CN1324621C - Switch device - Google Patents

Abstract

A switching device that can cope with both high-load areas and micro-areas, is less likely to cause arc consumption at high loads, and can obtain stable contact. Formed on the movable contact (7) is a first contact portion (7b) in sliding contact with the common fixed contact (2), and a second and third contact portion (7c, 7d) in sliding contact with the individual fixed contact (3), On the single fixed contact (3), form the first contact portion (3c) for arc consumption which contacts with the second contact portion (7c) first along the direction perpendicular to the lifting direction of the drive member (9), and then contacts with the second contact portion (7c) The 2nd contact part (3d) that the 3rd contact part (7d) contacts uses the lower surface side of the 2nd contact part (3d) as the contact surface that slides with the 3rd contact part (7d), and at the same time the first contact part ( 3c) A non-conductive portion separated from the second contact portion (7c) is formed on the track of sliding contact with the second contact portion (7c) on the lower surface side.

Description

switchgear

technical field

The present invention relates to a vehicle-mounted switch device, and more particularly to a structure using a switch device for lighting when a door of an automobile is opened and closed.

Background technique

As the structure of the conventional switchgear, since it is necessary to switch the lamp load, a microswitch-type detection switch that can be used in a high-load area is used (for example, refer to Patent Document 1).

Hereinafter, the configuration of a conventional microswitch type switch device for vehicles will be described with reference to the drawings. FIG. 9 is a cross-sectional view showing the structure of a conventional microswitch-type switch device.

In FIG. 9 , the switch device comprises a case 51 with a base 52 and a cover 53 . Contacts 56 , 57 , 58 are inserted into the base 52 , and one end thereof protrudes outward to form connection contacts 60 , 61 , 62 . In addition, the contacts 57 and 58 are arranged at upper and lower positions facing each other.

One end of a movable contact 64 is fixed to the contact 56, and the movable contact 64 is arranged in a folded state made of a thin metal sheet, and ball contacts 65 are provided on the upper and lower sides of the other end. The ball contact 65 is located between the contacts 57 and 58 , and its upper side is in contact with the contact 58 .

A movable switch lever 67 is guided in the upper opening 66 of the cover 53 . There is a horizontally supported lever 68 on the switch lever 67 , and the lever 68 is pushed upward by the spring action of the movable contact 64 , thereby being held directly below the cover 53 .

In addition, a rubber bellows 72 is fitted around the opening 66 of the cover 53, and the rubber bellows 72 is fitted to the upper part of the switch lever 67 to seal the inside of the switch.

When the switch lever 67 is activated, the movable contact 64 is pressed downward. When the switching point is exceeded, the movable contact 64 turns over and the ball contact 65 moves downward to contact the contact 57, so that the contact is switched. When the switch is turned on from this state, the movable contact 64 is turned over again to return to the original state.

[Patent Document 1] Japanese Unexamined Patent Publication No. 7-73776

In the past, as a switch device used for lighting when the door is opened and closed in a car, a micro switch type switch device in a high-load area was used to cope with it. Requirements for the switchgear used. At this time, because of the problem of contact reliability, it is not possible to use a microswitch type switch device in a high-load area in a small area, so another switch device dedicated to a small area is used.

Therefore, it is necessary to use a dedicated switchgear according to each application, and it is necessary to review the switchgear used in the product update of the car, and when there is a change from a high-load area to a small area, it has to be compared. The problem of big changes.

Contents of the invention

Therefore, the present invention was made to solve the above-mentioned problems, and its object is to provide a system that can cope with both the high-load area and the micro-area, and that is less likely to cause arc consumption at high loads, and can obtain Stable contact switching device.

In order to achieve the above object, the structure of the switchgear as the first solution in the present invention includes: a housing with a storage part, a shared fixed contact and a separate fixed contact erected from the inner bottom surface of the storage part, and a liftable The driving part contained in the above-mentioned housing, and the movable contact held on the driving part and slidingly contacting with the above-mentioned common fixed contact and the individual fixed contact as the driving part moves up and down; formed on the above-mentioned movable contact There is a first contact part in sliding contact with the common fixed contact, and a second and third contact parts in sliding contact with the above-mentioned individual fixed contact. A first contact portion for arc consumption that first contacts the second contact portion, and a second contact portion that subsequently contacts the third contact portion are formed, and the lower surface side of the second contact portion serves as a contact with the first contact portion. 3. On the contact surface where the contact part is in sliding contact, a non-conductive part separated from the second contact part is formed on the trajectory of the sliding contact with the second contact part on the lower surface side of the first contact part.

