JPH0575940U - Electromagnetic switch - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electromagnetic switch whose performance is stabilized by preventing unevenness in the operation timing of each assembled product. [Structure] The bobbin 3 is provided with at least two frame engaging portions 3g for engaging with the bobbin contact portion 5a2 of the solenoid frame 5, and the solenoid frame 5
The bobbin contact portion 5a2 is fixed to the bobbin 3 by being locked to the frame locking portion 3g.
Electromagnetic switch 1 provided with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic switch used for bringing a circuit into a connected state or a disconnected state by contacting or separating a movable contact with a fixed contact by exciting or demagnetizing a solenoid coil.

[0002]

[Prior Art]

 An electromagnetic switch for connecting or disconnecting a circuit by exciting or demagnetizing a solenoid coil is described in Japanese Utility Model Laid-Open No. 61-57447.

In the electromagnetic switch described in the above publication, the bobbin is fixed to the case side with the bobbin placed inside the solenoid frame for forming the magnetic path of the solenoid coil. Was supported inside the solenoid frame.

[0004]

[Conventional problems]

 However, in the above-mentioned electromagnetic switch, the bobbin is supported inside the solenoid frame, and then the solenoid frame is fixed to the case to support the bobbin with the solenoid frame. If the bobbin mounting position is misaligned due to the lack of a means for positioning the plunger, the plunger cannot move at a predetermined position, and each assembled electromagnetic switch may have unstable operation timing. was there.

[0005]

[Problems to be solved by the device]

 The problem to be solved is that if there is no means for positioning the bobbin with respect to the solenoid frame, the bobbin mounting position may shift and the operation timing may become unstable.

[0006]

[Means for Solving the Problems]

 In the electromagnetic switch according to the present invention, in order to prevent the bobbin from being displaced, the bobbin is provided with at least two frame engaging portions for engaging the bobbin abutting portions of the solenoid frame, and the solenoid frame is also provided. The bobbin contacting portion is provided with a bobbin locking portion fixed to the bobbin by being locked to the frame locking portion. In a more preferable embodiment, the frame locking portion is It is characterized in that it is formed in a convex state toward the bobbin abutting portion of the solenoid frame, and the bobbin locking portion is formed in a concave state in the bobbin abutting portion of the solenoid frame. In the embodiment, the frame engaging portion is formed in a concave state on the bobbin, and the bobbin engaging portion is convex toward the bobbin. The bobbin is positioned with respect to the solenoid frame and then fixed to prevent uneven operation timing of each assembled product. , Has achieved the purpose of stabilizing the performance.

[0007]

[Function of the device]

 In the electromagnetic switch according to the present invention, the solenoid frame is positioned and fixed to the bobbin by locking the frame locking portion provided on the bobbin with the bobbin locking portion of the solenoid frame. Therefore, the bobbin mounting position does not shift, and the bobbin forms the plunger moving portion at a preset position, so that there is no unevenness in the performance of the plunger operation timing.

[0008]

【Example】

 1 to 3 show an embodiment of an electromagnetic switch according to the present invention.

The illustrated electromagnetic switch 1 has a case 2 mainly containing a bobbin 3, a solenoid coil 4, a solenoid frame 5, a movable contact 6, and fixed contacts 7, 7.

A coil forming portion 3c is provided between the flange portions 3a and 3b provided on both ends of a bobbin 3 formed of a resin material, and a solenoid formed by winding a copper wire around the coil forming portion 3c. The coil 4 is arranged.

A circular hole-shaped plunger moving portion 3d is formed at the center of the coil forming portion 3c, and a cylindrical plunger 8 made of a magnetic material is housed in the plunger moving portion 3d. A first return spring 9 is locked in the plunger moving portion 3d at the base end side of the plunger 8, and the plunger 8 is moved upward in FIG. 1 by the elastic repulsive force of the first return spring 9. Is being urged towards.

As shown in FIG. 3, the coil terminal 3e for connecting the end of the copper wire of the solenoid coil 4 to the upper surface of the upper flange portion 3a of the flange portions 3a and 3b, 3f is attached, and the coil terminals 3e and 3f are connected to the electromagnetic switch operating wiring (not shown) on the outside of the case 2. A solenoid frame 5 is attached to the outside of the one flange portion 3a and the other flange portion 3b.

