JPS60171586A - Electromagnetic counter - Google Patents

Abstract

PURPOSE:To simplify construction, to improve assembling work and to light the weight by constituting an housing of a counter of a frame made of a metalic material for fitting an electromagnet and a base obtained by forming synthetic region in one body. CONSTITUTION:A counter 1 has approximately a flat base 2 obtained by forming a synthetic regin into a solid construction and a frame 3 obtained by bending and processing a metalic material into a flat U-shape, and by assemblying the base 2 and the frame 3 solidly a housing is constituted. The base 2 fits in the frame 3, and on the base 2 plural pieces 4 connected to the frame 3, a shaft supporting part 5 of a zero reset lever, a protrusion and hole of a pushbutton supporting groove 6, etc., are formed. The frame 3 has a both side wall 3a and a rear wall 3b, and forms a connecting hole 9, which is connected to the connecting piece 4 of the base 2 and forms the base 2 and the frame 3 into a solid construction, shaft supporting holes 10 and 11 and various holes. With this housing constitution, the constitution of the titled device is simplified, and enhancement of assembly operability and weight-lightening can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an electromagnetic counter that performs counting using electromagnetic force, and particularly to an electromagnetic counter that is designed to streamline assembly and reduce the number of parts.

[Prior art]

Electrical equipment such as copying machines and other equipment and devices are generally provided with counters for numerically displaying the number of uses, the time of use, and other quantities. Electromagnetic force is often used as a driving force source for performing the counting function of this type of counter. That is, the counter includes a group of number wheels arranged coaxially to display a multi-digit numerical value, and a plurality of digit feed pinions interposed between the group of number wheels, and by rotationally driving the lowest number wheel. The shifting binion performs a counting operation by sequentially shifting between each number wheel toward the higher number wheel, and electromagnetic force is used for the rotational driving force of the lowest number wheel. For this reason, in this type of counter, an electromagnet is attached to the counter frame, and an armature is arranged correspondingly to the electromagnet, and the armature is reciprocated by energizing and blocking the electromagnet. The configuration is such that the lowest number wheel rotates. At this time, in order to effectively operate the armature with the magnetic field generated by the electromagnet, the above-mentioned counter frame is usually formed of a metal material and used as a part of the yoke of the electromagnet. .

However, if the counter frame is made of metal in this way, the other parts that make up the counter must also have a mounting structure that is compatible with this. There are disadvantages such as the structure becomes complicated, the number of related parts increases, and the installation work becomes troublesome. Furthermore, the total weight of the so-called housing including the base and the like provided integrally with the counter frame becomes large, which also becomes an obstacle to reducing the weight of the counter.

[Summary of the invention]

In the present invention, the housing of the counter is composed of a frame made of a metal material to which at least an electromagnet is attached, and a base integrally molded of a synthetic resin material, etc., and the frame and the base are constructed so as to be able to be assembled and fitted together integrally. By configuring
It is an object of the present invention to provide an electromagnetic counter that can effectively utilize the magnetic force of an electromagnet while simplifying the structure of various counter parts and improving assembly workability, thereby reducing the weight of the counter.

〔Example〕

1 to 3 are overall configuration diagrams of the counter of the present invention, with FIG. 1 being a partially exploded perspective view, and FIGS. 2 and 3 being a plan view and a cutaway side view. In these figures, a counter 1 includes a base 2 integrally molded from a synthetic resin material and configured into a roughly flat plate shape, and a frame 3 formed by bending a metal material into a U-shape in plan. The frames 3 are integrally combined and fitted to form a housing. The base 2 has a plurality of engagement pieces 4 with the frame 3, a shaft support portion 5 for a zero return lever (described later), a push button support groove 6, a bullet cam support rod 7, a contact bullet support groove 8, and other protrusions. It forms a hole. Further, the frame 3 has both side walls 3a.

3a and a rear wall 3b, and the engaging piece 4 of the base 2 has an fM
an engaging piece 9 that integrates the base 2 and the frame 3 together;
Shaft support hole 10.11 and armature support hole 1
2. Various holes are formed.