In addition, as a configuration of the second solution, a cutout portion continuous to the lower surface side of the first contact portion is formed in the individual fixed contact, and the non-conduction portion is formed by the cutout portion.

In addition, as a configuration of a third solution, the common fixed contact and the individual fixed contact are arranged side by side on the inner bottom surface of the storage portion of the housing along a direction perpendicular to the lifting direction of the driving member.

In addition, as a fourth solution, the first contact portion and the second contact portion of the individual fixed contact are formed in a stepped shape, and the first contact portion protrudes upward from the second contact portion.

Also, as a configuration of a fifth solution, contact pieces made of noble metal are fixed to the first, second, and third contact portions of the movable contact, and the movable contacts of these fixed contact pieces are connected to each other. The common fixed contact and the individual fixed contact are sandwiched from both sides for sliding contact.

As mentioned above, the switchgear of the present invention includes: a housing having a storage portion, a shared fixed contact point and a separate fixed contact point erected from the inner bottom surface of the storage portion, and a drive member that is housed in the housing in a liftable manner. , and a movable contact held on the drive part and slidingly contacted with the common fixed contact and the individual fixed contact as the drive part moves up and down; a first contact part formed on the movable contact and in sliding contact with the shared fixed contact; and The second and third contact parts that are in sliding contact with the individual fixed contact form a first contact part for arc consumption that first contacts the second contact part along the direction perpendicular to the lifting direction of the driving part on the individual fixed contact, And the second contact part that contacts the third contact part after that, the lower side of the second contact part is used as the contact surface for sliding contact with the third contact part, and at the same time, the second contact part on the lower side of the first contact part A non-conductive part separated from the second contact part is formed on the track of the sliding contact of the part, so even when it is used on a high load, the contact part for arc consumption is provided as a response to the arc that occurs when the contact is switched, so It is possible to obtain stable contact by reducing wear that usually occurs on the contact portion during switching, and to achieve long life of the contact.

In addition, since the non-conduction portion with the contact portion is formed on the bottom side of the arc contact point, that is, on the sliding contact track, cutting between the contacts due to arc consumption can be prevented and durability can be improved.

In addition, since a cutout continuous to the bottom side of the first contact part is formed on the single fixed contact, and the non-conduction part is formed by the cutout, the sliding contact track on the bottom side of the arc contact point can be cut off, so that The simple structure prevents the contacts from cutting each other due to arc consumption.

In addition, since the common fixed contact and the individual fixed contact are arranged side by side on the inner bottom surface of the storage part of the housing along the direction perpendicular to the lifting direction of the driving member, the sliding contact of the contact part of the fixed contact and the movable contact is extended. This allows for long strokes and increases the degree of freedom in design.

In addition, since the first contact portion and the second contact portion that independently fix the contact are formed in a stepped shape, and the first contact portion is formed to protrude upward from the second contact portion, it is possible to form an arc consumption device with a simple structure. Contact part, and stable contact can be obtained.

In addition, in the movable contact, since the contact pieces made of noble metal are fixed on the first, second, and third contact parts, the common fixed contact is clamped from both sides by these movable contacts to which the contact pieces are fixed. Sliding contact is performed by fixing the contact separately, so by providing a contact piece, it can also correspond to the consumption of the arc under high load, and because of the double-sided sliding structure, the contact is stable in a small area and the reliability is improved. In addition, since a single switch can be used for both the high-load area and the micro-area, changes during product updates can be easily performed.

Description of drawings

Fig. 1 is a sectional view showing a switchgear according to the present invention.

Fig. 2 is a sectional view of main parts of the switchgear according to the present invention viewed from a different direction.

Fig. 3 is a sectional view showing a case of the present invention.

Fig. 4 is a plan view showing a movable contact of the present invention.

Fig. 5 is a front view showing a movable contact of the present invention.

