JPH10340660A - Movable pointer timer - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the number of mechanical parts as much as possible and to achieve low cost. SOLUTION: A setting indicator 81 for setting a time limit by rotating a knob member 86 on a scale plate 11, and a pulse motor 4
The movable pointer 20 which can be moved from the position of the setting pointer 81 to the zero point position by the operation of the above, a zero point detection circuit 13A for detecting that the movable pointer 20 has moved to the zero point position, and a response to the zero point detection circuit 13A In a movable pointer type timer having an output circuit 14 for generating a timed output, the motor drive circuit 9 of the pulse motor 4 and the zero point detection circuit 13A and the output circuit 14 are controlled by a microcomputer, and the motor drive circuit 9 A counting circuit 8 for converting the output of the oscillation circuit 7 into a pulse corresponding to the time specification switch 8A
The zero point detection circuit 13A is driven by the output of the Hall element 24-1 and sends a signal to the output circuit 14 to drive the relay.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable pointer type timer.

[0002]

2. Description of the Related Art As a conventional movable pointer type timer, FIG.
As shown in FIG. 8, a clutch 200 is provided.
02A, and a driven clutch wheel 204 fixed to the driven shaft 203 side and having a meshing tooth portion 204A.
An input gear 208 meshing with a gear 207 at the last stage of the speed reducer 206 is fixed to 1. A drive shaft 201 has a meshing tooth portion of a driving clutch wheel 202 and a driven clutch wheel 204 on a lower side thereof. Zero-point detection microswitch 2 for controlling engagement and separation of 202A and 204A
A clutch coil 220 is provided that responds to the output of C.09.

The speed reducer 206 is provided on the output side of a synchronous motor 222 that rotates at a constant speed synchronized with a commercial power supply.
This is for adjusting the rotation speed. That is, since the rotation speed of the synchronous motor 222 is constant, the speed reducer 206 is used to adjust the moving speed of the movable pointer 221.
Is composed of a combination of several gears whose number of teeth and the like corresponding to the adjustment are adjusted.

The upper end of the driven shaft 203 has a scale plate 2
23, and the movable pointer 221 is fixed to the penetrating end. The setting pointer 224 is mounted on the scale plate 223 in relation to the driven shaft 203 so as to stop at the set time limit position and to function as a stopper of the movable pointer 221. The driven shaft 203 has a return spring 225 and a contact pressing lever 22.
6 are provided.

[0005] The return spring 225 is driven by the driven shaft 20.
2 rotates the movable pointer 221 in the direction of the zero point, ie, in FIG.
When it moves in the counterclockwise direction at 8, its restoring force is accumulated. Also, the contact pressing lever 2
26 operates the zero point detection microswitch 209 when the movable pointer 221 reaches the zero point position.
The contact can be pressed.

First, with the start of the timer operation, the synchronous motor 222 starts rotating at a constant speed synchronized with the frequency of the commercial power supply. Accordingly, the synchronous motor 222 rotates the drive shaft 201 at a reduced speed by the speed reducer 206. The contact of the zero point detection microswitch 209 is not pressed by the contact pressing lever 226, so that the clutch coil 220 is not energized.

Therefore, the driven shaft 203 and the drive shaft 201
Is connected via the clutch 200, so that the driven shaft 203 is rotated in conjunction with the rotation of the drive shaft 201. Thereby, the movable pointer 221 moves on the scale plate 223 from the set time limit position of the setting pointer 224 toward the zero point position.

When the movable pointer 221 reaches the zero point simultaneously with the elapse of the set time limit, the contact pressing lever 226 presses the contact of the micro switch 209 for zero point detection, and the clutch coil 220 is energized. As a result, the clutch coil 220 pulls down the driven shaft 203 so as to disengage the clutch 200, and releases the connection between the driven shaft 203 and the drive shaft 201. As a result, the driven shaft 203
Is rotated by the restoring force of the return spring 225, and the movable pointer 221 is returned to the scale position of the setting pointer 224.

When the movable pointer 221 is returned to the scale position of the setting pointer 224, the contact pressing lever 226 separates from the contact point of the zero point detecting microswitch 209.
Therefore, the power is not supplied to the clutch coil 220 and the clutch 200 is reengaged, and the driven shaft 203 and the drive shaft 201 are connected via the clutch 200.

[0010]

However, in the above-mentioned conventional movable pointer type timer, the clutch comprises a driving clutch wheel 202 having a meshing tooth portion 202A,
Driven clutch wheel 20 having meshing tooth portion 204A
4 and the drive-side clutch wheel 2
02 and a clutch coil 220 responsive to the output of the zero point detection microswitch 209 to control the coupling and disengagement of the driven clutch wheel 204 with the driven clutch wheel 204.
Synchronous motor 22 that rotates at a constant speed synchronized with commercial power
2 and reducer 20 to adjust this rotational speed.
The structure is composed entirely of mechanical parts, such as the use of 6, and the structure is complicated, requiring labor for mold maintenance, parts management, and dimensional maintenance. There is a problem that the timer becomes large.

In addition, a real worker using a timer often works while watching the passage of time, and a small general-purpose machine for food using a timer is often used by an elderly real worker. For this reason, a movable pointer type timer having better visibility and operability has been reconsidered as compared with a digital timer which requires much time to set by an up / down key.

The present invention has been made in view of the above problems, and has as its object to reduce the number of mechanical parts as much as possible, simplify the configuration, and maintain the mold. It is an object of the present invention to provide a movable pointer type timer that not only achieves low cost without labor for parts management and dimension maintenance but also has better visibility and operability as compared with a digital timer. .

[0013]

In order to achieve the above object, a movable pointer type timer according to the first aspect of the present invention comprises a setting pointer for setting a time limit by rotating a knob on a scale plate; A movable pointer movable between the position of the setting pointer and the zero point by the operation of the motor, a zero point detection circuit for detecting that the movable pointer has moved to the zero point position, and a timed output in response to the zero point detection circuit. In a movable pointer type timer having an output circuit for generating, a motor drive circuit of the pulse motor, the zero point detection circuit and the output circuit are controlled by a microcomputer.

With this configuration, the motor drive circuit of the pulse motor, the zero point detection circuit, and the output circuit are controlled by the microcomputer, so that the number of mechanical parts can be reduced as much as possible. It can achieve low cost without labor for parts management and dimension maintenance, as well as better visibility and operability compared to digital timers that require more time to set up and down keys. Become.

Further, by using a pulse motor as a driving source and using a power supply circuit as a power supply of the pulse motor, the inside can be converted to a DC, a free voltage and 50/6
The timer can be used without the division of 0HZ. For this reason, the series of voltage specifications can be reduced, inventory management is facilitated, and time specifications are not affected by the commercial frequency.

