JP4295599B2 - Switch device - Google Patents

Description

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

  As a structure of a conventional switch device, since a lamp load needs to be switched, a microswitch type detection switch that can be used in a high load region is used (for example, see Patent Document 1).

  Hereinafter, the structure of a conventional microswitch type switch device used for in-vehicle use 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 the drawing, the switch device includes a base 51 and a cover 53 that constitute a housing 51. Contacts 56, 57, 58 are inserted into the base 52, and one end of each contact protrudes outward to form connection contacts 60, 61, 62. Further, the contacts 57 and 58 are arranged to face the vertical position.

  One end of a movable contact 64 is fixed to the contact 56, the movable contact 64 is disposed in a state of being folded back by a metal sheet, and spherical contacts 65 are provided on the upper and lower sides of the other end side. The spherical contact 65 is located between the contacts 57 and 58, and the upper side is in contact with the contact 58.

A switching tappet 67 is movably guided in the opening 66 on the upper surface of the cover 53. The switching tappet 67 has a horizontally supported lever 68, which is urged upward by the spring action of the movable contact 64 and is held directly below the cover 53.
Further, a rubber bellows 72 is mounted around the opening 66 of the cover 53, and the rubber bellows 72 and the upper part of the switching tappet 67 are fitted to seal the inside of the switch.

  When the switching tappet 67 is actuated, the movable contact 64 is pushed downward, and when the switching point is exceeded, the movable contact 64 is reversed, the spherical contact 65 moves downward, contacts the contact 57, and the contact is switched. When the switch is released from this state, the movable contact 64 is reversed again to return to the initial state.

JP-A-7-73776

Conventionally, the switch device for lighting the lamp when opening and closing the door of an automobile has been supported by a micro-switch type switch device in a high load area, but nowadays it has become electronic in the automobile market and can be used in a minute area There is a need for a new switching device. In this case, because of the problem of contact reliability, the micro-switch type switch device in the high load region cannot be used in the micro region, and therefore a dedicated switch device in the micro region has been used separately.
For this reason, a dedicated switch device must be used for each application, and it is necessary to reexamine the switch device to be used when changing the model of a car. When a change to the area occurs, there is a problem that a large change is unavoidable.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide a switch device that can cope with both a high load region and a minute region, is strong against arc consumption at a high load, and can obtain a stable contact. And

In order to solve the above-mentioned problems, the present invention provides as a first solution means a housing having a storage portion, a common fixed contact and an individual fixed contact erected from the inner bottom surface of the storage portion, and being able to move up and down in the housing. And a movable contact held by the drive member and slidably contacting the common fixed contact and the individual fixed contact as the drive member moves up and down. The movable contact includes the common fixed contact and the sliding contact. A first contact portion that is in contact with each other and an independent second and third contact portions that are individually slidably contacted with the individual fixed contact are formed, and the individual fixed contact is along a direction orthogonal to the ascending / descending direction of the drive member. Te contact, a first contact portion for arc wasting come in contact with the second contact portion, and the third contact portion later than contact with said first contact portion and second contact portion forming a second contact portion such that The lower surface side of the second contact portion is a sliding contact surface with the third contact portion, and on the sliding contact locus with the second contact portion on the lower surface side of the first contact portion, The second contact portion is separated from the non-conductive portion.

Further, as a second solution, the individual fixed contact is formed with a continuous notch on the lower surface side of the first contact part, and the non-conduction part is formed with the notch. .
As a third solution, the common fixed contact and the individual fixed contact are arranged in parallel along the direction orthogonal to the ascending / descending direction of the drive member on the inner bottom surface of the housing housing portion. .

Further, as a fourth solution, the individual fixed contact includes the first contact portion and the second contact portion formed in a step shape, and the first contact portion is located above the second contact portion. The structure is formed so as to protrude to the side.
As a fifth solution, a contact tip made of a noble metal is fixed to the first, second, and third contact portions of the movable contact, and the common contact is made by the movable contact to which the contact tip is fixed. The fixed contact and the individual fixed contact are sandwiched from both sides to be in sliding contact.