Fig. 6 is a cross-sectional view showing a state in which the contact portion for arc consumption according to the present invention is connected.

Fig. 7 is a cross-sectional view showing a state in which the switching contacts of the present invention are turned on.

Fig. 8 is a cross-sectional view showing a state in which the contact part for arc consumption according to the present invention is disconnected.

Fig. 9 is a sectional view showing a conventional switchgear.

In the figure: 1-housing, 1a-receiving part, 1b-spring buckle part, 1c-mounting hole, 2-common fixed contact, 2a-sliding contact part, 3-single fixed contact, 3a-the first sliding contact part , 3b-the second sliding contact part, 3c-the first contact part, 3d-the second contact part, 3e-notch part (non-conduction part), 4-wire harness, 5-covering parts, 6-return spring, 7-movable contact, 7a-base, 7b-first contact part, 7c-second contact part, 7d-third contact part, 8-contact piece, 9-driving part, 9a-holding part, 9b-spring clip Buckle part, 9c-pressing part, 10-cover body, 10a-opening, 11-sealing part, 11a-arch part, 12-cover part, 12a-through insertion hole.

Detailed ways

Hereinafter, an embodiment of the switch device according to the present invention will be shown with reference to FIGS. 1 to 8 . 1 is a sectional view showing a switchgear of the present invention, FIG. 2 is a sectional view of main parts viewed from different directions of the switchgear, FIG. 3 is a sectional view of a housing, FIG. 4 is a top view of a movable contact, and FIG. 5 is a movable contact. 6 is a cross-sectional view showing a state in which the contact part for arc consumption is connected, and FIG. 7 is a cross-sectional view showing a state in which the contact part for switching is connected. Cutaway view of the open state.

In FIGS. 1 to 3 , the case 1 is made of an insulating material such as synthetic resin, and is formed in a box shape with an open top surface having a storage portion 1 a inside. On the inner bottom surface of the accommodating portion 1 a of the case 1 , a flat plate-shaped common fixed contact 2 and an individual fixed contact 3 made of a conductive metal plate are erected toward the opening. In addition, the common fixed contact 2 and the individual fixed contact 3 are arranged side by side along the inner bottom surface (the direction perpendicular to the lifting and lowering direction of the driving member 9 described later).

The base of the common fixed contact 2 is embedded in the inner bottom of the housing 1 by means of insert molding, etc., and has a long sliding contact part 2a protruding in the storage part 1a and an output led out of the housing 1. terminal part (not shown). The surface of the common fixed contact 2 is plated with a conductive noble metal such as silver.

The above-mentioned single fixed contact 3 is similarly embedded in the inner bottom of the housing 1 by methods such as insert molding, and has a substantially "Z"-shaped first and second sliding contact parts 3a protruding from the storage part 1a. , 3b and an output terminal portion (not shown) leading out of the housing 1. The surface of the independent fixed contact 3 is also plated with good conductive noble metals such as silver.

The above-mentioned first and second sliding contact parts 3a, 3b are provided parallel to each other on the above-mentioned individual fixed contact point 3, and the front ends of the first and second sliding contact parts 3a, 3b are respectively formed as first and second contact parts 3c, 3d. In addition, a cutout portion 3e is provided on the bottom surface side of the first contact portion 3c and the first sliding contact portion 3a of the above-mentioned individual fixed contact 3 . By providing the notch portion 3e, the sliding contact range of the first sliding contact portion 3a becomes shorter than the sliding contact range of the second sliding contact portion 3b.

In addition, it is also possible to use an insulating material to provide a non-conductive area on the lower surface side of the first contact portion 3c and the first sliding contact portion 3a of the above-mentioned individual fixed contact 3 instead of the above-mentioned cutout portion 3e. The cutout portion 3e is integrally filled with the same synthetic resin as that of the case 1 during molding to form a non-conductive portion. At this time, since the second contact portion 7c of the movable contact 7 described later that slides in contact with the first sliding contact portion 3a does not fall into the notch portion 3e, the driving feeling is good.

In addition, the first contact portion 3c and the second contact portion 3d of the individual fixed contact 3 are formed in a stepped shape, and the first contact portion 3c is formed to protrude more upwardly than the second contact portion 3d. By providing steps in the first and second contact portions 3c, 3d of the individual fixed contact 3 in this way, the contact time when the contact portions of the movable contact 7 described later are in contact can be varied.

