JPH0619095Y2 - Contact sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a contact sensor, and an object thereof is to provide a contact sensor which has less fluctuation and whose contact pressure can be easily adjusted.

<Prior Art> There are various types of sensors, and among them, a contact sensor that directly contacts an object and detects a predetermined characteristic of the object is known.

In recent years, in order to detect a short circuit or the like in a liquid crystal display circuit, an attempt has been made to detect the state of the circuit by sliding such a contact sensor while keeping contact with the liquid crystal substrate.

However, when the sensor is used in such a sliding contact, it is very difficult to adjust the contact pressure of the sensor. That is, if the contact pressure is too high, the object is scratched and the contactor wears more. In addition, when the contact pressure is small, there is a non-contact, and the reliability of detection deteriorates.

Further, since a circuit or the like has irregularities and is not a uniform plane, there is a problem that the contact bounces at the circuit part when the contact is slid, and it has been desired to solve this defect.

<Outline of the Invention> The present invention has been made in order to solve the above-mentioned problems of the conventional contact sensor, and includes a holder composed of at least two leaf springs having both ends and a base fixed, and a holder of the holder. The two leaf springs are bent by supporting the contactor attached to the tip and the holding body from below at arbitrary positions in the vertical direction,
A basic feature is that a support body that adjusts the contact pressure of the contact due to the repulsive force of the leaf spring and a means that detects non-contact between the holding body and the support body are provided.

In the above structure, the repulsive force of the leaf spring varies depending on the vertical support position of the holding body by the support body, and the repulsive force becomes stronger as the leaf spring is located higher. Thereby, the contact pressure of the contactor can be adjusted. Moreover, since two or more leaf springs are used, the weight is light and bounce can be suppressed. Further, there is little change in the position and angle of the contact due to the supporting position. Further, it is possible to detect the contact of the contact with the object by the detecting means.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 2 and 3 are leaf springs, which are parallel to each other. In this embodiment, the leaf springs 2 and 3 are made of steel and have a thickness of about 0.1 mm. Both ends of the leaf springs 2 and 3 are fixed by a contact plate 20 and bolts 21. That is, the tip end portion has a structure in which the holder 10 is sandwiched between the leaf springs 2 and 3, and the contact plates 20 and 20 are attached to the outside by fastening bolts 21 and 21. On the other hand, at the base part, the extension arm 23 is sandwiched between,
The structure is such that 0 and 20 are fastened with contact bolts 21 and 21. The structure for fixing the leaf springs 2 and 3 is not limited to this, and various structures such as fixing by welding or the like can be adopted.

The holder 10 is provided with an oblique hole for inserting the contactor 1 at a predetermined angle, and the contactor 1 is inserted therein. The contactor 1 is configured to be fastened with a bolt 11 so that the downward protruding length thereof can be changed.

An electrode 22 is provided between the contact plate 20 and the bolt 21 at the base of the leaf springs 2 and 3, and the detection signal of the contact 1 is guided to the outside from this electrode 22.

The extending arm 23 has a side crank shape, and its tip is fixed between the leaf springs 2 and 3 as described above, and its base is fixed to the horizontally movable base 5 by bolts 24 and 24.

The support arm 4 is attached to the tip of the horizontally movable base 5 with a bolt 41.
0 extends horizontally and is mounted. This support arm 4
The vertical movable plate 42 hangs downward from 0. An elongated hole 44 is formed in the vertical movable plate 42, and is fixed to the support arm 40 by a set screw 43 so that the vertical position of the movable plate 42 can be adjusted. A horizontal arm 45 extending in the horizontal direction is further fixed to the lower end of the vertically movable plate 42 by bolts 47, 47. A contact protrusion 46 is provided on the tip of the horizontal arm 45, and the contact protrusion 46 is located below the tip of the leaf springs 2 and 3 to support the leaf springs 2 and 3 from below. Leaf springs 2 and 3
Is configured to adjust the vertical position of the. The support member 4 is configured by the above members.

An electrode 48 is interposed between the contact protrusion 46 and the horizontal arm 45, and the contact protrusion 46 and the lower contact plate 2 of the leaf springs 2 and 3 are interposed.
It is designed to detect contact and non-contact with 0.

The horizontally movable base 5 is located below the horizontal portion of the L-shaped vertically movable base 6 and is mounted so as to be horizontally movable via a groove 50. A spring 51 is interposed between the tip of the horizontal portion of the vertically movable base 6 and the upper portion of the horizontally movable base 5, and a bolt 52 is mounted by hanging from the horizontally movable base 5 to the vertically movable base 6. . The bolt 52 is screwed onto the tip of the horizontal portion of the vertically movable base 6, and the horizontal movable base 5 can be moved horizontally by turning the bolt 52. A long hole 63 is formed in a horizontal portion of the vertically movable base 6, and a bolt 53 penetrates through the elongated hole 63 and is screwed into the horizontally movable base 5. The bolt 53 allows the horizontally movable base 5 to be fixed at a predetermined position.

