JPS6247164Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a motorized time switch.

Conventionally, this type of time switch consists of a time switch body that houses a time limit setting mechanism that can set a time limit by external operation, a reduction gear mechanism that decelerates the rotational output from the motor, a contact section, and a cam section that opens and closes the contact section. It generally consists of a time switch drive motor attached to the back of the time switch body.

However, in the case of the above-mentioned time switch, the above-mentioned parts are installed in a stacked state in the thickness direction of the above-mentioned time switch, which is a factor that increases the thickness of the above-mentioned time switch itself. When the time switch is mounted on the mounting panel surface due to its thickness, it is usually fixed by providing a boss on the lid of the time switch and fixing it with screws. Furthermore, in order to attach the time switch to a printed circuit board, etc., fixing it by soldering alone does not provide sufficient fixing strength, and it is structurally impossible to align all the terminals of the time switch on one plane. However, there were problems in that it was impossible due to various reasons.

This idea was created in view of the above problems, and the slide mechanism section, motor, reduction gear mechanism section, and contact section are arranged side by side on a plane to make the entire time switch thinner and smaller. To provide a time switch which can be easily attached to a mounting board and can be stably and firmly fixed.

An embodiment of this invention will be described in detail below with reference to the drawings.

FIG. 1 is an exploded perspective view of the time switch of this embodiment, which includes a synchronous motor 3 mounted on a base frame 1, an idle gear 4, a reduction gear mechanism 5, a frequency switching mechanism 6,
A one-way clutch mechanism 9 consisting of a pinion gear 7 and a spring 8, a slider 10, and a speed plate 11
, switch levers 12 and 13, and motor contact 1
4, a time limit contact 15, etc.

The base frame 1 has rectangular box-shaped slide cases 1d arranged side by side on one side thereof, and a peripheral wall is formed along the outer periphery on the other side. A lid 2 that covers the entire upper surface of the slide case 1d and the base frame 1 is attached to the lid 2.
The fitting claw 2a extending from the base frame 1
It is fixed by fitting into the fitting hole 1a formed in the peripheral wall and the side wall of the slide case 1d.

Further, a motor housing portion 1b is formed at one end of the base frame 1, into which a flat cylindrical synchronous motor 3 is fitted from the bottom side of the base frame 1.

As shown in FIG. 3, the motor accommodating portion 1b is recessed from the lower surface side of the base frame 1 to the upper surface side by approximately the height of the motor 3, and the upper surface of the motor 3 comes into contact with the motor housing portion 1b. Motor top plate 1
An opening 1n from which the output gear 3a of the motor 3 projects is formed in the opening 1n.

As shown in FIG. 4, a plurality of locking pawls 1c are provided on the outer periphery of the motor storage portion 1b, which is recessed into approximately the outer shape of the motor. These locking claws 1c can lock and fix the motor 3 fitted into the motor storage portion 1b.

As shown in FIG.
The rotational output from the motor 3 is reduced to a predetermined rotational speed by eight reduction gears between a and 5h, and this reduced rotational output is transmitted to the input gear 7' below the pinion gear 7. .

The reduction gear mechanism 5 is arranged in parallel adjacent to the motor housing portion 1b, and each of the reduction gears 5a to 5h is arranged parallel to the output gear 3a of the motor 3, and the first reduction gear By configuring the gear 5a as the uppermost stage and on the same plane as the output gear 3a, the reduction gear mechanism 5 can be housed within the height of the motor 3 including the output gear 3a. is now possible.

The idle gear 4 meshes with the output gear 3a and the first reduction gear 5a to transmit the rotational output of the motor 3 to the reduction gear mechanism 5, and the rotation shaft 4a of the idle gear 4 is connected to the The rotating shaft 4a is installed upright on the top surface of the motor top plate 1m.
By pivotally attaching the idle gear 4 to the motor 3, the motor 3 having a substantially large radius can be used without using a large-diameter idle gear, and no extra space is required.

Further, as shown in FIG. 4, a recess 1j is formed on the back surface of the slide case 1d along its longitudinal direction, and this recess 1j is opened at the side surface of the motor 3. A small opening 1k communicating with the recess 1j is cut out in the side wall near the contact placement portion.

As shown in FIG. 5, the two lead wires 3b from the motor 3 pass through the recess 1j, exit from the small opening 1k to the outside of the slide case 1d, and stand up at the terminals of the motor contacts 14. 26,
17a, respectively.

The height of the slide case 1d above is the slide 1
Since the height for accommodating the slider 10 and the motor wiring 3b are not required so much, the accommodating section for the slider 10 and the recess 1j for accommodating the motor wiring 3b can be integrally formed within approximately the same height as the motor accommodating section 1b. It is.

Note that a locking protrusion for press-fitting and fixing the motor wiring 3b may be provided in the recess 1j to ensure that the motor wiring 3b is fixedly accommodated in the recess 1j.

