JP2001155608A - Method for adjusting characteristics of relay - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for adjusting characteristics of a relay by adjusting an over-travel amount of a relay in which a oscillation block mounted on a relay main body oscillates a contact spring in such a manner that the contact spring can be contacted with and separated from a fixed contact, by gripping a base portion of the contact spring by a chuck and rotating the chuck, with an improved adjustment precision of the over-travel amount. SOLUTION: An initial value of an over-travel amount is measured to calculate an adjustment amount; a rotation amount is found from a correlation between a previously stored adjustment amount and a rotation amount of a chuck 6; a base portion 3a of a contact spring 3 is gripped by the chuck 6 thereby detecting an amount of rotation deviation of the contact spring 6; and the rotation amount of the chuck 6 is corrected by a slippage amount of the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay characteristic adjusting method for adjusting an overtravel amount of a relay in which an armature having a contact spring is swingably mounted on a relay body.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, in a relay 5 in which an armature provided with a contact spring 3 is swingably attached to a relay body 1, a method of adjusting the characteristic of the relay for adjusting an overtravel amount is as follows. By holding the base 3a of the contact spring 3 between the chucks 6 and rotating the chuck 6 by a predetermined adjustment amount,
This is performed by plastically deforming the base 3a.

The relay 5 includes a fixed contact 4, a contact spring 3, a swing block 2, a permanent magnet, and an electromagnet block. The current balance of the permanent magnet and the electromagnet block is changed by controlling the current to the electromagnet block. Thus, the swing block 2 is swung in the horizontal direction, and the swing of the swing block 2 enables the movable contact and the fixed contact 4 of the contact spring 3 disposed horizontally opposed to each other to be controlled. The chuck 6 has a rotation axis in a substantially vertical direction and is rotatable by a rotation drive unit 7, and is opposed to the chuck body 6 c so that the base 3 a of the contact spring 3 is inserted into the lower end of the chuck body 6 from both sides. The relay 5 to be assembled is formed and provided above the contact spring 3 base 3a so as to be vertically movable and supported.

[0004] The overtravel amount refers to a movable amount of the movable contact in a state where the movable contact is in contact with the fixed contact 4, and is adjusted as described below. First, the overtravel amount of the relay 5 in the assembled state is initially measured. Next, the chuck 6 is lowered until both claws 6a and 6b are positioned on both sides of the base 3a of the contact spring 3, respectively. The base 3a of the contact spring 3 is sandwiched between the claws 6a and 6b and stored in advance. The rotation driving unit 7 is driven to rotate the chuck body 6c by the rotation amount obtained from the correspondence between the adjusted amount and the rotation amount of the chuck 6. As a result, the movable contact provided at the free end 3c of the contact spring 3 moves, the distance between the movable contact and the fixed contact 4 fluctuates, and the overtravel amount of the relay 5 is appropriately adjusted.

[0005]

However, according to the above-described conventional method for adjusting the characteristics of the relay, if the direction of the holding surface of the two claws 6a and 6b does not coincide with the surface direction of the base of the contact spring, the two claws are not used. When the base of the contact spring is sandwiched between 6a and 6b, the surface direction of the base is corrected to the direction of the holding surface of the both claws 6a and 6b, and the base rotates by the two angles. When the base is rotated by a predetermined rotation amount from the position after the movement, a desired overtravel amount may not be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for adjusting the characteristics of a relay in which the accuracy of adjusting the overtravel amount is improved.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, a swing block mounted on a relay body swings a contact spring so as to be able to contact and separate a fixed contact from a fixed contact. In the relay characteristic adjusting method of adjusting the overtravel amount by sandwiching the base of the contact spring with the chuck and rotating the chuck, an initial value of the overtravel amount is measured and the adjustment amount is calculated and stored in advance. Obtain the amount of rotation from the correspondence between the adjustment amount and the amount of rotation of the chuck, detect the amount of rotation deviation of the contact spring caused by sandwiching the base of the contact spring with the chuck, and correct the amount of rotation of the chuck based on the amount of rotation deviation. The feature is constituted.

