JP6599693B2 - Switch device - Google Patents

Description

  The present invention relates to a switch device used for a transmission switch for automobiles and the like.

  2. Description of the Related Art Conventionally, there are some switch devices that are arranged at positions where transmission oil is applied as transmission switches for automobiles, such as back lamp switches, neutral switches, and the like that detect shift positions. Since these switch devices are arranged at a position where the pumped-up oil is applied, an operation part that operates in contact with a transmission cam or the like and a contact part are separated by a diaphragm so that the oil does not enter the contact part. It is separated. In such a switch device, even if oil enters the operating part, the oil is discharged according to the operation of the operating part.

  In addition, the above-described switch device has a contact between the head portion that can protrude from the switch body and the diaphragm so that the contact portion is not destroyed by the overload when an overload occurs on the operation portion. There is a structure in which an overload absorbing mechanism that absorbs an overstroke by disposing a contact portion (rod portion) and disposing a spring therebetween (see, for example, Patent Document 1).

JP 2002-298695 A

  However, in the overload absorbing mechanism as in Patent Document 1, the contact portion is slidably accommodated in the head portion on the distal end side of the operating portion. Therefore, in the conventional switch device, when oil enters between the head portion and the contact portion, the operation of the contact portion with respect to the head portion is hindered, and the overload absorbing mechanism does not function. As a result, the contact portion may be destroyed.

  An object of the present invention is to provide a switch device in which the operation of the head portion and the contact portion is not hindered and the overload absorbing mechanism can operate normally even if oil enters between the head portion and the contact portion of the operation portion. Is to provide.

The present invention solves the above problems by the following means. In addition, in order to make an understanding easy, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this.
The invention according to claim 1 is accommodated in the switch body (1) and is movable between the protruding position and the operating position, and the operating part (2) is moved to the operating position. The movable contact unit (8, 9, 10) having a movable contact (10) that contacts the fixed contact (11) disposed in the switch body (1) in conjunction with the actuator, the actuating part (2), and the movable An operation chamber (1c) arranged between the contact unit (8, 9, 10) and the operation unit (2) is arranged, and a contact chamber arranged the movable contact unit (8, 9, 10). By energizing the diaphragm (6) separating the inside of the switch body (1) and the movable contact unit (8, 9, 10) to (7a), the operating part (2) is moved to the protruding position. A first urging member (12) for urging the actuator (2), A head part (3) that can project from the switch body (1), and one end part (4a) are movably accommodated in the head part (3) with respect to the head part (3), and the other end part ( 4b) is disposed between the abutting portion (4) disposed so as to abut on the diaphragm (6), the head portion (3), and the abutting portion (4), and the first urging force is provided. A second urging member (5) having a larger urging force than the member (12), and a communication portion (in which the inside of the head portion (3) communicates with the inside of the working chamber (1c) ( 4c) is provided in at least one of the head part (3) and the contact part (4), and the communication part (4c) slides with the head part (3) of the contact part (4). The switch device (100) is characterized by being formed by a concave groove formed on a sliding surface.

The invention of claim 2 is the switching device according to claim 1, wherein the communicating portion (4c) is that provided in plural, a switch device according to claim (100).

  According to the present invention, even if oil enters between the head portion and the contact portion of the operating portion, the switch device does not hinder the operation of the head portion and the contact portion, and the overload absorbing mechanism is operated normally. It can operate and can improve reliability.

It is sectional drawing which shows embodiment of the switch apparatus 100 by this invention. It is a side view of the rod part 4. FIG. It is the figure which looked at the rod part 4 from the front end side. It is sectional drawing of the switch apparatus 100 in a full stroke state.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment)
FIG. 1 is a cross-sectional view showing an embodiment of a switch device 100 according to the present invention.
In addition, each figure shown below including FIG. 1 is the figure shown typically, and the magnitude | size and shape of each part are exaggerated suitably for easy understanding.
In the following description, specific numerical values, shapes, materials, and the like are shown and described, but these can be changed as appropriate.
In the following description, the left side in FIG. 1 is referred to as the front end side, and the right side in FIG. 1 is referred to as the rear end side.