According to a second aspect of the present invention, there is provided a movable pointer type timer according to the first aspect, wherein the motor driving circuit comprises:
It is driven by the output of a counting circuit that converts the output of the oscillation circuit into a pulse corresponding to the time specification switching means.

According to this configuration, not only the same operation and effect as the above-described first embodiment are obtained, but also the output of the oscillation circuit is driven by the output of the counting circuit which converts the output of the oscillation circuit into a pulse corresponding to the time specification switching means. Thus, the pulse motor can be driven according to the time specification.

According to a third aspect of the present invention, there is provided a movable pointer type timer according to the first or second aspect, wherein the zero point detecting circuit comprises a hall. In addition to being driven by the output of the element, a signal is sent to the output circuit to drive the relay.

With this configuration, it is possible to not only have the same operation and effect as the above-described first embodiment, but also to easily detect the zero point and to send a signal to the output circuit to drive the relay.

According to a fourth aspect of the present invention, there is provided a movable pointer type timer according to the first or second or third aspect of the present invention. The motor control circuit, the pulse motor, and the zero point detection circuit are mounted on a board and assembled to a main frame, the main frame is fixed to a case, and a timer body is fixed to the main frame to a mounting member. A timer mounting member is provided.

According to this configuration, the power supply circuit, the motor control circuit, the pulse motor, and the zero point detection circuit are provided in a case, in addition to having the same operation and effects as those of the first aspect of the present invention. Can be stored compactly, the assemblability becomes good, and when the movable pointer type timer is mounted on a mounting member using a timer mounting member, for example, the power supply circuit and the The weight of the motor control circuit, the pulse motor, and the zero point detection circuit are all added to and supported by the mounting member via the main frame, and the weight is not added to the case. Can be small,
The movable pointer type timer itself can be reduced in size and weight.

According to a fifth aspect of the present invention, there is provided a movable pointer type timer according to the fourth aspect of the present invention, wherein a time specification is displayed from a display window of a scale plate. The switching of the time specifications is performed from outside the case.

According to this configuration, not only the same operation and effect as the above-described fourth embodiment, but also the switching of the time specification can be performed from outside the case.
Time specifications can be easily switched.

According to a sixth aspect of the present invention, there is provided a movable pointer type timer according to the first or second or third or fourth or fourth or fifth or fifth aspect. A timer for transmitting the rotation of the pulse motor to a movable pointer, a driving gear rotatably driven by a driving source and having one meshing tooth, and a driving gear. And a driven gear having the other meshing tooth portion, which is detachably attached to and separated from the driven gear, and biasing the driving side gear toward the driven gear side so that the one meshing tooth portion meshes with the other meshing portion. A gear return spring that meshes with the toothed portion and couples the drive side gear to the driven side gear; and an electromagnet. When the electromagnet is turned on, the drive side gear is moved against the gear return spring. The drive side gear and the It is constituted by a clutch actuator for releasing the coupling of the side gears.

With this configuration, not only can the same operation and effect as those of the first aspect of the invention be obtained, but also the clutch actuator does not operate when the electromagnet of the clutch actuator is not energized. The driving gear is urged toward the driven gear by the spring urging force of the gear return spring, and the one meshing tooth meshes with the other meshing tooth, and the clutch is turned on. In this state, the driving gear is connected to the driven gear. Therefore, when the driving gear is rotationally driven by the pulse motor, this rotation is transmitted to the driven gear via one and the other meshing teeth and output.

When the electromagnet of the clutch actuator is energized, the clutch actuator is actuated to move the drive gear against the gear return spring so that the clutch is off, and the drive gear is disengaged. The coupling between the gear and the driven gear is released. For this reason, even if the driving gear is rotationally driven by the pulse motor, this rotation is not transmitted to the driven gear and is not output.

According to a seventh aspect of the present invention, there is provided a movable pointer type timer according to the first or second or third or fourth or fourth or fifth or fifth aspect. The mold timer has clutch means for transmitting the rotation of the pulse motor to a movable pointer. The clutch means is driven by the pulse motor and has a driving gear having one meshing tooth portion; A driven gear that is arranged to be detachable from the gear and that has the other meshing tooth portion; and a drive gear that is biased toward the driven gear side to cause the one meshing tooth portion to move to the other gear. Gear biasing means for engaging the driving gear with the driven gear by meshing with a meshing tooth portion, and biasing releasing means for releasing the connection between the driving gear and the driven gear; Gear biasing means having an electromagnet When the electromagnet is turned on, the drive side gear is urged toward the driven side gear side so that the one meshing tooth portion meshes with the other meshing tooth portion, and the drive side gear becomes the driven side gear. A clutch actuator for coupling, wherein the urging release means urges the driving gear in a direction away from the driven gear when the electromagnet of the clutch actuator is demagnetized, and It is constituted by a gear return spring that releases the connection with the driven gear.

With this configuration, it is possible to obtain not only the same operation and effect as those of the first aspect of the present invention, but also to energize the electromagnet of the clutch actuator to operate the clutch actuator. The drive side gear is urged toward the driven side gear side, the one meshing tooth portion meshes with the other meshing tooth portion, the clutch is turned on, and the driving side gear is It is connected to the driven gear. Therefore, when the drive-side gear is rotationally driven by the drive source, this rotation is transmitted to the driven-side gear via one and the other meshing teeth and output.

Further, when the energization of the electromagnet of the clutch actuator is cut off, the operation of the clutch actuator is stopped. Therefore, the gear return spring moves the drive side gear, and the clutch is turned off, so that the clutch is turned off. The coupling between the driving gear and the driven gear is released. For this reason, even if the driving gear is rotationally driven by the pulse motor, this rotation is not transmitted to the driven gear and is not output.

As described above, a clutch capable of saving space and cost can be provided by using a clutch actuator for coupling operation between the driving side gear and the driven side gear and using a gear return spring for releasing the coupling. The self-return type movable pointer type timer used can be realized.

In order to achieve the above object, a movable pointer type timer according to the invention of claim 8 is the movable pointer type timer according to claim 3, wherein the relay driven by the output circuit has a timed fixed output. It is an electrical reset type that is a relay.

With this configuration, it is possible to provide not only the same operation and effect as the above-described third embodiment, but also to provide a movable pointer type timer of an electric reset type.

According to a ninth aspect of the present invention, there is provided a movable pointer type timer according to the third aspect of the present invention, wherein the relay driven by the output circuit is a fixed time output. A self-return type, which is a relay and a time / instantaneous switching output relay, and wherein the switching of the time / instantaneous switching output relay is performed by switching means.

With this configuration, it is possible to provide not only the same operation and effect as the above-described third embodiment, but also to provide a self-return type movable pointer type timer.

According to a tenth aspect of the present invention, there is provided a movable pointer type timer according to the ninth aspect, wherein the switching means is operated from outside the case. This is a slide switch configuration.

