JP2001291612A - Solenoid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solenoid which can be easily assembled, without having to use jigs and with few assembly man-hours. SOLUTION: A stationary core 7 is inserted into a bobbin wound with an exciting coil 6. When the engaged parts 2c and 7c are aligned with each other, the stationary core 7 is inserted into the bobbin 2 integrally, without making it protrude from the bobbin 2. An engaging projection 8c and a mounting member 3 are inserted into the engaged parts 2c and 7c and the guide groove 8g of a yoke 8 respectively, and the bobbin 2 is made to slide. When the bobbin 2 reaches a prescribed position, engaging claris 3a and 3b are engaged with engaging parts 8a and 8b, engaging claris 2d and 2e are engaged with engaging parts 8d and 8e to fix the bobbin 2 to the yoke 8 together with the stationary core 7, and the bobbin 2 hardly falls off from the yoke 8. The core 7 is pressed by the engaging projection 8c and a supporting plate 10b, so that it will not fall off from the bobbin 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small solenoid suitable as an actuator for a camera, for example.
More specifically, the present invention relates to a low-cost solenoid that can be easily assembled.

[0002]

2. Description of the Related Art A conventional solenoid comprises an exciting coil, a bobbin, a fixed iron core, a yoke, a spacer, and a movable iron core. On one end side of the bobbin, a convex portion for positioning with the yoke is formed along the opening of the guide hole in which the movable core moves. The fixed iron core has a cylindrical shape including a large diameter portion having substantially the same diameter as the guide hole and a small diameter portion engaged with a second engagement hole of a yoke described later. The yoke has a substantially U-shape, and two opposing support plates are formed with a first engagement hole that engages with the projection of the bobbin and a second engagement hole that engages with the small diameter portion of the fixed iron core. Have been. The spacer has substantially the same thickness as the height of the bobbin projection, and is formed with an engagement hole having substantially the same diameter as the small diameter portion of the fixed iron core.

In order to assemble this solenoid, first, a bobbin around which an exciting coil is wound is attached to a two-sided yoke.
One end of the bobbin is positioned by inserting the protrusion formed on the bobbin into the first engagement hole of the yoke. Next, after inserting a spacer between the bobbin and the support plate in which the second engagement hole of the yoke is formed, the fixed core is inserted through the guide hole on the first engagement hole side of the yoke, and the small-diameter portion is inserted into the second engagement hole. Insert into the engagement hole. Then, the tip of the small-diameter portion of the fixed iron core protruding outside the second engagement hole is caulked and fixed. Finally, the movable iron core is inserted into the guide hole to complete the assembly of the solenoid.

[0004]

However, the above-described solenoid does not have a structure that allows positioning between components, except that a positioning projection is provided at one end of the bobbin. For this reason, in the assembling process, an assembly jig for positioning components and the like is required, and a caulking jig for fixing the distal end portion of the fixed iron core to the yoke is required. In addition, there are many man-hours for setting parts to be assembled on an assembly jig and removing the assembled parts from the assembly jig, which causes a problem that the assembly time is long.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is an object of the present invention to provide a solenoid which can be easily assembled without using an assembling jig in an assembling process, and has a small number of assembling steps and a short assembling time. The purpose is to provide.

[0006]

In order to achieve the above-mentioned object, a solenoid according to the present invention is provided with an exciting coil wound around a guide hole for moving a movable core in an axial direction, and mounting members fixed to both ends. A bobbin, a fixed iron core disposed at one end of the guide hole and generating an attractive force by energizing the excitation coil, and a pair of support plates integrally provided, and these support plates straddle the mounting member of the bobbin. In the solenoid consisting of a yoke assembled as follows,
The bobbin mounting member and the support plate of the yoke are provided with locking claws that engage with each other when the yoke is mounted on the bobbin from the side thereof.

[0007] Further, a pedestal in which the length of insertion into the guide hole is limited at the base side of the fixed core and a pedestal having an engaged portion formed on the rear end surface is provided. When this fixed core is inserted into the guide hole of the bobbin. The engaged part is aligned with the engaged part formed on the mounting member on the rear end side of the bobbin, and the engaging part formed on the support plate on the rear end side of the bobbin by mounting the yoke has the pedestal of the fixed iron core and the bobbin. A series of engagement with the engaged portion of the mounting member.

Further, a connecting pin having one end connected to the exciting coil and the other end protruding from the mounting member is embedded in the mounting member on the rear end side of the bobbin.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A solenoid according to the present invention comprises an exciting coil 6, a bobbin 2, a fixed core 7, a yoke 8, and a movable core 9, as shown in FIG. The yoke 8 is provided with two opposing support plates 10a and 10b that support a bobbin 2 described later in a substantially U-shape. Locking portions 8a, 8b engaging with locking claws 3a, 3b provided on the mounting member 3 of the bobbin 2 are provided on one support plate 10a.
Is formed, and the other support plate 1 is formed.
0b, a locking claw 2d provided on the rear end side of the bobbin 2;
Locking portions 8d and 8e that engage with 2e, and engaging portions 8c that engage with the engaged portion 2c of the bobbin 2 and the engaged portion 7c of the fixed iron core 7 are formed.

