JPH0314749Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention can be used as a door switch that detects the opening and closing of a door, a limit switch that detects when a material has reached a predetermined position in an automatic material transport line in a factory, etc. Regarding the push switch used.

(Prior Art) Conventionally, this type of push-type switch is operated when an operating shaft provided in a case so as to be freely movable back and forth comes into contact with another object and is pushed into the case.

(Problem to be solved by the invention) For example, in an automatic sliding door opening/closing device that automatically opens and closes the sliding door of a car, a push-pull type device installed on the side of the car body indicates when the sliding door is closed. The switch detects this and stops the power supply to the sliding door opening/closing drive device.

However, in this type of sliding door, the door lock changes from the fully engaged state to the fully engaged state.
The sliding door is now able to overrun slightly, and when it overruns, the sealing reaction force due to the weather strip installed between the vehicle body and the sliding door gradually increases. Therefore, if the power supply to the sliding door opening/closing drive device is stopped too early, the door lock will be in a half-latched state, and if it is too late, the seal reaction force will be applied to the sliding door opening/closing drive device. acts,
There is a risk that the load on the motor etc. will increase rapidly.

Therefore, it is necessary to accurately adjust the operating timing of the push switch for stopping the power supply to the sliding door opening/closing drive device.

Conventionally, this has been dealt with by accurately determining the attachment device of the push-type switch to the vehicle body, but since the timing at which the door lock becomes fully latched varies slightly from vehicle to vehicle, It is not enough to simply mount the push switch at the desired position, but the mounting position must be adjusted for each vehicle, and the adjustment work is complicated.

The problem of adjusting the operating timing is not limited to door switches, but is a common problem in various push-type switches used to detect the moving position of other objects.

The purpose of the present invention is to solve these problems and provide a push-type switch that can accurately determine the amount of protrusion of a contact member that comes into contact with another object when adjusting the amount of protrusion. That is.

(Means for Solving the Problems) In the present invention, in a push-type switch in which an operating shaft is provided in a case so as to be able to move forward and backward, and the contacts are opened and closed by being pushed into the case, the tip of the operating shaft is A contact member that pushes the operating shaft into the case by contacting with another object is provided via a mounting position adjustment device in the forward and backward direction of the operating shaft.

(Function) In the present invention, by adjusting the mounting position of the contact member with respect to the operating shaft, it is possible to adjust the timing at which the switch is activated by contacting another object.

In addition, by providing a slit that faces in the axial direction of the actuating shaft on either the tip of the actuating shaft or the abutting member, and a protrusion that can engage with the slit on the other side, the abutting member can be prevented from rotating. In addition to being reliable, by counting the number of times the protrusion passes through the slit, the amount of movement of the abutment member can be accurately determined.

(Example) Hereinafter, an example in which the present invention is applied to a door switch for a sliding door of an automobile will be described based on the accompanying drawings.

Reference numeral 1 denotes a case, which includes a cylindrical portion 2 facing in the front-rear direction, an outward facing flange 3 attached to the rear end of the cylindrical portion 2, and a cylindrical portion 2.
The pillar 5 is made up of a pair of upper and lower leg pieces 4, 4 that protrude forward from the front end of the pillar 5. is fixed to.

A conductive contact plate 7 facing in the vertical direction is attached to the upper and lower legs 4, 4 by penetrating the upper and lower ends of the legs 4, 4 and bending them. In the center of 7 is a small shaft hole 8.
However, horizontally elongated holes 9 are bored in the upper and lower parts of each of the holes.

Reference numeral 10 denotes an operating shaft made of a hard synthetic resin material having appropriate elasticity, which includes a shaft portion 10a facing the front-rear direction and having a generally small cross-section, and a large-diameter portion 10b connected to the rear end thereof. The locking portion 10d is connected to the front end of the shaft portion 10a and has a vertically bifurcated locking portion 10d that includes a protrusion 10c that projects in the vertical direction.

Almost all of the operating shaft 10 except for the tip of the large diameter portion 10b is slidable in the cylindrical portion 2 of the case 1, and the shaft portion 10a is slidable in the shaft hole 8 of the contact plate 7 in the front and rear directions. , and is fitted so as to be prevented from rotating around the axis, so that the front end surface of the large diameter portion 10b and the contact plate 7
is always biased rearward by a compression coil spring 11 compressed around the shaft portion 10a, so that the rear end portion of the large diameter portion 10b is pushed backward from the rear surface of the flange portion 3 of the case 1 It is now possible to move forward and backward toward the future.