With this configuration, not only can the same operation as the above-described invention of claim 9 be achieved, but also the time-limited / instantaneous switching output relay is switched by operating the slide switch from outside the case. be able to.

[0037]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A movable pointer type timer according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 22 show Embodiment 1 of a movable pointer type timer according to the present invention. The movable pointer type timer according to the present invention is a motor timer, and its block configuration includes a terminal block 1, a power supply circuit 2 connected to the output side of the terminal block 1, A control circuit 3 connected to the output side of the circuit 2, a pulse motor (stepping motor) 4 controlled by the control circuit 3, and a clutch connected to the output side of the pulse motor 4 via a reduction gear train 10; Means 5, a display unit 6 provided on the output side of the clutch means 5, an output circuit 14 provided on the output side of the control circuit (microcomputer) 3, and a detecting means 13 for controlling the clutch means 5. It is composed.

More specifically, in the movable pointer type timer T using the electric reset type clutch K as the clutch means 5, as shown in FIG.
An input side of the power supply circuit 2 is connected to the terminal and the second terminal, and an output side of the power supply circuit 2 is connected to an input side of an oscillation circuit (oscillation means) 7 in the control circuit 3. The output of the circuit 7 is connected to the input of a counting circuit 8.
The output side of a time specification changeover switch (time specification changeover means) 8A is connected to the counting circuit 8. This counting circuit 8
Is connected to the input side of the motor drive circuit 9.

The drive side of the clutch K is connected to the output side of the pulse motor 4 driven by the motor drive circuit 9 via a reduction gear train 10, and the driven side of the clutch K is connected to the movable portion of the display unit 6. The pointer 12 is connected. And
The clutch K is provided with an intermittent operation part (not shown),
The drive power for the intermittent operation unit is supplied from the output side of the clutch power supply circuit 2-1 having a configuration different from that of the power supply circuit 2.

The display section 6 is provided with a zero point detecting circuit 13A as detecting means 13, and an output circuit 14 is connected to the output side of the zero point detecting circuit 13A.
Is connected to the input side of the timed fixed output relay 15. A display circuit 17 is provided on the output side of the output circuit 14.
The output side of the display circuit 17 is connected to a power display section 18 and a time-up display section 19. The input side of the instantaneous output relay 16 is connected to the output side of the clutch power supply circuit 2-1. In addition, 20
Is a setting guideline (fixed guideline).

The timed fixed output relay 15 is connected to the terminal block 1.
, And the instantaneous output relay 16 is connected to the sixth, seventh, and eighth terminals of the terminal block 71. The power supply circuit 2 is connected to the first and second terminals of the terminal block 1, and the clutch power supply circuit 2-1 is connected to the ninth and tenth terminals of the terminal block 1.

That is, according to the present invention, the setting pointer 81 for setting the time limit by rotating the knob 86 on the scale plate 11 is provided.
A movable pointer 20 movable from the position of the setting pointer 81 to the zero point by the operation of the pulse motor 4;
It has a zero point detection circuit 13A for detecting that 0 has moved to the zero point position, and an output circuit 14 for generating a timed output in response to the zero point detection circuit 13A. The motor drive circuit 9 of the pulse motor 4 and the zero point detection Circuit 13A and output circuit 14
And are controlled by a microcomputer.

Then, the motor driving circuit 9 includes the oscillation circuit 7
Is driven by the output of the counting circuit 8 which converts the output of the counter 8 into a pulse corresponding to the time specification changeover switch 8A. The zero point detection circuit 13A is driven by the output of the Hall element 24-1 such as the Hall 1C. A signal is sent to the output circuit 13A to drive the timed fixed output relay 15.

The movable pointer type timer T of the electric reset type is
As shown in FIG. 3, a case 21 is provided. The case 21 has a substantially cylindrical case main body 21A as shown in FIGS. 6 and 7, and a square-shaped case main body 21A is provided on the front surface of the case main body 21A. A window frame portion 22 is formed, and a terminal block forming portion 21B is formed at a rear portion of the case main body 21A. In addition, a time specification switching mechanism mounting portion 23 and a slide switch operation hole portion 29 are formed in a lower portion of the case main body 21A. An operation hole 30 is formed in the time specification switching mechanism mounting portion 23.

On the front surface of the window frame portion 22, an engagement groove portion 24 having a front annular shape, a groove portion 25 having a front square frame shape, and a packing mounting portion 26 are formed from the inside to the outside. A plurality of locking projections 27 are provided on the outer peripheral surface of the window frame 22. Further, bolt insertion holes 28 are formed at the four corners of the window frame 22 as shown in FIGS. 6 (2) and 7 (3).

The main frame 31 has a rectangular plate-shaped frame main body 31A as shown in FIG. 8, and the four corners of the frame main body 31A are provided with (1) in FIG. As shown in (4), a bolt hole 32 is formed, and a hole 33 is provided in the center of the frame main body 31A, and windows 34, 34A and 34B are provided in the lower part thereof. Board mounting legs 35 are provided at four locations on the back surface of 31A. An annular engaging projection 36 centered on the hole 33 and a pair of mounting bosses 37 are formed on the back surface of the frame main body 31A.

Then, the engaging projection 36 is connected to the window frame 22.
The main frame 31 is provided on the front surface of the case 21 by engaging with the engagement groove 24. In this case, the bolt holes 32
And the bolt insertion holes 28 coincide with each other. As shown in FIG. 2, a mounting bolt 32-1 made of a hexagonal bolt as a timer mounting connecting member is inserted and locked in the bolt hole 32. The mounting bolt 32-1 is inserted into the bolt insertion hole 18 as shown in FIG.
Penetrates and projects rearward. The scale plate 11 is provided on the front surface of the main frame 31. Display windows 11A, 11B and 11C are provided below the scale plate 11.

The main frame 31 uses the mounting boss 37 to reduce the speed of the gear train 10, the electric return type clutch K, the pulse motor 4, the control circuit (motor drive circuit 9 and the like) 3, and the time specification. An assembly of the switching mechanism 39 is mounted.

As shown in FIG. 9, the electric reset type clutch K is rotated by a pulse motor 4 as a driving source and has a clutch wheel gear 100 as a driving gear having one meshing tooth portion 100A. A clutch pinion gear 101, which is a driven gear having the other meshing tooth portion 101A, which is disposed so as to be able to be separated from and connected to the clutch wheel gear 100, and one of the clutch wheel gears 100 which is urged toward the clutch pinion gear 101 side. The meshing tooth portion 100A is meshed with the other meshing tooth portion 101A to shift the clutch wheel gear 100 to the clutch pinion gear 1.
The clutch wheel gear 100 is coupled to the clutch pinion gear 101 by moving the clutch wheel gear 100 against the gear return spring 102 by turning on the electromagnet 103. Release of clutch actuator 10
4 is roughly constituted.