As described above, the switch device of the present invention includes a housing having a storage portion, a common fixed contact and an individual fixed contact erected from the inner bottom surface of the storage portion, a drive member that is housed in a manner that can be raised and lowered in the housing, The movable contact includes a movable contact that is held by the drive member and that is in sliding contact with the common fixed contact and the individual fixed contact as the drive member is moved up and down. The movable contact includes a first contact portion that is in sliding contact with the common fixed contact, and an individual fixed contact. The second and third contact portions are formed in sliding contact with each other, and the first contact for arc consumption that comes into contact with the second contact portion quickly along the direction perpendicular to the ascending / descending direction of the driving member is formed on the individual fixed contact. And a second contact portion that comes into contact with the third contact portion later than the first contact portion, the lower surface side of the second contact portion is used as a sliding contact surface with the third contact portion, and the first contact portion The second contact is on the sliding contact locus with the second contact portion on the lower surface side of the contact portion. Since a non-conducting part that is separated from the part is formed, a contact part for arc consumption is provided for handling arcs that occur when switching contacts even when used at high loads. Since the wear on the part is reduced and stable contact is obtained, the life of the contact can be extended.
In addition, since the non-conductive portion with the contact portion is formed on the sliding contact locus on the lower surface side of the arc contact point, the contacts can be prevented from being scraped by arc consumption, and the durability is improved.

In addition, the individual fixed contact is formed with a continuous notch portion on the lower surface side of the first contact portion, and a non-conducting portion is formed by this notch portion, so that the sliding contact on the lower surface side of the arc contact point is formed. By cutting out the locus, it is possible to prevent the contacts from being scraped by arc consumption with a simple configuration.
In addition, since the common fixed contact and the individual fixed contact are arranged in parallel along the direction orthogonal to the ascending / descending direction of the driving member on the inner bottom surface of the housing housing portion, the contact portion of each fixed contact and movable contact Since a long sliding contact surface is provided, it is possible to cope with a long stroke, and the degree of freedom in design is improved.

In addition, the individual fixed contact is simple because the first contact portion and the second contact portion are formed in a stepped shape, and the first contact portion is protruded from the second contact portion to the upper surface side. The contact part for arc consumption can be formed by the configuration, and stable contact can be obtained.
In addition, a contact tip made of a noble metal is fixed to the first, second, and third contact portions of the movable contact, and the common fixed contact and the individual fixed contact are sandwiched from both sides by the movable contact to which these contact tips are fixed. Therefore, the contact tip can be provided to cope with arc wear during high loads, and the double-sided sliding structure stabilizes the contact even in a minute region and improves the reliability. In addition, since it is possible to cope with both a high load area and a minute area with a single switch, it is possible to easily change the model.

  Embodiments of the switch device of the present invention are shown in FIGS. 1 is a cross-sectional view of the switch device of the present invention, FIG. 2 is a cross-sectional view of an essential part of the switch device viewed from different directions, FIG. 3 is a cross-sectional view of a housing, FIG. FIG. 6 is a cross-sectional view showing a state where the contact portion for arc consumption is turned on, FIG. 7 is a cross-sectional view showing a state where the contact portion for switching is turned on, and FIG. 8 is turned off from the contact portion for arc consumption. It is sectional drawing which shows a state.

  1 to 3, the housing 1 is made of an insulating material such as a synthetic resin, and is formed in a box shape with an upper surface opening having an accommodating portion 1a therein. On the inner bottom surface of the housing 1a of the housing 1, a flat common fixed contact 2 made of a conductive metal plate and an individual fixed contact 3 are erected toward the opening. Further, the common fixed contact 2 and the individual fixed contact 3 are arranged in parallel along the inner bottom surface (a direction perpendicular to the ascending / descending direction of a driving member 9 described later).

  The common fixed contact 2 has a base portion embedded in the inner bottom portion of the housing 1 by a method such as insert molding, a long slidable contact portion 2a protruding into the storage portion 1a, and outward of the housing 1. And a derived output terminal portion (not shown). The surface of the common fixed contact 2 is plated with a highly conductive noble metal such as silver.

  Similarly, the individual fixed contact 3 has a base portion embedded in the inner bottom portion of the housing 1 by a method such as insert molding, and is substantially Z-shaped first and second sliding contact portions 3a protruding into the storage portion 1a. 3b and an output terminal portion (not shown) led out of the housing 1. The surface of the individual fixed contact 3 is also plated with a highly conductive noble metal such as silver.

  The individual fixed contact 3 is provided with the first and second sliding contact portions 3a and 3b in parallel with each other, and the tips of the first and second sliding contact portions 3a and 3b are respectively first. And second contact portions 3c and 3d. Further, a notch portion 3e is provided on the lower surface side of the first contact portion 3c and the first sliding contact portion 3a of the individual fixed contact 3. By providing the notch portion 3e, the sliding contact range of the first sliding contact portion 3a is formed to be shorter than the sliding contact range of the second sliding contact portion 3b.

