JPH0736253U - Electromagnetic counter - Google Patents

Abstract

(57) [Summary] [Purpose] There is no misalignment of the number cars and the die cost is reduced. [Configuration] 15 is a numeral wheel, 17 is a ratchet gear, 19
Is a segment gear. And ratchet gear 17
A transmission gear 16 is formed on the side surface where is formed. Further, a concave fitting portion 18 is provided, and the ratchet gear 17
Is partially immersed in the recessed portion 18. Further, a part of the pawl portion of the pawl 21 that engages with the ratchet gear 17 is formed so as to project toward the concave fitting portion 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electromagnetic counter, and particularly to a numeral wheel.

[0002]

[Prior art]

 As is well known, an electromagnetic counter is oscillated by an electromagnet, the excitation and demagnetization of the electromagnet, and a pawl with a pawl formed at the tip and a ratchet gear on the side where the pawl's pawl engages. It consists of the lowest digit car, the upper digit car with transmission gears formed on the side, and the pinion that carries between these digit cars.

FIG. 9 and FIG. 10 show a conventional numeral wheel, which is a lowest digit numeral wheel and a high digit numeral wheel, respectively. In these figures, the lowest digit numeral 70 has a ratchet gear 71 at the center of one side surface and a segment gear 72 for carrying up a part of the peripheral surface of the other side surface. Has been done. Further, in the upper digit numeral wheel 75, a transmission gear 76 is formed on one side surface peripheral portion, and a carry gear segment gear 72 is formed protruding on a part of the peripheral surface of the other side surface. Then, the pawl claws are engaged with the ratchet gear 71 protruding from the side surface of the least significant digit numeral wheel 70, and the least significant digit numeral wheel 70 steps by the swinging motion of the pole, and when it makes one revolution, the segment gear 72 is moved. By engaging the long teeth of the pinion, the upper digit digit wheel 75 is stepped through the short teeth of the pinion and the transmission gear 76 to carry up.

[0004]

[Problems to be solved by the device]

 However, in the above-mentioned conventional electromagnetic counter, since it is composed of two types of digit cars, that is, the least significant digit number vehicle and the most significant digit digit vehicle, if the order of assembling the least significant digit numeral vehicle is incorrect, it will be mis-assembled. The problem occurs. In addition, since two types of number wheels are manufactured, two types of dies are required, which causes a problem of increased die cost.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide an electromagnetic counter in which a numeral wheel is assembled correctly and die cost is reduced. It is in.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, the electromagnetic counter according to the present invention has a concave portion on the side of the lowest digit numeral wheel on which the ratchet gear is formed and a transmission gear. A high-order digit number car is constructed, and a part of the claw part of the pole is extended into the concave fitting part of the lowest-order digit number car.

[0007]

[Action]

 According to the present invention, since the transmission gear is provided in the lowest digit vehicle, the lowest digit vehicle can also be used as the upper digit vehicle, and the side face on which the ratchet gear is formed is the recessed portion, so Since the pawl portion of the pole is extended to the inside of the recessed fitting portion, the pawl portion and the ratchet gear can be sufficiently engaged with each other as before.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is an exploded perspective view of an electromagnetic counter according to the present invention, FIG. 2 is also a numeral wheel, FIG. 3 is a pole, FIG. 4 is a coil bobbin, FIG. 5 is a terminal, and FIG. Shows a terminal inserted in the coil bobbin, FIG. 7 shows a lead wire pressed into the terminal, and FIG. 8 shows a front view of the same. In these figures, reference numeral 2 denotes a frame which is composed of a side plate 3 and a bottom plate 4, and the side plate facing the side plate 3 is omitted, and the entire frame is made of synthetic resin.

The side plates 3 are integrally provided with shafts 5 and 6 for number wheels and pinions each having a sharpened tip, and a dowel 7 is formed so as to project so as to sandwich the dowel 7. A pair of rectangular holes 8 are formed. Further, two pairs of distance portions 9 and 10 are vertically provided above and below the front portion and the rear portion of the side plate 3, and the distance portions 9 and 10 are provided with claws 12 formed to face each other. 13 and a claw 11 formed in a direction orthogonal to the claws 12 and 13 are provided in the distance portion 9, respectively.

