JPH0410872B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a portable printed stamp.

(Prior Art) Conventionally, as a freestyle time stamp, there is an analog time stamp linked to the hands of a clock, in which the date is manually changed. There is also a time stamp that is printed using a type wheel, which constantly advances the type wheel intermittently at a predetermined timing and is equipped with a carry mechanism. There is also a time recorder, which is similar to a time stamp, and is a large one used in parking lots, etc., and has an automatic month-end adjustment function.

(Problems to be Solved by the Invention) According to the above-mentioned first conventional technology, there are problems with continuity and strictness peculiar to the analog system, and the date must be changed manually, which is cumbersome. . In addition, according to the second conventional technology, the mechanical carry mechanism is complicated and the digits are strongly connected to each other, so it is impossible to freely control each digit, and furthermore, it is impossible to control each digit at any time regardless of printing Since the type wheel is fed intermittently, a large amount of energy is consumed. Furthermore, in the third prior art, since the device is large in size, it cannot be made free-style, compact, and lightweight, and there are restrictions on where it can be used.

According to the present invention, the structure is configured such that type is selected for each digit only when printing, thereby simplifying the mechanism, achieving a compact size that is easy to carry, reducing electrical energy consumption, and extending battery life. We offer portable printing stamps.

(Means for Solving the Problems) The present invention includes a plurality of printing wheels 3 arranged side by side on a printing axle 2 so as to be rotated frictionally following the rotation of the printing axle 2, and each printing wheel has a type 3a on its outer periphery. A printing mechanism A is provided, which has a ratchet 3b formed on its side surface and a type selection mechanism B for engaging the selection lever 11 with the ratchet 3b via an electromagnetic device.
This printing mechanism is housed in an exterior case 1 so as to be vertically movable, and this vertical movement is made by a handle 14. Further, there are provided a rotation driving means C for the printing axle 2 which is linked to the vertical movement of the handle 14, a rotation angle detection means D for the printing axle, and a push detection means E for the handle 14. Further, the printing axle 2 is provided with position holding cams 25a, 25b having a notch 26, and cam followers 28a, 28 supported on the exterior case 1 are provided.
When the cam surface is in contact with the cam surface 8b, the printing wheel is held apart from the printing surface, and when the cam follower enters the notch 26, printing is possible. The drive circuit includes a clock circuit 34 that measures time, a memory circuit 35 that is supplied with the output of this clock circuit and holds the output of the clock circuit when the press detecting means E is activated, and a memory circuit that stores the output of the clock circuit and the rotation angle. The control circuit 36 is supplied with each output of the detection means D and supplies a selection signal to the electromagnet device 5.

Furthermore, in the present invention, a counting circuit 37 is provided in place of the clock circuit 34, which is activated by the output of the push-down detection means E when the push-down detection means E goes up, and the portable printer adds the output of the push-down detection means E when the push-down detection means E goes up, and prints this counted value. It is used as a stamp.

Further, in the present invention, a counting circuit 37 is provided together with the clock circuit 34, and switching means for switching between the clock circuit and the counting circuit, so that the clock can be selectively used as a time stamp or a numbering stamp.

(Function) In the present invention, when the handle 14 is pressed down during printing, the printing mechanism A is lowered, and this lowered position is held by the position holding cams 25a and 25b, and in this state, the printing axle 2 rotates, and the rotation angle is detected,
During the forward rotation of the printing axle 2, the printing control circuit 36a
The type of type on the printing wheel 3 is selected through the . When the type selection is completed, the printing mechanism A is suddenly lowered to perform printing.

