JP5496234B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to a solenoid-type electromagnetic relay that opens and closes electrical contacts by driving a plunger with electromagnetic force, for example.

  Various types of solenoid-type electromagnetic relays that attract and attract a plunger by electromagnetic force to open and close contacts have been developed and widely used. For example, in a conventional electromagnetic relay, when the plunger is attracted by electromagnetic force, the movable contact is pressed against the fixed contact by the contact spring, and the closed state is reached. The contact is separated from the fixed contact and the open circuit state is maintained. Further, the movable contact is connected to a pair of fixed contacts formed on a part of the main terminal in a contact chamber having substantially the same shape as the movable contact provided on the inner surface of the cap formed of a non-conductive member. Is pressed by a contact spring abutted against the inner surface of the cap (Patent Document 1).

JP 2006-260984 A

The conventional electromagnetic relay is fixed without being fixed between the opening end of the cap and the end surface of the contact chamber until the movable contact is inserted into the contact chamber of the substantially same shape during assembly work to incorporate the movable contact into the cap inner surface. Assembling is difficult because the contact abutting portion (the placement surface portion for placing the fixed contact. The fixed contact placement surface portion) is buffered.
In addition, in order to improve the assemblability, a jig for inserting the movable contact is required. In any case, the assemblage deteriorates and the cost increases due to the jig or the like.

  The present invention has been made in order to solve the above-described problems, and at the time of assembling work for incorporating the movable contact into the cap, the movable contact is not buffered by other parts arranged in the cap. It is an object of the present invention to obtain an electromagnetic relay capable of stably performing an insertion operation from the open end of the metal to the contact chamber.

The electromagnetic relay according to the present invention is an electromagnetic relay that opens and closes a fixed contact by driving a movable contact, and the fixed contact is fixed in the opening that is opened to a predetermined size from the opening end of the cap. The movable contact is disposed on a fixed contact placement surface portion for arranging the contact, and the movable contact is slidably disposed in the contact storage chamber opened deeper from the fixed contact placement surface portion of the cap. The fixed contact is symmetrically arranged around the movable contact having a substantially quadrangular planar shape, and a part of the movable contact is fitted to the inner surface of the cap that houses the movable contact when the movable contact is assembled. guide portion for the, to another two sides to the side edge close to the fixed contacts of the movable contact, contact housing chamber for housing the movable contact from the open end of the cap along the driving direction of the movable contact In which it provided as extending in.

  When assembling the movable contact in the contact storage chamber in the cap, the electromagnetic relay of the present invention allows the guide portion to be fitted to the guide portion extending from the opening end of the cap to the contact storage chamber, A movable contact can be moved to a contact storage chamber along.

It is sectional drawing of the electromagnetic relay of Embodiment 1 of this invention. It is a figure which shows the cap and movable contact which comprise the electromagnetic relay of Embodiment 1 of this invention. It is a figure which shows the cap and movable contact which comprise the electromagnetic relay of Embodiment 2 of this invention. It is a figure which shows the cap and movable contact which comprise the electromagnetic relay of Embodiment 3 of this invention. It is a figure which shows the cap and movable contact which comprise the electromagnetic relay of Embodiment 4 of this invention. It is sectional drawing of the electromagnetic relay of Embodiment 5 of this invention.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of an electromagnetic relay according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view and a plan view of a cap constituting the electromagnetic relay, and a plan view of a movable contact. These are sectional drawings which follow the AA line of the cap top view shown in FIG.2 (b).
1 mainly includes a case 10, an exciting coil 11, a bobbin 12, a contact side magnetic core 13, a plunger 14, a magnetic core 15, a packing 16, and a non-conductive for contact separation. The member 17, the return spring 18, the nonconductive member 19, the cap 30, the main terminal 21, the contact spring 22, and the movable contact 23 are configured.