The frequency switching mechanism 6 switches gears according to the power supply frequency of 60/50Hz, and as shown in FIG.
By externally switching the switching lever 6d, the gear mounting portion 6a is rotated by a predetermined angle, and as shown in FIG. Between the gears 6b, 6
(c) meshes with each other to transmit rotational output at a predetermined rotational speed.

The one-way clutch mechanism 9 includes a pinion gear 7
As shown in FIG. 3, the pinion gear 7 is integrally attached to the upper end of a flexible pinion shaft 7a, and a reduction gear is connected to an input gear 7' also attached to the lower end. Mechanism 5
The rotational output decelerated from the pinion gear 7 is transmitted to the pinion gear 7.

The upper end of the pinion shaft 7a is movably supported in a triangular hole 2b formed in the lid 2, and is further pressed by a spring 8.
Due to this pressing force, the pinion gear 7 meshes with a rack 10a formed on the side surface of the slider 10 along the sliding direction, and the rotational output from the motor 3 causes the slider 10 to return to its initial position. Further, when the slider 10 is slid by an external operation, the pinion shaft 7a is bent and the pinion gear 7 and the rack 10a are disengaged, allowing the slider 10 to slide freely.

As shown in FIG. 1, the slider 10 has a substantially rectangular parallelepiped shape, with a lever 10b vertically protruding from the center of its upper surface, and a rack 10a formed along the sliding direction on one side. There is.

The slider 10 includes the slide case 1
d, and is slidably housed in the lever 10.
b protrudes from a slit 2c formed in the lid 2 so that the slider 10 can be slid by external operation.

One end of the slider 10 is notched in a tapered shape to form a tapered part 10c, and when setting the time limit, this taper part 10c allows the claw parts 12a and 13a of the switch levers 12 and 13 to be smoothly attached to the side surface of the slider 10. It can be guided and brought into contact.

Further, a projection 10d protruding in the form of a thin line is formed on the lower surface of the slider 10, and a linear guide groove 1e (a second
) are formed, and these allow the slider 10 to slide smoothly within the slide case 1d.

As shown in FIG. 1, the quick-moving plate 11 is a substantially rectangular plate in which a fitting hole 11a is formed which loosely fits into the protrusion 10d on the lower surface of the slider 10 with play in the sliding direction, It is installed between the slider 10 and the slide case 1d, and can freely move relative to the slider 10 by a certain distance in the sliding direction, and can move inside the slide case 1d along with the slider 10. It slides.

When setting the time limit by sliding the slider 10 by external operation, the speed-moving plate 11
is located on the right in the figure, and its tip 11b is located at a position lower than the tapered part 10c of the slider 10, and when the slider 10 returns, it is located on the left in the figure and its tip 11b is lower than the tapered part 10c of the slider 10. 11b moves together with the slider 10 so as to be aligned with the tip of the tapered portion 10c, and when the slider 10 returns to its initial position, it touches the claw portion 13a of the switch lever 13 that was in contact with the side surface of the quick-moving plate 11. By being pressed, the switch levers 12 and 13 are instantaneously moved to the right in the figure, thereby instantaneously returning the switch levers 12 and 13 to their initial positions.

As shown in FIG. 6, the motor contact 14 is composed of a movable contact piece 17 having spring properties and a fixed contact piece 16. Both contact pieces 16 and 17 are arranged parallel to each other on the frame portion 1g at one end of the base frame 1. It is press-fitted into the cut slits 21 and 22.
The free end of the fixed contact piece 16 is biased toward the movable contact piece 17 by its own springiness, and the motor contact 14 is moved by contacting the side surface of the square column 28 erected on the base frame 1. It is normally open.

The time-limiting contact 15 is composed of a movable contact piece 19 having spring properties, a fixed contact piece 18 and a fixed contact piece 20 having rigidity.
Similar to the motor contacts 14, the contacts 19 and 20 are press-fitted into slits 23, 24, and 25 cut into the frame portion 1g in parallel with the slits 21 and 22, respectively.

The free end of the fixed contact piece 18 is connected to the fixed contact piece 1
Similarly to 6, the movable contact piece 19 is normally restrained from coming into contact with the movable contact piece 19 by coming into contact with a triangular prism 27 erected on the base frame, and is in an open state. Further, most of the fixed contact piece 20 is press-fitted into the slit 25 and fixed, and the movable contact piece 19 is normally in contact with the fixed contact piece 20 to be in a closed state.

Terminal portions 16a to 20a protruding toward the back side of the base frame 1 are formed on the fixed end side of each of the contact pieces 16 to 20, and these terminal portions are inserted into a mounting board and soldered. This allows the time switch to be easily fixed on the mounting board.

In addition, when installing this time switch on the mounting board as described above, the terminal portions 16a to 20a
In order to ensure insulation between the terminal portions 16
a, 18a, and 20a are configured to protrude from the middle of the frame portion 1g toward the back side of the base frame 1, thereby increasing the distance between the other terminals.

