JPH0119303Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electromagnetic switch, and more particularly to a structure for leading out a connection terminal of an electromagnetic solenoid housed within the electromagnetic switch.

An electromagnetic switch is connected to a starter motor circuit of a vehicle, and when the starter switch is turned on, the electromagnetic switch is closed, thereby closing the motor circuit. By the way, in vehicles, particularly motorcycles, various electrical components are often mounted exposed due to their structure, so waterproofing measures are necessary. Particularly in the case of a switch through which a large current flows, such as the electromagnetic switch mentioned above, it is important to completely waterproof the inside of the switch.

The present invention was developed in view of the above points, and the purpose is to make the inside of the electromagnetic switch completely waterproof. a movable contact member driven by the cooperation of the electromagnetic solenoid, a fixed contact member mounted on the case, a connection terminal to which each connection end of the electromagnetic solenoid is connected, and a plunger and spring housed in the bobbin. a yoke interposed between one end of the bobbin and the cover to form a magnetic circuit between the electromagnetic solenoid and the case, and between a peripheral edge of the yoke and an opposing end of the cover. An electromagnetic switch is provided with an O-ring that is interposed between the case, the yoke, and the cover, and seals each abutting portion between the case, the yoke, and the cover. A notch is formed up to the position, and each connection end of the electromagnetic solenoid is led out to the one end side of the bobbin through the notch, and a hole is bored at a position inside the O-ring of the yoke, and each connection end of the electromagnetic solenoid is led out to the one end side of the bobbin. the O by guiding the end through the hole to the connection terminal.
The present invention provides a structure of a connecting terminal for an electromagnetic switch that improves the sealing performance within the electromagnetic switch by a ring.

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

Fig. 1 is a top view of an electromagnetic switch to which the present invention is applied, and Fig. 2 is a sectional view taken along the arrow line - in Fig. 1. It is comprised of an electromagnetic solenoid 6, a plunger 7, a yoke 9, an O-ring 10, etc., which are housed in a cover 3 made of an insulating material and which is fitted with various contact members to be described later, and a case 2. As shown in FIGS. 2 and 3, the electromagnetic solenoid 6 is composed of a bobbin 5 and a coil 4 wound around the bobbin 5, and a plunger 7 is provided in the hole 5a of the bobbin 5. A coil spring 8 that also applies an outward biasing force
is stored.

The end surface 5b of the bobbin 5 is sized to fit into the case 2, and a flange 5c for guiding the plunger 7 is provided to protrude in the axial direction from the open end of the hole 5a of the one end 5b. As detailed in FIG. 4, the one end 5b of the bobbin 5 is provided with an arcuate lead-out portion 5d protruding from the peripheral edge, located inside the width of the O-ring 10 and concentric with the hole 5a. A notch 5e that opens to the outer peripheral end is formed approximately at the center of the outer wall of the lead-out portion 5d and at the peripheral edge of one end 5b. Two arcuate grooves 5f and 5g are formed along the circumferential direction in the center of the lead-out portion 5d, and these grooves 5
f, 5g are defined by a partition wall 5h provided in the radial direction approximately at the center of the inner wall, and further, this partition wall 5h connects the notch 5e of the outer wall of the lead-out portion 5d to two passages 5.
i,5k.

Approximately U is formed at both ends of the end surface 5d' of the lead-out portion 5d when viewed from above.
Letter-shaped guide portions 5m and 5m' are provided in a protruding manner.
A notch 5p extending from the open end of the groove 5n to the closed end is provided at a lower position on the side wall of the guide portion 5m. The notch 5p and the groove 5n are set to have dimensions slightly larger than the wire diameter of the electromagnetic solenoid 6. The guide portion 5m' is also formed similarly to the guide portion 5m. The bobbin 5 having such a shape is integrally formed of a heat-resistant insulating member, such as a heat-resistant resin member.

As shown in FIG. 4, the connecting ends 6a and 6b of the electromagnetic solenoid 6 wound around the bobbin 5 are connected to the grooves 5f and 6b through the notches 5e in the end surface 5b of the bobbin 5 and the passages 5i and 5k in the lead-out portion 5d, respectively. 5g, and further introduced into the grooves 5n, 5n' through the notches 5p, 5p' of the guide parts 5m, 5m', and led out to the end surface 5b side of the bobbin 5 and in the axial direction of the bobbin 5. . At these notches 5p and 5p', each connection end 6
a and 6b are locked, and the terminal processing described below can be easily performed.