Reference numeral 15 denotes a numeral wheel. As shown in detail in FIG. 2, a ratchet gear 17 is formed at a central portion of one side surface and a transmission gear 16 is formed at a peripheral surface portion thereof, and a peripheral wheel is formed on the other side surface thereof. A segment gear 19 is formed on a part of the surface. In this way, since one ratchet wheel is provided with the ratchet gear 17 and the transmission gear 16, it becomes possible to use both the lowest digit numeral wheel 15a and the upper digit numeral wheel 15b in this numeral wheel. . Therefore, it is possible to reduce the cost of the mold to one mold, which can be achieved by using two molds in the past. In addition, the side surface of the numeral wheel 15 on which the ratchet gear 17 is formed is formed in a concave shape and is provided with a concave fitting portion 18. In the ratchet gear 17, a part of the root portion of the ratchet gear 17 is formed in the concave fitting portion. It is in a state of being immersed in 18. That is, of the total tooth height T, t ₁ is set in the recessed fitting portion 18, and only t ₂ is projected from the surface. Therefore, although the ratchet gear 17 and the transmission gear 16 are provided, the total thickness of the numeral wheel is not increased as compared with the conventional one.

Reference numeral 21 is a pole, and a hole 22 which is fitted and inserted into the dowel 7 is provided at a substantially central portion and serves as a swing center of the pole 21, and a projection 23 to which a return spring 25 is hooked is provided at a rear portion. The front portion is formed into a bifurcated shape, and a pair of claw portions 24 are provided at the tip. As shown in detail in FIG. 3, the claw portion 24 is formed so as to project in the thickness direction of the pole 21 by t ₁ .

Reference numeral 27 denotes a coil bobbin which is entirely made of synthetic resin, and is composed of a pair of collars 28 and 29 and a hollow body portion 30 around which a coil 31 is wound to connect them. One flange 29 is composed of a thick base portion 32 formed at a position corresponding to the other flange 28 and an extension portion 33 extending from the base portion 32, and the entire outer shape of the frame 2 is the same as that of the frame 2. It has substantially the same shape as the side plate 3. The extension portion 33 is provided with a support hole 34 into which the tips of the shafts 5 and 6 are fitted, and a projection 35 with which the claw 11 engages and a recess 36 with which the claw 12 engages. A notch 37 into which an arm 46 of a yoke 45 described later is inserted is provided.

On the surface of the base portion 32, a pair of vertically parallel mounting grooves 38 is provided as a recess. On the upper and lower surfaces of the mounting groove 38, convex portions 39 are arranged so as to face each other, and on the bottom surface a small diameter is provided. The dowel 40 is formed to project. Reference numeral 41 is a convex portion that is formed at the end of the mounting groove 38 so as to vertically project so as to meander the lead wire 60 described later. 42 is a step portion with which the claw 13 is engaged, 43 is a lead-out groove for drawing out the lead wire 60, and 44 is a hollow portion into which the arm portion 47 of the yoke 45 provided in the body portion 30 is inserted. Reference numeral 45 is a U-shaped yoke having arm portions 46 and 47, and the arm portion 47 forms the core of the coil 31.

A reference numeral 50 indicates a thin terminal plate to which the coil 31 is connected and a lead wire 60 is connected. They are connected by 58. A U-shaped groove 52 into which the lead wire 60 is inserted is formed in the terminal piece 51, and a thin groove 54 is formed in the center of the U-shaped groove 52 so as to protrude from both side walls of the groove 52. Two pairs of thin flakes 53 are provided. Reference numeral 55 is a lead wire pressing piece that is opposed to the other, 56 is a mounting hole, 57 is a coil mounting portion that connects the start end and the end of the coil 31 and that protrudes in directions away from each other, and 59 is a cutting position. It is a cutting line shown.

Next, a method of assembling the electromagnetic counter having such a configuration will be described. First, the coil 31 is wound around the body portion 30 of the coil bobbin 27. Next, in order to attach the terminal plate 50 to the collar 29 of the coil bobbin 27, the terminal piece 51 is inserted into the attachment groove 38 of the coil bobbin 27 from the direction A, and the attachment hole 56 of the terminal piece 51 is inserted into the dowel 40 for positioning. Then, the terminal plate 50 is temporarily fixed to the collar 29 of the coil bobbin 27, and the dowel 40 is fixed by heat staking. Then, as shown in FIG. 6, the connecting portion 58 of the terminal 51 is cut from the cutting line 59. As described above, since the pair of terminals are connected in advance and cut after the mounting, it is possible to prevent the terminal pieces 51 in which the coil mounting portions 57 have different directions from being mounted in the wrong direction, and it is extremely small. Since the complexity of assembling the terminal piece 51 by itself can be eliminated, the assembling work time can be shortened and the mistake in assembling the terminal piece 51 can be eliminated.

