JPH0454532Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic counter, and more specifically, a pole and an armature are integrally connected, and the fulcrum portion thereof is composed of one, thereby simplifying the structure. It was designed to measure the

[Conventional technology]

Conventionally, this type of electromagnetic counter has a plurality of number wheels rotatably mounted on a number axle, an electromagnet consisting of an electromagnetic coil, a core, a yoke spool, etc.
A swingable armature that is suction operated by a yoke, and a swinging armature linked to this armature.
It is generally composed of a pole that rotates the lowest digit wheel in steps, a return spring that gives the pole a return behavior, and a counter frame in which these components are assembled. In this case, since the armature and the pole are arranged to be able to swing independently, there are two bearing structures, specifically, a bearing hole provided on the side wall of the counter frame, and a bearing hole provided upright on the bottom of the frame. protrusions, etc., are required.

[Problem that the invention attempts to solve]

However, as mentioned above, such conventional electromagnetic counters require two bearing structures to swingably support the armature and the pole, which not only complicates the structure but also makes the assembly work difficult. There was also the inconvenience that it was troublesome.

Furthermore, in the conventional so-called side armature type electromagnetic counter in which the armature is sucked by a yoke formed integrally with the core, as shown in Japanese Utility Model Application Publication No. 55-67464, etc. The armature is formed into a flat plate shape, with one end serving as a swinging fulcrum and the other end facing the yoke in close proximity. One way to obtain a large driving force in such a configuration is to increase the area where the armature and yoke face each other, but this increases the width of these two members and also increases the length and stroke of the armature. Since it is inevitably longer, there is a problem in that the electromagnet itself becomes larger. Furthermore, as the armature becomes longer, the force of the return spring must be increased.
This also means that a larger driving force is required.

[Means for solving problems]

The electromagnetic counter according to the present invention was developed to solve the above-mentioned problems all at once.The yoke is formed into a U-shape, and one arm of the yoke is used as the yoke body, and the other arm is used as the core. The armature is formed into a substantially crank shape (〓 shape) and is disposed on one side of the pole so that its swinging fulcrum is located approximately on the center line of the yoke, and one leg of the armature is attached to the yoke body. a fitting part that faces the upper surface (or lower surface) of the tip end, the other leg part faces the lower surface (or upper surface) of the tip end of the core, and in which both ends of the armature fit into the pole, and the swing fulcrum; A fulcrum shaft is integrally provided corresponding to the position, and this fulcrum shaft is pivotally supported by a bearing provided on the counter frame.

[Effect]

In the present invention, the armature is integrally disposed on the pole, and the fulcrum shaft of the pole is provided corresponding to the swing fulcrum position of the armature, so that the bearing structure of these two members can be shared.

In addition, the armature is formed into a substantially crank shape,
Since both ends of the armature are attracted close to the yoke body and the core, the opposing area between the armature and the yoke is large. Therefore, a large driving force can be generated without increasing the width or length of these two members. Furthermore, the operating force of the return spring can be reduced.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is an enlarged sectional view taken from FIG. 2 showing an embodiment of the electromagnetic counter according to the present invention, FIG. 2 is a perspective view of the counter, and FIG. 3 is an overall plan view with the cover of the counter cut away. 4 is a sectional view taken along the line in FIG. 3, FIG. 5 is a right side view of the counter frame, and FIGS. 6 and 7 are enlarged sectional views taken along the line in FIG. 1 and -, respectively. In these figures, a counter frame 1 is formed of a synthetic resin material into a box shape with an open front and top surface, and an electromagnetic coil 3 wound around the outer periphery of a spool 2 is disposed at the inner rear of the counter frame 1. . The spool 2 is formed into a rectangular tube shape, and has a pair of spool collars 2A, 2 at both ends.
B, and is fitted into the core 6 of the yoke 4.

The yoke 4 is formed in a U-shape, so that one arm is located in front of the electromagnetic coil 3 to form a yoke body 5, and the other arm is located in the center hole of the electromagnetic coil 3, that is, inside the spool 2. An electromagnet 10 is inserted into the spool 2 and the electromagnetic coil 3 to form the core 6, and further connects one end of the yoke body 5 and the core 6 to each other by a connecting portion 7, and causes an armature 8, which will be described later, to be attracted to the spool 2 and the electromagnetic coil 3. It consists of The yoke 4 having such a configuration is inserted into the counter frame 1 through a longitudinally long elongated hole 12 formed in one side plate, for example, the right side plate 11, of the counter frame 1, and the connecting portion 7 is inserted into the frame 1. It is held by a long hole 12.

