JPH0756599Y2 - Actuator switch mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a mounting structure of a switch for controlling a drive mechanism.

(Prior Art) In a conventional drive device, a switch for controlling the drive of a DC motor, which is a drive source, is generally mounted in a main body case that houses a gear reducer.

(Problems to be solved by the invention) Therefore, in the conventional structure, when assembling the switch, it is troublesome to pull the switch cord outside the main body case, and the mounting work is complicated, and the switch fails and is replaced. When it is necessary, the main body case must be disassembled, and there is a problem that maintenance is very troublesome.

(Means for Solving the Problem) The present invention is intended to solve the above-mentioned problems in the prior art, and as a means thereof, a drive mechanism for driving a driven member is housed. In the mounting structure of the actuator switch to the main body case, the actuator switch is attached to the inner surface side of the switch cover that closes the opening of the switch accommodating recess opened in the main body case, and The state of the drive mechanism is detected by an operator of an actuator switch that projects into the drive mechanism through an opening detection hole.

(Embodiment) An embodiment in which the present invention is applied to a striker drive device for a vehicle door lock will be described with reference to the drawings.

FIG. 1 is a perspective view showing how the position switch is attached to the main body case, FIG. 2 is a vertical sectional view of the striker drive device, and FIG. 3 is an exploded perspective view thereof.

As shown in FIG. 2 and FIG. 3, the drive device A for moving the striker 15 along the opening and closing direction of the door includes a main body case 1 accommodating a reduction gear group and a base plate on which the striker 15 is projected. A guide plate 12 for slidably holding 13 and a DC motor 7 housed in a housing recess 21 formed in the body case 1 for driving the reduction gear group. . The final stage gear 4 in the reduction gear group is integrally fixed to a cam shaft 3 having an eccentric pin 2 projecting from its shaft end.

A lid 9 is screwed to the open end of the main body case 1, and an insertion hole 10 is formed in the lid 9 to allow the eccentric pin 2 to pass therethrough and to serve as a bearing portion thereof. A guide plate 12 is screwed to the upper surface of the lid 9. The guide plate 12 includes the lid 9
A guide chamber 12a is provided on the surface opposite to and a base plate 13 is slidably held in the guide chamber 12a. The U-shaped striker 15 projecting from the base plate 13 is in a state of protruding from the rectangular rectangular hole 12b formed in the guide plate 12. The base plate 13 is formed with an elongated hole 13a, and the eccentric pin 2 is engaged with the elongated hole 13a. Thus, when the cam shaft 3 is rotated by the rotation of the DC motor 7 via the reduction gear group, the eccentric pin 2 causes the base plate 13 to slide, so that the striker 15
Can be moved.

As shown in FIGS. 1 to 3, a switch accommodating recess 28 having a detection hole 28a at the bottom is formed in the main body case 1 on the surface facing the lid 9, and the switch housing recess 28 is formed. Position switch from the outside of the main body case 1 to the accommodation recess 28
29 is attached, and the operator 29a of the position switch 29 can be made to face the inside of the main body case 1 and can be interlocked with the final stage gear 4. Further, the position switch 29 is held on the inner surface side of the switch cover 30, and by screwing the switch cover 30 to the main body case 1, the switch cover 30 can close the switch housing recess 28. Is being done. Here, the cord 29b connected to the position switch 29
(Fig. 2) shows the main body case 1 with the grommet 31 interposed from the cord drawing hole 30a formed in the switch cover 30.
The O-ring 35 for waterproofing is provided between the main body case 1 and the switch cover 30. Since the position switch 29 is assembled from the outside of the main body case 1 in this way, the work of pulling the cord 29b connected to the position switch 29 to the outside of the main body case 1 is not necessary. 29 assembly work becomes very easy. Further, even if the position switch 29 should fail, only the position switch 29 can be replaced without disassembling the main body case 1, so that the maintenance becomes very easy.
The cord 29b pulled out of the body case 1
Is connected to the DC motor 7 via a control circuit, whereby the position state of the striker 15 is detected via the final stage gear 4 and this detection signal is sent to the DC motor 7 via the control circuit. Therefore, the striker 15 can be driven.

(Effect of the Invention) The present invention has the switch for controlling the drive mechanism assembled from the outside of the main body case as described above, so that the conventional switch cord can be routed outside the main body case. Since it eliminates the need for a switch, the switch mounting work will be extremely easy, and even if the switch should fail, it is possible to replace only the switch without disassembling the case, which makes maintenance very easy. Has excellent effect. Further, since the switch is mounted on the inner surface side of the switch cover that closes the opening of the switch accommodating recess, it is not necessary to provide a complicated cover structure. Further, when the switch cover is attached to the main body case, the operator protruding from the switch into the main body case and the drive mechanism are interlocked with each other, so that there is no need to provide a complicated interlocking mechanism and the configuration is simple.

[Brief description of drawings]

FIG. 1 is a perspective view showing how the position switch is attached to the main body case, FIG. 2 is a vertical sectional view of the striker drive device, and FIG. 3 is an exploded perspective view thereof. A: drive device, 1 main unit case 15 striker, 28 switch recess 28a detection hole, 29 position switch 29a operator, 30 switch cover

Claims (1)

[Scope of utility model registration request] 1. A structure for mounting an actuator switch on a main body case containing a drive mechanism for driving a driven member, wherein the switch cover closes an opening of a switch accommodating recess formed in the main body case. An actuator switch is attached to the inner surface side of the drive mechanism, and the state of the drive mechanism is detected by an operator of the actuator switch protruding to the drive mechanism through a detection hole opened at the bottom of the switch accommodating recess. Actuator switch mounting structure.