  The switch device 100 of the present embodiment includes a switch body 1, an operating unit 2, a diaphragm 6, a spacer 7, a slider 8, a contact plate 9, a movable contact 10, a fixed contact 11, and a first biasing force. A member 12, a terminal base 13, a first conductive member 14, a second conductive member 15, a cord grommet 16, and a guard cover 17 are provided.

The switch body 1 is a member that serves as a base of the switch device 100. The switch body 1 is formed in a substantially cylindrical shape having a space penetrating through the central portion thereof, and in the space portion, an operating portion 2, a diaphragm 6, a spacer 7, a slider 8, a contact plate 9, and a movable member. The contact 10, the fixed contact 11, the first urging member 12, the terminal base 13, and the first conductive member 14 are accommodated.
The switch body 1 has a threaded portion 1a on the outer peripheral surface on the tip side. Using this threaded portion 1a, the switch device 100 is attached to a transmission, for example.
Further, the switch body 1 has a fitting hole 1b fitted to the head portion 3 on the tip side and a working chamber 1c having a diameter larger than that of the fitting hole 1b, and the fitting hole 1b and the working chamber 1c. The step portion 1d at the boundary between the head portion 3 abuts on the step portion 3c of the head portion 3 and regulates the position of the head portion 3.
A spacer insertion hole 1e is formed on the rear end side of the switch body 1 further on the rear end side than the working chamber 1c.

  The operating unit 2 includes a head unit 3, a rod unit 4, and a second urging member 5. The actuating part 2 is accommodated in the switch body 1, and is fixed to a projecting position where the head part 3 projects from the switch body 1 to the front end side, and the movable contact 10 described later when the head part 3 is pushed to the rear end side. It is provided so as to be movable between the operating positions where the contact 11 comes into contact.

The head portion 3 is fitted in the switch body 1 so that the straight movement can be smoothly performed between the protruding position and the operating position. The distal end portion of the head portion 3 normally protrudes from the switch body 1 toward the distal end side by an urging force of a first urging member described later. Moreover, the head part 3 can move to the rear end side (operating position) when an external force is applied to the front end part toward the rear end side.
The head portion 3 is formed with a fitting portion 3a that fits into the fitting hole 1b of the switch body 1 on the tip side. The intermediate part 3b formed to have a larger outer diameter than the fitting part 3a is configured to form a slight gap between the switch body 1 and the working chamber 1c. The step portion 3c at the boundary between the fitting portion 3a and the intermediate portion 3b abuts on the step portion 1d of the switch body 1 as described above, and the head portion 3 is restricted from moving further to the tip side from that position. To do.
Furthermore, the head portion 3 has a fitting hole 3d opened in the rear end side. The rod portion 4 is slidably fitted in the fitting hole 3d.

FIG. 2 is a side view of the rod portion 4.
FIG. 3 is a view of the rod portion 4 as viewed from the distal end side.
The rod part (contact part) 4 has a fitting part 4a, a small diameter part 4b, a communication part 4c, and an urging member accommodating part 4d.
The fitting portion 4 a is provided in the vicinity of the end portion on the distal end side of the rod portion 4, and is fitted and accommodated in a fitting hole 3 d in the head portion 3 so as to be movable with respect to the head portion 3.
The small-diameter portion 4b is on the rear end side with respect to the fitting portion 4a, and has an outer diameter smaller than that of the fitting portion 4a. The end portion on the most rear end side of the small diameter portion 4 b abuts on the diaphragm 6.
The communication portion 4c is formed in a concave groove shape that is recessed toward the center from the sliding surface that slides with the head portion 3 of the fitting portion 4a. The communication part 4c communicates the inside of the head part 3 (the space formed on the tip side of the fitting hole 3d with respect to the fitting part 4a) and the inside of the working chamber 1c. In the present embodiment, four communication portions 4c are provided at equal intervals in the circumferential direction.
The urging member accommodating portion 4d is a space that is opened to the front end side and accommodates the second urging member 5.