On the other hand, the other side plate of the counter frame 1,
That is, on the inner surface of the left side plate 13, a pole 15 extending in the front-rear direction is arranged so as to be swingable in the vertical direction about a fulcrum shaft 16 provided at the middle part in the longitudinal direction. For example, the return spring 14 provides a clockwise return behavior in FIG. The fulcrum shaft 16 is provided to correspond to the swing fulcrum position of the armature 8, and is located approximately on the center line of the yoke 4.
Both ends are pivotally supported by bearings provided on the counter frame 1. As shown in FIG. 4, this bearing portion is constituted by a bearing hole 17 formed in the right side plate 13 and a vertical groove 19 of a support piece 18 projecting from the inner bottom surface of the counter frame 1. Further, the support piece 18 has a function as a stopper that restricts the movement of the spool 2, in other words, the electromagnetic coil 3, in the direction of the pole 15 by elastically engaging with the spool collar 2B of the spool 2. .

The armature 8 is arranged and fixed on the inner surface of the pole 15 in correspondence with the yoke body 5 and the core 6, and is bent into a substantially crank shape (diameter shape) as shown in FIG. It has a pair of legs 8A and 8B extending in the front-rear direction, with the front leg 8A facing the upper surface of the tip of the yoke body 5, and the rear leg 8B facing the lower surface of the tip of the core 6. are doing. The inner surface of the pole 15 has a concave fitting portion 2 into which the front and rear ends of the armature 8 fit, respectively.
0A, 20B, and a pair of protrusions 21A, 2 that hold the upper surface of the front leg 8A and the lower surface of the rear leg 8B.
1B is integrally provided.

The yoke 4 and the armature 8 are each formed by punching soft iron or the like by press working, but in this case, in normal press working, sag occurs on the front side peripheral edge and burrs appear on the back side peripheral edge. It is something that occurs. In this case, since the sag is substantially the same as chamfering and reduces the facing area between the yoke 4 and the armature 8, it is desirable that the burrs side surfaces face each other. However, if the armature 8 is formed into a substantially crank shape and its front leg 8A is opposed to the upper surface of the yoke body 5 and its rear leg 8B is opposed to the lower surface of the core 6 as in this embodiment, The curved side surfaces of one of the legs face each other, and the sagging sides of the other leg face each other.

Therefore, in this embodiment, in order to prevent the reduction in the facing area due to such sag, the yoke 4 and the armature 8 are partially punched and pressed from opposite directions in the front and rear halves, thereby forming the yoke main body 5 and the front leg. 8A has burrs 2 on its upper surface 23 and lower surface 24 sides, respectively, as shown in FIG.
As shown in FIG.
8 sides are provided with burrs 29A and 29B, respectively.

Left and right side plates 11, 1 of the counter frame 1
Between the front ends of 3, there are a plurality of number wheels 3, for example, 6 number wheels.
A number axle 31 that commonly rotatably supports 0a to 30f and a pinion shaft 33 that commonly rotatably supports five shift pinions 32 interposed between these number wheels 30a to 30f are parallel. It is suspended horizontally. There is a ratchet 3 on the left side of the lowest digit number wheel 30a (the side facing the pole 15).
4 (see FIG. 1) are integrally provided, and vertically opposing double claws 35a, 35b are provided at the front end of the pole 15 with respect to this ratchet 34.
are configured to engage alternately as the pole 15 swings. A segment pin (not shown) for digit feeding is integrally provided on the outer periphery of the right side of each number wheel 30a to 30f, and the lowest digit number wheel 30
A pin gear 36 is provided to protrude from the outer periphery of the left side surface of the remaining number wheels 30b to 30f excluding the number wheel a over the entire circumference. The segment pins for digit feeding of each number wheel 30a to 30f and the pinion 32 mesh with each other during digit feeding of the next digit number wheel, and the pin gear 36 and pinion 3
2 are always meshed.

Further, a pair of upper and lower lead wire guide grooves 42 and 43 are formed at the rear end of the right side plate 11 of the counter frame 1 to accommodate and hold lead wires 40 and 41 for external connection of the electromagnetic coil 3, respectively. is opened in the back plate 44 of the frame 1. On the other hand, on the outer surface of the right spool collar 2A facing the right side plate 11 of the spool 2 with an appropriate distance therebetween, a pair of upper and lower terminal pieces 48 extending in the front-rear direction are provided.
a, 48b (see FIG. 5) are the respective lead wires 40,
41, and these terminal pieces 48
Each end of the electromagnetic coil 3 and one end of lead wires 40 and 41 are connected to a and 49b, respectively. Each of the lead wires 40 and 41 has protrusions 50 and 5 provided in the respective lead wire guide grooves 42 and 43.
1 and protrusions 52, 53 forming the outlet portion thereof.
The lead wires 40 and 41 are meandered in a substantially S-shape and pulled out to the rear of the frame, thereby preventing breakage of the lead wires 40 and 41 due to external tensile force.