(Example) As shown in FIGS. 1 to 4, the outer case 1
A printing mechanism A having a character selection mechanism B is housed therein so as to be vertically movable. That is, an annular positioning groove 2b is provided at a predetermined distance from a notch 2a formed in the thrust direction. A plurality of printing wheels 3 are arranged in parallel on the printing axle 2 so as to be rotated by friction. As shown in the fourth figure, the printing wheel 3 is integrally provided with type letters 3a on the outer circumference, a ratchet 3b on the side surface, and a spring arm 3c that can engage and disengage from the notch 2a of the printing axle 2. A projection 3d is provided at the tip of the spring arm 3c, and this projection engages in the positioning groove 2b. Both ends of a printing axle 2 on which a plurality of printing wheels 3 are arranged side by side are rotatably supported on side plates 4a and 4b. The side plates 4a and 4b are movable up and down along guides (not shown) formed on the inner surface of the exterior case 1 while maintaining correct postures. As shown in FIGS. 3 and 4, an electromagnet device 5 is provided on the upper part of the printing wheel 3.
A type selection mechanism B including a selection lever 11 and a selection lever 11 is arranged. That is, the electromagnet device 5 is connected to the side plates 4a, 4
It is held by a yoke holder 6 fixed to b, and the yoke 7... is held by the yoke holder 6.
Coils 8 are wound around the yoke, a permanent magnet 9 (shown in the fourth figure) is held at the upper end of the yoke 7, and a permanent magnet 10 is held at the lower end of the yoke 7 with a gap therebetween. A rear end portion 11a of the selection lever 11 is located within the gap between the yoke 7 and the permanent magnet 10. The selection lever 11 is rotatably supported on a shaft 12 supported by the side plates 4a, 4b, and its tip 11b can be engaged with the ratchet 3b. Reference numerals 13 and 13 denote two comb-teeth-shaped biasing springs, whose bases are attached to both sides of the yoke holder 6 as shown in the second and third figures, and whose tips are used to press the selection levers 11 of each digit. The tip 11b of the ratchet 3b is pressed against the ratchet 3b. The rotation range of the selection lever 11 is from the position where the rear end 11a is attracted to the yoke 7 to the position where the rear end 11a is attracted to the permanent magnet 10, and this position can be switched instantly by the spring force of the biasing spring 13. It is what is done. A handle 14 is provided at the top of the exterior case 1 to allow the printing mechanism A to move up and down. That is, the outer case 1
A cylindrical portion 1a is provided at the upper part of the cylindrical portion 1a, and the handle 14 fits into the cylindrical portion 1a and is slidable up and down. An upper guide shaft 15a is provided inside the cylindrical portion 1a and the handle 14.
and a lower guide shaft 15b are housed therein. The upper end of the upper guide shaft 15a is fixed to the handle 14 with a screw 16. Further, the lower guide shaft 15b has a cylindrical portion 1a.
It can freely slide up and down in contact with the inner surface of. A pressure spring 17 is interposed between the upper guide shaft 15a and the lower guide shaft 15b, and a return spring 18 is interposed between the cylindrical portion 1a and the handle 14. The lower end of the lower guide shaft 15b is connected to a horizontal portion of a rack plate 19 constituting a rotation driving means C to be described later.

The rotation driving means C for the printing axle 2 will be described.
A vertical portion hangs down from one end of the horizontal portion of the above-mentioned rack plate 19, and a rack tooth 19a and a guide long groove 19b are provided below this vertical portion. A guide pin 20 is provided protruding from the side plate 4a, and this pin passes through a long guide groove 19b of the rack plate 19. A pinion 21 rotatably supported on the side plate 4a is engaged with the rack tooth 19a, and this pinion 21 is engaged with a drive pinion 22a fixed to a protrusion of the printing axle 2 from the side plate 4a.

The rotation angle detection means D for detecting the rotation angle of the printing axle 2 will be described. As shown in FIG.
is firmly fixed, and a pinion 23 is engaged with this drive pinion. This pinion is provided concentrically with a slit disk 24 having a plurality of slits on its outer periphery. Photo sensors (not shown) are placed opposite each other with a slit in between.