In addition, a wire harness 4 connected to the output terminal portion (not shown) of the housing 1 is arranged on the bottom surface side, and a detection signal is output through the wire harness 4 . Furthermore, a covering member 5 is fixed to the bottom surface side of the case 1 so as to cover the above-mentioned electric wire bundle 4 and the output terminal portion.

In addition, a spring hook portion 1b is provided on the storage portion 1a of the housing 1, and one end side of a coil-shaped return spring 6 is hooked to the spring hook portion 1b. In addition, a mounting hole 1c is formed on one side of the housing 1, and a screw is inserted into the mounting hole 1c to properly mount the switch device at a predetermined position.

As shown in FIGS. 4 and 5 , the movable contact 7 is formed into a clip shape by press-forging an elastic conductive metal plate. The movable contact 7 has a base portion 7a that is bent to form a rectangular ring-shaped connecting stack portion to face, and a first, second, and third portion extending from the base portion 7a and respectively formed in abutment with elastic force. Contact part 7b, 7c, 7d.

In addition, a contact piece 8 made of noble metal such as silver or silver alloy is fixed to the front ends of these first, second, and third contact portions 7b, 7c, and 7d.

The movable contact point 7 is in sliding contact with the common fixed contact point 2 and the individual fixed contact point 3 vertically arranged in the accommodating portion 1a, and the first contact point portion 7b is in sliding contact with the sliding contact portion 2a of the common fixed contact point 2. 2. The contact portion 7c is in sliding contact with the first sliding contact portion 3a of the individual fixed contact 3, and the third contact portion 7d is in sliding contact with the second sliding contact portion 3b of the individual fixed contact 3.

The driving member 9 is formed of an insulating material such as synthetic resin, and is housed in the housing portion 1a of the housing 1 so as to be able to move up and down. The driving member 9 is formed with a retaining portion 9a for retaining the movable contact 7 and a spring engaging portion 9b for retaining the other end side of the return spring 6. Elasticity pushes upwards. In addition, a pressing portion 9 c is provided on the upper surface side of the driving member 9 , and the pressing portion 9 c protrudes outward from the upper surface side of the housing 1 .

The cover body 10 is formed in a substantially rectangular flat plate shape from an insulating material such as synthetic resin, and is attached so as to close the opening of the housing portion 1 a of the housing 1 . In addition, an opening 10a is provided in the cover body 10, and the pressing portion 9c of the driving member 9 protrudes through the opening 10a.

Further, a sealing member 11 made of an elastic material such as rubber is attached to the upper surface side of the cover body 10 . A flexible arch portion 11 a is formed on the upper surface side of the sealing member 11 , and the front end of the arch portion 11 a is fixed to the upper end side of the pressing portion 9 c of the driving member 9 . Also, when the pressing portion 9c is pressed, the pressing portion 9c can move up and down by bending the arch portion 11a, and at the same time, can seal the gap between the opening 10a of the cover 10 and the pressing portion 9c.

In addition, a box-shaped cover member 12 formed of an insulating material such as synthetic resin and having an open bottom is fitted on the upper surface side of the housing 1 . The cover member 12 is formed with a through-hole 12a protruding from the pressing portion 9c of the driving member 9 and the arch portion 11a of the sealing member 11, and is fitted in a state where the pressing portion 9c and the arch portion 11a protrude from the through-hole 12a. on top of housing 1. At this time, the sealing member 11 is in a state of being elastically sandwiched between the case 1 and the cover member 12, thereby ensuring airtightness in the storage portion 1a.

Next, the operation of the switch device having the above configuration will be described with reference to FIGS. 6 to 8 .

First, in the initial state shown in FIG. 1 (the state in which the pressing portion 9c of the driving member 9 is not pressed), the driving member 9 is pushed upward by the elastic force of the return spring 6 . In this state, the first contact portion 7b of the movable contact 7 is in contact with the sliding contact portion 2a of the common fixed contact 2, and the second and third contact portions 7c, 7d are separated from the individual fixed contact 3, thereby disconnecting the circuit.