  The exciting coil 11 is wound around the bobbin 12. A contact-side magnetic core 13 is arranged from one end or one end of the bobbin 12 to the inner diameter portion, and a magnetic core 15 is formed at the other end. Furthermore, plungers 14 are arranged on the inner diameter of the bobbin 12, and they are stored in the case 10 in a configuration in which the contact-side magnetic core 13 closes the opening of the case 10. A non-conductive cap 30 is disposed on the case 10 and the contact side magnetic core 13 via the packing 16.

A pair of main terminals 21 having a part of a screw are inserted into a main terminal insertion portion 33 opened in a part of the cap 30 and arranged in a state of being held by the cap 30. A pair of fixed contacts 21a formed in a part of each main terminal 21 has an opening (see FIG. 2A) that is opened to a predetermined dimension (depth along the axial direction) from the opening end of the cap 30 on the packing 16 side. ) The axial opening dimension is indicated by the symbol A in FIG. 9) It is arranged on a placement surface portion (contact portion; fixed contact placement surface portion) for placing the fixed contact 21 a in 31.

  An opening dimension is indicated by a contact accommodating chamber (reference symbol B in FIG. 2A) in a gap between the fixed contact 21a and the inner surface of the cap 30, which is opened deeper than the opening 31 opened from the opening end of the cap 30. .) 32 is provided. In the contact storage chamber 32, a movable contact movable range (opening dimension is indicated by a symbol C in FIG. 2A) 32a in which the movable contact 23 slides, and a contact spring 22 in which the movable contact 23 can be moved are disposed. The spring arrangement part (area | region shown with the code | symbol E in Fig.2 (a)) 32b is included. In the contact storage chamber 32, the movable contact 23 pressed by the contact spring 22 which is in contact with the cap 30 is disposed so as to be slidable in the contact storage chamber 32, and the movable contact 23 is pressed by the fixed contact 21a. .

  When the movable contact 23 slides, a part of the movable contact 23 is fitted into a guide portion 30a formed on the inner surface of the cap 30 shown in FIGS. 2 (a) and 2 (b). The guide portion 30a is a concave groove formed from the inner side surface of the cap 30 toward the outer side surface, and ranges from the opening end of the cap 30 indicated by the symbol D in FIG. (Corresponding to the range indicated by reference sign A and reference sign C) is formed along the axial direction of the movable contact 23. Note that the axial direction of the movable contact 23 and the drive direction of the movable contact 23 are the same direction. Further, the part of the movable contact 23 fitted to the guide portion 30a is a fitting portion 30b formed as a convex protrusion around the movable contact 23 as shown in FIG. Here, the contact housing including the guide portion 30a and the fitting portion 30b so that the movable contact 23 shown in FIG. 2C is fitted into the opening of the contact housing chamber 32 shown in FIG. 2B. Needless to say, the chamber 32 and the movable contact 23 are formed to have shapes corresponding to each other.

  Further, in the space between the fixed contact 21 a and the contact-side magnetic core 13, the contact separation non-conductive member 17, one of which is in contact with the plunger 14, and a part of the contact separation non-conductive member 17 are contacted. A return spring 18 and a nonconductive member 19 in contact with the return spring 18 are disposed. Since the non-conductive member 19 receives the reaction force of the return spring 18, the other is brought into contact with a part of the cap 30 or the opposite contact surface of the fixed contact 21a.

  Here, in the electromagnetic relay of FIG. 1, the movable contact 23 is normally closed by the reaction force of the contact spring 22 and when the voltage is applied to the excitation coil 11 by a power source (not shown), the plunger 14 is moved by the electromagnetic force. This is a normally closed contact type electromagnetic relay that is attracted to the contact side magnetic core 13 side and the movable contact 23 is separated from the fixed contact 21 a by the contact separating non-conductive member 17.