Next, the lead wire 60 is inserted into the U-shaped groove 52 of the terminal piece 51 from the direction A. A part of the lead wire 60 inserted into the U-shaped groove 52 is press-fitted into the narrow groove 54, and at this time, the projecting pieces 53 facing each other cut the covering portion of the lead wire 60 and project to the inner lead wire. The piece 53 becomes conductive. Thereafter, the lead wire retainer 55 is bent to prevent the lead wire 60 from being pulled out, and the rear end portion is drawn around the convex portion 41 and guided by the meandering to the lead-out groove 43, and pulled out from the lead-out groove 43. In this way, by inserting the terminal piece 51 into the mounting groove 38 of the coil bobbin 27 forming the side plate of the frame exposed to the outside and inserting the lead wire 60 into the U-shaped groove 52 of the terminal piece 51, the lead wire 60 is formed. Since the projecting piece 53 cuts the covering portion of the lead wire 60 so that the projecting piece 53 is electrically connected to the lead wire 60, the terminal piece 51 and the lead wire 60 are inserted from the A direction. The terminal piece 51 and the lead wire 60 can be connected by simply inserting the lead wire 60 into the U-shaped groove 52 of the terminal piece 51, which facilitates the assembly. After that, the start end and the end of the coil 31 are wound around the coil attachment portion 57 of the terminal piece 51 and fixed by soldering for connection.

In this way, when the coil bobbin assembly in which the terminal plate 51 and the lead wire 60 are assembled to the coil bobbin 27 in advance is configured, next, the side plate 3 is arranged so that the tips of the shafts 5 and 6 of the frame 2 face upward. Is placed on a workbench (not shown) or the like. In this state, the hole 22 of the pole 21 is fitted into the dowel 7 of the frame 2 so that the pole 21 can be swung freely on the dowel 7, and the spring 25 is stretched over the projection 23 and the projection (not shown) of the frame 2. Next, the number wheel 15 and the pinion 20 are alternately inserted into the shafts 5 and 6 so that there is no character deviation as is well known in the art. At this time, since the lowest digit digit wheel 15a and the high digit digit wheel 15b of the numeral wheel 15 are the same numeral wheel, there is no possibility of making a mistake in assembly due to an incorrect insertion order. The shafts 5 and 6 can be continuously fitted and inserted without checking whether or not it is possible to shorten the assembly work time and prevent malfunctions due to assembly errors.

In this way, the coil bobbin assembly described above is assembled to the frame 2 in which the numeral wheel 15, the pinion 20 and the pole 21 are assembled. That is, by fitting the tips of the shafts 5 and 6 into the holes 34 of the coil bobbin 27, the claw 11 is engaged with the protrusion 35, the claw 12 is engaged with the recess 36, and the claw 13 is engaged with the step 42. Thus, the coil bobbin 27 is united with the frame 2, and the collar 29 is configured as the other side plate of the frame 2. After that, the arm portions 46 and 47 of the yoke 45 are inserted into the notches 37 and the hollow portion 44 of the coil bobbin 27, and the tips are fitted into the holes 8 of the frame 2 and assembled.

As described above, the side plate of the frame 2 is divided, and one flange 29 of the coil bobbin 27 is configured as the other side plate, so that the numeral wheel 15, the pinion 20, the pole 21, etc. are opened from the open side of the frame 2. Since it is possible to assemble, it is easy to assemble. Further, by configuring one flange 29 of the coil bobbin 27 as the other side plate, it is possible to expose the mounting groove 38 of the lead wire drawing terminal 50 to the outside, and thus the terminal 50 is easily mounted. Further, the shafts 5, 6 and the dowel 7 are integrally formed on the side plate 3 of the frame 2, the numeral wheel 15, the pinion 20 and the pole 21 are assembled from the A direction, and the coil bobbin assembly and the yoke 45 are also in the same direction. Since it can be assembled from the direction A, the frame is not inverted during assembly, which improves work efficiency and facilitates the introduction of automation.