The counter frame 1 in which the various constituent members described above are assembled is housed in a case 55 formed into a rectangular tube shape, and each number wheel 30 is provided on the front surface of the case 55.
A reading window 56 is provided for reading the displayed values a to 30f, and a transparent plate 57 is fitted and fixed to the window 56.

In the electromagnetic counter having such a configuration, when an input signal is applied to the electromagnetic coil 3, the yoke body 5 and the core 6 are excited by the excitation of the coil 3.
sucks each leg 8A, 8B of the armature 8 to operate the armature 8. Then, due to the movement of this armature 8, the pole 15
swings counterclockwise in FIG. 1 about the swing fulcrum, that is, the position of the fulcrum shaft 16, and drives the ratchet 34 with its upper double claws 35a, moving the lowest digit number wheel 30a by half a character. Rotate in steps. On the other hand, when the electromagnetic coil 3 is demagnetized, the pawl 15 is rotated back to its original position by the action of the return spring 14, and the lower double claws 35b now engage the latch 34 and rotate it. make it move. As a result, the number wheel 30a further rotates by half a character. When the number wheel 30a rotates once in this way, the segment pin for digit feeding provided on the right side of the number wheel 30a and the number wheel 30
The pinion 32 interposed between a and 30b temporarily engages and rotates the pinion 32 by a predetermined angle.
Pin gear 33 provided on the left side of 0b
The number wheel 30b is
Rotate by one character increments.

In the above embodiment, the front leg portion 8A of the armature 8 is placed on the upper surface of the yoke body 5, and the rear leg portion 8B is placed on the upper surface of the yoke body 5.
are respectively opposed to the lower surface of the core 6, but the present invention is not limited to this.The armature 8 is assembled to the pole 15 upside down, and the leg portions 8A are attached to the yoke body 5.
Of course, the leg portions 8B may be opposed to the lower surface of the yoke 6 and the upper surface of the yoke 6, respectively.

[Effect of idea]

As described above, in the electromagnetic counter according to the present invention, the armature that is operated by suction by the yoke is arranged on one side of the pole, and the fulcrum axis of the pole is provided so as to correspond to the swing fulcrum position of the armature. , there is no need to provide a rotating shaft on the armature, and if the armature does not have a rotating shaft, there is no need to provide a bearing structure for the armature on the counter frame, so the structure of the counter frame is simple and can be manufactured at low cost. Furthermore, the armature can be assembled to the pole simply by fitting both ends of the armature into the fitting portions, so it is very simple and easy.

In addition, in the present invention, the yoke is formed in a U-shape, the armature is bent into a substantially crank shape,
One leg of the yoke faces the top (or bottom) of the yoke body, and the other leg faces the bottom (or top) of the yoke's pole. Compared to a vertical type electromagnetic counter, the opposing area between the yoke and the armature can be increased, and therefore a large driving force can be obtained. Furthermore, by locating the swinging fulcrum of the armature at approximately the center in its longitudinal direction, the operating force of the return spring can be reduced compared to conventional armatures that have a swinging fulcrum at one end, so the electromagnet Its practical effects are very large, such as being able to reduce the driving force of the motor.

[Brief explanation of the drawing]

FIG. 1 is an enlarged sectional view taken from FIG. 2 showing an embodiment of the electromagnetic counter according to the present invention, FIG. 2 is a perspective view of the counter, and FIG. 3 is an overall plan view with the cover of the counter cut away. 4 is a sectional view taken along the line in FIG. 3, FIG. 5 is a right side view of the counter frame, and FIGS. 6 and 7 are enlarged sectional views taken along the line in FIG. 1 and -, respectively. 1... Counter frame, 3... Electromagnetic coil,
4...Yoke, 5...Yoke body, 6...Core,
8... Armature, 8A... Front leg, 8B
... Rear leg, 15 ... Pole, 16 ... Fulcrum shaft, 17 ... Bearing hole, 18 ... Support piece, 20A,
20B...Mating part.

Claims (1)

[Scope of utility model registration request] Formed in a U-shape, one arm constitutes the yoke body, the other arm constitutes the core, and the yoke is inserted into the center hole of the electromagnetic coil, and the armature is arranged corresponding to this yoke. , the armature is provided with a swingable pole fixed to one side, the armature is formed in a substantially crank shape (〓 shape), and its swing fulcrum is located substantially on the center line of the yoke; A leg portion faces the upper surface (or lower surface) of the tip end of the yoke body, and the other leg portion faces the lower surface (or upper surface) of the tip end portion of the core,
The pole is integrally provided with a fitting part into which both ends of the armature are fitted, and a fulcrum shaft corresponding to the swing fulcrum position, and this fulcrum shaft is supported by a bearing part provided on the counter frame. An electromagnetic counter characterized by being pivotally supported.