Further, as is apparent from FIGS. 1 and 2, the lower surface of the other flange portion 3b on the lower side in FIG. 3 has a round shaft shape from the outer side of the plunger moving portion 3d. Two projecting portions 3g, which are the frame locking portions protruding downward, are provided.

The size of the protrusions 3 g, 3 g protruding from the other flange part 3 b is substantially the same as the thickness of the frame core 5 a included in the solenoid frame 5.

The solenoid frame 5 is composed of a U-shaped frame core 5a, and frame flanges 5b whose end portions are in contact with side walls 5a1 and 5a1 provided on the frame core 5a. The frame cores 5a and 5b are both made of a magnetic material. Is used as the material.

A flat bobbin contact portion 5a2 is formed at the center of the frame core 5a, and the bobbin contact portion 5a2 is provided on the other flange portion 3b of the bobbin 3 near the side walls 5a1 and 5a1. Round-bobbin-shaped bobbin locking holes 5a3 and 5a3, which are frame locking portions, are respectively provided at positions corresponding to the convex portions 3g and 3g provided, and the hole diameter of the bobbin locking hole 5a3 is the convex portion 3g. It is almost the same as the outer diameter.

The side walls 5a1 and 5a1 of the frame core 5a are formed along the length direction of the plunger moving portion 3d. As is clear from FIG. 2, the side walls 5a1 and 5a1 are located at the center of the upper ends of the side walls 5a1 and 5a1. Press-fitting protrusions 5a4, 5a4 are provided which project in a rectangular shape upward in the inside. Protrusions 5a5 and 5a5 are formed on both sides of the press-fitting protrusions 5a4 and 5a4, respectively, and projecting like wedges in a direction substantially perpendicular to the projecting direction of the press-fitting protrusions 5a4 and 5a4.

A round hole-shaped plunger hole 5b1 corresponding to the plunger moving portion 3d is provided at the center of the frame flange 5b, and the frame core 5a is provided at both ends of the frame flange 5b. The cutouts 5b2 and 5b2 for inserting the press-fitting convex portions 5a4 and 5a4 provided in the are provided.

Here, the convex portions 3g, 3g provided on the other flange portion 3b of the bobbin 3 are aligned with the bobbin engaging holes 5a3, 5a3 provided on the bobbin contact portion 5a2 of the frame core 5a. In this state, the frame flange 5b is brought into contact with one of the flange portions 3a of the bobbin 3, and the notches 5b2 and 5b2 of the frame flange 5b are inserted into the press-fitting convex portions 5a4 and 5a4 of the frame core 5a while the frame flange 5b is inserted into the frame. By pressing the core 5a toward the bobbin contact portion 5a2 side, the bobbin 3 and the frame core 5a are positioned at two positions by the convex portions 3g and 3g of the bobbin 3 and the bobbin locking holes 5a3 and 5a3 of the frame core 5a. Since the frame flange 5b is pressed and inserted into the frame core 5a, the frame flange 5b is pressed against the side walls 5a1 and 5a1 of the frame core 5a. The bobbin 3 is covered integrally with the boom core 5a.

On the other hand, as is clear from FIG. 3, the base end side of the slide 10 having a piece shape is in contact with the tip end side of the plunger 8, and the contact holding portion 10 a provided in the center of the slider 10 A movable contact 6 having a disk shape is fixed.

Further, as is apparent from FIG. 1, one end side of the second return spring 11 is locked to the upper side of the contact holding portion 10a of the slider 10, and the other side of the second return spring 11 is locked. The end side is locked by the case 2, and the slider 10 is urged downward in FIG. 1 by the elastic repulsive force of the second return spring 11.

On the other hand, the case 2 is composed of a case body 2a and an under cover 2b that closes the open end of the case body 2a. As is apparent from FIG. 1, the slider 10 is provided at the center of the thick case body 2a. A slider support portion 2a1 having a cylindrical shape for supporting the slider and a spring locking portion 2a2 for locking the other end side of the second return spring 11 are provided. The slider 10 is adapted to move upward and downward in a slider moving portion 2a3 having a round hole provided on the lower side of the locking portion 2a2 in the figure.