At both ends of the printing axle 2, position holding cams 25a,
25b is fixed. This position holding cam is the first
As shown in the figure, a notch 26 is provided in a part of the cam surface on the circular outer periphery. As shown in FIGS. 1 and 2, cam followers 28a and 28b are provided on both inner surfaces of the exterior case 1 by holders 27a and 27b so as to be able to directly below position holding cams 25a and 25b. The printing mechanism A is pushed down by the handle 14, and the position holding cam 25 is attached to the cam followers 28a, 28b.
When the cam surfaces of a and 25b are in contact with each other, the printing wheel 3
is held at a position away from the printing surface P (shown in the first diagram). Then, the cam followers 28a, 2 are inserted into the notch 26.
When 8b enters, the printing wheel 3 comes into contact with the printing surface P and printing becomes possible. One position holding cam 25a
and the cam follower 28a constitute a switch, which serves as press detection means E of the printing mechanism A.

As shown in FIGS. 1 and 3, a display window 29 is opened in the exterior case 1, and a display means 30 is provided within this window. The display means 30 is a liquid crystal panel in this example, and is connected to a drive circuit provided on a circuit board 31. A required number of set keys 32 are arranged below the display window 29 for manually setting the time, switching modes, etc.

The operation when printing will be explained. Handle 1
4 is pushed down against the spring force of the return spring 18.
The lower guide shaft 15b is lowered by the spring force of the pressing spring 17, and the rack plate 19 is lowered. Easy tooth 1
As the pinion 9a is lowered, the pinion 21 receives a rotational force in the counterclockwise direction in FIG. 1, and the side plate 4a receives a downward pressing force, so that the printing mechanism A is lowered. At the same time, the rotation of the pinion 21 causes the drive pinion 22a to rotate, thereby driving the printing axle 2 to rotate (forward rotation). This pressing down of the printing mechanism A causes the position holding cams 25a, 2 to be caused by the cam followers 28a, 28b.
Detection is made when the cam surfaces of 5b come into contact with each other.
In this state, the printing wheel 3 is held apart from the printing surface P, and the printing axle 2 rotates without resistance. This rotation is transmitted from the drive pinion 22b to the pinion 23, and the slit disk 24 rotates in conjunction with the rotation. The rotation angle is detected by a photo sensor. Printing axle 2
During this forward rotation (clockwise rotation in FIG. 4), when a type selection signal is supplied to the electromagnet device 5 by the drive circuit described later, the magnetic force of the permanent magnet 9 is canceled and the yoke 7 is selected. Rear end 1 of lever 11
1a is released, and the selection lever 11 is released from the biasing spring 1.
The rear end portion 11a is attracted to the permanent magnet 10, and the tip portion 11 is swung counterclockwise in FIG.
b engages with the ratchet 3b. Since the printing axle 2 continues to rotate, the spring arm 3c is disengaged from the notch 2a, and the printing wheel 3 stops being rotated by the printing axle 2, thereby selecting a type. While the printing axle 2 rotates approximately once, the characters on the printing wheels of all digits are selected, and at the moment the notch 26 of the position holding cam enters the cam followers 28a, 28b, the printing mechanism A is activated by the spring force of the spring 17. The printing wheel 3 rapidly descends, and the printing characters 3a of the printing wheel 3 come into elastic contact with the printing surface P to print the selected printing characters.

In this example, the manual pressing force applied to the handle 14 is applied to the rack plate 1 through a pressing spring 17.
9, the rotational speed of the printing axle 2 is determined by the spring force regardless of the manual pressing force and pressing speed, so that the response time of the electromagnetic device 5 when selecting type can be secured, and the selection lever 11 can be operated without malfunction. You can choose the font.