As shown in FIG. 2, a fixed terminal 26 for motor wiring is fixed at the extreme end of the frame portion 1g in the same manner as the above terminal and protrudes toward the back side of the base frame 1.

The fixed terminal 26 for motor wiring and the terminal portion 17a also protrude toward the front side of the base frame as shown in FIG.
A lead wire 3b from the motor 3 is connected to the time switch in advance when the time switch is manufactured, and all that is left to do is to attach it to the mounting board.

Then, in order to prevent the motor side end from becoming unstable when this time switch is attached to the mounting board, a rigid fixing pin 1l is protruded toward the back side of the base frame 1 near the motor housing section 1b on the back side of the base frame 1. By fixing the fixing pin 1l to the mounting board by press-fitting, soldering, etc. in the same way as the terminal section, the time switch can be mounted firmly and stably.

As shown in FIG. 6, the switch levers 12 and 13 are rod-shaped lever portions 12c of the same length,
Ring-shaped supports 12d and 13d are provided at one end of 13c.
The switch levers 12 and 13 are attached to the base frame 1 by rotatably fitting the support portions 12d and 13d to a shaft 1f erected on the base frame 1.

Further, claw parts 12a and 13a having the same shape are formed at the other ends of the lever parts 12c and 13c, respectively, and a columnar contact operating part 12b is provided at a position opposite to the claw part 12a of the switch lever so that it can be moved downward as it is. It is installed vertically, and its side surface is in contact with the contact piece 19. Further, a columnar contact operating portion 13b is vertically provided on the switch lever 13 via an L-shaped arm 13e extending horizontally from the center of the side surface of the lever portion 13c facing away from the claw portion 13a. This side surface is in contact with the contact piece 17.

In this way, the two switch levers 12,1
3 can perform the opening/closing operation of the contacts while being arranged in a plane on the upper surface of the contacts 14 and 15.

Arm portion 12 of the switch levers 12, 13
c, 13c are pressed by the spring pressure of the contact pieces 17 and 19, and are attached to the side wall 1h of the slide case 1d.
, the claws 12a and 13a protrude into the slide case 1d, and this state becomes the initial state of the switch levers 12 and 13 and the contacts 14 and 15, opening the motor contact 14 and stopping the time switch. condition. Further, when the slider 10 returns to its initial position, the claw portions 12a,
13a suddenly falls into the slide case 1d, causing the time-limiting contact 15 and the motor contact 14 to be instantaneously reversed.

As explained above, in the time switch of this invention, the entire time switch is made thinner and smaller, the terminal part is made to protrude from the back of one end of the base frame, and the other end is provided with a stabilizing fixing pin. By providing this, the time switch can be easily fixed to the mounting board by soldering, and has the advantage that it can be mounted stably and firmly.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the time switch according to this invention, Fig. 2 is a plan view with the lid removed, and Fig. 3 is the line AA and B-B in Fig. 2. A line sectional view, FIGS. 4 and 5 are perspective views of the time switch as seen from the back side, and FIG. 6 is a partially enlarged view of the vicinity of the contact points. DESCRIPTION OF SYMBOLS 1...Base frame, 1d...Slide case, 1l...Fixing pin, 2...Lid, 3...Synchronous motor, 5...Reduction gear mechanism, 7...Pinion gear, 9...One-way clutch mechanism, 10...Slider, 10a...Rack, 11...Speed plate, 1
2, 13...Switch lever, 14...Motor contact, 15...Time limit contact.

Claims (1)

[Scope of utility model registration request] A slider that is housed in a slide case so as to be reciprocally slidable and can be positioned arbitrarily by external operation, and has a rack formed along the sliding direction, and a base that extends integrally with the slider on one side of the slide case. a frame; a lid that covers the entire upper part of the slide case and the base frame; a motor attached to one end of the base frame; It has a reduction gear mechanism that reduces the output, and a pinion gear that is disposed on the side of the slide case and meshes with the rack of the slider, and the rotational output of the reduction gear mechanism drives the pinion gear to initialize the slider. A one-way clutch mechanism that slides the clutch back toward the position; and a one-way clutch mechanism that is installed between the slider and the slide case, that can freely move relative to the slider by a certain distance in the sliding direction, and that can move along with the slider. A quick-moving plate that slides inside the slide case is rotatably attached to a shaft erected on the base frame at the side of the slide case, and the slider is moved to an appropriate sliding position from the initial position. A switch lever that comes into operation when it comes into contact with and is pressed by the side surfaces of the slider and quick-acting plate in a certain state, and a contact piece at the other end on the base frame, the longitudinal direction of which is parallel to the bottom surface of the base frame. A motor contact and a time-limiting contact are arranged in parallel to this and interlocked with the switch lever, and a terminal portion provided on each contact piece constituting the motor contact and the time-limiting contact is connected to the other end of the base frame. A fixing pin protrudes from the back side of one end of the base frame and is embedded in the base frame, and by fixing each of the terminal parts and the fixing pin to the mounting board, the entire board A time switch that is stably fixed to the