A main shaft 13 is supported at both ends in the one shaft support hole 10, and a plurality of (in this example, seven) main shafts 13 are supported at both ends.
A number wheel group 14 consisting of number wheels (number wheels) is coaxially mounted. The number wheel group 14 has numbers from rOJ to "9" written in the circumferential direction on its circumferential surface, and a heart cam 15 is provided on the negative side of each number wheel group 14.
are integrally formed. The other number wheels except for the number wheel 16 of the lowest digit on the right side of the figure, that is, the number wheel 17 of the most significant digit on the left side of the figure and the other intermediate number wheels 18, are provided with pin gears 19 on the other side, and pin gears 19 are provided on the other side. A segment gear 2o is provided on one side of the circumference of the other numbered wheels 16 and 18 except for the upper numbered wheel 17.
has been established. Further, a ratchet gear 21 is integrally formed on the other side of the lowest number wheel 16, and a ratchet gear 21 is integrally formed on the other side of the lowest number wheel 16.
An arc-shaped projection 22 is provided protruding in the axial direction on one side of the circumference and in a part of the circumference corresponding to the displayed number "9". In addition, the main shaft 13 has a spring 2 connected to the frame side wall 3a.
3. An L-washer 24 is mounted on the shaft, and the shaft position of the number wheel group 14 is regulated by this biasing force.

A zero return lever 25 having a generally U-shape and biased clockwise by a spring 52 is disposed at the rear of the numerical wheel group 14, and support shafts 26 protruding from both ends of the lever 25 are connected to the respective shafts. The zero return lever 25 is inserted into the support portion 5.
is supported on a base 2 so as to be able to swing vertically. A binion shaft 27 is supported at both ends of the zero return lever 25, and a plurality of shift binions 28 (six in this example) are pivotally supported on the binion shaft 27.

These shift pinions 28 are respectively operated between the numerical wheel groups 14←
Needless to say, the pin gear 19 and the segment gear 20 interposed therebetween engage with each other to perform a known shifting action. Further, on the front surface of the zero return lever 25, seven pressing pieces 29 corresponding to the heart cams of each number wheel group 14 are juxtaposed and protruded. Furthermore, the zero return lever 25
At the other end, a pole drive lever 30 having a slidable contact pin 31 fixed thereto is provided to protrude upward.

On the other hand, a spool 32 is fixed to the rear wall 3b of the frame 3 at its base end with screws or the like. This spool 32 has a core 33 at the central axis position, and a winding 34 made of thin wire is arranged around the spool 32 to form an electromagnetic structure.

A circuit board 35 is integrally fixed to the side of the base end 32a of this spool 32. Components such as a reed switch 36 and a diode 37 are attached to the circuit board 35.
In particular, the reed switch 36 is mounted within the window 35a of the circuit board 35, and its contacts are turned on by the excitation force in the winding 34.

Furthermore, one end of an armature 38 made of a ferromagnetic material piece is supported in the armature support hole 9 at the front position of the spool 32, and the tip 38a of the armature 38 is moved by the electromagnetic force when the winding 34 is energized. It is adsorbed and moved backward (to the left in the figure) against the urging force. Spring 39 connects section 38b of armature 38 and frame 3
It is attached to section 3c.

Further, a ball shirt 40 is supported in the other shaft support hole 11 of the frame 3, and a ball 41 is loosely inserted therein. As shown in FIG. 4, this ball 41 is formed into a roughly U-shape, and ratchet pawls 41a and 41b are integrally formed at its upper and lower ends to alternately mesh with the ratchet gear 21 of the lowest numeral wheel 16. However, the lower side of the shaft support has a slightly larger engagement hole 41c into which the tip of the armature 38 is inserted. Therefore, when the armature 38 is reciprocated at the tip 38a in the front and back direction by the excitation force of the winding 34, the tip of the ball 41 is thereby reciprocated up and down, and the upper and lower ratchets 41a, 4 lb sequentially meshes with the ratchet gear 21 to rotate it step by step in the direction of the arrow shown in the figure together with the lowest numbered wheel 16. Further, a tapered groove 414 is formed on the upper side of the ball 41, and engages the sliding pin 31 of the ball drive lever 30 of the zero return lever 25.

Due to this engagement relationship, when the zero return lever 25 is reset, the ball 41 is slightly rotated clockwise in the drawing by the ball drive lever 30, and the ratchet pawls 41a, 41
b are respectively disengaged from the ratchet gear 21, and the lowest numbered wheel 16 is brought into a free state to enable its return to zero.