When the clutch K is not energized to the electromagnet 103 of the clutch actuator 104,
The clutch actuator 104 is not operated, and the clutch wheel gear 100 is urged toward the clutch pinion gear 101 by the spring urging force of the gear return spring 102, so that one meshing tooth portion 100A becomes the other meshing tooth. The clutch wheel gear 100 is engaged with the clutch pinion gear 101 in the clutch-on state. Accordingly, when the clutch wheel gear 100 is rotationally driven by the pulse motor 4 as a driving source, this rotation is caused by the rotation of the one and the other meshing tooth portions 1.
00A, 101A via the clutch pinion gear 101
Is transmitted to and output.

The clutch actuator 104
When the electromagnet 103 is energized, the clutch actuator 104 operates, and the clutch wheel gear 10
0 is moved against the gear return spring 102 to be in a clutch-off state.
00 and the clutch pinion gear 101 are released. For this reason, even if the clutch wheel gear 100 is rotationally driven by the pulse motor 4, this rotation is not transmitted to the clutch pinion gear 101 and is not output.

The shaft 240 of the output gear 210 connected to the clutch pinion gear 101 projects forward through the central hole 33 of the main frame 31 and the central hole 11D of the scale plate 11. The movable pointer 20 is attached to the support shaft 240 of the output gear 210. As shown in FIG. 12, the movable pointer 20 is provided with a hooking projection 20a and a zero magnet 20b.

Further, the control circuit 3 is provided with (1) in FIG.
As shown in (2), first to sixth substrates 40 to 45 are provided, and the first substrate 40 has the motor drive circuit 9 of the pulse motor 7 mounted thereon, and the second and third substrates 41, 45. An oscillation circuit 7, a counting circuit 8 and the like are mounted on 42.
3, a power supply circuit 2 and the like are mounted, and a fifth substrate 44 is mounted with a clutch power supply circuit 2-1 and the like.
The sixth substrate 45 is provided on the front surface of the case of the clutch K, and the sixth substrate 45 has a Hall element 24-1 and the like mounted thereon.

The time specification switching mechanism 39 includes a switching rotary member 46, a switching intermediate member 47, and a switching display member 48.
And a switching press cover 49. The switching rotating member 36 includes an engaging leg 50 protruding from the center of the rear surface thereof as shown in FIGS. Part 50
And a plurality of locking claws 51 located on a circle centered at the center, and a cross-shaped driver insertion groove 52 is formed on the surface. A seal 62 is attached to the surface, and the seal 62 is divided into five equal parts in the circumferential direction.
Characters such as minutes and hours are displayed.

The switching display member 48 has a cylindrical member body 48A as shown in FIGS. 14A to 14D, and an engagement groove 53 is formed on the surface of the member body 48A.
A support shaft 54 is provided at the center of the rear surface of the member main body 48A, and a gear portion 55 is formed on the outer peripheral portion of the member main body 48A toward the rear surface side. Also,
The outer circumferential portion of the member main body 48A has a circumferential direction of 5
A positioning groove 56 is formed at an equally dividing position, and a seal 57 is attached to an outer peripheral portion of the member main body 48A. The seal 57 is equally divided into five in the circumferential direction.
Characters such as seconds, minutes, and hours are displayed. Further, conductive sliders 96a, 96b, 96c are attached to the back surface of the switching display member 48, as shown in FIG.

The switching intermediate member 47 includes a seal 57.
It has the same configuration as the switching display member 48 except for the sliders 96a, 96b, and 96c.

As shown in FIGS. 15 (1) to (5), the switching press cover 49 has a flat cover body 49A.
A locking leg 58 having a locking claw 58a is provided on both sides and one end of the cover main body 49A, and a circular hole 59 is provided on one end side of the surface of the cover main body 49A. It is formed together. Further, a cantilever-shaped positioning hook 60 is provided on the surface of the cover main body 49A so as to approach the other end.

The switching display member 48 and the switching intermediate member 47 are connected to the respective support shafts 54 by the fifth substrate 44.
The switching display member 48 and the switching intermediate member 47 mesh with each other in the gear portion 55. Further, the sliders 96a, 96 on the back surface of the switching
b and 96c are in sliding contact with a switching pattern (not shown) mounted on the fifth substrate 44.

The switching press cover 49 has its locking leg 58 locked in a locking hole (not shown) provided in the fifth substrate 44 and attached to the fifth substrate 44. Thus, the switching display member 48 and the switching intermediate member 47 are rotatably held. In this case, the positioning hook 6
0 is locked in the positioning groove 56.

The operation hole 30 of the time specification switching mechanism mounting portion 33 provided in the case 21 is
The engaging portion 50 of the switching rotating member 46 and the plurality of locking claws 51 are inserted, and the locking claw 51 is slidably hooked on the edge of the operation hole 30. The part 50 is engaged with the engagement groove 53 of the switching intermediate member 47.

When the switching rotary member 46 is rotated, the switching intermediate member 47 is rotated, and the switching display member 4 meshed with the switching intermediate member 47 by the gear 55.
8 rotates. Therefore, in the switching rotating member 46, when the character (min) displayed on this surface is matched with the triangular mark 63 provided on the outer surface of the time specification switching mechanism mounting portion 33 of the case 21, the switching display member 48 is displayed. Is displayed on the display window 32A below the scale plate 32. In this case, the position fixing locking piece 60 is locked in the positioning groove portion 56 corresponding to the position of the minute character.

A front cover 65 is attached to the front of the window frame 22 of the case 21 by a side cover 75. That is, as shown in FIGS. 16A to 16D, the front cover 65 has a rectangular cover body 65.
A, a peripheral wall 66 is formed on the periphery of the cover body 65A, and a flange 67 is formed on the outer peripheral surface of the peripheral wall 66. Surrounding wall 66
A seal mounting portion 69 is constituted by a portion 68 on the outer peripheral surface of the outer peripheral surface of the flange 67 and the front side. Further, a groove is formed in the inner peripheral surface of the peripheral wall portion 66 in the circumferential direction, and a front portion 68 is thinned, and this portion serves as an insertion protrusion 70.

A circular hole 71 and a boss 72 centered on the circular hole 71 are provided at the center of the cover body 65A. A mounting portion 73 is formed. An annular washer receiving portion 74 is formed at the center of the cover body 65A so as to be located outside the boss portion 72. A projection 74A is formed on the inner surface of the cover body 65A.

