JPS5843812Y2 - timer device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a timer device applied to various industrial facilities where time control is required.

As is well known, in this type of timer device, for example, C
The R oscillation counting type is mainly composed of a power supply circuit, a CR oscillation circuit, an output relay circuit, etc. The printed circuit board on which each of these main circuits is mounted is covered with a completely sealed case, and there is no outside part. It usually has external connection terminals for instantaneous and time-limited contacts and an operation section for adjusting the set time.

Incidentally, in these timer devices, since the relay part operates mechanically, it has a higher failure frequency than other electric elements, and has a relatively short lifespan, so that the relay is often required to be replaced.

Therefore, considering the replacement of the relay and the workability of the replacement, it is desirable to configure the relay so that it can be inserted and removed from the axial direction (longitudinal direction) of the case. The printed circuit board must be placed perpendicular to the axis of the case.

In addition, the printed circuit board that holds the relay must be fixed to the case in some way, but conventionally, as a means of fixing the printed circuit board, a protrusion for positioning the printed circuit board is provided inside the case in advance. The method used is to position the printed circuit board using screws and then directly fix the printed circuit board to the case using screws.

However, tightening screws in a very limited space when other circuits are already mounted is very complicated and may even damage other circuit elements. there were.

This idea was made in view of the above points.In order to simplify the insertion and removal of the relay, the case is divided into two parts perpendicular to the axis of the timer device, and the relay is fixed. The supported printed circuit board can be positioned and fixed very easily without using screws or the like, and one embodiment of this invention will be described in detail below with reference to the drawings.

First, the circuit configuration of a CR oscillation circuit type timer device as an example of the timer device according to this invention will be summarized as follows.
The basic circuit consists of a power supply circuit, a constant voltage circuit, a CR oscillation circuit, a counting circuit, an output amplification circuit, and an output relay circuit.
The oscillation circuit starts oscillating, and when the counting circuit counts up to the set value using this signal as a reference signal, it generates an output signal.
This signal is amplified to operate the output relay.

In the figure, 1 is a timer case having a rectangular tube shape, and this case 1 is a mounting plate (2a) for mounting the entire timer device on a desired object, such as a control panel.
It is composed of a bottom part 2 with ing.

The above-mentioned basic circuit is mounted near the mutually fitting part of both the middle body 3a and the lid body 3b, and the printed circuit boards 4 and 5, which have the same shape, are parallel to each other, and the axis of the case 1 is centered. A protrusion 6 is provided on the inner circumferential surface of the
a, 6b and 7a, 7b, and by interconnecting these printed circuit boards 4, 5 with screws 8, 8, the middle body 3a and the lid body 3b are integrated, and the cover 3 is It is formed.

Since the means for attaching the printed circuit boards 4 and 5 to the cover 3 are the same for both printed circuit boards, only the printed circuit board 4 will be explained based on FIG. Notch 4
a, 4a... are formed at equal pitches, and corresponding to these notches 4a, 4a..., the side of the fitting part with the lid 3b of the middle body 3a is Notch 4 on the inside
Protrusions 6a, 5a, which fit correspondingly to a, 4a...
... are formed, and these protrusions 5a
, 5a, . . . are formed at a position one level below the plane on which the ridges 6b, 6b, . Said protrusion 5
A, 5a, .

Then, the printed circuit board 4 is placed horizontally from the opening of the middle body 3a, and the notches 4a, 4a... are aligned with the protrusions 6.
a, 6a..., so that it fits into the middle body 3a.
The printed circuit board 4 is inserted into the ridges 5a, 5a...
... and 6b, 6b... By sliding it in the X direction while being positioned between them, the printed circuit board 4 is held between the protrusions 6a and 6a and between 7a and 7a (M positioned). At the same time, when the bottom part 2 and the cover 3 are integrated by a mounting screw 19 described later, the mounting screw 1
The sleeve 20 into which the sleeve 9 is inserted comes into contact with the cutout end surface 4b of the printed circuit board 4, and the printed circuit board 4 is firmly positioned and fixed in the middle body 3a.

Note that the length 11 of the printed circuit board 4 is set to such a dimension that it is inscribed within the middle body 3a.

Also, the bottom part 2 of the printed circuit board 4 supported by the middle body 3a
Relay sockets 9 and 9 are fixed in parallel by soldering on the back side of the side, and relays 10 and 10 are removably attached to these sockets 9 and 9 from the bottom 2 side, respectively. relay 10
．． Socket 9 so that the head side of 10 protrudes toward the bottom 2 side.
, 9 positions are set.

In other words, when the bottom part 2 and the cover 3 of the relay 10.10 are separated, the upper part of the head side of the relay 10.10 is exposed to the outside so that it can be inserted and removed from the outside. It looks like this.

In other words, the fitting joint surfaces between the bottom part 2 and the cover 3 are provided in a plane position as if they were transverse to the relay 10.10 in its longitudinal direction.

A printed circuit board 12 on which a variable resistor 11 for adjusting the set time is attached is fixed to the inner bottom of the lid 3b, and the operating knob 11a of the variable resistor 11 is used to display power and time up. Diode 13.1
4, etc. as well as external connection terminals for instantaneous and time-limited contacts 15.16
etc. are arranged on the front surface of the lid body 3b.

And operation knob 11a and light emitting diode 13
．． 14 is a nameplate 1 fixed to the front of the lid body with screws 17
8, and the operation knob 11a allows arbitrary time settings to be made by external operation along a scale attached to the nameplate 18.