  In addition, the movable contact 23 is formed in a substantially flat plate shape extending perpendicularly to the drive (axis) direction, and a fitting portion 30b having a shape corresponding to the guide portion 30a is provided around the movable contact 23. As shown in an example of the planar shape of the movable contact 23 in FIG. 2C, the movable contact 23 having a substantially flat plate shape is centered on the movable contact 23 out of the four sides of the movable contact 23 having a substantially rectangular planar shape. At least one fitting portion 30b is provided on two sides (two sides located in a region surrounded by a broken line indicated by reference numeral s) different from the side adjacent to the two fixed contacts 21a arranged symmetrically as It is done. In the example of FIG. 2C, convex fitting parts 30b are provided at both ends of one side, and the movable contact 23 as a whole is provided with four fitting parts 30b at four corners of a substantially rectangular shape. It is in the state that was.

Further, the protruding direction of the guide portion 30a is the left side direction or the right side direction as referred to on the paper surface in FIG. The two sides of the movable contact 23 on the side close to the main terminal 21 are not in contact with the inner side surface of the cap 30 in the cap opening 31. In the present invention, the guide portion 30 a is connected to the opening end of the cap 30. In order to continuously provide the contact storage chamber 32, two sides (two sides surrounded by a broken line indicated by reference sign s) other than the two sides of the movable contact 23 adjacent to the main terminal 21 are the cap 30. The guide portion 30a is arranged and formed by paying attention to continuously contact the inner surface of the cap 30 between the opening end portion and the contact accommodating chamber 32.
Furthermore, the same number of guide portions 30a are provided on the inner surface of the cap 30 at positions corresponding to the fitting portions 30b of the movable contact 23. As described above, the guide portions 30a are provided on the inner surface of the cap 30. , And is provided so as to extend from the contact storage chamber 32 to the opening end face of the cap 30.

  In the first embodiment of the present invention, as described above, the guide portion 30a for fitting a part of the movable contact 23 when the movable contact 23 is assembled is movable on the inner surface of the cap 30 that houses the movable contact 23. When the movable contact 23 is assembled in the cap 30 because it is configured to extend from the opening end of the cap 30 to the contact storage chamber 32 that stores the movable contact 23 along the drive direction of the contact 23. In particular, the fitting part 30b of the movable contact 23 is disengaged from the guide part 30a by inserting the fitting part 30b of the movable contact 23 according to the guide part 30a of the cap 30 without requiring a special jig or the like. Therefore, the movable contact 23 can be easily accommodated in the contact storage chamber 32 without being buffered on the mounting surface portion (contact portion) for arranging the fixed contact 21a. It is possible to improve the workability, and it is possible to reduce the assemblability and the cost of jigs and tools.

  2B shows the arrangement of the guide portions 30a. However, in the case where there are a plurality of guide portions 30b and the guide portions 30b are arranged at predetermined angles with the axis of the movable contact 23 as the center, On the other hand, the tolerance of the assembly angle of the movable contact 23 can be improved. For example, the opening shape of the contact storage chamber 32 shown in FIG. 2 is substantially rectangular, and when the guide portions 30a are arranged at the four corners, the movable contact 23 is also substantially rectangular and the fitting portion 30b is the guide portion 30a. Therefore, the movable contact 23 can be rotated by 180 ° about the axis of the movable contact 23 and fitted to the guide portion 30a to perform assembly work, and positioning of the movable contact 23 during assembly is easy. It becomes.

Embodiment 2. FIG.
FIG. 3 is an inner surface diagram and a movable contact diagram of the cap 30 of the electromagnetic relay according to the second embodiment of the present invention. In the first embodiment described above, the guide portion 30a is formed in a shape that is recessed toward the left side or the right side in FIG. 2C. However, in this second embodiment, as shown in FIG. The guide part 40a provided in 30 is characterized by being arranged radially at predetermined angles (90 °) with the axis of the movable contact 24 as the center.