On the other hand, at the front left end of the base 2, there is provided a reset push button structure 42 supported by the push button support groove 6 and the like. As shown in an enlarged view in FIG. 5, this push button structure 42 is moved directly rearward against the force of a spring 51 suspended between it and the frame 3 when it is manually operated (pushing operation). A push button 43 and a lid g (S43a
A push-button cam 44 is supported for horizontal rotation, and a push-button lever 45 is located behind the push-button cam 44 and has its rear end engaged with a portion of the zero return lever 25 (an end of the pinion shaft 27). It consists of The push button 43 is integrally formed with an engaging protrusion 43b that fits into the push button support groove 6 and a bullet cam operating protrusion 43c on the right side in the figure, and a cam spring 46 fitted into the lower F portion 43a allows the push button cam to be moved. 4
4 in the counterclockwise direction shown in the figure. However, push button cam 4
4 is in contact with the side wall of the frame and its rotation is restricted. When the push button cam 44 moves backward, the highest number wheel 1 is displayed.
An engaging piece 44a that can be engaged with the projection 22 of No. 7 is provided to protrude upward. Further, the push button lever 45 is supported by the frame 3 by a pin protrusion 45a protruding from one side, and the push button cam 44 is not engaged with this in its normal rotating position, but the push button cam 44 is slightly rotated clockwise. Contact portion 45b that can contact rear end 44b for the first time when moved in a posture
are integrally formed. Note that the long hole 45c in the push button lever 45 is an escape hole for the main shaft 13.

A pair of bullet cams 47 and 48 are inserted vertically into the bullet cam support rod 7 of the pace 2, as shown in FIG. ,5
0 lower tongue piece 49a.

508L are integrally press-fitted and supported.

Then, the other end knob 47 & of the upper bullet cam 47 is brought into contact with the front side surface of one end of the front contact bullet 49, and the lower bullet cam 4
The other end knob 48a of 8 is brought into contact with the rear side surface of one end of the rear contact strip 50, and the contact strips 49, 50 are rotated by rotating the strip cams 47, 48 counterclockwise and clockwise, respectively. Make contact with each other at the installed parts. It is assumed that the contact strips 49, 50 are connected to an electric lock circuit (not shown). The upper bullet cam 47 is rotated counterclockwise against the spring force of the contact bullet 49 when the actuating protrusion &1S47b is engaged with the protrusion 22 of the top numeral wheel 17, and the lower The bullet cams 48 are rotated clockwise against the spring force of the contact bullet 50 by having one end pushed by the bullet cam operating protrusion 43c of the push button 43. and push button 43
The relative position is determined.

By the way, in the counter structure constructed as described above, the housing is constructed by integrally fitting the frame 3 and the base 2 as shown in FIGS. 2, 3, and 7, as described above. However, for this fitting, the engaging piece 4 of the base 2 may be fitted into the retaining hole 9 of the frame 3. On the other hand, in order to improve the structural strength of the frame 3, holes 60 and 60 are formed at the front ends of both ends 3a and 3a of the frame 3.
It has a structure in which both ends of the distance rod 61 are caulked and fixed at 0.6o.

This distance rod 61 is hollow at least at both ends and provided with hollow holes 62, 62, but in this example, the entire distance rod 61 is hollow. Further, by assembling the frame 3 and the base 2 integrally in this way, the vertical piece 63 of the base 2 shown in FIG. Furthermore, the vertical piece 64°6 in Figure 1
5 and the like act as holding pieces for giving moderation to the lead wires 66 and 67 connected to the winding 34 and the contact strips 49 and 50. Note that the lead wire 67 connected to the contact strip 49.degree. 50 extends along the inside of the groove 68 formed on the back surface of the base 2, as shown in FIG. 8, and projects downward from the bottom surface of the base 2. There isn't. In the figure, 75 is a protrusion 76 of the frame 3
It is a square hole that fits into.

As shown in FIG. 7, the counter structure constructed as described above can be housed in a container-shaped casing 69 integrally formed with synthetic basin. The casing 69 has a display window 70 for the numeral wheels 14 with a transparent plate attached to its front surface, and an operation window 71 for the push button 43. Further, attachment pieces 72 for attaching to equipment not shown are integrally formed on the upper and lower outer sides.

