JP5611894B2 - Rocker switch - Google Patents

Description

  The present invention relates to a seesaw-operated rocker switch that performs a seesaw operation when an operation unit is operated, and more particularly to a rocker switch that includes a lock mechanism for preventing malfunction.

An example of a rocker switch having a lock mechanism for preventing malfunction is disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 11-67014).
The rocker switch (seesaw operation type switch) described in Patent Document 1 is formed in a bottomed box shape having a housing having a side wall, a bottom portion and a box shape inside, and is formed by a box-shaped outer surface of the bottom portion. An operation portion that operates when a surface is operated and a contact portion that is driven by a seesaw operation of the operation portion to move toward and away from a fixed contact, and is engaged with a side wall of the housing by the seesaw operation. The slide part which locks the said operation part has the structure provided in the box-shaped inside of the said operation part. That is, a slide portion is provided in the operation portion, and the operation piece is configured to lock the operation portion by engaging the engagement piece of the slide portion with the engagement hole of the housing side wall. .

Japanese Patent Laid-Open No. 11-67014

  When the rocker switch described in Patent Document 1 is applied as an ON / OFF switch of an electric circuit in a machine that is operated in a place with a lot of dust and a severe working environment such as a construction machine, there are the following problems. That is, an opening is formed on the upper surface of the operation portion of the rocker switch, and the slide piece of the slide portion is accommodated in this portion, and the slide portion is also provided on the side surface of the operation portion. Since an opening through which the locking piece enters and exits is formed, dust easily collects in a gap between the operating portion and the slide portion. For this reason, the smooth operation | movement of the said slide part was prevented, the lock function did not work, and there existed a subject that it was easy to cause a misoperation.

  An object of the present invention is to obtain a rocker switch that can prevent the operation of a lock mechanism for preventing malfunction even when used in a dusty working environment.

In order to achieve the above object, the present invention provides a lock case, an operation portion (lock knob base) that is rotatably supported by the lock case by a pin and that performs a seesaw operation when the operation surface is pressed, and a seesaw for the operation portion. A rocker switch including a contact portion configured to be energized (ON) or interrupted (OFF) by an operation, provided on an upper surface of the operation unit so as to slide on a surface of the operation unit that performs a seesaw operation; A locking knob having a locking portion engageable with an upper end portion of an outer frame end portion of the lock case, and the locking portion is provided on a lower surface of the locking knob, and when the locking knob slides, the locking portion provided is configured to upper and engagement of the outer frame end of the lock case, when pressing the one end side of the operation portion the operation portion and the pin Parts and rotates around the turn ON or OFF state the contact portion, of the operation unit is pressed the lock knob in this state one end side and the lock case the locking part is slid on the opposite side of The seesaw operation of the operation unit is locked by engaging with the upper end of the outer frame end, and the lock of the operation unit is unlocked by sliding the lock knob toward one end of the operation unit that is pressed. It is comprised so that it may do.

Here, it is preferable to provide a misoperation prevention guard that is formed in a convex shape at the end of the operation portion on the side where the lock knob is slid to be in the lock position and prevents the lock knob from being erroneously operated.
The erroneous operation prevention guard may be configured to be substantially equal to or higher than the height of the end of the lock knob on the lock position side.

  The lock knob is configured to be always pressed to the lock position side by a spring, and when the one end side of the operation portion is pressed and the operation portion is rotated around the pin portion, the lock knob is automatically moved by the spring. Alternatively, the lock knob can be slid to the lock position side so that the locking portion of the lock knob automatically locks with the outer frame end of the lock case.

  According to the present invention, even when used in a dusty work environment, it is possible to prevent the operation of the lock mechanism for preventing malfunction, thereby preventing a rocker switch that can prevent malfunction. is there.

The perspective view which shows the cab of the construction machine provided with Example 1 of the rocker switch of this invention. The expansion perspective view which expands and shows the rocker switch vicinity shown in FIG. The perspective view which expands and shows the rocker switch shown in FIG. The rear view of the rocker switch of FIG. FIG. 5 is a cross-sectional view showing the internal structure of the rocker switch shown in FIGS. FIG. 5 is a cross-sectional view showing the internal structure of the rocker switch shown in FIGS. 3 and 4, in a state where an operation unit is locked.