Further, the case main body 2a is provided with a fixed contact mounting portion 2a4 having a hole diameter larger than the hole diameter of the slider moving portion 2a3 below the slider moving portion 2a3 in FIG. On the lower side of the fixed contact mounting portion 2a4 corresponding to the movable contact 6, the base ends of the plate-shaped fixed contacts 7, 7 are fixed, and the tip ends of the fixed contacts 7, 7 are separated from the movable contact 6. At the above-mentioned positions, they are projected so as to approach the slider 10 side. The fixed contacts 7, 7 are connected to external connection terminals 12, 12 attached to the case body 2a, and the external connection terminals 12, 12 are connected to a circuit (not shown).

A flat frame abutting portion 2a5 is provided on the lower side of the fixed contact mounting portion 2a4 of the case body 2a in FIG. 1, and the frame abutting portion 2a5 has a frame 5a. The frame flange 5b of is abutted.

Further, as is apparent from FIG. 2, the outer side of the frame contact portion 2a5 is formed as a rectangular concave shape from the edge of the frame contact portion 2a5 toward the upper side in the figure. Press-fitting holes 2a6, 2a6 are provided respectively, and the size of the press-fitting hole 2a6 is slightly smaller than the outer shape of the press-fitting convex portion 5a4.

Further, an undercover 2b is fitted to the end of the side wall 2a7 protruding downward from the outside of the frame contact portion 2a5 of the case body 2a in FIG. 1, and the inside of the side wall 2a7 is fitted. Is the frame insertion portion 2a8.

At the time of assembling the electromagnetic switch 1 having such a structure, the slider 10 having the second return spring 11 mounted thereon is set above the fixed contacts 7, 7 in FIG. The protrusions 3g and 3g provided on the other flange portion 3b of the bobbin 3 in which the spring 9 and the plunger 8 are inserted into the plunger moving portion 3d are the bobbin locking holes provided in the bobbin contact portion 5a2 of the frame core 5a. Match 5a3 and 5a3.

In this state, the frame flange 5b is brought into contact with one flange portion 3a of the bobbin 3 so that the cutouts 5b2, 5b2 of the frame flange 5b are aligned with the press-fitting protrusions 5a4, 5a4 of the frame core 5a. After being inserted into the frame insertion portion 2a8, the press-fitting convex portions 5a4, 5a4 of the frame core 5a are pressed into the press-fitting holes 2a6, 2a6 of the case 2.

By press-fitting the press-fitting protrusions 5a4, 5a4 of the frame core 5a into the press-fitting holes 2a6, 2a6 of the case 2, the protrusions 5a5, 5a5 of the press-fitting protrusions 5a4, 5a4 are inserted into the case 2. As the frame flange 5b abuts the frame abutting portion 2a5 of the case 2 as it bites, the bobbin abutting portion 5a2 of the frame core 5a is pressed to the frame flange 5b side abutting the frame abutting portion 2a5. , The bobbin 3 is pressed and inserted with the convex portions 3g, 3g positioned at two positions with respect to the bobbin locking holes 5a3, 5a3 of the frame core 5a.

The convex portions 3g and 3g of the bobbin 3 are pressed and inserted into the bobbin locking holes 5a3 and 5a3 of the frame core 5a, so that the frame flange 5b is in contact with the side walls 5a1 and 5a1 of the frame core 5a. Then, the frame core 5a and the frame flange 5b are integrally assembled together with the positioned bobbin 3 and fixed to the case 2.

When the electromagnetic switch actuation wiring is connected to the coil terminals 3e and 3f, the external connection terminals 11 and 11 are connected to the circuit, and the electromagnetic switch actuation power is supplied from the coil terminals 3e and 3f, Since the solenoid coil 4 is excited, a magnetic flux is generated which passes through the bottom portion 5a2 of the frame core 5a → the side walls 5a1 and 5a1 of the frame core 5a → the frame flange 5b → the plunger 8 → the bobbin contact portion 5a2 of the frame core 5a. 8 is attracted and moved toward the lower side in FIG. 1 against the elastic repulsive force of the first return spring 9.