In such a method for adjusting the characteristics of the relay, the amount of rotation of the contact spring due to the chuck sandwiching the base of the contact spring is detected, and the amount of rotation of the chuck is corrected by the amount of rotation. By rotating the chuck by the subsequent rotation amount, it is possible to adjust to a predetermined overtravel amount.

Further, according to the invention described in claim 2, according to claim 1,
In the described invention, detecting the lateral displacement amount of the contact spring by sandwiching the base of the contact spring with the chuck, sliding the chuck in the lateral direction, correcting the lateral displacement amount, and then detecting the rotational displacement amount of the contact spring. It is configured as a feature.

In such a method for adjusting the characteristics of the relay, the amount of lateral displacement of the contact spring caused by sandwiching the base of the contact spring with the chuck is detected, and the lateral displacement of the chuck is corrected. Since the rotational displacement is detected, even if the contact spring is laterally displaced when the base of the contact spring is sandwiched by the chuck, the rotational displacement of the contact spring can be correctly measured.

According to the third aspect of the present invention, there is provided the first aspect.
In the inventions described in (2) and (3) above, the surface of the contact spring is irradiated with laser light, and the reflected light is measured to detect the rotational displacement or the lateral displacement of the contact spring.

In such a method of adjusting the characteristics of the relay, the rotational displacement or the lateral displacement of the contact spring is detected by irradiating the surface of the contact spring with a laser beam and measuring the reflected light. The amount of rotation deviation or the amount of lateral deviation can be measured in a non-contact manner, and the measurement accuracy is improved.

[0013] According to the fourth aspect of the present invention, in the first aspect,
In the inventions of (3) to (3), the amount of rotational displacement or the amount of lateral displacement of the contact spring is detected at a plurality of positions along the direction orthogonal to the chuck rotation axis on the surface of the contact spring.

In such a method for adjusting the characteristics of the relay, the rotational displacement or lateral displacement of the contact spring is detected at a plurality of positions on the surface of the contact spring along the direction orthogonal to the chuck rotation axis. Both displacements can be measured with high accuracy.

According to the fifth aspect of the present invention, the overtravel amount of the relay, in which the swing block attached to the relay main body swings the contact spring so as to be able to contact and separate from the fixed contact,
In the method of adjusting the characteristics of the relay, in which the base of the contact spring is sandwiched by the chuck and rotated by rotating the chuck, the initial value of the overtravel amount is measured and the adjustment amount is calculated.
The rotation amount is obtained from the correspondence between the adjustment amount stored in advance and the rotation amount of the chuck, and the rotation of the contact spring is eliminated by shifting the chuck after sandwiching the base of the contact spring. I have.

In such a relay characteristic adjustment method, the initial value of the overtravel amount is measured to calculate the adjustment amount,
The rotation amount is obtained from the correspondence between the adjustment amount stored in advance and the rotation amount of the chuck, and the chuck is shifted after sandwiching the base of the contact spring to eliminate the rotation shift of the contact spring. Without fixing, the chuck can be rotatably fixed in this state, and then the chuck can be rotated to rotate the base by a predetermined amount of rotation so that the desired overtravel can be adjusted.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method for adjusting the characteristics of a relay according to an embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing a method for adjusting the characteristics of a relay according to an embodiment of the present invention.
(B) is under adjustment. FIG. 2 is a plan view showing a method for adjusting the characteristics of the above relay. FIG. 3 is an explanatory diagram for explaining a method of adjusting the characteristics of the above relay.

The method of adjusting the characteristics of the relay is as follows. The swing block 2 attached to the relay body 1 swings the contact spring 3 so that the contact spring 3 can be moved toward and away from the fixed contact 4. The adjustment is performed by sandwiching the base 3a between the chucks 6 and rotating the chucks 6, measuring the initial value of the overtravel amount and calculating the adjustment amount,
The amount of rotation is obtained from the correspondence between the adjustment amount stored in advance and the amount of rotation of the chuck 6, and the amount of rotation deviation of the contact spring 3 due to the chuck 6 sandwiching the base 3a of the contact spring 3 is detected. The amount of rotation of the chuck 6 is corrected based on the amount of displacement. Further, the amount of rotation deviation of the contact spring 3 is detected by irradiating the surface of the contact spring 3 with the laser beam 9 and measuring the reflected light 9b.