A through hole 73 is formed on each side of the casing 69 at a position corresponding to the distance rod 61, and a hole 73 is formed from the outside of the through hole 73 into the middle part 62 of the distance rod 61 as shown in FIG. The pin 74 is press-fitted, thereby preventing the counter structure from being removed from the casing 69. Therefore, it is difficult to pull out the pin 74 easily, and it is difficult to take out the counter structure q unless the pin 74 is sheared.

According to the above configuration, each time the winding 34 is energized, the electromagnetic body mainly composed of the spool 32 is excited and attracts the armature 38, and when the excitation force is dissipated, the armature 38 is moved back. let Due to this back and forth movement of the armor square 38, the entire ball 41 engaged with the tip 38a is swung up and down about the ball shaft 40.
The reciprocating motion of the upper and lower pawls 41a, 411) causes the ratchet gear 21, that is, the lowest number wheel 16, to rotate in steps of one number in a known manner.

This rotation is sequentially transmitted to the upper digit number wheels by the cooperation of the segment gear 20, the shift pinion 28, and the pin gear 19, and a so-called mechanical feed operation is performed to display the cumulative number on the circumference of each number wheel group 14. It will be displayed.

During this time, when the highest number wheel 17 is displaying "8" or less, the protrusion 22 on the side is in a position other than the front, as shown in FIG. The push button cam 44, which is in its normal position and in contact with the wall surface of the frame 3 by the spring 46, does not engage with the protrusion 22, and the push button cam 44 is moved backward in its normal position as shown in FIG. The rear end passes beside the contact portion 45m of the push button lever 45 and does not come into contact with it, so the push button lever 45 is not operated and the zero return operation is not performed. However, the highest number car 17 is "9".
When displaying, the protrusion 22 is moved to the front position as shown in FIG.
4 is moved backward, the engagement piece 441 engages the protrusion 22.
The push button cam 44 is engaged with the spring 46 and prevented from advancing in the normal state, causing the push button cam 44 to resist the force of the spring 46.

As the push button cam 44 is rotated in the direction, the rear end 4b of the push button cam 44 is slightly displaced laterally, and as it moves backward, the rear end 44
b comes into contact with the abutting vagina 5b of the push button lever 45 and is further moved rearward, thereby moving the push button lever 45 backward integrally. As a result, the zero return lever 25 is rotated counterclockwise, and the shift pinion 28 supported by it is retracted from between the number wheel group 14 to bring the number wheel group 14 into the 79-state, while the zero return lever 25 is rotated counterclockwise. This rotation of 25 causes the pressing piece 29 to come into contact with the heart cam 15, which is forcibly rotated by the well-known heart cam operation, thereby returning the number wheel group 14 to zero.

At this time, as the zero return lever 25 rotates counterclockwise from the normal state of FIG. The pawl 41 is rotated slightly clockwise by the cam action of the taper groove surface by moving the inside of the pawl 41 and engaging with the surface on the left side in the figure and pushing it further.
&.

41b are both moved downward by a minute amount, and in particular, the lower pawl 41b is separated from the ratchet gear 21. As a result, both of them are disengaged from the ratchet gear 21, and the ratchet gear 21, that is, is integral with it. Set the lowest number wheel 16 free. Therefore, the other number car 17
．． 18, the above-described zero return operation of the lowest number wheel 16 is enabled.

On the other hand, the reed switch 36 on the circuit board 35 is turned on by the excitation of the electromagnet structure, and the counting operation of the counter is sent as an electric signal to a circuit not shown. In this case, the 12th
As shown in the figure, the circuit board 35 has a pair of terminals 53 which are press-fitted into the base end 32a of the spool 32 and whose tips protrude from the sides.
A pair of holes are inserted through the holes 53, and solder 55, 55 is applied to electrode pads 54, 54 provided around these holes to connect them. Therefore, the circuit board 35 is supported by the terminal 54.54 at the same time as the two terminals 63.53 and the electrode pad 54.54 are electrically connected, and there is no need to use a special support structure. .

Furthermore, when counting continues until the highest number wheel 17 displays "9", the protrusion 22 serving as a cam on the negative side moves upward from below as the highest number wheel 17 rotates. Since it is rotated and positioned forward, the operating protrusion 47b of the upper bullet cam 47 is pushed by the protrusion 22 from behind.
As a result, the bullet cam 47 is rotated counterclockwise as shown in FIG. 13(B) from the state shown in FIG. is moved upward in the figure to contact the contact strip 50 and turn on the contact. This is used as a predetermined count signal to operate an electric lock circuit (not shown), thereby disabling, for example, a copying machine.