  Further, instead of providing the notch portion 3e on the lower surface side of the first contact portion 3c and the first sliding contact portion 3a of the individual fixed contact 3, a non-conductive region is provided using an insulating material. In this case, a non-conductive portion may be formed by filling the cutout portion 3e with the same synthetic resin as the material of the housing 1 at the time of molding. In this case, since the second contact portion 7c of the movable contact 7 to be described later that makes sliding contact with the first sliding contact portion 3a does not fall into the notch portion 3e, the operation feeling becomes good.

  The individual fixed contact 3 is formed such that the first contact portion 3c and the second contact portion 3d are stepped, and the first contact portion 3c is the second contact portion. It is formed in a state of protruding to the upper surface side from 3d. Thus, by providing a step in the first and second contact portions 3c and 3d of the individual fixed contact 3, it becomes possible to vary the contact timing when the contact portion of the movable contact 7 described later contacts. Yes.

  A harness 4 connected to the output terminal portion is disposed on the bottom surface side of the housing 1 from which an output terminal portion (not shown) is led, and a detection signal is output by the harness 4. It will be a thing. A covering member 5 is fixed to the bottom surface side of the housing 1 so as to cover the harness 4 and the output terminal portion.

  Further, the housing 1a of the housing 1 is provided with a spring locking portion 1b, and one end side of the coiled return spring 6 is locked to the spring locking portion 1b. A mounting hole 1c is formed on one side of the housing 1, and a screw or the like is inserted into the mounting hole 1c so that the switch device is appropriately mounted at a predetermined location.

As shown in FIGS. 4 and 5, the movable contact 7 is formed in a clip shape by punching and forming a conductive metal plate having a spring property. The movable contact 7 is formed by a base portion 7a which is formed by bending and opposing a rectangular ring-shaped crosspiece, and a base portion 7a extending from the base portion 7a. 1 and second and third contact portions 7b, 7c and 7d.
Further, a contact tip 8 made of a noble metal such as silver or silver alloy is fixed to the tips of the first, second and third contact portions 7b, 7c and 7d.

  The movable contact 7 is in sliding contact with the common fixed contact 2 and the individual fixed contact 3 erected on the storage portion 1 a, and the first contact portion 7 b is in sliding contact with the common fixed contact 2. The second contact portion 7 c is slidably contacted with the first slidable contact portion 3 a of the individual fixed contact 3, and the third contact portion 7 d is slidably contacted with the individual fixed contact 3. Each is in sliding contact with the portion 3b.

  The drive 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 movable up and down. The drive member 9 is formed with a holding portion 9 a that holds the movable contact 7 and a spring locking portion 9 b that is locked to the other end of the return spring 6. It is biased upward by the elastic force of the return spring 6. A pressing portion 9 c is provided on the upper surface side of the drive member 9, and the pressing portion 9 c protrudes outward on the upper surface side of the housing 1.

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

  A shield member 11 made of an elastic material such as rubber is attached to the upper surface side of the lid body 10. A flexible dome portion 11 a is formed on the upper surface side of the shield member 11, and the tip of the dome portion 11 a is fixed to the upper end side of the pressing portion 9 c of the driving member 9. And when this press part 9c is pressed, while the said dome part 11a bends, while allowing the press part 9c to move up and down, the clearance gap between the opening 10a of the said cover 10 and the press part 9c is made. It comes to shield.

  Further, a cover member 12 formed in a box shape with an opening on the lower surface is fitted on the upper surface side of the housing 1 with an insulating material such as synthetic resin. The cover member 12 is formed with an insertion hole 12a from which the pressing portion 9c of the driving member 9 and the dome portion 11a of the shield member 11 protrude, and the pressing portion 9c and the dome portion 11a protrude from the insertion hole 12a. In the state, it is fitted on the upper surface of the housing 1. At this time, the shield member 11 is sandwiched between the housing 1 and the cover member 12 with an elastic force, and the confidentiality in the storage portion 1a is maintained.

Next, the operation of the switch device configured as described above will be described with reference to FIGS.
First, in the initial state shown in FIG. 1 (a state where the pressing portion 9 c of the driving member 9 is not pressed), the driving member 9 is urged upward by the elastic force of the return spring 6. In this state, the first contact portion 7 b of the movable contact 7 is in contact with the sliding contact portion 2 a of the common fixed contact 2, and the second and third contact portions 7 c and 7 d are separated from the individual fixed contact 3. The circuit is off.