The relay 5 includes, for example, a fixed contact 4, a contact spring 3, an oscillating block 2, a permanent magnet, and an electromagnet block. The magnetic force balance between the permanent magnet and the electromagnet block is controlled by controlling the current to the electromagnet block. Is changed to swing the swing block 2 in the horizontal direction, and the swing of the swing block 2 makes it possible to control the movable contact of the contact spring 3 and the fixed contact 4 that are horizontally opposed to each other. .

Two fixed contacts 4 are used in the form of a plate, are erected on the left and right sides of the front end of the relay body 1 and are arranged upright, and are respectively connected to fixed pins projecting from the lower surface of the front end of the relay body 1. . The contact spring 3 includes a base 3a, a bent portion 3
b, two substantially U-shaped members having a free end 3c are used, the base 3a is fixed to the left and right sides of the center of the relay body 1, the bent portion 3b is directed rearward, and the free end 3c is positioned at the front end. It is located opposite to the fixed contact 4 inward. The bases 3a are respectively connected to central pins protruding from the lower surface of the central portion of the relay main body 1. Base plate 1 on relay body 1
A substantially rectangular tube-shaped portion 1a having an opening at the front is formed on b, and permanent magnets (not shown) and electromagnet blocks (not shown) are arranged on the left and right sides inside the substantially rectangular tube-shaped portion 1a. Have been. A terminal for supplying a current to the electromagnet block is juxtaposed on the lower surface of the rear end of the relay body 1.
The swing block 2 includes a rod-shaped swing portion 2b having a magnetic body.
And a flange portion 2 having a front end portion of the swing portion 2b extending left and right.
a swinging portion 2b is slidably provided inside the substantially rectangular cylindrical portion 1a, and the flange portion 2a protrudes from the opening of the substantially rectangular cylindrical portion 1a. . Cuts are respectively formed in the left and right ends of the flange portion 2a, and the distal ends of the free ends 3c of the contact springs 3 are fixed through the cuts.

The operation of the relay 5 will be described below. The oscillating portion 2b of the oscillating block 2 is attracted by the magnetic force of the permanent magnet and is deflected to one of the right and left, and the flange portion 2a
Is also deviated to one of the right and left with the movement of the swinging portion 2b. At this time, the free end 3c of the contact spring 3 on the side fixed to the notch on the biased side of the flange portion 2a moves outward in the left-right direction, and is in contact with the fixed contact 4 to conduct electricity.
When a current is applied to the terminal, the swinging portion 2b of the swinging block 2 is drawn to the opposite side by the action of the electromagnet block,
The contact spring 3 in the contact state is separated from the fixed terminal. Then, the contact spring 3 on the opposite side similarly contacts the fixed contact 4 to conduct electricity.

The chuck 6 has a rotation axis in a substantially vertical direction and has a chuck body 6 c rotatable by a rotation drive unit 7.
And two claw portions 6a opposed to each other, into which the base 3a of the contact spring 3 is inserted into the lower end portion of the chuck body 6c with scissors from both sides.
The relay 5 is formed and provided above the contact spring 3 base 3a of the relay 5 to be assembled and supported so as to be vertically movable. One of the claw portions is fixed to the lower end portion of the chuck body 6c and is formed as a fixed claw portion 6b.
The movable claw 6a is supported by the chuck body 6c so as to be slidable in the direction b. This movable claw portion 6a
Is driven to slide by the control of the sandwiching control unit, and the contact and separation with the fixed claw portion 6b is controlled. A stepping motor, a servomotor, or the like is used as the rotation drive unit 7, and the rotation is controlled by the number of applied pulses.

A relay 5 arranged at a predetermined position of the inspection device
The laser distance measuring device 8 is arranged on the side of the contact spring 3. The laser distance measuring device 8 emits a laser beam to an object to be measured, receives a reflected laser beam, and measures a distance to the object to be measured based on a time difference between the emitted light and the received light. In this case, the contact spring 3 is an object to be measured, and the contact point is arranged so that the irradiation point is located near the base 3a on the side surface of the contact spring 3.

The method of adjusting the overtravel amount will be described below with reference to FIG. In the drawing, the surface direction of the base 3a of the contact spring 3 is defined as the X direction, and the direction orthogonal to the surface of the base 3a of the contact spring 3 is defined as the Y direction.