  The rear end side of the second biasing member 5 is accommodated in the biasing member accommodating portion 4 d of the rod portion 4, and the distal end side is in contact with the head portion 3 and is disposed between the head portion 3 and the rod portion 4. The compression coil spring is formed. The second urging member 5 has a larger urging force than a first urging member 12 described later. Furthermore, the urging force of the second urging member 5 is smaller than the limit force that would damage each component in the contact chamber 7a when the front end side of the slider 8 is pushed to the rear end side. ing. Therefore, even if an overload is applied that pushes the front end side of the head portion 3 further to the rear end side than the predetermined position, the rod portion 4 is more than a predetermined force by further compressing the second urging member 5. Thus, the head portion 3 can move to the rear end side without pressing the slider 8. Thus, since the operation part 2 was made into the structure containing an overload absorption mechanism using the head part 3, the rod part 4, and the 2nd biasing member 5, each structural member inside the contact chamber 7a is caused by overload. It can be prevented from being damaged.

  The diaphragm 6 is disposed between the operation unit 2 and the slider 8 and is configured by an elastically deformable member such as rubber. The outer periphery of the diaphragm 6 is fixed by being sandwiched between the switch body 1 and the spacer 7. The diaphragm 6 is switched to an operation chamber 1 c in which the operation unit 2 is disposed and a contact chamber 7 a described later in which the slider 8 is disposed. The inside of the main body 1 is separated. By providing this diaphragm 6, oil that has entered from the gap between the switch body 1 and the head portion 3 is prevented from entering the contact chamber 7 a.

The spacer 7 is inserted into the spacer insertion hole 1 e of the switch body 1. The spacer 7 has a contact chamber 7a opened on the rear end side and a fitting hole 7b opened on the front end side.
In the contact chamber 7a, a slider 8, a contact plate 9, a movable contact 10, a fixed contact 11, a first biasing member 12, and a first conductive member 14 are arranged.
A fitting portion 8a on the tip end side of the slider 8 is slidably fitted into the fitting hole 7b.

The slider 8 has a fitting portion 8a, a plate holding portion 8b, and an urging member holding portion 8c.
The fitting portion 8 a is provided on the tip end side of the slider 8 and is slidably fitted into the fitting hole 7 b of the spacer 7. Therefore, the slider 8 can move in the left-right direction in FIG.
The plate holding portion 8 b is provided near the center of the slider 8 and holds the contact plate 9. A movable contact 10 described later is disposed on the contact plate 9. Therefore, the slider 8, the contact plate 9, and the movable contact 10 are integrated to form a movable contact unit, and these can be moved together in the left-right direction in FIG. Therefore, the slider 8, the contact plate 9, and the movable contact 10 move to the rear end side in conjunction with the movement of the operating unit 2 to the operating position, so that the movable contact 10 can contact the fixed contact 11.
The urging member holding portion 8 c is provided on the rear end side of the slider 8 and is inserted into the first urging member 12 to hold the first urging member 12.

  The contact plate 9 is a brass metal plate fixed to the plate holding portion 8 b of the slider 8. A movable contact 10 is fixed to the contact plate 9 by welding.

  The movable contact 10 is arranged on the surface on the rear end side of the contact plate 9 and is formed in a shape capable of electrically connecting the two fixed contacts 11. Therefore, when the slider 8 moves to the rear end side to reach the operating position, the movable contact 10 comes into contact with each of the two fixed contacts 11 provided in the upper and lower parts in FIG. The fixed contacts 11 are electrically connected.

  Two fixed contacts 11 are electrically connected to each of the two first conductive members 14 provided independently. Moreover, the fixed contact 11 is arrange | positioned so that the movable contact 10 can contact as mentioned above.

  The first urging member 12 is held by the urging member holding portion 8 c of the slider 8, and is formed by a compression coil spring that is attached in a compressed state between the slider 8 and the terminal base 13. Accordingly, the first urging member 12 urges the slider 8 toward the distal end side, and urges the operating portion 2 toward the protruding position. Here, since the urging force of the second urging member 5 is larger than that of the first urging member 12 as described above, the second urging force is usually between the head portion 3 and the rod portion 4. The member 5 is not further compressed.

  The terminal base 13 is inserted into the rear end side of the spacer insertion hole 1 e of the switch body 1. The terminal base 13 is fixed with the spacer 7 sandwiched between the switch body 1 by caulking the rear end portion of the spacer insertion hole 1e. Two first conductive members 14 penetrate the terminal base 13 in an electrically independent state.