A conductive contact piece 12 that serves as a stopper to prevent rearward movement of the actuating shaft 10 is locked to a locking portion 10d of the actuating shaft 10 that protrudes forward from the contact plate 7. At the top and bottom of this contact piece 12,
The bent pieces 12a facing rearward are arranged in series, and the rear end of each bent piece 12a has a shape as shown in FIG.
It has a pointed shape. The width of each bent piece 12a is
The length is larger than the length of the horizontally elongated hole 9 bored in the contact plate 7, and only the tip of the pointed end of each bent piece 12a fits into the horizontally elongated hole 9 to serve as an electrical contact point.
Both edges of the tip of the bent piece 12a are in contact with both ends of the bent piece 12a.

A connecting terminal 7a connected rearward from one side edge of the contact plate 7 and a connecting terminal 12b connected forward connected from the same side edge of the contact piece 12 each have a sliding door opening/closing control device (not shown). The terminals of coated conductive wires 13 and 14 that are connected to (omitted) are connected.

Thus, the bent piece 12a of the contact piece 12 is always
The operating shaft 10 is urged rearward by the compression coil spring 11 until the tip of the large diameter portion 10b of the operating shaft 10 fits into the horizontally elongated hole 9 of the contact plate 7 and comes into contact with the contact plate 7. The rear end protrudes rearward from the rear surface of the pillar 5, and when the operating shaft 10 is pushed forward against the biasing force of the compression coil spring 11, the contact piece 12 is separated from the contact plate 7. ,
The electrical connection between both conducting wires 13 and 14 is cut off.

A screw hole 15 is formed from the rear surface of the large diameter portion 10b of the operating shaft 10, and this screw hole 1
Two slits 16 facing in the axial direction of the actuating shaft 10 are cut throughout the five sections at an angle of 180 degrees from the center.

A male threaded portion 17a formed in the front half of the short shaft-shaped abutment member 17 is screwed into this threaded hole 15.

Two axially long protrusions 17c are formed on the outer periphery of the shaft portion 17b in the rear half of the abutment member 17 at a distance of 180 degrees from the center. The cross-sectional shape of the protrusion 17c is arcuate, its height is approximately equal to the height of the thread of the male threaded portion 17a, and its width is approximately equal to the width of the slit 16.

A slot 17d is cut into the rear end surface of the abutment member 17, into which the tip of a tool (not shown) such as a screwdriver can be engaged.

By inserting the tip of a tool such as a screwdriver into this slot 17d and rotating the entire abutting member 17, the abutting member 17 from the rear end of the actuating shaft 10 is rotated.
The amount of protrusion can be adjusted.

However, when the abutment member 17 is rotated, the protrusion 17c is pushed between the inner surface of the screw hole 15 and the shaft portion 17b, and the rear end portion of the large diameter portion 10b of the actuating shaft 10 is pushed outward in the radial direction. The male threaded portion 17a is elastically bent in the direction, and the elastic restoring force at that time provides an appropriate resistance force to the rotation of the male threaded portion 17a within the threaded hole 15.

When the protrusion 17c is engaged with the slit 16, no radially outward force is applied to the actuating shaft 10, and conversely, the abutment member 17 prevents the actuating shaft 10 from radially outward. It is restrained and prevented from rotating with a force equal to the elastic restoring force when it is expanded.

Therefore, after adjusting the amount of protrusion of the abutting member 17, it is preferable to make sure that the protrusion 17c is engaged with the slit 16.

In this embodiment, the slit 16 and the protrusion 17c form a rotation stopper for the male threaded portion 17a, and this stopper and the screw hole 15,
The male threaded portion 17a forms a means for adjusting the mounting position of the abutment member 17.

18 is a sliding door.

Next, the operation and handling of this embodiment will be explained.

When the sliding door 18 is open, the rear end of the large diameter portion 10b of the operating shaft 10 protrudes rearward from the pillar 5 due to the urging force of the compression coil spring 11, and the contact plate 7 and the contact piece 12 are connected to each other. are in contact with each other.

When the sliding door 18 is closed to a predetermined position from this state, the rear end of the contact member 17 comes into contact with the front end of the sliding door 18, and the operating shaft 10 moves forward against the biasing force of the compression coil spring 11. , the contact plate 7 and the contact piece 12 are separated, and the contact is opened.

To adjust the amount of protrusion of the abutting member 17, insert an appropriate rotary tool into the slot 17d and adjust the amount of protrusion of the abutting member 1.
Just rotate 7.

