JPH028540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a motor timer used for controlling the operation of electrical appliances and the like.

[Conventional technology]

In recent years, household electrical appliances such as room air conditioners, electric fans, and electric rice cookers have been equipped with timers that control their operation according to various conditions in order to improve the convenience of use.

In general, this type of timer has advantages such as accurate control time and long-term control, so motor timers that use a synchronous motor with a constant rotation speed as the drive source are widely used. It has been adopted.

Incidentally, in this type of motor timer, the motor has conventionally been attached to the timer case with screws.

[Problem to be solved by the invention]

However, in conventional motor timers, not only are multiple screws required to attach the motor to the timer case, but also the stator holding member (unit holding member) of the motor is caulked and fixed to the motor case. There was a problem in that the assembly work and installation work were complicated.
Further, caulking the stator holding member to the motor case makes it difficult to disassemble the motor itself, which poses a problem in that maintenance and inspection of the motor cannot be performed easily. Furthermore, the necessity of caulking and fixing in assembling the motor has the disadvantage that defective products occur due to the caulking work, resulting in a decrease in yield. Furthermore, there is no function to position each component of the motor with respect to the timer case when assembling the motor, resulting in the accumulation of manufacturing errors in each component, resulting in a reduction in the accuracy of motor assembly.

The present invention has been made in view of the above circumstances, and it is possible to easily perform motor assembly, installation, and maintenance/inspection work, improve yield, and improve motor assembly accuracy. The present invention provides a motor timer that can be increased.

[Means to solve the problem]

In the motor timer according to the present invention, the boss positions the lower unit holding member and the coil bobbin unit of both the upper and lower unit holding members, and the engaging piece engages with the upper unit holding member. The motor is sandwiched between the timer case and the timer case.

[Effect]

In the present invention, the motor is attached and assembled to the timer case by engagement with an engagement piece and positioned by a boss, and the motor is removed and disassembled by disengagement by an engagement piece and positioning by a boss. You can do it by leaning.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the structure etc. of this invention will be explained in detail by the Example shown in the figure.

1 and 2 are an exploded perspective view and a sectional view showing a motor timer according to the present invention, and FIG. 3 is a bottom view cut away and showing a timer case of the motor timer according to the present invention. In the figure, the reference numeral 1 designates a timer case in the shape of a box with an opening on one side, and is entirely made of a resin material such as plastic. The opening of the timer case 1 has a lid 2 having a large number of through holes 2a, 2a, .
is installed. And this timer case 1
Four engaging pieces 1a, 1a, . . . and two bosses 1b, 1b are provided on the outer surface of. Also,
A through hole 1c opening inward and outward is provided in the center of the bottom surface of the timer case 1, and a bearing portion 1d for press-fitting and holding one end of a rotor shaft, which will be described later, is provided inside. Reference numeral 3 designates a synchronous motor as a timer drive source, which includes two unit holding members 4 and 5 located above and below, and a coil bobbin unit 6 provided between these upper and lower unit holding members 4 and 5.
It consists of a rotor shaft 7 provided on the same axis as this coil bobbin unit 6, and a rotor 8 rotatably mounted on this rotor shaft 7, and the bosses 1b and 1b hold the lower unit. Part 5
By positioning the coil bobbin unit 6 and engaging the engaging pieces 1a, 1a, . . . with the upper unit holding member 4, the engaging pieces 1a, 1a, . It is sandwiched between the outer surface and the outer surface. The upper unit holding member 4 of each component of this synchronous motor 3
The edge of the wall 4 is formed by bending it downward.
a, 4a, ... are formed, and these wall portions 4
a, 4a, . . . have engaging pieces 9, 9, which are open in the wall thickness direction and are engaged with the aforementioned engaging pieces 1a, 1a, .
...is provided. Note that these engaging pieces 9,
The distance between the hole edges of 9, . . . and the outer surface of the timer case 1 is equal to the distance between the engaging surfaces of the engaging pieces 1a, 1a, . The dimensions are set to be slightly larger than the distance. Further, the unit holding member 4
Protruding pieces 4b, 4b, . . . are provided at the center of the plate by cutting and raising them downward.
On the other hand, a through hole 5a through which the rotor shaft 7 is inserted is provided in the center of the lower unit holding member 5, and protruding pieces 5b, 5b are formed around the through hole 5a by cutting and raising the rotor shaft 7 upward. ,... are provided. The corner of this unit holding member 5 has a through hole 5 through which the bosses 1b, 1b are inserted.
c, 5c are provided. The coil bobbin unit 6 includes an annular coil bobbin 11 having a coil 10 wound thereon, and a bobbin case 12 that houses the coil bobbin 11. Terminal pieces 11a, 11a projecting in the radial direction are attached to the coil bobbin 11. On the other hand, on the central surface of the bobbin case 12, there are bosses 12a, 12a for positioning the upper unit holding member 5, and the protruding pieces 4b, 4b, .
slits 12b, 12b, . . . into which the terminal pieces 11a, . . .
Concave grooves 12c, 12c into which 11b fits are provided. The corners of this bobbin case 12 have through holes 12d, 1 into which the bosses 1b, 1b are fitted.
2d, and a bearing portion 12e for press-fitting and holding the other end of the rotor shaft 7 is provided on the back surface of the central portion. A drive gear 13 extending in the axial direction is integrally provided in the center of the rotor 8. 14, 14, . . . are support shafts extending in the same axial direction as the rotor shaft 7, and are mounted in the through holes 2a, 2a, . 15 is a reduction gear train that reduces the rotation of the synchronous motor 3;
A first stage gear 16 meshing with the driving gear 13 and a large number of gears 17, 17, . . .
The gears 16 to 18 are rotatably mounted on the support shafts 14, 14, . . . Reference numeral 19 denotes a cam setting shaft having a disk cam 20, which is rotatably provided in the timer case 1, and has a cam drive gear 21 on its outer peripheral surface that meshes with the gear 18 of the reduction gear train 15.
is fixed. Reference numeral 22 denotes a leaf switch having a contact point 22a, which is attached to the timer case 1 and is configured to be opened and closed by the rotation of the disc cam 20. Note that 23 is a locking member that locks the protrusion 24 of the disc cam 20 to regulate the set time. 25 is a switch box equipped with a leaf switch, which is detachably attached to the timer case 1;
The device is configured so that time-limited control or multi-stage time-limited control of two instruments can be performed using the timer.

