JPH0821298B2 - Relay - Google Patents

Description

The present invention relates to a relay with an operation display.

(Prior Art) Conventionally, as one mode of the relay, one shown in FIGS. 3 and 4 has been proposed.

In this relay, the movable iron piece 51 is attracted to and separated from the iron core 41 based on the excitation and demagnetization of the electromagnet 40, and the movable contact 55 attached to the movable contact piece 53 is connected to the fixed contact 62 and the fixed contact 62 in association with the operation. It is operated between the stoppers 62a facing each other to bring the movable contact 55 and the fixed contact 62 into contact with each other and separate them from each other so that the terminals 61 and 63 are electrically connected and disconnected. An operation display mechanism 9 for displaying the state is attached.

This motion display mechanism 9 has a spring-like motion piece 91 on the base 2.
And a protruding portion 93 provided on the movable piece 51 is pressed against the movable iron piece 51, a display portion 95 having a window 94 is provided on the surface of the case 3, and the tip of the operation piece 91 is bent to form a pointer. Part 92
However, based on the operation of the movable iron piece 51, it is made to appear and disappear in the window 94.

(Problems to be Solved by the Invention) However, in the operation display mechanism 9, the movement of the pointer portion 92 observed in the window 94 is obtained by amplifying the movement of the movable iron piece 51. It does not display the contact status of.

Therefore, the contact surfaces of the contacts 55 and 62 are consumed due to repeated contact and also due to the influence of the current conducted through the contacts 5 and 62, and even if the consumed amount exceeds the limit value, the phase changes. The pointer portion 92 maintains a constant movement, and an indication as if the relay is operating normally is displayed.

Therefore, not only can the life of the relay not be known, but even if a trouble occurs, the pointer portion 92 displays a normal state, so it takes time to investigate the cause, and the response is delayed. It was

Further, the moving amount of the movable iron piece 51 depends on the amount of movement of the movable iron piece 51 between the fixed contact 62 and the stopper 62a while the movable contact 55 moves.
In addition to the amount of movement of itself, the amount of movement related to the amount of deflection of the movable contact piece 53 by the urging force of the spring 54 when the movable contact 55 is in pressure contact with the stopper 62a is also included.

Therefore, there is a problem in that the movement amount of the pointer portion 92 varies, the mounting position of the display portion 95 varies from lot to lot, and adjustment of the operation piece 91 is troublesome, leading to a decrease in productivity.

(Means for Solving Problems) The present invention has been made to solve the above problems, and operates a movable part based on excitation and demagnetization of an electromagnet, and at the same time operates a movable contact by the operation of the movable part. In a relay with an operation display, which is brought into contact with and separated from a fixed contact, and operates the operation piece by the movement of the movable part to display the open / closed state of the movable contact and the fixed contact, the operation piece is made of a springy plate material, One end is fixed to the base, and a part of the vicinity of the fixed portion is pressed into contact with the opposite side of the fixed contact in the vicinity of the movable contact. Is used as a pointer portion to amplify the movement of the fixed contact portion to the pointer portion, and a display portion having a contact wear amount recognition portion facing the pointer portion is provided.

(Example) Hereinafter, the present invention will be described with reference to the drawings illustrating an example thereof.

In FIGS. 1 and 2, A is a relay according to the present invention, and the relay A is roughly composed of a housing 1, an electromagnet section 4, a movable section 5, a terminal section 6, and an operation display mechanism 7.

i. Housing 1 The housing 1 is composed of a base 2 made of a non-conductive member and a case 3, and the case 3 is made of a transparent member.

A plurality of engaging portions 21 are formed on the side surface of the base 2, and a plurality of engaging holes 31 corresponding to the engaging portions 21 are formed in the lower portion of the case 3.
Is formed, and by engaging the locking portion 21 with the engagement hole 31, the both are integrated.

Further, the base 2 is provided with a support portion 22, and a screw hole 23 is formed therein.

ii. Electromagnet part 4 The electromagnet part 4 is composed of an electromagnet 40 and a yoke 47.

The electromagnet 40 is configured by winding a coil 44 around a spool 42 having flanges 42a and 42b on an iron core 41, and the flange 42b has a frame 43 having a groove portion 43a extending outside thereof. Are formed.

The yoke 47 is bent in an L-shape, is applied to the groove 43a and the side of the coil 44, and is fixed to the right end (not shown) of the iron core 41 in FIG. An insulating member 48 attached to the spool 42 is interposed therebetween.

A screw hole 49 is formed in the portion of the yoke 47 fixed to the flange 42b from the back side.

iii. Movable part 5 The movable part 5 is roughly composed of a movable iron piece 51, a movable contact piece 53, and a spring 54. The movable iron piece 51 has a support hole 52 formed at one end side in a tip portion of the yoke 47. Engage with,
It is rotatable in the directions of arrows a and a ′ so as to come into contact with and separate from the magnetic pole surface of the iron core 41.