From this state, as shown in FIG. 6 , when the pressing portion 9 c of the driving member 9 is pressed, the driving member 9 moves downward against the urging force of the return spring 6 , and the movable contact 7 also moves downward. In addition, the first contact part 7b slides downward along the sliding contact part 2a of the common fixed contact 2, and at the same time, the second contact part 7c contacts the first contact part 3c of the individual fixed contact 3, so that the circuit is connected. At this time, if the load circuit connected to the switchgear is in a high load area, an arc will occur at the contact point.

Next, as shown in FIG. 7, when the pressing portion 9c is further pressed, as the second contact portion 7c of the movable contact 7 slides downward along the first sliding contact portion 3a of the individual fixed contact 3, the movement of the movable contact 7 The third contact portion 7d is in contact with the second contact portion 3b of the individual fixed contact 3 . At this time, since the second contact portion 7c of the movable contact 7 is already in contact with the first sliding contact portion 3a of the individual fixed contact 3, no arc occurs at the contact point. And, the circuit remains on.

Then, as shown in FIG. 8, when the pressing portion 9c is further pressed, the movable contact 7 slides downward along the second sliding contact portion 3b of the fixed contact 3 along with the third contact portion 7d of the movable contact 7. The second contact portion 7c slides downward along the first sliding contact portion 3a of the individual fixed contact 3, and moves toward the notch portion 3e provided on the lower surface side. Then, when the pressing portion 9c is pressed again, the second contact portion 7c of the movable contact 7 moves along the inside of the notch portion 3e while being separated from the first sliding contact portion 3a of the individual fixed contact 3 .

In this state, the common fixed contact 2 and the individual fixed contact 3 are connected by the first contact portion 7b and the third contact portion 7d of the movable contact 7, and the circuit is maintained in an on state.

At this time, the common fixed contact 2 and the individual fixed contact 3 are arranged side by side on the inner bottom surface of the housing portion 1a of the casing 1 along the direction perpendicular to the lifting direction of the driving member 9, and the common fixed contact 2 is arranged side by side in this way. With the individual fixed contact 3, the sliding contact surfaces of the common fixed contact 2 and the individual fixed contact 3, and the first and third contact parts 7b, 7d of the movable contact 7 can be extended, so that it can correspond to long strokes and the degree of freedom in design improve.

In addition, the above-mentioned single fixed contact 3, since the first contact portion 3c and the second contact portion 3d are formed in a stepped shape, and the first contact portion 3c is formed to protrude more upward than the second contact portion 3d, it can be formed with a simple structure. A contact portion for arc consumption is formed, and stable contact can be obtained.

In addition, at this time, the second contact portion 7c of the movable contact 7, which is a contact point where an arc occurs due to the switching of the high-load circuit, is in contact with the first contact portion 3c of the individual fixed contact 3. During the moving stroke, the first sliding contact part 3a of the single fixed contact 3 moves away from the above-mentioned notch part 3e, so it is possible to prevent excessive cutting caused by the sliding contact between the rough contact surfaces due to arc consumption , To improve the durability, at the same time can get a good running feeling.

In addition, arc consumption does not occur on the second contact portion 3d and second sliding contact portion 3b of the independent fixed contact 3 for circuit switching, and the third contact portion 7d of the movable contact 7 that is in sliding contact therewith. Good sliding between the contact surfaces can be obtained, and a long life of the contact can be achieved.

When the pressing force on the pressing portion 9c is released from the state of FIG. 8 , the driving member 9 is moved upward by the elastic force of the return spring 6 and returns to the initial state shown in FIG. 1 . At this time, the movable contact 7 also moves to the initial position together with the driving member 9, and the second and third contact portions 7c, 7d are separated from the single fixed contact 3, and the circuit is turned off.