  From this state, as shown in FIG. 6, when the pressing portion 9c of the drive member 9 is pressed, the drive member 9 is moved downward against the urging force of the return spring 6, and the movable contact 7 is also moved downward. To do. The first contact portion 7b slides downward on the sliding contact portion 2a of the common fixed contact 2, and the second contact portion 7c contacts the first contact portion 3c of the individual fixed contact 3 to turn on the circuit. . At this time, when the load circuit connected to the switch device is in a high load region, an arc is generated at this contact point.

Next, as shown in FIG. 7, when the pressing portion 9 c is further pressed, the second contact portion 7 c of the movable contact 7 slidably contacts the first sliding contact portion 3 a of the individual fixed contact 3 downward. with it, the third contact portion 7d of the movable contact 7 contacts the second contact portion 3d of the individual fixed contact 3. At this time, since the second contact portion 7c of the movable contact 7 and the first sliding contact portion 3a of the individual fixed contact 3 are already in contact, no arc is generated at this contact point. The circuit is kept on.

Next, as shown in FIG. 8, when the pressing portion 9 c is further pressed, the third contact portion 7 d of the movable contact 7 slides downward on the second sliding contact portion 3 b of the individual fixed contact 3. Accordingly, the second contact portion 7c of the movable contact 7 slides downwardly on the first sliding contact portion 3a of the individual fixed contact 3 and moves to the notch portion 3e provided on the lower surface side. When the pressing portion 9c is further pressed, the second contact portion 7c of the movable contact 7 moves within the cutout portion 3e in a state where the first sliding contact portion 3a of the individual fixed contact 3 is removed. It becomes.
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 the ON state.

  In this case, the common fixed contact 2 and the individual fixed contact 3 are arranged in parallel along the direction perpendicular to the ascending / descending direction of the drive member 9 on the inner bottom surface of the housing portion 1a of the housing 1, as described above. By arranging the common fixed contact 2 and the individual fixed contact 3 in parallel, the sliding contact surface between the common fixed contact 2 and the individual fixed contact 3 and the first and third contact portions 7b and 7d of the movable contact 7 is provided. Can be made long, so that it is possible to cope with a long stroke, and the degree of freedom in design is improved.

  The individual fixed contact 3 has a first contact portion 3c and a second contact portion 3d formed in a stepped shape, and the first contact portion 3c protrudes from the second contact portion 3d to the upper surface side. Therefore, the contact portion for arc consumption can be formed with a simple configuration, and stable contact can be obtained.

  At this time, the second contact portion 7c of the movable contact 7 that contacts the first contact portion 3c of the individual fixed contact 3, which is a contact point where an arc is generated by switching of the high load circuit, is switched by the switch device. During the movement stroke, the contact surfaces that have been rough due to arc wear are slid because the individual fixed contact 3 moves away from the first sliding contact portion 3a and moves in the cutout portion 3e. Excessive shaving can be prevented, durability is improved, and a good operational feeling is obtained.

  Further, since the second contact part 3d and the second slidable contact part 3b of the individual fixed contact 3 and the third contact part 7d of the movable contact 7 slidably in contact therewith are not used for circuit switching. Since good sliding between the contact surfaces can be obtained, the contact life can be extended.

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

According to the configuration of the above-described embodiment, the movable contact 7 has the first contact portion 7b slidably in contact with the common fixed contact 2, the second and third contact portions 7c slidably in contact with the individual fixed contact 3, A first contact portion 3c for arc consumption that quickly contacts the second contact portion 7c along the direction perpendicular to the ascending / descending direction of the driving member 9 to the individual fixed contact 3; A second contact portion 3d that comes into contact with the third contact portion 7d is formed later than this, and the lower surface side of the second contact portion 3d is used as a slidable contact surface with the third contact portion 7d. At the same time, the notch portion 3e serving as a non-conductive portion that separates from the second contact portion 7c is formed on the sliding contact locus with the second contact portion 7c on the lower surface side of the first contact portion 3c. Therefore, even when used at high loads, it can handle arcs that occur when switching contacts. In addition, since the first contact portion 3c for arc consumption is provided, since the consumption to the normal second contact portion 3d for switching is reduced and stable contact is obtained, the length of the contact is increased. Life expectancy can be improved.
In addition, since the cutout portion 3e is formed on the sliding contact locus on the lower surface side of the arc contact point, it is possible to prevent the contacts from being scraped due to arc consumption, and the durability is improved.