First, the initial value of the overtravel amount of the relay 5 in the assembled state is determined by measuring the swing stroke of the swing block 2.

Next, the difference between the initial value of the overtravel amount and the target value is used as the adjustment amount, and the target value α of the rotation amount is obtained from the correspondence between the adjustment amount stored in advance and the rotation amount of the chuck 6.
(In this case, α = α1).

Next, as shown in FIG. 3A, a laser is emitted by a laser distance measuring device 8 to an irradiation point set near the base 3a of the contact spring 3, and a reflected laser is received.
The distance to the irradiation point, that is, the initial value of the position of the base 3a is measured based on the time difference between the light emission and the light reception. The irradiation point is the base 3 which is not hidden by the claw on the surface of the contact spring 3.
One point is set in the vicinity of a, and the distance in the X direction from the base 3a (in this case, X1) is measured.

Next, as shown in FIG.
The chuck 6 is lowered until the bases 3a of the contact spring 3 are positioned on both sides of the contact spring 3, respectively, and the base 3a of the contact spring 3 is sandwiched between the claws 6a and 6b. At this time, both claw portions 6
If the directions of the opposing surfaces of the bases 3a and 6b are not parallel to the X direction, the bases 3a are sandwiched between the bases 6a and 6b.
Assuming that the angle difference between the a and 6b with respect to the opposing surfaces is the rotational deviation, the base 3a rotates by the amount of the rotational deviation (β1 in this case) and undergoes plastic deformation. The laser displacement is measured again by the laser distance measuring device 8 by emitting and receiving the laser at the irradiation point of the contact spring 3. In this case, it is assumed that the position of the irradiation point has moved by Y1 in the Y direction due to the amount of rotation deviation. The rotation deviation amount β1 is obtained from the values of Y1 and X1. The calculation of the rotation deviation amount β1 is performed by the laser distance measurement device 8.
The calculation result is transmitted to the control unit of the rotation drive unit 7, and the control unit sets the rotation amount target value α to α.
= Θ1 = α1-β1.

Next, the target value of the corrected rotation amountΘ1
The chuck 6 is driven to rotate by the rotation drive unit 7 by the amount of. As a result, the base 3 held between the claws 6a and 6b
a rotates and plastically deforms, and the overtravel amount of the relay 5 is appropriately adjusted.

In such a method of adjusting the characteristics of the relay, the amount of rotation of the contact spring 3 due to the chuck 3 sandwiching the base 3a of the contact spring 3 is detected, and the amount of rotation of the chuck 6 is corrected based on the amount of rotation deviation. Therefore, by rotating the chuck 6 by the corrected amount of rotation, the amount of overtravel can be adjusted to a predetermined amount. In addition, since the rotational displacement or lateral displacement of the contact spring 3 is detected by irradiating the surface of the contact spring 3 with the laser beam 9 and measuring the reflected light 9b, the rotational displacement or lateral displacement of the contact spring 3 is detected. Can be measured without contact, and the measurement accuracy is improved.

FIG. 4 is an explanatory diagram for explaining a method for adjusting the characteristics of a relay, which is different from the above-mentioned embodiment of the present invention.

As shown in FIG. 4, the method for adjusting the characteristics of this relay is substantially the same as the method for adjusting the characteristics of the relay shown in the above. The difference is that the lateral displacement of the contact spring 3 due to the base 3a of the contact spring 3 being sandwiched by the chuck 6 is detected,
The purpose is to detect the rotational displacement of the contact spring 3 after sliding the chuck 6 in the lateral direction to correct the lateral displacement.

The rotation drive unit 7 has a slide control mechanism for rotating the chuck 6 and holding the chuck 6 slidably in the Y direction.

First, as shown in FIG. 4A, the initial value of the overtravel amount is calculated, the target value α (= α1) of the rotation amount is calculated, and the laser distance is set in the same manner as in the relay characteristic adjustment method shown in FIG. The measurement device 8 sequentially measures the initial value of the position of the irradiation point. Two irradiation points are set, and the distance in the X direction from the center of rotation is X1 near the base 3a and X2 far from the base 3a.