  Hereinafter, embodiments of the rocker switch of the present invention will be described with reference to the drawings. In each figure, the part which attached | subjected the same code | symbol has shown the part which is the same or it corresponds.

A rocker switch according to a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a cab of a construction machine equipped with a rocker switch according to the present embodiment. In the figure, 1 is a driver's seat, and an operation lever 2 and various kinds of parts are located on the side of the driver's seat 1. Operation switches are provided. Reference numeral 3 denotes a rocker switch of the present embodiment provided at a side portion of the driver's seat 1, and an enlarged view of the vicinity of the rocker switch 3 is shown in FIG.

  In this embodiment, the rocker switch 3 is used as a filter regeneration switch of a diesel engine exhaust aftertreatment device (DPF; Diesel Particulate Filter). The regeneration process in the diesel engine exhaust aftertreatment device burns and removes particulate matter such as soot deposited on the filter at a high exhaust temperature. Therefore, since the exhaust temperature discharged from the exhaust pipe to the outside is also higher than usual, if there are combustibles around the exhaust pipe, or regeneration is performed in a narrow work site such as in a tunnel, It tends to be affected by heat from the exhaust. Therefore, it is necessary to prevent the regeneration process from being performed in a place where it is inappropriate to perform the regeneration process, and it is necessary to prevent the filter regeneration switch from being easily turned on.

  In addition, rocker switches that are applied as ON / OFF switches for electrical circuits in machines that are operated in harsh working environments, such as construction machines, prevent dust from entering and causing malfunctions. It is also necessary.

The detailed structure of the rocker switch 3 shown in FIGS. 1 and 2 will be described with reference to FIGS. 3 is an enlarged perspective view showing the rocker switch shown in FIG. 2, and FIG. 4 is a rear view of the rocker switch shown in FIG.
3 and 4, reference numeral 4 denotes a lock case. A lock knob base 6 serving as an operation portion of the rocker switch 3 is rotatably supported by the lock case 4 via a pin 5. The lock knob base 6 is configured to perform a seesaw operation when the operation surface 6A or 6B is pressed.

  Further, a contact portion is provided in the lock case 4, and the contact portion is energized (ON) or cut off (OFF) when the operation portion 6 performs a seesaw operation. ON-OFF of the contact portion is connected to the diesel engine exhaust aftertreatment device (not shown) via a conductor 7.

  8 is provided so as to slide to the left and right (from one side of the operation surfaces 6A and 6B to the other side) of the operation unit 6 performing the seesaw operation, and engages with the outer frame end 4a of the lock case 4 It is a lock knob provided with the possible latching | locking part 8a (refer FIG. 5, FIG. 6). The outer frame of the lock case 4 is manufactured by resin molding, and a rubber material 9 is provided on the outer surface of the resin outer frame. Reference numeral 10 denotes a switch fixing claw for fixing the rocker switch 3 to the hole by pushing the rocker switch 3 into a hole of a switch installation portion provided on the side of the driver's seat.

  Reference numeral 11 denotes an erroneous operation prevention guard formed in a convex shape at an end of the operation portion (lock knob base) 6 on the side where the lock knob 8 is slid to be in the locked position. The erroneous operation prevention guard 11 is in the locked position. The certain lock knob 8 is provided so as to cover the end of the lock knob 8 so as not to be pushed by mistake, thereby preventing the lock knob 8 from being erroneously operated.

Next, the internal structure of the rocker switch 3 of this embodiment shown in FIGS. 3 and 4 will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the operation unit unlocked, and FIG. 6 is a cross-sectional view of the operation unit locked.
Referring to FIG. 5 in which the operation unit 6 is unlocked, the operation unit (lock knob base) 6 is configured to be able to rotate left and right (seesaw operation) about the pin 5 supported by the lock case 4, A swinging portion 12 that swings integrally with the operating portion 6 extends downward from the operating portion 6 around the pin 5.