  As shown in FIG. 3, the four convex fitting portions 40b of the movable contact 24 having a substantially square planar shape are also arranged radially about the axis of the movable contact 24. The fitting portion 40b and the fitting portion The same number of concave guide portions 40a are formed in the contact housing chamber 42 of the cap 30 corresponding to 40b. Similarly to the guide portion 30a of the first embodiment, the guide portion 40a formed in this manner is provided so as to extend from the opening end portion of the cap 30 to the contact accommodating chamber 42, and the movable contact 24 is inserted into the cap 30. In this case, any one of the convex fitting portions 40b of the four movable contacts 24 can be inserted into any one of the concave guide portions 30 of the four caps 30.

Since the second embodiment of the present invention has the above-described configuration, when the movable contact 24 is inserted into the cap 30, there is a position where the movable contact 24 can be inserted every 90 ° of insertion angle. Assembling is possible without concern, and further improvement in assembling workability can be achieved, and it is possible to reduce assembling deterioration and costs due to jigs and tools.
In the second embodiment, the combination of the four guide portions 40a and the fitting portions 40b is exemplified. However, the planar shape of the movable contact is determined by a repeated pattern for each predetermined angle such as a substantially regular polygon. Needless to say, it is possible to form the formed shape, and to form the guide portion and the fitting portion as n sets of concave and convex portions to have an insertion angle (360 / n) °.

Embodiment 3 FIG.
In the above-described first embodiment, it is shown that the movable contact 23 can be inserted into the cap 30 even if the movable contact 23 is rotated by 180 ° about the axis. In the second embodiment, the movable contact 24 with respect to the cap 30 is shown. Is inserted at an insertion angle (360 / n) °, and the guide portion and the fitting portion corresponding thereto are provided for each predetermined angle.
In the third embodiment, as shown in FIG. 4, the insertion angle of the movable contact 25 with respect to the cap 30 is determined at a predetermined angle, and the guide portion 50 a provided on the cap 30 has a predetermined movable contact. The case where 25 fitting parts 50b are inserted is shown.

FIG. 4 is a diagram showing the inner surface of the electromagnetic relay and the movable contact in the third embodiment of the present invention. In FIG. 4, one or more convex fitting portions 50 b of the substantially rectangular movable contact 25 and the same number of concave guide portions at positions corresponding to the arrangement of the fitting portions 50 b in the contact storage chamber 52 of the cap 30. 50a is provided. In the example of FIG. 4, the movable contact 25 has a substantially rectangular shape, and convex fitting portions 50 b that protrude outward (cap side) are provided at three of the four corners. 50a also corresponds to the arrangement. Therefore, in the guide portion 50a of the cap 30, when the movable contact 25 is inserted into the cap 30, the guide portion 50a and the fitting portion 50b can be inserted in only one direction (insertion angle). .
Since Embodiment 3 of the present invention has the above-described configuration, the movable contact 25 is provided with a shape in consideration of contact contactability, and when it is desired to distinguish the front and back by sagging / returning at the time of processing, It becomes possible to prevent erroneous insertion.

Embodiment 4 FIG.
In the above-described first to third embodiments, the guide portion of the cap 30 is a concave groove portion formed from the inner side surface of the cap toward the outer side surface, and is a protrusion-shaped fitting portion having a convex shape on the movable contact side. A combination example provided with the above is described.
In the fourth embodiment, as shown in FIG. 5, the guide portion 60 a provided in the cap 30 is configured by a protruding portion that protrudes from the inner surface of the cap 30 toward the inner side of the contact storage chamber 62. The In order to fit the convex shaped guide part 60a, the movable contact 26 accommodated in the contact accommodating chamber 62 is formed in a concave shape corresponding to the convex shaped guide part 60a and extends from the periphery of the movable contact 26 to the inside. The fitting part 60b which consists of a concave groove part which is dented is provided.
In this way, the guide portion 60a provided on the cap 30 side is formed as a convex protrusion, and the fitting portion 60b provided on the movable contact 26 side is formed as a concave groove portion, which is fitted during assembly. It is also possible to do this.