As shown in FIG. 3, the yoke 9 has the same diameter as one end 5b of the bobbin 5, and has a flange 5 of the bobbin 5 in the center.
A hole 9a is formed into which the wire 5d of the bobbin 5 is inserted, and a hole 9b into which the lead-out portion 5d of the bobbin 5 is inserted is further formed at a position facing the lead-out portion 5d of the bobbin 5. This yoke 9
As shown in FIG. 2, the outer circumferential surface of the magnet contacts the inner circumferential surface of the case 2, and the case 2, the electromagnetic solenoid 6, and the yoke 9 form a magnetic circuit.

A cover 3 is fitted and bonded to the open end of the case 2, and is firmly fixed, for example, by caulking.
Inclined outer peripheral surface 3 of the end face inside the case 2 of the cover 3
An O-ring 10 having the same diameter as the yoke 9 is interposed between the yoke 9 and the opposing end surface 9c. This O-ring 10 liquid-tightly seals the contact portions between the inner peripheral surface of the case 2, the peripheral surface 3e of the cover 3, and the peripheral edge of the end surface 9c of the yoke 9 over the entire circumference. Hole 9b of yoke 9 through which the lead-out portion 5d of bobbin 5 is inserted
is located inside the O-ring 10, so each connection end 6a, 6b of the electromagnetic solenoid 6 is connected to the cover 3.
and the yoke 9.

The cover 3 has 2 parts as shown in Figures 1 and 2.
two fixed contact members 11, 14, connection terminals 20, 2
1, 22, fuse 24, etc. are provided.
The fixed contact member 11 has one end portion 11a forming a contact portion located inside the cover 3, a shaft portion 11b inserted through a hole 3a drilled in the cover 3, and the other end portion 11c having a screw carved therein located inside the cover 3. protruding from the outside. The washer 12 is connected to the fixed contact member 1 via an O-ring 13.
The fixed contact member 11 is press-fitted into the shaft portion 11b of the cover 3 from the outside, thereby fixing the fixed contact member 11 to the cover 3 in a fluid-tight manner. Similar to the fixed contact member 11, the other fixed contact member 14 is also fluid-tightly fixed to the cover 3 by a washer 15 and an O-ring (not shown).

The movable contact member 16 is arranged within a space 3b formed between the contact portions 11a and 14a of the two fixed contact members 11 and 14 in the cover 3, and is substantially aligned with the axis of the plunger 7 within the space 3b. It is loosely fitted into a protruding guide and is disposed via a coil spring 17, its bottom end surface abuts one end surface of the plunger 7, and its flange-shaped open end abuts the inner surface of the cover 3. When the electromagnetic solenoid 6 is deenergized, the movable contact member 16 is pressed by the plunger 7 as shown in the figure, and the open end is separated from each contact portion 11a, 14a, and the electromagnetic switch 1 is opened. When the plunger 7 is energized and attracted into the bobbin 5, it is pressed by the coil spring 17, and the open end is brought into pressure contact with each of the contact portions 11a and 14a, and the bottom end surface is separated from the end surface of the plunger 7, so that the electromagnetic Switch 1 is closed.

A fifth groove is provided in the cover 3 at a position facing the groove 5n of the guide 5m formed in the lead-out portion 5d of the bobbin 5.
As shown in the figure, a small hole 3d is drilled, and this hole 3d
An eyelet 18 made of a conductor is fitted inside. The eyelet 18 is the fixed end 20 of the connection terminal 20
A is inserted into the hole 20b, and its head 18a is pressed against the fixed end 20a, and the end 18b is attached to the O-ring 19.
It is expanded through the cover 3 and is substantially flush with the inner surface of the cover 3. The O-ring 19 seals the space between the open end of the hole 3d of the cover 3 and the end 18b of the eyelet 18. The inner surface of the cover 3 and the end surface of the guide portion 5m of the bobbin 5 face each other with a slight gap.