  The movable contact 7 has a contact tip 8 made of a noble metal fixed to the first, second and third contact portions 7b, 7c and 7d, and the movable contact 7 to which the contact tip 8 is fixed. Since the common fixed contact 2 and the individual fixed contact 3 are sandwiched from both sides and slidably contacted, the contact tip 8 can be provided to cope with arc consumption during high loads, and the movable contact 7 has a clip shape. Because of this double-sided sliding structure, the contact is stable even in a minute region and the reliability is improved. In addition, since it is possible to deal with both a high load area and a minute area with a single switch, it is possible to easily change the model at the customer.

  In the above embodiment, the notch portion 3e is formed on the lower surface side of the first sliding contact portion 3a of the individual fixed contact 3, and the contact surfaces rough due to arc consumption slide and are excessive. In this case, instead of the cutout portion 3e, the cutout portion 3e is integrally filled with the same synthetic resin as the material of the housing 1 instead of the cutout portion 3e. A non-conductive portion may be formed.

  Further, for arc consumption at the time of switching, the first contact portion 3c and the second contact portion 3d of the individual fixed contact 3 are stepped so that the second contact of the first contact portion 3c and the movable contact 7 is a second step. The contact portion 7c is formed so as to come into contact earlier than the second contact portion 3d and the third contact portion 7d of the movable contact 7, but the first and second contact portions of the individual fixed contact 3 are formed. The second and third contact portions 7c and 7d of the movable contact 7 may be formed in steps with different lengths, without forming steps 3c and 3d.

It is sectional drawing which shows the switch apparatus of this invention. It is principal part sectional drawing which looked at the switch apparatus of this invention from the different direction. It is sectional drawing which shows the housing of this invention. It is a top view which shows the movable contact of this invention. It is a front view which shows the movable contact of this invention. It is sectional drawing which shows the state which the contact part for arc consumption of this invention turned on. It is sectional drawing which shows the state which the contact part for switching of this invention turned on. It is sectional drawing which shows the state turned off from the contact part for arc consumption of this invention. It is sectional drawing which shows the conventional switch apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Housing 1a: Storage part 1b: Spring latching part 1c: Mounting hole 2: Common fixed contact 2a: Sliding contact part 3: Individual fixed contact 3a: 1st sliding contact part 3b: 2nd sliding contact part 3c: 1st contact part 3d: 2nd contact part 3e: Notch part (non-conduction part)
4: Harness 5: Cover member 6: Return spring 7: Movable contact 7a: Base 7b: First contact 7c: Second contact 7d: Third contact 8: Contact tip 9: Drive member 9a: Holding Part 9b: Spring locking part 9c: Pressing part 10: Lid 10a: Opening 11: Shield member 11a: Dome part 12: Cover member 12a: Insertion hole

Claims (5)

A housing having a storage portion, a common fixed contact and an individual fixed contact erected from the inner bottom surface of the storage portion, a drive member housed in the housing so as to be able to be raised and lowered, and an elevation of the drive member held by the drive member A movable contact that slides in contact with the common fixed contact and the individual fixed contact as it moves is provided. The movable contact includes a first contact portion that slides in contact with the common fixed contact, and the individual fixed contact separately. independent to form the second and third contact portions contact said the individual fixed contact, along a direction orthogonal to the elevating direction of the drive member, first for arc wasting come in contact with the second contact portion The second contact portion is formed so as to come into contact with the third contact portion after the contact between the first contact portion, the second contact portion, and the first contact portion. The lower surface side of the part is the sliding contact surface with the third contact part While, on the sliding contact path between the second contact portion of the lower surface side of the first contact portion, the switch device characterized by the formation of the non-conductive portion to leave said second contact portion.   2. The switch device according to claim 1, wherein the individual fixed contact is formed with a continuous notch on the lower surface side of the first contact part, and the non-conduction part is formed with the notch. .   The said common fixed contact and the said individual fixed contact are arrange | positioned in parallel along the direction orthogonal to the raising / lowering direction of the said drive member at the inner bottom face of the accommodating part of the said housing. Switch device.   The individual fixed contact is formed by forming the first contact portion and the second contact portion in a step shape, and projecting the first contact portion to the upper surface side from the second contact portion. The switch device according to any one of claims 1 to 3.   A contact tip made of a noble metal is fixed to the first, second and third contact portions of the movable contact, and the common fixed contact and the individual fixed contact are double-sided by the movable contact to which these contact tips are fixed. The switch device according to any one of claims 1 to 4, wherein the switch device is slidably contacted from the side.

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