A mounting screw 19 passing through the longitudinal center of the case 1 is inserted from the front surface of the lid 3b through a sleeve 20. The bottom part 2 and the cover 3 are completely integrated by screwing them into the female threads of the parts, and as a result, a self-contained case 1 is constructed. The printed circuit boards 4 and 5 are positioned and fixed within the case 1 by abutting the outer periphery of the sleeve 20.

Note that 22 is a printed circuit board on which the above-mentioned basic circuit is mounted, and this is arranged in the longitudinal direction of the case 1, and is held in position by being sandwiched between the bottom part 2 and the lid body 3b. .

Therefore, as a result of the above configuration, when assembling the timer device of the present invention, it is necessary to comply with at least Rule 10.10.
The printed circuit board 4 for holding the
, 6b and 7a, 7b, the case 1 is positioned in the axial direction, and by integrating the bottom part 2 and the cover 3 via the mounting screws 19, the outer periphery of the sleeve 20 is aligned with the printed circuit board 4. Positioning is performed in the X direction by contacting the notch end surface 4b, and as a result, case 1
It is firmly fixed inside.

In addition, when replacing the relay 10.10 due to failure, the entire cover 3 including the basic circuit is separated from the bottom 2 by loosening the mounting screws 19 from the outside of the case, and the opening of the cover 3, that is, the bottom 2 Middle torso 3a against
The head of the relay 10.10 protrudes from the mating joint surface to the extent that it can be inserted and removed, making it extremely easy to insert and remove the relay 10
．． This means that 10 exchanges can be made.

In the embodiment described above, the outer periphery of the sleeve 20 was brought into contact with the end surface of the printed circuit board 4 for positioning. A similar effect can be obtained by forming a support hole and positioning the sleeve 20 by abutting the support hole.

As mentioned above, in the timer device according to this invention,
The upper case is divided into a lid body and a middle body, and as a means for fixing a printed circuit board to the inner peripheral part of the middle body near the fitting part with the lid body, the two sides in the thickness direction of the printed circuit board fixing position in the inner peripheral part are used. A group of protrusions for positioning the printed circuit board are formed in two stages at a distance equivalent to the thickness of the printed circuit board, and a notch corresponding to the group of protrusions is provided at the periphery of the printed circuit board. The printed circuit board is held between the projection groups by fitting the notches into the projections and sliding in a direction perpendicular to the axis of the case, and the outer periphery of the mounting screw is brought into contact with a part of the printed circuit board. Therefore, when assembling the timer device of the present invention, at least the printed circuit board for supporting the relay is placed between the protrusions provided on the inner periphery of the middle body. It is sufficient to simply insert and clamp the case, and since it is firmly positioned and fixed by the mounting screws for integrating the case, there is no need to use conventional fixing means using screws.

Further, since the printed circuit board is provided near the fitting part of the middle body with the lid, that is, on the opening side, it is extremely easy to attach and remove.

Furthermore, compared to the conventional integrated upper case, it is easier to arrange parts within the case.

Therefore, with the timer device of the present invention, the number of assembly steps can be reduced and the work can be greatly simplified.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the internal structure of the timer device according to this invention, Fig. 2 is a front view thereof, Fig. 3 is a perspective view showing the separated case of the two-part case, and Fig. 4 is a printed circuit board. Fig. 5 is an exploded perspective view showing the installed state of the , Fig. 5 is a side explanatory view thereof, Fig. 6 is a plan view thereof, Fig. 7 is a
It is a cross-sectional view taken along the line 7-7 in the figure. 1...Case, 2a...Mounting plate, 2...Bottom (bottom case), 3...
Cover (upper case), 4... Printed circuit board,
3a...middle body, 3b...lid body, 4a...
...Notch, 6 a , 6 b , 7 a , 7
b...Protrusion, 9...Relay socket, 10...Relay, 11...Variable resistor, 19...Not installed .

Claims (1)

[Scope of utility model registration request] A sealed cylinder with a mounting means for fixing it to a desired object on one end surface, an external connection terminal and an operation section for adjusting the set time on the other end surface, and a built-in desired time control circuit. a shaped case, a printed circuit board disposed within the case so as to be orthogonal to the axis of the case, a socket fixed to one side of the printed circuit board, and an axis of the case relative to the socket. The case is divided into an upper case and a bottom case provided with the mounting means from a cross section passing approximately the middle part of the relay in the axial direction, and Both of the divided cases are interconnected and integrated by a mounting screw inserted in the axial direction of the case, and the upper case is divided into two from a plane perpendicular to the axial center, and the other end is divided into two parts. It consists of a troublesome lid body and a middle body that connects the lid body and the bottom case, and the inner body is used as a means for fixing the printed circuit board to the inner peripheral part of the middle body near the fitting part with the lid body. A group of protrusions for positioning the printed circuit board are formed in two stages on both sides in the thickness direction of the fixed position of the printed circuit board at a distance equal to the thickness of the printed circuit board, and the projections are formed on the peripheral edge of the printed circuit board. A notch corresponding to the group is provided, and the notch is fitted into the protrusion group and slid in a direction perpendicular to the axis of the case, thereby sandwiching the printed circuit board between the two protrusion groups, and attaching the printed circuit board. A timer device in which a printed circuit board is positioned and fixed within the middle barrel by bringing the outer circumference of a screw into contact with a part of the printed circuit board.