JPS621729Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a motor type time switch.

Traditionally, motor-type time switches
For safety measures such as preventing electrical leakage or contact, wrap insulating tape, etc. several times around the bobbin over the coil that has already been wound around the bobbin, which is pivotally supported by the stator that acts on the motor rotor. It was treated to prevent exposure.

Because of this process, the assembly efficiency of the motor-type time switch was poor, and furthermore, depending on the way the insulating tape was wound, insulation problems could occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a motorized time switch which advantageously overcomes the drawbacks of the prior art mentioned above.

Another object of the present invention is to provide a motorized time switch with improved assembly efficiency.

The basic feature of the present invention is that a cam is rotated by the rotation of a motor via a deceleration mechanism, and the case of the time switch is used in a motor-type time switch in which a cam is rotated by the rotation of a motor, and a switch is actuated at a set time by the rotation of the cam. It is divided into three parts: a lower case, an intermediate case fixed to the lower case and supporting one end of the rotor shaft of the motor, and a lid body attached to the intermediate case via a stator and supporting the other end of the rotor shaft. A coil is wound around the stator via a bobbin, and recesses for accommodating the coil are formed in the intermediate case and the lid at positions corresponding to the bobbin, respectively.

Hereinafter, one embodiment of the present invention will be described based on the drawings. Fig. 1 is a partially exploded perspective view of the motorized time switch according to the present invention, and Fig. 2 is a side sectional view of the assembled time switch shown in Fig. 1, in order to clearly show the internal structure. For the upper side of the intermediate case 5, an assembled sectional view taken from the rotor axis in the direction of the coil and from the rotor axis in the direction of the reduction gear train axis is shown.
Also, a gear 4 is shown inside the lower case 1.

In FIGS. 1 and 2, reference numeral 1 indicates the lower case of the motor type time switch. , this lower case 1 includes a switch 2 consisting of leaf springs 2a, 2a, 2a each connected to a power source (not shown), etc.
Leaf springs 2a, 2a, 2 forming this switch 2
a cam 3 that is in constant sliding contact with one of the switches 2 and 3 and turns the switch 2 on and off by rotation; and a gear 4 that is arranged coaxially with the cam 3 and that reduces the rotational speed of a motor etc. and transmits it to the cam 3. is stored.

Then, on the upper side of the lower case 1, screw holes 1a, 1a, 1a are provided at predetermined positions.
A projection 1b for fitting into an engagement hole 5a provided in the intermediate case 5 is formed. In order to attach and fix the intermediate case 5 to the lower case 1, after fitting the protrusion 1b formed on the lower case 1 into the engagement hole 5a formed on the intermediate case 5, screws 6, 6,
This is done using

A storage section 7 is formed approximately in the center of the intermediate case 5, and a rotor 9 that rotates under the action of a stator 8 and a rotor 9 that is arranged coaxially with the rotor 9 and that is decelerated are arranged in the storage section 7. A pinion 11 that transmits rotational force to the gear train 10, 10, 10, and a reduction gear train 10, 1 that decelerates and transmits the rotation of the rotor 9 to the gear 4.
0 and 10 are stored.

On the upper side of this storage part 7, screw holes 7a, 7a are provided at predetermined positions, and engagement protrusions 7 are provided.
b, 7b, 7b, 7b are formed. The stator 8 acting on the rotor 9 has these engagement protrusions 7b,
Holes 8 bored in the stator 8 in 7b, 7b, 7b
A, 8a, 8a, 8a are fitted to each other to be locked to the intermediate case 5. here,
The stator 8 is made up of a plurality of unillustrated parts arranged opposite to each other so as to surround the rotor 9. Since the rotor 9 has a core pole and has north and south poles arranged alternately on the circumferential surface, the rotor 9 rotates due to attraction and repulsion between them. Furthermore, an upward recess 13' is formed in the intermediate case 5 adjacent to the storage portion 7 and covering the coil 12 from below.