The connecting end 6a of the electromagnetic solenoid 6 led out from the groove 5n of the guide part 5m passes through the inside of the eyelet 18 and is led out of the cover 3, and is attached to the fixed end 20a of the connecting terminal 20 together with the head 18a of the eyelet 18. It is fixed by solder 30. Similarly to the connection terminal 20, the connection terminal 21 is mounted at a position aligned with the locking portion 5m' of the bobbin 5, and is connected to the connection end 6b of the electromagnetic solenoid 6 by soldering.

Furthermore, as shown in FIGS. 1, 2, and 5, the fixed end portion 22a of the connecting terminal 22 is fixed to the upper surface 3c of the cover 3 by a locking portion 3f protruding from the cover 3. A fuse 24 is fixed to the side portion 3s of 3 with bolts 25 and 26. still,
As shown in FIG. 2, the bolt 25 is connected to the fuse 24 via spring washers 27, washers 28, etc.
Screw one end of the cover 3 onto the cover 3. The other end of the fuse 24 is screwed into the cover 3 with the bolt 26 in the same manner as the bolt 25. One end 2 of the fixed end of the connection terminal 22
2b is connected to one end of the fuse 24 by a bolt 25. One end of the conduction plate 23 is connected to the fixed contact member 11
The other end is connected to the other end of the fuse 24 via a bolt 26.

Furthermore, on the top surface 3c of the cover 3,
As shown in the figure, the connector guides 3g, 3 are approximately L-shaped in top view at the four corners surrounding the connection terminals 20, 21, 22.
h, 3i and 3k are integrally provided in a protruding manner.

The assembly of the electromagnetic switch 1 having the above structure will be explained below. For convenience of explanation, it is assumed that the fixed contact members 11, 14, the movable contact member 16, each of the connection terminals 20, 21, 22, the fuse 24, the conductive plate 23, etc. are already attached to the cover 3.

As shown in FIG. 4, each connection end 6a, 6b of the electromagnetic solenoid 6 wound around the bobbin 5 is
Notch 5e of one end 5b and groove 5 of lead-out portion 5d
It is introduced into the grooves 5f, 5g through the grooves 5f, 5g through the guides 5m, 5m', and the grooves 5n, 5n through the grooves 5p, 5p' of the guides 5m, 5m'.
5n′. Next, as shown in FIGS. 2 and 3, the flange 5c and lead-out portion 5d of the bobbin 5 are fitted into the holes 9a and 9b of the yoke 9, and the end surface 9d of the yoke 9 is brought into contact with one end 5b of the bobbin 5. let me touch you,
These bobbin 5 and yoke 9 are integrated into case 2.
Insert it inside. The coil spring 8 for return and the plunger 7 are housed in the hole 5a of the bobbin 5, and
An O-ring 10 is placed on the end surface 9c of the yoke 9. In this state, the O-ring 10 is in contact with the inner peripheral surface of the case 2 and is located outside the hole 9b of the yoke 9.

After attaching the cover 3 and inserting each of the connection ends 6a and 6b of the electromagnetic solenoid 6 into the respective eyelets to which the connection terminals 20 and 21 are attached at one end, the open end of the cover 3 is fitted into the open end of the case 2. Insert it and secure it firmly by caulking as mentioned above. Next, each connecting end 6a, 6b of the electromagnetic solenoid 6 is fixed to each connecting terminal 20, 21 together with the eyelet by soldering to perform terminal processing. When performing this terminal processing, as described above, each connection end 6a, 6b is locked by each notch 5p, 5p' of each guide 5m, 5m', so each part of the electromagnetic solenoid 6 at the beginning and end of winding is No unreasonable force is applied to the terminal, and the terminal processing becomes extremely easy. This seals the head opening end of the eyelet. It is assumed that the fixed contact members 11 and 14, the movable contact member 16, the connection terminal 22, the fuse 24, the conductive plate 23, etc. are already attached to the cover 3.