Furthermore, during the above-mentioned zero return operation using the push button 43, since the push button 43 is moved upward in the drawing as shown in FIG. Then, the lower bullet cam 48 is rotated clockwise. Therefore, the other end knob 481L is connected to the contact strip 5.
0 is moved downward in the figure to bring the contact strip 50 into contact with the contact strip 49 to turn on the contact, and during the zero return operation, an electric lock circuit (not shown) is activated to deactivate equipment such as a copying machine.
state.

Therefore, according to this counter, the synthetic resin base 2
Since the housing is made up of the metal frame 3 and the electromagnet structure, if the electromagnet structure is attached to the frame 3, the frame 3 can be used as a yoke, and even if the electromagnet is miniaturized, a strong magnetic field can be obtained. It is possible to secure sufficient driving force and obtain stable and reliable counting operation.

On the other hand, since base 2 is integrally molded from synthetic resin,
The engagement piece 4 with the frame 3, the shaft support part 5, and other protrusions and holes can be integrally formed, and when assembling, only a simple fitting operation is required, making the assembly extremely simple. can. In particular, when the frame 3 and the base 2 are integrated, it is only necessary to engage the engagement piece 4 of the base 2 with the engagement hole 9 of the frame 3, which is extremely easy. Further, in this counter, the strength of the entire structure can be improved by the metal strength of the frame 3, and by forming the base 2 from resin, it is possible to reduce the number of attached parts and reduce the weight.

Note that the present invention is not limited to the embodiments described above, and the shape, structure, etc. of each part may be modified or changed as appropriate. Of course, the fitting structure between the base 2 and the frame 3 can also be changed as appropriate.

〔Effect of the invention〕

According to the present invention, the housing of the counter is composed of a base and a frame, and at least the frame for attaching the electromagnet is made of a metal material, while the base for holding various parts is made of a synthetic resin material. Therefore, the frame functions as a yoke for the electromagnet to make effective use of electromagnetic force, thereby stabilizing and ensuring the counting operation, and in particular simplifying the structure of various parts attached to the base and improving assembly workability. improvement can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a partially exploded perspective view of the counter of the present invention, Fig. 2 is a plan view of the assembled state, Fig. 3 is a cutaway side view, Fig. 4 is an enlarged perspective view of the ball portion, and Fig. 5 is the push button structure. FIG. 6 is an enlarged perspective view of the contact part, FIG. 7 is a perspective view of the casing in the stored state, FIG. 8 is a perspective view seen from below, FIG. 9 is a front sectional view, ) to (0) are plan views for explaining the action of the push button assembly, Figures 11 (A) and CB) are side views for explaining the zero return operation, Figure 12 is a perspective view of the electromagnet body, and Figure 13 is a side view for explaining the zero return operation. Figures (A) to (0) are plan views for explaining the operation of the contacts. DESCRIPTION OF SYMBOLS 1...Counter, 2...Base, 3...Frame, 4...Engagement piece, 9...Engagement hole, 14...Number wheel group, 25...Zero return lever, 28... Digit pinion, 32... Spool, 34... Winding wire, 38...
Armature, 41...Ball, 42...Push button structure, 43...Push button, 44...Push button cam, 45...Push button/(-149,50...Contact bullet, 61...・Distance rond, 66° 67...Lead wire, 68・
... Concave groove, 69 ... Casing, 70 ... Display window,
71...operation window, 73...transparent 74...bottle. Figure 2 Figure 3 Figure 4 Figure 5 Figure 2ρ Figure 6 Figure 7 Figure 8 Figure 9/ Figure 10 Figure 11 (A) (B) Figure 12 Figure 6

Claims (1)

[Claims] It is equipped with a group of number wheels of a plurality of digits, a shift pinion that is interposed between the group of number wheels and performs a digit shifting operation, and an electromagnet that rotates the number wheel of the lowest digit of the number wheel group by electromagnetic force. The electromagnetic counter has a frame made of a metal material to which the electromagnet is attached, and a base integrally molded from a resin material to which various parts can be attached. An electromagnetic counter characterized in that it is constructed so that it can be assembled and fitted integrally.