According to the structure of the above-mentioned embodiment, the first contact part 7b which is in sliding contact with the common fixed contact 2, the second and third contact parts 7c which are in sliding contact with the above-mentioned individual fixed contact 3 are formed on the movable contact 7, 7d, on the above-mentioned individual fixed contact 3, a first contact portion 3c for arc consumption first contacting the above-mentioned second contact portion 7c is formed along a direction perpendicular to the lifting direction of the above-mentioned driving member 9, and thereafter contacting the above-mentioned The second contact portion 3d that the third contact portion 7d contacts has the lower surface side of the second contact portion 3d as a sliding contact surface with the third contact portion 7d, and the lower surface side of the first contact portion 3c with the The notch 3e, which is a non-conductive portion separated from the second contact portion 7c, is formed on the track of the sliding contact of the second contact portion 7c. Therefore, even in high-load use, due to the arc generated when the corresponding contact is switched Since the first contact portion 3c for arc consumption is provided, the consumption on the second contact portion 3d that normally switches is reduced to obtain stable contact and achieve long life of the contact.

In addition, since the notch 3e is formed on the sliding contact track on the bottom side of the arc contact point, cutting between contacts due to arc consumption can be prevented and durability can be improved.

In addition, contact pieces 8 made of precious metals are fixed on the first, second, and third contact portions 7b, 7c, and 7d of the above-mentioned movable contact 7. Sliding contact along the above-mentioned common fixed contact 2 and individual fixed contact 3 in a clamping manner, so by setting the contact piece 8 can correspond to the consumption of the arc at the time of high load, and because the movable contact 7 is a clip-shaped double-sided sliding structure, Therefore, even in a small area, the contact is stable and the reliability is improved. In addition, since a single switch can be used for both the high-load area and the micro-area, it is easy to change when updating the customer's product.

In addition, in the above-mentioned embodiment, the above-mentioned notch portion 3e is formed on the lower surface side of the first sliding contact portion 3a of the above-mentioned individual fixed contact 3, thereby preventing excessive cutting caused by sliding between the contact surfaces roughened by arc consumption. However, instead of the notch 3e, the non-conductive portion may be formed by integrally filling the notch 3e with the same synthetic resin as that of the case 1 when the case 1 is molded.

In addition, for arc consumption during switching, the first contact portion 3c and the second contact portion 3d of the above-mentioned individual fixed contact 3 are provided in a stepped shape, and the second contact portion of the first contact portion 3c and the movable contact 7 is formed. The contact of 7c is earlier than the contact of the second contact part 3d and the third contact part 7d of the movable contact 7, but the first and second contact parts 3c, 3d of the fixed contact 3 may not be set in a stepped shape, Furthermore, the lengths of the second and third contact portions 7c and 7d of the movable contact 7 are changed to form a stepped shape.

Claims (5)

1. A switch device, characterized in that: It includes: a housing with a storage portion, a common fixed contact point and a single fixed contact point erected from the inner bottom surface of the storage portion, a driving component that can be lifted and lowered in the housing, and the driving component that is held on the driving component and moves along with it. The movable contact that is in sliding contact with the above-mentioned common fixed contact and the individual fixed contact due to the lifting movement of the driving part; The movable contact is formed with a first contact portion which is in sliding contact with the common fixed contact, and a second and a third contact portion which are in sliding contact with the individual fixed contact. In the direction perpendicular to the lifting direction, a first contact portion for arc consumption first contacting the second contact portion, and a second contact portion subsequently contacting the third contact portion are formed, and the second contact portion The lower surface side of the part is set as a contact surface for sliding contact with the third contact part, and at the same time, on the trajectory of the sliding contact with the second contact part on the lower surface side of the first contact part, there is formed a disengagement from the second contact part. non-conductive part. 2. The switch device according to claim 1, wherein a cutout continuous to the lower surface side of the first contact portion is formed in the individual fixed contact, and the non-conduction portion is formed by the cutout. 3. The switch device according to claim 1 or 2, wherein the common fixed contact and the individual fixed contact are arranged side by side in the storage portion of the housing along a direction perpendicular to the lifting direction of the driving member. inner bottom surface. 4. The switch device according to claim 1 or 2, characterized in that: the first contact portion and the second contact portion of the individual fixed contact are formed in a stepped shape, and the first contact portion is formed to be larger than the first contact portion. 2 The contact portion protrudes upward. 5. The switch device according to claim 1 or 2, characterized in that contact pieces made of noble metal are fixed to the first, second and third contact portions of the movable contact, and contact pieces are fixed by these. The movable contact of the contact piece sandwiches the common fixed contact and the individual fixed contact from both sides for sliding contact.

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