  Two first conductive members 14 are provided through the terminal base 13 in an electrically independent state when the movable contact 10 is not in contact with the fixed contact 11. Two fixed contacts 11 in the contact chamber 7a are electrically connected to each first conductive member 14, respectively. The rear end side of the first conductive member 14 extends from the terminal base 13 toward the rear end side. In the present embodiment, the first conductive member 14 is made of a conductive metal such as a copper alloy. The fixed contact 11 is fixed to the first conductive member 14 by welding.

The second conductive member 15 is electrically connected to the first conductive member 14 and connects the switch circuit from the switch device 100 to the outside. Two second conductive members 15 are provided corresponding to each of the two first conductive members 14. The second conductive member 15 of the present embodiment uses an electric wire with a coating, and the portion soldered to the first conductive member 14 is stripped. Further, the second conductive member 15 passes through the cord grommet 16 and is led out of the switch device 100.
In the present embodiment, the second conductive member 15 uses an electric wire. However, the present invention is not limited to this. For example, the second conductive member 15 may be in the form of a connector or the like.

  The cord grommet 16 is disposed at the rear end portion of the switch device 100, and the second conductive member 15 passes therethrough.

  The guard cover 17 is disposed from the switch body 1 to the cord grommet 16 and covers and protects the connection portion between the first conductive member 14 and the second conductive member 15. The guard cover 17 may be constituted by a resin mold, or may be constituted by a soft resin molded product or the like.

Next, the operation of the switch device 100 of this embodiment will be described.
FIG. 4 is a cross-sectional view of the switch device 100 in a full stroke state.
In the full stroke state of FIG. 4, the tip position of the head portion 3 has moved to the same position as the tip of the switch body 1. At this time, the second urging member 5 is compressed more than the state shown in FIG. 1, and thus the rod portion 4 is inserted deeper into the head portion 3. Therefore, a force exceeding a predetermined value does not act on the movable contact 10 and the fixed contact 11 in the contact chamber 7a, and the overload absorbing mechanism acts appropriately to prevent the switch device 100 from being broken. Yes.

  In addition, the head part 3 can move to the deep position shown with the dashed-two dotted line in FIG. 4, The distance S from the front-end | tip of the head part 3 at this time to the front-end | tip of the switch main body 1 is stroke margin amount. (Overstroke) is ensured by design, and the reliability of the switch device 100 is enhanced. As a result, the switch device 100 according to the present embodiment can sufficiently secure the contact pressure between the movable contact 10 and the fixed contact 11 even when there is a variation in the attachment position with other members that press the head portion 3. . Therefore, the switch device 100 according to the present embodiment ensures that the movable contact 10 and the fixed contact 11 have sufficient contact pressure even when the head unit 3 is pressed by a cam of a vehicle transmission, for example. It is possible to turn on the switch by touching.

  Here, it is assumed that oil enters the working chamber 1 c of the switch device 100 from between the head portion 3 and the fitting hole 1 b of the switch body 1. The oil in the working chamber 1 c also enters a portion of the fitting hole 3 d that is a space between the head portion 3 and the rod portion 4. Here, if the communicating portion 4c provided in the rod portion 4 does not exist and the rod portion 4 is fitted into the fitting hole 3d with only a slight gap, the space portion of the fitting hole 3d is reduced. It acts like a space formed by the piston and cylinder. Then, when a load that presses the head portion 3 toward the rear end acts suddenly, there is no place for oil existing in the space portion of the fitting hole 3d, so that the rod portion 4 is sufficiently provided in the head portion 3. There is a possibility that the overload absorbing mechanism does not function without being able to move. Further, even if the load that is pressing the head portion 3 toward the rear end side is removed, the oil that has entered the space portion of the fitting hole 3d does not expand, so the relative relationship between the head portion 3 and the rod portion 4 can be reduced. The positional relationship may not return to the state shown in FIG. In this case, there is a possibility that the head portion 3 cannot project to a predetermined position (the position in FIG. 1) and cannot fulfill the function as a switch. In particular, when used in a cold region, the fluidity of the oil deteriorates, and only a slight gap between the fitting hole 3d and the rod portion 4 tends to cause the oil to not move sufficiently. It was.