The side cover 75 is formed as shown in FIG.
As shown in (4), a cover body 75A having a rectangular frame shape having an opening 77 in the center is provided.
A peripheral wall 76 is formed in the peripheral portion of A, and a plurality of locking holes 77A are formed in the peripheral wall 76 at predetermined intervals in the circumferential direction. Further, a portion of the peripheral wall portion 76 on the opening 77 side is curved, and a plurality of ribs 79 are formed on the inner surface of the curved portion 78 at predetermined intervals in the circumferential direction. The end is a holding portion 80.

The setting pointer 81 is shown in (1) of FIG.
As shown in (4) to (4), the base portion has a boss portion 82, the boss portion 82 has a mounting hole 83 formed therein, and the base portion of the pointer portion 84 has an interference protrusion 85 Is formed.

Further, the knob 86 is provided with the components (1) to (1) in FIG.
As shown in (3), a screw hole 87 is formed in the center of the back surface 86a.
In addition, a circular sliding contact groove 88 centering on the screw hole 87 is formed on the back surface 86a.

A washer 90 having a wavy surface is provided on the washer receiving portion 74 of the front cover 65, and
5 with the packing 89 mounted on the packing mounting portion 73 of the boss portion 72, the boss portion 72 is inserted into the sliding contact groove portion 88 of the knob member 86, and the boss portion 82 of the setting pointer 81 is inserted into the circular hole 71 from behind. Into the mounting hole 83 of the setting pointer 81.
, The mounting bolt 91 is screwed into the screw hole 87 of the knob 86, and the knob 86 and the setting pointer 81 are rotatably mounted on the front cover 65 by tightening the mounting bolt 91. It is.

In this case, the washer 90 contacts the back surface 86a of the knob member 86, and the torque of the setting pointer 81 is properly adjusted. In addition, since the packing 89 is held in a DE that does not receive a compressive force in the axial direction, the packing 89 does not spread in the radial direction, and the packing 89 is pressed against the sliding contact groove 8 with an appropriate surface pressure.
8 is in sliding contact with the outer peripheral surface.

Then, a rectangular frame-shaped sealing member 81 is mounted on the seal mounting portion 69 of the front cover 65, and the insertion projection 70 of the front cover 65 is inserted into the groove 25 of the window frame 22 of the case 21. , A side cover 75 is put on the periphery of the front cover 65,
Is pressed against the case 21 side, the flange portion 67 is pressed by the pressing portion 80 of the rib 79, and the sealing member 81 is compressed by the flange portion 67 and the packing mounting portion 26. In this state, the side cover 75
The locking holes 77 of the window frame portion 22
To the front cover 65 on the front of the case 21.
Are attached by the side cover 75.

As shown in FIG. 20, a pulse motor (stepping motor) 4 which is a driving source of the clutch K has an annular rotor 106 formed into a gear shape, and
06 and is substantially constituted by a gear-shaped stator 108 opposed to the rotor 106.

The pulse motor 4 utilizes the rotating force generated by attracting the salient poles of the rotor 106 by the attractive force of the electromagnet. Therefore, this pulse motor 4
No holding torque is generated when not excited. The step angle is
For example, 8 degrees. The excitation coil 107 is wound around each of the six salient poles of the stator 108 of the pulse motor 4 according to the embodiment. The rotor 106 has eight salient poles 106A.

FIG. 21 shows a drive control section (control circuit 3) of the pulse motor 4. The drive control unit includes an oscillation circuit 7 for generating a pulse, a time specification changeover switch 8A as time specification changeover means serving as a time specification setting circuit for outputting a time setting output corresponding to the time setting of the timer, and a time specification changeover switch. Counting circuit 8 that generates drive signals S1, S2, S3 in response to clock pulse CP based on clock pulse CP having a frequency corresponding to the time specification setting from switch 8A.
And the first, second, and third motor drive transistors Tr1, Tr that are turned on by the drive signals S1, S2, S3.
2, and a motor drive circuit 9 comprising Tr3.

In such a drive control unit, the counting circuit 8 responds to the clock pulse CP to generate the drive signal S.
1, S2, and S3 are sequentially output, and the driving signals S1, S2
2, S3 are given to the respective bases of the corresponding first, second, and third motor drive transistors Tr1, Tr2, Tr3. The first, second, and third motor drive transistors Tr1, Tr2, Tr3 provide drive signals S1, S2,
An ON operation is performed in response to S3, and a current flows through the exciting coils N1 +, N1-; N2 +, N2-; N3 +, N3- of the stator 108, and the pulse motor 4 is rotated by receiving a starting force.

In this case, the exciting coils N1 + and N1- (first
Motor drive transistor Tr1 side), the excitation coil N2
+ And N2- (second motor drive transistor Tr2
), And the excitation coils N3 + and N3- (the third motor drive transistor Tr3 side) are connected in series with each other.

The counting circuit 8 includes a Hall element 24
The output of the drive signal is stopped in response to the input of the zero point detection signal from -1. By this stop, the pulse motor 4 stops its rotation, becomes a non-excited state, and becomes a state where there is no holding torque. The Hall element 24 and the zero magnet 20b constitute the detecting means 13A. The detection means 13A may be constituted by a photo sensor, an encoder, a leaf switch, and the like.

The movable pointer type timer T constructed as described above is provided with a waterproof packing 111 between the mounting plate 110 and the rear surface of the window frame 22 of the case 21 as shown in FIG.
Is attached to the mounting plate 110 with the timer mounting bolt 32-1.

In this case, the mounting bolt 32-1 projecting from the rear surface of the window frame 22 of the case 21 is attached to the mounting plate 1
10 into a hole (not shown) provided in
This is performed by attaching a nut (not shown) to 2-1 and tightening the nut. Therefore, the weights of the power supply circuit 2, the motor control circuit 9, the pulse motor 4 and the clutch K are all attached to the mounting plate 11 via the main frame 31.
Since the weight is not added to the case 21 because it is supported by the case 21, the thickness of the case 21 can be reduced, and the movable pointer type timer T itself can be reduced in size and weight. it can. The mounting plate 110 is provided with a window 110A for switching time specifications.

Next, the operation of the movable pointer type timer T having the above-described structure and using the electric reset type clutch K will be described. With the setting pointer 81 and the movable pointer 20 overlapping each other and pointing to 0 on the scale display, the knob 86 is pinched with a finger and the setting pointer 81 is rotated by twisting the knob 86. When it is moved to a predetermined time, for example, a position of 30 seconds (the scale display is at a position of 30), the rotating mechanism provided on the setting pointer 81, that is, the interference part 85 of the setting pointer 81 is hooked on the movable pointer 20. The movable indicator 20 moves together with the setting indicator 81 by interfering with the setting projection 20a, and the scale display is positioned at 30.

As described above, by operating the setting pointer 81 and the movable pointer 20 in accordance with the set time period, data of a required time period corresponding to the set time period is given to the control circuit 3. From the control circuit (time specification changeover switch 8A) 3,
A setting signal corresponding to this operation is supplied to the counting circuit 8.