When the handle 14 is released upon completion of printing, the handle is raised by the spring force of the return spring 18, the pressure spring 17 is extended, and the lower guide shaft 15b and the rack plate 1
9. Raise the printing mechanism A via the guide pin 20 and the side plate 4a. At the same time, the pinion 21 is rotated clockwise in FIG. 1 by the rising of the rack tooth 19a, and the drive pinion 22a is rotated counterclockwise, so that the printing axle 2 rotates backward. During this backward rotation, the spring arm 3c again engages with the notch 2a, and the printing wheel 3 rotates following the backward rotation of the printing axle 2, returning to the initial position shown in the fourth figure.

In Figures 1 and 3, 38 and 39 are fixed contents,
For example, it is a stamp that prints a company name, department name, etc., and is printed together with the above printing operation. The stamps 38 and 39 are the locking grooves 4 provided on the side plates 4a and 4b.
Locking claws 38a and 39a are engaged with the lower sides of 0 and 41, and are attached so as to be elastically displaceable upward. Reference numeral 42 denotes an ink roller, which supplies ink by contacting the type 3a when the printing wheel 3 rotates, and after a type is selected, it is provided at a position opposite to a portion without type.

Note that the push-down detection means E is not limited to this example, and may be configured to detect push-down by providing a switch that turns on and off when the handle 14 is pushed down. Furthermore, the rotation drive means C of the printing axle 2 is not limited to the above example, and the drive pinion 22a may be directly engaged with the rack teeth 19a.
The motor may be driven by a switch that is turned on and off when the button 4 is pressed down, and the printing axle 2 may be rotated by driving this motor. The drive circuit will be explained. In FIG. 5, a crystal oscillation circuit 33 is used as a reference signal source, and a timekeeping circuit 34 measures the year, month, day, hour, minute, and second. The clock circuit 34 can adjust the time etc. using the set key 32. The output of the clock circuit 34 is supplied to a memory circuit 35 composed of a gate circuit 35a and a buffer memory 35b. The output of the buffer memory 35b is sent to a control circuit 36 consisting of a print control circuit 36a and a display control circuit 36b.
is supplied to When no printing operation is performed, the handle 14 is not pressed down and is in the raised position as shown in the first figure. At this time, since no output is supplied from the press detection means E, the output of the clock circuit 34 passes through the gate circuit 35a, is supplied to the display control circuit via the buffer memory 35b, and is further supplied to the display control circuit 3.
The current time is displayed in the display window 29 by the display means 30 via the display 6b. When the handle 14 is pressed down during printing, the printing mechanism A is lowered as described above, and the press detection means E is activated and turned on, thereby closing the gate of the gate circuit 35a. Therefore, the time data immediately before the gate closes is held in the buffer memory 35b. The contents of the buffer memory 35b are supplied to the control circuit 36, and the display means 30 is displayed in the display window 29 as described above.
At the same time, the printing control circuit 36a is supplied with the output from the buffer memory 35b and the output of the rotation angle detection means D detecting the rotation of the printing axle 2 caused by the rotation driving means C described above. and supplies a selection signal to the electromagnet device 5. Therefore, the type selection mechanism B of the above-mentioned printing mechanism A
The characters on the printing wheel 3 for each digit are selected, and the time corresponding to the contents of the stored memory circuit is printed. After printing, the handle is released from being depressed and the depression detection means E is turned off, which opens the gate of the gate circuit 35a and transfers the current time from the clock circuit 34 to the memory circuit 35, updating the contents of the buffer memory 35b. , the current time is displayed in the display window 29 as described above.

According to the drive circuit shown in FIG. 6, the crystal oscillation circuit 3
3 and the clock circuit 34, a counting circuit 37 is provided. Counting circuit 37 by setting key 32
When an initial value is set and supplied to the memory circuit 35, the contents of the memory circuit are supplied to the display means 30 via the display control circuit 36b, and the count is displayed in the display window 29. When the press detection means E is activated and turned on by the printing operation and is supplied to the memory circuit 35,
The output of the counting circuit 37 is held and sent to the display window 2 via the control circuit 36 and the display means 30 in the same way as above.
At the same time, the print control circuit 3 displays the count which is the content of the buffer memory 35b in the buffer memory 35b.
The selection signal from 6a selects the printed characters, and the count, which is the content of the memory circuit 35 held, is printed. After printing, the handle 14 is released, and a falling signal, which is an output when the handle 14 rises, is supplied from the push detection means E to the counting circuit 37, where it is incremented by "1", and transferred to the memory circuit 35, where it is stored in the buffer memory. The contents of 35b are updated via the display means 30, and the updated count is displayed in the display window 29 as described above.