An exciting coil 6 is wound around the bobbin 2, and the winding is connected to connection pins 5 a and 5 b embedded at the rear end of the bobbin 2. At the opposite end, a mounting member 3 inserted into a guide groove 8g formed in the support plate 10a of the yoke 8 has a guide hole 2b.
Locking claws 3a and 3b are provided on the sliding surface of the yoke 8 to lock the bobbin 2 by engaging with the locking portions 8a and 8b at predetermined positions of the yoke 8.

As shown in FIG. 2, at the rear end side of the bobbin 2, a storage portion 2a in which the fixed iron core 7 can be integrally stored without protruding, and an engagement provided on a support plate 10b of the yoke 8. The engaging portion 2c into which the portion 8c is inserted, the engaging claws 2d and 2e which engage the engaging portions 8d and 8e at predetermined positions of the yoke 8 to lock the bobbin 2, and the side surface 8f of the yoke 8 A locking projection 4 is formed to prevent the bobbin 2 from being pushed more than necessary into the yoke 8 in contact therewith.

The fixed iron core 7 has a receiving metal 7b inserted into the guide hole 2b and sucking the movable iron core 9 to abut the movable iron core 9 and a diameter of the guide hole 2 so as not to drop off toward the other end of the guide hole 2b. A pedestal 7 arranged largely outside the guide hole 2
a are formed. The pedestal 7a is formed with an engaged portion 7c which is an engaged portion that is aligned in series with the engaged portion 2c of the bobbin 2 when stored in the storage portion 2a of the bobbin 2. Here, the storage portion 2a and the pedestal 7a are
c and 7c are formed in a shape to be housed integrally when they come to a position where they are aligned in series, so that the engaged portions 2c,
When the positions 7c are not aligned in a series, the fixed iron core 7 remains in a state of protruding from the bobbin 2.

Next, a method of assembling the above structure will be described. First, the exciting coil 6 is wound, and the winding inserts the fixed iron core 7 into the bobbin 2 connected to the connection pins 5a, 5b. Guide hole 2 is used for receiving metal 7b of fixed iron core 7.
b, when the engaged portions 2c and 7c are in a position where they are aligned in series, the fixed iron core 7 is housed integrally without protruding from the bobbin 2. Then, the engaging portion 8c of the yoke 8 is fitted to the engaged portions 2c, 7c of the bobbin 2 and the fixed iron core 7, and the mounting member 3 of the bobbin 2 is connected to the guide groove 8g of the yoke 8.
And the bobbin 2 is slid.

When the bobbin 2 is slid to a position where the end of the mounting member 3 and the end of the guide groove 8g come into contact, the locking claws 3a, 3b engage with the locking portions 8a, 8b. Also,
When the bobbin 2 is slid to a position where the locking projection 4 on the rear end side of the bobbin 2 and the side surface 8f of the yoke 8 abut, the locking claw 2
d and 2e engage with the locking portions 8d and 8e. Thus, the bobbin 2 is fixed to the yoke 8 together with the fixed iron core 7, so that the bobbin 2 does not come off the yoke 8 even when pressed in the direction opposite to the insertion direction. And since the fixed iron core 7 is also pressed by the engaging portion 8c and the support plate 10b,
There is no escape from bobbin 2. Finally, the guide hole 2b
When the movable iron core 9 is inserted into the solenoid 1, the assembly of the solenoid 1 shown in FIG. 3 is completed.

[0015]

As described above, according to the solenoid of the present invention, the positioning of each component is easy and no assembly jig is required, so that the product can be assembled in a short time.
This can also contribute to a reduction in manufacturing cost. In addition, there is no protrusion outside the product, which saves space.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a solenoid embodying the present invention.

FIG. 2 is an exploded perspective view of the back side of the bobbin and fixed iron core shown in FIG.

FIG. 3 is a perspective view of a solenoid of the present invention.

[Explanation of symbols]

 Reference Signs List 1 solenoid 2 bobbin 6 excitation coil 7 fixed iron core 8 yoke 9 movable iron core

Claims (3)

[Claims] 1. A bobbin having a guide hole for moving a movable core in the axial direction formed by winding an exciting coil and having mounting members fixed to both ends, and a bobbin disposed at one end of the guide hole for connecting to the exciting coil. In a solenoid comprising a fixed iron core that generates a suction force by energization, and a yoke in which a pair of support plates are provided integrally and these support plates are assembled so as to straddle the mounting member, the mounting member and the support plate And a locking claw that engages with the bobbin when the yoke is mounted from the side thereof. 2. A pedestal in which a length of insertion into a guide hole is limited at a root side of the fixed core and a pedestal having an engaged portion formed on a rear end face is provided, and when the fixed core is inserted into a guide hole of a bobbin. The engaged portion is aligned with the engaged portion formed on the mounting member on the rear end side of the bobbin, and the engaging portion formed on the support plate on the rear end side by mounting the yoke is provided on the pedestal and the mounting member. The solenoid according to claim 1, wherein the solenoid is engaged with the engagement portion in a series. 3. The solenoid according to claim 1, wherein a connection pin having one end connected to the excitation coil and the other end protruding from the mounting member is embedded in the mounting member on the rear end side. .