Embodiment 5 FIG.
In the electromagnetic relay shown in FIG. 1 of the first embodiment described above, when the movable contact 23 is normally closed by the reaction force of the contact spring 22 and a voltage is applied to the excitation coil 11 by a power source (not shown), It was a normally closed contact type electromagnetic relay in which the plunger 14 was attracted to the contact side magnetic core 13 side by electromagnetic force, and the movable contact 23 was separated from the fixed contact 21a by the contact separating non-conductive member 17.
However, in the electromagnetic relay shown in FIG. 6 according to the fifth embodiment, the contact-separating non-conductive member in which the plunger 14 that is normally pressed by the reaction force of the return spring 18 is provided integrally with the plunger 14. When the movable contact 23 is pressed and opened by 17 and a voltage is applied to the exciting coil 11 by a power source (not shown), the plunger 14 is attracted to the magnetic core 15 side by electromagnetic force, and the movable contact 23 becomes opposite to the contact spring 22. It is a normally open contact type electromagnetic relay that is closed by force. As shown in FIG. 6, at a normal time, a predetermined interval is provided as a contact separation portion between the fixed contact 21 a and the movable contact 23.
Even in the case of a normally open contact type electromagnetic relay, the movable contact 23 can be easily accommodated in the contact accommodating chamber 32 by applying any of the configurations of the first to fourth embodiments of the present invention. As a result, the assembly workability can be improved, and it is possible to reduce the assembly workability and the cost of jigs and tools.

DESCRIPTION OF SYMBOLS 10 Case 11 Excitation coil 12 Bobbin 13 Contact side magnetic core 14 Plunger 15 Magnetic core 16 Packing 17 Non-conductive member for contact separation 18 Return spring 19 Non-conductive member 19a Non-conductive member insertion part 21 Main terminal 21a Fixed contact 22 Contact Spring 23, 24, 25, 26 Movable contact 30 Cap 30a, 40a, 50a, 60a Guide portion 30b, 40b, 50b, 60b Fitting portion 31 Opening portion 32, 42, 52, 62 Contact storage chamber 32a Movable contact movable range 32b Contact spring arrangement part 33 Main terminal insertion part.

Claims (8)

An electromagnetic relay that opens and closes a fixed contact by driving a movable contact,
The fixed contact is arranged on a fixed contact mounting surface portion for arranging the fixed contact in an opening opened to a predetermined dimension from the opening end of the cap,
The movable contact is slidably disposed from the fixed contact placement surface portion of the cap into a contact storage chamber opened deeper,
The pair of fixed contacts are arranged symmetrically around the movable contact whose planar shape is a substantially square shape,
On the inner side surface of the cap that houses the movable contact, a guide portion for fitting a part of the movable contact when the movable contact is assembled is different from the side of the movable contact that is close to the fixed contact. An electromagnetic relay provided on two sides so as to extend from an opening end of the cap to a contact storage chamber for storing the movable contact along a driving direction of the movable contact.   The electromagnetic relay according to claim 1, wherein the guide portion is configured by a concave groove portion formed from an inner surface to an outer surface of the cap. 2. The electromagnetic relay according to claim 1, wherein the guide portion is configured by a protruding portion protruding from an inner side surface of the cap toward the inside of the contact housing chamber.   The movable contact is formed in a substantially flat plate shape that extends perpendicularly to the driving direction, and a fitting portion having a shape corresponding to the guide portion is provided around the movable contact. The electromagnetic relay according to any one of 3.   5. The electromagnetic relay according to claim 1, wherein the guide portion is disposed at predetermined angles with the axis of the movable contact as a center.   6. The electromagnetic relay according to claim 5, wherein the predetermined angle is 90 degrees.   The electromagnetic relay according to claim 4, wherein the predetermined fitting portion of the movable contact is assembled to the guide portion of the cap.   The electromagnetic relay according to any one of claims 1 to 7, wherein the guide portions are arranged radially about the axis of the movable contact.

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