According to the drive circuit shown in FIG. 7, both the clock circuit 34 and the counting circuit 37 are provided, and the clock circuit 34
The output of the counting circuit 37 and the output of the counting circuit 37 are selectively supplied to the memory circuit 35, and includes a switching means 32 using a set key. When switched to the clock circuit 34 by the set key 32, it operates in the same manner as shown in the fifth figure, and when switched to the counting circuit 37 by the set key, it operates in the same manner as shown in the sixth figure.

(Effects of the Invention) According to the present invention, the mechanism is simple, downsizing can be achieved, electric energy consumption is low, and battery life can be significantly extended. By transmitting the push down of the handle to the printing mechanism via the pressure spring and rotating the printing axle, the selection of type is accurate and reliable.
Printing becomes uniform. By selectively switching between the clock circuit and the counting circuit, it can be used not only as a time stamp but also as a numbering stamp, making it suitable for various uses.

[Brief explanation of drawings]

Figure 1 is a sectional view taken along the line I-I in Figure 2, Figure 2 is a partially cutaway front view, Figure 3 is a sectional view taken along the line shown in Figure 2, and Figure 4 is a printing mechanism for explaining type selection. The enlarged sectional view of FIGS. 5 to 7 are drive circuit diagrams. A...Printing mechanism, B...Character selection mechanism, C...
Rotation drive mechanism, D...Rotation angle detection means, E...Press detection means, P...Printed surface, 1...Exterior case,
2... Printing axle, 3... Printing wheel, 3a... Type,
3b... Ratchet, 5... Electromagnetic device, 11...
...Selection lever, 14...Handle, 17...Press spring, 18...Return spring, 19...Rack plate, 21
... Pinion, 22a, 22b ... Drive pinion, 2
5a, 25b...Position holding cam, 28a, 28b
...Cam follower, 29...Display window, 30...Display means, 32...Set key (switching means), 34
...Time measurement circuit, 35...Memory circuit, 36...Control circuit, 37...Counting circuit.

Claims (1)