The movable iron piece 51 is constantly urged in the direction of arrow a by a spring 54 whose one end is locked to a protrusion 47a formed on the back surface of the yoke 47.

The movable contact piece 53 is itself made of a spring material,
It has a movable contact 55 at its tip and a fixed portion 54 on the movable iron piece 51.
And the rear portion is extended to the fixed portion side of the iron core 41 by bypassing the outer side of the yoke 47 and the lead portion 53a.
The fixing hole 53b is formed at the end of the fixing hole 53b.

iv. Terminal part 6 The terminal part 6 includes a contact terminal 61, a common terminal 63, a coil terminal 64,6.
It consists of 5, and both are fixed to the base 2 with both ends exposed. A fixed contact 62 is attached to the upper part of the contact terminal 61. The upper exposed portion of the common terminal 63 is bent along the upper surface of the base 2, and the upper end portion thereof extends to the inner surface of the support portion 22 formed on the base 2, and the fixed hole formed at the end portion of the movable contact piece 53. 63b is aligned with the screw hole 23 of the support portion 22.

v. Operation display mechanism 7 The operation display mechanism 7 includes a display plate 71 and an operation piece 77.

The display plate 71 is made of a plate material, and has a lower end fixed to the base 2 to stand upright, an upper end bent along the inner surface of the case 3 to form a display 72, and a portion facing the fixed contact 62. Is bent inward in a U shape to form a stopper 73. Also,
The display section 72 has a window 74 facing the upper surface of the case 3 and a small window 75 formed by widening a part of the window 74 toward the tip side.
On the side of, the life diagnostic mark located on the top surface of the display 72
76 is provided.

The operation plate 77 is made of a spring-like plate material, is arranged along the inner surface of the display plate 71, and has its lower end fixed to the base 2.
A tip portion is bent in the same direction as the display plate 71 to form a pointer portion 78. Further, a portion of the display plate 71 facing the stopper 73 is bent toward the fixed contact 62 side to form a press-fitting portion 79, and is itself shown by a chain line in FIG. 2 when no external force is applied. It is tilted in the direction.

The distances from the fixed portion to the press contact portion 79 and the pointer portion 78 in the operating piece 77 are L ₁ and L ₂ , respectively, and the movement of the press contact portion 79 is k (= L ₁ / L ₂ ) times in the pointer portion 78. It is supposed to be amplified to.

The relay A having the above configuration is assembled as follows.

First, the movable contact 55 is located between the operating piece 77 and the fixed contact 62, and the rear end fixed hole 53a of the movable contact piece 53 is located in the screw hole 49 on the rear surface of the yoke 47. The screw 8 is inserted through the hole 23 and the fixing hole 63a of the common terminal 63.
Screw into the screw hole 49 of the yoke 47 to attach the electromagnet 40 to the base 2
Fixed to.

As a result, the common terminal 63 and the movable contact piece 53 are electrically connected. On the other hand, in the operating piece 77, the pressure contact portion 79 is pushed by the movable contact 55 and is held in the solid line state, and the pointer portion 78 is the display portion.
It is hidden from the window 74 of 72 and set to the state of the dotted line in FIG.

Next, after electrically connecting both ends of the coil 44 to the coil terminals 64 and 65, the case 3 is mounted on the base 2.

The relay A thus assembled operates as follows.

First, from the state shown in FIG. 2, when a current is applied to the coil 44 via the coil terminals 64 and 65, the iron core 41 is excited.

As a result, the movable iron piece 51 is attracted to the iron core 41, rotates in the direction of the arrow a ′ around the support hole 52 against the spring 54,
Contact 55 contacts contact 62. Then, the terminal 61 and the terminal 63, a circuit connecting the contacts 55, 62 and the movable contact piece 53, and the contacts 55,
A circuit connecting 62, the movable contact piece 53, and the yoke 47 is electrically connected.

The operating piece 77 moves by the contact moving distance (l), that is, the distance between the contact surfaces of the movable contact 55 and the fixed contact 62, in a state where the press contact portion 79 is in contact with the movable contact 55 by its own spring force, It becomes the state of the one-dot chain line. The display plate 78 moves by a distance obtained by amplifying the moving distance (l) thereof by k times in accordance with the operation of the contact 55, and appears in the window 74 in a one-dot chain line state in FIG.

When the current applied to the coil terminals 64 and 65 is cut off, the iron core 41 is demagnetized and the movable iron piece 51 is rotated in the direction of arrow a by the urging force of the spring 54 to return to the state shown in FIG. Is separated from the contact 62, and the electrical connection between the terminals 61 and 62 is broken.

The operating piece 77 returns to the solid line state while being pressed by the fixed contact 55, and is positioned by the stopper 73 of the display plate 71.