At this time, due to the threaded engagement between the screw hole 15 and the male threaded portion 17a, the contact member 17 moves forward and backward from the tip of the actuation shaft 10, and the protrusion 17c elastically bends the tip of the actuation shaft 10 outward in the radial direction. Rotate while bending.

If the abutment member 17 is stopped at the position where the protrusion 17c engages with the slit 16 after the adjustment is completed, the abutment member 17 will not rotate inadvertently.

Since this embodiment has the above-described configuration, the amount of protrusion of the contact member 17 with respect to the operating shaft 10 can be easily adjusted, and by this adjustment, the timing of the switch operation can be adjusted. Therefore, there is no need to adjust the mounting position of the push-type switch itself relative to the vehicle body 5, unlike in the conventional case, and handling is convenient.

Further, in this embodiment, after adjusting the amount of protrusion of the abutting member 17, the abutting member 17 does not accidentally shift its position, and can sufficiently withstand vibrations of the vehicle body.

(Modification) In the above embodiment, the screw hole 15 is provided on the actuating shaft 10 side, and the male thread portion 1 is provided on the abutment member 17 side.
7a is provided, but conversely, a male threaded portion may be provided on the operating shaft side, and a screw hole may be provided on the abutment member side.

Further, in the above embodiment, the slit 16 is provided on the operating shaft 10 side where the screw hole 15 is located, and the protrusion 1
7c is provided on the side of the abutment member 17 where the male threaded portion 17a is located, but a slit is provided, for example, in the center of the abutment member in the shape of a slot, and a protrusion is provided on the inner surface of the screw hole of the actuating shaft. You can.

In this case, the contact member is made using a slit,
It can be elastically bent inward in the radial direction,
Alternatively, it is preferable that the entire contact member or only the tip end of the actuating shaft be formed of a soft elastic material or the like.

Further, in the embodiment, the protrusion 17c is provided apart from the male threaded portion 17a in the axial direction, but the protrusion 17c may be provided directly on the outer periphery of the male threaded portion.

(Effects of the invention) According to the invention, by adjusting the mounting position of the contact member with respect to the operating shaft, the timing at which the switch is activated when it comes into contact with another object can be adjusted. There is no need to adjust the mounting position of the type switch itself, and the adjustment work can be performed easily, which has great practical benefits.

Furthermore, in the present invention, a slit facing the axial direction of the actuating shaft is provided on one of the tip end of the actuating shaft and the abutting member, and a protrusion that can engage with the slit is provided on the other. The rotation of the contact member is ensured, and by counting the number of times the protrusion passes through the slit, the amount of movement of the contact member can be accurately determined.

In other words, the abutting member is most stable when the protrusion engages with the slit, and when the protrusion is rotated from this state to disengage from the slit, the rotational resistance is maximum. If the abutting member is stopped at a position where the protrusion engages with the slit after the adjustment of the amount of protrusion of the member is completed, the abutting member will not rotate inadvertently.

In addition, when rotating the abutting member to adjust its protrusion amount, the rotational resistance of the abutting member fluctuates dramatically when the protrusion passes through the slit, so you cannot sense that the protrusion has passed through the slit. By counting the number of times the contact member has passed, it is possible to accurately determine how far the contact member has moved forward or backward from its initial position.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional side view of a main part of an embodiment of the present invention, FIG. 2 is a cross-sectional plan view taken along the line X--X in FIG. 1, and FIG. FIG. 4, a longitudinal sectional view taken along the Y line, is an exploded perspective view of the main parts. 1...Case, 5...Pillar, 7...Contact plate,
10... Operating shaft, 11... Compression coil spring, 12
... Contact piece, 13, 14 ... Conductor, 15 ... Screw hole, 16 ... Slit, 17 ... Contact member, 17
a...Male thread part, 17c...Protrusion, 18...Sliding door.

Claims (1)

[Scope of utility model registration request] In a push-type switch, in which an actuating shaft is provided in a case so that it can move forward and backward, and the contacts are opened and closed by being pushed into the case, the actuating shaft can be moved by bringing at least the tip of the actuating shaft into contact with another object. At least one of the contact member to be pushed into the case is made of an elastically bendable material, and a screw hole is provided in either one of the tip of the actuating shaft and the contact member, and the other is provided with a screw hole. A male threaded portion that is threaded into the screw hole is provided, a slit is provided on one of the tip end of the actuating shaft and the abutment member and faces in the axial direction of the actuating shaft, and a protrusion that can be engaged with the slit is provided on the other side. A push switch characterized by being equipped with.