However, in this embodiment, since the communication part 4c was provided in the rod part 4, oil, air, etc. can move freely between the space part of the fitting hole 3d, and the working chamber 1c. Therefore, the switch device 100 according to the present embodiment allows the rod portion 4 to instantaneously move into the head portion 3 even when the load that presses the head portion 3 toward the rear end is suddenly applied from the normal state of FIG. The overload absorption mechanism can operate normally.
Further, if the load that is pressing the head portion 3 toward the rear end side is removed from the full stroke state as shown in FIG. 4, the normal state as shown in FIG. It can return to a certain state.

As described above, according to the present embodiment, the switch device 100 operates the head unit 3 and the rod unit 4 even if oil enters between the head unit 3 and the rod unit 4 of the operating unit 2. Without being disturbed, the overload absorption mechanism can operate normally.
Specifically, since the communicating portion 4c is provided in the rod portion 4 of the present embodiment, oil, air, etc. can freely move between the space portion of the fitting hole 3d and the working chamber 1c. The operation of the head portion 3 and the rod portion 4 is not hindered by oil, air or the like, and the overload absorbing mechanism can operate normally. Further, the normal state shown in FIG. 1 can be instantaneously restored from the full stroke state as shown in FIG.

(Deformation)
The present invention is not limited to the embodiment described above, and various modifications and changes are possible, and these are also within the scope of the present invention.

  In the present embodiment, the communication part 4c has been described by giving an example provided in the rod part 4. For example, the communication part may be formed on the fitting surface of the fitting hole 3d of the head part 3, or the communication part may be formed on both the head part and the rod part.

  In the present embodiment, the communication portion 4c has been described by taking an example in which the communication portion 4c is formed in a concave groove shape. For example, the communication portion may be configured in another form such as a through-hole that allows the inside of the head portion 3 and the inside of the working chamber 1c to communicate with each other.

  In the present embodiment, the communication portion 4c has been described with an example in which the rod portion 4 is provided in a total of four locations. For example, the number of communicating portions may be one or five or more, and the number of communicating portions can be changed as appropriate.

  In addition, although embodiment and a deformation | transformation form can also be used in combination as appropriate, detailed description is abbreviate | omitted. Further, the present invention is not limited by the embodiments described above.

DESCRIPTION OF SYMBOLS 1 Switch main body 1a Screw part 1b Fitting hole 1c Actuation chamber 1d Step part 1e Spacer insertion hole 2 Actuator part 3 Head part 3a Fitting part 3b Intermediate part 3c Step part 3d Fitting hole 4 Rod part 4a Fitting part 4b Small diameter part 4c Communication part 4d Energizing member accommodating part 5 Second energizing member 6 Diaphragm 7 Spacer 7a Contact chamber 7b Fitting hole 8 Slider 8a Fitting part 8b Plate holding part 8c Energizing member holding part 9 Contact plate 10 Movable contact 11 Fixed Contact 12 First urging member 13 Terminal base 14 First conductive member 15 Second conductive member 16 Code grommet 17 Guard cover 100 Switch device

Claims (2)

An operating part housed in the switch body and movable between a protruding position and an operating position;
A movable contact unit having a movable contact that contacts a fixed contact disposed in the switch body in conjunction with the movement of the operating portion to the operating position;
A diaphragm that is disposed between the operating unit and the movable contact unit, and that separates the inside of the switch body into an operating chamber in which the operating unit is disposed and a contact chamber in which the movable contact unit is disposed;
A first urging member that urges the operating portion toward the protruding position by urging the movable contact unit;
With
The operating part is
A head that can project from the switch body;
One end portion is accommodated in the head portion so as to be movable with respect to the head portion, and the other end portion is disposed so as to contact the diaphragm; and
A second urging member disposed between the head portion and the abutting portion and having a larger urging force than the first urging member;
Have
A communication part that communicates the inside of the head part and the inside of the working chamber is provided in at least one of the head part and the contact part ,
The communication part is formed by a concave groove formed on a sliding surface sliding with the head part of the contact part;
A switch device characterized by. The switch device according to claim 1 ,
A plurality of the communication portions are provided;
A switch device characterized by.

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