Next, as shown in FIG.
The chuck 6 is lowered until a and 6b are located on both sides of the base 3a of the contact spring 3, respectively, and the base 3a of the contact spring 3 is sandwiched between the claws 6a and 6b. At this time, both claw portions 6
When the positions of the opposing surfaces of the bases 3a and 6b are shifted in the Y direction, when the base 3a is held between the bases 6a and 6b,
The base 3a is laterally displaced in the Y direction by the amount of lateral displacement of the bases 3a and 6b from the opposing surfaces in the Y direction, and is plastically deformed. This Y
In order to eliminate plastic deformation in the direction, measure the amount of lateral displacement,
An operation of returning the base 3a to the original position is performed.

In the operation of returning the lateral deviation, first, the lateral deviation amounts Y1 and Y2 at two irradiation points are measured, and X1 and
X2, Y1, Y2, lateral displacement Y0 at the center of the base 3a
Is calculated. The calculation of the lateral displacement amount Y0 is performed by an arithmetic unit provided in the laser distance measuring device 8. Next, the calculation result is transmitted to the control unit of the rotation drive unit 7, and the control unit operates the slide control mechanism to return the chuck 6 to the original position by the amount of lateral displacement Y0. After the operation of returning the lateral deviation, the rotational deviation amount β1 is calculated in the same manner as in the method of adjusting the characteristics of the relay, and the target value α of the rotational amount is set to α = Θ1 = α1.
Correct to -β1.

In such a method of adjusting the characteristics of the relay, the amount of lateral displacement of the contact spring 3 caused by sandwiching the base 3a of the contact spring 3 by the chuck 6 is detected, and the lateral displacement of the chuck 6 is corrected. Since the rotational displacement of the contact spring 3 is detected after the contact
Even if the contact spring 3 is shifted sideways when the base 3a of
The rotation deviation amount of the contact spring 3 can be correctly measured.

In the method for adjusting the characteristics of the relay, the irradiation point is set at two points to calculate the lateral shift amount.
3 along the direction perpendicular to the rotation axis of the chuck 6 on the surface of the contact spring 3
The rotational displacement amount or the lateral displacement amount of the contact spring 3 may be detected at more than two positions. In this case, the lateral displacement amount can be obtained from the average value of the lateral displacement amounts of the irradiation points, and the lateral displacement amount can be measured with more accuracy from more information.

As for the amount of rotational deviation, the rotation driving unit 7 is operated to rotate and drive the chuck 6 by a predetermined amount of rotational deviation, similarly to the operation of returning the lateral deviation in the method of adjusting the characteristics of the relay. Correction is also possible. For example, after detecting the rotational deviation β1, the control unit of the rotation driving unit 7 rotates the chuck 6 by the rotational deviation β1, returns the base 3a to the original position, and sets the rotational deviation to zero. After that, the chuck 6 is rotated by a predetermined target value α1 to plastically deform the base 3a.

In such a relay characteristic adjustment method, an adjustment value is calculated by measuring an initial value of an overtravel amount.
Since the amount of rotation is determined from the correspondence between the adjustment amount stored in advance and the amount of rotation of the chuck 6, the chuck 6 is shifted after sandwiching the base 3a of the contact spring 3 to eliminate the rotational displacement of the contact spring 3. After the chuck 6 is rotatably fixed in this state without correcting the rotational deviation, the chuck 6 is rotated to rotate the base 3a by a predetermined amount of rotation, so that the desired overtravel amount can be adjusted.

[0042]

According to the first aspect of the present invention, the amount of rotation of the contact spring caused by sandwiching the base of the contact spring with the chuck is detected, and the amount of rotation of the chuck is corrected by the amount of rotation. By rotating the chuck by the subsequent rotation amount, it is possible to adjust to a predetermined overtravel amount. Therefore, even if the chuck and the base are displaced in the rotation direction, the overtravel amount can be adjusted with high accuracy.

According to the second aspect of the present invention, the lateral displacement of the contact spring caused by sandwiching the base of the contact spring with the chuck is detected, and the lateral displacement of the chuck is corrected to correct the lateral displacement. Since the rotational displacement is detected, even if the contact spring is laterally displaced when the base of the contact spring is sandwiched by the chuck, the rotational displacement of the contact spring can be correctly measured. Therefore, even if the chuck and the base are displaced in the lateral direction, the overtravel amount can be adjusted with high accuracy.