Similarly, the vertical portion of the vertically movable base 6 is mounted on the base 7 via the groove 60 so as to be vertically movable. Then, a spring 61 is interposed between the base 7 and the base 7, and can be vertically moved by a bolt 62. In addition, an elongated hole 64 is provided in this vertical portion, and a bolt 65 penetrates this hole and is screwed into the base 7. The vertically movable base 6 is fixed to a predetermined position in the vertical direction by the bolt 65.

In this embodiment, two sets of the above-mentioned structures are mounted on the base 7 (the number of sets may be further increased depending on the purpose), and the inspection is performed by the two contacts 1. ing. The configuration of the other sets is exactly the same as that described above, and thus the description thereof is omitted.

Next, the usage method will be described.

First, the vertical movable plate 42 is moved to adjust the vertical positions of the leaf springs 2 and 3 to determine the contact pressure of the contact 1. That is,
When the tip ends of the leaf springs 2 and 3 are lifted upward by the contact protrusion 46, the leaf springs 2 and 3 are bent, and the contact pressure of the contactor 1 is obtained by the repulsive force. At this time, in the present invention, at least two leaf springs 2 and 3 are used, and both ends thereof are fixed. Therefore, the contactor 1 moves only up and down and hardly moves in the horizontal direction. This is schematically shown in FIG. 2 in comparison with the case where one leaf spring S is used. (A) shows the case of this invention, (B) shows the case where one leaf spring S is used.
In (A), when the leaf springs 2 and 3 are lifted, an S-shape is drawn to balance the elongation of the leaf springs 2 and 3. Therefore, the contact 1 only moves in the vertical direction and the angle does not change. On the other hand, when one leaf spring S is used, as shown in (B), the contactor 1 is rotated to change its angle, and its tip end is largely moved.

After the contact pressure is set as described above, the vertically movable base 6 is moved up and down to bring the tip of the contactor 1 into contact with the object.

When the contact 1 comes into contact with the object, the contact protrusion 46 and the lower contact plate 20 of the leaf springs 2 and 3 are slightly separated, and the contact protrusion 46,
There is a non-conduction between the contact plates 20, which is detected by the electrode 48. When non-conduction between the contact projection 46 and the contact plate 20 is detected, the vertical movable base 6 is fixed at that position by pushing in about 0.3 mm from that position. The other contact 1 is also adjusted in the same manner, and then these two contacts 1 are moved horizontally in the respective horizontally movable bases 5 to adjust the position in the front-back direction, and at each position, the horizontally movable bases 5 are adjusted. To fix. Then, the object is moved, or the base 7 is moved to bring the contactor 1 into sliding contact with the object to inspect the object. The detection signal of the contact 1 is obtained from the electrode 22.

During sliding, even if the object has irregularities such as a liquid crystal circuit, bouncing does not occur, and the contact of the contactor 1 with the object is maintained. This is because the leaf springs 2 and 3 are composed of two leaf springs, and thus are extremely lightweight. Further, it is considered that this is because the bounce is suppressed because the bending tends to be S-shaped as described in FIG. 2 (A).

As described above, in the above structure, the contact pressure of the contactor 1 can be easily adjusted only by adjusting the vertical position of the support body 4. Moreover, there is no change in the angle of the contactor 1, and even if the object has irregularities, it does not bounce and stable contact can be obtained. Therefore, when applied to a liquid crystal circuit check or the like, stable detection is possible, and there is no danger of damaging the liquid crystal surface, and the sensor is suitable for these fields.

<Effects of the Invention> As described above, the contact sensor of the present invention includes a holding body composed of at least two leaf springs whose both ends and a base are fixed, and a contactor attached to the tip of the holding body. , By supporting the holder from below at an arbitrary position in the vertical direction,
It is configured such that a support body that bends the plate springs to adjust the contact pressure of the contact due to the repulsive force of the plate springs and a means that detects non-contact between the holding body and the support body are provided. Therefore, the contact pressure of the contactor can be easily adjusted, and the contact of the contactor with the object can be detected. Further, there is an effect that the bounce which is a defect of the contact sensor can be suppressed.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, and FIG. 2 is a schematic diagram for explaining the operation. 1: contactor, 2: leaf spring, 3: leaf spring, 4: support,
5: Horizontal movable base, 6: Vertical movable base, 7: Base, 1
0: Holder, 11: Bolt, 20: Contact plate, 21: Bolt, 22: Electrode, 23: Extension arm, 24: Bolt, 40:
Support arm, 41: Bolt, 42: Vertical movable plate, 43: Set screw, 44: Long hole, 45: Horizontal arm, 46: Contact protrusion, 4
7: bolt, 48: electrode, 50: dovetail groove, 51: spring,
52: bolt, 53: bolt, 60: dovetail groove, 61: spring, 62: bolt, 63: long hole, 64: long hole, 65: bolt.

Claims (1)

[Scope of utility model registration request] 1. A holding body composed of at least two leaf springs whose both ends and a base are fixed to each other, a contactor attached to a tip of the holding body, and the holding body from below at an arbitrary position in the vertical direction. A support body that bends the two leaf springs by supporting them to adjust the contact pressure of the contact due to the repulsive force of the leaf springs; and a means for detecting non-contact between the holding body and the support body. A contact sensor characterized by being provided.