In the motor timer configured in this way, the motor 3 is attached and assembled to the timer case 1 by engaging the engaging pieces 1a, 1a and by engaging the boss 1.
By positioning by b, 1b, motor 3
can be removed and disassembled by releasing the engagement by the engaging pieces 1a, 1a and releasing the positioning by the bosses 1b, 1b.

Further, in this embodiment, since the caulking and fixing which was conventionally necessary for assembling the motor 3 is not necessary, it is possible to prevent the occurrence of defective products due to the caulking work.

Furthermore, in this embodiment, since each component of the motor 3 can be positioned relative to the timer case 1 during motor assembly, accumulation of manufacturing errors in each component can be avoided.

Next, assembly of the motor 3 in the present invention will be explained.

First, the coil bobbin 11 is placed inside the bobbin case 12.
Position and store. Next, the bobbin case 12
One end of the rotor shaft 7 is press-fitted and held in the bearing portion 12e. Thereafter, the rotor 8 is mounted on the rotor shaft 7, and then the unit holding members 4 and 5 are laminated on the coil bobbin unit 6.

In this way, the motor 3 can be reliably assembled.

After this, the other end of the rotor shaft 7 is connected to the timer case 1.
The drive gear 1 is press-fitted into the bearing portion 1d of the
Positioning for timer case 1 of No. 3 is performed.

In this embodiment, an example is shown in which the end of the rotor shaft 7 is first press-fitted and held in the bearing part 12e, but the present invention is not limited to this. Even if you do, there is no problem.

Further, in the present invention, it goes without saying that each component of the synchronous motor 3 may be sequentially stacked on the timer case 1.

Incidentally, to explain the operation of the motor timer in the present invention, the disc cam 20, which is set to the required time by rotating the cam setting shaft 19,
The contact 22a of the leaf switch 22 is closed (or opened). On the other hand, when the synchronous motor 3 gradually rotates the drive gear 13 in the direction of the arrow through the reduction gear train 15, the leaf switch 22 moves to the recess (or convex part) on the disc cam 20 after a set time.
By engaging with the contact 22a, the contact 22a becomes open (closed).

〔Effect of the invention〕

As explained above, according to the present invention, the boss positions the lower unit holding member and the coil bobbin unit of both the upper and lower unit holding members,
In addition, since the engaging piece engages with the upper unit holding member, the motor is held between the engaging piece and the timer case, so the motor can be attached and assembled to the timer case by the engaging piece. The motor can be removed and disassembled by releasing the engagement with the engagement piece and the positioning using the boss, thereby simplifying the assembly and installation work of the motor. Can be done. Further, since caulking is not required when assembling the motor, the motor itself can be easily disassembled, and maintenance and inspection work for the motor can be simplified. Furthermore, since caulking is not required when assembling the motor, it is possible to prevent the production of defective products due to the caulking work, thereby improving yield. Furthermore, since each component of the motor can be positioned relative to the timer case when assembling the motor, it is possible to avoid the accumulation of manufacturing errors in each component and improve the accuracy of motor assembly. There are also advantages.

[Brief explanation of drawings]

1 and 2 are an exploded perspective view and a sectional view showing a motor timer according to the present invention, and FIG. 3 is a bottom view cut away and showing a timer case of the motor timer according to the present invention. 1...Timer case, 1a...Engagement piece, 1b...
...Boss, 3...Motor, 4, 5...Unit holding member, 5c...Through hole, 6...Coil bobbin unit, 9...Engagement hole, 12d...Through hole.

Claims (1)

[Claims] 1. A motor timer comprising a timer case 1 and a motor 3, wherein the timer case 1 has an engaging piece 1a on its outer surface.
and a boss 1b, and the motor 3 has upper and lower unit holding members 4 and 5, respectively, and both upper and lower unit holding members 4,
The motor 3 has a coil bobbin unit 6 between the upper and lower unit holding members 4 and 5, and the motor 3 has a boss 1b that positions the lower unit holding member 5 of the upper and lower unit holding members 4 and 5 and the coil bobbin unit 6, and A motor timer characterized in that the engaging piece 1a is held between the engaging piece 1a and the timer case 1 by engaging with the upper unit holding member 4.