The lock case 4 is provided with a contact portion composed of a movable piece 14, fixed terminals 15 and 16, a common terminal 17, and the like. In this contact portion, an upper end portion 17 a of the common terminal 17 is provided. The movable piece 14 is configured to be pivotable left and right as a fulcrum.
The rocking portion 12 is provided with a pressing member 12a therein, and the pressing member 12a is configured to always press the movable piece 14 with a spring. Accordingly, when the pressing member 12a of the swinging portion 12 moves on the movable piece 14, the movable piece 14 is brought into contact with and separated from the contacts 15a and 16a of the fixed terminals 15 and 16 to be turned on and off. It is configured as follows.

  The lock knob 8 is attached so as to slide left and right on the upper surface of the operation portion 6, and a locking portion 8 a for locking the seesaw operation of the operation portion 6 is integrally formed on the lower surface of the lock knob 8. It is configured. That is, when one end side (operation surface 6A side) of the operation unit 6 is pressed from the state shown in FIG. 5, the operation unit 6 rotates about the pin 5 unit to turn the contact unit on or off. (In this embodiment, the contact portion is configured to be in an OFF state when the operation surface 6A is pressed). In this state, the lock knob 8 is opposite to the pressing side (operation surface 6A side) (operation surface). 6B), the locking portion 8a can be engaged with the outer frame end portion 4a of the lock case 4, as shown in FIG. Can be locked.

  In order to slide the lock knob 8, it may be slid manually, but in this embodiment, the lock knob 8 is automatically moved to the operation surface 6B side by pushing the operation surface 6A, and the locking The portion 8 a is configured to be engaged with the outer frame end 4 a of the lock case 4. That is, in this embodiment, the lock knob 8 is configured to be constantly pressed to the lock position side (operation surface 6B side) by the spring 13, and in this way, the operation is as follows.

In the state shown in FIG. 5, the locking portion 8a of the lock knob 8 is pressed against the inner surface of the lock case 4 by the action of the spring 13, and the lock is released.
Next, when the operation surface 6A of the operation portion 6 is pressed to rotate the operation portion 6 around the pin 5 portion, the locking portion 8a of the lock knob 8 becomes the outer frame end portion 4a of the lock case 4. When the upper end surface is exceeded, the spring 13 automatically slides to the lock position side, and the locking portion 8a of the lock knob 8 is moved to the outer frame end 4a of the lock case 4 as shown in FIG. It can be locked automatically.

  Further, when releasing the locked state of the operation unit 6 from the state shown in FIG. 6, the lock knob 8 is moved to the operation surface 6 </ b> A of the operation unit 6 by placing a finger on the protrusion 8 b on the upper surface of the lock knob 8. Slide manually to the side. Thereby, since the latching | locking part 8a of the lock knob 8 can be moved to the inner side rather than the outer-frame edge part 4a of the lock case 4, it can be in the state by which the lock | rock of FIG. 5 was cancelled | released. By releasing the lock of the operation unit 6 in this way, the contact unit can be turned on by pressing the operation surface 6B of the operation unit 6.

  If the lock is easily released and it is operated to the ON state, as described above, when the rocker switch 3 is used as a filter regeneration switch of the diesel engine exhaust aftertreatment device, Exhaust temperature released to the outside is higher than normal, so if there are combustible materials around the exhaust pipe or regeneration at a narrow work site such as in a tunnel, Easy to influence. Accordingly, it is necessary to prevent the reproduction process from being performed in a place where the reproduction process is inappropriate. However, in order to slide the lock knob 8, it is possible to easily move the lock knob by hooking a finger on the outer end 8c of the lock knob 8 in addition to hooking the finger on the protrusion 8b. There is a possibility of releasing the lock.

  Therefore, in this embodiment, the above-described erroneous operation prevention guard 11 is formed in a convex shape at the end of the operation section (lock knob base) 6 on the side where the lock knob 8 is in the lock position. The erroneous operation prevention guard 11 is configured to be substantially equal to the height of the portion (outer end portion 8c) on the lock position side of the lock knob 8 or higher than the height of the outer end portion 8c of the lock knob. Is preferred.