When the plunger 8 is sucked and moved downward in FIG. 1, the slider 10 moves downward in FIG. 1 due to the elastic restoring force of the second return spring 11. Since the movable contact 6 is brought into contact with the fixed contacts 7 and 7, and the movable contact 6 contacts the fixed contacts 7 and 7, the circuit connected to the fixed contacts 7 and 7 is brought into conduction from the disconnected state to energize the circuit. State.

When the supply of the electromagnetic switch actuating power is stopped, the solenoid coil 4 is demagnetized, so that no magnetic flux is generated and the plunger 8 is moved by the elastic restoring force of the first return spring 9 in FIG. Move back toward the upper side. When the plunger 8 moves back, the slider 10 also moves back to the upper side in FIG. 1, so that the movable contact 6 is separated from the fixed contacts 7 and 7 to interrupt the circuit.

In an embodiment of the electromagnetic switch according to the present invention, the frame engaging portion 5a3 is formed in a convex state toward the bobbin contacting portion 5a2 of the solenoid frame 5, and the bobbin engaging portion 5a3 is a solenoid. Although the bobbin abutting portion 5a2 of the frame 5 is shown to be formed in a concave state, the frame engaging portion 5a3 and the bobbin engaging portion 5a3 are not limited to those described above, and the frame engaging portion 5a3 may be provided on the bobbin 3. It is needless to say that the present invention can be similarly applied to the case where the bobbin engaging portion 5a3 is formed in a concave state and the bobbin engaging portion 5a3 is formed in a convex state toward the bobbin 3.

[0035]

[Effect of the device]

 As described above, in the electromagnetic switch according to the present invention, the bobbin is provided with at least two frame engaging portions for engaging with the bobbin abutting portion of the solenoid frame, and the bobbin abutting portion of the solenoid frame is provided. Since the bobbin engaging portion fixed to the bobbin by engaging with the frame engaging portion is provided in the portion, the bobbin mounting position is not displaced and the bobbin is Since the plunger moving part is formed at a preset position, the plunger can be moved in a predetermined position, thereby operating the plunger in comparison with one without means for positioning the bobbin with respect to the solenoid frame. There is no unevenness in the timing performance, and it has the excellent effect of stabilizing the performance.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of an electromagnetic switch according to the present invention.

FIG. 2 is a vertical cross-sectional side view showing an assembly relationship between a case and a solenoid frame in the electromagnetic switch shown in FIG.

FIG. 3 is an external perspective explanatory view showing an assembling relationship of respective parts of the electromagnetic switch shown in FIG.

[Explanation of symbols]

 1 electromagnetic switch 3 bobbin 3d plunger moving part 3g frame locking part (convex part) 4 solenoid coil 5 solenoid frame 5a2 bobbin contact part 5a3 bobbin locking part (bobbin locking hole) 6 movable contact 7 fixed contact 8 plunger

Claims (3)

[Scope of utility model registration request] 1. A bobbin having a plunger moving part, a solenoid coil wound around the bobbin and generating a magnetic flux by excitation, a magnetic flux generated by the solenoid coil outside the solenoid coil is passed through the bobbin, and the bobbin contacts the bobbin. A solenoid frame having a bobbin abutting portion in contact therewith, a plunger housed in the plunger moving portion and attracted and moved by the magnetic flux, a movable contact coupled to the plunger and moving integrally with the plunger, the movable contact An electromagnetic switch having a fixed contact that makes the movable contact come into contact with the movable contact from a separated state by providing at least two frame locking portions for locking the bobbin abutting portion of the solenoid frame on the bobbin, and The bobbin abutting part of the solenoid frame has the frame An electromagnetic switch comprising a bobbin locking portion fixed to the bobbin by locking the locking portion. 2. The frame locking portion is formed in a convex state toward the bobbin contact portion of the solenoid frame, and the bobbin locking portion is formed in a concave state in the bobbin contact portion of the solenoid frame. The electromagnetic switch according to claim 1. 3. The electromagnetic switch according to claim 1, wherein the frame locking portion is formed in a concave state on the bobbin, and the bobbin locking portion is formed in a convex state toward the bobbin.