The counting circuit 8 responds to the input of the clock pulse CP set to the frequency corresponding to the required time as described above, and outputs the driving signals S1, S2, S3 to the first, second, and third, respectively. Motor drive transistors Tr1, Tr
2, sequentially output to Tr3. Thus, the exciting coils N1 +, N1-; N2 +, N2-; N3 +, N3 wound around the salient poles of the stator 108 of the pulse motor 4
−, The rotor 106 of the pulse motor 4 rotates, and this rotation causes the motor pinion 120 to rotate.
The clutch wheel gear 100 meshing with the motor pinion 120 rotates, the clutch pinion gear 101 rotates via meshing tooth portions 100A and 101A meshing with each other, and the output gear 210 meshing with the clutch pinion gear 101 rotates. I do.

With the rotation of the output gear 210, the movable pointer 20 attached to the support shaft 240 of the output gear 210 starts to move from the set time limit position (the position of the time display 30) toward the zero point position. , Pointer return spring 121
Is also involved and accumulates restoring energy.
The movable pointer 20 moves in accordance with the rotation speed of the pulse motor 4. In this case, the movable pointer 20 moves between the set time limit position and the zero point position with a time corresponding to the time limit.

When the movable pointer 20 reaches the zero point position, the zero magnet 20
As a result of b coming to a position facing the Hall element 24-1, the Hall element 24-1 outputs a zero point position detection signal to the control circuit (counting circuit 8) 3. The counting circuit 8 responds to the input of the zero point detection signal by driving signals S1, S2, S3.
Therefore, the pulse motor 4 is de-energized at the same time when the movable pointer 20 reaches the zero point position, and the holding torque is lost.

At the same time when the movable pointer 20 reaches the zero point, the electromagnet 103 of the clutch actuator 104 is energized. For this reason, the movable lever 104A of the clutch actuator 104 is operated, and FIG.
As shown in FIG. 1, the clutch wheel gear 100 is pushed down, and the gear return spring 102 is compressed. For this reason, the meshing tooth portion 10 of the clutch wheel gear 100
0A is the meshing tooth portion 101 of the clutch pinion gear 101
A is separated from A and the meshing is released.

Therefore, the output gear 210 is rotated by the restoring force of the pointer return spring 121, and the movable pointer 20 moves to the setting pointer 81. Since the setting pointer 81 also functions as a stopper for the movable pointer 20, the movable pointer 20 stops at the position of the setting pointer 81.

When the movable pointer 20 moves to the position of the setting pointer 81, the zero magnet 20b is
Since the control circuit (counting circuit 8) 3 no longer receives the zero point position detection signal from the Hall element 24-1, the counting circuit 8 again drives the driving signals S1, S2, and S3. To drive the pulse motor 4.

At the same time, the energization of the electromagnet 103 of the clutch actuator 104 is cut off, the movable lever 104A of the clutch actuator 104 is in a no-load state, and the urging force of the gear return spring 102 causes the clutch wheel gear 100 Is pushed up,
The meshing tooth portion 100A of the clutch wheel gear 100
Meshes with the meshing tooth portion 101A of the clutch pinion gear 101.

Therefore, when the pulse motor 4 is driven, the motor pinion 120 rotates, and the clutch wheel gear 100 meshing with the motor pinion 120 rotates, and the meshing teeth 10 meshing with each other rotate.
The clutch pinion gear 101 rotates through 0A and 101A, the output gear 210 rotates, the movable pointer 20 starts moving from the set time limit position (the position of the time display 30) to the zero point position, and the pointer return spring 121 Is also involved and accumulates restoring energy.

The operation chart of the movable pointer type timer T using the electric reset type clutch K is as shown in FIG. In FIG. 22, t is a set time, Rt is a reset time, and t 'is a power outage time. In addition, in a state where the electromagnet 103 of the clutch actuator 104 is not energized, the clutch is turned on by the spring biasing force of the gear return spring 102. Starts from the middle of the process, and the pointer is held.

(Embodiment 2) FIGS. 23 to 27 show Embodiment 2 of the present invention. In the second embodiment, a movable pointer type timer T-1 using a self-return type clutch K-1 will be described.

This movable pointer type timer T-1 is different from the above movable pointer type timer T in that the electrical reset type clutch K is changed to a self-return type clutch K-1, and a timed / instantaneous switching output relay 86-1. And a slide switch 86-2 as switching means for the timed / instantaneous switching output relay 86-1. Since the other components are substantially the same as those of the movable pointer type timer T, they are denoted by the same reference numerals. The description is omitted.

The clutch K-1 of the movable pointer type timer T-1 can be mounted on the gear return spring 102 and the clutch actuator 104 without changing the components of the electric return type clutch K. Can be realized by changing

The self-return type clutch K-1
The mounting position of the gear return spring 102 in FIG.
Is between the clutch wheel gear 100 and the clutch pinion gear 101 as shown in FIG.

Therefore, by energizing the electromagnet 103 of the clutch actuator 104 as the gear urging means and operating the clutch actuator 104,
The clutch wheel gear 100 is urged toward the clutch pinion gear 101 so that one meshing tooth portion 100A meshes with the other meshing tooth portion 101A, and the clutch wheel gear 100 is in a clutch-on state, and the clutch wheel gear 100 It is connected to a pinion gear 101. Accordingly, when the clutch wheel gear 100 is rotationally driven by the pulse motor 4, this rotation is caused by one and the other of the meshing tooth portions 100.
A and 101A are transmitted to the clutch pinion gear 101 and output.

When the power supply to the electromagnet 103 of the clutch actuator 104 is cut off, the operation of the clutch actuator 104 is stopped, so that the clutch wheel gear 100 is disengaged.
Is moved to the clutch off state, and the connection between the clutch wheel gear 100 and the clutch pinion gear 101 is released. For this reason, even if the clutch wheel gear 100 is rotationally driven by the pulse motor 4, this rotation is not transmitted to the clutch pinion gear 101 and is not output.

The self-return type clutch K-1
23, the output side of the output circuit 14 has an input side of a fixed time fixed output relay 15 and a time limit / instantaneous switching output relay 86-1 as shown in FIG.
The input side of the output circuit 14 is connected to a slide switch 86-2 as a switching means of a timed / instantaneous switching output relay 86-1.

Further, in the movable pointer type timer T-1, as shown in FIG.
The slide switch 86-2 as the first switching means is the fifth switch.
The slide switch 86-mounted on the substrate 44
The second operation unit 86-3 protrudes outward from the operation hole 29. Therefore, by operating the operation unit 86-3, the slide switch 86-2 can be operated to switch to the time limit / instantaneous switching output relay 86-1.