According to the third aspect of the present invention, the amount of rotation or lateral displacement of the contact spring is detected by irradiating the surface of the contact spring with a laser beam and measuring the reflected light. The amount of rotation deviation or the amount of lateral deviation can be measured in a non-contact manner, and the measurement accuracy is improved.

According to the fourth aspect of the present invention, the rotational displacement or lateral displacement of the contact spring is detected at a plurality of positions along the direction orthogonal to the chuck rotation axis on the contact spring surface.
Both displacement amounts can be measured with high accuracy from more information.

According to the fifth aspect of the present invention, the adjustment amount is calculated by measuring the initial value of the overtravel amount, and the rotation amount is calculated from the correspondence between the adjustment amount and the rotation amount of the chuck stored in advance. Because the chuck is shifted after sandwiching the base of the contact spring to eliminate the rotational displacement of the contact spring,
After the chuck is rotatably fixed in this state without correcting the rotational deviation, the chuck can be rotated to rotate the base by a predetermined amount of rotation to adjust the overtravel to a desired amount.

[Brief description of the drawings]

FIGS. 1A and 1B are perspective views showing a method for adjusting the characteristics of a relay according to an embodiment of the present invention, wherein FIG. 1A is before adjustment and FIG.

FIG. 2 is a plan view showing a method for adjusting the characteristics of the above relay.

FIG. 3 is an explanatory diagram illustrating a method for adjusting the characteristics of the relay.

FIG. 4 is an explanatory diagram illustrating a relay characteristic adjustment method different from the above according to the embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional method for adjusting the characteristics of a relay.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Relay main body 1a Substantially square tubular part 1b Base plate 2 Swing block 2a Flange part 2b Swing part 3 Contact spring 3a Base 3b Bend part 3c Free end part 3d Contact part 4 Fixed contact 4a Contact part 5 Relay 6 Chuck 6a Movable Claw part 6b Fixed claw part 6c Chuck body 7 Rotation drive part 8 Laser distance measuring instrument 9 Laser light 9a Irradiation light 9b Reflected light

Claims (5)

[Claims] 1. An overtravel amount of a relay in which a swing block attached to a relay body swings a contact spring so as to be able to contact and separate from a fixed contact by adjusting a base of the contact spring with a chuck and rotating the chuck. In the method of adjusting the relay characteristics, the initial value of the overtravel amount is measured to calculate the adjustment amount, the rotation amount is determined from the correspondence between the adjustment amount stored in advance and the rotation amount of the chuck, and the contact point is determined by the chuck. A method for adjusting the characteristics of a relay, comprising detecting a rotational displacement amount of a contact spring caused by sandwiching a base portion of a spring, and correcting a rotational amount of a chuck based on the rotational displacement amount. 2. The method according to claim 1, wherein a lateral displacement of the contact spring caused by sandwiching the base of the contact spring with the chuck is detected, and the lateral displacement of the contact spring is corrected to detect the rotational displacement of the contact spring. The method for adjusting the characteristics of a relay according to claim 1, wherein: 3. The characteristics of the relay according to claim 1, wherein the contact spring is irradiated with a laser beam and the reflected light is measured to detect the rotational displacement or the lateral displacement of the contact spring. Adjustment method. 4. The method according to claim 3, wherein the rotational displacement or the lateral displacement of the contact spring is detected at a plurality of positions along the direction orthogonal to the chuck rotation axis on the surface of the contact spring. 5. An overtravel amount of a relay in which a swing block attached to a relay body swings a contact spring so as to be able to contact and separate from a fixed contact by adjusting a base of the contact spring by a chuck and rotating the chuck. In the relay characteristic adjustment method, the initial value of the overtravel amount is measured to calculate the adjustment amount, the rotation amount is obtained from the correspondence between the adjustment amount stored in advance and the chuck rotation amount, and the contact spring is adjusted. A method for adjusting the characteristics of a relay, characterized in that a contact spring is rotated by shifting a chuck after a base is sandwiched.