In this way, the contact surfaces of the outer peripheral surface 3e of the open end of the cover 3, the end surface 9c of the yoke 9, and the inner peripheral surface of the case 2 in the case 2 are completely sealed around the entire circumference by the O-ring 10, and Connection terminals 20, 21
The corresponding eyelets and the connecting ends 6a and 6b of the electromagnetic solenoid 6 are sealed with solder as described above. Therefore, the inside of the case 2 is completely sealed. Further, each connection end 6a, 6b of the electromagnetic coil 6 is
are isolated and insulated, and also completely insulated from the yoke 9 over the entire circumference by the peripheral wall of the lead-out portion 5d.

Then, for example, connect the end 11c of the fixed contact member 11 of the electromagnetic switch 1 to the battery, the end 14c of the fixed contact member 14 to the starter motor, and one end of the fuse 24 to the main switch via the bolt 25. Couplers are attached to the terminals 20, 21, and 22, and the connecting terminal 20 is connected to the load side of the main switch 41, the connecting terminal 21 is connected to the starter switch, and the connecting terminal 22 is connected to the alternator via a rectifier (none of them are shown). to form an electric circuit.

As explained above, according to the present invention, there is provided an electromagnetic solenoid housed in a case and wound around a bobbin, a connection terminal attached to the case and connected to each connection end of the fixed contact member and the electromagnetic solenoid, and the a cover having a movable contact member driven by cooperation between a plunger housed in a bobbin and a spring; and a magnetic circuit interposed between one end of the bobbin and the cover and between the electromagnetic solenoid and the case. and an O-ring that is interposed between a peripheral edge of the yoke and an opposing end of the cover and seals each contact portion between the case, the yoke, and the cover. A notch is formed in one end of the bobbin that contacts the yoke from the peripheral edge of the one end to a position inside the O-ring, and each connection end of the electromagnetic solenoid is led out to the one end side of the bobbin through the notch. A hole is formed inside the O-ring of the yoke, and each connection end is guided to the connection terminal through the hole, so that the opening of the cover inside the electromagnetic switch, that is, inside the case. The contact surfaces of the outer peripheral surface of the end, the end surface of the yoke, and the inner peripheral surface of the case are completely sealed all around by the O-ring 10, and each connection end of the electromagnetic solenoid, the electromagnetic solenoid, and the electromagnetic switch is completely sealed. It is possible to seal the connection parts between the and the connection terminals very well, and the waterproofness is improved, and the durability of the electromagnetic switch is significantly improved.

[Brief explanation of the drawing]

Fig. 1 is a top view of an electromagnetic switch to which the present invention is applied, Fig. 2 is a sectional view along the arrow line in Fig. 1, Fig. 3 is an assembled perspective view of the electromagnetic solenoid, yoke, and O-ring shown in Fig. 4 is an enlarged view of the main part of the electromagnetic solenoid shown in FIG. 3, and FIG. 5 is an enlarged view of the main part of the electromagnetic solenoid shown in FIG. 1... Electromagnetic switch, 2... Case, 3... Cover, 5... Bobbin, 6... Electromagnetic solenoid, 7
... Plunger, 8, 17 ... Coil spring, 9...
...Yoke, 10, 13, 19...O ring, 1
DESCRIPTION OF SYMBOLS 1, 14... Fixed contact member, 16... Movable contact member, 18... Eyelet, 20, 21, 22... Connection terminal, 23... Conductive plate, 24... Fuse, 2
5, 26... bolt, 30... solder.

Claims (1)

[Scope of utility model registration request] an electromagnetic solenoid wound around a bobbin housed in a case, a connection terminal attached to the case to which a fixed contact member and each connection end of the electromagnetic solenoid are connected, and a plunger and a spring housed in the bobbin. a yoke interposed between one end of the bobbin and the cover to form a magnetic circuit between the electromagnetic solenoid and the case; and a peripheral edge of the yoke. of the electromagnetic switch, the electromagnetic switch includes an O-ring that is interposed between the end of the bobbin and the opposite end of the cover, and seals each abutting part of the case, the yoke, and the cover. A cutout is formed from the peripheral edge of one end to an inner position of the O-ring, and each connection end of the electromagnetic solenoid is led out to the one end side of the bobbin through the cutout, and a cutout is formed at an inner position of the O-ring of the yoke. 1. A structure of a connecting terminal for an electromagnetic switch, characterized in that a hole is bored in the hole, and each of the connecting ends is led to the connecting terminal through the hole.