filled inside,
It is provided between the outer surface of the substrate 14 and the peripheral flange 5. At this time, since the peripheral flange 5 is higher than the substrate 14 by the predetermined step d, the filler S can be applied by using this step d, and the workability is very good.

[0024]

According to the first aspect of the present invention, since the confirmation portion is formed in the harness connection portion of the substrate that covers the harness chamber, when the filler is filled into the harness chamber from the filling port,
Air can be discharged from the confirmation unit, and it is possible to know that the harness chamber is filled with the filler by the filler flowing out from the confirmation unit. Further, since the groove is formed on the top surface of the partition wall, even if a part of the filler filled in the harness chamber tries to enter the switch chamber through the gap between the partition wall and the substrate, the filler is not filled. Is stored in the groove and does not reach the switch chamber. Since the movable contact portion is housed inside the switch chamber, the filler is applied between the outer surface of the substrate and the peripheral flange without being filled inside.

According to the second aspect of the invention, since the peripheral flange is higher than the surface of the substrate by a predetermined step, the step is utilized to make a gap between the end of the outer surface of the substrate and the peripheral flange. This makes it easier to apply the filler to the.

According to the third aspect of the present invention, since the protrusion for preventing the substrate from coming off is formed on the step portion of the peripheral flange with respect to the substrate, the protrusion and the substrate end portion are engaged with each other, so that the substrate The mounting condition becomes reliable.

According to the invention of claim 4, since the harness introducing portion of the peripheral flange forming the harness chamber is detachable, the harness and the board can be connected at a position apart from the switch case. It is possible and has good workability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a key cylinder switch device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a switch case.

FIG. 3 is a side view seen from the direction of arrow DA in FIG.

[Explanation of symbols]

1 key cylinder 3 switch case 5 peripheral flange 5a groove 6 partition walls 7 switch room 8 harness room 9 Rotor (moving contact part) 10 Top part (harness introduction part) 11 harness 11a terminal 12 Fixed contact part 13 Harness connection 14 board 15 protrusions 16 Filling port 17, 18 Confirmation section d step S filler

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H01H 27/06 H01H 19/06 H01H 9/04

Claims (4)

(57) [Claims] 1. A switch chamber for accommodating a movable contact portion and a harness chamber for introducing a terminal of a harness are partitioned and formed by a partition wall in a peripheral flange of a switch case attached to an end of a key cylinder. A substrate having a fixed contact portion and a harness connection portion is attached to the switch chamber and the harness chamber in a state of abutting against the top surface of the partition wall, and the entire switch chamber is covered with the fixed contact portion, and the harness chamber is With the filling port left on the side opposite to the partition wall and covered with the harness connecting portion, a groove for capturing a filler is formed on the top surface of the partition wall, and at the position of the harness connecting portion on the partition wall side. A key cylinder switch device, characterized in that a small hole-shaped or cutout-shaped confirmation portion is formed. 2. The key cylinder switch device according to claim 1, wherein the peripheral flange is higher than the surface of the substrate by a predetermined step. 3. A protrusion for preventing detachment of the substrate is formed at a step portion of the peripheral flange with respect to the substrate.
Switch device for the described key cylinder. 4. The key cylinder switch device according to claim 1, wherein a harness introducing portion of a peripheral flange forming the harness chamber is removable.