In the electromagnetic counter thus assembled, the protruding part of the claw portion 24 of the pole 21 enters into the concave fitting portion 18 of the numeral wheel 15 and the concave fitting portion 18 of the ratchet gear 17 is inserted. Since it also engages with the recessed portion, the engagement will not be defective. When energization and de-energization of the current to the coil 31 are repeated, the stepping motion of the conventionally known numeral wheel is performed. That is, the electromagnet including the yoke 45 is excited and de-excited, the pole 21 oscillates about the dowel 7, and the pair of claw portions 24 of the pole 21 are alternately engaged with the ratchet gear 17 to form the lowest position. When the digit / numerical wheel 15a advances and the lowest digit / numerical wheel 15b makes one revolution, the digit wheel 15b of the next digit advances and carries up through the pinion 20, and the upper digit is sequentially advanced. .

In the present embodiment, the numeral wheel 15 and the coil bobbin 31 are parallel to each other, and the yoke 45 having the one arm 47 as the core of the coil bobbin 31 is required. Although the counter is mentioned, the present invention is not limited to this, and it can be applied to a so-called vertical electromagnetic counter in which a core is planted on the bottom of the frame and a part of the frame and the armature are configured as a magnetic circuit. Of course.

[0022]

[Effect of device]

 As described above, according to the present invention, the side surface of the lowest digit vehicle having the ratchet gear is formed as the concave fitting portion and the transmission gear is formed. In addition, since part of the pawl part of the pole is extended into the concave fitting part of the least significant digit number wheel, and there is only one type of number wheel, it is possible to prevent the number wheel from being assembled incorrectly and prevent malfunction. In addition to being able to prevent it, it is possible to shorten the assembly work time. Also, by reducing the number of molds for number cars, it is possible to reduce the mold cost.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electromagnetic counter according to the present invention.

FIG. 2 shows a numerical wheel of an electromagnetic counter according to the present invention,
(A) is a side view, (b) is a front view, and (c) is a front sectional view.

FIG. 3 shows a pole of an electromagnetic counter according to the present invention,
(A) is a front view and (b) is a plan view.

4A and 4B show a coil bobbin of an electromagnetic counter according to the present invention, wherein FIG. 4A is a front view and FIG.

FIG. 5 shows terminals of an electromagnetic counter according to the present invention,
(A) is a plan view, (b) is a side view, and (c) is a front view.

FIG. 6 is a front view of a coil bobbin with terminals assembled in the electromagnetic counter according to the present invention.

FIG. 7 is a front view of a lead wire assembled to a coil bobbin in the electromagnetic counter according to the present invention.

FIG. 8 is a front view of an electromagnetic counter according to the present invention.

FIG. 9 shows the lowest digit of a conventional electromagnetic counter,
(A) is a side view, (b) is a front view, and (c) is a front sectional view.

FIG. 10 shows a high-order digit numeral wheel of a conventional electromagnetic counter,
(A) is a side view, (b) is a front view, and (c) is a front sectional view.

[Explanation of symbols]

 2 frame 3 side plate 5, 6 shaft 7 dowel 8 hole 11, 12, 13 claw 15 number car 15a lowest digit number car 15b upper digit number car 16 transmission gear 17 ratchet gear 18 concave fitting part 19 segment gear 21 pole 24 claw part 27 Coil bobbin 29 Collar 31 Coil 33 Extended portion 35 Protrusion 36 Recessed portion 38 Mounting groove 42 Step portion 45 Yoke 50 Terminal plate 52 U-shaped groove 53 Projection piece 57 Coil mounting portion 58 Coupling portion 59 Cutting portion 60 Lead wire

Claims (1)

[Scope of utility model registration request] 1. A pole having a pawl portion formed at its tip end and swinging by excitation / demagnetization of an electromagnet, a lowest digit vehicle having a ratchet gear on the side surface with which the pawl portion of the pole engages, and an intervening wheel. In an electromagnetic counter consisting of a high-order digit numeral wheel having a transmission gear that meshes with a carry pinion, the side surface on which the ratchet gear of the lowest-order digit numeral wheel is formed is a concave fitting portion and a transmission gear is formed, An electromagnetic counter characterized in that an upper digit numeral wheel is constituted by the lowest digit numeral wheel, and a part of a claw portion of the pole is extended into a concave fitting portion of the lowest digit numeral wheel.