  In this manner, by providing the malfunction prevention guard 11, in the locked state shown in FIG. 6, it is possible to avoid accidentally putting a finger on the outer end 8c of the lock knob 8 and sliding the lock knob 8. Therefore, unless the operator intentionally releases the lock knob 8 such as by placing a finger on the protrusion 8b, the lock is difficult to be released. For example, the filter regeneration switch of the diesel engine exhaust aftertreatment device is erroneously turned ON. Can be avoided.

  According to the present embodiment, since the lock knob 8 is configured to slide left and right on the upper surface of the operation portion (lock knob base) 6, there is almost no gap between the operation portion 6 and the lock knob 8, and the operation portion 6 and the lock knob. It is difficult for dust to accumulate between the two and inside the rocker switch 3. Therefore, even when used in a dusty working environment such as a construction machine, it is possible to obtain a rocker switch that can prevent the operation of the lock knob 8 constituting the lock mechanism from being hindered.

Moreover, according to the present embodiment, since the locking mechanism 11 has the guard 11 to prevent the locking mechanism from being released unexpectedly, it is possible to obtain a rocker switch that can prevent the lock from being easily released due to a mistake. Can do.
Furthermore, according to the present embodiment, since the lock mechanism 4 is partly configured using the outer frame end 4a of the lock case 4, an effect that the lock mechanism can be manufactured at a low cost is also obtained.
In the above-described embodiments, the rocker switch of the present invention has been described as an example provided in the cab of a construction machine and used as a filter regeneration switch of a diesel engine exhaust aftertreatment device. It goes without saying that is not limited to this.

1: Driver's seat,
2: Operation lever,
3: Rocker switch
4: Lock case, 4a: Outer frame edge,
5: Pin,
6: operation part (lock knob base), 6A, 6B: operation surface,
7: Lead wire
8: Lock knob, 8a: Locking part, 8b: Projection part, 8c: Outer end part,
9: Rubber material
10: Switch fixing claw,
11: Misoperation prevention guard,
12: oscillating part, 12a: pressing member,
13: Spring,
14: movable piece,
15, 16: fixed terminal, 15a, 16a: contact,
17: Common terminal, 17a: Upper end.

Claims (3)

A lock case, an operation part that is rotatably supported by the lock case by a pin, and operates as a seesaw when the operation surface is pressed, and is energized (ON) or shut off (OFF) by the seesaw operation of the operation part. In a rocker switch having a configured contact portion,
A lock knob provided on the upper surface of the operation portion so as to slide on the surface of the operation portion that performs seesaw operation and having a locking portion that can be engaged with an upper end portion of an outer frame end portion of the lock case;
The locking portion is provided on the lower surface of the lock knob, and when the lock knob slides, the locking portion provided on the lower surface of the lock knob is engaged with the upper end portion of the outer frame end portion of the lock case. To configure
When the one end side of the operation part is pressed, the operation part turns around the pin part to turn the contact part ON or OFF,
In this state, the lock knob is slid to the side opposite to the one end side of the operation portion, and the engagement portion is engaged with the upper end portion of the outer frame end portion of the lock case. Lock the seesaw operation,
Further, the lock knob is configured to release the lock of the operation unit by sliding the lock knob to one end side of the pressed operation unit . The rocker switch according to claim 1, further comprising an erroneous operation prevention guard configured to be convex at an end portion of the operation portion on a side where the lock knob is slid to be in a locked position to prevent the lock knob from being erroneously operated. The rocker switch is characterized in that the misoperation prevention guard is configured to be substantially equal to or higher than the height of the end portion of the lock knob on the lock position side. . 3. The rocker switch according to claim 1 , wherein the lock knob is configured to be constantly pressed to a lock position side by a spring, and presses one end side of the operation portion to center the operation portion around the pin portion. When it is rotated, the lock knob is automatically slid to the lock position side by the spring, and the locking portion of the lock knob is automatically locked with the outer frame end of the lock case. Rocker switch characterized by.

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