JPH0248065Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an electric spraying device for spraying liquids such as water and paint, and particularly relates to a fixed iron core and a bobbin that constitute a part of an electromagnetic drive unit. Regarding the improvement of the fixing structure of.

[Related technologies and their problems]

A general spraying device will be explained with reference to Fig. 4.
Reference numeral 1 denotes a main body housing to which an electromagnetic drive unit 2 is attached and fixed.A grip 3 is formed on this main body housing 1 and extends downward from its rear end, and this grip 3 is provided with a switch 4.
By applying an AC voltage to the electromagnetic drive unit 2 through the operation of the switch 4, the movable part formed in the electromagnetic drive unit 2 is reciprocated in the back and forth direction. It is made swingable. 1A is a pump housing fixed to the front side of the main body housing 1 with a set screw 5, and a cylinder 6 is arranged in the front-rear direction within this pump housing 1A. A piston 7 is inserted from the rear of the cylinder 6, and a bullet 8 is inserted between the cylinder 6 and the piston 7.
The piston 7 is formed so as to be able to reciprocate within the cylinder 6 by the reciprocating action caused by the excitation applied to the electromagnetic drive unit 2 and by the firing action of the ammunition 8. A lid 9 is integrally formed on the lower end side of the pump housing 1A, and a container 10 for storing water, paint, etc. is suspended by a threaded portion 11. 12 is a suction hole formed in the pump housing 1A and the lid 9;
Reference numeral 3 designates a similarly constructed discharge hole, and the upper end of the suction pipe 14 is inserted into the suction hole 12 of the lid 9, and a strainer 15 is arranged so as to surround the suction port of the suction pipe 14. . Reference numeral 16 denotes a nozzle holder, which is screwed onto the tip of the pump housing 1A so as to fix the valve 17, bullet 18, and nozzle 19 arranged at the tip of the pump housing 1A.
1B is a housing cover that covers the electromagnetic drive section 2 and the like, and this housing cover 1B is fixed to the main body housing 1 with screws 20. Reference numeral 21 denotes an adjuster screwed onto the main body housing 1 via a bullet 22. Depending on the degree of screwing of the adjuster 21, the electromagnetic drive section 2 between the tip of the adjuster 21 and the engaging portion 23
Adjustably regulates the swing width of the movable part formed in the

Therefore, due to the excitation of the electromagnetic drive unit 2, the electromagnetic drive unit 2 is moved within the distance between the adjuster 21 and the locking portion 23.
The piston 7 reciprocates within the cylinder 6 in conjunction with the operation of the movable part and the bombardment 8, and the reciprocating movement of the piston 7 causes suction and compression. During the process, liquid such as water or paint in the container 10 is sucked into the cylinder 6 through the suction pipe 14, and as the piston 7 is compressed, the valve 17 provided at the open end of the cylinder 6 absorbs the force of the bullet 18. The gap between the cylinder 6 and the cylinder 6 is opened against the pressure, and the liquid such as water or paint that passes through the gap between the open end of the cylinder 6 and the valve 17 flows into the nozzle 19.
It is sprayed from the injection hole.

By the way, as shown in FIGS. 5 and 6, the electromagnetic drive unit 2 is provided with a fixed iron core 30 formed by laminating a large number of thin iron plates and fastening them with pins 31.
The bobbin 33 around which the solenoid coil 32 is wound is inserted into the central iron core 30A of 0, and the crimped part 3
A movable core 35 made of a large number of laminated iron plates is disposed facing the fixed core 30, and a movable core 35 made of a large number of laminated iron plates is disposed opposite to the fixed core 30. A leaf spring 36 is latched and held at the upper end center position, and the movable core 3 is moved by the suction action of the fixed core 30 generated by the excitation of the solenoid coil 32 and the spring action of the leaf spring 36.
5 is formed to swing back and forth. In this case, since the reciprocating motion of the movable core 35 is very high speed, the vibration caused by the impact of the movable core 35 becomes intense, and when the bobbin 33 is not sufficiently secured by the caulking portion 34 to prevent it from coming off, the bobbin 33 moves along the center core portion 30A. As a result, the movable core 35 and bobbin 33 collide with each other, causing noise, or the swing width of the movable core 35 fluctuating, and the current characteristics also fluctuating. It had some problems when it was used.

[Purpose of the invention] An object of the invention is to provide a spray device having a fixed structure of a fixed iron core and a movable iron core that can withstand vibrations caused by impact of a movable iron core that constitutes a part of an electromagnetic drive section.