On the other hand, the pointer portion 78 is retracted from the window 74 and hidden behind the display portion 72, and the pointer portion 78 cannot be observed through the window 74.

By the way, as described above, the movement amount of the pointer portion 78 is obtained by amplifying the movement of the contact 55 by k times.

Therefore, even if the contact surfaces of the contacts 55 and 62 are consumed by l ₁ and l ₂ as shown by the dotted lines, respectively, the consumed amount (l ₁ +
Since l ₂ ) is also amplified k times, contact wear can be easily known.

In particular, the window 74 and the small window 75 are formed respectively, and when the contacts are not consumed, the pointer portion 78 appears and disappears in the window 74, and when the contact is consumed, the consumption amount is displayed in the small window 75 and the contact is displayed. The amount of consumption can be easily known. If the allowable consumption amount is displayed on the life diagnosis mark 75, the life of the relay A can be easily diagnosed.

In the embodiment, the small window 75 is provided in addition to the window 74, and the contact wear amount is displayed here.
Is not always necessary, and a life diagnosing mark may be provided beside the window 74 so that the contact wear amount can be observed here.

Further, in the above-described embodiment, the movable contact piece 53 is attached in a state of being electrically connected to the movable iron piece 51 via the fixed portion 54, but the present invention is not limited to this. However,
When the movable contact piece 53 and the movable iron piece 51 are electrically connected as in the above embodiment, the terminals 61 and 63 are parallel circuits, that is, the contacts 5
Since the circuit connecting 5, 62 and the movable contact piece 53 and the circuit connecting the contacts 55, 62, the movable contact piece 53, the movable iron piece 51, and the yoke 47 are conducted, the movable contact piece 53 is made thin and movable. It is also possible to reduce the operating load of the iron piece 51 as much as possible.
It can also open and close large currents.

Further, as shown in the above-mentioned embodiment, if the display plate 71 is erected from the base 2 and the display portion 72 is provided at the tip end thereof, the movement of the movable portion such as the movable iron piece 51 may vary. , Or even if there is an error in its attachment, before attaching the housing 1 to the base 2,
71 and / or action piece 77
Positioning adjustment of 72 and pointer 78 can be performed accurately and quickly.

(Effects of the Invention) As is clear from the above description, in the relay according to the present invention, a part of the operating piece is brought into contact with the vicinity of the movable contact, the movement of the movable contact is amplified by the pointer portion, and the movement thereof is performed. Can be observed on the display.

Therefore, the open / closed state of the contact can be observed through the pointer portion, and the contact wear amount can be detected, so that the life of the relay can be accurately diagnosed.

Therefore, it is possible to prevent a trouble related to wear of the contact portion of the relay, and it is possible to easily detect a failure of the relay.

In addition, the movement of the operating piece is determined only by the movement of the movable contact and is not affected by the moving contact piece or the like, so that the position adjustment is easy and the productivity can be improved.

[Brief description of drawings]

1 and 2 show a relay according to the present invention, FIG. 1 is a partially cutaway plan view, FIG. 2 is a partially cutaway side view, FIGS. 3 and 4 are conventional relays, and FIG. 3 is The plan view and FIG. 4 are partially cutaway side views thereof. A ... Relay, 1 ... Housing, 2 ... Base, 3 ...
… Case, 4 …… Electromagnet part, 5 …… Movable part, 6 …… Terminal part, 7 …… Operation display mechanism, 40 …… Electromagnet, 41 …… Iron core,
44 …… coil, 47 …… yoke, 51 …… movable iron piece, 53 ……
Movable contact piece, 53a ... Lead part, 55 ... Movable contact, 61 ...
… Contact terminal, 62 …… fixed contact, 63 …… common terminal, 64,65
...... Coil terminal, 71 ...... Display board, 72 ...... Display section, 73 ......
Stopper, 74 ... Window, 75 ... Small window, 76 ... Mark, 77 ...
… Operating piece, 78 …… Indicator part, 79 …… Pressing contact part.

Claims (1)

[Claims] 1. A movable part is operated based on the excitation and demagnetization of an electromagnet, the movable contact is brought into contact with and separated from a fixed contact by the operation of the movable part, and the movable piece is caused to operate by an operation piece by the movement of the movable part. In a relay with operation display for displaying the open / closed state of a movable contact and a fixed contact, the operation piece is made of a spring-like plate material, one end of which is fixed to a base, and a part of the vicinity of the fixed part is fixed near the movable contact. The pressure is applied to the opposite side of the contact side, and the other end having a larger distance from the pressure contact part than the distance between the pressure contact part and the fixed part is used as a pointer part to amplify the movement of the fixed contact to the pointer part, and A relay characterized by having a display section provided with a contact wear amount recognition section facing the pointer section.