Next, the operation of the movable pointer type timer T-1 constructed as described above will be described. In a state where the electromagnet 103 of the clutch actuator 104 is energized, as shown in FIG.
The movable lever 104A operates to push up the clutch wheel gear 100 and compress the gear return spring 102. Therefore, the meshing tooth portion 100A of the clutch wheel gear 100 meshes with the meshing tooth portion 101A of the clutch pinion gear 101.

With the setting pointer 81 and the movable pointer 20 overlapping with each other and pointing to 0 on the scale display, the knob 86 is pinched with a finger and the knob 86 is twisted to set the setting pointer 81. When it is rotated and moved to a predetermined time, for example, a position of 30 seconds (the scale display is at a position of 30), the movable pointer 20 moves with the setting pointer 81 by the rotating mechanism provided on the setting pointer 81. The scale display is located at 30.

As described above, by operating the setting pointer 81 and the movable pointer 20 in accordance with the set time period, data of a required time period corresponding to the set time period is given to the control circuit 3. A setting signal corresponding to this operation is supplied to the counting circuit 8 from the specification changeover switch 8A of the control circuit 3.

The counting circuit 8 responds to the input of the clock pulse CP set to the frequency corresponding to the required time as described above, and outputs the driving signals S1, S2, S3 to the first, second, and third, respectively. Motor drive transistors Tr1, Tr
2, sequentially output to Tr3. Thus, the exciting coils N1 +, N1-; N2 +, N2-; N3 +, N3 wound around the salient poles of the stator 108 of the pulse motor 4
, The rotor 106 of the pulse motor 74 rotates, and the rotation rotates the motor pinion 120, thereby rotating the clutch wheel gear 100 meshing with the motor pinion 120, and meshing with the meshing teeth meshing with each other. The clutch pinion gear 101 rotates via the parts 100A and 101A, and the output gear 210 rotates.

With the rotation of the output gear 210, the movable pointer 20 attached to the spindle 240 of the output gear 210 starts moving from the set time limit position (the position of the time display 30) toward the zero point position. , Pointer return spring 121
Is also involved and accumulates restoring energy.
The movable pointer 20 moves in accordance with the rotation speed of the pulse motor 4. In this case, the movable pointer 20 moves between the set time limit position and the zero point position with a time corresponding to the time limit.

When the movable pointer 20 reaches the zero point position, the zero magnet 20
As a result, the Hall element 24-1 outputs a zero point position detection signal to the control circuit 3 as a result of the position b facing the Hall element 24-1. Since the control circuit 3 stops outputting the drive signals S1, S2, and S3 in response to the input of the zero point detection signal, the pulse motor 4 is de-energized at the same time when the movable pointer 20 reaches the zero point position. And the holding torque disappears.

When the energization of the clutch actuator 104 to the electromagnet 103 is interrupted at the same time that the movable pointer 20 reaches the zero point, the movable lever 104A is put in a no-load state, and the urging force of the gear return spring 102 is applied. , The clutch wheel gear 100 is pushed down, and the meshing tooth portion 10 of the clutch wheel gear 100 is
0A and the meshing tooth portion 101 of the clutch pinion gear 101
The engagement with A is released.

Therefore, the output gear 210 is rotated by the restoring force of the pointer return spring 121, and the movable pointer 20 moves to the setting pointer 81. Since the setting pointer 81 also functions as a stopper for the movable pointer 20, the movable pointer 20 stops at the position of the setting pointer 81.

When the movable pointer 20 moves to the position of the setting pointer 81, the zero magnet 20b is
Since the control circuit 3 no longer faces the zero point position detection signal from the Hall element 24-1.
Thus, the counting circuit 8 again drives the driving signals S1, S2,
The pulse motor 4 is driven by outputting S3.

At the same time, the electromagnet 103 of the clutch actuator 104 is energized, and the movable lever 104A operates to push up the clutch wheel gear 100 and compress the gear return spring 102, as shown in FIG. For this reason, the clutch wheel gear 100
Meshes with the meshing tooth portion 101A of the clutch pinion gear 101.

Therefore, when the pulse motor 4 is driven, the motor pinion 120 rotates, and the clutch wheel gear 100 meshing with the motor pinion 120 rotates, and the meshing teeth 10 meshing with each other rotate.
The clutch pinion gear 101 rotates through 0A and 101A, the output gear 210 rotates, the movable pointer 20 starts moving from the set time limit position (the position of the time display 30) to the zero point position, and the pointer return spring 121 Is also involved and accumulates restoring energy.

The operation chart of the movable pointer type timer T-1 using the self-return type clutch clutch K-1 is as shown in FIG. In FIG. 27, t is a set time, Rt is a reset time, and t 'is a power outage time.

[0111]

As described above, according to the movable pointer type timer according to the present invention, the motor drive circuit of the pulse motor, the zero point detection circuit, and the output circuit are controlled by the microcomputer, so that the mechanical parts are controlled. As much as possible, the structure can be simplified, low cost can be achieved without labor for mold maintenance, parts management and dimensional maintenance, and it takes time to set up and down keys. The visibility and the operability are better than those of the digital timer.

Further, by using a pulse motor as a drive source and using a power supply circuit as a power supply for the pulse motor, the inside can be converted to DC, and a free voltage of 50/6
The timer can be used without the division of 0HZ. For this reason, the series of voltage specifications can be reduced, inventory management is facilitated, and time specifications are not affected by the commercial frequency.

Further, the power supply circuit, the motor control circuit, the pulse motor, and the zero point detection circuit are mounted on a board and assembled to a main frame, and the main frame is fixed to a case, and the main frame is fixed to the main frame. By providing the timer mounting member for fixing the timer body to the mounting member, the power supply circuit, the motor control circuit, the pulse motor, and the detection means can be compactly stored in the case. Thus, assemblability is also improved, and when the movable pointer type timer is attached to, for example, an attachment member using a timer attachment member, the power supply circuit, the motor control circuit, and the pulse motor ,
Since the weight of the zero point detection circuit is all added to and supported by the mounting member via the main frame, and the weight is not added to the case, the case can be made thin and small, and the movable pointer type The timer itself can be reduced in size and weight.

[Brief description of the drawings]

FIG. 1 is a front view of a movable pointer type timer according to the present invention.

FIG. 2 is a side view of a front portion of the movable pointer type timer.

FIG. 3A is a vertical sectional view of the movable pointer type timer. (2) is a perspective view of the substrate configuration.

FIG. 4 is a block diagram of an internal structure of the movable pointer type timer.

FIG. 5 is a block diagram of an internal structure of an electric reset type movable pointer type timer.

FIG. 6A is a side view of a case of the movable pointer type timer. (2) is a front view of the same case.

FIG. 7A is a cross-sectional view of the same case. (2) is a longitudinal sectional view of the same case. FIG. 7C is a sectional view taken along the line II in FIG.