[Summary of the idea]

In this invention, a bobbin around which a solenoid coil is wound is attached to an E-shaped fixed core, and an I-shaped movable core is provided facing the fixed core so as to be swingable by a spring, thereby forming an electromagnetic drive unit. This electromagnetic drive unit is attached and fixed to the main body of the sprayer,
A piston is inserted through the cylinder provided in the main body, and the swinging motion of the movable core caused by the excitation of the solenoid coil is converted into a reciprocating motion of the piston inserted through the cylinder, and the liquid sucked into the cylinder is passed through the nozzle. In the spray device configured to spray from above, an elastic engagement piece is formed on the side of the bobbin, a notch engagement part is provided in the fixed iron core corresponding to the engagement part of the elastic engagement piece, and the above-mentioned elastic The bobbin is fixed to the fixed iron core so as not to come off by the engagement between the engagement portion of the engagement piece and the notch engagement portion.

〔Example〕

Hereinafter, an embodiment of the present invention will be described using the same reference numerals for the same parts as in FIGS. 4 to 6. The fixing structure of the fixed core and bobbin of the present invention is as shown in FIGS. 1 and 2. An appropriate number of elastic engagement pieces 3 are attached to the side surface of a synthetic resin bobbin 33 around which the solenoid coil 32 is wound.
7 is formed so that it can be bent by a hole 38, and a claw-like engagement portion 37A is formed inside the tip of the elastic engagement piece 37, and a side surface of the central core portion 30A corresponding to this engagement portion 37A is formed. A notched engagement hole 39 is provided in the center core portion 30A of the E-shaped fixed core 30.
A bobbin 33 with a solenoid coil 32 wound around it
When inserted, the claw-like engaging portion 37A comes into contact with the side surface of the central core portion 30A as shown in FIG. When the fitting is completed, the claw-like engaging portion 37A engages in the notched engagement hole 39 on the fixed iron core 30 side, as shown in FIG. 2B, and the engaged state is maintained by the elastic force of the engaging piece 37. Therefore, by simply inserting the bobbin 33 into the center core portion 30A of the E-shaped fixed core 30, the claw-like engagement portion 37A of the engagement piece 33 and the notch engagement hole 39 automatically engage. In addition, it is possible to exert a retaining force that can withstand vibrations caused by the impact of the movable iron core 35. In this case, the number and formation position of the elastic engagement pieces 37 may be appropriately selected, and they may be oriented not only vertically but also horizontally, diagonally, etc., and the configuration of the present invention includes various modifications within the scope of the gist. Needless to say.

For example, as shown in FIG. 3, a notch engagement groove 39A is provided on the cut surface 30B side of the central core portion 30A of the E-shaped fixed core 30, and the claw-like engagement portion 37A corresponds to this notch engagement groove 39A. bobbin 33
The engaging piece 37 may be formed on the. Note that the elastic engagement piece 37 and the notch engagement hole 39 or the notch engagement groove 3
It goes without saying that by forming the caulking portion 34 shown in FIGS. 5 and 6 in conjunction with the engagement structure 9A, it is possible to more securely fix the connector.

[Effect of idea]

The present invention forms an elastic engagement piece on the side of the bobbin,
A notched engaging portion was provided in the fixed iron core corresponding to the engaging portion of the elastic engaging piece, and the bobbin was fixed to the fixed iron core so that it could not be removed by engaging the engaging portion of the elastic engaging piece and the notched engaging portion. Therefore, just by inserting the bobbin into the fixed iron core, the engaging part and the notched engaging part automatically engage, providing a good retaining force and eliminating problems such as noise and fluctuations in swing width due to bobbin misalignment. It can be prevented.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the fixed iron core and bobbin of the present invention, Figures 2A and B are sectional views showing how the bobbin is assembled, Figure 3 is a sectional view of another embodiment, and Figure 4 is a general FIG. 5 is a sectional view of a conventional spray device, and FIG. 6 is a side view of the same. DESCRIPTION OF SYMBOLS 1... Main body, 2... Electromagnetic drive part, 6... Cylinder, 7... Piston, 19... Nozzle, 30...
Fixed iron core, 32... Solenoid coil, 33...
Bobbin, 35...Movable iron core, 37...Elastic engagement piece, 37A...Engaging portion, 39...Notch engagement hole, 3
9A...Notch engagement groove.

Claims (1)

[Scope of utility model registration request] A bobbin around which a solenoid coil is wound is attached to an E-shaped fixed core, and an I-shaped movable core is provided facing the fixed core so as to be swingable by a spring to form an electromagnetic drive section. The part is attached and fixed to the main body of the sprayer, and a piston is inserted through the cylinder provided in the main body, and the swinging motion of the movable iron core due to the excitation of the solenoid coil is converted into the reciprocating motion of the piston inserted through the cylinder. In the spraying device which is adapted to spray the liquid sucked into the cylinder from the nozzle, an elastic engagement piece is formed on the side of the bobbin, and the above-mentioned fixing member is formed in a manner corresponding to the engagement portion of the elastic engagement piece. A spray device characterized in that a notch engaging portion is provided in the iron core, and the bobbin is fixed to the fixed iron core so as not to come off by engagement between the engaging portion of the elastic engaging piece and the notch engaging portion.