[Scope of Claims] 1. A plurality of printing wheels arranged side by side on a printing axle so as to be rotated frictionally following the rotation of the printing axle and having type letters on the outer periphery and a ratchet on the side surface, and a plurality of printing wheels that are connected to the ratchet through an electromagnetic device. a type selection mechanism that includes a selection lever to match, stops the driven rotation of the printing wheel when the printing axle rotates forward, and returns the printing wheel to the initial position when the printing axle rotates backward; a printing mechanism housed so as to be movable up and down; a handle provided relatively movably up and down on the upper part of the exterior case for moving the printing mechanism up and down; a rotational drive means for driving the printing axle in reciprocating rotation; a rotational angle detection means for detecting a rotational angle of the printing axle; and a notch fixed to the printing axle and having a notch in a part of the cam surface on the outer periphery of the outer case. When the cam surface comes into contact with a cam follower supported by the cam follower, the printing wheel is held at a position away from the printing surface, and when the cam follower enters the notch, the printing wheel is prevented from coming into contact with the printing surface. a position holding cam of the printing mechanism that allows the above-mentioned printing mechanism; a push-down detection means that detects the push-down of the handle; a clock circuit that is provided inside the exterior case and measures time; and an output of the clock circuit that is supplied with the a drive circuit comprising: a memory circuit that holds the output of the clock circuit when the push-down detection means is activated; and a control circuit that is supplied with each output of the memory circuit and the rotation angle detection means and supplies a selection signal to the electromagnetic device; A portable printing stamp equipped with and. 2. The portable printing stamp according to claim 1, wherein the handle moves the printing mechanism up and down via a spring. 3. The portable printing stamp according to claim 2, wherein the spring includes a pressing spring and a return spring. 4. The portable printing stamp according to claim 1, wherein the press detection means is constituted by a position holding cam and a cam follower. 5 In claim 1, the rotational drive means for the printing axle includes a rack that is linked to the vertical movement of the handle, a pinion that meshes with the rack, and a drive cannon that meshes with the pinion and is fixed to the printing axle. A portable printing stamp characterized by consisting of. 6. The portable printing stamp according to claim 5, characterized in that the rack is linked to the vertical movement of the handle via a spring. 7 A plurality of printing wheels arranged in parallel on a printing axle so as to be rotated frictionally following the rotation of the printing axle, and having letters on the outer periphery and a ratchet on the side surface, and a selection lever that engages with the ratchet through an electromagnetic device. and a type selection mechanism that stops the driven rotation of the printing wheel when the printing axle rotates forward and returns the printing wheel to the initial position when the printing axle rotates backward, and is housed in the exterior case so as to be vertically movable. a printing mechanism located at the top of the exterior case; a handle provided on the upper part of the exterior case so as to be relatively movable up and down and for moving the printing mechanism up and down; and a reciprocating rotation drive of the printing axle in conjunction with the up and down movement of the handle. a rotational drive means for detecting a rotational angle of the printing axle; and a cam follower fixed to the printing axle, having a notch in a part of the outer cam surface, and supported by the exterior case. a position of the printing mechanism that holds the printing wheel at a position away from the printing surface when the cam surfaces are in contact with each other, and allows the printing wheel to come into contact with the printing surface when the cam follower enters the notch; a holding cam; a push-down detection means for detecting a push-down of the handle; a counting circuit that is provided in the exterior case and is activated by an output of the push-down detection means when the push-down detection means is raised;
A memory circuit that holds the output of the counting circuit when the output of the counting circuit is supplied and the press detection means is activated; and a memory circuit that is supplied with each output of the memory circuit and the rotation angle detection means and sends a selection signal to the electromagnetic device. A portable printing stamp, comprising: a drive circuit having a control circuit for supplying the drive circuit; 8 A plurality of printing wheels arranged in parallel on the printing axle so as to be rotated frictionally following the rotation of the printing axle and having type on the outer periphery and a ratchet on the side surface, and a selection lever that engages with the ratchet through an electromagnetic device. a type selection mechanism that stops the driven rotation of the printing wheel when the printing axle rotates forward and returns the printing to the initial position when the printing axle rotates backward; a printing wheel mechanism, a handle provided on the upper part of the exterior case so as to be relatively movable up and down and for moving the printing mechanism up and down, and reciprocating rotation of the printing axle in conjunction with the up and down movement of the handle. a rotational drive means for detecting a rotational angle of the printing axle; and a cam follower fixed to the printing axle, having a notch in a part of the outer cam surface, and supported by the exterior case. a position of the printing mechanism that holds the printing wheel at a position away from the printing surface when the cam surfaces are in contact with each other, and allows the printing wheel to come into contact with the printing surface when the cam follower enters the notch; a holding cam; a push-down detection means for detecting push-down of the handle; a counting circuit provided in the exterior case and activated by the output of the clock circuit and the push-down detection means when the push-down detection means is raised; a switching means for switching between the clock circuit and the counting circuit; and a memory circuit that is supplied with the outputs of the clock circuit and the counting circuit switched by the switching means and holds the outputs of the clock circuit and the counting circuit when the press detection means is activated. and a drive circuit having the memory circuit and a control circuit supplied with each output of the rotation angle detection means and supplying a selection signal to the electromagnetic device.