The coil 12 is wound around a bobbin 13 that is pivotally supported by the stator 8. One end of the coil 12 is connected to a terminal 14, and the other end is connected to a terminal 15.

One end of a connector 16 made of a metal plate is press-fitted to the terminal 15, and the other end of the connector 16 is connected to the leaf springs 2a, 2 housed in the lower case 1.
It is press-fitted and connected to the central plate springs a and 2a. Incidentally, in order to enable connection of this connecting tool 16 to the central leaf spring 2a, a hole 17 through which the connecting tool 16 is inserted is previously formed at the bottom of the intermediate case 5.

Furthermore, the connection tool 16 should be attached to the terminal 15 before the stator 8 is attached to the intermediate case 5.

The bobbin 13 has collar portions 13 on both sides.
a, 13a are formed, and one collar part 13a
An engagement protrusion 13b is formed in the other collar portion 13a, and an engagement hole 13c is formed in the other collar portion 13a.

A cover 18 covers the rotor 9, stator 8, and coil 13, and rotatably supports the shaft 9a of the rotor 9 and the shaft 10a of the reduction gear train 10.

This lid body 18 has holes 18a, 18a for inserting screws 19, 19 formed at positions corresponding to the holes 7a, 7a drilled in the intermediate case 5, and holes 18a, 18a for inserting screws 19, 19 on the lower side of the intermediate case 5. A downward recess 20 is formed at a position corresponding to the recess 13 to cover the coil 12 from above. The recess 20 has a hole 20a that fits into a projection 13b formed on one collar 13a of the bobbin, and a downward projection 20b that fits into a hole 13c formed on the other collar 13a of the bobbin. It has been formed. In order to attach this lid body 18 to the intermediate case 5, a hole 2 is formed in the concave portion 20 at a protrusion 13b and a hole 13c formed in the flanges 13a and 13a of the bobbin, respectively.
After fitting 0a and projection 20b, screw 19,
This is done using No. 19. Note that 21 is a winding shaft for time-limited operation that also serves as a bearing.

According to the present invention, the upwardly directed recess 1 is formed in the intermediate case 5 that supports one end of the rotor shaft of the motor.
3' and a recess 20 formed in the lid 18 that supports the other end of the rotor shaft. This has the effect that insulation can be achieved without the need to use a separate member for insulation.

Furthermore, stack the intermediate case 5 on the lower case 1,
Since it is possible to assemble the motor type time switch by stacking the stator 8 on the intermediate case 5 and finally the lid 18, the efficiency of the assembly work is improved.

Since the brim portions 13a, 13a of the bobbin function to cover the coil 12, the shape of the downward recess 20 and the upward recess 13' can be easily formed.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded perspective view of a motor-type time switch according to the present invention, Fig. 2 is an assembled sectional view of the motor-type time switch according to the present invention, and Fig. 3 is a diagram showing a case where a terminal and a switch are connected using a connector. It is an explanatory diagram. 1...lower case, 2...switch, 3...
Cam, 4... Gear, 5... Intermediate case, 7... Storage section, 8... Stator, 9... Rotor, 9a... Rotor shaft, 10, 10, 10... Reduction gear train, 1
2...Coil, 13'...Upward recess, 13'...
...Bobbin, 16...Connection tool, 17...Connection tool insertion hole, 18...Lid body, 20...Downward recess.

Claims (1)

[Claims for Utility Model Registration] (1) A motor-type time switch in which a cam is rotated by the rotation of a motor via a deceleration mechanism, and a switch is operated at a set time by the rotation of the cam. a lower case, an intermediate case fixed to the lower case and supporting one end of the rotor shaft of the motor, and a lid body attached to the intermediate case via a stator and supporting the other end of the rotor shaft. The stator is divided into three parts, a coil is wound around the stator via a bobbin, and recesses for accommodating the coil are formed in positions corresponding to the bobbin in the intermediate case and the lid, respectively. Features a motorized time switch. (2) The motor type time switch according to claim 1, wherein the collar of the bobbin is engaged with both sides of the intermediate case and the lid.