JPH0652107U - Small electromagnet device - Google Patents

Abstract

(57) [Summary] (Modified) [Objective] To provide a small electromagnet device which is easy to assemble, has a good yield, and has stable characteristics. A fixed yoke a, a coupling hole 1a or a pawl coupling hole, a movable yoke insertion port 2a, a movable yoke b, a permanent magnet c, a suction yoke d, a convex portion 1f or a pawl, and a coil g. A small electromagnet device comprising a and a coupling hole 1
The bobbin-yoke coupling structure of the small electromagnet device is completed by lockingly mounting the a or the pawl coupling hole and the convex portion 1f or the pawl.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bobbin-yoke coupling structure of a small electromagnet device used as a part of a camera, a portable electric appliance or the like.

[0002]

[Prior art]

 Conventionally, this type of small electromagnet device includes a fixed yoke a, a movable yoke b, a permanent magnet c, a suction yoke d, a terminal e, a bobbin f, a coil g, and a caulking portion h. In most cases, either the bobbin f is fixed to the fixed yoke a by adhesion or press fitting, or the fixed yoke a is caulked. The former is due to the displacement of the bonding position, the bobbin is damaged during press fitting, and the latter is due to caulking. There were drawbacks such as bobbin damage and coil breakage, which could easily lead to poor yield.

[0003]

[Problems to be solved by the device]

 In order to eliminate these drawbacks, the present invention provides a resin bobbin with a convex portion and a fixed yoke with a coupling hole for locking the convex portion so that they can be coupled by the elasticity of the resin. Since the bobbin can be fixed to the set position without applying force, it is an object of the present invention to provide a small-sized electromagnet device which has a good yield and is easy to assemble and has stable characteristics.

[0004]

[Means for Solving the Problems]

 The present invention is a small electromagnet device in which a resin bobbin is attached to a fixed yoke formed in a substantially U shape, and convex portions are provided at both ends of the bobbin, and a fixing hole for coupling with the convex portion is provided in the fixed yoke. The small electromagnet device according to claim 1, wherein the convex portion serves as a pawl, and the hole for coupling with the pawl serves as a pawl coupling hole.

[0005]

[Action]

 According to the present invention, a resin bobbin is provided with a convex portion and a fixed yoke with a coupling hole for coupling with the convex portion. The bobbin can be fixed.

[0006]

【Example】

 The configuration of the present invention will be described with reference to FIG. The small electromagnet device of the present invention includes a fixed yoke a, a coupling hole 1a, a movable yoke insertion opening 2a, a movable yoke b, a permanent magnet c, a suction yoke d, a terminal e, a bobbin f, and The protrusions 1f formed on both ends of the bobbin f having the protrusion 1f and the coil g and having the coil g arranged in the coupling hole 1a of the fixed yoke a are inserted so as to be fitted to each other. When the formed convex portion 1f is coupled to the coupling hole 1a, the fixed yoke a and the bobbin f are fixed as shown in FIG. Further, a suction yoke d and a permanent magnet c are attached to the bobbin f, the foot portion of the movable yoke b is passed through the bobbin inner diameter portion from the movable yoke insertion opening 2a of the fixed yoke, and the end portion is attached to the suction yoke d. The small electromagnet device of the present invention is completed by adsorbing.

Regarding FIG. 2, the above-mentioned convex portion 1f is used as a pawl 2f, and the coupling hole of the fixed yoke that is coupled to the convex portion 1f is changed to a pawl coupling hole. Is. That is, the pawls 2f formed at both ends of the bobbin f, in which the coil g is arranged, are inserted into the pawl coupling holes 1A of the fixed yoke a so as to be fitted. When the formed pawl 2f is connected to the pawl connecting hole 1A, the fixed yoke a and the bobbin f are fixed as shown in FIG. Further, the adsorption yoke d and the permanent magnet c are attached to the bobbin f, the foot portion of the movable yoke b is passed through the bobbin inner diameter portion from the movable yoke insertion opening 2a of the fixed yoke a, and the end portion is attached to the adsorption yoke d. By adsorbing, the connecting structure of the bobbin and the yoke of the small electromagnet device of the present invention is completed. With the above-mentioned configuration, since there is no need for adhesion, press-fitting, caulking, etc. as in the conventional case, it is possible to provide a small electromagnet device which is easier to assemble than the conventional product and has a good assembly yield. Further, since the position of the bobbin is easy to be constant, the positions of the movable yoke and the coil are constant, and a product with stable characteristics can be obtained. The bobbin-yoke joint structure used in this small electromagnetic device can be applied to general joints between resin molded products and metals with high hardness.

[0008]

[Effect of device]

 As described above, according to the present invention, it is possible to provide a compact electromagnet device which is easy to assemble and has a good yield and stable characteristics.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an example of a small electromagnet device of the present invention.
FIG. 1A is a plan view. FIG. 1A is a side view.

FIG. 2 is an explanatory view showing another example of the small electromagnet device of the present invention. FIG. 2A is a plan view. FIG. 2A is a side view.

FIG. 3 is a plan view showing an example of a conventional small-sized electromagnet device (fixed by crimping).

[Explanation of symbols]

 1a coupling hole 1A pawl coupling hole 1f convex portion 2a movable yoke insertion port 2f pawl a fixed yoke b movable yoke c permanent magnet d adsorption yoke e terminal f bobbin g coil h caulked portion

Claims (2)

[Scope of utility model registration request] 1. A small electromagnet device in which a resin bobbin is attached to a fixed yoke formed in a substantially U shape, and convex portions are provided at both ends of the bobbin, and a fixing hole for coupling with the convex portion is provided in the fixed yoke. A small electromagnet device. 2. The small electromagnet device according to claim 1, wherein the convex portion is a pawl, and the hole for coupling with the pawl is a pawl coupling hole.