FIG. 8A is a front view of a main frame of the movable pointer type timer. (2) is a longitudinal sectional view of the main frame. (3) is a back view of the main frame.
FIG. 4D is a cross-sectional view along the roll line of FIG.

FIG. 9 is a sectional view of an electric return clutch.

FIG. 10 is a sectional view of the clutch in a clutch-on state.

FIG. 11 is a sectional view of the clutch in a clutch off state.

FIG. 12A is a sectional view of a movable pointer. (2) is a side view of the movable pointer. (3) is a plan view of the movable pointer.

FIG. 13A is a plan view of a switching rotary member.
FIG. 2B is a rear view of the switching rotary member. (3) is a sectional view of the switching rotary member.

FIG. 14A is a plan view of a switching display member.
(2) is a side view of the switching display member. (3) is a sectional view of the switching display member. FIG. 4D is a rear view of the switching display member.

FIG. 15A is a plan view of a switching press cover.
(2) is a side view of the switching press cover. (3) is a rear view of the switching press cover. FIG. 4D is a front view of the switching press cover. (5) is an enlarged view of a C portion of (1).

FIG. 16A is a front view of a front cover.
(2) is a side view of the front cover. FIG. 3C is a cross-sectional view taken along the line II in FIG. (4) is a rear view of the front cover.

FIG. 17A is a front view of a side cover.
(2) is a side view of the side cover. (3) is a sectional view along a ho-ho line of (1). (4) is a rear view of the side cover.

FIG. 18A is a plan view of a setting pointer. (2) is a back view of the setting guide. (3) is a cross-sectional view along the line of (2). (4) is a side view of the setting guideline.

FIG. 19A is a rear view of the knob member. (2) is a cross-sectional view along the toe line of (1). (3) is a top view of the knob member.

FIG. 20 is a perspective view of a pulse motor.

FIG. 21 is a block diagram of a drive control unit of the pulse motor.

FIG. 22 is an operation chart of an electric reset type movable pointer type timer.

FIG. 23 is a block diagram of an internal structure of a self-return type movable pointer timer.

FIG. 24 is a plan view of a self-return clutch in the movable pointer type timer.

FIG. 25 is a sectional view of the self-return clutch in a clutch-on state.

FIG. 26 is a cross-sectional view of the clutch in a clutch off state.

FIG. 27 is an operation chart of a self-return type movable pointer timer.

FIG. 28 is a perspective view of a main part of a conventional movable pointer type timer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Terminal block part 2 Power supply circuit 3 Control circuit 4 Pulse motor 6 Display part 7 Oscillation circuit (Oscillation means) (Control circuit) 8 Counting circuit (Counting means) 8A Time specification switch (Time specification switching means) (Control circuit) 9 Motor drive circuit (control circuit) 10 Reduction gear train 11 Scale plate 13 Detecting means 13A Zero point detecting circuit (Detecting means) (Control circuit) 14 Output circuit (Control circuit) 15 Time limit fixed output relay 16 Instantaneous output relay 20 Movable pointer 24- DESCRIPTION OF SYMBOLS 1 Hall element 81 Setting guide 86 Knob member 86-1 Time limit / instantaneous switching output relay

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor: Gosho Koyama 2075 Kaiyoshi, Okayama City, Okayama Prefecture OMRON Okayama Co., Ltd.

Claims (10)

[Claims] 1. A setting pointer for setting a time limit by rotating a knob on a scale plate, a movable pointer movable from a position of the setting pointer to a zero point by operation of a pulse motor,
A movable pointer type timer having a zero point detection circuit that detects that the movable pointer has moved to the zero point position, and an output circuit that generates a timed output in response to the zero point detection circuit, comprising: a motor drive circuit for the pulse motor; A movable pointer type timer, wherein the zero point detection circuit and the output circuit are controlled by a microcomputer. 2. The movable pointer type timer according to claim 1, wherein the motor driving circuit is driven by an output of a counting circuit that converts an output of the oscillation circuit into a pulse corresponding to a time specification switching unit. 3. The movable pointer type timer according to claim 1, wherein the zero point detection circuit is driven by an output of a Hall element and sends a signal to the output circuit to drive a relay. 4. A power supply circuit, the motor control circuit, the pulse motor, and the zero point detection circuit are mounted on a board and assembled to a main frame, and the main frame is fixed to a case, and the main frame is fixed to the main frame. The movable pointer type timer according to claim 1, further comprising a timer mounting member for fixing the timer body to the mounting member. 5. The movable pointer type timer according to claim 4, wherein a time specification is displayed from a display window of the scale plate, and the time specification is switched from outside the case. 6. A clutch device for transmitting rotation of the pulse motor to the movable pointer, the clutch device comprising:
A drive-side gear rotationally driven by the pulse motor and having one meshing tooth portion; a driven-side gear arranged so as to be able to be separated from and connected to the drive-side gear and having the other meshing tooth portion; A gear return spring for urging a side gear toward the driven side gear to mesh the one meshing tooth portion with the other meshing tooth portion to couple the driving side gear to the driven side gear; and an electromagnet. And a clutch actuator configured to move the drive side gear against the gear return spring by turning on the electromagnet to release the connection between the drive side gear and the driven side gear. The movable pointer type timer according to claim 2, claim 3, claim 4, or claim 5. 7. A clutch for transmitting rotation of the pulse motor to the movable pointer, the clutch comprising:
A drive-side gear rotationally driven by the pulse motor and having one meshing tooth portion; a driven-side gear arranged so as to be able to be separated from and connected to the drive-side gear and having the other meshing tooth portion; Gear urging means for urging a side gear toward the driven side gear, meshing the one meshing tooth portion with the other meshing tooth portion and coupling the drive side gear to the driven side gear, An urging release unit for releasing the connection between the driving side gear and the driven side gear, wherein the gear urging unit includes an electromagnet, and the driving side gear is turned on by the ON operation of the electromagnet. And a clutch actuator that urges the one side meshing portion to mesh with the other meshing tooth portion to couple the drive side gear to the driven side gear. The electromagnet of the clutch actuator 3. A gear return spring configured to urge the drive side gear in a direction away from the driven side gear at the time of demagnetization to release the connection between the drive side gear and the driven side gear. The movable pointer type timer according to claim 3 or claim 4 or claim 5. 8. The movable pointer type timer according to claim 3, wherein the relay driven by the output circuit is an electric reset type which is a timed fixed output relay. 9. The relay driven by the output circuit is a fixed timed output relay and a timed / instantaneous switching output relay, and is a self-return type in which switching of the timed / instantaneous switching output relay is performed by switching means. Item 3. A movable pointer type timer according to Item 3. 10. The movable pointer type timer according to claim 9, wherein the switching means has a slide switch configuration operated from outside the case.